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     */
017    package org.apache.camel.spring.remoting;
018    
019    import org.apache.camel.CamelContext;
020    import org.apache.camel.CamelContextAware;
021    import org.apache.camel.Consumer;
022    import org.apache.camel.Endpoint;
023    import org.apache.camel.component.bean.BeanProcessor;
024    import org.apache.camel.spring.util.CamelContextResolverHelper;
025    import org.apache.camel.util.CamelContextHelper;
026    import org.apache.camel.util.ObjectHelper;
027    import org.springframework.beans.BeansException;
028    import org.springframework.beans.factory.DisposableBean;
029    import org.springframework.beans.factory.FactoryBean;
030    import org.springframework.beans.factory.InitializingBean;
031    import org.springframework.context.ApplicationContext;
032    import org.springframework.context.ApplicationContextAware;
033    import org.springframework.remoting.support.RemoteExporter;
034    
035    import static org.apache.camel.util.ObjectHelper.notNull;
036    
037    /**
038     * A {@link FactoryBean} to create a proxy to a service exposing a given {@link #getServiceInterface()}
039     */
040    public class CamelServiceExporter extends RemoteExporter implements InitializingBean, DisposableBean, ApplicationContextAware, CamelContextAware {
041        private String uri;
042        private CamelContext camelContext;
043        private String camelContextId;
044        private Consumer consumer;
045        private String serviceRef;
046        private ApplicationContext applicationContext;
047    
048        public String getUri() {
049            return uri;
050        }
051    
052        public void setUri(String uri) {
053            this.uri = uri;
054        }
055    
056        public CamelContext getCamelContext() {
057            return camelContext;
058        }
059    
060        public void setCamelContext(CamelContext camelContext) {
061            this.camelContext = camelContext;
062        }
063        
064        public void setCamelContextId(String camelContextId) {
065            this.camelContextId = camelContextId;
066        }
067    
068        public String getServiceRef() {
069            return serviceRef;
070        }
071    
072        public void setServiceRef(String serviceRef) {
073            this.serviceRef = serviceRef;
074        }
075    
076        public ApplicationContext getApplicationContext() {
077            return applicationContext;
078        }
079    
080        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
081            this.applicationContext = applicationContext;
082        }
083    
084        public void afterPropertiesSet() throws Exception {
085            // lets bind the URI to a pojo
086            notNull(uri, "uri");
087            // Always resolve the camel context by using the camelContextID
088            if (ObjectHelper.isNotEmpty(camelContextId)) {
089                camelContext = CamelContextResolverHelper.getCamelContextWithId(applicationContext, camelContextId);
090            }
091            notNull(camelContext, "camelContext");
092            if (serviceRef != null && getService() == null && applicationContext != null) {
093                setService(applicationContext.getBean(serviceRef));
094            }
095    
096            Endpoint endpoint = CamelContextHelper.getMandatoryEndpoint(camelContext, uri);
097            notNull(getService(), "service");
098            Object proxy = getProxyForService();
099    
100            consumer = endpoint.createConsumer(new BeanProcessor(proxy, camelContext));
101            consumer.start();
102        }
103    
104        public void destroy() throws Exception {
105            if (consumer != null) {
106                consumer.stop();
107            }
108        }
109    
110    }