Class ActiveMQSession
- java.lang.Object
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- org.apache.activemq.ActiveMQSession
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- All Implemented Interfaces:
Runnable,QueueSession,Session,TopicSession,ActiveMQDispatcher,StatsCapable
- Direct Known Subclasses:
ActiveMQXASession
public class ActiveMQSession extends Object implements Session, QueueSession, TopicSession, StatsCapable, ActiveMQDispatcher
A
Sessionobject is a single-threaded context for producing and consuming messages. Although it may allocate provider resources outside the Java virtual machine (JVM), it is considered a lightweight JMS object.A session serves several purposes:
- It is a factory for its message producers and consumers.
- It supplies provider-optimized message factories.
- It is a factory for
TemporaryTopicsandTemporaryQueues. - It provides a way to create
QueueorTopicobjects for those clients that need to dynamically manipulate provider-specific destination names. - It supports a single series of transactions that combine work spanning its producers and consumers into atomic units.
- It defines a serial order for the messages it consumes and the messages it produces.
- It retains messages it consumes until they have been acknowledged.
- It serializes execution of message listeners registered with its message consumers.
- It is a factory for
QueueBrowsers.
A session can create and service multiple message producers and consumers.
One typical use is to have a thread block on a synchronous
MessageConsumeruntil a message arrives. The thread may then use one or more of theSession'sMessageProducers.If a client desires to have one thread produce messages while others consume them, the client should use a separate session for its producing thread.
Once a connection has been started, any session with one or more registered message listeners is dedicated to the thread of control that delivers messages to it. It is erroneous for client code to use this session or any of its constituent objects from another thread of control. The only exception to this rule is the use of the session or connection
closemethod.It should be easy for most clients to partition their work naturally into sessions. This model allows clients to start simply and incrementally add message processing complexity as their need for concurrency grows.
The
closemethod is the only session method that can be called while some other session method is being executed in another thread.A session may be specified as transacted. Each transacted session supports a single series of transactions. Each transaction groups a set of message sends and a set of message receives into an atomic unit of work. In effect, transactions organize a session's input message stream and output message stream into series of atomic units. When a transaction commits, its atomic unit of input is acknowledged and its associated atomic unit of output is sent. If a transaction rollback is done, the transaction's sent messages are destroyed and the session's input is automatically recovered.
The content of a transaction's input and output units is simply those messages that have been produced and consumed within the session's current transaction.
A transaction is completed using either its session's
commitmethod or its session'srollbackmethod. The completion of a session's current transaction automatically begins the next. The result is that a transacted session always has a current transaction within which its work is done.The Java Transaction Service (JTS) or some other transaction monitor may be used to combine a session's transaction with transactions on other resources (databases, other JMS sessions, etc.). Since Java distributed transactions are controlled via the Java Transaction API (JTA), use of the session's
commitandrollbackmethods in this context is prohibited.The JMS API does not require support for JTA; however, it does define how a provider supplies this support.
Although it is also possible for a JMS client to handle distributed transactions directly, it is unlikely that many JMS clients will do this. Support for JTA in the JMS API is targeted at systems vendors who will be integrating the JMS API into their application server products.
- See Also:
Session,QueueSession,TopicSession,XASession
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interfaceActiveMQSession.DeliveryListener
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Field Summary
Fields Modifier and Type Field Description protected intacknowledgementModeprotected booleanasyncDispatchprotected booleanclosedprotected ActiveMQConnectionconnectionprotected LongSequenceGeneratorconsumerIdGeneratorprotected CopyOnWriteArrayList<ActiveMQMessageConsumer>consumersprotected booleandebugprotected LongSequenceGeneratordeliveryIdGeneratorprotected ActiveMQSessionExecutorexecutorstatic intINDIVIDUAL_ACKNOWLEDGEOnly acknowledge an individual message - using message.acknowledge() as opposed to CLIENT_ACKNOWLEDGE which acknowledges all messages consumed by a session at when acknowledge() is calledprotected SessionInfoinfostatic intMAX_ACK_CONSTANTprotected LongSequenceGeneratorproducerIdGeneratorprotected CopyOnWriteArrayList<ActiveMQMessageProducer>producersprotected ObjectredeliveryGuardprotected ObjectsendMutexprotected booleansessionAsyncDispatchprotected AtomicBooleanstarted-
Fields inherited from interface javax.jms.Session
AUTO_ACKNOWLEDGE, CLIENT_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE, SESSION_TRANSACTED
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Constructor Summary
Constructors Modifier Constructor Description protectedActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch)protectedActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch, boolean sessionAsyncDispatch)Construct the Session
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidacknowledge()Acknowledges all consumed messages of the session of this consumed message.protected voidaddConsumer(ActiveMQMessageConsumer consumer)Add a message consumer.protected voidaddProducer(ActiveMQMessageProducer producer)Adds a message producer.voidasyncSendPacket(Command command)Send the asynchronous command.protected voidcheckClosed()Check if the session is closed.voidcheckMessageListener()voidclose()Closes the session.protected voidclose(ConsumerId id)voidcommit()Commits all messages done in this transaction and releases any locks currently held.protected voidconfigureMessage(ActiveMQMessage message)Checks that the session is not closed then configures the messageBlobMessagecreateBlobMessage(File file)Creates an initializedBlobMessageobject.BlobMessagecreateBlobMessage(InputStream in)Creates an initializedBlobMessageobject.BlobMessagecreateBlobMessage(URL url)Creates an initializedBlobMessageobject.BlobMessagecreateBlobMessage(URL url, boolean deletedByBroker)Creates an initializedBlobMessageobject.QueueBrowsercreateBrowser(Queue queue)Creates aQueueBrowserobject to peek at the messages on the specified queue.QueueBrowsercreateBrowser(Queue queue, String messageSelector)Creates aQueueBrowserobject to peek at the