org.apache.catalina.startup.HostConfig Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina.startup;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.Files;
import java.security.CodeSource;
import java.security.Permission;
import java.security.PermissionCollection;
import java.security.Policy;
import java.security.cert.Certificate;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.management.ObjectName;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.DistributedManager;
import org.apache.catalina.Globals;
import org.apache.catalina.Host;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Manager;
import org.apache.catalina.core.StandardContext;
import org.apache.catalina.core.StandardHost;
import org.apache.catalina.security.DeployXmlPermission;
import org.apache.catalina.util.ContextName;
import org.apache.catalina.util.IOTools;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.buf.UriUtil;
import org.apache.tomcat.util.digester.Digester;
import org.apache.tomcat.util.modeler.Registry;
import org.apache.tomcat.util.res.StringManager;
/**
* Startup event listener for a Host that configures the properties
* of that Host, and the associated defined contexts.
*
* @author Craig R. McClanahan
* @author Remy Maucherat
*/
public class HostConfig implements LifecycleListener {
private static final Log log = LogFactory.getLog(HostConfig.class);
/**
* The string resources for this package.
*/
protected static final StringManager sm = StringManager.getManager(HostConfig.class);
/**
* The resolution, in milliseconds, of file modification times.
*/
protected static final long FILE_MODIFICATION_RESOLUTION_MS = 1000;
// ----------------------------------------------------- Instance Variables
/**
* The Java class name of the Context implementation we should use.
*/
protected String contextClass = "org.apache.catalina.core.StandardContext";
/**
* The Host we are associated with.
*/
protected Host host = null;
/**
* The JMX ObjectName of this component.
*/
protected ObjectName oname = null;
/**
* Should we deploy XML Context config files packaged with WAR files and
* directories?
*/
protected boolean deployXML = false;
/**
* Should XML files be copied to
* $CATALINA_BASE/conf/<engine>/<host> by default when
* a web application is deployed?
*/
protected boolean copyXML = false;
/**
* Should we unpack WAR files when auto-deploying applications in the
* appBase directory?
*/
protected boolean unpackWARs = false;
/**
* Map of deployed applications.
*/
protected final Map deployed =
new ConcurrentHashMap<>();
/**
* List of applications which are being serviced, and shouldn't be
* deployed/undeployed/redeployed at the moment.
*/
protected final ArrayList serviced = new ArrayList<>();
/**
* The Digester instance used to parse context descriptors.
*/
protected Digester digester = createDigester(contextClass);
private final Object digesterLock = new Object();
/**
* The list of Wars in the appBase to be ignored because they are invalid
* (e.g. contain /../ sequences).
*/
protected final Set invalidWars = new HashSet<>();
// ------------------------------------------------------------- Properties
/**
* @return the Context implementation class name.
*/
public String getContextClass() {
return this.contextClass;
}
/**
* Set the Context implementation class name.
*
* @param contextClass The new Context implementation class name.
*/
public void setContextClass(String contextClass) {
String oldContextClass = this.contextClass;
this.contextClass = contextClass;
if (!oldContextClass.equals(contextClass)) {
synchronized (digesterLock) {
digester = createDigester(getContextClass());
}
}
}
/**
* @return the deploy XML config file flag for this component.
*/
public boolean isDeployXML() {
return this.deployXML;
}
/**
* Set the deploy XML config file flag for this component.
*
* @param deployXML The new deploy XML flag
*/
public void setDeployXML(boolean deployXML) {
this.deployXML = deployXML;
}
private boolean isDeployThisXML(File docBase, ContextName cn) {
boolean deployThisXML = isDeployXML();
if (Globals.IS_SECURITY_ENABLED && !deployThisXML) {
// When running under a SecurityManager, deployXML may be overridden
// on a per Context basis by the granting of a specific permission
Policy currentPolicy = Policy.getPolicy();
if (currentPolicy != null) {
URL contextRootUrl;
try {
contextRootUrl = docBase.toURI().toURL();
CodeSource cs = new CodeSource(contextRootUrl, (Certificate[]) null);
PermissionCollection pc = currentPolicy.getPermissions(cs);
Permission p = new DeployXmlPermission(cn.getBaseName());
if (pc.implies(p)) {
deployThisXML = true;
}
} catch (MalformedURLException e) {
// Should never happen
log.warn(sm.getString("hostConfig.docBaseUrlInvalid"), e);
}
}
}
return deployThisXML;
}
/**
* @return the copy XML config file flag for this component.
*/
public boolean isCopyXML() {
return this.copyXML;
}
/**
* Set the copy XML config file flag for this component.
*
* @param copyXML The new copy XML flag
*/
public void setCopyXML(boolean copyXML) {
this.copyXML= copyXML;
}
/**
* @return the unpack WARs flag.
*/
public boolean isUnpackWARs() {
return this.unpackWARs;
}
/**
* Set the unpack WARs flag.
*
* @param unpackWARs The new unpack WARs flag
*/
public void setUnpackWARs(boolean unpackWARs) {
this.unpackWARs = unpackWARs;
}
// --------------------------------------------------------- Public Methods
/**
* Process the START event for an associated Host.
*
* @param event The lifecycle event that has occurred
*/
@Override
public void lifecycleEvent(LifecycleEvent event) {
// Identify the host we are associated with
try {
host = (Host) event.getLifecycle();
if (host instanceof StandardHost) {
setCopyXML(((StandardHost) host).isCopyXML());
setDeployXML(((StandardHost) host).isDeployXML());
setUnpackWARs(((StandardHost) host).isUnpackWARs());
setContextClass(((StandardHost) host).getContextClass());
}
} catch (ClassCastException e) {
log.error(sm.getString("hostConfig.cce", event.getLifecycle()), e);
return;
}
// Process the event that has occurred
if (event.getType().equals(Lifecycle.PERIODIC_EVENT)) {
check();
} else if (event.getType().equals(Lifecycle.BEFORE_START_EVENT)) {
beforeStart();
} else if (event.getType().equals(Lifecycle.START_EVENT)) {
start();
} else if (event.getType().equals(Lifecycle.STOP_EVENT)) {
stop();
}
}
/**
* Add a serviced application to the list.
