public class ActiveMQSession extends Object implements Session, QueueSession, TopicSession, StatsCapable, ActiveMQDispatcher
A Session object 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:
TemporaryTopics and
TemporaryQueues.
Queue or Topic
objects for those clients that need to dynamically manipulate
provider-specific destination names.
QueueBrowsers.
A session can create and service multiple message producers and consumers.
One typical use is to have a thread block on a synchronous
MessageConsumer until a message arrives. The thread may then
use one or more of the Session'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 close
method.
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 close method 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 commit
method or its session's rollback method. 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
commit and rollback methods 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.
Session,
QueueSession,
TopicSession,
XASession| Modifier and Type | Class and Description |
|---|---|
static interface |
ActiveMQSession.DeliveryListener |
| Modifier and Type | Field and Description |
|---|---|
protected int |
acknowledgementMode |
protected boolean |
asyncDispatch |
protected boolean |
closed |
protected ActiveMQConnection |
connection |
protected LongSequenceGenerator |
consumerIdGenerator |
protected CopyOnWriteArrayList<ActiveMQMessageConsumer> |
consumers |
protected boolean |
debug |
protected LongSequenceGenerator |
deliveryIdGenerator |
protected ActiveMQSessionExecutor |
executor |
static 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
|
protected SessionInfo |
info |
static int |
MAX_ACK_CONSTANT |
protected LongSequenceGenerator |
producerIdGenerator |
protected CopyOnWriteArrayList<ActiveMQMessageProducer> |
producers |
protected Object |
redeliveryGuard |
protected Object |
sendMutex |
protected boolean |
sessionAsyncDispatch |
protected AtomicBoolean |
started |
AUTO_ACKNOWLEDGE, CLIENT_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE, SESSION_TRANSACTED| Modifier | Constructor and Description |
|---|---|
protected |
ActiveMQSession(ActiveMQConnection connection,
SessionId sessionId,
int acknowledgeMode,
boolean asyncDispatch) |
protected |
ActiveMQSession(ActiveMQConnection connection,
SessionId sessionId,
int acknowledgeMode,
boolean asyncDispatch,
boolean sessionAsyncDispatch)
Construct the Session
|
| Modifier and Type | Method and Description |
|---|---|
void |
acknowledge()
Acknowledges all consumed messages of the session of this consumed
message.
|
protected void |
addConsumer(ActiveMQMessageConsumer consumer)
Add a message consumer.
|
protected void |
addProducer(ActiveMQMessageProducer producer)
Adds a message producer.
|
void |
asyncSendPacket(Command command)
Send the asynchronus command.
|
protected void |
checkClosed()
Check if the session is closed.
|
void |
checkMessageListener() |
void |
close()
Closes the session.
|
protected void |
close(ConsumerId id) |
void |
commit()
Commits all messages done in this transaction and releases any locks
currently held.
|
protected void |
configureMessage(ActiveMQMessage message)
Checks that the session is not closed then configures the message
|
BlobMessage |
createBlobMessage(File file)
Creates an initialized
BlobMessage object. |
BlobMessage |
createBlobMessage(InputStream in)
Creates an initialized
BlobMessage object. |
BlobMessage |
createBlobMessage(URL url)
Creates an initialized
BlobMessage object. |
BlobMessage |
createBlobMessage(URL url,
boolean deletedByBroker)
Creates an initialized
BlobMessage object. |
QueueBrowser |
createBrowser(Queue queue)
Creates a
QueueBrowser object to peek at the messages on
the specified queue. |
QueueBrowser |
createBrowser(Queue queue,
String messageSelector)
Creates a
QueueBrowser object to peek at the messages on
the specified queue using a message selector. |
BytesMessage |
createBytesMessage()
Creates a
BytesMessage object. |
MessageConsumer |
createConsumer(Destination destination)
Creates a
MessageConsumer for the specified destination. |
MessageConsumer |
createConsumer(Destination destination,
MessageListener messageListener)
Creates a
MessageConsumer for the specified destination. |
MessageConsumer |
createConsumer(Destination destination,
String messageSelector)
Creates a
MessageConsumer for the specified destination,
using a message selector. |
MessageConsumer |
createConsumer(Destination destination,
String messageSelector,
boolean noLocal)
Creates
MessageConsumer for the specified destination,
using a message selector. |
MessageConsumer |
createConsumer(Destination destination,
String messageSelector,
boolean noLocal,
MessageListener messageListener)
Creates
MessageConsumer for the specified destination,
using a message selector. |
MessageConsumer |
createConsumer(Destination destination,
String messageSelector,
MessageListener messageListener)
Creates a
MessageConsumer for the specified destination,
using a message selector. |
TopicSubscriber |
createDurableSubscriber(Topic topic,
String name)
Creates a durable subscriber to the specified topic.
