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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.core;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.regex.Pattern;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.Host;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Valve;
import org.apache.catalina.loader.WebappClassLoader;
import org.apache.catalina.mbeans.MBeanUtils;
import org.apache.catalina.valves.ValveBase;
import org.apache.tomcat.util.ExceptionUtils;
/**
* Standard implementation of the Host interface. Each
* child container must be a Context implementation to process the
* requests directed to a particular web application.
*
* @author Craig R. McClanahan
* @author Remy Maucherat
* @version $Id: StandardHost.java 1057788 2011-01-11 18:35:42Z markt $
*/
public class StandardHost extends ContainerBase implements Host {
private static final org.apache.juli.logging.Log log=
org.apache.juli.logging.LogFactory.getLog( StandardHost.class );
// ----------------------------------------------------------- Constructors
/**
* Create a new StandardHost component with the default basic Valve.
*/
public StandardHost() {
super();
pipeline.setBasic(new StandardHostValve());
}
// ----------------------------------------------------- Instance Variables
/**
* The set of aliases for this Host.
*/
private String[] aliases = new String[0];
private final Object aliasesLock = new Object();
/**
* The application root for this Host.
*/
private String appBase = "webapps";
/**
* The XML root for this Host.
*/
private String xmlBase = null;
/**
* The auto deploy flag for this Host.
*/
private boolean autoDeploy = true;
/**
* The Java class name of the default context configuration class
* for deployed web applications.
*/
private String configClass =
"org.apache.catalina.startup.ContextConfig";
/**
* The Java class name of the default Context implementation class for
* deployed web applications.
*/
private String contextClass =
"org.apache.catalina.core.StandardContext";
/**
* The deploy on startup flag for this Host.
*/
private boolean deployOnStartup = true;
/**
* deploy Context XML config files property.
*/
private boolean deployXML = true;
/**
* Should XML files be copied to $CATALINA_BASE/conf// by
* default when a web application is deployed?
*/
private boolean copyXML = false;
/**
* The Java class name of the default error reporter implementation class
* for deployed web applications.
*/
private String errorReportValveClass =
"org.apache.catalina.valves.ErrorReportValve";
/**
* The descriptive information string for this implementation.
*/
private static final String info =
"org.apache.catalina.core.StandardHost/1.0";
/**
* Unpack WARs property.
*/
private boolean unpackWARs = true;
/**
* Work Directory base for applications.
*/
private String workDir = null;
/**
* Should we create directories upon startup for appBase and xmlBase
*/
private boolean createDirs = true;
/**
* Track the class loaders for the child web applications so memory leaks
* can be detected.
*/
private Map childClassLoaders =
new WeakHashMap();
/**
* Any file or directory in {@link #appBase} that this pattern matches will
* be ignored by the automatic deployment process (both
* {@link #deployOnStartup} and {@link #autoDeploy}).
*/
private Pattern deployIgnore = null;
// ------------------------------------------------------------- Properties
/**
* Return the application root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
*/
@Override
public String getAppBase() {
return (this.appBase);
}
/**
* Return the XML root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
* If null, defaults to ${catalina.base}/conf/ directory
*/
@Override
public String getXmlBase() {
return (this.xmlBase);
}
/**
* Set the application root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
*
* @param appBase The new application root
*/
@Override
public void setAppBase(String appBase) {
String oldAppBase = this.appBase;
this.appBase = appBase;
support.firePropertyChange("appBase", oldAppBase, this.appBase);
}
/**
* Set the Xml root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
* If null, defaults to ${catalina.base}/conf/ directory
*
* @param xmlBase The new XML root
*/
@Override
public void setXmlBase(String xmlBase) {
String oldXmlBase = this.xmlBase;
this.xmlBase = xmlBase;
support.firePropertyChange("xmlBase", oldXmlBase, this.xmlBase);
}
/**
* Returns true if the Host will attempt to create directories for appBase and xmlBase
* unless they already exist.
*/
@Override
public boolean getCreateDirs() {
return createDirs;
}
/**
* Set to true if the Host should attempt to create directories for xmlBase and appBase upon startup
* @param createDirs
*/
@Override
public void setCreateDirs(boolean createDirs) {
this.createDirs = createDirs;
}
/**
* Return the value of the auto deploy flag. If true, it indicates that
* this host's child webapps will be dynamically deployed.
*/
@Override
public boolean getAutoDeploy() {
return (this.autoDeploy);
}
/**
* Set the auto deploy flag value for this host.
*
* @param autoDeploy The new auto deploy flag
*/
@Override
public void setAutoDeploy(boolean autoDeploy) {
boolean oldAutoDeploy = this.autoDeploy;
this.autoDeploy = autoDeploy;
support.firePropertyChange("autoDeploy", oldAutoDeploy,
this.autoDeploy);
}
/**
* Return the Java class name of the context configuration class
* for new web applications.
