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// Portions Copyright [2016] [Payara Foundation and/or its affiliates]
package org.glassfish.web.loader;
import com.sun.appserv.BytecodePreprocessor;
import com.sun.appserv.ClassLoaderUtil;
import com.sun.appserv.server.util.PreprocessorUtil;
import com.sun.enterprise.deployment.Application;
import com.sun.enterprise.deployment.util.DOLUtils;
import com.sun.enterprise.util.io.FileUtils;
import org.apache.naming.JndiPermission;
import org.apache.naming.resources.DirContextURLStreamHandler;
import org.apache.naming.resources.JarFileResourcesProvider;
import org.apache.naming.resources.ProxyDirContext;
import org.apache.naming.resources.WebDirContext;
import org.apache.naming.resources.Resource;
import org.apache.naming.resources.ResourceAttributes;
import org.glassfish.api.deployment.InstrumentableClassLoader;
import org.glassfish.web.util.ExceptionUtils;
import org.glassfish.web.util.IntrospectionUtils;
import org.glassfish.hk2.api.PreDestroy;
import com.sun.enterprise.security.integration.DDPermissionsLoader;
import com.sun.enterprise.security.integration.PermsHolder;
import javax.naming.Binding;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import java.io.*;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.*;
import java.text.MessageFormat;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.jar.Attributes;
import java.util.jar.Attributes.Name;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Specialized web application class loader.
*
* This class loader is a full reimplementation of the
* URLClassLoader from the JDK. It is desinged to be fully
* compatible with a normal URLClassLoader, although its internal
* behavior may be completely different.
*
* IMPLEMENTATION NOTE - This class loader faithfully follows
* the delegation model recommended in the specification. The system class
* loader will be queried first, then the local repositories, and only then
* delegation to the parent class loader will occur. This allows the web
* application to override any shared class except the classes from J2SE.
* Special handling is provided from the JAXP XML parser interfaces, the JNDI
* interfaces, and the classes from the servlet API, which are never loaded
* from the webapp repository.
*
* IMPLEMENTATION NOTE - Due to limitations in Jasper
* compilation technology, any repository which contains classes from
* the servlet API will be ignored by the class loader.
*
* IMPLEMENTATION NOTE - The class loader generates source
* URLs which include the full JAR URL when a class is loaded from a JAR file,
* which allows setting security permission at the class level, even when a
* class is contained inside a JAR.
*
* IMPLEMENTATION NOTE - Local repositories are searched in
* the order they are added via the initial constructor and/or any subsequent
* calls to addRepository() or addJar().
*
* IMPLEMENTATION NOTE - No check for sealing violations or
* security is made unless a security manager is present.
*
* @author Remy Maucherat
* @author Craig R. McClanahan
* @version $Revision: 1.1.2.1 $ $Date: 2007/08/17 15:46:27 $
*/
public class WebappClassLoader
extends URLClassLoader
implements Reloader, InstrumentableClassLoader, PreDestroy,
DDPermissionsLoader, JarFileResourcesProvider
{
// ------------------------------------------------------- Static Variables
private static final Logger logger = LogFacade.getLogger();
private static final ResourceBundle rb = logger.getResourceBundle();
/**
* Set of package names which are not allowed to be loaded from a webapp
* class loader without delegating first.
*/
private static final String[] packageTriggers = {
"javax", // Java extensions
// START PE 4985680
"sun", // Sun classes
// END PE 4985680
"org.xml.sax", // SAX 1 & 2
"org.w3c.dom", // DOM 1 & 2
"org.apache.taglibs.standard", // JSTL (Java EE 5)
"com.sun.faces", // JSF (Java EE 5)
"org.apache.commons.logging" // Commons logging
};
/**
* All permission.
*/
private static final Permission ALL_PERMISSION = new AllPermission();
// ----------------------------------------------------- Instance Variables
// START PE 4989455
/**
* Use this variable to invoke the security manager when a resource is
* loaded by this classloader.
*/
private boolean packageDefinitionEnabled =
System.getProperty("package.definition") == null ? false : true;
// END OF PE 4989455
/**
* Associated directory context giving access to the resources in this
* webapp.
*/
protected DirContext resources = null;
/**
* The cache of ResourceEntry for classes and resources we have loaded,
* keyed by resource name.
*/
protected ConcurrentHashMap resourceEntries =
new ConcurrentHashMap();
/**
* The list of not found resources.
*/
protected ConcurrentHashMap notFoundResources =
new ConcurrentHashMap();
/**
* The debugging detail level of this component.
*/
protected int debug = 0;
/**
* Should this class loader delegate to the parent class loader
* before searching its own repositories (i.e. the
* usual Java2 delegation model)? If set to false,
* this class loader will search its own repositories first, and
* delegate to the parent only if the class or resource is not
* found locally.
*/
protected boolean delegate = false;
/**
* Last time a JAR was accessed.
*/
protected long lastJarAccessed = 0L;
/**
* The list of local repositories, in the order they should be searched
* for locally loaded classes or resources.
*/
protected String[] repositories = new String[0];
/**
* Repositories URLs, used to cache the result of getURLs.
*/
protected URL[] repositoryURLs = null;
/**
* Repositories translated as path in the work directory (for Jasper
* originally), but which is used to generate fake URLs should getURLs be
* called.
*/
protected File[] files = new File[0];
/**
* The list of JARs, in the order they should be searched
* for locally loaded classes or resources.
*/
protected JarFile[] jarFiles = new JarFile[0];
/**
* Lock to synchronize closing and opening of jar
*/
protected final Object jarFilesLock = new Object();
/**
* The list of JARs, in the order they should be searched
* for locally loaded classes or resources.
*/
protected File[] jarRealFiles = new File[0];
/**
* The path which will be monitored for added Jar files.
*/
protected String jarPath = null;
/**
* The list of JARs, in the order they should be searched
* for locally loaded classes or resources.
*/
protected List jarNames = new ArrayList();
/**
* The list of JARs last modified dates, in the order they should be
* searched for locally loaded classes or resources.
*/
protected long[] lastModifiedDates = new long[0];
/**
* The list of resources which should be checked when checking for
* modifications.
*/
protected String[] paths = new String[0];
/**
* A list of read File and Jndi Permission's required if this loader
* is for a web application context.
*/
private ConcurrentLinkedQueue permissionList =
new ConcurrentLinkedQueue();
//holder for declared and ee permissions
private PermsHolder permissionsHolder;
/**
* Path where resources loaded from JARs will be extracted.
*/
protected File loaderDir = null;
protected String canonicalLoaderDir = null;
/**
* The PermissionCollection for each CodeSource for a web
* application context.
*/
private ConcurrentHashMap loaderPC =
new ConcurrentHashMap();
/**
* Instance of the SecurityManager installed.
*/
private SecurityManager securityManager = null;
/**
* The parent class loader.
*/
private ClassLoader parent = null;
/**
* The system class loader.
*/
private ClassLoader system = null;
/**
* Has this component been started?
*/
protected boolean started = false;
/**
* Has external repositories.
*/
protected boolean hasExternalRepositories = false;
// START SJSAS 6344989
/**
* List of byte code pre-processors per webapp class loader.
*/
private ConcurrentLinkedQueue byteCodePreprocessors =
new ConcurrentLinkedQueue();
// END SJSAS 6344989
private boolean useMyFaces;
// START PE 4985680
/**
* List of packages that may always be overridden, regardless of whether
* they belong to a protected namespace (i.e., a namespace that may never
* be overridden by any webapp)
*/
private ConcurrentLinkedQueue overridablePackages;
// END PE 4985680
private volatile boolean resourcesExtracted = false;
/**
* Should Tomcat attempt to null out any static or final fields from loaded
* classes when a web application is stopped as a work around for apparent
* garbage collection bugs and application coding errors? There have been
* some issues reported with log4j when this option is true. Applications
* without memory leaks using recent JVMs should operate correctly with this
* option set to false. If not specified, the default value of
* false will be used.
*/
private boolean clearReferencesStatic = false;
/**
* Name of associated context used with logging and JMX to associate with
* the right web application. Particularly useful for the clear references
* messages. Defaults to unknown but if standard Tomcat components are used
* it will be updated during initialisation from the resources.
*/
private String contextName = "unknown";
/**
* Use anti JAR locking code, which does URL rerouting when accessing
* resources.
*/
boolean antiJARLocking = false;
/**
* Reference to the JDBC Leak Prevention class.
* Held uniquely due to the way it is accessed outside the normal
* ClassLoader mechanism.
*/
private Class jdbcLeakPreventionResourceClass = null;
private final Application application;
// ----------------------------------------------------------- Constructors
/**
* Construct a new ClassLoader with no defined repositories and no
* parent ClassLoader.
* @param application
*/
public WebappClassLoader(Application application) {
super(new URL[0]);
this.application = application;
init();
}
/**
* Construct a new ClassLoader with the given parent ClassLoader,
* but no defined repositories.
* @param parent
* @param application
*/
public WebappClassLoader(ClassLoader parent, Application application) {
super(new URL[0], parent);
this.application = application;
init();
}
/**
* for use in OSGi loader
*
* @param parent
*/
public WebappClassLoader(ClassLoader parent) {
this(parent, Application.createApplication());
}
/**
* Construct a new ClassLoader with the given parent ClassLoader
* and defined repositories.
