/*
* $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/core/ContainerBase.java,v 1.21 2002/06/09 02:19:42 remm Exp $
* $Revision: 1.21 $
* $Date: 2002/06/09 02:19:42 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* SUCH DAMAGE.
* ====================================================================
*
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* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.catalina.core;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import javax.servlet.ServletException;
import javax.naming.directory.DirContext;
import org.apache.naming.resources.ProxyDirContext;
import org.apache.catalina.Cluster;
import org.apache.catalina.Container;
import org.apache.catalina.ContainerEvent;
import org.apache.catalina.ContainerListener;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Loader;
import org.apache.catalina.Logger;
import org.apache.catalina.Manager;
import org.apache.catalina.Mapper;
import org.apache.catalina.Pipeline;
import org.apache.catalina.Realm;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.Valve;
import org.apache.catalina.util.LifecycleSupport;
import org.apache.catalina.util.StringManager;
/**
* Abstract implementation of the <b>Container</b> interface, providing common
* functionality required by nearly every implementation. Classes extending
* this base class must implement <code>getInfo()</code>, and may implement
* a replacement for <code>invoke()</code>.
* <p>
* All subclasses of this abstract base class will include support for a
* Pipeline object that defines the processing to be performed for each request
* received by the <code>invoke()</code> method of this class, utilizing the
* "Chain of Responsibility" design pattern. A subclass should encapsulate its
* own processing functionality as a <code>Valve</code>, and configure this
* Valve into the pipeline by calling <code>setBasic()</code>.
* <p>
* This implementation fires property change events, per the JavaBeans design
* pattern, for changes in singleton properties. In addition, it fires the
* following <code>ContainerEvent</code> events to listeners who register
* themselves with <code>addContainerListener()</code>:
* <table border=1>
* <tr>
* <th>Type</th>
* <th>Data</th>
* <th>Description</th>
* </tr>
* <tr>
* <td align=center><code>addChild</code></td>
* <td align=center><code>Container</code></td>
* <td>Child container added to this Container.</td>
* </tr>
* <tr>
* <td align=center><code>addValve</code></td>
* <td align=center><code>Valve</code></td>
* <td>Valve added to this Container.</td>
* </tr>
* <tr>
* <td align=center><code>removeChild</code></td>
* <td align=center><code>Container</code></td>
* <td>Child container removed from this Container.</td>
* </tr>
* <tr>
* <td align=center><code>removeValve</code></td>
* <td align=center><code>Valve</code></td>
* <td>Valve removed from this Container.</td>
* </tr>
* <tr>
* <td align=center><code>start</code></td>
* <td align=center><code>null</code></td>
* <td>Container was started.</td>
* </tr>
* <tr>
* <td align=center><code>stop</code></td>
* <td align=center><code>null</code></td>
* <td>Container was stopped.</td>
* </tr>
* </table>
* Subclasses that fire additional events should document them in the
* class comments of the implementation class.
*
* @author Craig R. McClanahan
* @version $Revision: 1.21 $ $Date: 2002/06/09 02:19:42 $
*/
public abstract class ContainerBase
implements Container, Lifecycle, Pipeline {
/**
* Perform addChild with the permissions of this class.
* addChild can be called with the XML parser on the stack,
* this allows the XML parser to have fewer privileges than
* Tomcat.
*/
protected class PrivilegedAddChild
implements PrivilegedAction {
private Container child;
PrivilegedAddChild(Container child) {
this.child = child;
}
public Object run() {
addChildInternal(child);
return null;
}
}
// ----------------------------------------------------- Instance Variables
/**
* The child Containers belonging to this Container, keyed by name.
*/
protected HashMap children = new HashMap();
/**
* The debugging detail level for this component.
*/
protected int debug = 0;
/**
* The lifecycle event support for this component.
*/
protected LifecycleSupport lifecycle = new LifecycleSupport(this);
/**
* The container event listeners for this Container.
*/
protected ArrayList listeners = new ArrayList();
/**
* The Loader implementation with which this Container is associated.
*/
protected Loader loader = null;
/**
* The Logger implementation with which this Container is associated.
*/
protected Logger logger = null;
/**
* The Manager implementation with which this Container is associated.
*/
protected Manager manager = null;
/**
* The cluster with which this Container is associated.
*/
protected Cluster cluster = null;
/**
* The one and only Mapper associated with this Container, if any.
