/*
* 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.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import javax.management.MBeanRegistration;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import org.apache.catalina.Container;
import org.apache.catalina.Engine;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Server;
import org.apache.catalina.Service;
import org.apache.catalina.ServerFactory;
import org.apache.catalina.connector.Connector;
import org.apache.catalina.util.LifecycleSupport;
import org.apache.catalina.util.StringManager;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.modeler.Registry;
import java.util.ArrayList;
import org.apache.catalina.Executor;
/**
* Standard implementation of the <code>Service</code> interface. The
* associated Container is generally an instance of Engine, but this is
* not required.
*
* @author Craig R. McClanahan
*/
public class StandardService
implements Lifecycle, Service, MBeanRegistration
{
private static Log log = LogFactory.getLog(StandardService.class);
// ----------------------------------------------------- Instance Variables
/**
* Descriptive information about this component implementation.
*/
private static final String info =
"org.apache.catalina.core.StandardService/1.0";
/**
* The name of this service.
*/
private String name = null;
/**
* The lifecycle event support for this component.
*/
private LifecycleSupport lifecycle = new LifecycleSupport(this);
/**
* The string manager for this package.
*/
private static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The <code>Server</code> that owns this Service, if any.
*/
private Server server = null;
/**
* Has this component been started?
*/
private boolean started = false;
/**
* The property change support for this component.
*/
protected PropertyChangeSupport support = new PropertyChangeSupport(this);
/**
* The set of Connectors associated with this Service.
*/
protected Connector connectors[] = new Connector[0];
/**
*
*/
protected ArrayList<Executor> executors = new ArrayList<Executor>();
/**
* The Container associated with this Service. (In the case of the
* org.apache.catalina.startup.Embedded subclass, this holds the most
* recently added Engine.)
*/
protected Container container = null;
/**
* Has this component been initialized?
*/
protected boolean initialized = false;
// ------------------------------------------------------------- Properties
/**
* Return the <code>Container</code> that handles requests for all
* <code>Connectors</code> associated with this Service.
*/
public Container getContainer() {
return (this.container);
}
/**
* Set the <code>Container</code> that handles requests for all
* <code>Connectors</code> associated with this Service.
*
* @param container The new Container
*/
public void setContainer(Container container) {
Container oldContainer = this.container;
if ((oldContainer != null) && (oldContainer instanceof Engine))
((Engine) oldContainer).setService(null);
this.container = container;
if ((this.container != null) && (this.container instanceof Engine))
((Engine) this.container).setService(this);
if (started && (this.container != null) &&
(this.container instanceof Lifecycle)) {
try {
((Lifecycle) this.container).start();
} catch (LifecycleException e) {
;
}
}
synchronized (connectors) {
for (int i = 0; i < connectors.length; i++)
connectors[i].setContainer(this.container);
}
if (started && (oldContainer != null) &&
(oldContainer instanceof Lifecycle)) {
try {
((Lifecycle) oldContainer).stop();
} catch (LifecycleException e) {
;
}
}
// Report this property change to interested listeners
support.firePropertyChange("container", oldContainer, this.container);
}
public ObjectName getContainerName() {
if( container instanceof ContainerBase ) {
return ((ContainerBase)container).getJmxName();
}
return null;
}
/**
* Return descriptive information about this Service implementation and
* the corresponding version number, in the format
* <code><description>/<version></code>.
*/
public String getInfo() {
return (info);
}
/**
* Return the name of this Service.
*/
public String getName() {
return (this.name);
}
/**
* Set the name of this Service.
*
* @param name The new service name
*/
public void setName(String name) {
this.name = name;
}
/**
* Return the <code>Server</code> with which we are associated (if any).
*/
public Server getServer() {
return (this.server);
}
/**
* Set the <code>Server</code> with which we are associated (if any).
*
* @param server The server that owns this Service
*/
public void setServer(Server server) {
this.server = server;
}
// --------------------------------------------------------- Public Methods
/**
* Add a new Connector to the set of defined Connectors, and associate it
* with this Service's Container.
