Package javax.jms

Interface QueueConnection

All Superinterfaces:

AutoCloseable, 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.

Since:

JMS 1.0

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, createSession, createSession, createSharedConnectionConsumer, createSharedDurableConnectionConsumer, 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