org.apache.activemq.ActiveMQSession Maven / Gradle / Ivy
/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq;
import java.io.Serializable;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import javax.jms.BytesMessage;
import javax.jms.Destination;
import javax.jms.IllegalStateException;
import javax.jms.InvalidDestinationException;
import javax.jms.InvalidSelectorException;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.ObjectMessage;
import javax.jms.Queue;
import javax.jms.QueueBrowser;
import javax.jms.QueueReceiver;
import javax.jms.QueueSender;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.StreamMessage;
import javax.jms.TemporaryQueue;
import javax.jms.TemporaryTopic;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;
import javax.jms.TopicSubscriber;
import javax.jms.TransactionRolledBackException;
import org.apache.activemq.command.ActiveMQBytesMessage;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQMapMessage;
import org.apache.activemq.command.ActiveMQMessage;
import org.apache.activemq.command.ActiveMQObjectMessage;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQStreamMessage;
import org.apache.activemq.command.ActiveMQTempDestination;
import org.apache.activemq.command.ActiveMQTextMessage;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.command.Command;
import org.apache.activemq.command.ConsumerId;
import org.apache.activemq.command.MessageAck;
import org.apache.activemq.command.MessageDispatch;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.command.ProducerId;
import org.apache.activemq.command.Response;
import org.apache.activemq.command.SessionId;
import org.apache.activemq.command.SessionInfo;
import org.apache.activemq.command.TransactionId;
import org.apache.activemq.management.JMSSessionStatsImpl;
import org.apache.activemq.management.StatsCapable;
import org.apache.activemq.management.StatsImpl;
import org.apache.activemq.thread.Scheduler;
import org.apache.activemq.transaction.Synchronization;
import org.apache.activemq.util.Callback;
import org.apache.activemq.util.LongSequenceGenerator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import edu.emory.mathcs.backport.java.util.concurrent.CopyOnWriteArrayList;
import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicBoolean;
/**
*
* 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:
*
* - It is a factory for its message producers and consumers.
*
- It supplies provider-optimized message factories.
*
- It is a factory for
TemporaryTopics and TemporaryQueues.
* - It provides a way to create
Queue or Topic
* objects 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 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.
*
* @version $Revision: 1.34 $
* @see javax.jms.Session
* @see javax.jms.QueueSession
* @see javax.jms.TopicSession
* @see javax.jms.XASession
*/
public class ActiveMQSession implements Session, QueueSession, TopicSession, StatsCapable, ActiveMQDispatcher {
public static interface DeliveryListener {
public void beforeDelivery(ActiveMQSession session, Message msg);
public void afterDelivery(ActiveMQSession session, Message msg);
}
private static final Log log = LogFactory.getLog(ActiveMQSession.class);
protected int acknowledgementMode;
private MessageListener messageListener;
private JMSSessionStatsImpl stats;
private TransactionContext transactionContext;
private DeliveryListener deliveryListener;
protected final ActiveMQConnection connection;
protected final SessionInfo info;
protected final LongSequenceGenerator consumerIdGenerator = new LongSequenceGenerator();
protected final LongSequenceGenerator producerIdGenerator = new LongSequenceGenerator();
protected final LongSequenceGenerator deliveryIdGenerator = new LongSequenceGenerator();
protected final ActiveMQSessionExecutor executor = new ActiveMQSessionExecutor(this);
protected final AtomicBoolean started = new AtomicBoolean(false);
protected final CopyOnWriteArrayList consumers = new CopyOnWriteArrayList();
protected final CopyOnWriteArrayList producers = new CopyOnWriteArrayList();
protected boolean closed;
protected boolean asyncDispatch;
protected boolean sessionAsyncDispatch;
/**
* Construct the Session
*
* @param connection
* @param sessionId
* @param acknowledgeMode
* n.b if transacted - the acknowledgeMode ==
* Session.SESSION_TRANSACTED
* @param asyncDispatch
* @param sessionAsyncDispatch
* @throws JMSException
* on internal error
*/
protected ActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch,boolean sessionAsyncDispatch)
throws JMSException {
this.connection = connection;
this.acknowledgementMode = acknowledgeMode;
this.asyncDispatch=asyncDispatch;
this.sessionAsyncDispatch = sessionAsyncDispatch;
this.info = new SessionInfo(connection.getConnectionInfo(), sessionId.getValue());
setTransactionContext(new TransactionContext(connection));
connection.addSession(this);
stats = new JMSSessionStatsImpl(producers, consumers);
this.connection.asyncSendPacket(info);
if( connection.isStarted() )
start();
}
protected ActiveMQSession(ActiveMQConnection connection, SessionId sessionId, int acknowledgeMode, boolean asyncDispatch)throws JMSException {
this(connection,sessionId,acknowledgeMode,asyncDispatch,true);
}
/**
* Sets the transaction context of the session.