* @param urls
* @param parent
* @param application
*/
public WebappClassLoader(URL[] urls, ClassLoader parent, Application application) {
super(new URL[0], parent);
this.application = application;
if (urls != null && urls.length > 0) {
for (URL url : urls) {
super.addURL(url);
}
}
init();
}
// ------------------------------------------------------------- Properties
protected class PrivilegedFindResource
implements PrivilegedAction {
private File file;
private String path;
PrivilegedFindResource(File file, String path) {
this.file = file;
this.path = path;
}
public ResourceEntry run() {
return findResourceInternal(file, path);
}
}
protected static final class PrivilegedGetClassLoader
implements PrivilegedAction {
public Class clazz;
public PrivilegedGetClassLoader(Class clazz){
this.clazz = clazz;
}
public ClassLoader run() {
return clazz.getClassLoader();
}
}
// START PE 4985680
/**
* Adds the given package name to the list of packages that may always be
* overriden, regardless of whether they belong to a protected namespace
*/
public synchronized void addOverridablePackage(String packageName){
if (overridablePackages == null){
overridablePackages = new ConcurrentLinkedQueue();
}
overridablePackages.add(packageName);
}
// END PE 4985680
/**
* Get associated resources.
*/
public DirContext getResources() {
return this.resources;
}
/**
* Set associated resources.
*/
public void setResources(DirContext resources) {
this.resources = resources;
DirContext res = resources;
if (resources instanceof ProxyDirContext) {
ProxyDirContext proxyRes = (ProxyDirContext)res;
contextName = proxyRes.getContextName();
res = proxyRes.getDirContext();
}
if (res instanceof WebDirContext) {
((WebDirContext)res).setJarFileResourcesProvider(this);
}
}
/**
* Return the context name for this class loader.
*/
public String getContextName() {
return (this.contextName);
}
public ConcurrentHashMap getResourceEntries() {
return resourceEntries;
}
/**
* Return the debugging detail level for this component.
*/
public int getDebug() {
return (this.debug);
}
/**
* Set the debugging detail level for this component.
*
* @param debug The new debugging detail level
*/
public void setDebug(int debug) {
this.debug = debug;
}
/**
* Return the "delegate first" flag for this class loader.
*/
public boolean getDelegate() {
return (this.delegate);
}
/**
* Set the "delegate first" flag for this class loader.
*
* @param delegate The new "delegate first" flag
*/
public void setDelegate(boolean delegate) {
this.delegate = delegate;
}
/**
* @return Returns the antiJARLocking.
*/
public boolean getAntiJARLocking() {
return antiJARLocking;
}
/**
* @param antiJARLocking The antiJARLocking to set.
*/
public void setAntiJARLocking(boolean antiJARLocking) {
this.antiJARLocking = antiJARLocking;
}
@Override
public JarFile[] getJarFiles() {
if (!openJARs()) {
return null;
}
return jarFiles;
}
/**
* If there is a Java SecurityManager create a read FilePermission
* or JndiPermission for the file directory path.
*
* @param path file directory path
*/
public void addPermission(String path) {
if (path == null) {
return;
}
if (securityManager != null) {
securityManager.checkSecurityAccess(
DDPermissionsLoader.SET_EE_POLICY);
Permission permission = null;
if( path.startsWith("jndi:") || path.startsWith("jar:jndi:") ) {
if (!path.endsWith("/")) {
path = path + "/";
}
permission = new JndiPermission(path + "*");
permissionList.add(permission);
} else {
if (!path.endsWith(File.separator)) {
permission = new FilePermission(path, "read");
permissionList.add(permission);
path = path + File.separator;
}
permission = new FilePermission(path + "-", "read");
permissionList.add(permission);
}
}
}
/**
* If there is a Java SecurityManager create a read FilePermission
* or JndiPermission for URL.
*
* @param url URL for a file or directory on local system
*/
public void addPermission(URL url) {
if (url != null) {
addPermission(url.toString());
}
}
/**
* If there is a Java SecurityManager create a Permission.
*
* @param permission permission to add
*/
public void addPermission(Permission permission) {
if ((securityManager != null) && (permission != null)) {
securityManager.checkSecurityAccess(
DDPermissionsLoader.SET_EE_POLICY);
permissionList.add(permission);
}
}
@Override
public void addDeclaredPermissions(PermissionCollection declaredPc
) throws SecurityException {
if (securityManager != null) {
securityManager.checkSecurityAccess(
DDPermissionsLoader.SET_EE_POLICY);
permissionsHolder.setDeclaredPermissions(declaredPc);
}
}
@Override
public void addEEPermissions(PermissionCollection eePc)
throws SecurityException {
if (securityManager != null) {
securityManager.checkSecurityAccess(
DDPermissionsLoader.SET_EE_POLICY);
permissionsHolder.setEEPermissions(eePc);
}
}
/**
* Return the JAR path.
*/
public String getJarPath() {
return this.jarPath;
}
/**
* Change the Jar path.
*/
public void setJarPath(String jarPath) {
this.jarPath = jarPath;
}
/**
* Change the work directory.
*/
public void setWorkDir(File workDir) {
this.loaderDir = new File(workDir, "loader_" + this.hashCode());
try {
canonicalLoaderDir = this.loaderDir.getCanonicalPath();
if (!canonicalLoaderDir.endsWith(File.separator)) {
canonicalLoaderDir += File.separator;
}
} catch (IOException ioe) {
canonicalLoaderDir = null;
}
}
public void setUseMyFaces(boolean useMyFaces) {
this.useMyFaces = useMyFaces;
if (useMyFaces) {
addOverridablePackage("javax.faces");
addOverridablePackage("com.sun.faces");
}
}
/**
* Return the clearReferencesStatic flag for this Context.
*/
public boolean getClearReferencesStatic() {
return (this.clearReferencesStatic);
}
/**
* Set the clearReferencesStatic feature for this Context.
*
* @param clearReferencesStatic The new flag value
*/
public void setClearReferencesStatic(boolean clearReferencesStatic) {
this.clearReferencesStatic = clearReferencesStatic;
}
// ------------------------------------------------------- Reloader Methods
/**
* Add a new repository to the set of places this ClassLoader can look for
* classes to be loaded.
*
* @param repository Name of a source of classes to be loaded, such as a
* directory pathname, a JAR file pathname, or a ZIP file pathname
*
* @exception IllegalArgumentException if the specified repository is
* invalid or does not exist
*/
public void addRepository(String repository) {
// Ignore any of the standard repositories, as they are set up using
// either addJar or addRepository
if (repository.startsWith("/WEB-INF/lib")
|| repository.startsWith("/WEB-INF/classes"))
return;
// Add this repository to our underlying class loader
try {
addRepository(new URL(repository));
} catch (MalformedURLException e) {
IllegalArgumentException iae = new IllegalArgumentException
("Invalid repository: " + repository);
iae.initCause(e);
throw iae;
}
}
public void addRepository(URL url) {
super.addURL(url);
hasExternalRepositories = true;
}
/**
* Add a new repository to the set of places this ClassLoader can look for
* classes to be loaded.
*
* @param repository Name of a source of classes to be loaded, such as a
* directory pathname, a JAR file pathname, or a ZIP file pathname
*
* @exception IllegalArgumentException if the specified repository is
* invalid or does not exist
*/
public synchronized void addRepository(String repository, File file) {
// Note : There should be only one (of course), but I think we should
// keep this a bit generic
if (repository == null)
return;
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, "addRepository(" + repository + ")");
int i;
// Add this repository to our internal list
String[] result = new String[repositories.length + 1];
for (i = 0; i < repositories.length; i++) {
result[i] = repositories[i];
}
result[repositories.length] = repository;
repositories = result;
// Add the file to the list
File[] result2 = new File[files.length + 1];
for (i = 0; i < files.length; i++) {
result2[i] = files[i];
}
result2[files.length] = file;
files = result2;
}
public synchronized void addJar(String jar, JarFile jarFile, File file)
throws IOException {
if (jar == null)
return;
if (jarFile == null)
return;
if (file == null)
return;
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, "addJar(" + jar + ")");
// See IT 11417
super.addURL(getURL(file));
int i;
if ((jarPath != null) && (jar.startsWith(jarPath))) {
String jarName = jar.substring(jarPath.length());
while (jarName.startsWith("/")) {
jarName = jarName.substring(1);
}
jarNames.add(jarName);
}
try {
// Register the JAR for tracking
long lastModified =
((ResourceAttributes) resources.getAttributes(jar))
.getLastModified();
String[] result = new String[paths.length + 1];
for (i = 0; i < paths.length; i++) {
result[i] = paths[i];
}
result[paths.length] = jar;
paths = result;
long[] result3 = new long[lastModifiedDates.length + 1];
for (i = 0; i < lastModifiedDates.length; i++) {
result3[i] = lastModifiedDates[i];
}
result3[lastModifiedDates.length] = lastModified;
lastModifiedDates = result3;
} catch (NamingException e) {
// Ignore
}
JarFile[] result2 = new JarFile[jarFiles.length + 1];
for (i = 0; i < jarFiles.length; i++) {
result2[i] = jarFiles[i];
}
result2[jarFiles.length] = jarFile;
jarFiles = result2;
// Add the file to the list
File[] result4 = new File[jarRealFiles.length + 1];
for (i = 0; i < jarRealFiles.length; i++) {
result4[i] = jarRealFiles[i];
}
result4[jarRealFiles.length] = file;
jarRealFiles = result4;
}
/**
* Have one or more classes or resources been modified so that a reload
* is appropriate?