* @param name the context name
*/
public synchronized void addServiced(String name) {
serviced.add(name);
}
/**
* Is application serviced ?
* @param name the context name
* @return state of the application
*/
public synchronized boolean isServiced(String name) {
return serviced.contains(name);
}
/**
* Removed a serviced application from the list.
* @param name the context name
*/
public synchronized void removeServiced(String name) {
serviced.remove(name);
}
/**
* Get the instant where an application was deployed.
* @param name the context name
* @return 0L if no application with that name is deployed, or the instant
* on which the application was deployed
*/
public long getDeploymentTime(String name) {
DeployedApplication app = deployed.get(name);
if (app == null) {
return 0L;
}
return app.timestamp;
}
/**
* Has the specified application been deployed? Note applications defined
* in server.xml will not have been deployed.
* @param name the context name
* @return true if the application has been deployed and
* false if the application has not been deployed or does not
* exist
*/
public boolean isDeployed(String name) {
return deployed.containsKey(name);
}
// ------------------------------------------------------ Protected Methods
/**
* Create the digester which will be used to parse context config files.
* @param contextClassName The class which will be used to create the
* context instance
* @return the digester
*/
protected static Digester createDigester(String contextClassName) {
Digester digester = new Digester();
digester.setValidating(false);
// Add object creation rule
digester.addObjectCreate("Context", contextClassName, "className");
// Set the properties on that object (it doesn't matter if extra
// properties are set)
digester.addSetProperties("Context");
return digester;
}
protected File returnCanonicalPath(String path) {
File file = new File(path);
if (!file.isAbsolute())
file = new File(host.getCatalinaBase(), path);
try {
return file.getCanonicalFile();
} catch (IOException e) {
return file;
}
}
/**
* Get the name of the configBase.
* For use with JMX management.
* @return the config base
*/
public String getConfigBaseName() {
return host.getConfigBaseFile().getAbsolutePath();
}
/**
* Deploy applications for any directories or WAR files that are found
* in our "application root" directory.
*/
protected void deployApps() {
File appBase = host.getAppBaseFile();
File configBase = host.getConfigBaseFile();
String[] filteredAppPaths = filterAppPaths(appBase.list());
// Deploy XML descriptors from configBase
deployDescriptors(configBase, configBase.list());
// Deploy WARs
deployWARs(appBase, filteredAppPaths);
// Deploy expanded folders
deployDirectories(appBase, filteredAppPaths);
}
/**
* Filter the list of application file paths to remove those that match
* the regular expression defined by {@link Host#getDeployIgnore()}.
*
* @param unfilteredAppPaths The list of application paths to filter
*
* @return The filtered list of application paths
*/
protected String[] filterAppPaths(String[] unfilteredAppPaths) {
Pattern filter = host.getDeployIgnorePattern();
if (filter == null || unfilteredAppPaths == null) {
return unfilteredAppPaths;
}
List filteredList = new ArrayList<>();
Matcher matcher = null;
for (String appPath : unfilteredAppPaths) {
if (matcher == null) {
matcher = filter.matcher(appPath);
} else {
matcher.reset(appPath);
}
if (matcher.matches()) {
if (log.isDebugEnabled()) {
log.debug(sm.getString("hostConfig.ignorePath", appPath));
}
} else {
filteredList.add(appPath);
}
}
return filteredList.toArray(new String[filteredList.size()]);
}
/**
* Deploy applications for any directories or WAR files that are found
* in our "application root" directory.
* @param name The context name which should be deployed
*/
protected void deployApps(String name) {
File appBase = host.getAppBaseFile();
File configBase = host.getConfigBaseFile();
ContextName cn = new ContextName(name, false);
String baseName = cn.getBaseName();
if (deploymentExists(cn.getName())) {
return;
}
// Deploy XML descriptor from configBase
File xml = new File(configBase, baseName + ".xml");
if (xml.exists()) {
deployDescriptor(cn, xml);
return;
}
// Deploy WAR
File war = new File(appBase, baseName + ".war");
if (war.exists()) {
deployWAR(cn, war);
return;
}
// Deploy expanded folder
File dir = new File(appBase, baseName);
if (dir.exists())
deployDirectory(cn, dir);
}
/**
* Deploy XML context descriptors.
* @param configBase The config base
* @param files The XML descriptors which should be deployed
*/
protected void deployDescriptors(File configBase, String[] files) {
if (files == null)
return;
ExecutorService es = host.getStartStopExecutor();
List> results = new ArrayList<>();
for (int i = 0; i < files.length; i++) {
File contextXml = new File(configBase, files[i]);
if (files[i].toLowerCase(Locale.ENGLISH).endsWith(".xml")) {
ContextName cn = new ContextName(files[i], true);
if (isServiced(cn.getName()) || deploymentExists(cn.getName()))
continue;
results.add(
es.submit(new DeployDescriptor(this, cn, contextXml)));
}
}
for (Future result : results) {
try {
result.get();
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployDescriptor.threaded.error"), e);
}
}
}
/**
* Deploy specified context descriptor.