|
TopicSubscriber |
createDurableSubscriber(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.
|
MapMessage |
createMapMessage()
Creates a
MapMessage object. |
Message |
createMessage()
Creates a
Message object. |
ObjectMessage |
createObjectMessage()
Creates an
ObjectMessage object. |
ObjectMessage |
createObjectMessage(Serializable object)
Creates an initialized
ObjectMessage object. |
MessageProducer |
createProducer(Destination destination)
Creates a
MessageProducer to send messages to the
specified destination. |
TopicPublisher |
createPublisher(Topic topic)
Creates a publisher for the specified topic.
|
Queue |
createQueue(String queueName)
Creates a queue identity given a
Queue name. |
QueueReceiver |
createReceiver(Queue queue)
Creates a
QueueReceiver object to receive messages from
the specified queue. |
QueueReceiver |
createReceiver(Queue queue,
String messageSelector)
Creates a
QueueReceiver object to receive messages from
the specified queue using a message selector. |
QueueSender |
createSender(Queue queue)
Creates a
QueueSender object to send messages to the
specified queue. |
StreamMessage |
createStreamMessage()
Creates a
StreamMessage object. |
TopicSubscriber |
createSubscriber(Topic topic)
Creates a nondurable subscriber to the specified topic.
|
TopicSubscriber |
createSubscriber(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.
|
TemporaryQueue |
createTemporaryQueue()
Creates a
TemporaryQueue object. |
TemporaryTopic |
createTemporaryTopic()
Creates a
TemporaryTopic object. |
TextMessage |
createTextMessage()
Creates a
TextMessage object. |
TextMessage |
createTextMessage(String text)
Creates an initialized
TextMessage object. |
Topic |
createTopic(String topicName)
Creates a topic identity given a
Topic name. |
void |
dispatch(MessageDispatch messageDispatch) |
void |
dispose() |
protected void |
doStartTransaction()
Send TransactionInfo to indicate transaction has started
|
int |
getAcknowledgeMode()
Returns the acknowledgement mode of the session.
|
BlobTransferPolicy |
getBlobTransferPolicy() |
ActiveMQConnection |
getConnection() |
protected ThreadPoolExecutor |
getConnectionExecutor() |
ActiveMQSession.DeliveryListener |
getDeliveryListener()
Returns the message delivery listener.
|
long |
getLastDeliveredSequenceId()
highest sequence id of the last message delivered by this session.
|
MessageListener |
getMessageListener()
Returns the session's distinguished message listener (optional).
|
protected ConsumerId |
getNextConsumerId() |
long |
getNextDeliveryId() |
protected ProducerId |
getNextProducerId() |
protected Scheduler |
getScheduler() |
protected SessionId |
getSessionId()
Returns the session id.
|
protected SessionInfo |
getSessionInfo()
Returns the SessionInfo bean.
|
JMSSessionStatsImpl |
getSessionStats()
Returns the session's statistics.
|
StatsImpl |
getStats() |
boolean |
getTransacted()
Indicates whether the session is in transacted mode.
|
TransactionContext |
getTransactionContext()
Returns the transaction context of the session.
|
MessageTransformer |
getTransformer() |
List<MessageDispatch> |
getUnconsumedMessages() |
boolean |
hasUncomsumedMessages()
Checks whether the session has unconsumed messages.
|
boolean |
isAsyncDispatch() |
boolean |
isAutoAcknowledge()
Checks whether the session used auto acknowledgment.
|
protected boolean |
isClientAcknowledge()
Checks whether the session used client acknowledgment.
|
boolean |
isClosed()
Checks if the session is closed.
|
boolean |
isDupsOkAcknowledge()
Checks whether the session used dup ok acknowledgment.