*/
protected Mapper mapper = null;
/**
* The set of Mappers associated with this Container, keyed by protocol.
*/
protected HashMap mappers = new HashMap();
/**
* The Java class name of the default Mapper class for this Container.
*/
protected String mapperClass = null;
/**
* The human-readable name of this Container.
*/
protected String name = null;
/**
* The parent Container to which this Container is a child.
*/
protected Container parent = null;
/**
* The parent class loader to be configured when we install a Loader.
*/
protected ClassLoader parentClassLoader = null;
/**
* The Pipeline object with which this Container is associated.
*/
protected Pipeline pipeline = new StandardPipeline(this);
/**
* The Realm with which this Container is associated.
*/
protected Realm realm = null;
/**
* The resources DirContext object with which this Container is associated.
*/
protected DirContext resources = null;
/**
* The string manager for this package.
*/
protected static StringManager sm =
StringManager.getManager(Constants.Package);
/**
* Has this component been started?
*/
protected boolean started = false;
/**
* The property change support for this component.
*/
protected PropertyChangeSupport support = new PropertyChangeSupport(this);
// ------------------------------------------------------------- Properties
/**
* 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) {
int oldDebug = this.debug;
this.debug = debug;
support.firePropertyChange("debug", new Integer(oldDebug),
new Integer(this.debug));
}
/**
* Return descriptive information about this Container implementation and
* the corresponding version number, in the format
* <code><description>/<version></code>.
*/
public abstract String getInfo();
/**
* Return the Loader with which this Container is associated. If there is
* no associated Loader, return the Loader associated with our parent
* Container (if any); otherwise, return <code>null</code>.
*/
public Loader getLoader() {
if (loader != null)
return (loader);
if (parent != null)
return (parent.getLoader());
return (null);
}
/**
* Set the Loader with which this Container is associated.
*
* @param loader The newly associated loader
*/
public synchronized void setLoader(Loader loader) {
// Change components if necessary
Loader oldLoader = this.loader;
if (oldLoader == loader)
return;
this.loader = loader;
// Stop the old component if necessary
if (started && (oldLoader != null) &&
(oldLoader instanceof Lifecycle)) {
try {
((Lifecycle) oldLoader).stop();
} catch (LifecycleException e) {
log("ContainerBase.setLoader: stop: ", e);
}
}
// Start the new component if necessary
if (loader != null)
loader.setContainer(this);
if (started && (loader != null) &&
(loader instanceof Lifecycle)) {
try {
((Lifecycle) loader).start();
} catch (LifecycleException e) {
log("ContainerBase.setLoader: start: ", e);
}
}
// Report this property change to interested listeners
support.firePropertyChange("loader", oldLoader, this.loader);
}
/**
* Return the Logger with which this Container is associated. If there is
* no associated Logger, return the Logger associated with our parent
* Container (if any); otherwise return <code>null</code>.
*/
public Logger getLogger() {
if (logger != null)
return (logger);
if (parent != null)
return (parent.getLogger());
return (null);
}
/**
* Set the Logger with which this Container is associated.
*
* @param logger The newly associated Logger
*/
public synchronized void setLogger(Logger logger) {
// Change components if necessary
Logger oldLogger = this.logger;
if (oldLogger == logger)
return;
this.logger = logger;
// Stop the old component if necessary
if (started && (oldLogger != null) &&
(oldLogger instanceof Lifecycle)) {
try {
((Lifecycle) oldLogger).stop();
} catch (LifecycleException e) {
log("ContainerBase.setLogger: stop: ", e);
}
}
// Start the new component if necessary
if (logger != null)
logger.setContainer(this);
if (started && (logger != null) &&
(logger instanceof Lifecycle)) {
try {
((Lifecycle) logger).start();
} catch (LifecycleException e) {
log("ContainerBase.setLogger: start: ", e);
}
}
// Report this property change to interested listeners
support.firePropertyChange("logger", oldLogger, this.logger);
}
/**
* Return the Manager with which this Container is associated. If there is
* no associated Manager, return the Manager associated with our parent
* Container (if any); otherwise return <code>null</code>.
*/
public Manager getManager() {
if (manager != null)
return (manager);
if (parent != null)
return (parent.getManager());
return (null);
}
/**
* Set the Manager with which this Container is associated.
