Package org.ow2.joram.jakarta.jms

Class QueueBrowser

java.lang.Object

org.ow2.joram.jakarta.jms.QueueBrowser

All Implemented Interfaces:

jakarta.jms.QueueBrowser, AutoCloseable

public class QueueBrowser
extends Object
implements jakarta.jms.QueueBrowser

Implements the jakarta.jms.QueueBrowser interface.

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.

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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	QueueBrowser.QueueEnumeration	The QueueEnumeration class is used to enumerate the browses sent by queues.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	closed	true if the browser is closed.
private static boolean	DEBUG
private static Logger	logger
private Queue	queue	The queue the browser browses.
private String	selector	The selector for filtering messages.
private Session	sess	The session the browser belongs to.

Constructor Summary

Constructors

Constructor	Description
QueueBrowser(Session sess, Queue queue, String selector)	Constructs a browser.

Method Summary

Modifier and Type	Method	Description
void	close()	API method.
Enumeration	getEnumeration()	API method.
String	getMessageSelector()	API method.
jakarta.jms.Queue	getQueue()	API method.
String	toString()	Returns a string view of this browser.

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static Logger logger

DEBUG

private static final boolean DEBUG

sess

private Session sess

The session the browser belongs to.

queue

private Queue queue

The queue the browser browses.

selector

private String selector

The selector for filtering messages.

closed

private boolean closed

true if the browser is closed.

Constructor Detail

QueueBrowser

QueueBrowser(Session sess,
             Queue queue,
             String selector)
      throws jakarta.jms.JMSException

Constructs a browser.

Parameters:

sess - The session the browser belongs to.

queue - The queue the browser browses.

selector - The selector for filtering messages.

Throws:

jakarta.jms.InvalidDestinationException - if an invalid destination is specified.

jakarta.jms.InvalidSelectorException - If the selector syntax is invalid.

jakarta.jms.IllegalStateException - If the connection is broken.

jakarta.jms.JMSException - If the creation fails for any other reason.

Method Detail

toString

public String toString()

Returns a string view of this browser.

Overrides:

toString in class Object

getQueue

public jakarta.jms.Queue getQueue()
                           throws jakarta.jms.JMSException

API method.

Specified by:

getQueue in interface jakarta.jms.QueueBrowser

Throws:

jakarta.jms.IllegalStateException - If the browser is closed.

jakarta.jms.JMSException

getMessageSelector

public String getMessageSelector()
                          throws jakarta.jms.JMSException

API method. Gets this queue browser's message selector expression.

Specified by:

getMessageSelector in interface jakarta.jms.QueueBrowser

Returns:

this queue browser's message selector, or null if no message selector exists for the message consumer.

Throws:

jakarta.jms.IllegalStateException - If the browser is closed.

jakarta.jms.JMSException

getEnumeration

public Enumeration getEnumeration()
                           throws jakarta.jms.JMSException

API method. Gets an enumeration for browsing the current queue messages in the order they would be received.

Specified by:

getEnumeration in interface jakarta.jms.QueueBrowser

Returns:

an enumeration for browsing the messages.

Throws:

jakarta.jms.IllegalStateException - If the browser is closed, or if the connection is broken.

jakarta.jms.JMSSecurityException - If the client is not a READER on the queue.

jakarta.jms.JMSException - If the request fails for any other reason.

close

public void close()
           throws jakarta.jms.JMSException

API method. Closes the QueueBrowser.

In order to free significant resources allocated on behalf of a QueueBrowser, clients should close them when they are not needed.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface jakarta.jms.QueueBrowser

Throws:

jakarta.jms.JMSException - Actually never thrown.