*
* @param transactionContext -
* provides the means to control a JMS transaction.
*/
public void setTransactionContext(TransactionContext transactionContext) {
this.transactionContext = transactionContext;
}
/**
* Returns the transaction context of the session.
*
* @return transactionContext - session's transaction context.
*/
public TransactionContext getTransactionContext() {
return transactionContext;
}
/*
* (non-Javadoc)
*
* @see org.apache.activemq.management.StatsCapable#getStats()
*/
public StatsImpl getStats() {
return stats;
}
/**
* Returns the session's statistics.
*
* @return stats - session's statistics.
*/
public JMSSessionStatsImpl getSessionStats() {
return stats;
}
/**
* Creates a BytesMessage object. A BytesMessage
* object is used to send a message containing a stream of uninterpreted
* bytes.
*
* @return the an ActiveMQBytesMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public BytesMessage createBytesMessage() throws JMSException {
checkClosed();
ActiveMQBytesMessage message = new ActiveMQBytesMessage();
message.setConnection(connection);
return message;
}
/**
* Creates a 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.
*
* @return an ActiveMQMapMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public MapMessage createMapMessage() throws JMSException {
checkClosed();
ActiveMQMapMessage message = new ActiveMQMapMessage();
message.setConnection(connection);
return message;
}
/**
* Creates a 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.
*
* @return an ActiveMQMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public Message createMessage() throws JMSException {
checkClosed();
ActiveMQMessage message = new ActiveMQMessage();
message.setConnection(connection);
return message;
}
/**
* Creates an ObjectMessage object. An ObjectMessage
* object is used to send a message that contains a serializable Java
* object.
*
* @return an ActiveMQObjectMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public ObjectMessage createObjectMessage() throws JMSException {
checkClosed();
ActiveMQObjectMessage message = new ActiveMQObjectMessage();
message.setConnection(connection);
return message;
}
/**
* Creates an initialized ObjectMessage object. An ObjectMessage
* object is used to send a message that contains a serializable Java
* object.
*
* @param object
* the object to use to initialize this message
* @return an ActiveMQObjectMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public ObjectMessage createObjectMessage(Serializable object) throws JMSException {
checkClosed();
ActiveMQObjectMessage message = new ActiveMQObjectMessage();
message.setConnection(connection);
message.setObject(object);
return message;
}
/**
* Creates a StreamMessage object. A StreamMessage
* object is used to send a self-defining stream of primitive values in the
* Java programming language.
*
* @return an ActiveMQStreamMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public StreamMessage createStreamMessage() throws JMSException {
checkClosed();
ActiveMQStreamMessage message = new ActiveMQStreamMessage();
message.setConnection(connection);
return message;
}
/**
* Creates a TextMessage object. A TextMessage
* object is used to send a message containing a String
* object.
*
* @return an ActiveMQTextMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public TextMessage createTextMessage() throws JMSException {
checkClosed();
ActiveMQTextMessage message = new ActiveMQTextMessage();
message.setConnection(connection);
return message;
}
/**
* Creates an initialized TextMessage object. A TextMessage
* object is used to send a message containing a String.
*
* @param text
* the string used to initialize this message
* @return an ActiveMQTextMessage
* @throws JMSException
* if the JMS provider fails to create this message due to some
* internal error.
*/
public TextMessage createTextMessage(String text) throws JMSException {
checkClosed();
ActiveMQTextMessage message = new ActiveMQTextMessage();
message.setText(text);
message.setConnection(connection);
return message;
}
/**
* Indicates whether the session is in transacted mode.