*
* @param manager The newly associated Manager
*/
public synchronized void setManager(Manager manager) {
// Change components if necessary
Manager oldManager = this.manager;
if (oldManager == manager)
return;
this.manager = manager;
// Stop the old component if necessary
if (started && (oldManager != null) &&
(oldManager instanceof Lifecycle)) {
try {
((Lifecycle) oldManager).stop();
} catch (LifecycleException e) {
log("ContainerBase.setManager: stop: ", e);
}
}
// Start the new component if necessary
if (manager != null)
manager.setContainer(this);
if (started && (manager != null) &&
(manager instanceof Lifecycle)) {
try {
((Lifecycle) manager).start();
} catch (LifecycleException e) {
log("ContainerBase.setManager: start: ", e);
}
}
// Report this property change to interested listeners
support.firePropertyChange("manager", oldManager, this.manager);
}
/**
* Return the Cluster with which this Container is associated. If there is
* no associated Cluster, return the Cluster associated with our parent
* Container (if any); otherwise return <code>null</code>.
*/
public Cluster getCluster() {
if (cluster != null)
return (cluster);
if (parent != null)
return (parent.getCluster());
return (null);
}
/**
* Set the Cluster with which this Container is associated.
*
* @param manager The newly associated Cluster
*/
public synchronized void setCluster(Cluster cluster) {
// Change components if necessary
Cluster oldCluster = this.cluster;
if (oldCluster == cluster)
return;
this.cluster = cluster;
// Stop the old component if necessary
if (started && (oldCluster != null) &&
(oldCluster instanceof Lifecycle)) {
try {
((Lifecycle) oldCluster).stop();
} catch (LifecycleException e) {
log("ContainerBase.setCluster: stop: ", e);
}
}
// Start the new component if necessary
if (cluster != null)
cluster.setContainer(this);
if (started && (cluster != null) &&
(cluster instanceof Lifecycle)) {
try {
((Lifecycle) cluster).start();
} catch (LifecycleException e) {
log("ContainerBase.setCluster: start: ", e);
}
}
// Report this property change to interested listeners
support.firePropertyChange("cluster", oldCluster, this.cluster);
}
/**
* Return a name string (suitable for use by humans) that describes this
* Container. Within the set of child containers belonging to a particular
* parent, Container names must be unique.
*/
public String getName() {
return (name);
}
/**
* Set a name string (suitable for use by humans) that describes this
* Container. Within the set of child containers belonging to a particular
* parent, Container names must be unique.
*
* @param name New name of this container
*
* @exception IllegalStateException if this Container has already been
* added to the children of a parent Container (after which the name
* may not be changed)
*/
public void setName(String name) {
String oldName = this.name;
this.name = name;
support.firePropertyChange("name", oldName, this.name);
}
/**
* Return the Container for which this Container is a child, if there is
* one. If there is no defined parent, return <code>null</code>.
*/
public Container getParent() {
return (parent);
}
/**
* Set the parent Container to which this Container is being added as a
* child. This Container may refuse to become attached to the specified
* Container by throwing an exception.
*
* @param container Container to which this Container is being added
* as a child
*
* @exception IllegalArgumentException if this Container refuses to become
* attached to the specified Container
*/
public void setParent(Container container) {
Container oldParent = this.parent;
this.parent = container;
support.firePropertyChange("parent", oldParent, this.parent);
}
/**
* Return the parent class loader (if any) for this web application.
* This call is meaningful only <strong>after</strong> a Loader has
* been configured.
*/
public ClassLoader getParentClassLoader() {
if (parentClassLoader != null)
return (parentClassLoader);
if (parent != null)
return (parent.getParentClassLoader());
return (ClassLoader.getSystemClassLoader());
}
/**
* Set the parent class loader (if any) for this web application.
* This call is meaningful only <strong>before</strong> a Loader has
* been configured, and the specified value (if non-null) should be
* passed as an argument to the class loader constructor.
*
*
* @param parent The new parent class loader
*/
public void setParentClassLoader(ClassLoader parent) {
ClassLoader oldParentClassLoader = this.parentClassLoader;
this.parentClassLoader = parent;
support.firePropertyChange("parentClassLoader", oldParentClassLoader,
this.parentClassLoader);
}
/**
* Return the Pipeline object that manages the Valves associated with
* this Container.
*/
public Pipeline getPipeline() {
return (this.pipeline);
}
/**
* Return the Realm with which this Container is associated. If there is
* no associated Realm, return the Realm associated with our parent
* Container (if any); otherwise return <code>null</code>.