*
* @param connector The Connector to be added
*/
public void addConnector(Connector connector) {
synchronized (connectors) {
connector.setContainer(this.container);
connector.setService(this);
Connector results[] = new Connector[connectors.length + 1];
System.arraycopy(connectors, 0, results, 0, connectors.length);
results[connectors.length] = connector;
connectors = results;
if (initialized) {
try {
connector.initialize();
} catch (LifecycleException e) {
log.error("Connector.initialize", e);
}
}
if (started && (connector instanceof Lifecycle)) {
try {
((Lifecycle) connector).start();
} catch (LifecycleException e) {
log.error("Connector.start", e);
}
}
// Report this property change to interested listeners
support.firePropertyChange("connector", null, connector);
}
}
public ObjectName[] getConnectorNames() {
ObjectName results[] = new ObjectName[connectors.length];
for (int i=0; i<results.length; i++) {
results[i] = connectors[i].getObjectName();
}
return results;
}
/**
* Add a property change listener to this component.
*
* @param listener The listener to add
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
support.addPropertyChangeListener(listener);
}
/**
* Find and return the set of Connectors associated with this Service.
*/
public Connector[] findConnectors() {
return (connectors);
}
/**
* Remove the specified Connector from the set associated from this
* Service. The removed Connector will also be disassociated from our
* Container.
*
* @param connector The Connector to be removed
*/
public void removeConnector(Connector connector) {
synchronized (connectors) {
int j = -1;
for (int i = 0; i < connectors.length; i++) {
if (connector == connectors[i]) {
j = i;
break;
}
}
if (j < 0)
return;
if (started && (connectors[j] instanceof Lifecycle)) {
try {
((Lifecycle) connectors[j]).stop();
} catch (LifecycleException e) {
log.error("Connector.stop", e);
}
}
connectors[j].setContainer(null);
connector.setService(null);
int k = 0;
Connector results[] = new Connector[connectors.length - 1];
for (int i = 0; i < connectors.length; i++) {
if (i != j)
results[k++] = connectors[i];
}
connectors = results;
// Report this property change to interested listeners
support.firePropertyChange("connector", connector, null);
}
}
/**
* Remove a property change listener from this component.
*
* @param listener The listener to remove
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
support.removePropertyChangeListener(listener);
}
/**
* Return a String representation of this component.
*/
public String toString() {
StringBuffer sb = new StringBuffer("StandardService[");
sb.append(getName());
sb.append("]");
return (sb.toString());
}
// ------------------------------------------------------ Lifecycle Methods
/**
* Add a LifecycleEvent 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 LifecycleEvent listener from this component.
*
* @param listener The listener to remove
*/
public void removeLifecycleListener(LifecycleListener listener) {
lifecycle.removeLifecycleListener(listener);
}
/**
* Adds a named executor to the service
* @param ex Executor
*/
public void addExecutor(Executor ex) {
synchronized (executors) {
if (!executors.contains(ex)) {
executors.add(ex);
if (started)
try {
ex.start();
} catch (LifecycleException x) {
log.error("Executor.start", x);
}
}
}
}
/**
* Retrieves all executors
* @return Executor[]
*/
public Executor[] findExecutors() {
synchronized (executors) {
Executor[] arr = new Executor[executors.size()];
executors.toArray(arr);
return arr;
}
}
/**
* Retrieves executor by name, null if not found
* @param name String
* @return Executor
*/
public Executor getExecutor(String name) {
synchronized (executors) {
for (int i = 0; i < executors.size(); i++) {
if (name.equals(executors.get(i).getName()))
return executors.get(i);
}
}
return null;
}
/**
* Removes an executor from the service
* @param ex Executor
*/
public void removeExecutor(Executor ex) {
synchronized (executors) {
if ( executors.remove(ex) && started ) {
try {
ex.stop();
} catch (LifecycleException e) {
log.error("Executor.stop", e);
}
}
}
}
/**
* Prepare for the beginning of active use of the public methods of this
* component. This method should be called before any of the public
* methods of this component are utilized. It should also send a
* LifecycleEvent of type START_EVENT to any registered listeners.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents this component from being used
*/
public void start() throws LifecycleException {
// Validate and update our current component state
if (log.isInfoEnabled() && started) {
log.info(sm.getString("standardService.start.started"));
}
if( ! initialized )
init();
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(BEFORE_START_EVENT, null);
if(log.isInfoEnabled())
log.info(sm.getString("standardService.start.name", this.name));
lifecycle.fireLifecycleEvent(START_EVENT, null);
started = true;
// Start our defined Container first
if (container != null) {
synchronized (container) {
if (container instanceof Lifecycle) {
((Lifecycle) container).start();
}
}
}
synchronized (executors) {
for ( int i=0; i<executors.size(); i++ ) {
executors.get(i).start();
}
}
// Start our defined Connectors second
synchronized (connectors) {
for (int i = 0; i < connectors.length; i++) {
if (connectors[i] instanceof Lifecycle)
((Lifecycle) connectors[i]).start();
}
}
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(AFTER_START_EVENT, null);
}
/**
* Gracefully terminate the active use of the public methods of this
* component. This method should be the last one called on a given
* instance of this component. It should also send a LifecycleEvent
* of type STOP_EVENT to any registered listeners.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
public void stop() throws LifecycleException {
// Validate and update our current component state
if (!started) {
return;
}
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(BEFORE_STOP_EVENT, null);
// Stop our defined Connectors first
synchronized (connectors) {
for (int i = 0; i < connectors.length; i++) {
connectors[i].pause();
}
}
// Heuristic: Sleep for a while to ensure pause of the connector
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// Ignore
}
lifecycle.fireLifecycleEvent(STOP_EVENT, null);
if(log.isInfoEnabled())
log.info
(sm.getString("standardService.stop.name", this.name));
started = false;
// Stop our defined Container second
if (container != null) {
synchronized (container) {
if (container instanceof Lifecycle) {
((Lifecycle) container).stop();
}
}
}
// FIXME pero -- Why container stop first? KeepAlive connetions can send request!