*
* @return true if the session is in transacted mode
* @throws JMSException
* if there is some internal error.
*/
public boolean getTransacted() throws JMSException {
checkClosed();
return ((acknowledgementMode == Session.SESSION_TRANSACTED) || (transactionContext.isInXATransaction()));
}
/**
* Returns 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.
*
* @return If the session is not transacted, returns the current
* acknowledgement mode for the session. If the session is
* transacted, returns SESSION_TRANSACTED.
* @throws JMSException
* @see javax.jms.Connection#createSession(boolean,int)
* @since 1.1 exception JMSException if there is some internal error.
*/
public int getAcknowledgeMode() throws JMSException {
checkClosed();
return this.acknowledgementMode;
}
/**
* Commits all messages done in this transaction and releases any locks
* currently held.
*
* @throws JMSException
* if the JMS provider fails to commit the transaction due to
* some internal error.
* @throws TransactionRolledBackException
* if the transaction is rolled back due to some internal error
* during commit.
* @throws javax.jms.IllegalStateException
* if the method is not called by a transacted session.
*/
public void commit() throws JMSException {
checkClosed();
if (!getTransacted()) {
throw new javax.jms.IllegalStateException("Not a transacted session");
}
transactionContext.commit();
}
/**
* Rolls back any messages done in this transaction and releases any locks
* currently held.
*
* @throws JMSException
* if the JMS provider fails to roll back the transaction due to
* some internal error.
* @throws javax.jms.IllegalStateException
* if the method is not called by a transacted session.
*/
public void rollback() throws JMSException {
checkClosed();
if (!getTransacted()) {
throw new javax.jms.IllegalStateException("Not a transacted session");
}
transactionContext.rollback();
}
/**
* Closes 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 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.
*
* @throws JMSException
* if the JMS provider fails to close the session due to some
* internal error.
*/
public void close() throws JMSException {
if (!closed) {
dispose();
connection.asyncSendPacket(info.createRemoveCommand());
}
}
void clearMessagesInProgress(){
executor.clearMessagesInProgress();
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer consumer = (ActiveMQMessageConsumer) iter.next();
consumer.clearMessagesInProgress();
}
}
void deliverAcks(){
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer consumer = (ActiveMQMessageConsumer) iter.next();
consumer.deliverAcks();
}
}
synchronized public void dispose() throws JMSException {
if (!closed) {
try {
executor.stop();
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer consumer = (ActiveMQMessageConsumer) iter.next();
consumer.dispose();
}
consumers.clear();
for (Iterator iter = producers.iterator(); iter.hasNext();) {
ActiveMQMessageProducer producer = (ActiveMQMessageProducer) iter.next();
producer.dispose();
}
producers.clear();
try {
if (getTransactionContext().isInLocalTransaction()) {
rollback();
}
}
catch (JMSException e) {
}
}
finally {
connection.removeSession(this);
this.transactionContext = null;
closed = true;
}
}
}
/**
* Check 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
*/
protected void checkClosed() throws IllegalStateException {
if (closed) {
throw new IllegalStateException("The Session is closed");
}
}
/**
* Stops 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.
*
*
* @throws JMSException
* if the JMS provider fails to stop and restart message
* delivery due to some internal error.
* @throws IllegalStateException
* if the method is called by a transacted session.
*/
public void recover() throws JMSException {
checkClosed();
if (getTransacted()) {
throw new IllegalStateException("This session is transacted");
}
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer c = (ActiveMQMessageConsumer) iter.next();
c.rollback();
}
}
/**
* Returns the session's distinguished message listener (optional).
*
* @return 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 javax.jms.Session#setMessageListener(javax.jms.MessageListener)
* @see javax.jms.ServerSessionPool
* @see javax.jms.ServerSession
*/
public MessageListener getMessageListener() throws JMSException {
checkClosed();
return this.messageListener;
}
/**
* 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.
*
* This is an expert facility not used by regular JMS clients.