*/
public Realm getRealm() {
if (realm != null)
return (realm);
if (parent != null)
return (parent.getRealm());
return (null);
}
/**
* Set the Realm with which this Container is associated.
*
* @param realm The newly associated Realm
*/
public synchronized void setRealm(Realm realm) {
// Change components if necessary
Realm oldRealm = this.realm;
if (oldRealm == realm)
return;
this.realm = realm;
// Stop the old component if necessary
if (started && (oldRealm != null) &&
(oldRealm instanceof Lifecycle)) {
try {
((Lifecycle) oldRealm).stop();
} catch (LifecycleException e) {
log("ContainerBase.setRealm: stop: ", e);
}
}
// Start the new component if necessary
if (realm != null)
realm.setContainer(this);
if (started && (realm != null) &&
(realm instanceof Lifecycle)) {
try {
((Lifecycle) realm).start();
} catch (LifecycleException e) {
log("ContainerBase.setRealm: start: ", e);
}
}
// Report this property change to interested listeners
support.firePropertyChange("realm", oldRealm, this.realm);
}
/**
* Return the resources DirContext object with which this Container is
* associated. If there is no associated resources object, return the
* resources associated with our parent Container (if any); otherwise
* return <code>null</code>.
*/
public DirContext getResources() {
if (resources != null)
return (resources);
if (parent != null)
return (parent.getResources());
return (null);
}
/**
* Set the resources DirContext object with which this Container is
* associated.
*
* @param resources The newly associated DirContext
*/
public synchronized void setResources(DirContext resources) {
// Change components if necessary
DirContext oldResources = this.resources;
if (oldResources == resources)
return;
Hashtable env = new Hashtable();
if (getParent() != null)
env.put(ProxyDirContext.HOST, getParent().getName());
env.put(ProxyDirContext.CONTEXT, getName());
this.resources = new ProxyDirContext(env, resources);
// Report this property change to interested listeners
support.firePropertyChange("resources", oldResources, this.resources);
}
// ------------------------------------------------------ Container Methods
/**
* Add a new child Container to those associated with this Container,
* if supported. Prior to adding this Container to the set of children,
* the child's <code>setParent()</code> method must be called, with this
* Container as an argument. This method may thrown an
* <code>IllegalArgumentException</code> if this Container chooses not
* to be attached to the specified Container, in which case it is not added
*
* @param child New child Container to be added
*
* @exception IllegalArgumentException if this exception is thrown by
* the <code>setParent()</code> method of the child Container
* @exception IllegalArgumentException if the new child does not have
* a name unique from that of existing children of this Container
* @exception IllegalStateException if this Container does not support
* child Containers
*/
public void addChild(Container child) {
if (System.getSecurityManager() != null) {
PrivilegedAction dp =
new PrivilegedAddChild(child);
AccessController.doPrivileged(dp);
} else {
addChildInternal(child);
}
}
private void addChildInternal(Container child) {
synchronized(children) {
if (children.get(child.getName()) != null)
throw new IllegalArgumentException("addChild: Child name '" +
child.getName() +
"' is not unique");
child.setParent((Container) this); // May throw IAE
if (started && (child instanceof Lifecycle)) {
try {
((Lifecycle) child).start();
} catch (LifecycleException e) {
log("ContainerBase.addChild: start: ", e);
throw new IllegalStateException
("ContainerBase.addChild: start: " + e);
}
}
children.put(child.getName(), child);
fireContainerEvent(ADD_CHILD_EVENT, child);
}
}
/**
* Add a container event listener to this component.
*
* @param listener The listener to add
*/
public void addContainerListener(ContainerListener listener) {
synchronized (listeners) {
listeners.add(listener);
}
}
/**
* Add the specified Mapper associated with this Container.
*
* @param mapper The corresponding Mapper implementation
*
* @exception IllegalArgumentException if this exception is thrown by
* the <code>setContainer()</code> method of the Mapper
*/
public void addMapper(Mapper mapper) {
synchronized(mappers) {
if (mappers.get(mapper.getProtocol()) != null)
throw new IllegalArgumentException("addMapper: Protocol '" +
mapper.getProtocol() +
"' is not unique");
mapper.setContainer((Container) this); // May throw IAE
if (started && (mapper instanceof Lifecycle)) {
try {
((Lifecycle) mapper).start();
} catch (LifecycleException e) {
log("ContainerBase.addMapper: start: ", e);
throw new IllegalStateException
("ContainerBase.addMapper: start: " + e);
}
}
mappers.put(mapper.getProtocol(), mapper);
if (mappers.size() == 1)
this.mapper = mapper;
else
this.mapper = null;
fireContainerEvent(ADD_MAPPER_EVENT, mapper);
}
}
/**
* Add a property change listener to this component.