* @param cn The context name
* @param contextXml The descriptor
*/
@SuppressWarnings("null") // context is not null
protected void deployDescriptor(ContextName cn, File contextXml) {
DeployedApplication deployedApp =
new DeployedApplication(cn.getName(), true);
long startTime = 0;
// Assume this is a configuration descriptor and deploy it
if(log.isInfoEnabled()) {
startTime = System.currentTimeMillis();
log.info(sm.getString("hostConfig.deployDescriptor",
contextXml.getAbsolutePath()));
}
Context context = null;
boolean isExternalWar = false;
boolean isExternal = false;
File expandedDocBase = null;
try (FileInputStream fis = new FileInputStream(contextXml)) {
synchronized (digesterLock) {
try {
context = (Context) digester.parse(fis);
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployDescriptor.error",
contextXml.getAbsolutePath()), e);
} finally {
digester.reset();
if (context == null) {
context = new FailedContext();
}
}
}
if (context.getPath() != null) {
log.warn(sm.getString("hostConfig.deployDescriptor.path", context.getPath(),
contextXml.getAbsolutePath()));
}
Class clazz = Class.forName(host.getConfigClass());
LifecycleListener listener = (LifecycleListener) clazz.getConstructor().newInstance();
context.addLifecycleListener(listener);
context.setConfigFile(contextXml.toURI().toURL());
context.setName(cn.getName());
context.setPath(cn.getPath());
context.setWebappVersion(cn.getVersion());
// Add the associated docBase to the redeployed list if it's a WAR
if (context.getDocBase() != null) {
File docBase = new File(context.getDocBase());
if (!docBase.isAbsolute()) {
docBase = new File(host.getAppBaseFile(), context.getDocBase());
}
// If external docBase, register .xml as redeploy first
if (!docBase.getCanonicalPath().startsWith(
host.getAppBaseFile().getAbsolutePath() + File.separator)) {
isExternal = true;
deployedApp.redeployResources.put(
contextXml.getAbsolutePath(),
Long.valueOf(contextXml.lastModified()));
deployedApp.redeployResources.put(docBase.getAbsolutePath(),
Long.valueOf(docBase.lastModified()));
if (docBase.getAbsolutePath().toLowerCase(Locale.ENGLISH).endsWith(".war")) {
isExternalWar = true;
}
// Check that a WAR or DIR in the appBase is not 'hidden'
File war = new File(host.getAppBaseFile(), cn.getBaseName() + ".war");
if (war.exists()) {
log.warn(sm.getString("hostConfig.deployDescriptor.hiddenWar",
contextXml.getAbsolutePath(), war.getAbsolutePath()));
}
File dir = new File(host.getAppBaseFile(), cn.getBaseName());
if (dir.exists()) {
log.warn(sm.getString("hostConfig.deployDescriptor.hiddenDir",
contextXml.getAbsolutePath(), dir.getAbsolutePath()));
}
} else {
log.warn(sm.getString("hostConfig.deployDescriptor.localDocBaseSpecified",
docBase));
// Ignore specified docBase
context.setDocBase(null);
}
}
host.addChild(context);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("hostConfig.deployDescriptor.error",
contextXml.getAbsolutePath()), t);
} finally {
// Get paths for WAR and expanded WAR in appBase
// default to appBase dir + name
expandedDocBase = new File(host.getAppBaseFile(), cn.getBaseName());
if (context.getDocBase() != null
&& !context.getDocBase().toLowerCase(Locale.ENGLISH).endsWith(".war")) {
// first assume docBase is absolute
expandedDocBase = new File(context.getDocBase());
if (!expandedDocBase.isAbsolute()) {
// if docBase specified and relative, it must be relative to appBase
expandedDocBase = new File(host.getAppBaseFile(), context.getDocBase());
}
}
boolean unpackWAR = unpackWARs;
if (unpackWAR && context instanceof StandardContext) {
unpackWAR = ((StandardContext) context).getUnpackWAR();
}
// Add the eventual unpacked WAR and all the resources which will be
// watched inside it
if (isExternalWar) {
if (unpackWAR) {
deployedApp.redeployResources.put(expandedDocBase.getAbsolutePath(),
Long.valueOf(expandedDocBase.lastModified()));
addWatchedResources(deployedApp, expandedDocBase.getAbsolutePath(), context);
} else {
addWatchedResources(deployedApp, null, context);
}
} else {
// Find an existing matching war and expanded folder
if (!isExternal) {
File warDocBase = new File(expandedDocBase.getAbsolutePath() + ".war");
if (warDocBase.exists()) {
deployedApp.redeployResources.put(warDocBase.getAbsolutePath(),
Long.valueOf(warDocBase.lastModified()));
} else {
// Trigger a redeploy if a WAR is added
deployedApp.redeployResources.put(
warDocBase.getAbsolutePath(),
Long.valueOf(0));
}
}
if (unpackWAR) {
deployedApp.redeployResources.put(expandedDocBase.getAbsolutePath(),
Long.valueOf(expandedDocBase.lastModified()));
addWatchedResources(deployedApp,
expandedDocBase.getAbsolutePath(), context);
} else {
addWatchedResources(deployedApp, null, context);
}
if (!isExternal) {
// For external docBases, the context.xml will have been
// added above.
deployedApp.redeployResources.put(
contextXml.getAbsolutePath(),
Long.valueOf(contextXml.lastModified()));
}
}
// Add the global redeploy resources (which are never deleted) at
// the end so they don't interfere with the deletion process
addGlobalRedeployResources(deployedApp);
}
if (host.findChild(context.getName()) != null) {
deployed.put(context.getName(), deployedApp);
}
if (log.isInfoEnabled()) {
log.info(sm.getString("hostConfig.deployDescriptor.finished",
contextXml.getAbsolutePath(), Long.valueOf(System.currentTimeMillis() - startTime)));
}
}
/**
* Deploy WAR files.