|
boolean |
isIndividualAcknowledge() |
boolean |
isInUse(ActiveMQTempDestination destination) |
boolean |
isRunning() |
boolean |
isSessionAsyncDispatch() |
boolean |
isTransacted()
Checks whether the session uses transactions.
|
void |
recover()
Stops message delivery in this session, and restarts message delivery
with the oldest unacknowledged message.
|
void |
redispatch(ActiveMQDispatcher dispatcher,
MessageDispatchChannel unconsumedMessages) |
protected void |
removeConsumer(ActiveMQMessageConsumer consumer)
Remove the message consumer.
|
protected void |
removeProducer(ActiveMQMessageProducer producer)
Removes a message producer.
|
void |
rollback()
Rolls back any messages done in this transaction and releases any locks
currently held.
|
void |
run()
Optional operation, intended to be used only by Application Servers, not
by ordinary JMS clients.
|
protected void |
send(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 void |
sendAck(MessageAck ack) |
protected void |
sendAck(MessageAck ack,
boolean lazy) |
void |
setAsyncDispatch(boolean asyncDispatch) |
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
|
void |
setDeliveryListener(ActiveMQSession.DeliveryListener deliveryListener)
Sets the message delivery listener.
|
void |
setMessageListener(MessageListener listener)
Sets the session's distinguished message listener (optional).
|
protected void |
setOptimizeAcknowledge(boolean value) |
protected void |
setPrefetchSize(ConsumerId id,
int prefetch) |
void |
setSessionAsyncDispatch(boolean sessionAsyncDispatch) |
void |
setTransactionContext(TransactionContext transactionContext)
Sets the transaction context of the session.
|
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
|
protected void |
start()
Start this Session.
|
protected void |
stop()
Stops this session.
|
Response |
syncSendPacket(Command command)
Send the synchronus command.
|
String |
toString() |
void |
unsubscribe(String name)
Unsubscribes a durable subscription that has been created by a client.
|
public static final int INDIVIDUAL_ACKNOWLEDGE
public static final int MAX_ACK_CONSTANT
protected int acknowledgementMode
protected final ActiveMQConnection connection
protected final SessionInfo info
protected final LongSequenceGenerator consumerIdGenerator
protected final LongSequenceGenerator producerIdGenerator
protected final LongSequenceGenerator deliveryIdGenerator
protected final ActiveMQSessionExecutor executor
protected final AtomicBoolean started
protected final CopyOnWriteArrayList<ActiveMQMessageConsumer> consumers
protected final CopyOnWriteArrayList<ActiveMQMessageProducer> producers
protected boolean closed
protected boolean asyncDispatch
protected boolean sessionAsyncDispatch
protected final boolean debug
protected final Object redeliveryGuard
protected ActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch, boolean sessionAsyncDispatch) throws JMSException
connection - sessionId - acknowledgeMode - n.b if transacted - the acknowledgeMode ==
Session.SESSION_TRANSACTEDasyncDispatch - sessionAsyncDispatch - JMSException - on internal errorprotected ActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch) throws JMSException
JMSExceptionpublic void setTransactionContext(TransactionContext transactionContext)
transactionContext - - provides the means to control a JMS
transaction.public TransactionContext getTransactionContext()
public StatsImpl getStats()
getStats in interface StatsCapablepublic JMSSessionStatsImpl getSessionStats()
public BytesMessage createBytesMessage() throws JMSException
BytesMessage object. A BytesMessage
object is used to send a message containing a stream of uninterpreted
bytes.createBytesMessage in interface SessionJMSException - if the JMS provider fails to create this message due
to some internal error.public MapMessage createMapMessage() throws JMSException
MapMessage object. A MapMessage
object is used to send a self-defining set of name-value pairs, where
names are String objects and values are primitive values
in the Java programming language.createMapMessage in interface SessionJMSException - if the JMS provider fails to create this message due
to some internal error.public Message createMessage() throws JMSException
Message object. The Message
interface is the root interface of all JMS messages. A
Message object holds all the standard message header
information. It can be sent when a message containing only header
information is sufficient.createMessage in interface SessionJMSException - if the JMS provider fails to create this message due
to some internal error.public ObjectMessage createObjectMessage() throws JMSException
ObjectMessage object. An
ObjectMessage object is used to send a message that
contains a serializable Java object.createObjectMessage in interface SessionJMSException - if the JMS provider fails to create this message due
to some internal error.public ObjectMessage createObjectMessage(Serializable object) throws JMSException
ObjectMessage object. An
ObjectMessage object is used to send a message that
contains a serializable Java object.createObjectMessage in interface Sessionobject - the object to use to initialize this messageJMSException - if the JMS provider fails to create this message due
to some internal error.public StreamMessage createStreamMessage() throws JMSException
