net.sf.dropboxmq.connections
Class ConnectionImpl

java.lang.Object
  net.sf.dropboxmq.connections.ConnectionImpl

All Implemented Interfaces:

Connection

Direct Known Subclasses:

QueueConnectionImpl, TopicConnectionImpl, XAConnectionImpl

public class ConnectionImpl
extends Object
implements Connection

Created: 09 Mar 2006

Version:

$Revision: 231 $, $Date: 2011-08-12 21:50:47 -0600 (Fri, 12 Aug 2011) $

Author:

Dwayne Schultz

Field Summary

static String	JMS_PROVIDER_NAME
static String	JMSX_DELIVERY_COUNT
static String	JMSX_GROUP_ID
static String	JMSX_GROUP_SEQ
static String	PROVIDER_VERSION

Constructor Summary

ConnectionImpl(ManagedConnectionImpl managedConnection, Configuration configuration)

Method Summary

void	addDurableSubscriptionName(String durableSubscriptionName)
protected void	addSession(SessionImpl session)
protected void	checkClosed()
void	close() Closes the connection.
ConnectionConsumer	createConnectionConsumer(Destination destination, String messageSelector, ServerSessionPool sessionPool, int maxMessages) Creates a connection consumer for this connection (optional operation).
ConnectionConsumer	createDurableConnectionConsumer(Topic topic, String subscriptionName, String messageSelector, ServerSessionPool sessionPool, int maxMessages) Create a durable connection consumer for this connection (optional operation).
Session	createNonXASession(boolean transacted, int acknowledgeMode)
Session	createSession(boolean transacted, int acknowledgeMode) Creates a Session object.
String	getClientID() Gets the client identifier for this connection.
protected Configuration	getConfiguration()
ExceptionListener	getExceptionListener() Gets the ExceptionListener object for this connection.
String	getLocalClientID()
protected Object	getLock()
ManagedConnectionImpl	getManagedConnection()
ConnectionMetaData	getMetaData() Gets the metadata for this connection.
DropboxTransaction	newDropboxTransaction(boolean transacted, int acknowledgeMode)
void	removeDurableSubscriptionName(String durableSubscriptionName)
void	removeServerConsumer(ServerConsumer serverConsumer)
void	removeSession(SessionImpl session)
void	setClientID(String clientID) Sets the client identifier for this connection.
void	setExceptionListener(ExceptionListener listener) Sets an exception listener for this connection.
void	start() Starts (or restarts) a connection's delivery of incoming messages.
void	stop() Temporarily stops a connection's delivery of incoming messages.
protected String	toObjectString()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

JMS_PROVIDER_NAME

public static final String JMS_PROVIDER_NAME

See Also:

Constant Field Values

PROVIDER_VERSION

public static final String PROVIDER_VERSION

See Also:

Constant Field Values

JMSX_DELIVERY_COUNT

public static final String JMSX_DELIVERY_COUNT

See Also:

Constant Field Values

JMSX_GROUP_ID

public static final String JMSX_GROUP_ID

See Also:

Constant Field Values

JMSX_GROUP_SEQ

public static final String JMSX_GROUP_SEQ

See Also:

Constant Field Values

Constructor Detail

ConnectionImpl

public ConnectionImpl(ManagedConnectionImpl managedConnection,
                      Configuration configuration)
               throws JMSException

Throws:

JMSException

Method Detail

createSession

public Session createSession(boolean transacted,
                             int acknowledgeMode)
                      throws JMSException

Description copied from interface: javax.jms.Connection

Creates a Session object.

Specified by:

createSession in interface Connection

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 session

Throws:

JMSException - if the Connection 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

createNonXASession

public Session createNonXASession(boolean transacted,
                                  int acknowledgeMode)
                           throws JMSException

Throws:

JMSException

newDropboxTransaction

public DropboxTransaction newDropboxTransaction(boolean transacted,
                                                int acknowledgeMode)

getClientID

public String getClientID()
                   throws JMSException

Description copied from interface: javax.jms.Connection

Gets the client identifier for this connection.

