/*
* 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.connector;
import java.util.Iterator;
import java.util.Set;
import javax.management.MBeanServer;
import javax.management.MBeanServerNotification;
import javax.management.Notification;
import javax.management.NotificationListener;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.http.mapper.Mapper;
import org.apache.tomcat.util.modeler.Registry;
import org.apache.tomcat.util.res.StringManager;
/**
* Mapper listener.
*
* @author Remy Maucherat
* @author Costin Manolache
*/
public class MapperListener
implements NotificationListener
{
private static Log log = LogFactory.getLog(MapperListener.class);
// ----------------------------------------------------- Instance Variables
/**
* Associated mapper.
*/
protected Mapper mapper = null;
/**
* MBean server.
*/
protected MBeanServer mBeanServer = null;
/**
* The string manager for this package.
*/
private StringManager sm =
StringManager.getManager(Constants.Package);
// It should be null - and fail if not set
private String domain="*";
private String engine="*";
// ----------------------------------------------------------- Constructors
/**
* Create mapper listener.
*/
public MapperListener(Mapper mapper) {
this.mapper = mapper;
}
// --------------------------------------------------------- Public Methods
public String getDomain() {
return domain;
}
public void setDomain(String domain) {
this.domain = domain;
}
public String getEngine() {
return engine;
}
public void setEngine(String engine) {
this.engine = engine;
}
/**
* Initialize associated mapper.
*/
public void init() {
try {
mBeanServer = Registry.getRegistry(null, null).getMBeanServer();
registerEngine();
// Query hosts
String onStr = domain + ":type=Host,*";
ObjectName objectName = new ObjectName(onStr);
Set set = mBeanServer.queryMBeans(objectName, null);
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
ObjectInstance oi = (ObjectInstance) iterator.next();
registerHost(oi.getObjectName());
}
// Query contexts
onStr = "*:j2eeType=WebModule,*";
objectName = new ObjectName(onStr);
set = mBeanServer.queryMBeans(objectName, null);
iterator = set.iterator();
while (iterator.hasNext()) {
ObjectInstance oi = (ObjectInstance) iterator.next();
registerContext(oi.getObjectName());
}
// Query wrappers
onStr = "*:j2eeType=Servlet,*";
objectName = new ObjectName(onStr);
set = mBeanServer.queryMBeans(objectName, null);
iterator = set.iterator();
while (iterator.hasNext()) {
ObjectInstance oi = (ObjectInstance) iterator.next();
registerWrapper(oi.getObjectName());
}
onStr = "JMImplementation:type=MBeanServerDelegate";
objectName = new ObjectName(onStr);
mBeanServer.addNotificationListener(objectName, this, null, null);
} catch (Exception e) {
log.warn("Error registering contexts",e);
}
}
/**
* unregister this from JMImplementation:type=MBeanServerDelegate
*/
public void destroy() {
try {
ObjectName objectName = new ObjectName(
"JMImplementation:type=MBeanServerDelegate");
mBeanServer.removeNotificationListener(objectName, this);
} catch (Exception e) {
log.warn("Error unregistering MBeanServerDelegate", e);
}
}
// ------------------------------------------- NotificationListener Methods
public void handleNotification(Notification notification,
java.lang.Object handback) {
if (notification instanceof MBeanServerNotification) {
ObjectName objectName =
((MBeanServerNotification) notification).getMBeanName();
String j2eeType = objectName.getKeyProperty("j2eeType");
String engineName = null;
if (j2eeType != null) {
if ((j2eeType.equals("WebModule")) ||
(j2eeType.equals("Servlet"))) {
if (mBeanServer.isRegistered(objectName)) {
try {
engineName = (String)
mBeanServer.getAttribute(objectName, "engineName");
} catch (Exception e) {
// Ignore
}
}
}
}
// At deployment time, engineName is always = null.
