/*
* Copyright 2003,2004 Colin Crist
*
* Licensed 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 hermes.impl;
import hermes.util.MessageUtils;
import java.util.Enumeration;
import javax.jms.BytesMessage;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.ObjectMessage;
import javax.jms.Queue;
import javax.jms.QueueBrowser;
import javax.jms.TextMessage;
import org.apache.log4j.Logger;
/**
* QueueBrowser that facades another QueueBrowser and does an additional level
* of filtering based on a string search. The seach is performed on either
* MapMessages or TextMessages and on the header properties of all messages.
*
* @author colincrist@hermesjms.com last changed by: $Author: colincrist $
* @version $Id: StringSearchQueueBrowser.java,v 1.3 2004/11/30 20:21:36
* colincrist Exp $
*/
public class StringSearchQueueBrowser implements QueueBrowser {
private static final Logger log = Logger.getLogger(StringSearchQueueBrowser.class);
private boolean searchJMSHeader;
private boolean searchUserHeader;
private QueueBrowser browser;
private String string;
class StringSearchEnumeration implements Enumeration {
private Enumeration iter;
StringSearchEnumeration(Enumeration iter) {
this.iter = iter;
}
public boolean hasMoreElements() {
return iter.hasMoreElements();
}
public Object nextElement() {
while (iter.hasMoreElements()) {
Message m = (Message) iter.nextElement();
if (m != null) {
if (matches(m)) {
return m;
}
} else {
return null;
}
}
return null;
}
}
/**
* Create a new StringSearchQueueBrowser to filter messages from the
* underlying QueueBrowser.
*
* @param browser
* the underlying queue browser
* @param regex
* the regular expression
* @param searchJMSHeader
* whether to search the JMS header properties
* @param searchUserHeader
* whether to search the user properties
*/
public StringSearchQueueBrowser(QueueBrowser browser, String string, boolean searchJMSHeader, boolean searchUserHeader) {
this.browser = browser;
this.searchJMSHeader = searchJMSHeader;
this.searchUserHeader = searchUserHeader;
this.string = string;
}
/*
* (non-Javadoc)
*
* @see javax.jms.QueueBrowser#getQueue()
*/
public Queue getQueue() throws JMSException {
return browser.getQueue();
}
/*
* (non-Javadoc)
*
* @see javax.jms.QueueBrowser#getMessageSelector()
*/
public String getMessageSelector() throws JMSException {
return browser.getMessageSelector();
}
/*
* (non-Javadoc)
*
* @see javax.jms.QueueBrowser#getEnumeration()
*/
public Enumeration getEnumeration() throws JMSException {
return new StringSearchEnumeration(browser.getEnumeration());
}
/*
* (non-Javadoc)
*
* @see javax.jms.QueueBrowser#close()
*/
public void close() throws JMSException {
browser.close();
}
public boolean matches(Message message) {
try {
if (searchJMSHeader) {
}
if (searchUserHeader) {
for (Enumeration headerNames = message.getPropertyNames(); headerNames.hasMoreElements();) {
try {
String key = (String) headerNames.nextElement();
Object value = message.getObjectProperty(key);
if (key != null) {
if (key.indexOf(string) != -1) {
return true;
}
}
if (value != null) {
if (value.toString().indexOf(string) != -1) {
return true;
}
}
} catch (JMSException ex) {
log.error(ex.getMessage(), ex);
}
}
}
if (message instanceof TextMessage) {
try {
String text = ((TextMessage) message).getText();
return text != null && text.indexOf(string) != -1;
} catch (JMSException ex) {
log.error(ex.getMessage(), ex);
}
} else if (message instanceof MapMessage) {
try {
MapMessage map = (MapMessage) message;
for (Enumeration mapNames = map.getMapNames(); mapNames.hasMoreElements();) {
String key = (String) mapNames.nextElement();
Object value = map.getObject(key);
if (key.indexOf(string) != -1) {
return true;
}
if (value != null) {
if (value.toString().indexOf(string) != -1) {
return true;
}
}
}
} catch (JMSException ex) {
log.error(ex.getMessage(), ex);
}
} else if (message instanceof ObjectMessage) {
try {
final ObjectMessage om = (ObjectMessage) message;
final String toString = om.getObject().toString();
if (toString.indexOf(string) != -1) {
return true;
}
} catch (Throwable t) {
log.error(t.getMessage(), t);
}
} else if (message instanceof BytesMessage) {
final BytesMessage bm = (BytesMessage) message;
final String toString = new String(MessageUtils.asBytes(bm));
return toString.indexOf(string) != -1;
}
return false;
} catch (JMSException e) {
log.error(e.getMessage(), e);
}
return false;
}
}