*
* @param listener The listener to add
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
support.addPropertyChangeListener(listener);
}
/**
* Return the child Container, associated with this Container, with
* the specified name (if any); otherwise, return <code>null</code>
*
* @param name Name of the child Container to be retrieved
*/
public Container findChild(String name) {
if (name == null)
return (null);
synchronized (children) { // Required by post-start changes
return ((Container) children.get(name));
}
}
/**
* Return the set of children Containers associated with this Container.
* If this Container has no children, a zero-length array is returned.
*/
public Container[] findChildren() {
synchronized (children) {
Container results[] = new Container[children.size()];
return ((Container[]) children.values().toArray(results));
}
}
/**
* Return the set of container listeners associated with this Container.
* If this Container has no registered container listeners, a zero-length
* array is returned.
*/
public ContainerListener[] findContainerListeners() {
synchronized (listeners) {
ContainerListener[] results =
new ContainerListener[listeners.size()];
return ((ContainerListener[]) listeners.toArray(results));
}
}
/**
* Return the Mapper associated with the specified protocol, if there
* is one. If there is only one defined Mapper, use it for all protocols.
* If there is no matching Mapper, return <code>null</code>.
*
* @param protocol Protocol for which to find a Mapper
*/
public Mapper findMapper(String protocol) {
if (mapper != null)
return (mapper);
else
synchronized (mappers) {
return ((Mapper) mappers.get(protocol));
}
}
/**
* Return the set of Mappers associated with this Container. If this
* Container has no Mappers, a zero-length array is returned.
*/
public Mapper[] findMappers() {
synchronized (mappers) {
Mapper results[] = new Mapper[mappers.size()];
return ((Mapper[]) mappers.values().toArray(results));
}
}
/**
* Process the specified Request, to produce the corresponding Response,
* by invoking the first Valve in our pipeline (if any), or the basic
* Valve otherwise.
*
* @param request Request to be processed
* @param response Response to be produced
*
* @exception IllegalStateException if neither a pipeline or a basic
* Valve have been configured for this Container
* @exception IOException if an input/output error occurred while
* processing
* @exception ServletException if a ServletException was thrown
* while processing this request
*/
public void invoke(Request request, Response response)
throws IOException, ServletException {
pipeline.invoke(request, response);
}
/**
* Return the child Container that should be used to process this Request,
* based upon its characteristics. If no such child Container can be
* identified, return <code>null</code> instead.
*
* @param request Request being processed
* @param update Update the Request to reflect the mapping selection?
*/
public Container map(Request request, boolean update) {
// Select the Mapper we will use
Mapper mapper = findMapper(request.getRequest().getProtocol());
if (mapper == null)
return (null);
// Use this Mapper to perform this mapping
return (mapper.map(request, update));
}
/**
* Remove an existing child Container from association with this parent
* Container.
*
* @param child Existing child Container to be removed
*/
public void removeChild(Container child) {
synchronized(children) {
if (children.get(child.getName()) == null)
return;
children.remove(child.getName());
}
if (started && (child instanceof Lifecycle)) {
try {
((Lifecycle) child).stop();
} catch (LifecycleException e) {
log("ContainerBase.removeChild: stop: ", e);
}
}
fireContainerEvent(REMOVE_CHILD_EVENT, child);
child.setParent(null);
}
/**
* Remove a container event listener from this component.
*
* @param listener The listener to remove
*/
public void removeContainerListener(ContainerListener listener) {
synchronized (listeners) {
listeners.remove(listener);
}
}
/**
* Remove a Mapper associated with this Container, if any.
*
* @param mapper The Mapper to be removed
*/
public void removeMapper(Mapper mapper) {
synchronized(mappers) {
if (mappers.get(mapper.getProtocol()) == null)
return;
mappers.remove(mapper.getProtocol());
if (started && (mapper instanceof Lifecycle)) {
try {
((Lifecycle) mapper).stop();
} catch (LifecycleException e) {
log("ContainerBase.removeMapper: stop: ", e);
throw new IllegalStateException
("ContainerBase.removeMapper: stop: " + e);
}
}
if (mappers.size() != 1)
this.mapper = null;
else {
Iterator values = mappers.values().iterator();
this.mapper = (Mapper) values.next();
}
fireContainerEvent(REMOVE_MAPPER_EVENT, mapper);
}
}
/**
* Remove a property change listener from this component.