This value is specific to the JMS provider. It is either preconfigured by an administrator in a ConnectionFactory object or assigned dynamically by the application by calling the setClientID method.

Specified by:

getClientID in interface Connection

Returns:

the unique client identifier

Throws:

JMSException - if the JMS provider fails to return the client ID for this connection due to some internal error.

getLocalClientID

public String getLocalClientID()

setClientID

public void setClientID(String clientID)
                 throws JMSException

Description copied from interface: javax.jms.Connection

Sets the client identifier for this connection.

The preferred way to assign a JMS client's client identifier is for it to be configured in a client-specific ConnectionFactory object and transparently assigned to the Connection object it creates.

Alternatively, a client can set a connection's client identifier using a provider-specific value. The facility to set a connection's client identifier explicitly is not a mechanism for overriding the identifier that has been administratively configured. It is provided for the case where no administratively specified identifier exists. If one does exist, an attempt to change it by setting it must throw an IllegalStateException. If a client sets the client identifier explicitly, it must do so immediately after it creates the connection and before any other action on the connection is taken. After this point, setting the client identifier is a programming error that should throw an IllegalStateException.

The purpose of the client identifier is to associate a connection and its objects with a state maintained on behalf of the client by a provider. The only such state identified by the JMS API is that required to support durable subscriptions.

If another connection with the same clientID is already running when this method is called, the JMS provider should detect the duplicate ID and throw an InvalidClientIDException.

Specified by:

setClientID in interface Connection

Parameters:

clientID - the unique client identifier

Throws:

JMSException - if the JMS provider fails to set the client ID for this connection due to some internal error.

InvalidClientIDException - if the JMS client specifies an invalid or duplicate client ID.

IllegalStateException - if the JMS client attempts to set a connection's client ID at the wrong time or when it has been administratively configured.

getMetaData

public ConnectionMetaData getMetaData()
                               throws JMSException

Description copied from interface: javax.jms.Connection

Gets the metadata for this connection.

Specified by:

getMetaData in interface Connection

Returns:

the connection metadata

Throws:

JMSException - if the JMS provider fails to get the connection metadata for this connection.

See Also:

ConnectionMetaData

getExceptionListener

public ExceptionListener getExceptionListener()
                                       throws JMSException

Description copied from interface: javax.jms.Connection

Gets the ExceptionListener object for this connection. Not every Connection has an ExceptionListener associated with it.

Specified by:

getExceptionListener in interface Connection

Returns:

the ExceptionListener for this connection, or null. if no ExceptionListener is associated with this connection.

Throws:

JMSException - if the JMS provider fails to get the ExceptionListener for this connection.

See Also:

Connection.setExceptionListener(javax.jms.ExceptionListener)

setExceptionListener

public void setExceptionListener(ExceptionListener listener)
                          throws JMSException

Description copied from interface: javax.jms.Connection

Sets an exception listener for this connection.

If a JMS provider detects a serious problem with a connection, it informs the connection's ExceptionListener, if one has been registered. It does this by calling the listener's onException method, passing it a JMSException object describing the problem.

An exception listener allows a client to be notified of a problem asynchronously. Some connections only consume messages, so they would have no other way to learn their connection has failed.

A connection serializes execution of its ExceptionListener.

A JMS provider should attempt to resolve connection problems itself before it notifies the client of them.

Specified by:

setExceptionListener in interface Connection

Parameters:

listener - the exception listener

Throws:

JMSException - if the JMS provider fails to set the exception listener for this connection.

start

public void start()
           throws JMSException

Description copied from interface: javax.jms.Connection

Starts (or restarts) a connection's delivery of incoming messages. A call to start on a connection that has already been started is ignored.

Specified by:

start in interface Connection

Throws:

JMSException - if the JMS provider fails to start message delivery due to some internal error.

See Also:

Connection.stop()

stop

public void stop()
          throws JMSException

Description copied from interface: javax.jms.Connection

Temporarily stops a connection's delivery of incoming messages. Delivery can be restarted using the connection's start method. When the connection is stopped, delivery to all the connection's message consumers is inhibited: synchronous receives block, and messages are not delivered to message listeners.

This call blocks until receives and/or message listeners in progress have completed.