* @param appBase The base path for applications
* @param files The WARs to deploy
*/
protected void deployWARs(File appBase, String[] files) {
if (files == null)
return;
ExecutorService es = host.getStartStopExecutor();
List> results = new ArrayList<>();
for (int i = 0; i < files.length; i++) {
if (files[i].equalsIgnoreCase("META-INF"))
continue;
if (files[i].equalsIgnoreCase("WEB-INF"))
continue;
File war = new File(appBase, files[i]);
if (files[i].toLowerCase(Locale.ENGLISH).endsWith(".war") &&
war.isFile() && !invalidWars.contains(files[i]) ) {
ContextName cn = new ContextName(files[i], true);
if (isServiced(cn.getName())) {
continue;
}
if (deploymentExists(cn.getName())) {
DeployedApplication app = deployed.get(cn.getName());
boolean unpackWAR = unpackWARs;
if (unpackWAR && host.findChild(cn.getName()) instanceof StandardContext) {
unpackWAR = ((StandardContext) host.findChild(cn.getName())).getUnpackWAR();
}
if (!unpackWAR && app != null) {
// Need to check for a directory that should not be
// there
File dir = new File(appBase, cn.getBaseName());
if (dir.exists()) {
if (!app.loggedDirWarning) {
log.warn(sm.getString(
"hostConfig.deployWar.hiddenDir",
dir.getAbsoluteFile(),
war.getAbsoluteFile()));
app.loggedDirWarning = true;
}
} else {
app.loggedDirWarning = false;
}
}
continue;
}
// Check for WARs with /../ /./ or similar sequences in the name
if (!validateContextPath(appBase, cn.getBaseName())) {
log.error(sm.getString(
"hostConfig.illegalWarName", files[i]));
invalidWars.add(files[i]);
continue;
}
results.add(es.submit(new DeployWar(this, cn, war)));
}
}
for (Future result : results) {
try {
result.get();
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployWar.threaded.error"), e);
}
}
}
private boolean validateContextPath(File appBase, String contextPath) {
// More complicated than the ideal as the canonical path may or may
// not end with File.separator for a directory
StringBuilder docBase;
String canonicalDocBase = null;
try {
String canonicalAppBase = appBase.getCanonicalPath();
docBase = new StringBuilder(canonicalAppBase);
if (canonicalAppBase.endsWith(File.separator)) {
docBase.append(contextPath.substring(1).replace(
'/', File.separatorChar));
} else {
docBase.append(contextPath.replace('/', File.separatorChar));
}
// At this point docBase should be canonical but will not end
// with File.separator
canonicalDocBase =
(new File(docBase.toString())).getCanonicalPath();
// If the canonicalDocBase ends with File.separator, add one to
// docBase before they are compared
if (canonicalDocBase.endsWith(File.separator)) {
docBase.append(File.separator);
}
} catch (IOException ioe) {
return false;
}
// Compare the two. If they are not the same, the contextPath must
// have /../ like sequences in it
return canonicalDocBase.equals(docBase.toString());
}
/**
* Deploy packed WAR.
* @param cn The context name
* @param war The WAR file
*/
protected void deployWAR(ContextName cn, File war) {
File xml = new File(host.getAppBaseFile(),
cn.getBaseName() + "/" + Constants.ApplicationContextXml);
File warTracker = new File(host.getAppBaseFile(), cn.getBaseName() + Constants.WarTracker);
boolean xmlInWar = false;
try (JarFile jar = new JarFile(war)) {
JarEntry entry = jar.getJarEntry(Constants.ApplicationContextXml);
if (entry != null) {
xmlInWar = true;
}
} catch (IOException e) {
/* Ignore */
}
// If there is an expanded directory then any xml in that directory
// should only be used if the directory is not out of date and
// unpackWARs is true. Note the code below may apply further limits
boolean useXml = false;
// If the xml file exists then expandedDir must exists so no need to
// test that here
if (xml.exists() && unpackWARs &&
(!warTracker.exists() || warTracker.lastModified() == war.lastModified())) {
useXml = true;
}
Context context = null;
boolean deployThisXML = isDeployThisXML(war, cn);
try {
if (deployThisXML && useXml && !copyXML) {
synchronized (digesterLock) {
try {
context = (Context) digester.parse(xml);
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployDescriptor.error",
war.getAbsolutePath()), e);
} finally {
digester.reset();
if (context == null) {
context = new FailedContext();
}
}
}
context.setConfigFile(xml.toURI().toURL());
} else if (deployThisXML && xmlInWar) {
synchronized (digesterLock) {
try (JarFile jar = new JarFile(war)) {
JarEntry entry = jar.getJarEntry(Constants.ApplicationContextXml);
try (InputStream istream = jar.getInputStream(entry)) {
context = (Context) digester.parse(istream);
}
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployDescriptor.error",
war.getAbsolutePath()), e);
} finally {
digester.reset();
if (context == null) {
context = new FailedContext();
}
context.setConfigFile(
UriUtil.buildJarUrl(war, Constants.ApplicationContextXml));
}
}
} else if (!deployThisXML && xmlInWar) {
// Block deployment as META-INF/context.xml may contain security
// configuration necessary for a secure deployment.
log.error(sm.getString("hostConfig.deployDescriptor.blocked",
cn.getPath(), Constants.ApplicationContextXml,
new File(host.getConfigBaseFile(), cn.getBaseName() + ".xml")));
} else {
context = (Context) Class.forName(contextClass).getConstructor().newInstance();
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("hostConfig.deployWar.error",
war.getAbsolutePath()), t);
} finally {
if (context == null) {
context = new FailedContext();
}
}
boolean copyThisXml = false;
if (deployThisXML) {
if (host instanceof StandardHost) {
copyThisXml = ((StandardHost) host).isCopyXML();
}
// If Host is using default value Context can override it.
if (!copyThisXml && context instanceof StandardContext) {
copyThisXml = ((StandardContext) context).getCopyXML();
}
if (xmlInWar && copyThisXml) {
// Change location of XML file to config base
xml = new File(host.getConfigBaseFile(),
cn.getBaseName() + ".xml");
try (JarFile jar = new JarFile(war)) {
JarEntry entry = jar.getJarEntry(Constants.ApplicationContextXml);
try (InputStream istream = jar.getInputStream(entry);
OutputStream ostream = new FileOutputStream(xml)) {
IOTools.flow(istream, ostream);
}
} catch (IOException e) {
/* Ignore */
}
}
}
DeployedApplication deployedApp = new DeployedApplication(cn.getName(),
xml.exists() && deployThisXML && copyThisXml);
long startTime = 0;
// Deploy the application in this WAR file
if(log.isInfoEnabled()) {
startTime = System.currentTimeMillis();
log.info(sm.getString("hostConfig.deployWar",
war.getAbsolutePath()));
}
try {
// Populate redeploy resources with the WAR file
deployedApp.redeployResources.put
(war.getAbsolutePath(), Long.valueOf(war.lastModified()));
if (deployThisXML && xml.exists() && copyThisXml) {
deployedApp.redeployResources.put(xml.getAbsolutePath(),
Long.valueOf(xml.lastModified()));
} else {
// In case an XML file is added to the config base later
deployedApp.redeployResources.put(
(new File(host.getConfigBaseFile(),
cn.getBaseName() + ".xml")).getAbsolutePath(),
Long.valueOf(0));
}
Class clazz = Class.forName(host.getConfigClass());
LifecycleListener listener = (LifecycleListener) clazz.getConstructor().newInstance();
context.addLifecycleListener(listener);
context.setName(cn.getName());
context.setPath(cn.getPath());
context.setWebappVersion(cn.getVersion());
context.setDocBase(cn.getBaseName() + ".war");
host.addChild(context);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("hostConfig.deployWar.error",
war.getAbsolutePath()), t);
} finally {
// If we're unpacking WARs, the docBase will be mutated after
// starting the context
boolean unpackWAR = unpackWARs;
if (unpackWAR && context instanceof StandardContext) {
unpackWAR = ((StandardContext) context).getUnpackWAR();
}
if (unpackWAR && context.getDocBase() != null) {
File docBase = new File(host.getAppBaseFile(), cn.getBaseName());
deployedApp.redeployResources.put(docBase.getAbsolutePath(),
Long.valueOf(docBase.lastModified()));
addWatchedResources(deployedApp, docBase.getAbsolutePath(),
context);
if (deployThisXML && !copyThisXml && (xmlInWar || xml.exists())) {
deployedApp.redeployResources.put(xml.getAbsolutePath(),
Long.valueOf(xml.lastModified()));
}
} else {
// Passing null for docBase means that no resources will be
// watched. This will be logged at debug level.