*/
public boolean modified() {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, "modified()");
// Checking for modified loaded resources
int length = paths.length;
// A rare race condition can occur in the updates of the two arrays
// It's totally ok if the latest class added is not checked (it will
// be checked the next time
int length2 = lastModifiedDates.length;
if (length > length2)
length = length2;
for (int i = 0; i < length; i++) {
try {
long lastModified =
((ResourceAttributes) resources.getAttributes(paths[i]))
.getLastModified();
if (lastModified != lastModifiedDates[i]) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Resource '" + paths[i]
+ "' was modified; Date is now: "
+ new java.util.Date(lastModified) + " Was: "
+ new java.util.Date(lastModifiedDates[i]));
return (true);
}
} catch (NamingException e) {
logger.log(Level.SEVERE, LogFacade.MISSING_RESOURCE, paths[i]);
return (true);
}
}
length = jarNames.size();
// Check if JARs have been added or removed
if (getJarPath() != null) {
try {
NamingEnumeration enumeration =
resources.listBindings(getJarPath());
int i = 0;
while (enumeration.hasMoreElements() && (i < length)) {
NameClassPair ncPair = enumeration.nextElement();
String name = ncPair.getName();
// Ignore non JARs present in the lib folder
// START OF IASRI 4657979
if (!name.endsWith(".jar") && !name.endsWith(".zip"))
// END OF IASRI 4657979
continue;
if (!name.equals(jarNames.get(i))) {
// Missing JAR
logger.log(Level.FINER, " Additional JARs have been added : '"
+ name + "'");
return (true);
}
i++;
}
if (enumeration.hasMoreElements()) {
while (enumeration.hasMoreElements()) {
NameClassPair ncPair = enumeration.nextElement();
String name = ncPair.getName();
// Additional non-JAR files are allowed
// START OF IASRI 4657979
if (name.endsWith(".jar") || name.endsWith(".zip")) {
// END OF IASRI 4657979
// There was more JARs
logger.log(Level.FINER, " Additional JARs have been added");
return (true);
}
}
} else if (i < jarNames.size()) {
// There was less JARs
logger.log(Level.FINER, " Additional JARs have been added");
return (true);
}
} catch (NamingException e) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Failed tracking modifications of '"
+ getJarPath() + "'");
} catch (ClassCastException e) {
logger.log(Level.SEVERE, LogFacade.FAILED_TRACKING_MODIFICATIONS, new Object[]{getJarPath(), e.getMessage()});
}
}
// No classes have been modified
return (false);
}
/**
* Render a String representation of this object.
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("WebappClassLoader (delegate=");
sb.append(delegate);
if (repositories != null) {
sb.append("; repositories=");
for (int i = 0; i < repositories.length; i++) {
sb.append(repositories[i]);
if (i != (repositories.length-1)) {
sb.append(",");
}
}
}
sb.append(")");
return (sb.toString());
}
// ---------------------------------------------------- ClassLoader Methods
/**
* Find the specified class in our local repositories, if possible. If
* not found, throw ClassNotFoundException.
*
* @param name Name of the class to be loaded
*
* @exception ClassNotFoundException if the class was not found
*/
@Override
protected Class findClass(String name) throws ClassNotFoundException {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " findClass(" + name + ")");
// (1) Permission to define this class when using a SecurityManager
// START PE 4989455
//if (securityManager != null) {
if ( securityManager != null && packageDefinitionEnabled ){
// END PE 4989455
int i = name.lastIndexOf('.');
if (i >= 0) {
try {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " securityManager.checkPackageDefinition");
securityManager.checkPackageDefinition(name.substring(0,i));
} catch (Exception se) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " -->Exception-->ClassNotFoundException", se);
throw new ClassNotFoundException(name, se);
}
}
}
// Ask our superclass to locate this class, if possible
// (throws ClassNotFoundException if it is not found)
Class clazz = null;
try {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " findClassInternal(" + name + ")");
try {
ResourceEntry entry = findClassInternal(name);
// Create the code source object
CodeSource codeSource =
new CodeSource(entry.codeBase, entry.certificates);
synchronized (this) {
if (entry.loadedClass == null) {
/* START GlassFish [680]
clazz = defineClass(name, entry.binaryContent, 0,
entry.binaryContent.length,
codeSource);
*/
// START GlassFish [680]
// We use a temporary byte[] so that we don't change
// the content of entry in case bytecode
// preprocessing takes place.
byte[] binaryContent = entry.binaryContent;
if (!byteCodePreprocessors.isEmpty()) {
// ByteCodePreprpcessor expects name as
// java/lang/Object.class
String resourceName =
name.replace('.', '/') + ".class";
for(BytecodePreprocessor preprocessor : byteCodePreprocessors) {
binaryContent = preprocessor.preprocess(
resourceName, binaryContent);
}
}
clazz = defineClass(name, binaryContent, 0,
binaryContent.length,
codeSource);
// END GlassFish [680]
entry.loadedClass = clazz;
entry.binaryContent = null;
entry.source = null;
entry.codeBase = null;
entry.manifest = null;
entry.certificates = null;
} else {
clazz = entry.loadedClass;
}
}
} catch(ClassNotFoundException cnfe) {
if (!hasExternalRepositories) {
throw cnfe;
}
} catch (UnsupportedClassVersionError ucve) {
throw new UnsupportedClassVersionError(
getString(LogFacade.UNSUPPORTED_VERSION, name, getJavaVersion()));
} catch(AccessControlException ace) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING, LogFacade.FIND_CLASS_INTERNAL_SECURITY_EXCEPTION, new Object[]{name, ace.getMessage()});
}
throw new ClassNotFoundException(name, ace);
} catch(RuntimeException rex) {
throw rex;
} catch(Error err) {
throw err;
} catch (Throwable t) {
throw new RuntimeException(
getString(LogFacade.UNABLE_TO_LOAD_CLASS, name, t.toString()), t);
}
if ((clazz == null) && hasExternalRepositories) {
try {
clazz = super.findClass(name);
} catch(AccessControlException ace) {
if (logger.isLoggable(Level.WARNING)) {
String msg = getString(LogFacade.FIND_CLASS_INTERNAL_SECURITY_EXCEPTION,
new Object[]{name, ace.getMessage()});
logger.log(Level.WARNING, msg, ace);
}
throw new ClassNotFoundException(name, ace);
} catch (RuntimeException e) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " -->RuntimeException Rethrown", e);
throw e;
}
}
if (clazz == null) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning ClassNotFoundException");
throw new ClassNotFoundException(name);
}
} catch (ClassNotFoundException e) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Passing on ClassNotFoundException");
throw e;
}
// Return the class we have located
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Returning class " + clazz);
if (logger.isLoggable(Level.FINER)) {
ClassLoader cl;
if (securityManager != null) {
cl = AccessController.doPrivileged(
new PrivilegedGetClassLoader(clazz));
} else {
cl = clazz.getClassLoader();
}
logger.log(Level.FINER, " Loaded by " + cl);
}
return (clazz);
}
/**
* Find the specified resource in our local repository, and return a
* URL referring to it, or null if this resource
* cannot be found.
*
* @param name Name of the resource to be found
*/
@Override
public URL findResource(String name) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " findResource(" + name + ")");
URL url = null;
if (".".equals(name)) {
name = "";
}
ResourceEntry entry = resourceEntries.get(name);
if (entry == null) {
entry = findResourceInternal(name, name);
}
if (entry != null) {
url = entry.source;
}
if ((url == null) && hasExternalRepositories)
url = super.findResource(name);
if (logger.isLoggable(Level.FINER)) {
if (url != null)
logger.log(Level.FINER, " --> Returning '" + url.toString() + "'");
else
logger.log(Level.FINER, " --> Resource not found, returning null");
}
return (url);
}
/**
* Return an enumeration of URLs representing all of the
* resources with the given name. If no resources with this name are
* found, return an empty enumeration.
*
* @param name Name of the resources to be found
*
* @exception IOException if an input/output error occurs
*/
@Override
public Enumeration findResources(String name) throws IOException {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " findResources(" + name + ")");
Vector result = new Vector();
if (repositories != null) {
int repositoriesLength = repositories.length;
int i;
// Looking at the repositories
for (i = 0; i < repositoriesLength; i++) {
try {
String fullPath = repositories[i] + name;
resources.lookup(fullPath);
// Note : Not getting an exception here means the resource was
// found
try {
result.addElement(getURI(new File(files[i], name)));
} catch (MalformedURLException e) {
// Ignore
}
} catch (NamingException e) {
}
}
}
Enumeration otherResourcePaths = super.findResources(name);
while (otherResourcePaths.hasMoreElements()) {
result.addElement(otherResourcePaths.nextElement());
}
return result.elements();
}
/**
* Find the resource with the given name. A resource is some data
* (images, audio, text, etc.) that can be accessed by class code in a
* way that is independent of the location of the code. The name of a
* resource is a "/"-separated path name that identifies the resource.
* If the resource cannot be found, return null.
*
* This method searches according to the following algorithm, returning
* as soon as it finds the appropriate URL. If the resource cannot be
* found, returns null.
*
* - If the
delegate property is set to true,
* call the getResource() method of the parent class
* loader, if any.
* - Call
findResource() to find this resource in our
* locally defined repositories.
* - Call the
getResource() method of the parent class
* loader, if any.
*
*
* @param name Name of the resource to return a URL for
*/
@Override
public URL getResource(String name) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, "getResource(" + name + ")");
URL url = null;
/*
* (1) Delegate to parent if requested, or if the requested resource
* belongs to one of the packages that are part of the Java EE platform
*/
if (isResourceDelegate(name)) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Delegating to parent classloader " + parent);
ClassLoader loader = parent;
if (loader == null)
loader = system;
url = loader.getResource(name);
if (url != null) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning '" + url.toString() + "'");
return (url);
}
}
// (2) Search local repositories
url = findResource(name);
if (url != null) {
if (antiJARLocking) {
// Locating the repository for special handling in the case
// of a JAR
ResourceEntry entry = resourceEntries.get(name);
try {
String repository = entry.codeBase.toString();
if ((repository.endsWith(".jar"))
&& !(name.endsWith(".class"))
&& !(name.endsWith(".jar"))) {
// Copy binary content to the work directory if not present
File resourceFile = new File(loaderDir, name);
url = resourceFile.toURI().toURL();
}
} catch (Exception e) {
// Ignore
}
}
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning '" + url.toString() + "'");
return (url);
}
// (3) Delegate to parent unconditionally if not already attempted
if (!delegate) {
ClassLoader loader = parent;
if (loader == null)
loader = system;
url = loader.getResource(name);
if (url != null) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning '" + url.toString() + "'");
return (url);
}
}
// (4) Resource was not found
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Resource not found, returning null");
return (null);
}
/**
* Find the resource with the given name, and return an input stream
* that can be used for reading it. The search order is as described
* for getResource(), after checking to see if the resource
* data has been previously cached. If the resource cannot be found,
* return null.
