| /* |
| * 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.startup; |
| |
| |
| import org.apache.tomcat.util.digester.Digester; |
| import org.apache.tomcat.util.digester.RuleSetBase; |
| import java.lang.reflect.Constructor; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.commons.logging.Log; |
| import java.lang.reflect.InvocationTargetException; |
| public class ClusterRuleSetFactory { |
| |
| public static Log log = LogFactory.getLog(ClusterRuleSetFactory.class); |
| |
| public static RuleSetBase getClusterRuleSet(String prefix) { |
| |
| //OLD CLUSTER 1 |
| //first try the same classloader as this class server/lib |
| try { |
| return loadRuleSet(prefix,"org.apache.catalina.cluster.ClusterRuleSet",ClusterRuleSetFactory.class.getClassLoader()); |
| } catch ( Exception x ) { |
| //display warning |
| if ( log.isDebugEnabled() ) log.debug("Unable to load ClusterRuleSet (org.apache.catalina.cluster.ClusterRuleSet), falling back on context classloader"); |
| } |
| //try to load it from the context class loader |
| try { |
| return loadRuleSet(prefix,"org.apache.catalina.cluster.ClusterRuleSet",Thread.currentThread().getContextClassLoader()); |
| } catch ( Exception x ) { |
| //display warning |
| if ( log.isDebugEnabled() ) log.debug("Unable to load ClusterRuleSet (org.apache.catalina.cluster.ClusterRuleSet), will try to load the HA cluster"); |
| } |
| |
| //NEW CLUSTER 2 |
| //first try the same classloader as this class server/lib |
| try { |
| return loadRuleSet(prefix,"org.apache.catalina.ha.ClusterRuleSet",ClusterRuleSetFactory.class.getClassLoader()); |
| } catch ( Exception x ) { |
| //display warning |
| if ( log.isDebugEnabled() ) log.debug("Unable to load HA ClusterRuleSet (org.apache.catalina.ha.ClusterRuleSet), falling back on context classloader"); |
| } |
| //try to load it from the context class loader |
| try { |
| return loadRuleSet(prefix,"org.apache.catalina.ha.ClusterRuleSet",Thread.currentThread().getContextClassLoader()); |
| } catch ( Exception x ) { |
| //display warning |
| if ( log.isDebugEnabled() ) log.debug("Unable to load HA ClusterRuleSet (org.apache.catalina.ha.ClusterRuleSet), falling back on DefaultClusterRuleSet"); |
| } |
| |
| log.info("Unable to find a cluster rule set in the classpath. Will load the default rule set."); |
| return new DefaultClusterRuleSet(prefix); |
| } |
| |
| |
| protected static RuleSetBase loadRuleSet(String prefix, String className, ClassLoader cl) |
| throws ClassNotFoundException, InstantiationException, |
| NoSuchMethodException,IllegalAccessException, |
| InvocationTargetException { |
| Class clazz = Class.forName(className,true,cl); |
| Constructor cons = clazz.getConstructor(new Class[] {String.class}); |
| return (RuleSetBase)cons.newInstance(new String[] {prefix}); |
| } |
| |
| /** |
| * <p><strong>RuleSet</strong> for processing the contents of a |
| * Cluster definition element. </p> |
| * |
| * @author Filip Hanik |
| * @author Peter Rossbach |
| * @version $Revision$ $Date$ |
| */ |
| |
| public static class DefaultClusterRuleSet extends RuleSetBase { |
| |
| |
| // ----------------------------------------------------- Instance Variables |
| |
| |
| /** |
| * The matching pattern prefix to use for recognizing our elements. |
| */ |
| protected String prefix = null; |
| |
| |
| // ------------------------------------------------------------ Constructor |
| |
| |
| /** |
| * Construct an instance of this <code>RuleSet</code> with the default |
| * matching pattern prefix. |
| */ |
| public DefaultClusterRuleSet() { |
| |
| this(""); |
| |
| } |
| |
| |
| /** |
| * Construct an instance of this <code>RuleSet</code> with the specified |
| * matching pattern prefix. |
| * |
| * @param prefix Prefix for matching pattern rules (including the |
| * trailing slash character) |
| */ |
| public DefaultClusterRuleSet(String prefix) { |
| super(); |
| this.namespaceURI = null; |
| this.prefix = prefix; |
| } |
| |
| |
| // --------------------------------------------------------- Public Methods |
| |
| |
| /** |
| * <p>Add the set of Rule instances defined in this RuleSet to the |
| * specified <code>Digester</code> instance, associating them with |
| * our namespace URI (if any). This method should only be called |
| * by a Digester instance.</p> |
| * |
| * @param digester Digester instance to which the new Rule instances |
| * should be added. |
| */ |
| public void addRuleInstances(Digester digester) { |
| //Cluster configuration start |
| digester.addObjectCreate(prefix + "Membership", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "Membership"); |
| digester.addSetNext(prefix + "Membership", |
| "setMembershipService", |
| "org.apache.catalina.cluster.MembershipService"); |
| |
| digester.addObjectCreate(prefix + "Sender", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "Sender"); |
| digester.addSetNext(prefix + "Sender", |
| "setClusterSender", |
| "org.apache.catalina.cluster.ClusterSender"); |
| |
| digester.addObjectCreate(prefix + "Receiver", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "Receiver"); |
| digester.addSetNext(prefix + "Receiver", |
| "setClusterReceiver", |
| "org.apache.catalina.cluster.ClusterReceiver"); |
| |
| digester.addObjectCreate(prefix + "Valve", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "Valve"); |
| digester.addSetNext(prefix + "Valve", |
| "addValve", |
| "org.apache.catalina.Valve"); |
| |
| digester.addObjectCreate(prefix + "Deployer", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "Deployer"); |
| digester.addSetNext(prefix + "Deployer", |
| "setClusterDeployer", |
| "org.apache.catalina.cluster.ClusterDeployer"); |
| |
| digester.addObjectCreate(prefix + "Listener", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "Listener"); |
| digester.addSetNext(prefix + "Listener", |
| "addLifecycleListener", |
| "org.apache.catalina.LifecycleListener"); |
| |
| digester.addObjectCreate(prefix + "ClusterListener", |
| null, // MUST be specified in the element |
| "className"); |
| digester.addSetProperties(prefix + "ClusterListener"); |
| digester.addSetNext(prefix + "ClusterListener", |
| "addClusterListener", |
| "org.apache.catalina.cluster.MessageListener"); |
| //Cluster configuration end |
| } |
| |
| |
| } |
| } |