messages on the specified queue using a message selector.BytesMessagecreateBytesMessage()Creates aBytesMessageobject.MessageConsumercreateConsumer(Destination destination)Creates aMessageConsumerfor the specified destination.MessageConsumercreateConsumer(Destination destination, String messageSelector)Creates aMessageConsumerfor the specified destination, using a message selector.MessageConsumercreateConsumer(Destination destination, String messageSelector, boolean noLocal)CreatesMessageConsumerfor the specified destination, using a message selector.MessageConsumercreateConsumer(Destination destination, String messageSelector, boolean noLocal, MessageListener messageListener)CreatesMessageConsumerfor the specified destination, using a message selector.MessageConsumercreateConsumer(Destination destination, String messageSelector, MessageListener messageListener)Creates aMessageConsumerfor the specified destination, using a message selector.MessageConsumercreateConsumer(Destination destination, MessageListener messageListener)Creates aMessageConsumerfor the specified destination.TopicSubscribercreateDurableSubscriber(Topic topic, String name)Creates a durable subscriber to the specified topic.TopicSubscribercreateDurableSubscriber(Topic topic, String name, String messageSelector, boolean noLocal)Creates a durable subscriber to the specified topic, using a message selector and specifying whether messages published by its own connection should be delivered to it.MapMessagecreateMapMessage()Creates aMapMessageobject.MessagecreateMessage()Creates aMessageobject.ObjectMessagecreateObjectMessage()Creates anObjectMessageobject.ObjectMessagecreateObjectMessage(Serializable object)Creates an initializedObjectMessageobject.MessageProducercreateProducer(Destination destination)Creates aMessageProducerto send messages to the specified destination.TopicPublishercreatePublisher(Topic topic)Creates a publisher for the specified topic.QueuecreateQueue(String queueName)Creates a queue identity given aQueuename.QueueReceivercreateReceiver(Queue queue)Creates aQueueReceiverobject to receive messages from the specified queue.QueueReceivercreateReceiver(Queue queue, String messageSelector)Creates aQueueReceiverobject to receive messages from the specified queue using a message selector.QueueSendercreateSender(Queue queue)Creates aQueueSenderobject to send messages to the specified queue.StreamMessagecreateStreamMessage()Creates aStreamMessageobject.TopicSubscribercreateSubscriber(Topic topic)Creates a nondurable subscriber to the specified topic.TopicSubscribercreateSubscriber(Topic topic, String messageSelector, boolean noLocal)Creates a nondurable subscriber to the specified topic, using a message selector or specifying whether messages published by its own connection should be delivered to it.TemporaryQueuecreateTemporaryQueue()Creates aTemporaryQueueobject.TemporaryTopiccreateTemporaryTopic()Creates aTemporaryTopicobject.TextMessagecreateTextMessage()Creates aTextMessageobject.TextMessagecreateTextMessage(String text)Creates an initializedTextMessageobject.TopiccreateTopic(String topicName)Creates a topic identity given aTopicname.voiddispatch(MessageDispatch messageDispatch)voiddispose()protected voiddoStartTransaction()Send TransactionInfo to indicate transaction has startedintgetAcknowledgeMode()Returns the acknowledgement mode of the session.BlobTransferPolicygetBlobTransferPolicy()ActiveMQConnectiongetConnection()protected ThreadPoolExecutorgetConnectionExecutor()ActiveMQSession.DeliveryListenergetDeliveryListener()Returns the message delivery listener.longgetLastDeliveredSequenceId()highest sequence id of the last message delivered by this session.MessageListenergetMessageListener()Returns the session's distinguished message listener (optional).protected ConsumerIdgetNextConsumerId()longgetNextDeliveryId()protected ProducerIdgetNextProducerId()protected SchedulergetScheduler()protected SessionIdgetSessionId()Returns the session id.protected SessionInfogetSessionInfo()Returns the SessionInfo bean.JMSSessionStatsImplgetSessionStats()Returns the session's statistics.StatsImplgetStats()booleangetTransacted()Indicates whether the session is in transacted mode.TransactionContextgetTransactionContext()Returns the transaction context of the session.MessageTransformergetTransformer()List<MessageDispatch>getUnconsumedMessages()booleanhasUncomsumedMessages()Checks whether the session has unconsumed messages.booleanisAsyncDispatch()booleanisAutoAcknowledge()Checks whether the session used auto acknowledgment.protected booleanisClientAcknowledge()Checks whether the session used client acknowledgment.booleanisClosed()Checks if the session is closed.booleanisDupsOkAcknowledge()Checks whether the session used dup ok acknowledgment.booleanisIndividualAcknowledge()booleanisInUse(ActiveMQTempDestination destination)booleanisRunning()booleanisSessionAsyncDispatch()booleanisTransacted()Checks whether the session uses transactions.voidrecover()Stops message delivery in this session, and restarts message delivery with the oldest unacknowledged message.voidredispatch(ActiveMQDispatcher dispatcher, MessageDispatchChannel unconsumedMessages)protected voidremoveConsumer(ActiveMQMessageConsumer consumer)Remove the message consumer.protected voidremoveProducer(ActiveMQMessageProducer producer)Removes a message producer.voidrollback()Rolls back any messages done in this transaction and releases any locks currently held.voidrun()Optional operation, intended to be used only by Application Servers, not by ordinary JMS clients.protected voidsend(ActiveMQMessageProducer producer, ActiveMQDestination destination, Message message, int deliveryMode, int priority, long timeToLive, MemoryUsage producerWindow, int sendTimeout, AsyncCallback onComplete)Sends the message for dispatch by the broker.protected voidsendAck(MessageAck ack)protected voidsendAck(MessageAck ack, boolean lazy)voidsetAsyncDispatch(boolean asyncDispatch)voidsetBlobTransferPolicy(BlobTransferPolicy blobTransferPolicy)Sets the policy used to describe how out-of-band BLOBs (Binary Large OBjects) are transferred from producers to brokers to consumersvoidsetDeliveryListener(ActiveMQSession.DeliveryListener deliveryListener)Sets the message delivery listener.voidsetMessageListener(MessageListener listener)Sets the session's distinguished message listener (optional).protected voidsetOptimizeAcknowledge(boolean value)protected voidsetPrefetchSize(ConsumerId id, int prefetch)voidsetSessionAsyncDispatch(boolean sessionAsyncDispatch)voidsetTransactionContext(TransactionContext transactionContext)Sets the transaction context of the session.voidsetTransformer(MessageTransformer transformer)Sets the transformer used to transform messages before they are sent on to the JMS bus or when they are received from the bus but before they are delivered to the JMS clientprotected voidstart()Start this Session.protected voidstop()Stops this session.ResponsesyncSendPacket(Command command)Send the synchronous command.StringtoString()voidunsubscribe(String name)Unsubscribes a durable subscription that has been created by a client.