*
* @param listener The listener to remove
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
support.removePropertyChangeListener(listener);
}
// ------------------------------------------------------ Lifecycle Methods
/**
* Add a lifecycle event listener to this component.
*
* @param listener The listener to add
*/
public void addLifecycleListener(LifecycleListener listener) {
lifecycle.addLifecycleListener(listener);
}
/**
* Get the lifecycle listeners associated with this lifecycle. If this
* Lifecycle has no listeners registered, a zero-length array is returned.
*/
public LifecycleListener[] findLifecycleListeners() {
return lifecycle.findLifecycleListeners();
}
/**
* Remove a lifecycle event listener from this component.
*
* @param listener The listener to remove
*/
public void removeLifecycleListener(LifecycleListener listener) {
lifecycle.removeLifecycleListener(listener);
}
/**
* Prepare for active use of the public methods of this Component.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents it from being started
*/
public synchronized void start() throws LifecycleException {
// Validate and update our current component state
if (started)
throw new LifecycleException
(sm.getString("containerBase.alreadyStarted", logName()));
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(BEFORE_START_EVENT, null);
addDefaultMapper(this.mapperClass);
started = true;
// Start our subordinate components, if any
if ((loader != null) && (loader instanceof Lifecycle))
((Lifecycle) loader).start();
if ((logger != null) && (logger instanceof Lifecycle))
((Lifecycle) logger).start();
if ((manager != null) && (manager instanceof Lifecycle))
((Lifecycle) manager).start();
if ((cluster != null) && (cluster instanceof Lifecycle))
((Lifecycle) cluster).start();
if ((realm != null) && (realm instanceof Lifecycle))
((Lifecycle) realm).start();
if ((resources != null) && (resources instanceof Lifecycle))
((Lifecycle) resources).start();
// Start our Mappers, if any
Mapper mappers[] = findMappers();
for (int i = 0; i < mappers.length; i++) {
if (mappers[i] instanceof Lifecycle)
((Lifecycle) mappers[i]).start();
}
// Start our child containers, if any
Container children[] = findChildren();
for (int i = 0; i < children.length; i++) {
if (children[i] instanceof Lifecycle)
((Lifecycle) children[i]).start();
}
// Start the Valves in our pipeline (including the basic), if any
if (pipeline instanceof Lifecycle)
((Lifecycle) pipeline).start();
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(START_EVENT, null);
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(AFTER_START_EVENT, null);
}
/**
* Gracefully shut down active use of the public methods of this Component.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
public synchronized void stop() throws LifecycleException {
// Validate and update our current component state
if (!started)
throw new LifecycleException
(sm.getString("containerBase.notStarted", logName()));
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(BEFORE_STOP_EVENT, null);
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(STOP_EVENT, null);
started = false;
// Stop the Valves in our pipeline (including the basic), if any
if (pipeline instanceof Lifecycle) {
((Lifecycle) pipeline).stop();
}
// Stop our child containers, if any
Container children[] = findChildren();
for (int i = 0; i < children.length; i++) {
if (children[i] instanceof Lifecycle)
((Lifecycle) children[i]).stop();
}
// Stop our Mappers, if any
Mapper mappers[] = findMappers();
for (int i = 0; i < mappers.length; i++) {
if (mappers[(mappers.length-1)-i] instanceof Lifecycle)
((Lifecycle) mappers[(mappers.length-1)-i]).stop();
}
// Stop our subordinate components, if any
if ((resources != null) && (resources instanceof Lifecycle)) {
((Lifecycle) resources).stop();
}
if ((realm != null) && (realm instanceof Lifecycle)) {
((Lifecycle) realm).stop();
}
if ((cluster != null) && (cluster instanceof Lifecycle)) {
((Lifecycle) cluster).stop();
}
if ((manager != null) && (manager instanceof Lifecycle)) {
((Lifecycle) manager).stop();
}
if ((logger != null) && (logger instanceof Lifecycle)) {
((Lifecycle) logger).stop();
}
if ((loader != null) && (loader instanceof Lifecycle)) {
((Lifecycle) loader).stop();
}
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(AFTER_STOP_EVENT, null);
}
// ------------------------------------------------------- Pipeline Methods
/**
* Add a new Valve to the end of the pipeline associated with this
* Container. Prior to adding the Valve, the Valve's
* <code>setContainer</code> method must be called, with this Container
* as an argument. The method may throw an
* <code>IllegalArgumentException</code> if this Valve chooses not to
* be associated with this Container, or <code>IllegalStateException</code>
* if it is already associated with a different Container.
