/*
* 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.mbeans;
import java.util.Iterator;
import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.OperationNotSupportedException;
import org.apache.catalina.Group;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Role;
import org.apache.catalina.User;
import org.apache.catalina.UserDatabase;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.modeler.Registry;
/**
* Implementation of <code>LifecycleListener</code> that instantiates the
* set of MBeans associated with global JNDI resources that are subject to
* management.
*
* @author Craig R. McClanahan
* @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
* @since 4.1
*/
public class GlobalResourcesLifecycleListener
implements LifecycleListener {
private static Log log = LogFactory.getLog(GlobalResourcesLifecycleListener.class);
// ----------------------------------------------------- Instance Variables
/**
* The owning Catalina component that we are attached to.
*/
protected Lifecycle component = null;
/**
* The configuration information registry for our managed beans.
*/
protected static Registry registry = MBeanUtils.createRegistry();
// ---------------------------------------------- LifecycleListener Methods
/**
* Primary entry point for startup and shutdown events.
*
* @param event The event that has occurred
*/
public void lifecycleEvent(LifecycleEvent event) {
if (Lifecycle.START_EVENT.equals(event.getType())) {
component = event.getLifecycle();
createMBeans();
} else if (Lifecycle.STOP_EVENT.equals(event.getType())) {
destroyMBeans();
component = null;
}
}
// ------------------------------------------------------ Protected Methods
/**
* Create the MBeans for the interesting global JNDI resources.
*/
protected void createMBeans() {
// Look up our global naming context
Context context = null;
try {
context = (Context) (new InitialContext()).lookup("java:/");
} catch (NamingException e) {
log.error("No global naming context defined for server");
return;
}
// Recurse through the defined global JNDI resources context
try {
createMBeans("", context);
} catch (NamingException e) {
log.error("Exception processing Global JNDI Resources", e);
}
}
/**
* Create the MBeans for the interesting global JNDI resources in
* the specified naming context.
*
* @param prefix Prefix for complete object name paths
* @param context Context to be scanned
*
* @exception NamingException if a JNDI exception occurs
*/
protected void createMBeans(String prefix, Context context)
throws NamingException {
if (log.isDebugEnabled()) {
log.debug("Creating MBeans for Global JNDI Resources in Context '" +
prefix + "'");
}
try {
NamingEnumeration bindings = context.listBindings("");
while (bindings.hasMore()) {
Binding binding = (Binding) bindings.next();
String name = prefix + binding.getName();
Object value = context.lookup(binding.getName());
if (log.isDebugEnabled()) {
log.debug("Checking resource " + name);
}
if (value instanceof Context) {
createMBeans(name + "/", (Context) value);
} else if (value instanceof UserDatabase) {
try {
createMBeans(name, (UserDatabase) value);
} catch (Exception e) {
log.error("Exception creating UserDatabase MBeans for " + name,
e);
}
}
}
} catch( RuntimeException ex) {
log.error("RuntimeException " + ex);
} catch( OperationNotSupportedException ex) {
log.error("Operation not supported " + ex);
}
}
/**
* Create the MBeans for the specified UserDatabase and its contents.
*
* @param name Complete resource name of this UserDatabase
* @param database The UserDatabase to be processed
*
* @exception Exception if an exception occurs while creating MBeans
*/
protected void createMBeans(String name, UserDatabase database)
throws Exception {
// Create the MBean for the UserDatabase itself
if (log.isDebugEnabled()) {
log.debug("Creating UserDatabase MBeans for resource " + name);
log.debug("Database=" + database);
}
if (MBeanUtils.createMBean(database) == null) {
throw new IllegalArgumentException
("Cannot create UserDatabase MBean for resource " + name);
}
// Create the MBeans for each defined Role
Iterator roles = database.getRoles();
while (roles.hasNext()) {
Role role = (Role) roles.next();
if (log.isDebugEnabled()) {
log.debug(" Creating Role MBean for role " + role);
}
if (MBeanUtils.createMBean(role) == null) {
throw new IllegalArgumentException
("Cannot create Role MBean for role " + role);
}
}
// Create the MBeans for each defined Group
Iterator groups = database.getGroups();
while (groups.hasNext()) {
Group group = (Group) groups.next();
if (log.isDebugEnabled()) {
log.debug(" Creating Group MBean for group " + group);
}
if (MBeanUtils.createMBean(group) == null) {
throw new IllegalArgumentException
("Cannot create Group MBean for group " + group);
}
}
// Create the MBeans for each defined User
Iterator users = database.getUsers();
while (users.hasNext()) {
User user = (User) users.next();
if (log.isDebugEnabled()) {
log.debug(" Creating User MBean for user " + user);
}
if (MBeanUtils.createMBean(user) == null) {
throw new IllegalArgumentException
("Cannot create User MBean for user " + user);
}
}
}
/**
* Destroy the MBeans for the interesting global JNDI resources.
*/
protected void destroyMBeans() {
if (log.isDebugEnabled()) {
log.debug("Destroying MBeans for Global JNDI Resources");
}
}
}
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