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Field Detail
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INDIVIDUAL_ACKNOWLEDGE
public static final int INDIVIDUAL_ACKNOWLEDGE
Only acknowledge an individual message - using message.acknowledge() as opposed to CLIENT_ACKNOWLEDGE which acknowledges all messages consumed by a session at when acknowledge() is called- See Also:
- Constant Field Values
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MAX_ACK_CONSTANT
public static final int MAX_ACK_CONSTANT
- See Also:
- Constant Field Values
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acknowledgementMode
protected int acknowledgementMode
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connection
protected final ActiveMQConnection connection
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info
protected final SessionInfo info
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consumerIdGenerator
protected final LongSequenceGenerator consumerIdGenerator
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producerIdGenerator
protected final LongSequenceGenerator producerIdGenerator
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deliveryIdGenerator
protected final LongSequenceGenerator deliveryIdGenerator
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executor
protected final ActiveMQSessionExecutor executor
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started
protected final AtomicBoolean started
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consumers
protected final CopyOnWriteArrayList<ActiveMQMessageConsumer> consumers
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producers
protected final CopyOnWriteArrayList<ActiveMQMessageProducer> producers
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closed
protected boolean closed
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asyncDispatch
protected boolean asyncDispatch
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sessionAsyncDispatch
protected boolean sessionAsyncDispatch
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debug
protected final boolean debug
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sendMutex
protected final Object sendMutex
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redeliveryGuard
protected final Object redeliveryGuard
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Constructor Detail
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ActiveMQSession
protected ActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch, boolean sessionAsyncDispatch) throws JMSException
Construct the Session- Parameters:
connection-sessionId-acknowledgeMode- n.b if transacted - the acknowledgeMode == Session.SESSION_TRANSACTEDasyncDispatch-sessionAsyncDispatch-- Throws:
JMSException- on internal error
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ActiveMQSession
protected ActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch) throws JMSException
- Throws:
JMSException
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Method Detail
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setTransactionContext
public void setTransactionContext(TransactionContext transactionContext)
Sets the transaction context of the session.- Parameters:
transactionContext- - provides the means to control a JMS transaction.
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getTransactionContext
public TransactionContext getTransactionContext()
Returns the transaction context of the session.- Returns:
- transactionContext - session's transaction context.
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getStats
public StatsImpl getStats()
- Specified by:
getStatsin interfaceStatsCapable- Returns:
- the Stats for this object
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getSessionStats
public JMSSessionStatsImpl getSessionStats()
Returns the session's statistics.- Returns:
- stats - session's statistics.
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createBytesMessage
public BytesMessage createBytesMessage() throws JMSException
Creates aBytesMessageobject. ABytesMessageobject is used to send a message containing a stream of uninterpreted bytes.- Specified by:
createBytesMessagein interfaceSession- Returns:
- the an ActiveMQBytesMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createMapMessage
public MapMessage createMapMessage() throws JMSException
Creates aMapMessageobject. AMapMessageobject is used to send a self-defining set of name-value pairs, where names areStringobjects and values are primitive values in the Java programming language.- Specified by:
createMapMessagein interfaceSession- Returns:
- an ActiveMQMapMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createMessage
public Message createMessage() throws JMSException
Creates aMessageobject. TheMessageinterface is the root interface of all JMS messages. AMessageobject holds all the standard message header information. It can be sent when a message containing only header information is sufficient.- Specified by:
createMessagein interfaceSession- Returns:
- an ActiveMQMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createObjectMessage
public ObjectMessage createObjectMessage() throws JMSException
Creates anObjectMessageobject. AnObjectMessageobject is used to send a message that contains a serializable Java object.- Specified by:
createObjectMessagein interfaceSession- Returns:
- an ActiveMQObjectMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createObjectMessage
public ObjectMessage createObjectMessage(Serializable object) throws JMSException
Creates an initializedObjectMessageobject. AnObjectMessageobject is used to send a message that contains a serializable Java object.- Specified by:
createObjectMessagein interfaceSession- Parameters:
object- the object to use to initialize this message- Returns:
- an ActiveMQObjectMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createStreamMessage
public StreamMessage createStreamMessage() throws JMSException
Creates aStreamMessageobject. AStreamMessageobject is used to send a self-defining stream of primitive values in the Java programming language.- Specified by:
createStreamMessagein interfaceSession- Returns:
- an ActiveMQStreamMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createTextMessage
public TextMessage createTextMessage() throws JMSException
Creates aTextMessageobject. ATextMessageobject is used to send a message containing aStringobject.- Specified by:
createTextMessagein interfaceSession- Returns:
- an ActiveMQTextMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createTextMessage
public TextMessage createTextMessage(String text) throws JMSException
Creates an initializedTextMessageobject. ATextMessageobject is used to send a message containing aString.- Specified by:
createTextMessagein interfaceSession- Parameters:
text- the string used to initialize this message- Returns:
- an ActiveMQTextMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createBlobMessage
public BlobMessage createBlobMessage(URL url) throws JMSException
Creates an initializedBlobMessageobject. ABlobMessageobject is used to send a message containing aURLwhich points to some network addressible BLOB.- Parameters:
url- the network addressable URL used to pass directly to the consumer- Returns:
- a BlobMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createBlobMessage
public BlobMessage createBlobMessage(URL url, boolean deletedByBroker) throws JMSException
Creates an initializedBlobMessageobject. ABlobMessageobject is used to send a message containing aURLwhich points to some network addressible BLOB.- Parameters:
url- the network addressable URL used to pass directly to the consumerdeletedByBroker- indicates whether or not the resource is deleted by the broker when the message is acknowledged- Returns:
- a BlobMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createBlobMessage
public BlobMessage createBlobMessage(File file) throws JMSException
Creates an initializedBlobMessageobject. ABlobMessageobject is used to send a message containing theFilecontent. Before the message is sent the file conent will be uploaded to the broker or some other remote repository depending on thegetBlobTransferPolicy().- Parameters:
file- the file to be uploaded to some remote repo (or the broker) depending on the strategy- Returns:
- a BlobMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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createBlobMessage
public BlobMessage createBlobMessage(InputStream in) throws JMSException
Creates an initializedBlobMessageobject. ABlobMessageobject is used to send a message containing theFilecontent. Before the message is sent the file conent will be uploaded to the broker or some other remote repository depending on thegetBlobTransferPolicy().