*
* @param valve Valve to be added
*
* @exception IllegalArgumentException if this Container refused to
* accept the specified Valve
* @exception IllegalArgumentException if the specifie Valve refuses to be
* associated with this Container
* @exception IllegalStateException if the specified Valve is already
* associated with a different Container
*/
public synchronized void addValve(Valve valve) {
pipeline.addValve(valve);
fireContainerEvent(ADD_VALVE_EVENT, valve);
}
/**
* <p>Return the Valve instance that has been distinguished as the basic
* Valve for this Pipeline (if any).
*/
public Valve getBasic() {
return (pipeline.getBasic());
}
/**
* Return the set of Valves in the pipeline associated with this
* Container, including the basic Valve (if any). If there are no
* such Valves, a zero-length array is returned.
*/
public Valve[] getValves() {
return (pipeline.getValves());
}
/**
* Remove the specified Valve from the pipeline associated with this
* Container, if it is found; otherwise, do nothing.
*
* @param valve Valve to be removed
*/
public synchronized void removeValve(Valve valve) {
pipeline.removeValve(valve);
fireContainerEvent(REMOVE_VALVE_EVENT, valve);
}
/**
* <p>Set the Valve instance that has been distinguished as the basic
* Valve for this Pipeline (if any). Prioer to setting the basic Valve,
* the Valve's <code>setContainer()</code> will be called, if it
* implements <code>Contained</code>, with the owning Container as an
* argument. The method may throw an <code>IllegalArgumentException</code>
* if this Valve chooses not to be associated with this Container, or
* <code>IllegalStateException</code> if it is already associated with
* a different Container.</p>
*
* @param valve Valve to be distinguished as the basic Valve
*/
public void setBasic(Valve valve) {
pipeline.setBasic(valve);
}
// ------------------------------------------------------ Protected Methods
/**
* Add a default Mapper implementation if none have been configured
* explicitly.
*
* @param mapperClass Java class name of the default Mapper
*/
protected void addDefaultMapper(String mapperClass) {
// Do we need a default Mapper?
if (mapperClass == null)
return;
if (mappers.size() >= 1)
return;
// Instantiate and add a default Mapper
try {
Class clazz = Class.forName(mapperClass);
Mapper mapper = (Mapper) clazz.newInstance();
mapper.setProtocol("http");
addMapper(mapper);
} catch (Exception e) {
log(sm.getString("containerBase.addDefaultMapper", mapperClass),
e);
}
}
/**
* Notify all container event listeners that a particular event has
* occurred for this Container. The default implementation performs
* this notification synchronously using the calling thread.
*
* @param type Event type
* @param data Event data
*/
public void fireContainerEvent(String type, Object data) {
if (listeners.size() < 1)
return;
ContainerEvent event = new ContainerEvent(this, type, data);
ContainerListener list[] = new ContainerListener[0];
synchronized (listeners) {
list = (ContainerListener[]) listeners.toArray(list);
}
for (int i = 0; i < list.length; i++)
((ContainerListener) list[i]).containerEvent(event);
}
/**
* Log the specified message to our current Logger (if any).
*
* @param message Message to be logged
*/
protected void log(String message) {
Logger logger = getLogger();
if (logger != null)
logger.log(logName() + ": " + message);
else
System.out.println(logName() + ": " + message);
}
/**
* Log the specified message and exception to our current Logger
* (if any).
*
* @param message Message to be logged
* @param throwable Related exception
*/
protected void log(String message, Throwable throwable) {
Logger logger = getLogger();
if (logger != null)
logger.log(logName() + ": " + message, throwable);
else {
System.out.println(logName() + ": " + message + ": " + throwable);
throwable.printStackTrace(System.out);
}
}
/**
* Return the abbreviated name of this container for logging messsages
*/
protected String logName() {
String className = this.getClass().getName();
int period = className.lastIndexOf(".");
if (period >= 0)
className = className.substring(period + 1);
return (className + "[" + getName() + "]");
}
}