StreamMessage object. A
StreamMessage object is used to send a self-defining
stream of primitive values in the Java programming language.createStreamMessage in interface SessionJMSException - if the JMS provider fails to create this message due
to some internal error.public TextMessage createTextMessage() throws JMSException
TextMessage object. A TextMessage
object is used to send a message containing a String
object.createTextMessage in interface SessionJMSException - if the JMS provider fails to create this message due
to some internal error.public TextMessage createTextMessage(String text) throws JMSException
TextMessage object. A
TextMessage object is used to send a message containing a
String.createTextMessage in interface Sessiontext - the string used to initialize this messageJMSException - if the JMS provider fails to create this message due
to some internal error.public BlobMessage createBlobMessage(URL url) throws JMSException
BlobMessage object. A
BlobMessage object is used to send a message containing a
URL which points to some network addressible BLOB.url - the network addressable URL used to pass directly to the
consumerJMSException - if the JMS provider fails to create this message due
to some internal error.public BlobMessage createBlobMessage(URL url, boolean deletedByBroker) throws JMSException
BlobMessage object. A
BlobMessage object is used to send a message containing a
URL which points to some network addressible BLOB.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 acknowledgedJMSException - if the JMS provider fails to create this message due
to some internal error.public BlobMessage createBlobMessage(File file) throws JMSException
BlobMessage object. A
BlobMessage object is used to send a message containing
the File content. Before the message is sent the file
conent will be uploaded to the broker or some other remote repository
depending on the getBlobTransferPolicy().file - the file to be uploaded to some remote repo (or the broker)
depending on the strategyJMSException - if the JMS provider fails to create this message due
to some internal error.public BlobMessage createBlobMessage(InputStream in) throws JMSException
BlobMessage object. A
BlobMessage object is used to send a message containing
the File content. Before the message is sent the file
conent will be uploaded to the broker or some other remote repository
depending on the getBlobTransferPolicy().in - the stream to be uploaded to some remote repo (or the broker)
depending on the strategyJMSException - if the JMS provider fails to create this message due
to some internal error.public boolean getTransacted() throws JMSException
getTransacted in interface SessionJMSException - if there is some internal error.public int getAcknowledgeMode() throws JMSException
getAcknowledgeMode in interface SessionJMSExceptionConnection.createSession(boolean,int)public void commit() throws JMSException
commit in interface SessionJMSException - 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.public void rollback() throws JMSException
rollback in interface SessionJMSException - 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.public void close() throws JMSException
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 receive call or message
listener in progress has completed. A blocked message consumer
receive call returns null when this session
is closed.
Closing a transacted session must roll back the transaction in progress.
This method is the only Session method that can be called
concurrently.
Invoking any other Session method on a closed session must
throw a JMSException.IllegalStateException. Closing a
closed session must not throw an exception.
close in interface SessionJMSException - if the JMS provider fails to close the session due
to some internal error.public void dispose() throws JMSException
JMSExceptionprotected void configureMessage(ActiveMQMessage message) throws IllegalStateException
IllegalStateExceptionprotected void checkClosed() throws IllegalStateException
IllegalStateException - if the Session is closedpublic boolean isClosed()
public void recover() throws JMSException
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:
recover in interface SessionJMSException - 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.public MessageListener getMessageListener() throws JMSException
getMessageListener in interface SessionJMSException - if the JMS provider fails to get the message
listener due to an internal error.Session.setMessageListener(javax.jms.MessageListener),
ServerSessionPool,
ServerSessionpublic void setMessageListener(MessageListener listener) throws JMSException
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 IllegalStateException is
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.
setMessageListener in interface Sessionlistener - the message listener to associate with this sessionJMSException - if the JMS provider fails to set the message
listener due to an internal error.Session.getMessageListener(),
ServerSessionPool,
ServerSessionpublic void run()
run in interface Runnablerun in interface SessionServerSessionpublic MessageProducer createProducer(Destination destination) throws JMSException
MessageProducer to send messages to the
specified destination.