The caller of this method is responsible for closing the input stream that is used, however the stream can not be closed until after the message has been sent. To have this class manage the stream and close it automatically, use the method
createBlobMessage(File)- Parameters:
in- the stream to be uploaded to some remote repo (or the broker) depending on the strategy- Returns:
- a BlobMessage
- Throws:
JMSException- if the JMS provider fails to create this message due to some internal error.
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getTransacted
public boolean getTransacted() throws JMSExceptionIndicates whether the session is in transacted mode.- Specified by:
getTransactedin interfaceSession- Returns:
- true if the session is in transacted mode
- Throws:
JMSException- if there is some internal error.
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getAcknowledgeMode
public int getAcknowledgeMode() throws JMSExceptionReturns the acknowledgement mode of the session. The acknowledgement mode is set at the time that the session is created. If the session is transacted, the acknowledgement mode is ignored.- Specified by:
getAcknowledgeModein interfaceSession- Returns:
- If the session is not transacted, returns the current acknowledgement mode for the session. If the session is transacted, returns SESSION_TRANSACTED.
- Throws:
JMSException- Since:
- 1.1 exception JMSException if there is some internal error.
- See Also:
Connection.createSession(boolean,int)
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commit
public void commit() throws JMSExceptionCommits all messages done in this transaction and releases any locks currently held.- Specified by:
commitin interfaceSession- Throws:
JMSException- if the JMS provider fails to commit the transaction due to some internal error.TransactionRolledBackException- if the transaction is rolled back due to some internal error during commit.IllegalStateException- if the method is not called by a transacted session.
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rollback
public void rollback() throws JMSExceptionRolls back any messages done in this transaction and releases any locks currently held.- Specified by:
rollbackin interfaceSession- Throws:
JMSException- if the JMS provider fails to roll back the transaction due to some internal error.IllegalStateException- if the method is not called by a transacted session.
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close
public void close() throws JMSExceptionCloses the session.Since a provider may allocate some resources on behalf of a session outside the JVM, clients should close the 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 producers and consumers of a closed session.
This call will block until a
receivecall or message listener in progress has completed. A blocked message consumerreceivecall returnsnullwhen this session is closed.Closing a transacted session must roll back the transaction in progress.
This method is the only
Sessionmethod that can be called concurrently.Invoking any other
Sessionmethod on a closed session must throw aJMSException.IllegalStateException. Closing a closed session must not throw an exception.- Specified by:
closein interfaceSession- Throws:
JMSException- if the JMS provider fails to close the session due to some internal error.
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dispose
public void dispose() throws JMSException- Throws:
JMSException
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configureMessage
protected void configureMessage(ActiveMQMessage message) throws IllegalStateException
Checks that the session is not closed then configures the message- Throws:
IllegalStateException
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checkClosed
protected void checkClosed() throws IllegalStateExceptionCheck if the session is closed. It is used for ensuring that the session is open before performing various operations.- Throws:
IllegalStateException- if the Session is closed
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isClosed
public boolean isClosed()
Checks if the session is closed.- Returns:
- true if the session is closed, false otherwise.
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recover
public void recover() throws JMSExceptionStops message delivery in this session, and restarts message delivery with the oldest unacknowledged message.All consumers deliver messages in a serial order. Acknowledging a received message automatically acknowledges all messages that have been delivered to the client.
Restarting a session causes it to take the following actions:
- Stop message delivery
- Mark all messages that might have been delivered but not acknowledged as "redelivered"
- Restart the delivery sequence including all unacknowledged messages that had been previously delivered. Redelivered messages do not have to be delivered in exactly their original delivery order.
- Specified by:
recoverin interfaceSession- Throws:
JMSException- if the JMS provider fails to stop and restart message delivery due to some internal error.IllegalStateException- if the method is called by a transacted session.
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getMessageListener
public MessageListener getMessageListener() throws JMSException
Returns the session's distinguished message listener (optional).- Specified by:
getMessageListenerin interfaceSession- Returns:
- the message listener associated with this session
- Throws:
JMSException- if the JMS provider fails to get the message listener due to an internal error.- See Also:
Session.setMessageListener(javax.jms.MessageListener),ServerSessionPool,ServerSession
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setMessageListener
public void setMessageListener(MessageListener listener) throws JMSException
Sets the session's distinguished message listener (optional).When the distinguished message listener is set, no other form of message receipt in the session can be used; however, all forms of sending messages are still supported.
If this session has been closed, then an
IllegalStateExceptionis thrown, if trying to set a new listener. However setting the listener to null is allowed, to clear the listener, even if this session has been closed prior.This is an expert facility not used by regular JMS clients.