*
* @param 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 javax.jms.Session#getMessageListener()
* @see javax.jms.ServerSessionPool
* @see javax.jms.ServerSession
*/
public void setMessageListener(MessageListener listener) throws JMSException {
checkClosed();
this.messageListener = listener;
if (listener != null) {
executor.setDispatchedBySessionPool(true);
}
}
/**
* Optional operation, intended to be used only by Application Servers, not
* by ordinary JMS clients.
*
* @see javax.jms.ServerSession
*/
public void run() {
MessageDispatch messageDispatch;
while ((messageDispatch = executor.dequeueNoWait()) != null) {
final MessageDispatch md = messageDispatch;
ActiveMQMessage message = (ActiveMQMessage)md.getMessage();
if( message.isExpired() ) {
//TODO: Ack it without delivery to client
continue;
}
if( isClientAcknowledge() ) {
message.setAcknowledgeCallback(new Callback() {
public void execute() throws Exception {
}
});
}
if (deliveryListener != null) {
deliveryListener.beforeDelivery(this, message);
}
md.setDeliverySequenceId(getNextDeliveryId());
try {
messageListener.onMessage(message);
} catch ( Throwable e ) {
// TODO: figure out proper way to handle error.
log.error("error dispatching message: ",e);
connection.onAsyncException(e);
}
try {
MessageAck ack = new MessageAck(md,MessageAck.STANDARD_ACK_TYPE,1);
ack.setFirstMessageId(md.getMessage().getMessageId());
doStartTransaction();
ack.setTransactionId(getTransactionContext().getTransactionId());
if( ack.getTransactionId()!=null ) {
getTransactionContext().addSynchronization(new Synchronization(){
public void afterRollback() throws Exception {
md.getMessage().onMessageRolledBack();
RedeliveryPolicy redeliveryPolicy = connection.getRedeliveryPolicy();
int redeliveryCounter = md.getMessage().getRedeliveryCounter();
if (redeliveryPolicy.getMaximumRedeliveries() != RedeliveryPolicy.NO_MAXIMUM_REDELIVERIES
&& redeliveryCounter > redeliveryPolicy.getMaximumRedeliveries()) {
// We need to NACK the messages so that they get sent to the
// DLQ.
// Acknowledge the last message.
MessageAck ack = new MessageAck(md,MessageAck.POSION_ACK_TYPE,1);
ack.setFirstMessageId(md.getMessage().getMessageId());
asyncSendPacket(ack);
} else {
// Figure out how long we should wait to resend this message.
long redeliveryDelay=0;
for( int i=0; i < redeliveryCounter; i++) {
redeliveryDelay = redeliveryPolicy.getRedeliveryDelay(redeliveryDelay);
}
Scheduler.executeAfterDelay(new Runnable() {
public void run() {
((ActiveMQDispatcher)md.getConsumer()).dispatch(md);
}
}, redeliveryDelay);
}
}
});
}
asyncSendPacket(ack);
} catch ( Throwable e ) {
connection.onAsyncException(e);
}
if (deliveryListener != null) {
deliveryListener.afterDelivery(this, message);
}
}
}
/**
* Creates a 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.
*
* @param destination
* the Destination to send to, or null if this is
* a producer which does not have a specified destination.
* @return the MessageProducer
* @throws JMSException
* if the session fails to create a MessageProducer due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid destination is specified.
* @since 1.1
*/
public MessageProducer createProducer(Destination destination) throws JMSException {
checkClosed();
return new ActiveMQMessageProducer(this, getNextProducerId(), ActiveMQMessageTransformation
.transformDestination(destination));
}
/**
* Creates a 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.
*
* @param destination
* the Destination to access.
* @return the MessageConsumer
* @throws JMSException
* if the session fails to create a consumer due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid destination is specified.
* @since 1.1
*/
public MessageConsumer createConsumer(Destination destination) throws JMSException {
checkClosed();
return createConsumer(destination, null);
}
/**
* Creates a 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.
*
* @param destination
* the Destination to access
* @param messageSelector
* only messages with properties matching the message selector
* expression are delivered. A value of null or an empty string
* indicates that there is no message selector for the message
* consumer.
* @return the MessageConsumer
* @throws JMSException
* if the session fails to create a MessageConsumer due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid destination is specified.
* @throws InvalidSelectorException
* if the message selector is invalid.