A client uses a MessageProducer object to send messages to
a destination. Since Queue and Topic both
inherit from Destination, they can be used in the
destination parameter to create a MessageProducer object.
createProducer in interface Sessiondestination - the Destination to send to, or null if
this is a producer which does not have a specified
destination.JMSException - if the session fails to create a MessageProducer due
to some internal error.InvalidDestinationException - if an invalid destination is
specified.public MessageConsumer createConsumer(Destination destination) throws JMSException
MessageConsumer for the specified destination.
Since Queue and Topic both inherit from
Destination, they can be used in the destination
parameter to create a MessageConsumer.createConsumer in interface Sessiondestination - the Destination to access.JMSException - if the session fails to create a consumer due to
some internal error.InvalidDestinationException - if an invalid destination is
specified.public MessageConsumer createConsumer(Destination destination, String messageSelector) throws JMSException
MessageConsumer for the specified destination,
using a message selector. Since Queue and
Topic both inherit from Destination, they
can be used in the destination parameter to create a
MessageConsumer.
A client uses a MessageConsumer object to receive messages
that have been sent to a destination.
createConsumer in interface Sessiondestination - the Destination to 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.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.public MessageConsumer createConsumer(Destination destination, MessageListener messageListener) throws JMSException
MessageConsumer for the specified destination.
Since Queue and Topic both inherit from
Destination, they can be used in the destination
parameter to create a MessageConsumer.destination - the Destination to access.messageListener - the listener to use for async consumption of messagesJMSException - if the session fails to create a consumer due to
some internal error.InvalidDestinationException - if an invalid destination is
specified.public MessageConsumer createConsumer(Destination destination, String messageSelector, MessageListener messageListener) throws JMSException
MessageConsumer for the specified destination,
using a message selector. Since Queue and
Topic both inherit from Destination, they
can be used in the destination parameter to create a
MessageConsumer.
A client uses a MessageConsumer object to receive messages
that have been sent to a destination.
destination - the Destination to 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 messagesJMSException - 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.public MessageConsumer createConsumer(Destination destination, String messageSelector, boolean noLocal) throws JMSException
MessageConsumer for 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 Queue and Topic both inherit from
Destination, they can be used in the destination
parameter to create a MessageConsumer.
A client uses a MessageConsumer object 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 NoLocal attribute allows a consumer to
inhibit the delivery of messages published by its own connection. The
default value for this attribute is False. The noLocal
value must be supported by destinations that are topics.
createConsumer in interface Sessiondestination - the Destination to 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 for NoLocal is not specified if
the destination is a queue.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.public MessageConsumer createConsumer(Destination destination, String messageSelector, boolean noLocal, MessageListener messageListener) throws JMSException
MessageConsumer for 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 Queue and Topic both inherit from
Destination, they can be used in the destination
parameter to create a MessageConsumer.
A client uses a MessageConsumer object 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 NoLocal attribute allows a consumer to
inhibit the delivery of messages published by its own connection. The
default value for this attribute is False. The noLocal
value must be supported by destinations that are topics.
destination - the Destination to 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 for NoLocal is not specified if
the destination is a queue.messageListener - the listener to use for async consumption of messagesJMSException - 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.public Queue createQueue(String queueName) throws JMSException
Queue name.
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 createTemporaryQueue
method.
createQueue in interface QueueSessioncreateQueue in interface SessionqueueName - the name of this QueueQueue with the given nameJMSException - if the session fails to create a queue due to some
internal error.public Topic createTopic(String topicName) throws JMSException
Topic name.
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 createTemporaryTopic
method.
createTopic in interface SessioncreateTopic in interface TopicSessiontopicName - the name of this TopicTopic with the given nameJMSException - if the session fails to create a topic due to some
internal error.public TopicSubscriber createDurableSubscriber(Topic topic, String name) throws JMSException
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
TopicSubscriber for a particular durable subscription.