- Specified by:
setMessageListenerin interfaceSession- Parameters:
listener- the message listener to associate with this session- Throws:
JMSException- if the JMS provider fails to set the message listener due to an internal error.- See Also:
Session.getMessageListener(),ServerSessionPool,ServerSession
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run
public void run()
Optional operation, intended to be used only by Application Servers, not by ordinary JMS clients.- Specified by:
runin interfaceRunnable- Specified by:
runin interfaceSession- See Also:
ServerSession
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createProducer
public MessageProducer createProducer(Destination destination) throws JMSException
Creates aMessageProducerto send messages to the specified destination.A client uses a
MessageProducerobject to send messages to a destination. SinceQueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageProducerobject.- Specified by:
createProducerin interfaceSession- Parameters:
destination- theDestinationto send to, or null if this is a producer which does not have a specified destination.- Returns:
- the MessageProducer
- Throws:
JMSException- if the session fails to create a MessageProducer due to some internal error.InvalidDestinationException- if an invalid destination is specified.- Since:
- 1.1
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createConsumer
public MessageConsumer createConsumer(Destination destination) throws JMSException
Creates aMessageConsumerfor the specified destination. SinceQueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageConsumer.- Specified by:
createConsumerin interfaceSession- Parameters:
destination- theDestinationto access.- Returns:
- the MessageConsumer
- Throws:
JMSException- if the session fails to create a consumer due to some internal error.InvalidDestinationException- if an invalid destination is specified.- Since:
- 1.1
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createConsumer
public MessageConsumer createConsumer(Destination destination, String messageSelector) throws JMSException
Creates aMessageConsumerfor the specified destination, using a message selector. SinceQueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageConsumer.A client uses a
MessageConsumerobject to receive messages that have been sent to a destination.- Specified by:
createConsumerin interfaceSession- Parameters:
destination- theDestinationto accessmessageSelector- 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.- Returns:
- the MessageConsumer
- Throws:
JMSException- if the session fails to create a MessageConsumer due to some internal error.InvalidDestinationException- if an invalid destination is specified.InvalidSelectorException- if the message selector is invalid.- Since:
- 1.1
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createConsumer
public MessageConsumer createConsumer(Destination destination, MessageListener messageListener) throws JMSException
Creates aMessageConsumerfor the specified destination. SinceQueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageConsumer.- Parameters:
destination- theDestinationto access.messageListener- the listener to use for async consumption of messages- Returns:
- the MessageConsumer
- Throws:
JMSException- if the session fails to create a consumer due to some internal error.InvalidDestinationException- if an invalid destination is specified.- Since:
- 1.1
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createConsumer
public MessageConsumer createConsumer(Destination destination, String messageSelector, MessageListener messageListener) throws JMSException
Creates aMessageConsumerfor the specified destination, using a message selector. SinceQueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageConsumer.A client uses a
MessageConsumerobject to receive messages that have been sent to a destination.- Parameters:
destination- theDestinationto accessmessageSelector- 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.messageListener- the listener to use for async consumption of messages- Returns:
- the MessageConsumer
- Throws:
JMSException- if the session fails to create a MessageConsumer due to some internal error.InvalidDestinationException- if an invalid destination is specified.InvalidSelectorException- if the message selector is invalid.- Since:
- 1.1
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createConsumer
public MessageConsumer createConsumer(Destination destination, String messageSelector, boolean noLocal) throws JMSException
CreatesMessageConsumerfor the specified destination, using a message selector. This method can specify whether messages published by its own connection should be delivered to it, if the destination is a topic.Since
QueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageConsumer.A client uses a
MessageConsumerobject to receive messages that have been published to a destination.In some cases, a connection may both publish and subscribe to a topic. The consumer
NoLocalattribute allows a consumer to inhibit the delivery of messages published by its own connection. The default value for this attribute is False. ThenoLocalvalue must be supported by destinations that are topics.- Specified by:
createConsumerin interfaceSession- Parameters:
destination- theDestinationto accessmessageSelector- 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.noLocal- - if true, and the destination is a topic, inhibits the delivery of messages published by its own connection. The behavior forNoLocalis not specified if the destination is a queue.- Returns:
- the MessageConsumer
- Throws:
JMSException- if the session fails to create a MessageConsumer due to some internal error.InvalidDestinationException- if an invalid destination is specified.InvalidSelectorException- if the message selector is invalid.- Since:
- 1.1
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createConsumer
public MessageConsumer createConsumer(Destination destination, String messageSelector, boolean noLocal, MessageListener messageListener) throws JMSException
CreatesMessageConsumerfor the specified destination, using a message selector. This method can specify whether messages published by its own connection should be delivered to it, if the destination is a topic.Since
QueueandTopicboth inherit fromDestination, they can be used in the destination parameter to create aMessageConsumer.A client uses a
MessageConsumerobject to receive messages that have been published to a destination.In some cases, a connection may both publish and subscribe to a topic. The consumer
NoLocalattribute allows a consumer to inhibit the delivery of messages published by its own connection. The default value for this attribute is False. ThenoLocalvalue must be supported by destinations that are topics.- Parameters:
destination- theDestinationto accessmessageSelector- 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.noLocal- - if true, and the destination is a topic, inhibits the delivery of messages published by its own connection. The behavior forNoLocalis not specified if the destination is a queue.messageListener- the listener to use for async consumption of messages- Returns:
- the MessageConsumer
- Throws:
JMSException- if the session fails to create a MessageConsumer due to some internal error.InvalidDestinationException- if an invalid destination is specified.InvalidSelectorException- if the message selector is invalid.- Since:
- 1.1
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createQueue
public Queue createQueue(String queueName) throws JMSException
Creates a queue identity given aQueuename.This facility is provided for the rare cases where clients need to dynamically manipulate queue identity. It allows the creation of a queue identity with a provider-specific name. Clients that depend on this ability are not portable.
