Package javax.jms

Interface QueueConnection

All Superinterfaces:

Connection

All Known Subinterfaces:

XAQueueConnection

public interface QueueConnection
extends Connection

A QueueConnection object is an active connection to a point-to-point JMS provider. A client uses a QueueConnection object to create one or more QueueSession objects for producing and consuming messages.

A QueueConnection can be used to create a QueueSession, from which specialized queue-related objects can be created. A more general, and recommended, approach is to use the Connection object.

The QueueConnection object should be used to support existing code that has already used it.

A QueueConnection cannot be used to create objects specific to the publish/subscribe domain. The createDurableConnectionConsumer method inherits from Connection, but must throw an IllegalStateException if used from QueueConnection.

See Also:

• Connection
• ConnectionFactory
• QueueConnectionFactory

Method Summary

Modifier and Type	Method	Description
ConnectionConsumer	createConnectionConsumer(Queue queue, String messageSelector, ServerSessionPool sessionPool, int maxMessages)	Creates a connection consumer for this connection (optional operation).
QueueSession	createQueueSession(boolean transacted, int acknowledgeMode)	Creates a QueueSession object.

Methods inherited from interface javax.jms.Connection

close, createConnectionConsumer, createDurableConnectionConsumer, createSession, getClientID, getExceptionListener, getMetaData, setClientID, setExceptionListener, start, stop

Method Details

createQueueSession

QueueSession createQueueSession(boolean transacted,
 int acknowledgeMode)
                         throws JMSException

Creates a QueueSession object.

Parameters:

transacted - indicates whether the session is transacted

acknowledgeMode - indicates whether the consumer or the client will acknowledge any messages it receives; ignored if the session is transacted. Legal values are Session.AUTO_ACKNOWLEDGE, Session.CLIENT_ACKNOWLEDGE, and Session.DUPS_OK_ACKNOWLEDGE.

Returns:

a newly created queue session

Throws:

JMSException - if the QueueConnection object fails to create a session due to some internal error or lack of support for the specific transaction and acknowledgement mode.

See Also:

• Session.AUTO_ACKNOWLEDGE
• Session.CLIENT_ACKNOWLEDGE
• Session.DUPS_OK_ACKNOWLEDGE

createConnectionConsumer

ConnectionConsumer createConnectionConsumer(Queue queue,
 String messageSelector,
 ServerSessionPool sessionPool,
 int maxMessages)
                                     throws JMSException

Creates a connection consumer for this connection (optional operation). This is an expert facility not used by regular JMS clients.

Parameters:

queue - the queue to access

messageSelector - only messages with properties matching the message selector expression are delivered. A value of null or an empty string indicates that there is no message selector for the message consumer.

sessionPool - the server session pool to associate with this connection consumer

maxMessages - the maximum number of messages that can be assigned to a server session at one time

Returns:

the connection consumer

Throws:

JMSException - if the QueueConnection object fails to create a connection consumer due to some internal error or invalid arguments for sessionPool and messageSelector.

InvalidDestinationException - if an invalid queue is specified.

InvalidSelectorException - if the message selector is invalid.

See Also:

• ConnectionConsumer