*
* @param name Name of the resource to return an input stream for
*/
@Override
public InputStream getResourceAsStream(String name) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, "getResourceAsStream(" + name + ")");
InputStream stream = null;
// (0) Check for a cached copy of this resource
stream = findLoadedResource(name);
if (stream != null) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning stream from cache");
return (stream);
}
/*
* (1) Delegate to parent if requested, or if the requested resource
* belongs to one of the packages that are part of the Java EE platform
*/
if (isResourceDelegate(name)) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Delegating to parent classloader " + parent);
ClassLoader loader = parent;
if (loader == null)
loader = system;
stream = loader.getResourceAsStream(name);
if (stream != null) {
// FIXME - cache???
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning stream from parent");
return (stream);
}
}
// (2) Search local repositories
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Searching local repositories");
URL url = findResource(name);
if (url != null) {
// FIXME - cache???
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning stream from local");
stream = findLoadedResource(name);
try {
if (hasExternalRepositories && (stream == null))
stream = url.openStream();
} catch (IOException e) {
; // Ignore
}
if (stream != null)
return (stream);
}
// (3) Delegate to parent unconditionally
if (!delegate) {
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " Delegating to parent classloader unconditionally " + parent);
ClassLoader loader = parent;
if (loader == null)
loader = system;
stream = loader.getResourceAsStream(name);
if (stream != null) {
// FIXME - cache???
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Returning stream from parent");
return (stream);
}
}
// (4) Resource was not found
if (logger.isLoggable(Level.FINER))
logger.log(Level.FINER, " --> Resource not found, returning null");
return (null);
}
/**
* Finds all the resources with the given name.
*/
@Override
public Enumeration getResources(String name) throws IOException {
final Enumeration[] enums = new Enumeration[2];
Enumeration localResources = findResources(name);
Enumeration parentResources = null;
if (parent != null) {
parentResources = parent.getResources(name);
} else {
parentResources = system.getResources(name);
}
if (delegate) {
enums[0] = parentResources;
enums[1] = localResources;
} else {
enums[0] = localResources;
enums[1] = parentResources;
}
return new Enumeration() {
int index = 0;
private boolean next() {
while (index < enums.length) {
if (enums[index] != null &&
enums[index].hasMoreElements()) {
return true;
}
index++;
}
return false;
}
public boolean hasMoreElements() {
return next();
}
public URL nextElement() {
if (!next()) {
throw new NoSuchElementException();
}
return (URL)enums[index].nextElement();
}
};
}
/**
* Load the class with the specified name. This method searches for
* classes in the same manner as loadClass(String, boolean)
* with false as the second argument.
*
* @param name Name of the class to be loaded
*
* @exception ClassNotFoundException if the class was not found
*/
@Override
public Class loadClass(String name) throws ClassNotFoundException {
return (loadClass(name, false));
}
/**
* Load the class with the specified name, searching using the following
* algorithm until it finds and returns the class. If the class cannot
* be found, returns ClassNotFoundException.
*
* - Call
findLoadedClass(String) to check if the
* class has already been loaded. If it has, the same
* Class object is returned.
* - If the
delegate property is set to true,
* call the loadClass() method of the parent class
* loader, if any.
* - Call
findClass() to find this class in our locally
* defined repositories.
* - Call the
loadClass() method of our parent
* class loader, if any.
*
* If the class was found using the above steps, and the
* resolve flag is true, this method will then
* call resolveClass(Class) on the resulting Class object.
*
* @param name Name of the class to be loaded
* @param resolve If true then resolve the class
* @return class
*
* @exception ClassNotFoundException if the class was not found
*/
@Override
protected synchronized Class loadClass(String name, boolean resolve)
throws ClassNotFoundException {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, "loadClass({0})", name);
}
Class clazz = null;
// Don't load classes if class loader is stopped
if (!started) {
throw new IllegalStateException(
getString(LogFacade.NOT_STARTED, name));
}
// (0) Check our previously loaded local class cache
clazz = findLoadedClass0(name);
if (clazz != null) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Returning class from cache");
}
if (resolve)
resolveClass(clazz);
return (clazz);
}
// (0.1) Check our previously loaded class cache
clazz = findLoadedClass(name);
if (clazz != null) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Returning class from cache");
}
if (resolve)
resolveClass(clazz);
return (clazz);
}
// (0.5) Permission to access this class when using a SecurityManager
if ( securityManager != null && packageDefinitionEnabled){
int i = name.lastIndexOf('.');
if (i >= 0) {
try {
securityManager.checkPackageAccess(name.substring(0,i));
} catch (SecurityException se) {
String error = getString(LogFacade.SECURITY_EXCEPTION, name);
if (logger.isLoggable(Level.INFO)) {
logger.log(Level.INFO, error, se);
}
throw new ClassNotFoundException(error, se);
}
}
}
ClassLoader delegateLoader = parent;
if (delegateLoader == null) {
delegateLoader = system;
}
boolean isWhitelisted = application.isWhitelistEnabled() && DOLUtils.isWhiteListed(application, name);
boolean delegateLoad = (delegate && (application.isWhitelistEnabled()? isWhitelisted : true)) || filter(name);
// (1) Delegate to our parent if requested
if (delegateLoad) {
// Check delegate first
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Delegating to classloader1 " + delegateLoader);
}
try {
clazz = delegateLoader.loadClass(name);
if (clazz != null) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Loading class from delegate");
}
if (resolve)
resolveClass(clazz);
return clazz;
}
} catch (ClassNotFoundException e) {
// Ignore
}
}
// (2) Search local repositories
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Searching local repositories");
}
try {
clazz = findClass(name);
if (clazz != null) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Loading class from local repository");
}
if (resolve)
resolveClass(clazz);
return clazz;
}
} catch (ClassNotFoundException e) {
// Ignore
}
// (3) Delegate if class was not found locally
if ((application.isWhitelistEnabled()? isWhitelisted : true) && !delegateLoad) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Delegating to classloader " + delegateLoader);
}
try {
clazz = delegateLoader.loadClass(name);
if (clazz != null) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER, " Loading class from delegate");
}
if (resolve)
resolveClass(clazz);
return clazz;
}
} catch (ClassNotFoundException e) {
// Ignore
}
}
else if(application.isWhitelistEnabled() && !isWhitelisted) {
throw new ClassNotFoundException(String.format("Whitelist enabled, but class [%s] is not whitelisted", name));
}
throw new ClassNotFoundException(name);
}
/**
* Get the Permissions for a CodeSource. If this instance
* of WebappClassLoader is for a web application context,
* add read FilePermission or JndiPermissions for the base
* directory (if unpacked),
* the context URL, and jar file resources.
*
* @param codeSource where the code was loaded from
* @return PermissionCollection for CodeSource
*/
@Override
protected PermissionCollection getPermissions(CodeSource codeSource) {
String codeUrl = codeSource.getLocation().toString();
PermissionCollection pc = loaderPC.get(codeUrl);
if (pc == null) {
pc = new Permissions();
PermissionCollection spc = super.getPermissions(codeSource);
Enumeration permsa = spc.elements();
while (permsa.hasMoreElements()) {
Permission p = permsa.nextElement();
pc.add(p);
}
Iterator perms = permissionList.iterator();
while (perms.hasNext()) {
Permission p = perms.next();
pc.add(p);
}
//get the declared and EE perms
PermissionCollection pc1 =
permissionsHolder.getPermissions(codeSource, null);
if (pc1 != null) {
Enumeration dperms = pc1.elements();
while (dperms.hasMoreElements()) {
Permission p = dperms.nextElement();
pc.add(p);
}
}
PermissionCollection tmpPc = loaderPC.putIfAbsent(codeUrl,pc);
if (tmpPc != null) {
pc = tmpPc;
}
}
return (pc);
}
/**
* Returns the search path of URLs for loading classes and resources.
* This includes the original list of URLs specified to the constructor,
* along with any URLs subsequently appended by the addURL() method.
* @return the search path of URLs for loading classes and resources.
*/
@Override
public synchronized URL[] getURLs() {
if (repositoryURLs != null) {
return repositoryURLs;
}
URL[] external = super.getURLs();
int filesLength = files.length;
int jarFilesLength = jarRealFiles.length;
int length = filesLength + jarFilesLength + external.length;
int i;
try {
ArrayList urls = new ArrayList();
for (i = 0; i < length; i++) {
if (i < filesLength) {
urls.add(i, getURL(files[i]));
} else if (i < filesLength + jarFilesLength) {
urls.add(i, getURL(jarRealFiles[i - filesLength]));
} else {
urls.add(i, external[i - filesLength - jarFilesLength]);
}
}
repositoryURLs = removeDuplicate(urls);
} catch (MalformedURLException e) {
repositoryURLs = new URL[0];
}
return repositoryURLs;
}
@SuppressWarnings("unchecked")
private URL[] removeDuplicate(ArrayList urls) {
HashSet h = new HashSet(urls);
urls.clear();
urls.addAll(h);
return urls.toArray(new URL[urls.size()]);
}
// ------------------------------------------------------ Lifecycle Methods
private void init() {
this.parent = getParent();
/* SJSAS 6317864
system = getSystemClassLoader();
*/
// START SJSAS 6317864
system = this.getClass().getClassLoader();
// END SJSAS 6317864
securityManager = System.getSecurityManager();
if (securityManager != null) {
refreshPolicy();
}
addOverridablePackage("com.sun.faces.extensions");
permissionsHolder = new PermsHolder();
}
/**
* Start the class loader.