if ( (!"*".equals(domain)) &&
( !domain.equals(objectName.getDomain()) ) &&
( (!domain.equals(engineName) ) &&
(engineName != null) ) ) {
return;
}
if(log.isDebugEnabled())
log.debug( "Handle " + objectName + " type : " + notification.getType());
if (notification.getType().equals
(MBeanServerNotification.REGISTRATION_NOTIFICATION)) {
String type=objectName.getKeyProperty("type");
if( "Host".equals( type ) && domain.equals(objectName.getDomain())) {
try {
registerHost(objectName);
} catch (Exception e) {
log.warn("Error registering Host " + objectName, e);
}
}
if (j2eeType != null) {
if (j2eeType.equals("WebModule")) {
try {
registerContext(objectName);
} catch (Throwable t) {
log.warn("Error registering Context " + objectName,t);
}
} else if (j2eeType.equals("Servlet")) {
try {
registerWrapper(objectName);
} catch (Throwable t) {
log.warn("Error registering Wrapper " + objectName,t);
}
}
}
} else if (notification.getType().equals
(MBeanServerNotification.UNREGISTRATION_NOTIFICATION)) {
String type=objectName.getKeyProperty("type");
if( "Host".equals( type )&& domain.equals(objectName.getDomain())) {
try {
unregisterHost(objectName);
} catch (Exception e) {
log.warn("Error unregistering Host " + objectName,e);
}
}
if (j2eeType != null) {
if (j2eeType.equals("WebModule")) {
try {
unregisterContext(objectName);
} catch (Throwable t) {
log.warn("Error unregistering webapp " + objectName,t);
}
}
}
}
}
}
// ------------------------------------------------------ Protected Methods
private void registerEngine()
throws Exception
{
ObjectName engineName = new ObjectName
(domain + ":type=Engine");
if ( ! mBeanServer.isRegistered(engineName)) return;
String defaultHost =
(String) mBeanServer.getAttribute(engineName, "defaultHost");
ObjectName hostName = new ObjectName
(domain + ":type=Host," + "host=" + defaultHost);
if (!mBeanServer.isRegistered(hostName)) {
// Get the hosts' list
String onStr = domain + ":type=Host,*";
ObjectName objectName = new ObjectName(onStr);
Set set = mBeanServer.queryMBeans(objectName, null);
Iterator iterator = set.iterator();
String[] aliases;
boolean isRegisteredWithAlias = false;
while (iterator.hasNext()) {
if (isRegisteredWithAlias) break;
ObjectInstance oi = (ObjectInstance) iterator.next();
hostName = oi.getObjectName();
aliases = (String[])
mBeanServer.invoke(hostName, "findAliases", null, null);
for (int i=0; i < aliases.length; i++){
if (aliases[i].equalsIgnoreCase(defaultHost)){
isRegisteredWithAlias = true;
break;
}
}
}
if (!isRegisteredWithAlias && log.isWarnEnabled())
log.warn(sm.getString("mapperListener.unknownDefaultHost", defaultHost));
}
// This should probablt be called later
if( defaultHost != null ) {
mapper.setDefaultHostName(defaultHost);
}
}
/**
* Register host.
*/
private void registerHost(ObjectName objectName)
throws Exception {
String name=objectName.getKeyProperty("host");
if( name != null ) {
String[] aliases = (String[])
mBeanServer.invoke(objectName, "findAliases", null, null);
mapper.addHost(name, aliases, objectName);
if(log.isDebugEnabled())
log.debug(sm.getString
("mapperListener.registerHost", name, domain));
}
}
/**
* Unregister host.
*/
private void unregisterHost(ObjectName objectName)
throws Exception {
String name=objectName.getKeyProperty("host");
mapper.removeHost(name);
if(log.isDebugEnabled())
log.debug(sm.getString
("mapperListener.unregisterHost", name, domain));
}
/**
* Register context.
*/
private void registerContext(ObjectName objectName)
throws Exception {
String name = objectName.getKeyProperty("name");
// If the domain is the same with ours or the engine
// name attribute is the same... - then it's ours
String targetDomain=objectName.getDomain();
if( ! domain.equals( targetDomain )) {
try {
targetDomain = (String) mBeanServer.getAttribute
(objectName, "engineName");
} catch (Exception e) {
// Ignore
}
if( ! domain.equals( targetDomain )) {
// not ours
return;
}
}
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
if(log.isDebugEnabled())
log.debug(sm.getString
("mapperListener.registerContext", contextName));
Object context =
mBeanServer.invoke(objectName, "findMappingObject", null, null);
//mBeanServer.getAttribute(objectName, "mappingObject");
javax.naming.Context resources = (javax.naming.Context)
mBeanServer.invoke(objectName, "findStaticResources", null, null);
//mBeanServer.getAttribute(objectName, "staticResources");
String[] welcomeFiles = (String[])
mBeanServer.getAttribute(objectName, "welcomeFiles");
mapper.addContext(hostName, contextName, context,
welcomeFiles, resources);
}
/**
* Unregister context.
*/
private void unregisterContext(ObjectName objectName)
throws Exception {
String name = objectName.getKeyProperty("name");
// If the domain is the same with ours or the engine
// name attribute is the same... - then it's ours
String targetDomain=objectName.getDomain();
if( ! domain.equals( targetDomain )) {
try {
targetDomain = (String) mBeanServer.getAttribute
(objectName, "engineName");
} catch (Exception e) {
// Ignore
}
if( ! domain.equals( targetDomain )) {
// not ours
return;
}
}
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
if(log.isDebugEnabled())
log.debug(sm.getString
("mapperListener.unregisterContext", contextName));
mapper.removeContext(hostName, contextName);
}
/**
* Register wrapper.
*/
private void registerWrapper(ObjectName objectName)
throws Exception {
// If the domain is the same with ours or the engine
// name attribute is the same... - then it's ours
String targetDomain=objectName.getDomain();
if( ! domain.equals( targetDomain )) {
try {
targetDomain=(String) mBeanServer.getAttribute(objectName, "engineName");
} catch (Exception e) {
// Ignore
}
if( ! domain.equals( targetDomain )) {
// not ours
return;
}
}
String wrapperName = objectName.getKeyProperty("name");
String name = objectName.getKeyProperty("WebModule");
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
if(log.isDebugEnabled())
log.debug(sm.getString
("mapperListener.registerWrapper",
wrapperName, contextName));
String[] mappings = (String[])
mBeanServer.invoke(objectName, "findMappings", null, null);
Object wrapper =
mBeanServer.invoke(objectName, "findMappingObject", null, null);
for (int i = 0; i < mappings.length; i++) {
boolean jspWildCard = (wrapperName.equals("jsp")
&& mappings[i].endsWith("/*"));
mapper.addWrapper(hostName, contextName, mappings[i], wrapper,
jspWildCard);
}
}
}
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