addWatchedResources(deployedApp, null, context);
}
// Add the global redeploy resources (which are never deleted) at
// the end so they don't interfere with the deletion process
addGlobalRedeployResources(deployedApp);
}
deployed.put(cn.getName(), deployedApp);
if (log.isInfoEnabled()) {
log.info(sm.getString("hostConfig.deployWar.finished",
war.getAbsolutePath(), Long.valueOf(System.currentTimeMillis() - startTime)));
}
}
/**
* Deploy exploded webapps.
* @param appBase The base path for applications
* @param files The exploded webapps that should be deployed
*/
protected void deployDirectories(File appBase, String[] files) {
if (files == null)
return;
ExecutorService es = host.getStartStopExecutor();
List> results = new ArrayList<>();
for (int i = 0; i < files.length; i++) {
if (files[i].equalsIgnoreCase("META-INF"))
continue;
if (files[i].equalsIgnoreCase("WEB-INF"))
continue;
File dir = new File(appBase, files[i]);
if (dir.isDirectory()) {
ContextName cn = new ContextName(files[i], false);
if (isServiced(cn.getName()) || deploymentExists(cn.getName()))
continue;
results.add(es.submit(new DeployDirectory(this, cn, dir)));
}
}
for (Future result : results) {
try {
result.get();
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployDir.threaded.error"), e);
}
}
}
/**
* Deploy exploded webapp.
* @param cn The context name
* @param dir The path to the root folder of the weapp
*/
protected void deployDirectory(ContextName cn, File dir) {
long startTime = 0;
// Deploy the application in this directory
if( log.isInfoEnabled() ) {
startTime = System.currentTimeMillis();
log.info(sm.getString("hostConfig.deployDir",
dir.getAbsolutePath()));
}
Context context = null;
File xml = new File(dir, Constants.ApplicationContextXml);
File xmlCopy =
new File(host.getConfigBaseFile(), cn.getBaseName() + ".xml");
DeployedApplication deployedApp;
boolean copyThisXml = isCopyXML();
boolean deployThisXML = isDeployThisXML(dir, cn);
try {
if (deployThisXML && xml.exists()) {
synchronized (digesterLock) {
try {
context = (Context) digester.parse(xml);
} catch (Exception e) {
log.error(sm.getString(
"hostConfig.deployDescriptor.error",
xml), e);
context = new FailedContext();
} finally {
digester.reset();
if (context == null) {
context = new FailedContext();
}
}
}
if (copyThisXml == false && context instanceof StandardContext) {
// Host is using default value. Context may override it.
copyThisXml = ((StandardContext) context).getCopyXML();
}
if (copyThisXml) {
Files.copy(xml.toPath(), xmlCopy.toPath());
context.setConfigFile(xmlCopy.toURI().toURL());
} else {
context.setConfigFile(xml.toURI().toURL());
}
} else if (!deployThisXML && xml.exists()) {
// Block deployment as META-INF/context.xml may contain security
// configuration necessary for a secure deployment.
log.error(sm.getString("hostConfig.deployDescriptor.blocked",
cn.getPath(), xml, xmlCopy));
context = new FailedContext();
} else {
context = (Context) Class.forName(contextClass).getConstructor().newInstance();
}
Class clazz = Class.forName(host.getConfigClass());
LifecycleListener listener = (LifecycleListener) clazz.getConstructor().newInstance();
context.addLifecycleListener(listener);
context.setName(cn.getName());
context.setPath(cn.getPath());
context.setWebappVersion(cn.getVersion());
context.setDocBase(cn.getBaseName());
host.addChild(context);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("hostConfig.deployDir.error",
dir.getAbsolutePath()), t);
} finally {
deployedApp = new DeployedApplication(cn.getName(),
xml.exists() && deployThisXML && copyThisXml);
// Fake re-deploy resource to detect if a WAR is added at a later
// point
deployedApp.redeployResources.put(dir.getAbsolutePath() + ".war",
Long.valueOf(0));
deployedApp.redeployResources.put(dir.getAbsolutePath(),
Long.valueOf(dir.lastModified()));
if (deployThisXML && xml.exists()) {
if (copyThisXml) {
deployedApp.redeployResources.put(
xmlCopy.getAbsolutePath(),
Long.valueOf(xmlCopy.lastModified()));
} else {
deployedApp.redeployResources.put(
xml.getAbsolutePath(),
Long.valueOf(xml.lastModified()));
// Fake re-deploy resource to detect if a context.xml file is
// added at a later point
deployedApp.redeployResources.put(
xmlCopy.getAbsolutePath(),
Long.valueOf(0));
}
} else {
// Fake re-deploy resource to detect if a context.xml file is
// added at a later point
deployedApp.redeployResources.put(
xmlCopy.getAbsolutePath(),
Long.valueOf(0));
if (!xml.exists()) {
deployedApp.redeployResources.put(
xml.getAbsolutePath(),
Long.valueOf(0));
}
}
addWatchedResources(deployedApp, dir.getAbsolutePath(), context);
// Add the global redeploy resources (which are never deleted) at
// the end so they don't interfere with the deletion process
addGlobalRedeployResources(deployedApp);
}
deployed.put(cn.getName(), deployedApp);
if( log.isInfoEnabled() ) {
log.info(sm.getString("hostConfig.deployDir.finished",
dir.getAbsolutePath(), Long.valueOf(System.currentTimeMillis() - startTime)));
}
}
/**
* Check if a webapp is already deployed in this host.