*/
public void start() {
started = true;
}
public boolean isStarted() {
return started;
}
public void preDestroy() {
try {
stop();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Stop the class loader.
*
* @exception LifecycleException if a lifecycle error occurs
*/
public void stop() throws Exception {
if (!started) {
return;
}
// START GlassFish Issue 587
purgeELBeanClasses();
// END GlassFish Issue 587
/*
* Clearing references should be done before setting started to
* false, due to possible side effects.
* In addition, set this classloader as the Thread's context
* classloader, see IT 9894 for details
*/
ClassLoader curCl = null;
try {
curCl = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(this);
clearReferences();
} finally {
if (curCl != null) {
Thread.currentThread().setContextClassLoader(curCl);
}
}
// START SJSAS 6258619
ClassLoaderUtil.releaseLoader(this);
// END SJSAS 6258619
started = false;
int length = files.length;
for (int i = 0; i < length; i++) {
files[i] = null;
}
length = jarFiles.length;
for (int i = 0; i < length; i++) {
try {
if (jarFiles[i] != null) {
jarFiles[i].close();
}
} catch (IOException e) {
// Ignore
}
jarFiles[i] = null;
}
try {
close();
} catch (Exception e) {
// ignore
}
notFoundResources.clear();
resourceEntries.clear();
resources = null;
repositories = null;
repositoryURLs = null;
files = null;
jarFiles = null;
jarRealFiles = null;
jarPath = null;
jarNames.clear();
lastModifiedDates = null;
paths = null;
hasExternalRepositories = false;
parent = null;
permissionList.clear();
permissionsHolder = null;
loaderPC.clear();
if (loaderDir != null) {
deleteDir(loaderDir);
}
DirContextURLStreamHandler.unbind(this);
}
/**
* Used to periodically signal to the classloader to release
* JAR resources.
*/
public void closeJARs(boolean force) {
if (jarFiles.length > 0) {
synchronized (jarFilesLock) {
if (force || (System.currentTimeMillis()
> (lastJarAccessed + 90000))) {
for (int i = 0; i < jarFiles.length; i++) {
try {
if (jarFiles[i] != null) {
jarFiles[i].close();
jarFiles[i] = null;
}
} catch (IOException e) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Failed to close JAR", e);
}
}
}
try {
// aggressively close parent jars
WeakHashMap closeables;
Field closeField = URLClassLoader.class.getDeclaredField("closeables");
closeField.setAccessible(true);
closeables = (WeakHashMap) closeField.get(this);
synchronized (closeables) {
Set keys = closeables.keySet();
for (Closeable c : keys) {
try {
if (c instanceof JarFile) {
c.close();
}
} catch (IOException ioex) {
}
}
closeables.clear();
}
} catch (Exception ex) {
Logger.getLogger(WebappClassLoader.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
}
/**
* Clear references.
*/
protected void clearReferences() {
// De-register any remaining JDBC drivers
clearReferencesJdbc();
// Check for leaks triggered by ThreadLocals loaded by this class loader
checkThreadLocalsForLeaks();
// Clear RMI Targets loaded by this class loader
clearReferencesRmiTargets();
// Null out any static or final fields from loaded classes,
// as a workaround for apparent garbage collection bugs
if (clearReferencesStatic) {
clearReferencesStaticFinal();
}
// Clear the IntrospectionUtils cache.
IntrospectionUtils.clear();
// Clear the resource bundle cache
// This shouldn't be necessary, the cache uses weak references but
// it has caused leaks. Oddly, using the leak detection code in
// standard host allows the class loader to be GC'd. This has been seen
// on Sun but not IBM JREs. Maybe a bug in Sun's GC impl?
clearReferencesResourceBundles();
// Clear the classloader reference in the VM's bean introspector
java.beans.Introspector.flushCaches();
}
/**
* Deregister any JDBC drivers registered by the webapp that the webapp
* forgot. This is made unnecessary complex because a) DriverManager
* checks the class loader of the calling class (it would be much easier
* if it checked the context class loader) b) using reflection would
* create a dependency on the DriverManager implementation which can,
* and has, changed.
*
* We can't just create an instance of JdbcLeakPrevention as it will be
* loaded by the common class loader (since it's .class file is in the
* $CATALINA_HOME/lib directory). This would fail DriverManager's check
* on the class loader of the calling class. So, we load the bytes via
* our parent class loader but define the class with this class loader
* so the JdbcLeakPrevention looks like a webapp class to the
* DriverManager.
*
* If only apps cleaned up after themselves...
*/
private final void clearReferencesJdbc() {
InputStream is = getResourceAsStream(
"org/glassfish/web/loader/JdbcLeakPrevention.class");
// We know roughly how big the class will be (~ 1K) so allow 2k as a
// starting point
byte[] classBytes = new byte[2048];
int offset = 0;
try {
synchronized (this) {
if (jdbcLeakPreventionResourceClass == null) {
int read = is.read(classBytes, offset, classBytes.length-offset);
while (read > -1) {
offset += read;
if (offset == classBytes.length) {
// Buffer full - double size
byte[] tmp = new byte[classBytes.length * 2];
System.arraycopy(classBytes, 0, tmp, 0, classBytes.length);
classBytes = tmp;
}
read = is.read(classBytes, offset, classBytes.length-offset);
}
jdbcLeakPreventionResourceClass =
defineClass("org.glassfish.web.loader.JdbcLeakPrevention",
classBytes, 0, offset, this.getClass().getProtectionDomain());
} else {
logger.log(Level.FINE, getString(LogFacade.LEAK_PREVENTION_JDBC_REUSE, contextName));
}
}
Object obj = jdbcLeakPreventionResourceClass.newInstance();
@SuppressWarnings("unchecked") // clearJdbcDriverRegistrations() returns List
List driverNames = (List) obj.getClass().getMethod(
"clearJdbcDriverRegistrations").invoke(obj);
String msg = rb.getString(LogFacade.CLEAR_JDBC);
for (String name : driverNames) {
logger.warning(MessageFormat.format(msg, contextName, name));
}
} catch (Exception e) {
// So many things to go wrong above...
Throwable t = ExceptionUtils.unwrapInvocationTargetException(e);
ExceptionUtils.handleThrowable(t);
logger.log(Level.WARNING,
getString(LogFacade.JDBC_REMOVE_FAILED, contextName), t);
} finally {
if (is != null) {
try {
is.close();
} catch (IOException ioe) {
logger.log(Level.WARNING,
getString(LogFacade.JDBC_REMOVE_STREAM_ERROR, contextName), ioe);
}
}
}
}
private final void clearReferencesStaticFinal() {
Collection values = resourceEntries.values();
Iterator loadedClasses = values.iterator();
/*
* Step 1: Enumerate all classes loaded by this WebappClassLoader
* and trigger the initialization of any uninitialized ones.
* This is to prevent the scenario where the initialization of
* one class would call a previously cleared class in Step 2 below.
*/
while(loadedClasses.hasNext()) {
ResourceEntry entry = loadedClasses.next();
Class clazz = null;
synchronized(this) {
clazz = entry.loadedClass;
}
if (clazz != null) {
try {
Field[] fields = clazz.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
if(Modifier.isStatic(fields[i].getModifiers())) {
fields[i].get(null);
break;
}
}
} catch(Throwable t) {
// Ignore
}
}
}
/**
* Step 2: Clear all loaded classes
*/
loadedClasses = values.iterator();
while (loadedClasses.hasNext()) {
ResourceEntry entry = loadedClasses.next();
Class clazz = null;
synchronized(this) {
clazz = entry.loadedClass;
}
if (clazz != null) {
try {
Field[] fields = clazz.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
int mods = field.getModifiers();
if (field.getType().isPrimitive()
|| (field.getName().indexOf("$") != -1)) {
continue;
}
if (Modifier.isStatic(mods)) {
try {
setAccessible(field);
if (Modifier.isFinal(mods)) {
if (!((field.getType().getName().startsWith("java."))