Note that this method is not for creating the physical queue. The physical creation of queues is an administrative task and is not to be initiated by the JMS API. The one exception is the creation of temporary queues, which is accomplished with the
createTemporaryQueuemethod.- Specified by:
createQueuein interfaceQueueSession- Specified by:
createQueuein interfaceSession- Parameters:
queueName- the name of thisQueue- Returns:
- a
Queuewith the given name - Throws:
JMSException- if the session fails to create a queue due to some internal error.- Since:
- 1.1
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createTopic
public Topic createTopic(String topicName) throws JMSException
Creates a topic identity given aTopicname.This facility is provided for the rare cases where clients need to dynamically manipulate topic identity. This allows the creation of a topic identity with a provider-specific name. Clients that depend on this ability are not portable.
Note that this method is not for creating the physical topic. The physical creation of topics is an administrative task and is not to be initiated by the JMS API. The one exception is the creation of temporary topics, which is accomplished with the
createTemporaryTopicmethod.- Specified by:
createTopicin interfaceSession- Specified by:
createTopicin interfaceTopicSession- Parameters:
topicName- the name of thisTopic- Returns:
- a
Topicwith the given name - Throws:
JMSException- if the session fails to create a topic due to some internal error.- Since:
- 1.1
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createDurableSubscriber
public TopicSubscriber createDurableSubscriber(Topic topic, String name) throws JMSException
Creates a durable subscriber to the specified topic.If a client needs to receive all the messages published on a topic, including the ones published while the subscriber is inactive, it uses a durable
TopicSubscriber. The JMS provider retains a record of this durable subscription and insures that all messages from the topic's publishers are retained until they are acknowledged by this durable subscriber or they have expired.Sessions with durable subscribers must always provide the same client identifier. In addition, each client must specify a name that uniquely identifies (within client identifier) each durable subscription it creates. Only one session at a time can have a
TopicSubscriberfor a particular durable subscription.A client can change an existing durable subscription by creating a durable
TopicSubscriberwith the same name and a new topic and/or message selector. Changing a durable subscriber is equivalent to unsubscribing (deleting) the old one and creating a new one.In some cases, a connection may both publish and subscribe to a topic. The subscriber
NoLocalattribute allows a subscriber to inhibit the delivery of messages published by its own connection. The default value for this attribute is false.- Specified by:
createDurableSubscriberin interfaceSession- Specified by:
createDurableSubscriberin interfaceTopicSession- Parameters:
topic- the non-temporaryTopicto subscribe toname- the name used to identify this subscription- Returns:
- the TopicSubscriber
- Throws:
JMSException- if the session fails to create a subscriber due to some internal error.InvalidDestinationException- if an invalid topic is specified.- Since:
- 1.1
-
createDurableSubscriber
public TopicSubscriber createDurableSubscriber(Topic topic, String name, String messageSelector, boolean noLocal) throws JMSException
Creates a durable subscriber to the specified topic, using a message selector and specifying whether messages published by its own connection should be delivered to it.If a client needs to receive all the messages published on a topic, including the ones published while the subscriber is inactive, it uses a durable
TopicSubscriber. The JMS provider retains a record of this durable subscription and insures that all messages from the topic's publishers are retained until they are acknowledged by this durable subscriber or they have expired.Sessions with durable subscribers must always provide the same client identifier. In addition, each client must specify a name which uniquely identifies (within client identifier) each durable subscription it creates. Only one session at a time can have a
TopicSubscriberfor a particular durable subscription. An inactive durable subscriber is one that exists but does not currently have a message consumer associated with it.A client can change an existing durable subscription by creating a durable
TopicSubscriberwith the same name and a new topic and/or message selector. Changing a durable subscriber is equivalent to unsubscribing (deleting) the old one and creating a new one.- Specified by:
createDurableSubscriberin interfaceSession- Specified by:
createDurableSubscriberin interfaceTopicSession- Parameters:
topic- the non-temporaryTopicto subscribe toname- the name used to identify this subscriptionmessageSelector- 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.noLocal- if set, inhibits the delivery of messages published by its own connection- Returns:
- the Queue Browser
- Throws:
JMSException- if the session fails to create a subscriber due to some internal error.InvalidDestinationException- if an invalid topic is specified.InvalidSelectorException- if the message selector is invalid.- Since:
- 1.1
-
createBrowser
public QueueBrowser createBrowser(Queue queue) throws JMSException
Creates aQueueBrowserobject to peek at the messages on the specified queue.- Specified by:
createBrowserin interfaceQueueSession- Specified by:
createBrowserin interfaceSession- Parameters:
queue- thequeueto access- Returns:
- the Queue Browser
- Throws:
JMSException- if the session fails to create a browser due to some internal error.InvalidDestinationException- if an invalid destination is specified- Since:
- 1.1
-
createBrowser
public QueueBrowser createBrowser(Queue queue, String messageSelector) throws JMSException
Creates aQueueBrowserobject to peek at the messages on the specified queue using a message selector.- Specified by:
createBrowserin interfaceQueueSession- Specified by:
createBrowserin interfaceSession- Parameters:
queue- thequeueto accessmessageSelector- 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.- Returns:
- the Queue Browser
- Throws:
JMSException- if the session fails to create a browser due to some internal error.InvalidDestinationException- if an invalid destination is specifiedInvalidSelectorException- if the message selector is invalid.- Since:
- 1.1
-
createTemporaryQueue
public TemporaryQueue createTemporaryQueue() throws JMSException
Creates aTemporaryQueueobject. Its lifetime will be that of theConnectionunless it is deleted earlier.- Specified by:
createTemporaryQueuein interfaceQueueSession- Specified by:
createTemporaryQueuein interfaceSession- Returns:
- a temporary queue identity
- Throws:
JMSException- if the session fails to create a temporary queue due to some internal error.- Since:
- 1.1
-
createTemporaryTopic
public TemporaryTopic createTemporaryTopic() throws JMSException
Creates aTemporaryTopicobject. Its lifetime will be that of theConnectionunless it is deleted earlier.- Specified by:
createTemporaryTopicin interfaceSession- Specified by:
createTemporaryTopicin interfaceTopicSession- Returns:
- a temporary topic identity
- Throws:
JMSException- if the session fails to create a temporary topic due to some internal error.- Since:
- 1.1
-
createReceiver
public QueueReceiver createReceiver(Queue queue) throws JMSException
Creates aQueueReceiverobject to receive messages from the specified queue.- Specified by:
createReceiverin interfaceQueueSession- Parameters:
queue- theQueueto access- Returns:
- a new QueueBrowser instance.