*
* @param contextName of the context which will be checked
* @return true if the specified deployment exists
*/
protected boolean deploymentExists(String contextName) {
return (deployed.containsKey(contextName) ||
(host.findChild(contextName) != null));
}
/**
* Add watched resources to the specified Context.
* @param app HostConfig deployed app
* @param docBase web app docBase
* @param context web application context
*/
protected void addWatchedResources(DeployedApplication app, String docBase,
Context context) {
// FIXME: Feature idea. Add support for patterns (ex: WEB-INF/*,
// WEB-INF/*.xml), where we would only check if at least one
// resource is newer than app.timestamp
File docBaseFile = null;
if (docBase != null) {
docBaseFile = new File(docBase);
if (!docBaseFile.isAbsolute()) {
docBaseFile = new File(host.getAppBaseFile(), docBase);
}
}
String[] watchedResources = context.findWatchedResources();
for (int i = 0; i < watchedResources.length; i++) {
File resource = new File(watchedResources[i]);
if (!resource.isAbsolute()) {
if (docBase != null) {
resource = new File(docBaseFile, watchedResources[i]);
} else {
if(log.isDebugEnabled())
log.debug("Ignoring non-existent WatchedResource '" +
resource.getAbsolutePath() + "'");
continue;
}
}
if(log.isDebugEnabled())
log.debug("Watching WatchedResource '" +
resource.getAbsolutePath() + "'");
app.reloadResources.put(resource.getAbsolutePath(),
Long.valueOf(resource.lastModified()));
}
}
protected void addGlobalRedeployResources(DeployedApplication app) {
// Redeploy resources processing is hard-coded to never delete this file
File hostContextXml =
new File(getConfigBaseName(), Constants.HostContextXml);
if (hostContextXml.isFile()) {
app.redeployResources.put(hostContextXml.getAbsolutePath(),
Long.valueOf(hostContextXml.lastModified()));
}
// Redeploy resources in CATALINA_BASE/conf are never deleted
File globalContextXml =
returnCanonicalPath(Constants.DefaultContextXml);
if (globalContextXml.isFile()) {
app.redeployResources.put(globalContextXml.getAbsolutePath(),
Long.valueOf(globalContextXml.lastModified()));
}
}
/**
* Check resources for redeployment and reloading.
*
* @param app The web application to check
* @param skipFileModificationResolutionCheck
* When checking files for modification should the check that
* requires that any file modification must have occurred at
* least as long ago as the resolution of the file time stamp
* be skipped
*/
protected synchronized void checkResources(DeployedApplication app,
boolean skipFileModificationResolutionCheck) {
String[] resources =
app.redeployResources.keySet().toArray(new String[0]);
// Offset the current time by the resolution of File.lastModified()
long currentTimeWithResolutionOffset =
System.currentTimeMillis() - FILE_MODIFICATION_RESOLUTION_MS;
for (int i = 0; i < resources.length; i++) {
File resource = new File(resources[i]);
if (log.isDebugEnabled())
log.debug("Checking context[" + app.name +
"] redeploy resource " + resource);
long lastModified =
app.redeployResources.get(resources[i]).longValue();
if (resource.exists() || lastModified == 0) {
// File.lastModified() has a resolution of 1s (1000ms). The last
// modified time has to be more than 1000ms ago to ensure that
// modifications that take place in the same second are not
// missed. See Bug 57765.
if (resource.lastModified() != lastModified && (!host.getAutoDeploy() ||
resource.lastModified() < currentTimeWithResolutionOffset ||
skipFileModificationResolutionCheck)) {
if (resource.isDirectory()) {
// No action required for modified directory
app.redeployResources.put(resources[i],
Long.valueOf(resource.lastModified()));
} else if (app.hasDescriptor &&
resource.getName().toLowerCase(
Locale.ENGLISH).endsWith(".war")) {
// Modified WAR triggers a reload if there is an XML
// file present
// The only resource that should be deleted is the
// expanded WAR (if any)
Context context = (Context) host.findChild(app.name);
String docBase = context.getDocBase();
if (!docBase.toLowerCase(Locale.ENGLISH).endsWith(".war")) {
// This is an expanded directory
File docBaseFile = new File(docBase);
if (!docBaseFile.isAbsolute()) {
docBaseFile = new File(host.getAppBaseFile(),
docBase);
}
reload(app, docBaseFile, resource.getAbsolutePath());
} else {
reload(app, null, null);
}
// Update times
app.redeployResources.put(resources[i],
Long.valueOf(resource.lastModified()));
app.timestamp = System.currentTimeMillis();
boolean unpackWAR = unpackWARs;
if (unpackWAR && context instanceof StandardContext) {
unpackWAR = ((StandardContext) context).getUnpackWAR();
}
if (unpackWAR) {
addWatchedResources(app, context.getDocBase(), context);
} else {
addWatchedResources(app, null, context);
}
return;
} else {
// Everything else triggers a redeploy
// (just need to undeploy here, deploy will follow)
undeploy(app);
deleteRedeployResources(app, resources, i, false);
return;
}
}
} else {
// There is a chance the the resource was only missing
// temporarily eg renamed during a text editor save
try {
Thread.sleep(500);
} catch (InterruptedException e1) {
// Ignore
}
// Recheck the resource to see if it was really deleted
if (resource.exists()) {
continue;
}
// Undeploy application
undeploy(app);
deleteRedeployResources(app, resources, i, true);
return;
}
}
resources = app.reloadResources.keySet().toArray(new String[0]);
boolean update = false;
for (int i = 0; i < resources.length; i++) {
File resource = new File(resources[i]);
if (log.isDebugEnabled()) {
log.debug("Checking context[" + app.name + "] reload resource " + resource);
}
long lastModified = app.reloadResources.get(resources[i]).longValue();
// File.lastModified() has a resolution of 1s (1000ms). The last
// modified time has to be more than 1000ms ago to ensure that
// modifications that take place in the same second are not
// missed. See Bug 57765.
if ((resource.lastModified() != lastModified &&
(!host.getAutoDeploy() ||
resource.lastModified() < currentTimeWithResolutionOffset ||
skipFileModificationResolutionCheck)) ||
update) {
if (!update) {
// Reload application
reload(app, null, null);
update = true;
}
// Update times. More than one file may have been updated. We
// don't want to trigger a series of reloads.
app.reloadResources.put(resources[i],
Long.valueOf(resource.lastModified()));
}
app.timestamp = System.currentTimeMillis();
}
}
/*
* Note: If either of fileToRemove and newDocBase are null, both will be
* ignored.