|| (field.getType().getName().startsWith("javax.")))) {
nullInstance(field.get(null));
}
} else {
field.set(null, null);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Set field " + field.getName()
+ " to null in class " + clazz.getName());
}
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Could not set field " + field.getName()
+ " to null in class " + clazz.getName(), t);
}
}
}
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Could not clean fields for class " + clazz.getName(), t);
}
}
}
}
}
protected void nullInstance(Object instance) {
if (instance == null) {
return;
}
Field[] fields = instance.getClass().getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
int mods = field.getModifiers();
if (field.getType().isPrimitive()
|| (field.getName().indexOf("$") != -1)) {
continue;
}
try {
setAccessible(field);
if (Modifier.isStatic(mods) && Modifier.isFinal(mods)) {
// Doing something recursively is too risky
continue;
} else {
Object value = field.get(instance);
if (null != value) {
Class valueClass = value.getClass();
if (!loadedByThisOrChild(valueClass)) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Not setting field " + field.getName() +
" to null in object of class " +
instance.getClass().getName() +
" because the referenced object was of type " +
valueClass.getName() +
" which was not loaded by this WebappClassLoader.");
}
} else {
field.set(instance, null);
if (logger.isLoggable(Level.FINE))
logger.log(Level.FINE, "Set field " + field.getName()
+ " to null in class " + instance.getClass().getName());
}
}
}
} catch (Throwable t) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Could not set field " + field.getName()
+ " to null in object instance of class "
+ instance.getClass().getName(), t);
}
}
}
}
private void checkThreadLocalsForLeaks() {
Thread[] threads = getThreads();
try {
// Make the fields in the Thread class that store ThreadLocals
// accessible
Field threadLocalsField =
Thread.class.getDeclaredField("threadLocals");
threadLocalsField.setAccessible(true);
Field inheritableThreadLocalsField =
Thread.class.getDeclaredField("inheritableThreadLocals");
inheritableThreadLocalsField.setAccessible(true);
// Make the underlying array of ThreadLoad.ThreadLocalMap.Entry objects
// accessible
Class tlmClass = Class.forName("java.lang.ThreadLocal$ThreadLocalMap");
Field tableField = tlmClass.getDeclaredField("table");
tableField.setAccessible(true);
Method expungeStaleEntriesMethod = tlmClass.getDeclaredMethod("expungeStaleEntries");
expungeStaleEntriesMethod.setAccessible(true);
for (int i = 0; i < threads.length; i++) {
Object threadLocalMap;
if (threads[i] != null) {
// Clear the first map
threadLocalMap = threadLocalsField.get(threads[i]);
if (null != threadLocalMap){
expungeStaleEntriesMethod.invoke(threadLocalMap);
checkThreadLocalMapForLeaks(threadLocalMap, tableField);
}
// Clear the second map
threadLocalMap =inheritableThreadLocalsField.get(threads[i]);
if (null != threadLocalMap){
expungeStaleEntriesMethod.invoke(threadLocalMap);
checkThreadLocalMapForLeaks(threadLocalMap, tableField);
}
}
}
} catch (SecurityException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
} catch (NoSuchFieldException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
} catch (ClassNotFoundException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
} catch (IllegalArgumentException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
} catch (IllegalAccessException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
} catch (InvocationTargetException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
} catch (NoSuchMethodException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_FAIL,
contextName), e);
}
}
}
/**
* Analyzes the given thread local map object. Also pass in the field that
* points to the internal table to save re-calculating it on every
* call to this method.
*/
private void checkThreadLocalMapForLeaks(Object map,
Field internalTableField) throws IllegalAccessException,
NoSuchFieldException {
if (map != null) {
Object[] table = (Object[]) internalTableField.get(map);
if (table != null) {
for (int j =0; j < table.length; j++) {
if (table[j] != null) {
boolean potentialLeak = false;
// Check the key
Object key = ((Reference) table[j]).get();
if (this.equals(key) || loadedByThisOrChild(key)) {
potentialLeak = true;
}
// Check the value
Field valueField =
table[j].getClass().getDeclaredField("value");
valueField.setAccessible(true);
Object value = valueField.get(table[j]);
if (this.equals(value) || loadedByThisOrChild(value)) {
potentialLeak = true;
}
if (potentialLeak) {
Object[] args = new Object[5];
args[0] = contextName;
if (key != null) {
args[1] = getPrettyClassName(key.getClass());
try {
args[2] = key.toString();
} catch (Exception e) {
logger.log(Level.SEVERE, getString(
LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_BAD_KEY,
args[1]), e);
args[2] = getString(
LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_UNKNOWN);
}
}
if (value != null) {
args[3] = getPrettyClassName(value.getClass());
try {
args[4] = value.toString();
} catch (Exception e) {
logger.log(Level.SEVERE, getString(
LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_BAD_VALUE,
args[3]), e);
args[4] = getString(
LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_UNKNOWN);
}
}
if (value == null) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, getString(
LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS_DEBUG,
args));
}
} else {
logger.log(Level.SEVERE, getString(
LogFacade.CHECK_THREAD_LOCALS_FOR_LEAKS,
args));
}
}
}
}
}
}
}
private String getPrettyClassName(Class clazz) {
String name = clazz.getCanonicalName();
if (name==null){
name = clazz.getName();
}
return name;
}
/**
* @param o object to test, may be null
* @return true if o has been loaded by the current classloader
* or one of its descendants.
*/
private boolean loadedByThisOrChild(Object o) {
if (o == null) {
return false;
}
Class clazz;
if (o instanceof Class) {
clazz = (Class) o;
} else {
clazz = o.getClass();
}
ClassLoader cl = clazz.getClassLoader();
while (cl != null) {
if (cl == this) {
return true;
}
cl = cl.getParent();
}
if (o instanceof Collection) {
Iterator iter = ((Collection) o).iterator();
while (iter.hasNext()) {
Object entry = iter.next();
if (loadedByThisOrChild(entry)) {
return true;
}
}
}
return false;
}
/*
* Get the set of current threads as an array.
*/
private Thread[] getThreads() {
// Get the current thread group
ThreadGroup tg = Thread.currentThread( ).getThreadGroup( );
// Find the root thread group
while (tg.getParent() != null) {
tg = tg.getParent();
}
int threadCountGuess = tg.activeCount() + 50;
Thread[] threads = new Thread[threadCountGuess];
int threadCountActual = tg.enumerate(threads);
// Make sure we don't miss any threads
while (threadCountActual == threadCountGuess) {
threadCountGuess *=2;
threads = new Thread[threadCountGuess];
// Note tg.enumerate(Thread[]) silently ignores any threads that
// can't fit into the array
threadCountActual = tg.enumerate(threads);
}
return threads;
}
/**
* This depends on the internals of the Sun JVM so it does everything by
* reflection.
*/
private void clearReferencesRmiTargets() {
try {
// Need access to the ccl field of sun.rmi.transport.Target
Class objectTargetClass =
Class.forName("sun.rmi.transport.Target");
Field cclField = objectTargetClass.getDeclaredField("ccl");
cclField.setAccessible(true);
// Clear the objTable map
Class objectTableClass =
Class.forName("sun.rmi.transport.ObjectTable");
Field objTableField = objectTableClass.getDeclaredField("objTable");
objTableField.setAccessible(true);
Object objTable = objTableField.get(null);
if (objTable == null) {
return;
}
// Iterate over the values in the table
if (objTable instanceof Map) {
Iterator iter = ((Map) objTable).values().iterator();
while (iter.hasNext()) {
Object obj = iter.next();
Object cclObject = cclField.get(obj);
if (this == cclObject) {
iter.remove();
}
}
}
// Clear the implTable map
Field implTableField = objectTableClass.getDeclaredField("implTable");
implTableField.setAccessible(true);
Object implTable = implTableField.get(null);
if (implTable == null) {
return;
}
// Iterate over the values in the table
if (implTable instanceof Map) {
Iterator iter = ((Map) implTable).values().iterator();
while (iter.hasNext()) {
Object obj = iter.next();
Object cclObject = cclField.get(obj);
if (this == cclObject) {
iter.remove();
}
}
}
} catch (ClassNotFoundException e) {
if (logger.isLoggable(Level.INFO)) {
logger.log(Level.INFO,
getString(LogFacade.CLEAR_RMI_INFO,
contextName), e);
}
} catch (SecurityException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CLEAR_RMI_FAIL,
contextName), e);
}
} catch (NoSuchFieldException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CLEAR_RMI_FAIL,
contextName), e);
}
} catch (IllegalArgumentException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CLEAR_RMI_FAIL,
contextName), e);
}
} catch (IllegalAccessException e) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING,
getString(LogFacade.CLEAR_RMI_FAIL,
contextName), e);
}
}
}
/**
* Clear the {@link ResourceBundle} cache of any bundles loaded by this
* class loader or any class loader where this loader is a parent class
* loader. Whilst {@link ResourceBundle#clearCache()} could be used there
* are complications around the
* {@link org.apache.jasper.servlet.JasperLoader} that mean a reflection
* based approach is more likely to be complete.
*
* The ResourceBundle is using WeakReferences so it shouldn't be pinning the
* class loader in memory. However, it is. Therefore clear ou the
* references.
*/
private void clearReferencesResourceBundles() {
// Get a reference to the cache
try {
Field cacheListField =
ResourceBundle.class.getDeclaredField("cacheList");
cacheListField.setAccessible(true);
// Java 6 uses ConcurrentMap
// Java 5 uses SoftCache extends Abstract Map
// So use Map and it *should* work with both
Map cacheList = (Map) cacheListField.get(null);
// Get the keys (loader references are in the key)
Set keys = cacheList.keySet();
Field loaderRefField = null;
// Iterate over the keys looking at the loader instances
Iterator keysIter = keys.iterator();
int countRemoved = 0;
while (keysIter.hasNext()) {
Object key = keysIter.next();
if (loaderRefField == null) {
loaderRefField =
key.getClass().getDeclaredField("loaderRef");
loaderRefField.setAccessible(true);
}
WeakReference loaderRef =
(WeakReference) loaderRefField.get(key);
//In case of JDK 9, java.logging loading sun.util.logging.resources.logging resource bundle and
// java.logging module is used as the cache key with null class loader.So we are adding a null check
if (loaderRef!=null){
ClassLoader loader = (ClassLoader) loaderRef.get();
while (loader != null && loader != this) {
loader = loader.getParent();
}
if (loader != null) {
keysIter.remove();
countRemoved++;
}
}
}
if (countRemoved > 0 && logger.isLoggable(Level.FINE)) {
logger.fine(getString(
LogFacade.CLEAR_REFERENCES_RESOURCE_BUNDLES_COUNT,
Integer.valueOf(countRemoved), contextName));
}
} catch (SecurityException e) {
logger.log(Level.SEVERE, getString(
LogFacade.CLEAR_REFERENCES_RESOURCE_BUNDLES_FAIL,
contextName), e);
} catch (NoSuchFieldException e) {
String msg = getString(
LogFacade.CLEAR_REFERENCES_RESOURCE_BUNDLES_FAIL, contextName);
if (System.getProperty("java.vendor").startsWith("Sun")) {
logger.log(Level.SEVERE, msg, e);
} else if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, msg, e);
}
} catch (IllegalArgumentException e) {
logger.log(Level.SEVERE, getString(
LogFacade.CLEAR_REFERENCES_RESOURCE_BUNDLES_FAIL,
contextName), e);
} catch (IllegalAccessException e) {
logger.log(Level.SEVERE, getString(
LogFacade.CLEAR_REFERENCES_RESOURCE_BUNDLES_FAIL,
contextName), e);
}
}
// ------------------------------------------------------ Protected Methods
/**
* Used to periodically signal to the classloader to release JAR resources.