- Throws:
JMSException- if the session fails to create a receiver due to some internal error.JMSExceptionInvalidDestinationException- if an invalid queue is specified.
-
createReceiver
public QueueReceiver createReceiver(Queue queue, String messageSelector) throws JMSException
Creates aQueueReceiverobject to receive messages from the specified queue using a message selector.- Specified by:
createReceiverin interfaceQueueSession- Parameters:
queue- theQueueto accessmessageSelector- 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.- Returns:
- QueueReceiver
- Throws:
JMSException- if the session fails to create a receiver due to some internal error.InvalidDestinationException- if an invalid queue is specified.InvalidSelectorException- if the message selector is invalid.
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createSender
public QueueSender createSender(Queue queue) throws JMSException
Creates aQueueSenderobject to send messages to the specified queue.- Specified by:
createSenderin interfaceQueueSession- Parameters:
queue- theQueueto access, or null if this is an unidentified producer- Returns:
- QueueSender
- Throws:
JMSException- if the session fails to create a sender due to some internal error.InvalidDestinationException- if an invalid queue is specified.
-
createSubscriber
public TopicSubscriber createSubscriber(Topic topic) throws JMSException
Creates a nondurable subscriber to the specified topic.A client uses a
TopicSubscriberobject to receive messages that have been published to a topic.Regular
TopicSubscriberobjects are not durable. They receive only messages that are published while they are active.In some cases, a connection may both publish and subscribe to a topic. The subscriber
NoLocalattribute allows a subscriber to inhibit the delivery of messages published by its own connection. The default value for this attribute is false.- Specified by:
createSubscriberin interfaceTopicSession- Parameters:
topic- theTopicto subscribe to- Returns:
- TopicSubscriber
- Throws:
JMSException- if the session fails to create a subscriber due to some internal error.InvalidDestinationException- if an invalid topic is specified.
-
createSubscriber
public TopicSubscriber createSubscriber(Topic topic, String messageSelector, boolean noLocal) throws JMSException
Creates a nondurable subscriber to the specified topic, using a message selector or specifying whether messages published by its own connection should be delivered to it.A client uses a
TopicSubscriberobject to receive messages that have been published to a topic.Regular
TopicSubscriberobjects are not durable. They receive only messages that are published while they are active.Messages filtered out by a subscriber's message selector will never be delivered to the subscriber. From the subscriber's perspective, they do not exist.
In some cases, a connection may both publish and subscribe to a topic. The subscriber
NoLocalattribute allows a subscriber to inhibit the delivery of messages published by its own connection. The default value for this attribute is false.- Specified by:
createSubscriberin interfaceTopicSession- Parameters:
topic- theTopicto subscribe tomessageSelector- 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.noLocal- if set, inhibits the delivery of messages published by its own connection- Returns:
- TopicSubscriber
- Throws:
JMSException- if the session fails to create a subscriber due to some internal error.InvalidDestinationException- if an invalid topic is specified.InvalidSelectorException- if the message selector is invalid.
-
createPublisher
public TopicPublisher createPublisher(Topic topic) throws JMSException
Creates a publisher for the specified topic.A client uses a
TopicPublisherobject to publish messages on a topic. Each time a client creates aTopicPublisheron a topic, it defines a new sequence of messages that have no ordering relationship with the messages it has previously sent.- Specified by:
createPublisherin interfaceTopicSession- Parameters:
topic- theTopicto publish to, or null if this is an unidentified producer- Returns:
- TopicPublisher
- Throws:
JMSException- if the session fails to create a publisher due to some internal error.InvalidDestinationException- if an invalid topic is specified.
-
unsubscribe
public void unsubscribe(String name) throws JMSException
Unsubscribes a durable subscription that has been created by a client.This method deletes the state being maintained on behalf of the subscriber by its provider.
It is erroneous for a client to delete a durable subscription while there is an active
MessageConsumerorTopicSubscriberfor the subscription, or while a consumed message is part of a pending transaction or has not been acknowledged in the session.- Specified by:
unsubscribein interfaceSession- Specified by:
unsubscribein interfaceTopicSession- Parameters:
name- the name used to identify this subscription- Throws:
JMSException- if the session fails to unsubscribe to the durable subscription due to some internal error.InvalidDestinationException- if an invalid subscription name is specified.- Since:
- 1.1
-
dispatch
public void dispatch(MessageDispatch messageDispatch)
- Specified by:
dispatchin interfaceActiveMQDispatcher
-
acknowledge
public void acknowledge() throws JMSExceptionAcknowledges all consumed messages of the session of this consumed message.All consumed JMS messages support the
acknowledgemethod for use when a client has specified that its JMS session's consumed messages are to be explicitly acknowledged. By invokingacknowledgeon a consumed message, a client acknowledges all messages consumed by the session that the message was delivered to.Calls to
acknowledgeare ignored for both transacted sessions and sessions specified to use implicit acknowledgement modes.A client may individually acknowledge each message as it is consumed, or it may choose to acknowledge messages as an application-defined group (which is done by calling acknowledge on the last received message of the group, thereby acknowledging all messages consumed by the session.)
Messages that have been received but not acknowledged may be redelivered.