*/
private void reload(DeployedApplication app, File fileToRemove, String newDocBase) {
if(log.isInfoEnabled())
log.info(sm.getString("hostConfig.reload", app.name));
Context context = (Context) host.findChild(app.name);
if (context.getState().isAvailable()) {
if (fileToRemove != null && newDocBase != null) {
context.addLifecycleListener(
new ExpandedDirectoryRemovalListener(fileToRemove, newDocBase));
}
// Reload catches and logs exceptions
context.reload();
} else {
// If the context was not started (for example an error
// in web.xml) we'll still get to try to start
if (fileToRemove != null && newDocBase != null) {
ExpandWar.delete(fileToRemove);
context.setDocBase(newDocBase);
}
try {
context.start();
} catch (Exception e) {
log.error(sm.getString("hostConfig.context.restart", app.name), e);
}
}
}
private void undeploy(DeployedApplication app) {
if (log.isInfoEnabled())
log.info(sm.getString("hostConfig.undeploy", app.name));
Container context = host.findChild(app.name);
try {
host.removeChild(context);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.warn(sm.getString
("hostConfig.context.remove", app.name), t);
}
deployed.remove(app.name);
}
private void deleteRedeployResources(DeployedApplication app, String[] resources, int i,
boolean deleteReloadResources) {
// Delete other redeploy resources
for (int j = i + 1; j < resources.length; j++) {
File current = new File(resources[j]);
// Never delete per host context.xml defaults
if (Constants.HostContextXml.equals(current.getName())) {
continue;
}
// Only delete resources in the appBase or the
// host's configBase
if (isDeletableResource(app, current)) {
if (log.isDebugEnabled()) {
log.debug("Delete " + current);
}
ExpandWar.delete(current);
}
}
// Delete reload resources (to remove any remaining .xml descriptor)
if (deleteReloadResources) {
String[] resources2 = app.reloadResources.keySet().toArray(new String[0]);
for (int j = 0; j < resources2.length; j++) {
File current = new File(resources2[j]);
// Never delete per host context.xml defaults
if (Constants.HostContextXml.equals(current.getName())) {
continue;
}
// Only delete resources in the appBase or the host's
// configBase
if (isDeletableResource(app, current)) {
if (log.isDebugEnabled()) {
log.debug("Delete " + current);
}
ExpandWar.delete(current);
}
}
}
}
/*
* Delete any resource that would trigger the automatic deployment code to
* re-deploy the application. This means deleting:
* - any resource located in the appBase
* - any deployment descriptor located under the configBase
* - symlinks in the appBase or configBase for either of the above
*/
private boolean isDeletableResource(DeployedApplication app, File resource) {
// The resource may be a file, a directory or a symlink to a file or
// directory.
// Check that the resource is absolute. This should always be the case.
if (!resource.isAbsolute()) {
log.warn(sm.getString("hostConfig.resourceNotAbsolute", app.name, resource));
return false;
}
// Determine where the resource is located
String canonicalLocation;
try {
canonicalLocation = resource.getParentFile().getCanonicalPath();
} catch (IOException e) {
log.warn(sm.getString(
"hostConfig.canonicalizing", resource.getParentFile(), app.name), e);
return false;
}
String canonicalAppBase;
try {
canonicalAppBase = host.getAppBaseFile().getCanonicalPath();
} catch (IOException e) {
log.warn(sm.getString(
"hostConfig.canonicalizing", host.getAppBaseFile(), app.name), e);
return false;
}
if (canonicalLocation.equals(canonicalAppBase)) {
// Resource is located in the appBase so it may be deleted
return true;
}
String canonicalConfigBase;
try {
canonicalConfigBase = host.getConfigBaseFile().getCanonicalPath();
} catch (IOException e) {
log.warn(sm.getString(
"hostConfig.canonicalizing", host.getConfigBaseFile(), app.name), e);
return false;
}
if (canonicalLocation.equals(canonicalConfigBase) &&
resource.getName().endsWith(".xml")) {
// Resource is an xml file in the configBase so it may be deleted
return true;
}
// All other resources should not be deleted
return false;
}
public void beforeStart() {
if (host.getCreateDirs()) {
File[] dirs = new File[] {host.getAppBaseFile(),host.getConfigBaseFile()};
for (int i=0; i sortedAppNames = new TreeSet<>();
sortedAppNames.addAll(deployed.keySet());
Iterator iter = sortedAppNames.iterator();
ContextName previous = new ContextName(iter.next(), false);
do {
ContextName current = new ContextName(iter.next(), false);
if (current.getPath().equals(previous.getPath())) {
// Current and previous are same path - current will always
// be a later version
Context previousContext = (Context) host.findChild(previous.getName());
Context currentContext = (Context) host.findChild(current.getName());
if (previousContext != null && currentContext != null &&
currentContext.getState().isAvailable() &&
!isServiced(previous.getName())) {
Manager manager = previousContext.getManager();
if (manager != null) {
int sessionCount;
if (manager instanceof DistributedManager) {
sessionCount = ((DistributedManager) manager).getActiveSessionsFull();
} else {
sessionCount = manager.getActiveSessions();
}
if (sessionCount == 0) {
if (log.isInfoEnabled()) {
log.info(sm.getString(
"hostConfig.undeployVersion", previous.getName()));
}
DeployedApplication app = deployed.get(previous.getName());
String[] resources = app.redeployResources.keySet().toArray(new String[0]);
// Version is unused - undeploy it completely
// The -1 is a 'trick' to ensure all redeploy
// resources are removed
undeploy(app);
deleteRedeployResources(app, resources, -1, true);
}
}
}
}
previous = current;
} while (iter.hasNext());
}
/**
* Add a new Context to be managed by us.