* @since 1.1
*/
public MessageConsumer createConsumer(Destination destination, String messageSelector) throws JMSException {
checkClosed();
int prefetch = 0;
ActiveMQPrefetchPolicy prefetchPolicy = connection.getPrefetchPolicy();
if (destination instanceof Topic) {
prefetch = prefetchPolicy.getTopicPrefetch();
} else {
prefetch = prefetchPolicy.getQueuePrefetch();
}
return new ActiveMQMessageConsumer(this, getNextConsumerId(),
ActiveMQMessageTransformation.transformDestination(destination), null, messageSelector, prefetch,
prefetchPolicy.getMaximumPendingMessageLimit(), false, false, asyncDispatch);
}
/**
* @return
*/
protected ConsumerId getNextConsumerId() {
return new ConsumerId(info.getSessionId(), consumerIdGenerator.getNextSequenceId());
}
/**
* @return
*/
protected ProducerId getNextProducerId() {
return new ProducerId(info.getSessionId(), producerIdGenerator.getNextSequenceId());
}
/**
* Creates 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.
*
* @param destination
* the Destination to access
* @param messageSelector
* only messages with properties matching the message selector
* expression are delivered. A value of null or an empty string
* indicates that there is no message selector for the message
* consumer.
* @param 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.
* @return the MessageConsumer
* @throws JMSException
* if the session fails to create a MessageConsumer due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid destination is specified.
* @throws InvalidSelectorException
* if the message selector is invalid.
* @since 1.1
*/
public MessageConsumer createConsumer(Destination destination, String messageSelector, boolean NoLocal)
throws JMSException {
checkClosed();
ActiveMQPrefetchPolicy prefetchPolicy = connection.getPrefetchPolicy();
return new ActiveMQMessageConsumer(this, getNextConsumerId(),
ActiveMQMessageTransformation.transformDestination(destination), null, messageSelector,
prefetchPolicy.getTopicPrefetch(), prefetchPolicy.getMaximumPendingMessageLimit(), NoLocal, false, asyncDispatch);
}
/**
* Creates a queue identity given a 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.
*
* @param queueName
* the name of this Queue
* @return a Queue with the given name
* @throws JMSException
* if the session fails to create a queue due to some internal
* error.
* @since 1.1
*/
public Queue createQueue(String queueName) throws JMSException {
checkClosed();
return new ActiveMQQueue(queueName);
}
/**
* Creates a topic identity given a 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.
*
* @param topicName
* the name of this Topic
* @return a Topic with the given name
* @throws JMSException
* if the session fails to create a topic due to some internal
* error.
* @since 1.1
*/
public Topic createTopic(String topicName) throws JMSException {
checkClosed();
return new ActiveMQTopic(topicName);
}
/**
* Creates a QueueBrowser object to peek at the messages on
* the specified queue.
*
* @param queue
* the queue to access
* @exception InvalidDestinationException
* if an invalid destination is specified
* @since 1.1
*/
/**
* 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 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.
*
* @param topic
* the non-temporary Topic to subscribe to
* @param name
* the name used to identify this subscription
* @return the TopicSubscriber
* @throws JMSException
* if the session fails to create a subscriber due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid topic is specified.
* @since 1.1
*/
public TopicSubscriber createDurableSubscriber(Topic topic, String name) throws JMSException {
checkClosed();
return createDurableSubscriber(topic, name, null, false);
}
/**
* 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 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.
*
* @param topic
* the non-temporary Topic to subscribe to
* @param name
* the name used to identify this subscription
* @param messageSelector
* only messages with properties matching the message selector
* expression are delivered. A value of null or an empty string
* indicates that there is no message selector for the message
* consumer.
* @param noLocal
* if set, inhibits the delivery of messages published by its own
* connection
* @return the Queue Browser
* @throws JMSException
* if the session fails to create a subscriber due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid topic is specified.
* @throws InvalidSelectorException
* if the message selector is invalid.