A client can change an existing durable subscription by creating a
durable TopicSubscriber with 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 NoLocal attribute allows a subscriber to
inhibit the delivery of messages published by its own connection. The
default value for this attribute is false.
createDurableSubscriber in interface SessioncreateDurableSubscriber in interface TopicSessiontopic - the non-temporary Topic to subscribe toname - the name used to identify this subscriptionJMSException - if the session fails to create a subscriber due to
some internal error.InvalidDestinationException - if an invalid topic is specified.public TopicSubscriber createDurableSubscriber(Topic topic, String name, String messageSelector, boolean noLocal) throws JMSException
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
TopicSubscriber for 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 TopicSubscriber with 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.
createDurableSubscriber in interface SessioncreateDurableSubscriber in interface TopicSessiontopic - the non-temporary Topic to 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 connectionJMSException - 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.public QueueBrowser createBrowser(Queue queue) throws JMSException
QueueBrowser object to peek at the messages on
the specified queue.createBrowser in interface QueueSessioncreateBrowser in interface Sessionqueue - the queue to accessJMSException - if the session fails to create a browser due to some
internal error.InvalidDestinationException - if an invalid destination is
specifiedpublic QueueBrowser createBrowser(Queue queue, String messageSelector) throws JMSException
QueueBrowser object to peek at the messages on
the specified queue using a message selector.createBrowser in interface QueueSessioncreateBrowser in interface Sessionqueue - the queue to 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.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.public TemporaryQueue createTemporaryQueue() throws JMSException
TemporaryQueue object. Its lifetime will be that
of the Connection unless it is deleted earlier.createTemporaryQueue in interface QueueSessioncreateTemporaryQueue in interface SessionJMSException - if the session fails to create a temporary queue due
to some internal error.public TemporaryTopic createTemporaryTopic() throws JMSException
TemporaryTopic object. Its lifetime will be that
of the Connection unless it is deleted earlier.createTemporaryTopic in interface SessioncreateTemporaryTopic in interface TopicSessionJMSException - if the session fails to create a temporary topic due
to some internal error.public QueueReceiver createReceiver(Queue queue) throws JMSException
QueueReceiver object to receive messages from
the specified queue.createReceiver in interface QueueSessionqueue - the Queue to accessJMSException - if the session fails to create a receiver due to
some internal error.JMSExceptionInvalidDestinationException - if an invalid queue is specified.public QueueReceiver createReceiver(Queue queue, String messageSelector) throws JMSException
QueueReceiver object to receive messages from
the specified queue using a message selector.createReceiver in interface QueueSessionqueue - the Queue to 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.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.public QueueSender createSender(Queue queue) throws JMSException
QueueSender object to send messages to the
specified queue.createSender in interface QueueSessionqueue - the Queue to access, or null if this is an
unidentified producerJMSException - if the session fails to create a sender due to some
internal error.InvalidDestinationException - if an invalid queue is specified.public TopicSubscriber createSubscriber(Topic topic) throws JMSException
A client uses a TopicSubscriber object to receive messages
that have been published to a topic.
Regular TopicSubscriber objects 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 NoLocal attribute allows a subscriber to
inhibit the delivery of messages published by its own connection. The
default value for this attribute is false.
createSubscriber in interface TopicSessiontopic - the Topic to subscribe toJMSException - if the session fails to create a subscriber due to
some internal error.InvalidDestinationException - if an invalid topic is specified.public TopicSubscriber createSubscriber(Topic topic, String messageSelector, boolean noLocal) throws JMSException
A client uses a TopicSubscriber object to receive messages
that have been published to a topic.
Regular TopicSubscriber objects 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 NoLocal attribute allows a subscriber to
inhibit the delivery of messages published by its own connection. The
default value for this attribute is false.
createSubscriber in interface TopicSessiontopic - the Topic to 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 connectionJMSException - 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.public TopicPublisher createPublisher(Topic topic) throws JMSException
A client uses a TopicPublisher object to publish messages
on a topic. Each time a client creates a TopicPublisher on
a topic, it defines a new sequence of messages that have no ordering
relationship with the messages it has previously sent.
createPublisher in interface TopicSessiontopic - the Topic to publish to, or null if this is
an unidentified producerJMSException - if the session fails to create a publisher due to
some internal error.InvalidDestinationException - if an invalid topic is specified.public void unsubscribe(String name) throws JMSException
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 MessageConsumer or
TopicSubscriber for the subscription, or while a consumed
message is part of a pending transaction or has not been acknowledged in
the session.