* Entry point for the admin webapp, and other JMX Context controllers.
* @param context The context instance
*/
public void manageApp(Context context) {
String contextName = context.getName();
if (deployed.containsKey(contextName))
return;
DeployedApplication deployedApp =
new DeployedApplication(contextName, false);
// Add the associated docBase to the redeployed list if it's a WAR
boolean isWar = false;
if (context.getDocBase() != null) {
File docBase = new File(context.getDocBase());
if (!docBase.isAbsolute()) {
docBase = new File(host.getAppBaseFile(), context.getDocBase());
}
deployedApp.redeployResources.put(docBase.getAbsolutePath(),
Long.valueOf(docBase.lastModified()));
if (docBase.getAbsolutePath().toLowerCase(Locale.ENGLISH).endsWith(".war")) {
isWar = true;
}
}
host.addChild(context);
// Add the eventual unpacked WAR and all the resources which will be
// watched inside it
boolean unpackWAR = unpackWARs;
if (unpackWAR && context instanceof StandardContext) {
unpackWAR = ((StandardContext) context).getUnpackWAR();
}
if (isWar && unpackWAR) {
File docBase = new File(host.getAppBaseFile(), context.getBaseName());
deployedApp.redeployResources.put(docBase.getAbsolutePath(),
Long.valueOf(docBase.lastModified()));
addWatchedResources(deployedApp, docBase.getAbsolutePath(), context);
} else {
addWatchedResources(deployedApp, null, context);
}
deployed.put(contextName, deployedApp);
}
/**
* Remove a webapp from our control.
* Entry point for the admin webapp, and other JMX Context controllers.
* @param contextName The context name
*/
public void unmanageApp(String contextName) {
if(isServiced(contextName)) {
deployed.remove(contextName);
host.removeChild(host.findChild(contextName));
}
}
// ----------------------------------------------------- Instance Variables
/**
* This class represents the state of a deployed application, as well as
* the monitored resources.
*/
protected static class DeployedApplication {
public DeployedApplication(String name, boolean hasDescriptor) {
this.name = name;
this.hasDescriptor = hasDescriptor;
}
/**
* Application context path. The assertion is that
* (host.getChild(name) != null).
*/
public final String name;
/**
* Does this application have a context.xml descriptor file on the
* host's configBase?
*/
public final boolean hasDescriptor;
/**
* Any modification of the specified (static) resources will cause a
* redeployment of the application. If any of the specified resources is
* removed, the application will be undeployed. Typically, this will
* contain resources like the context.xml file, a compressed WAR path.
* The value is the last modification time.
*/
public final LinkedHashMap redeployResources =
new LinkedHashMap<>();
/**
* Any modification of the specified (static) resources will cause a
* reload of the application. This will typically contain resources
* such as the web.xml of a webapp, but can be configured to contain
* additional descriptors.
* The value is the last modification time.
*/
public final HashMap reloadResources = new HashMap<>();
/**
* Instant where the application was last put in service.
*/
public long timestamp = System.currentTimeMillis();
/**
* In some circumstances, such as when unpackWARs is true, a directory
* may be added to the appBase that is ignored. This flag indicates that
* the user has been warned so that the warning is not logged on every
* run of the auto deployer.
*/
public boolean loggedDirWarning = false;
}
private static class DeployDescriptor implements Runnable {
private HostConfig config;
private ContextName cn;
private File descriptor;
public DeployDescriptor(HostConfig config, ContextName cn,
File descriptor) {
this.config = config;
this.cn = cn;
this.descriptor= descriptor;
}
@Override
public void run() {
config.deployDescriptor(cn, descriptor);
}
}
private static class DeployWar implements Runnable {
private HostConfig config;
private ContextName cn;
private File war;
public DeployWar(HostConfig config, ContextName cn, File war) {
this.config = config;
this.cn = cn;
this.war = war;
}
@Override
public void run() {
config.deployWAR(cn, war);
}
}
private static class DeployDirectory implements Runnable {
private HostConfig config;
private ContextName cn;
private File dir;
public DeployDirectory(HostConfig config, ContextName cn, File dir) {
this.config = config;
this.cn = cn;
this.dir = dir;
}
@Override
public void run() {
config.deployDirectory(cn, dir);
}
}
/*
* The purpose of this class is to provide a way for HostConfig to get
* a Context to delete an expanded WAR after the Context stops. This is to
* resolve this issue described in Bug 57772. The alternative solutions
* require either duplicating a lot of the Context.reload() code in
* HostConfig or adding a new reload(boolean) method to Context that allows
* the caller to optionally delete any expanded WAR.
*
* The LifecycleListener approach offers greater flexibility and enables the
* behaviour to be changed / extended / removed in future without changing
* the Context API.
*/
private static class ExpandedDirectoryRemovalListener implements LifecycleListener {
private final File toDelete;
private final String newDocBase;
/**
* Create a listener that will ensure that any expanded WAR is removed
* and the docBase set to the specified WAR.
*
* @param toDelete The file (a directory representing an expanded WAR)
* to be deleted
* @param newDocBase The new docBase for the Context
*/
public ExpandedDirectoryRemovalListener(File toDelete, String newDocBase) {
this.toDelete = toDelete;
this.newDocBase = newDocBase;
}
@Override
public void lifecycleEvent(LifecycleEvent event) {
if (Lifecycle.AFTER_STOP_EVENT.equals(event.getType())) {
// The context has stopped.
Context context = (Context) event.getLifecycle();
// Remove the old expanded WAR.
ExpandWar.delete(toDelete);
// Reset the docBase to trigger re-expansion of the WAR.
context.setDocBase(newDocBase);
// Remove this listener from the Context else it will run every
// time the Context is stopped.
context.removeLifecycleListener(this);
}
}
}
}