001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.xbean;
018
019import java.beans.PropertyEditorManager;
020import java.net.URI;
021
022import org.apache.activemq.broker.BrokerService;
023import org.apache.xbean.spring.context.ResourceXmlApplicationContext;
024import org.apache.xbean.spring.context.impl.URIEditor;
025import org.springframework.beans.BeansException;
026import org.springframework.beans.factory.DisposableBean;
027import org.springframework.beans.factory.FactoryBean;
028import org.springframework.beans.factory.InitializingBean;
029import org.springframework.context.ApplicationContext;
030import org.springframework.context.ApplicationContextAware;
031import org.springframework.core.io.Resource;
032
033/**
034 * A Spring {@link FactoryBean} which creates an embedded broker inside a Spring
035 * XML using an external <a href="http://gbean.org/Custom+XML">XBean Spring XML
036 * configuration file</a> which provides a much neater and more concise XML
037 * format.
038 * 
039 * 
040 */
041public class BrokerFactoryBean implements FactoryBean, InitializingBean, DisposableBean, ApplicationContextAware {
042
043    static {
044        PropertyEditorManager.registerEditor(URI.class, URIEditor.class);
045    }
046
047    private Resource config;
048    private XBeanBrokerService broker;
049    private boolean start;
050    private ResourceXmlApplicationContext context;
051    private ApplicationContext parentContext;
052    
053    private boolean systemExitOnShutdown;
054    private int systemExitOnShutdownExitCode;
055
056    public BrokerFactoryBean() {
057    }
058
059    public BrokerFactoryBean(Resource config) {
060        this.config = config;
061    }
062
063    public Object getObject() throws Exception {
064        return broker;
065    }
066
067    public Class getObjectType() {
068        return BrokerService.class;
069    }
070
071    public boolean isSingleton() {
072        return true;
073    }
074
075    public void setApplicationContext(ApplicationContext parentContext) throws BeansException {
076        this.parentContext = parentContext;
077    }
078
079    public void afterPropertiesSet() throws Exception {
080        if (config == null) {
081            throw new IllegalArgumentException("config property must be set");
082        }
083        context = new ResourceXmlApplicationContext(config, parentContext);
084
085        try {
086            broker = (XBeanBrokerService)context.getBean("broker");
087        } catch (BeansException e) {
088            // ignore...
089            // log.trace("No bean named broker available: " + e, e);
090        }
091        if (broker == null) {
092            // lets try find by type
093            String[] names = context.getBeanNamesForType(BrokerService.class);
094            for (int i = 0; i < names.length; i++) {
095                String name = names[i];
096                broker = (XBeanBrokerService)context.getBean(name);
097                if (broker != null) {
098                    break;
099                }
100            }
101        }
102        if (broker == null) {
103            throw new IllegalArgumentException("The configuration has no BrokerService instance for resource: " + config);
104        }
105        
106        if( systemExitOnShutdown ) {
107            broker.addShutdownHook(new Runnable(){
108                public void run() {
109                    System.exit(systemExitOnShutdownExitCode);
110                }
111            });
112        }
113        if (start) {
114            broker.start();
115        }
116    }
117
118    public void destroy() throws Exception {
119        if (context != null) {
120            context.close();
121        }
122        if (broker != null) {
123            broker.stop();
124        }
125    }
126
127    public Resource getConfig() {
128        return config;
129    }
130
131    public void setConfig(Resource config) {
132        this.config = config;
133    }
134
135    public BrokerService getBroker() {
136        return broker;
137    }
138
139    public boolean isStart() {
140        return start;
141    }
142
143    public void setStart(boolean start) {
144        this.start = start;
145    }
146
147    public boolean isSystemExitOnStop() {
148        return systemExitOnShutdown;
149    }
150
151    public void setSystemExitOnStop(boolean systemExitOnStop) {
152        this.systemExitOnShutdown = systemExitOnStop;
153    }
154
155    public boolean isSystemExitOnShutdown() {
156        return systemExitOnShutdown;
157    }
158
159    public void setSystemExitOnShutdown(boolean systemExitOnShutdown) {
160        this.systemExitOnShutdown = systemExitOnShutdown;
161    }
162
163    public int getSystemExitOnShutdownExitCode() {
164        return systemExitOnShutdownExitCode;
165    }
166
167    public void setSystemExitOnShutdownExitCode(int systemExitOnShutdownExitCode) {
168        this.systemExitOnShutdownExitCode = systemExitOnShutdownExitCode;
169    }
170
171}