| /** |
| * 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.view; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.Enumeration; |
| |
| import javax.jms.JMSException; |
| import javax.jms.Message; |
| import javax.jms.QueueBrowser; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| /** |
| * A simple rendering of the contents of a queue appear as a list of message |
| * elements which just contain an ID attribute. |
| * |
| * |
| */ |
| public class SimpleMessageRenderer implements MessageRenderer { |
| |
| private String contentType = "text/xml"; |
| private int maxMessages; |
| |
| public void renderMessages(HttpServletRequest request, HttpServletResponse response, QueueBrowser browser) throws IOException, JMSException, ServletException { |
| // lets use XML by default |
| response.setContentType(getContentType()); |
| PrintWriter writer = response.getWriter(); |
| printHeader(writer, browser, request); |
| |
| Enumeration iter = browser.getEnumeration(); |
| for (int counter = 0; iter.hasMoreElements() && (maxMessages <= 0 || counter < maxMessages); counter++) { |
| Message message = (Message)iter.nextElement(); |
| renderMessage(writer, request, response, browser, message); |
| } |
| |
| printFooter(writer, browser, request); |
| } |
| |
| public void renderMessage(PrintWriter writer, HttpServletRequest request, HttpServletResponse response, QueueBrowser browser, Message message) throws JMSException, ServletException { |
| // lets just write the message IDs for now |
| writer.print("<message id='"); |
| writer.print(message.getJMSMessageID()); |
| writer.println("'/>"); |
| } |
| |
| // Properties |
| // ------------------------------------------------------------------------- |
| public int getMaxMessages() { |
| return maxMessages; |
| } |
| |
| public void setMaxMessages(int maxMessages) { |
| this.maxMessages = maxMessages; |
| } |
| |
| public String getContentType() { |
| return contentType; |
| } |
| |
| public void setContentType(String contentType) { |
| this.contentType = contentType; |
| } |
| |
| // Implementation methods |
| // ------------------------------------------------------------------------- |
| |
| protected void printHeader(PrintWriter writer, QueueBrowser browser, HttpServletRequest request) throws IOException, JMSException, ServletException { |
| writer.println(""); |
| writer.print("<messages queue='"); |
| writer.print(browser.getQueue()); |
| writer.print("'"); |
| String selector = browser.getMessageSelector(); |
| if (selector != null) { |
| writer.print(" selector='"); |
| writer.print(selector); |
| writer.print("'"); |
| } |
| writer.println(">"); |
| } |
| |
| protected void printFooter(PrintWriter writer, QueueBrowser browser, HttpServletRequest request) throws IOException, JMSException, ServletException { |
| writer.println("</messages>"); |
| } |
| |
| } |