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.servicemix.http;
018
019 import java.io.IOException;
020
021 import javax.servlet.ServletConfig;
022 import javax.servlet.ServletException;
023 import javax.servlet.http.HttpServletRequest;
024 import javax.servlet.http.HttpServletResponse;
025
026 import org.apache.servicemix.jbi.container.JBIContainer;
027 import org.apache.servicemix.jbi.framework.ComponentMBeanImpl;
028 import org.springframework.context.ApplicationContext;
029 import org.springframework.web.context.support.WebApplicationContextUtils;
030
031 /**
032 * This servlet is meant to be used when embedding ServiceMix in a web application so that so servicemix-http component
033 * will reuse the web container.
034 *
035 * @author gnodet
036 */
037 public class HttpManagedServlet extends javax.servlet.http.HttpServlet {
038
039 public static final String CONTAINER_PROPERTY = "container";
040 public static final String CONTAINER_DEFAULT = "jbi";
041
042 public static final String COMPONENT_PROPERTY = "component";
043 public static final String COMPONENT_DEFAULT = "servicemix-http";
044
045 public static final String MAPPING_PROPERTY = "mapping";
046
047 private HttpProcessor processor;
048
049 public void init(ServletConfig config) throws ServletException {
050 super.init(config);
051
052 // Retrieve spring application context
053 ApplicationContext applicationContext = WebApplicationContextUtils
054 .getRequiredWebApplicationContext(getServletContext());
055
056 // Retrieve
057 String containerName = config.getInitParameter(CONTAINER_PROPERTY);
058 if (containerName == null) {
059 containerName = CONTAINER_DEFAULT;
060 }
061 JBIContainer container = (JBIContainer) applicationContext.getBean(containerName);
062 if (container == null) {
063 throw new IllegalStateException("Unable to find jbi container " + containerName);
064 }
065 String componentName = config.getInitParameter(COMPONENT_PROPERTY);
066 if (componentName == null) {
067 componentName = COMPONENT_DEFAULT;
068 }
069 ComponentMBeanImpl componentMBean = container.getComponent(componentName);
070 if (componentMBean == null) {
071 throw new IllegalStateException("Unable to find component " + componentName);
072 }
073 HttpComponent component = (HttpComponent) componentMBean.getComponent();
074 String mapping = config.getInitParameter(MAPPING_PROPERTY);
075 if (mapping != null) {
076 component.getConfiguration().setMapping(mapping);
077 }
078 processor = component.getMainProcessor();
079 }
080
081 protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException,
082 IOException {
083 try {
084 processor.process(request, response);
085 } catch (IOException e) {
086 throw e;
087 } catch (ServletException e) {
088 throw e;
089 } catch (RuntimeException e) {
090 throw e;
091 } catch (Exception e) {
092 throw new ServletException("Failed to process request: " + e, e);
093 }
094 }
095 }