*/
@Override
public String getConfigClass() {
return (this.configClass);
}
/**
* Set the Java class name of the context configuration class
* for new web applications.
*
* @param configClass The new context configuration class
*/
@Override
public void setConfigClass(String configClass) {
String oldConfigClass = this.configClass;
this.configClass = configClass;
support.firePropertyChange("configClass",
oldConfigClass, this.configClass);
}
/**
* Return the Java class name of the Context implementation class
* for new web applications.
*/
public String getContextClass() {
return (this.contextClass);
}
/**
* Set the Java class name of the Context implementation class
* for new web applications.
*
* @param contextClass The new context implementation class
*/
public void setContextClass(String contextClass) {
String oldContextClass = this.contextClass;
this.contextClass = contextClass;
support.firePropertyChange("contextClass",
oldContextClass, this.contextClass);
}
/**
* Return the value of the deploy on startup flag. If true, it indicates
* that this host's child webapps should be discovered and automatically
* deployed at startup time.
*/
@Override
public boolean getDeployOnStartup() {
return (this.deployOnStartup);
}
/**
* Set the deploy on startup flag value for this host.
*
* @param deployOnStartup The new deploy on startup flag
*/
@Override
public void setDeployOnStartup(boolean deployOnStartup) {
boolean oldDeployOnStartup = this.deployOnStartup;
this.deployOnStartup = deployOnStartup;
support.firePropertyChange("deployOnStartup", oldDeployOnStartup,
this.deployOnStartup);
}
/**
* Deploy XML Context config files flag accessor.
*/
public boolean isDeployXML() {
return (deployXML);
}
/**
* Deploy XML Context config files flag mutator.
*/
public void setDeployXML(boolean deployXML) {
this.deployXML = deployXML;
}
/**
* 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 Java class name of the error report valve class
* for new web applications.
*/
public String getErrorReportValveClass() {
return (this.errorReportValveClass);
}
/**
* Set the Java class name of the error report valve class
* for new web applications.
*
* @param errorReportValveClass The new error report valve class
*/
public void setErrorReportValveClass(String errorReportValveClass) {
String oldErrorReportValveClassClass = this.errorReportValveClass;
this.errorReportValveClass = errorReportValveClass;
support.firePropertyChange("errorReportValveClass",
oldErrorReportValveClassClass,
this.errorReportValveClass);
}
/**
* Return the canonical, fully qualified, name of the virtual host
* this Container represents.
*/
@Override
public String getName() {
return (name);
}
/**
* Set the canonical, fully qualified, name of the virtual host
* this Container represents.
*
* @param name Virtual host name
*
* @exception IllegalArgumentException if name is null
*/
@Override
public void setName(String name) {
if (name == null)
throw new IllegalArgumentException
(sm.getString("standardHost.nullName"));
name = name.toLowerCase(Locale.ENGLISH); // Internally all names are lower case
String oldName = this.name;
this.name = name;
support.firePropertyChange("name", oldName, this.name);
}
/**
* Unpack WARs flag accessor.
*/
public boolean isUnpackWARs() {
return (unpackWARs);
}
/**
* Unpack WARs flag mutator.
*/
public void setUnpackWARs(boolean unpackWARs) {
this.unpackWARs = unpackWARs;
}
/**
* Host work directory base.
*/
public String getWorkDir() {
return (workDir);
}
/**
* Host work directory base.
*/
public void setWorkDir(String workDir) {
this.workDir = workDir;
}
/**
* Return the regular expression that defines the files and directories in
* the host's {@link #appBase} that will be ignored by the automatic
* deployment process.
*/
@Override
public String getDeployIgnore() {
if (deployIgnore == null) {
return null;
}
return this.deployIgnore.toString();
}
/**
* Return the compiled regular expression that defines the files and
* directories in the host's {@link #appBase} that will be ignored by the
* automatic deployment process.
*/
@Override
public Pattern getDeployIgnorePattern() {
return this.deployIgnore;
}
/**
* Set the regular expression that defines the files and directories in
* the host's {@link #appBase} that will be ignored by the automatic
* deployment process.
*/
@Override
public void setDeployIgnore(String deployIgnore) {
String oldDeployIgnore;
if (this.deployIgnore == null) {
oldDeployIgnore = null;
} else {
oldDeployIgnore = this.deployIgnore.toString();
}
if (deployIgnore == null) {
this.deployIgnore = null;
} else {
this.deployIgnore = Pattern.compile(deployIgnore);
}
support.firePropertyChange("deployIgnore",
oldDeployIgnore,
deployIgnore);
}
// --------------------------------------------------------- Public Methods
/**
* Add an alias name that should be mapped to this same Host.