Stopping a connection has no effect on its ability to send messages. A call to stop on a connection that has already been stopped is ignored.

A call to stop must not return until delivery of messages has paused. This means that a client can rely on the fact that none of its message listeners will be called and that all threads of control waiting for receive calls to return will not return with a message until the connection is restarted. The receive timers for a stopped connection continue to advance, so receives may time out while the connection is stopped.

If message listeners are running when stop is invoked, the stop call must wait until all of them have returned before it may return. While these message listeners are completing, they must have the full services of the connection available to them.

Specified by:

stop in interface Connection

Throws:

JMSException - if the JMS provider fails to stop message delivery due to some internal error.

See Also:

Connection.start()

close

public void close()
           throws JMSException

Description copied from interface: javax.jms.Connection

Closes the connection.

Since a provider typically allocates significant resources outside the JVM on behalf of a connection, clients should close these resources when they are not needed. Relying on garbage collection to eventually reclaim these resources may not be timely enough.

There is no need to close the sessions, producers, and consumers of a closed connection.

Closing a connection causes all temporary destinations to be deleted.

When this method is invoked, it should not return until message processing has been shut down in an orderly fashion. This means that all message listeners that may have been running have returned, and that all pending receives have returned. A close terminates all pending message receives on the connection's sessions' consumers. The receives may return with a message or with null, depending on whether there was a message available at the time of the close. If one or more of the connection's sessions' message listeners is processing a message at the time when connection close is invoked, all the facilities of the connection and its sessions must remain available to those listeners until they return control to the JMS provider.

Closing a connection causes any of its sessions' transactions in progress to be rolled back. In the case where a session's work is coordinated by an external transaction manager, a session's commit and rollback methods are not used and the result of a closed session's work is determined later by the transaction manager. Closing a connection does NOT force an acknowledgment of client-acknowledged sessions.

Invoking the acknowledge method of a received message from a closed connection's session must throw an IllegalStateException. Closing a closed connection must NOT throw an exception.

Specified by:

close in interface Connection

Throws:

JMSException - if the JMS provider fails to close the connection due to some internal error. For example, a failure to release resources or to close a socket connection can cause this exception to be thrown.

createConnectionConsumer

public ConnectionConsumer createConnectionConsumer(Destination destination,
                                                   String messageSelector,
                                                   ServerSessionPool sessionPool,
                                                   int maxMessages)
                                            throws JMSException

Description copied from interface: javax.jms.Connection

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

Specified by:

createConnectionConsumer in interface Connection

Parameters:

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

InvalidSelectorException - if the message selector is invalid.

See Also:

ConnectionConsumer

createDurableConnectionConsumer

public ConnectionConsumer createDurableConnectionConsumer(Topic topic,
                                                          String subscriptionName,
                                                          String messageSelector,
                                                          ServerSessionPool sessionPool,
                                                          int maxMessages)
                                                   throws JMSException

Description copied from interface: javax.jms.Connection

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

Specified by:

createDurableConnectionConsumer in interface Connection

Parameters:

topic - topic to access

subscriptionName - durable subscription name

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 durable connection consumer

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

Returns:

the durable connection consumer

Throws:

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

InvalidSelectorException - if the message selector is invalid.

See Also:

ConnectionConsumer

addSession

protected void addSession(SessionImpl session)
                   throws JMSException

Throws:

JMSException

removeSession

public void removeSession(SessionImpl session)

removeServerConsumer

public void removeServerConsumer(ServerConsumer serverConsumer)

addDurableSubscriptionName

public void addDurableSubscriptionName(String durableSubscriptionName)
                                throws JMSException

Throws:

JMSException

removeDurableSubscriptionName

public void removeDurableSubscriptionName(String durableSubscriptionName)

checkClosed

protected void checkClosed()
                    throws IllegalStateException

Throws:

IllegalStateException

getManagedConnection

public ManagedConnectionImpl getManagedConnection()

getConfiguration

protected Configuration getConfiguration()

getLock

protected Object getLock()

toString

public String toString()

Overrides:

toString in class Object

toObjectString

protected final String toObjectString()