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.io.File;
021import java.net.MalformedURLException;
022import java.net.URI;
023import java.util.Map;
024
025import org.apache.activemq.broker.BrokerFactoryHandler;
026import org.apache.activemq.broker.BrokerService;
027import org.apache.activemq.util.IntrospectionSupport;
028import org.apache.activemq.util.URISupport;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031import org.apache.xbean.spring.context.ResourceXmlApplicationContext;
032import org.apache.xbean.spring.context.impl.URIEditor;
033import org.springframework.beans.BeansException;
034import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
035import org.springframework.context.ApplicationContext;
036import org.springframework.context.ApplicationContextAware;
037import org.springframework.core.io.ClassPathResource;
038import org.springframework.core.io.FileSystemResource;
039import org.springframework.core.io.Resource;
040import org.springframework.core.io.UrlResource;
041import org.springframework.util.ResourceUtils;
042
043/**
044 * 
045 */
046public class XBeanBrokerFactory implements BrokerFactoryHandler {
047    private static final transient Logger LOG = LoggerFactory.getLogger(XBeanBrokerFactory.class);
048
049    static {
050        PropertyEditorManager.registerEditor(URI.class, URIEditor.class);
051    }
052
053    private boolean validate = true;
054    public boolean isValidate() {
055        return validate;
056    }
057
058    public void setValidate(boolean validate) {
059        this.validate = validate;
060    }
061
062    public BrokerService createBroker(URI config) throws Exception {
063
064        String uri = config.getSchemeSpecificPart();
065        if (uri.lastIndexOf('?') != -1) {
066            IntrospectionSupport.setProperties(this, URISupport.parseQuery(uri));
067            uri = uri.substring(0, uri.lastIndexOf('?'));
068        }
069
070        ApplicationContext context = createApplicationContext(uri);
071
072        BrokerService broker = null;
073        try {
074            broker = (BrokerService)context.getBean("broker");
075        } catch (BeansException e) {
076        }
077
078        if (broker == null) {
079            // lets try find by type
080            String[] names = context.getBeanNamesForType(BrokerService.class);
081            for (int i = 0; i < names.length; i++) {
082                String name = names[i];
083                broker = (BrokerService)context.getBean(name);
084                if (broker != null) {
085                    break;
086                }
087            }
088        }
089        if (broker == null) {
090            throw new IllegalArgumentException("The configuration has no BrokerService instance for resource: " + config);
091        }
092        
093        if (broker instanceof ApplicationContextAware) {
094                ((ApplicationContextAware)broker).setApplicationContext(context);
095        }
096        
097        // TODO warning resources from the context may not be closed down!
098
099        return broker;
100    }
101
102    protected ApplicationContext createApplicationContext(String uri) throws MalformedURLException {
103        LOG.debug("Now attempting to figure out the type of resource: " + uri);
104
105        Resource resource;
106        File file = new File(uri);
107        if (file.exists()) {
108            resource = new FileSystemResource(uri);
109        } else if (ResourceUtils.isUrl(uri)) {
110            resource = new UrlResource(uri);
111        } else {
112            resource = new ClassPathResource(uri);
113        }
114        return new ResourceXmlApplicationContext(resource) {
115            @Override
116            protected void initBeanDefinitionReader(XmlBeanDefinitionReader reader) {
117                reader.setValidating(isValidate());
118            }
119        };
120    }
121}