unsubscribe in interface Sessionunsubscribe in interface TopicSessionname - the name used to identify this subscriptionJMSException - if the session fails to unsubscribe to the durable
subscription due to some internal error.InvalidDestinationException - if an invalid subscription name is
specified.public void dispatch(MessageDispatch messageDispatch)
dispatch in interface ActiveMQDispatcherpublic void acknowledge() throws JMSException
All consumed JMS messages support the acknowledge method
for use when a client has specified that its JMS session's consumed
messages are to be explicitly acknowledged. By invoking
acknowledge on a consumed message, a client acknowledges
all messages consumed by the session that the message was delivered to.
Calls to acknowledge are 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.
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.Session.CLIENT_ACKNOWLEDGEprotected void addConsumer(ActiveMQMessageConsumer consumer) throws JMSException
consumer - - message consumer.JMSExceptionprotected void removeConsumer(ActiveMQMessageConsumer consumer)
consumer - - consumer to be removed.JMSExceptionprotected void addProducer(ActiveMQMessageProducer producer) throws JMSException
producer - - message producer to be added.JMSExceptionprotected void removeProducer(ActiveMQMessageProducer producer)
producer - - message producer to be removed.JMSExceptionprotected void start() throws JMSException
JMSExceptionprotected void stop() throws JMSException
JMSExceptionprotected SessionId getSessionId()
protected ConsumerId getNextConsumerId()
protected ProducerId getNextProducerId()
protected void send(ActiveMQMessageProducer producer, ActiveMQDestination destination, Message message, int deliveryMode, int priority, long timeToLive, MemoryUsage producerWindow, int sendTimeout, AsyncCallback onComplete) throws JMSException
producer - - message producer.destination - - message destination.message - - message to be sent.deliveryMode - - JMS messsage delivery mode.priority - - message priority.timeToLive - - message expiration.producerWindow - onComplete - JMSExceptionprotected void doStartTransaction() throws JMSException
JMSException - if some internal error occurspublic boolean hasUncomsumedMessages()
public boolean isTransacted()
protected boolean isClientAcknowledge()
public boolean isAutoAcknowledge()
public boolean isDupsOkAcknowledge()
public boolean isIndividualAcknowledge()
public ActiveMQSession.DeliveryListener getDeliveryListener()
public void setDeliveryListener(ActiveMQSession.DeliveryListener deliveryListener)
deliveryListener - - message delivery listener.protected SessionInfo getSessionInfo() throws JMSException
JMSExceptionpublic void asyncSendPacket(Command command) throws JMSException
command - - command to be executed.JMSExceptionpublic Response syncSendPacket(Command command) throws JMSException
command - - command to be executed.JMSExceptionpublic long getNextDeliveryId()
public void redispatch(ActiveMQDispatcher dispatcher, MessageDispatchChannel unconsumedMessages) throws JMSException
JMSExceptionpublic boolean isRunning()
public boolean isAsyncDispatch()
public void setAsyncDispatch(boolean asyncDispatch)
public boolean isSessionAsyncDispatch()
public void setSessionAsyncDispatch(boolean sessionAsyncDispatch)
sessionAsyncDispatch - The sessionAsyncDispatch to set.public MessageTransformer getTransformer()
public ActiveMQConnection getConnection()
public void setTransformer(MessageTransformer transformer)
public BlobTransferPolicy getBlobTransferPolicy()
public void setBlobTransferPolicy(BlobTransferPolicy blobTransferPolicy)
public List<MessageDispatch> getUnconsumedMessages()
public void checkMessageListener() throws JMSException
JMSExceptionprotected void setOptimizeAcknowledge(boolean value)
protected void setPrefetchSize(ConsumerId id, int prefetch)
protected void close(ConsumerId id)
public boolean isInUse(ActiveMQTempDestination destination)
public long getLastDeliveredSequenceId()
protected void sendAck(MessageAck ack) throws JMSException
JMSExceptionprotected void sendAck(MessageAck ack, boolean lazy) throws JMSException
JMSExceptionprotected Scheduler getScheduler() throws JMSException
JMSExceptionprotected ThreadPoolExecutor getConnectionExecutor()
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