ActiveMQQueueBrowser

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org.activemq
Class ActiveMQQueueBrowser

java.lang.Object
  org.activemq.ActiveMQQueueBrowser

All Implemented Interfaces:: java.util.Enumeration, javax.jms.QueueBrowser

public class ActiveMQQueueBrowser
extends java.lang.Object
implements javax.jms.QueueBrowser, java.util.Enumeration

A client uses a QueueBrowser object to look at messages on a queue without removing them.

The getEnumeration method returns a java.util.Enumeration that is used to scan the queue's messages. It may be an enumeration of the entire content of a queue, or it may contain only the messages matching a message selector.

Messages may be arriving and expiring while the scan is done. The JMS API does not require the content of an enumeration to be a static snapshot of queue content. Whether these changes are visible or not depends on the JMS provider.

A QueueBrowser can be created from either a Session or a QueueSession.

Field Summary

private boolean closed


private int cnum


private ActiveMQMessageConsumer consumer


private org.activemq.message.ActiveMQQueue destination


private java.lang.String selector


private ActiveMQSession session


Constructor Summary

protected ActiveMQQueueBrowser(ActiveMQSession session, org.activemq.message.ActiveMQQueue destination, java.lang.String selector, int cnum)
          Constructor for an ActiveMQQueueBrowser - used internally

Method Summary

private void checkClosed()


void close()


private ActiveMQMessageConsumer createConsumer()


private void destroyConsumer()


java.util.Enumeration getEnumeration()
          Gets an enumeration for browsing the current queue messages in the order they would be received.

java.lang.String getMessageSelector()


javax.jms.Queue getQueue()
          Gets the queue associated with this queue browser.

boolean hasMoreElements()
          Tests whether there are elements remaining in the enumeration.

java.lang.Object nextElement()
          Obtain the next element in the enumeration.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

session

private final ActiveMQSession session

destination

private final org.activemq.message.ActiveMQQueue destination

selector

private final java.lang.String selector

cnum

private final int cnum

consumer

private ActiveMQMessageConsumer consumer

closed

private boolean closed

Constructor Detail