| /* |
| * 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.activemq.web; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import javax.jms.JMSException; |
| import javax.jms.Message; |
| import javax.jms.Queue; |
| import javax.jms.QueueBrowser; |
| import javax.jms.Session; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.activemq.util.FactoryFinder; |
| import org.apache.activemq.util.IntrospectionSupport; |
| import org.apache.activemq.web.view.MessageRenderer; |
| import org.apache.activemq.web.view.XmlMessageRenderer; |
| |
| /** |
| * Renders the contents of a queue using some kind of view. The URI is assumed |
| * to be the queue. The following parameters can be used |
| * <p/> |
| * <ul> |
| * <li>view - specifies the type of the view such as simple, xml, rss</li> |
| * <li>selector - specifies the SQL 92 selector to apply to the queue</li> |
| * </ul> |
| * |
| * |
| */ |
| public class QueueBrowseServlet extends HttpServlet { |
| private static FactoryFinder factoryFinder = new FactoryFinder("META-INF/services/org/apache/activemq/web/view/"); |
| |
| // Implementation methods |
| // ------------------------------------------------------------------------- |
| protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
| try { |
| WebClient client = WebClient.getWebClient(request); |
| Session session = client.getSession(); |
| Queue queue = getQueue(request, session); |
| if (queue == null) { |
| throw new ServletException("No queue URI specified"); |
| } |
| |
| String msgId = request.getParameter("msgId"); |
| if (msgId == null) { |
| MessageRenderer renderer = getMessageRenderer(request); |
| configureRenderer(request, renderer); |
| |
| String selector = getSelector(request); |
| QueueBrowser browser = session.createBrowser(queue, selector); |
| renderer.renderMessages(request, response, browser); |
| } |
| else { |
| XmlMessageRenderer renderer = new XmlMessageRenderer(); |
| QueueBrowser browser = session.createBrowser(queue, "JMSMessageID='" + msgId + "'"); |
| if (!browser.getEnumeration().hasMoreElements()) { |
| response.sendError(HttpServletResponse.SC_NOT_FOUND); |
| return; |
| } |
| Message message = (Message) browser.getEnumeration().nextElement(); |
| |
| PrintWriter writer = response.getWriter(); |
| renderer.renderMessage(writer, request, response, browser, message); |
| writer.flush(); |
| } |
| } |
| catch (JMSException e) { |
| throw new ServletException(e); |
| } |
| } |
| |
| protected MessageRenderer getMessageRenderer(HttpServletRequest request) throws IOException, ServletException { |
| String style = request.getParameter("view"); |
| if (style == null) { |
| style = "simple"; |
| } |
| try { |
| return (MessageRenderer) factoryFinder.newInstance(style); |
| } |
| catch (IllegalAccessException e) { |
| throw new NoSuchViewStyleException(style, e); |
| } |
| catch (InstantiationException e) { |
| throw new NoSuchViewStyleException(style, e); |
| } |
| catch (ClassNotFoundException e) { |
| throw new NoSuchViewStyleException(style, e); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected void configureRenderer(HttpServletRequest request, MessageRenderer renderer) { |
| Map<String, String> properties = new HashMap<String, String>(); |
| for (Enumeration<String> iter = request.getParameterNames(); iter.hasMoreElements();) { |
| String name = (String) iter.nextElement(); |
| properties.put(name, request.getParameter(name)); |
| } |
| IntrospectionSupport.setProperties(renderer, properties); |
| } |
| |
| protected String getSelector(HttpServletRequest request) { |
| return request.getParameter("selector"); |
| } |
| |
| protected Queue getQueue(HttpServletRequest request, Session session) throws JMSException { |
| String uri = request.getPathInfo(); |
| if (uri == null) { |
| return null; |
| } |
| |
| // replace URI separator with JMS destination separator |
| if (uri.startsWith("/")) { |
| uri = uri.substring(1); |
| if (uri.length() == 0) { |
| return null; |
| } |
| } |
| uri = uri.replace('/', '.'); |
| |
| return session.createQueue(uri); |
| } |
| } |