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//Portions Copyright [2016-2017] [Payara Foundation and/or its affiliates]
package org.glassfish.internal.deployment;
import com.sun.enterprise.module.ModulesRegistry;
import com.sun.enterprise.module.ModuleDefinition;
import com.sun.enterprise.module.Module;
import java.io.ByteArrayOutputStream;
import javax.inject.Inject;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.XMLEvent;
import org.glassfish.api.container.Sniffer;
import org.glassfish.api.deployment.DeploymentContext;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.api.deployment.archive.ArchiveType;
import org.glassfish.hk2.api.ServiceLocator;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.lang.annotation.Annotation;
import javax.xml.stream.events.StartDocument;
/**
* Generic implementation of the Sniffer service that can be programmatically instantiated
*
* @author Jerome Dochez, Sanjeeb Sahoo
*/
public abstract class GenericSniffer implements Sniffer {
@Inject
protected ModulesRegistry modulesRegistry;
@Inject
protected ServiceLocator habitat;
final private String containerName;
final private String appStigma;
final private String urlPattern;
final private static XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
private Module[] modules;
public GenericSniffer(String containerName, String appStigma, String urlPattern) {
this.containerName = containerName;
this.appStigma = appStigma;
this.urlPattern = urlPattern;
}
/**
* Returns true if the passed file or directory is recognized by this
* composite sniffer.
* @param context deployment context
* @return true if the location is recognized by this sniffer
*/
public boolean handles(DeploymentContext context) {
ArchiveType archiveType = habitat.getService(ArchiveType.class, context.getArchiveHandler().getArchiveType());
if (archiveType != null && !supportsArchiveType(archiveType)) {
return false;
}
if(archiveType != null) {
context.getSource().setExtraData(ArchiveType.class, archiveType);
}
return handles(context.getSource());
}
/**
* Returns the list of annotation names that this sniffer is interested in.
* If an application bundle contains at least one class annotated with
* one of the returned annotations, the deployment process will not
* call the handles method but will invoke the containers deployers as if
* the handles method had been called and returned true.
*
* @param context deployment context
* @return list of annotations this sniffer is interested in or an empty array
*/
public String[] getAnnotationNames(DeploymentContext context) {
List annotationNames = new ArrayList();
for (Class annotationType : getAnnotationTypes()) {
annotationNames.add(annotationType.getName());
}
return annotationNames.toArray(new String[annotationNames.size()]);
}
/**
* Returns true if the passed file or directory is recognized by this
* instance.
*
* @param location the file or directory to explore
* @return true if this sniffer handles this application type
*/
public boolean handles(ReadableArchive location) {
if (appStigma != null) {
try {
if (location.exists(appStigma)) {
return true;
}
} catch (IOException e) {
// ignore
}
}
return false;
}
/**
* Returns the pattern to apply against the request URL
* If the pattern matches the URL, the service method of the associated
* container will be invoked
*
* @return pattern instance
*/
public String[] getURLPatterns() {
if (urlPattern!=null) {
return new String[] {urlPattern};
} else {
return null;
}
}
/**
* Returns the container name associated with this sniffer
*
* @return the container name
*/
public String getModuleType() {
return containerName;
}
/**
* Sets up the container libraries so that any imported bundle from the
* connector jar file will now be known to the module subsystem
*
* This method returns a {@link ModuleDefinition} for the module containing
* the core implementation of the container. That means that this module
* will be locked as long as there is at least one module loaded in the
* associated container.
*
* @param containerHome is where the container implementation resides (Not used anymore)
* @param logger the logger to use
* @return the module definition of the core container implementation.
*
* @throws java.io.IOException exception if something goes sour
*/
public synchronized Module[] setup(String containerHome, Logger logger) throws IOException { // TODO(Sahoo): Change signature to not accept containerHome or logger
if (modules != null) {
if (logger.isLoggable(Level.FINE)) {
logger.logp(Level.FINE, "GenericSniffer", "setup", "{0} has already setup {1} container, so just returning.", new Object[]{this, containerName});
}
return modules;
}
List tmp = new ArrayList();
for (String moduleName : getContainerModuleNames()) {
Module m = modulesRegistry.makeModuleFor(moduleName, null);
if (m != null) {
tmp.add(m);
} else {
throw new RuntimeException("Unable to set up module " + moduleName);
}
}
modules = tmp.toArray(new Module[tmp.size()]);
return modules;
}
protected String[] getContainerModuleNames() {
return new String[0];
}
/**
* Tears down a container, remove all imported libraries from the module
* subsystem.
*
*/
public void tearDown() {
// It is not safe to uninstall modules in a running server as there might be existing
// references to objects loaded from those modules, so we don't uninstall modules at this point of time.