*/
protected boolean openJARs() {
if (started && (jarFiles.length > 0)) {
synchronized (jarFilesLock) {
lastJarAccessed = System.currentTimeMillis();
if (jarFiles[0] == null) {
for (int i = 0; i < jarFiles.length; i++) {
try {
jarFiles[i] = new JarFile(jarRealFiles[i]);
} catch (IOException e) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Failed to open JAR", e);
}
for (int j = 0; j < i; j++) {
try {
jarFiles[j].close();
} catch (Throwable t) {
// Ignore
}
}
return false;
}
}
}
}
}
return true;
}
/**
* Find specified class in local repositories.
*
* @return the loaded class, or null if the class isn't found
*/
protected ResourceEntry findClassInternal(String name)
throws ClassNotFoundException {
if (!validate(name))
throw new ClassNotFoundException(name);
String tempPath = name.replace('.', '/');
String classPath = tempPath + ".class";
ResourceEntry entry = findResourceInternal(name, classPath);
if (entry == null)
throw new ClassNotFoundException(name);
synchronized (this) {
Class clazz = entry.loadedClass;
if (clazz != null)
return entry;
if (entry.binaryContent == null)
throw new ClassNotFoundException(name);
}
// Looking up the package
String packageName = null;
int pos = name.lastIndexOf('.');
if (pos != -1)
packageName = name.substring(0, pos);
Package pkg = null;
if (packageName != null) {
// START OF IASRI 4717252
synchronized (loaderPC) {
// END OF IASRI 4717252
pkg = getPackage(packageName);
// Define the package (if null)
if (pkg == null) {
if (entry.manifest == null) {
definePackage(packageName, null, null, null, null, null,
null, null);
} else {
definePackage(packageName, entry.manifest, entry.codeBase);
}
}
// START OF IASRI 4717252
}
// END OF IASRI 4717252
}
if (securityManager != null) {
// Checking sealing
if (pkg != null) {
boolean sealCheck = true;
if (pkg.isSealed()) {
sealCheck = pkg.isSealed(entry.codeBase);
} else {
sealCheck = (entry.manifest == null)
|| !isPackageSealed(packageName, entry.manifest);
}
if (!sealCheck)
throw new SecurityException
("Sealing violation loading " + name + " : Package "
+ packageName + " is sealed.");
}
}
return entry;
}
/**
* Find specified resource in local repositories. This block
* will execute under an AccessControl.doPrivilege block.
*
* @return the loaded resource, or null if the resource isn't found
*/
private ResourceEntry findResourceInternal(File file, String path){
ResourceEntry entry = new ResourceEntry();
try {
entry.source = getURI(new File(file, path));
entry.codeBase = getURL(new File(file, path));
} catch (MalformedURLException e) {
return null;
}
return entry;
}
/**
* Attempts to find the specified resource in local repositories.
*
* @return the loaded resource, or null if the resource isn't found
*/
protected ResourceEntry findResourceInternal(String name, String path) {
if (!started) {
throw new IllegalStateException(
getString(LogFacade.NOT_STARTED, name));
}
if ((name == null) || (path == null)) {
return null;
}
ResourceEntry entry = resourceEntries.get(name);
if (entry != null) {
return entry;
} else if (notFoundResources.containsKey(name)) {
return null;
}
entry = findResourceInternalFromRepositories(name, path);
if (entry == null) {
synchronized (jarFiles) {
entry = findResourceInternalFromJars(name, path);
}
}
if (entry == null) {
notFoundResources.put(name, name);
return null;
}
// Add the entry in the local resource repository
// Ensures that all the threads which may be in a race to load
// a particular class all end up with the same ResourceEntry
// instance
ResourceEntry entry2 = resourceEntries.putIfAbsent(name, entry);
if (entry2 != null) {
entry = entry2;
}
return entry;
}
/**
* Attempts to load the requested resource from this classloader's
* internal repositories.
*
* @return The requested resource, or null if not found
*/
private ResourceEntry findResourceInternalFromRepositories(String name,
String path) {
if (repositories == null) {
return null;
}
ResourceEntry entry = null;
int contentLength = -1;
InputStream binaryStream = null;
int repositoriesLength = repositories.length;
Resource resource = null;
for (int i=0; (entry == null) && (i < repositoriesLength); i++) {
try {
String fullPath = repositories[i] + path;
Object lookupResult = resources.lookup(fullPath);
if (lookupResult instanceof Resource) {
resource = (Resource) lookupResult;
}
// Note : Not getting an exception here means the resource was
// found
if (securityManager != null) {
PrivilegedAction dp =
new PrivilegedFindResource(files[i], path);
entry = AccessController.doPrivileged(dp);
} else {
entry = findResourceInternal(files[i], path);
}
ResourceAttributes attributes =
(ResourceAttributes) resources.getAttributes(fullPath);
contentLength = (int) attributes.getContentLength();
entry.lastModified = attributes.getLastModified();
if (resource != null) {
try {
binaryStream = resource.streamContent();
} catch (IOException e) {
return null;
}
// Register the full path for modification checking
// Note: Only syncing on a 'constant' object is needed
synchronized (ALL_PERMISSION) {
int j;
long[] result2 =
new long[lastModifiedDates.length + 1];
for (j = 0; j < lastModifiedDates.length; j++) {
result2[j] = lastModifiedDates[j];
}
result2[lastModifiedDates.length] = entry.lastModified;
lastModifiedDates = result2;
String[] result = new String[paths.length + 1];
for (j = 0; j < paths.length; j++) {
result[j] = paths[j];
}
result[paths.length] = fullPath;
paths = result;
}
}
} catch (NamingException e) {
}
}
if (entry != null) {
readEntryData(entry, name, binaryStream, contentLength, null);
}
return entry;
}
/**
* Attempts to load the requested resource from this classloader's
* JAR files.
*
* @return The requested resource, or null if not found
*/
private ResourceEntry findResourceInternalFromJars(String name,
String path) {
ResourceEntry entry = null;
JarEntry jarEntry = null;
int contentLength = -1;
InputStream binaryStream = null;
if (!openJARs()){
return null;
}
int jarFilesLength = jarFiles.length;
for (int i=0; (entry == null) && (i < jarFilesLength); i++) {
jarEntry = jarFiles[i].getJarEntry(path);
if (jarEntry != null) {
entry = new ResourceEntry();
try {
entry.codeBase = getURL(jarRealFiles[i]);
String jarFakeUrl = getURI(jarRealFiles[i]).toString();
jarFakeUrl = "jar:" + jarFakeUrl + "!/" + path;
entry.source = new URL(jarFakeUrl);
entry.lastModified = jarRealFiles[i].lastModified();
} catch (MalformedURLException e) {
return null;
}
contentLength = (int) jarEntry.getSize();
try {
entry.manifest = jarFiles[i].getManifest();
binaryStream = jarFiles[i].getInputStream(jarEntry);
} catch (IOException e) {
return null;
}
// Extract resources contained in JAR to the workdir
if (antiJARLocking && !(path.endsWith(".class"))) {
File resourceFile = new File
(loaderDir, jarEntry.getName());
if (!resourceFile.exists()) {
extractResources();
}
}
}
}
if (entry != null) {
readEntryData(entry, name, binaryStream, contentLength, jarEntry);
}
return entry;
}
private synchronized void extractResources() {
if (!antiJARLocking || resourcesExtracted) {
return;
}
for (int i = jarFiles.length - 1; i >= 0; i--) {
extractResource(jarFiles[i]);
}
resourcesExtracted = true;
}
private void extractResource(JarFile jarFile) {
byte[] buf = new byte[1024];
Enumeration entries = jarFile.entries();
while (entries.hasMoreElements()) {
JarEntry jarEntry2 = entries.nextElement();
if (!(jarEntry2.isDirectory())
&& (!jarEntry2.getName().endsWith(".class"))) {
File resourceFile = new File
(loaderDir, jarEntry2.getName());
try {
if (!resourceFile.getCanonicalPath().startsWith(
canonicalLoaderDir)) {
throw new IllegalArgumentException(getString(
LogFacade.ILLEGAL_JAR_PATH, jarEntry2.getName()));
}
} catch (IOException ioe) {
throw new IllegalArgumentException(getString(
LogFacade.VALIDATION_ERROR_JAR_PATH, jarEntry2.getName(), ioe));
}
if (!FileUtils.mkdirsMaybe(resourceFile.getParentFile())) {
logger.log(Level.WARNING,
LogFacade.UNABLE_TO_CREATE,
resourceFile.getParentFile().toString());
}
FileOutputStream os = null;
InputStream is = null;
try {
is = jarFile.getInputStream(jarEntry2);
os = new FileOutputStream(resourceFile);
while (true) {
int n = is.read(buf);
if (n <= 0) {
break;
}
os.write(buf, 0, n);
}
} catch (IOException e) {
// Ignore
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
}
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
}
}
}
}
}
public File getExtractedResourcePath(String path) {
extractResources();
File extractedResource = new File(loaderDir, path);
return (extractedResource.exists() ? extractedResource : null);
}
/**
* Reads the resource's binary data from the given input stream.
