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.web;
018
019import java.util.Enumeration;
020import java.util.HashMap;
021import java.util.Map;
022import javax.jms.BytesMessage;
023import javax.jms.JMSException;
024import javax.jms.MapMessage;
025import javax.jms.Message;
026import javax.jms.ObjectMessage;
027import javax.jms.QueueBrowser;
028import javax.jms.StreamMessage;
029import javax.jms.TextMessage;
030
031/**
032 * Allow the user to browse a message on a queue by its ID
033 * 
034 * 
035 */
036public class MessageQuery extends QueueBrowseQuery {
037
038    private String id;
039    private Message message;
040
041    public MessageQuery(BrokerFacade brokerFacade, SessionPool sessionPool) throws JMSException {
042        super(brokerFacade, sessionPool);
043    }
044
045    public String getId() {
046        return id;
047    }
048
049    public void setId(String id) {
050        this.id = id;
051    }
052
053    public void setMessage(Message message) {
054        this.message = message;
055    }
056
057    public Message getMessage() throws JMSException {
058        if (message == null) {
059            if (id != null) {
060                QueueBrowser tempBrowser=getBrowser();
061                Enumeration iter = tempBrowser.getEnumeration();
062                while (iter.hasMoreElements()) {
063                    Message item = (Message) iter.nextElement();
064                    if (id.equals(item.getJMSMessageID())) {
065                        message = item;
066                        break;
067                    }
068                }
069                tempBrowser.close();
070            }
071
072        }
073        return message;
074    }
075
076    public Object getBody() throws JMSException {
077        Message message = getMessage();
078        if (message instanceof TextMessage) {
079            return ((TextMessage) message).getText();
080        }
081        if (message instanceof ObjectMessage) {
082            try {
083                return ((ObjectMessage) message).getObject();
084            } catch (Exception e) {
085                //message could not be parsed, make the reason available
086                return new String("Cannot display ObjectMessage body. Reason: " + e.getMessage());
087            }
088        }
089        if (message instanceof MapMessage) {
090            return createMapBody((MapMessage) message);
091        }
092        if (message instanceof BytesMessage) {
093            BytesMessage msg = (BytesMessage) message;
094            int len = (int) msg.getBodyLength();
095            if (len > -1) {
096                byte[] data = new byte[len];
097                msg.readBytes(data);
098                return new String(data);
099            } else {
100                return "";
101            }
102        }
103        if (message instanceof StreamMessage) {
104            return "StreamMessage is not viewable";
105        }
106
107        // unknown message type
108        if (message != null) {
109            return "Unknown message type [" + message.getClass().getName() + "] " + message;
110        }
111
112        return null;
113    }
114    
115    public boolean isDLQ() throws Exception {
116        return getQueueView().isDLQ();
117    }
118
119    public Map<String, Object> getPropertiesMap() throws JMSException {
120        Map<String, Object> answer = new HashMap<String, Object>();
121        Message aMessage = getMessage();
122        Enumeration iter = aMessage.getPropertyNames();
123        while (iter.hasMoreElements()) {
124            String name = (String) iter.nextElement();
125            Object value = aMessage.getObjectProperty(name);
126            if (value != null) {
127                answer.put(name, value);
128            }
129        }
130        return answer;
131    }
132
133    protected Map<String, Object> createMapBody(MapMessage mapMessage) throws JMSException {
134        Map<String, Object> answer = new HashMap<String, Object>();
135        Enumeration iter = mapMessage.getMapNames();
136        while (iter.hasMoreElements()) {
137            String name = (String) iter.nextElement();
138            Object value = mapMessage.getObject(name);
139            if (value != null) {
140                answer.put(name, value);
141            }
142        }
143        return answer;
144    }
145}