}
/**
* Returns the list of annotations types that this sniffer is interested in.
* If an application bundle contains at least one class annotated with
* one of the returned annotations, the deployment process will not
* call the handles method but will invoke the containers deployers as if
* the handles method had been called and returned true.
*
* @return list of annotations this sniffer is interested in.
*/
public Class[] getAnnotationTypes() {
return new Class[0];
}
/**
* @return whether this sniffer should be visible to user
*
*/
public boolean isUserVisible() {
return false;
}
/**
* @return whether this sniffer represents a Java EE container type
*
*/
public boolean isJavaEE() {
return false;
}
@Override
public boolean equals(Object other) {
if (other instanceof Sniffer) {
Sniffer otherSniffer = (Sniffer)other;
return getModuleType().equals(otherSniffer.getModuleType());
}
return false;
}
@Override
public int hashCode() {
int hash = 5;
hash = 71 * hash + (getModuleType() != null ? getModuleType().hashCode() : 0);
return hash;
}
/**
* Returns a map of deployment configurations composed by reading from a
* list of paths in the readable archive. (For Java EE applications the
* deployment configurations correspond to the deployment descriptors.) The
* {@link #getDeploymentConfigurationPaths} method returns this list of paths
* which might exist in archives that this sniffer handles.
*
* In each returned map entry the key is a path and the value is the
* contents of the archive entry at that path. This method creates a map
* entry only if the path exists in the readable archive.
*
* Sniffers for applications that do not store their configurations as
* deployment descriptors at predictable paths within an archive are free
* to override this implementation to return whatever information is
* appropriate to that application type. A key usage of the returned
* Map is in the application type's GUI plug-in (if desired) to allow
* users to customize the deployment configuration after the application
* has been deployed. The concrete Sniffer implementation and the
* GUI plug-in must agree on the conventions for storing deployment
* configuration inforation in the Map.
*
* @param location the readable archive for the application of interest
* @return a map from path names to the contents of the archive entries
* at those paths
* @throws java.io.IOException in case of errors retrieving an entry or
* reading the archive contents at an entry
*/
public Map getDeploymentConfigurations(final ReadableArchive location) throws IOException {
final Map deploymentConfigs = new HashMap();
for (String path : getDeploymentConfigurationPaths()) {
InputStream is = null;
try {
is = location.getEntry(path);
if (is != null) {
String dc = readDeploymentConfig(is);
deploymentConfigs.put(path, dc);
}
} finally {
if (is != null) {
is.close();
}
}
}
return deploymentConfigs;
}
/**
* Returns a list of paths within an archive that represents deployment
* configuration files.
*
* Sniffers that recognize Java EE applications typically override this
* default implementation to return a list of the deployment descriptors
* that might appear in the type of Java EE application which the sniffer
* recognizes. For example, the WebSniffer implementation of this method
* returns WEB-INF/web.xml, WEB-INF/glassfish-web.xml and
* WEB-INF/sun-web.xml.
*
* @return list of paths in the archive where deployment configuration
* archive entries might exist
*/
protected List getDeploymentConfigurationPaths() {
return Collections.EMPTY_LIST;
}
/**
* @return the set of the sniffers that should not co-exist for the
* same module. For example, ejb and appclient sniffers should not
* be returned in the sniffer list for a certain module.
* This method will be used to validate and filter the retrieved sniffer
* lists for a certain module
*
*/
public String[] getIncompatibleSnifferTypes() {
return null;
}
private String readDeploymentConfig(final InputStream is) throws IOException {
String encoding = null;
XMLEventReader rdr = null;
try {
is.mark(Integer.MAX_VALUE);
rdr = xmlInputFactory.createXMLEventReader(
new InputStreamReader(is));
while (rdr.hasNext()) {
final XMLEvent ev = rdr.nextEvent();
if (ev.isStartDocument()) {
final StartDocument sd = (StartDocument) ev;
encoding = sd.getCharacterEncodingScheme();
break;
}
}
} catch (XMLStreamException e) {
if (rdr != null) {
try {
rdr.close();
} catch (XMLStreamException inner) {
throw new IOException(e);
}
}
throw new IOException(e);
}
if (encoding == null) {
encoding = "UTF-8";
}
is.reset();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int bytesRead;
final byte [] buffer = new byte[1024];
while (( bytesRead = is.read(buffer)) != -1 ) {
baos.write(buffer, 0, bytesRead);
}
try {
rdr.close();
} catch (XMLStreamException ex) {
throw new IOException(ex);
}
is.close();
return new String(baos.toByteArray(), encoding);
}
}