*/
private void readEntryData(ResourceEntry entry,
String name,
InputStream binaryStream,
int contentLength,
JarEntry jarEntry) {
if (binaryStream == null) {
return;
}
byte[] binaryContent = new byte[contentLength];
try {
int pos = 0;
while (true) {
int n = binaryStream.read(binaryContent, pos,
binaryContent.length - pos);
if (n <= 0)
break;
pos += n;
}
} catch (Exception e) {
logger.log(Level.WARNING, getString(LogFacade.READ_CLASS_ERROR, name), e);
return;
} finally {
try {
binaryStream.close();
} catch(IOException e) {
}
}
// START OF IASRI 4709374
// Preprocess the loaded byte code if bytecode preprocesser is
// enabled
if (PreprocessorUtil.isPreprocessorEnabled()) {
binaryContent =
PreprocessorUtil.processClass(name, binaryContent);
}
// END OF IASRI 4709374
entry.binaryContent = binaryContent;
// The certificates are only available after the JarEntry
// associated input stream has been fully read
if (jarEntry != null) {
entry.certificates = jarEntry.getCertificates();
}
}
/**
* Returns true if the specified package name is sealed according to the
* given manifest.
*/
protected boolean isPackageSealed(String name, Manifest man) {
String path = name.replace('.', '/') + '/';
Attributes attr = man.getAttributes(path);
String sealed = null;
if (attr != null) {
sealed = attr.getValue(Name.SEALED);
}
if (sealed == null) {
if ((attr = man.getMainAttributes()) != null) {
sealed = attr.getValue(Name.SEALED);
}
}
return "true".equalsIgnoreCase(sealed);
}
/**
* Finds the resource with the given name if it has previously been
* loaded and cached by this class loader, and return an input stream
* to the resource data. If this resource has not been cached, return
* null.
*
* @param name Name of the resource to return
*/
protected InputStream findLoadedResource(String name) {
ResourceEntry entry = resourceEntries.get(name);
if (entry != null) {
if (entry.binaryContent != null)
return new ByteArrayInputStream(entry.binaryContent);
}
return (null);
}
/**
* Finds the class with the given name if it has previously been
* loaded and cached by this class loader, and return the Class object.
* If this class has not been cached, return null.
*
* @param name Name of the resource to return
*/
protected Class findLoadedClass0(String name) {
ResourceEntry entry = resourceEntries.get(name);
if (entry != null) {
synchronized(this) {
return entry.loadedClass;
}
}
return (null); // FIXME - findLoadedResource()
}
/**
* Refresh the system policy file, to pick up eventual changes.
*/
protected void refreshPolicy() {
try {
// The policy file may have been modified to adjust
// permissions, so we're reloading it when loading or
// reloading a Context
Policy policy = Policy.getPolicy();
policy.refresh();
} catch (AccessControlException e) {
// Some policy files may restrict this, even for the core,
// so this exception is ignored
}
}
/**
* Filter classes.
*
* @param name class name
* @return true if the class should be filtered
*/
protected boolean filter(String name) {
if (name == null)
return false;
// START PE 4985680
// Special case for performance reason.
if (name.startsWith("java."))
return true;
// END PE 4985680
// Looking up the package
String packageName = null;
int pos = name.lastIndexOf('.');
if (pos != -1)
packageName = name.substring(0, pos);
else
return false;
if (overridablePackages != null){
for (String overridePkg : overridablePackages) {
if (packageName.startsWith(overridePkg))
return false;
}
}
for (int i = 0; i < packageTriggers.length; i++) {
if (packageName.startsWith(packageTriggers[i]))
return true;
}
return false;
}
/**
* Validate a classname. As per SRV.9.7.2, we must restrict loading of
* classes from J2SE (java.*) and classes of the servlet API
* (javax.servlet.*). That should enhance robustness and prevent a number
* of user error (where an older version of servlet.jar would be present
* in /WEB-INF/lib).
*
* @param name class name
* @return true if the name is valid
*/
protected boolean validate(String name) {
if (name == null)
return false;
if (name.startsWith("java."))
return false;
return true;
}
/**
* Get URL.
*/
protected URL getURL(File file)
throws MalformedURLException {
File realFile = file;
try {
realFile = realFile.getCanonicalFile();
} catch (IOException e) {
// Ignore
}
return realFile.toURI().toURL();
}
/**
* Get URL.
*/
protected URL getURI(File file)
throws MalformedURLException {
try {
file = file.getCanonicalFile();
} catch (IOException e) {
// Ignore
}
return file.toURI().toURL();
}
/**
* Delete the specified directory, including all of its contents and
* subdirectories recursively.
*
* @param dir File object representing the directory to be deleted
*/
protected static void deleteDir(File dir) {
String files[] = dir.list();
if (files == null) {
files = new String[0];
}
for (int i = 0; i < files.length; i++) {
File file = new File(dir, files[i]);
if (file.isDirectory()) {
deleteDir(file);
} else {
if (!FileUtils.deleteFileMaybe(file)) {
logger.log(Level.WARNING,
LogFacade.UNABLE_TO_DELETE,
file.toString());
}
}
}
if (!FileUtils.deleteFileMaybe(dir)) {
logger.log(Level.WARNING,
LogFacade.UNABLE_TO_DELETE,
dir.toString());
}
}
// START SJSAS 6344989
public void addByteCodePreprocessor(BytecodePreprocessor preprocessor) {
byteCodePreprocessors.add(preprocessor);
}
// END SJSAS 6344989
// START GlassFish Issue 587
/*
* Purges all bean classes that were loaded by this WebappClassLoader
* from the caches maintained by javax.el.BeanELResolver, in order to
* avoid this WebappClassLoader from leaking.
*/
private void purgeELBeanClasses() {
Field fieldlist[] = javax.el.BeanELResolver.class.getDeclaredFields();
for (int i = 0; i < fieldlist.length; i++) {
Field fld = fieldlist[i];
if (fld.getName().equals("properties")) {
purgeELBeanClasses(fld);
break;
}
}
}
/*
* Purges all bean classes that were loaded by this WebappClassLoader
* from the cache represented by the given reflected field.
*
* @param fld The reflected field from which to remove the bean classes
* that were loaded by this WebappClassLoader
*/
private void purgeELBeanClasses(final Field fld) {
setAccessible(fld);
Map m = null;
try {
m = getBeanELResolverProperties(fld);
} catch (IllegalAccessException iae) {
logger.log(Level.WARNING, LogFacade.UNABLE_PURGE_BEAN_CLASSES, iae);
return;
}
if (m.size() == 0) {
return;
}
Iterator iter = m.keySet().iterator();
while (iter.hasNext()) {
Class mbeanClass = iter.next();
if (this.equals(mbeanClass.getClassLoader())) {
iter.remove();
}
}
}
@SuppressWarnings("unchecked")
private static Map getBeanELResolverProperties(Field fld) throws IllegalAccessException {
return (Map)fld.get(null);
}
// END GlassFish Issue 587
/**
* Create and return a temporary loader with the same visibility
* as this loader. The temporary loader may be used to load
* resources or any other application classes for the purposes of
* introspecting them for annotations. The persistence provider
* should not maintain any references to the temporary loader,
* or any objects loaded by it.
*
* @return A temporary classloader with the same classpath as this loader
*/
public ClassLoader copy() {
logger.entering("WebModuleListener$InstrumentableWebappClassLoader", "copy");
// set getParent() as the parent of the cloned class loader
return AccessController.doPrivileged(new PrivilegedAction() {
@Override
public URLClassLoader run() {
return new URLClassLoader(getURLs(), getParent());
}
});
}
/**
* Add a new ClassFileTransformer to this class loader. This transfomer should be called for
* each class loading event.
*
* @param transformer new class file transformer to do byte code enhancement.
*/
public void addTransformer(final ClassFileTransformer transformer) {
final WebappClassLoader cl = this;
addByteCodePreprocessor(new BytecodePreprocessor(){
/*
* This class adapts ClassFileTransformer to ByteCodePreprocessor that
* is used inside WebappClassLoader.
*/
public boolean initialize(Hashtable parameters) {
return true;
}
public byte[] preprocess(String resourceName, byte[] classBytes) {
try {
// convert java/lang/Object.class to java/lang/Object
String classname = resourceName.substring(0,
resourceName.length() - 6); // ".class" size = 6
byte[] newBytes = transformer.transform(
cl, classname, null, null, classBytes);
// ClassFileTransformer returns null if no transformation
// took place, where as ByteCodePreprocessor is expected
// to return non-null byte array.
return newBytes == null ? classBytes : newBytes;
} catch (IllegalClassFormatException e) {
logger.logp(Level.WARNING,
"WebModuleListener$InstrumentableClassLoader$BytecodePreprocessor",
"preprocess", e.getMessage());
throw new RuntimeException(e);
}
}
});
}
private String getJavaVersion() {
String version = null;
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
version = AccessController.doPrivileged(
new PrivilegedAction() {
public String run() {
return System.getProperty("java.version");
}
});
} else {
version = System.getProperty("java.version");
}
return version;
}
private void setAccessible(final Field field) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
AccessController.doPrivileged(new PrivilegedAction() {
public Void run() {
field.setAccessible(true);
return null;
}
});
} else {
field.setAccessible(true);
}
}
/**
* To determine whether one should delegate to parent for loading
* resource of the given resource name.
*
* @param name
*/
private boolean isResourceDelegate(String name) {
return (delegate
|| (name.startsWith("javax") &&
(!name.startsWith("javax.faces") || !useMyFaces))
|| name.startsWith("sun")
|| (name.startsWith("com/sun/faces") &&
!name.startsWith("com/sun/faces/extensions") &&
!useMyFaces)
|| name.startsWith("org/apache/taglibs/standard"));
}
private static String getString(String key, Object ... arguments) {
String msg = rb.getString(key);
return MessageFormat.format(msg, arguments);
}
}