// Stop our defined Connectors first
synchronized (connectors) {
for (int i = 0; i < connectors.length; i++) {
if (connectors[i] instanceof Lifecycle)
((Lifecycle) connectors[i]).stop();
}
}
synchronized (executors) {
for ( int i=0; i<executors.size(); i++ ) {
executors.get(i).stop();
}
}
if( oname==controller ) {
// we registered ourself on init().
// That should be the typical case - this object is just for
// backward compat, nobody should bother to load it explicitely
Registry.getRegistry(null, null).unregisterComponent(oname);
Executor[] executors = findExecutors();
for (int i = 0; i < executors.length; i++) {
try {
ObjectName executorObjectName =
new ObjectName(domain + ":type=Executor,name=" + executors[i].getName());
Registry.getRegistry(null, null).unregisterComponent(executorObjectName);
} catch (Exception e) {
// Ignore (invalid ON, which cannot happen)
}
}
}
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(AFTER_STOP_EVENT, null);
}
/**
* Invoke a pre-startup initialization. This is used to allow connectors
* to bind to restricted ports under Unix operating environments.
*/
public void initialize()
throws LifecycleException
{
// Service shouldn't be used with embeded, so it doesn't matter
if (initialized) {
if(log.isInfoEnabled())
log.info(sm.getString("standardService.initialize.initialized"));
return;
}
initialized = true;
if( oname==null ) {
try {
// Hack - Server should be deprecated...
Container engine=this.getContainer();
domain=engine.getName();
oname=new ObjectName(domain + ":type=Service,serviceName="+name);
this.controller=oname;
Registry.getRegistry(null, null)
.registerComponent(this, oname, null);
Executor[] executors = findExecutors();
for (int i = 0; i < executors.length; i++) {
ObjectName executorObjectName =
new ObjectName(domain + ":type=Executor,name=" + executors[i].getName());
Registry.getRegistry(null, null)
.registerComponent(executors[i], executorObjectName, null);
}
} catch (Exception e) {
log.error(sm.getString("standardService.register.failed",domain),e);
}
}
if( server==null ) {
// Register with the server
// HACK: ServerFactory should be removed...
ServerFactory.getServer().addService(this);
}
// Initialize our defined Connectors
synchronized (connectors) {
for (int i = 0; i < connectors.length; i++) {
connectors[i].initialize();
}
}
}
public void destroy() throws LifecycleException {
if( started ) stop();
// FIXME unregister should be here probably -- stop doing that ?
}
public void init() {
try {
initialize();
} catch( Throwable t ) {
log.error(sm.getString("standardService.initialize.failed",domain),t);
}
}
protected String type;
protected String domain;
protected String suffix;
protected ObjectName oname;
protected ObjectName controller;
protected MBeanServer mserver;
public ObjectName getObjectName() {
return oname;
}
public String getDomain() {
return domain;
}
public ObjectName preRegister(MBeanServer server,
ObjectName name) throws Exception {
oname=name;
mserver=server;
domain=name.getDomain();
return name;
}
public void postRegister(Boolean registrationDone) {
}
public void preDeregister() throws Exception {
}
public void postDeregister() {
}
}
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