- Throws:
JMSException- if the JMS provider fails to acknowledge the messages due to some internal error.IllegalStateException- if this method is called on a closed session.- See Also:
Session.CLIENT_ACKNOWLEDGE
-
addConsumer
protected void addConsumer(ActiveMQMessageConsumer consumer) throws JMSException
Add a message consumer.- Parameters:
consumer- - message consumer.- Throws:
JMSException
-
removeConsumer
protected void removeConsumer(ActiveMQMessageConsumer consumer)
Remove the message consumer.- Parameters:
consumer- - consumer to be removed.- Throws:
JMSException
-
addProducer
protected void addProducer(ActiveMQMessageProducer producer) throws JMSException
Adds a message producer.- Parameters:
producer- - message producer to be added.- Throws:
JMSException
-
removeProducer
protected void removeProducer(ActiveMQMessageProducer producer)
Removes a message producer.- Parameters:
producer- - message producer to be removed.- Throws:
JMSException
-
start
protected void start() throws JMSExceptionStart this Session.- Throws:
JMSException
-
stop
protected void stop() throws JMSExceptionStops this session.- Throws:
JMSException
-
getSessionId
protected SessionId getSessionId()
Returns the session id.- Returns:
- value - session id.
-
getNextConsumerId
protected ConsumerId getNextConsumerId()
- Returns:
- a unique ConsumerId instance.
-
getNextProducerId
protected ProducerId getNextProducerId()
- Returns:
- a unique ProducerId instance.
-
send
protected void send(ActiveMQMessageProducer producer, ActiveMQDestination destination, Message message, int deliveryMode, int priority, long timeToLive, MemoryUsage producerWindow, int sendTimeout, AsyncCallback onComplete) throws JMSException
Sends the message for dispatch by the broker.- Parameters:
producer- - message producer.destination- - message destination.message- - message to be sent.deliveryMode- - JMS message delivery mode.priority- - message priority.timeToLive- - message expiration.producerWindow-onComplete-- Throws:
JMSException
-
doStartTransaction
protected void doStartTransaction() throws JMSExceptionSend TransactionInfo to indicate transaction has started- Throws:
JMSException- if some internal error occurs
-
hasUncomsumedMessages
public boolean hasUncomsumedMessages()
Checks whether the session has unconsumed messages.- Returns:
- true - if there are unconsumed messages.
-
isTransacted
public boolean isTransacted()
Checks whether the session uses transactions.- Returns:
- true - if the session uses transactions.
-
isClientAcknowledge
protected boolean isClientAcknowledge()
Checks whether the session used client acknowledgment.- Returns:
- true - if the session uses client acknowledgment.
-
isAutoAcknowledge
public boolean isAutoAcknowledge()
Checks whether the session used auto acknowledgment.- Returns:
- true - if the session uses client acknowledgment.
-
isDupsOkAcknowledge
public boolean isDupsOkAcknowledge()
Checks whether the session used dup ok acknowledgment.- Returns:
- true - if the session uses client acknowledgment.
-
isIndividualAcknowledge
public boolean isIndividualAcknowledge()
-
getDeliveryListener
public ActiveMQSession.DeliveryListener getDeliveryListener()
Returns the message delivery listener.- Returns:
- deliveryListener - message delivery listener.
-
setDeliveryListener
public void setDeliveryListener(ActiveMQSession.DeliveryListener deliveryListener)
Sets the message delivery listener.- Parameters:
deliveryListener- - message delivery listener.
-
getSessionInfo
protected SessionInfo getSessionInfo() throws JMSException
Returns the SessionInfo bean.- Returns:
- info - SessionInfo bean.
- Throws:
JMSException
-
asyncSendPacket
public void asyncSendPacket(Command command) throws JMSException
Send the asynchronous command.- Parameters:
command- - command to be executed.- Throws:
JMSException
-
syncSendPacket
public Response syncSendPacket(Command command) throws JMSException
Send the synchronous command.- Parameters:
command- - command to be executed.- Returns:
- Response
- Throws:
JMSException
-
getNextDeliveryId
public long getNextDeliveryId()
-
redispatch
public void redispatch(ActiveMQDispatcher dispatcher, MessageDispatchChannel unconsumedMessages) throws JMSException
- Throws:
JMSException
-
isRunning
public boolean isRunning()
-
isAsyncDispatch
public boolean isAsyncDispatch()
-
setAsyncDispatch
public void setAsyncDispatch(boolean asyncDispatch)
-
isSessionAsyncDispatch
public boolean isSessionAsyncDispatch()
- Returns:
- Returns the sessionAsyncDispatch.
-
setSessionAsyncDispatch
public void setSessionAsyncDispatch(boolean sessionAsyncDispatch)
- Parameters:
sessionAsyncDispatch- The sessionAsyncDispatch to set.
-
getTransformer
public MessageTransformer getTransformer()
-
getConnection
public ActiveMQConnection getConnection()
-
setTransformer
public void setTransformer(MessageTransformer transformer)
Sets the transformer used to transform messages before they are sent on to the JMS bus or when they are received from the bus but before they are delivered to the JMS client
-
getBlobTransferPolicy
public BlobTransferPolicy getBlobTransferPolicy()
-
setBlobTransferPolicy
public void setBlobTransferPolicy(BlobTransferPolicy blobTransferPolicy)
Sets the policy used to describe how out-of-band BLOBs (Binary Large OBjects) are transferred from producers to brokers to consumers
-
getUnconsumedMessages
public List<MessageDispatch> getUnconsumedMessages()
-
checkMessageListener
public void checkMessageListener() throws JMSException- Throws:
JMSException
-
setOptimizeAcknowledge
protected void setOptimizeAcknowledge(boolean value)
-
setPrefetchSize
protected void setPrefetchSize(ConsumerId id, int prefetch)
-
close
protected void close(ConsumerId id)
-
isInUse
public boolean isInUse(ActiveMQTempDestination destination)
-
getLastDeliveredSequenceId
public long getLastDeliveredSequenceId()
highest sequence id of the last message delivered by this session. Passed to the broker in the close command, maintained by dispose()- Returns:
- lastDeliveredSequenceId
-
sendAck
protected void sendAck(MessageAck ack) throws JMSException
- Throws:
JMSException
-
sendAck
protected void sendAck(MessageAck ack, boolean lazy) throws JMSException
- Throws:
JMSException
-
getScheduler
protected Scheduler getScheduler() throws JMSException
- Throws:
JMSException
-
getConnectionExecutor
protected ThreadPoolExecutor getConnectionExecutor()
-
-