*
* @param alias The alias to be added
*/
@Override
public void addAlias(String alias) {
alias = alias.toLowerCase(Locale.ENGLISH);
synchronized (aliasesLock) {
// Skip duplicate aliases
for (int i = 0; i < aliases.length; i++) {
if (aliases[i].equals(alias))
return;
}
// Add this alias to the list
String newAliases[] = new String[aliases.length + 1];
for (int i = 0; i < aliases.length; i++)
newAliases[i] = aliases[i];
newAliases[aliases.length] = alias;
aliases = newAliases;
}
// Inform interested listeners
fireContainerEvent(ADD_ALIAS_EVENT, alias);
}
/**
* Add a child Container, only if the proposed child is an implementation
* of Context.
*
* @param child Child container to be added
*/
@Override
public void addChild(Container child) {
child.addLifecycleListener(new MemoryLeakTrackingListener());
if (!(child instanceof Context))
throw new IllegalArgumentException
(sm.getString("standardHost.notContext"));
super.addChild(child);
}
/**
* Used to ensure the regardless of {@link Context} implementation, a record
* is kept of the class loader used every time a context starts.
*/
private class MemoryLeakTrackingListener implements LifecycleListener {
@Override
public void lifecycleEvent(LifecycleEvent event) {
if (event.getType().equals(Lifecycle.AFTER_START_EVENT)) {
if (event.getSource() instanceof Context) {
Context context = ((Context) event.getSource());
childClassLoaders.put(context.getLoader().getClassLoader(),
context.getServletContext().getContextPath());
}
}
}
}
/**
* Attempt to identify the contexts that have a class loader memory leak.
* This is usually triggered on context reload. Note: This method attempts
* to force a full garbage collection. This should be used with extreme
* caution on a production system.
*/
public String[] findReloadedContextMemoryLeaks() {
System.gc();
List result = new ArrayList();
for (Map.Entry entry :
childClassLoaders.entrySet()) {
ClassLoader cl = entry.getKey();
if (cl instanceof WebappClassLoader) {
if (!((WebappClassLoader) cl).isStarted()) {
result.add(entry.getValue());
}
}
}
return result.toArray(new String[result.size()]);
}
/**
* Return the set of alias names for this Host. If none are defined,
* a zero length array is returned.
*/
@Override
public String[] findAliases() {
synchronized (aliasesLock) {
return (this.aliases);
}
}
/**
* Return descriptive information about this Container implementation and
* the corresponding version number, in the format
* <description>/<version>.
*/
@Override
public String getInfo() {
return (info);
}
/**
* Remove the specified alias name from the aliases for this Host.
*
* @param alias Alias name to be removed
*/
@Override
public void removeAlias(String alias) {
alias = alias.toLowerCase(Locale.ENGLISH);
synchronized (aliasesLock) {
// Make sure this alias is currently present
int n = -1;
for (int i = 0; i < aliases.length; i++) {
if (aliases[i].equals(alias)) {
n = i;
break;
}
}
if (n < 0)
return;
// Remove the specified alias
int j = 0;
String results[] = new String[aliases.length - 1];
for (int i = 0; i < aliases.length; i++) {
if (i != n)
results[j++] = aliases[i];
}
aliases = results;
}
// Inform interested listeners
fireContainerEvent(REMOVE_ALIAS_EVENT, alias);
}
/**
* Return a String representation of this component.
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
if (getParent() != null) {
sb.append(getParent().toString());
sb.append(".");
}
sb.append("StandardHost[");
sb.append(getName());
sb.append("]");
return (sb.toString());
}
/**
* Start this component and implement the requirements
* of {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents this component from being used
*/
@Override
protected synchronized void startInternal() throws LifecycleException {
// Set error report valve
String errorValve = getErrorReportValveClass();
if ((errorValve != null) && (!errorValve.equals(""))) {
try {
boolean found = false;
Valve[] valves = getPipeline().getValves();
for (Valve valve : valves) {
if (errorValve.equals(valve.getClass().getName())) {
found = true;
break;
}
}
if(!found) {
Valve valve =
(Valve) Class.forName(errorValve).newInstance();
getPipeline().addValve(valve);
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString(
"standardHost.invalidErrorReportValveClass",
errorValve), t);
}
}
super.startInternal();
}
// -------------------- JMX --------------------
/**
* Return the MBean Names of the Valves associated with this Host
*
* @exception Exception if an MBean cannot be created or registered
*/
public String [] getValveNames()
throws Exception
{
Valve [] valves = this.getPipeline().getValves();
String [] mbeanNames = new String[valves.length];
for (int i = 0; i < valves.length; i++) {
if( valves[i] == null ) continue;
if( ((ValveBase)valves[i]).getObjectName() == null ) continue;
mbeanNames[i] = ((ValveBase)valves[i]).getObjectName().toString();
}
return mbeanNames;
}
public String[] getAliases() {
synchronized (aliasesLock) {
return aliases;
}
}
@Override
protected String getObjectNameKeyProperties() {
StringBuilder keyProperties = new StringBuilder("type=Host");
keyProperties.append(MBeanUtils.getContainerKeyProperties(this));
return keyProperties.toString();
}
}