* @since 1.1
*/
public TopicSubscriber createDurableSubscriber(Topic topic,String name,String messageSelector,boolean noLocal)
throws JMSException{
checkClosed();
connection.checkClientIDWasManuallySpecified();
ActiveMQPrefetchPolicy prefetchPolicy=this.connection.getPrefetchPolicy();
int prefetch=isAutoAcknowledge()&&connection.isOptimizedMessageDispatch()?prefetchPolicy
.getOptimizeDurableTopicPrefetch():prefetchPolicy.getDurableTopicPrefetch();
int maxPrendingLimit=prefetchPolicy.getMaximumPendingMessageLimit();
return new ActiveMQTopicSubscriber(this,getNextConsumerId(),ActiveMQMessageTransformation
.transformDestination(topic),name,messageSelector,prefetch,maxPrendingLimit,noLocal,false,
asyncDispatch);
}
/**
* Creates a QueueBrowser object to peek at the messages on
* the specified queue.
*
* @param queue
* the queue to access
* @return the Queue Browser
* @throws JMSException
* if the session fails to create a browser due to some internal
* error.
* @throws InvalidDestinationException
* if an invalid destination is specified
* @since 1.1
*/
public QueueBrowser createBrowser(Queue queue) throws JMSException {
checkClosed();
return createBrowser(queue, null);
}
/**
* Creates a QueueBrowser object to peek at the messages on
* the specified queue using a message selector.
*
* @param queue
* the queue to access
* @param messageSelector
* only messages with properties matching the message selector
* expression are delivered. A value of null or an empty string
* indicates that there is no message selector for the message
* consumer.
* @return the Queue Browser
* @throws JMSException
* if the session fails to create a browser due to some internal
* error.
* @throws InvalidDestinationException
* if an invalid destination is specified
* @throws InvalidSelectorException
* if the message selector is invalid.
* @since 1.1
*/
public QueueBrowser createBrowser(Queue queue, String messageSelector) throws JMSException {
checkClosed();
return new ActiveMQQueueBrowser(this, getNextConsumerId(), ActiveMQMessageTransformation
.transformDestination(queue), messageSelector, asyncDispatch);
}
/**
* Creates a TemporaryQueue object. Its lifetime will be that
* of the Connection unless it is deleted earlier.
*
* @return a temporary queue identity
* @throws JMSException
* if the session fails to create a temporary queue due to some
* internal error.
* @since 1.1
*/
public TemporaryQueue createTemporaryQueue() throws JMSException {
checkClosed();
return (TemporaryQueue) connection.createTempDestination(false);
}
/**
* Creates a TemporaryTopic object. Its lifetime will be that
* of the Connection unless it is deleted earlier.
*
* @return a temporary topic identity
* @throws JMSException
* if the session fails to create a temporary topic due to some
* internal error.
* @since 1.1
*/
public TemporaryTopic createTemporaryTopic() throws JMSException {
checkClosed();
return (TemporaryTopic)connection.createTempDestination(true);
}
/**
* Creates a QueueReceiver object to receive messages from
* the specified queue.
*
* @param queue
* the Queue to access
* @return
* @throws JMSException
* if the session fails to create a receiver due to some
* internal error.
* @throws JMSException
* @throws InvalidDestinationException
* if an invalid queue is specified.
*/
public QueueReceiver createReceiver(Queue queue) throws JMSException {
checkClosed();
return createReceiver(queue, null);
}
/**
* Creates a QueueReceiver object to receive messages from
* the specified queue using a message selector.
*
* @param queue
* the Queue to access
* @param messageSelector
* only messages with properties matching the message selector
* expression are delivered. A value of null or an empty string
* indicates that there is no message selector for the message
* consumer.
* @return QueueReceiver
* @throws JMSException
* if the session fails to create a receiver due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid queue is specified.
* @throws InvalidSelectorException
* if the message selector is invalid.
*/
public QueueReceiver createReceiver(Queue queue, String messageSelector) throws JMSException {
checkClosed();
ActiveMQPrefetchPolicy prefetchPolicy = this.connection.getPrefetchPolicy();
return new ActiveMQQueueReceiver(this, getNextConsumerId(), ActiveMQMessageTransformation
.transformDestination(queue), messageSelector, prefetchPolicy.getQueuePrefetch(),
prefetchPolicy.getMaximumPendingMessageLimit(), asyncDispatch);
}
/**
* Creates a QueueSender object to send messages to the
* specified queue.
*
* @param queue
* the Queue to access, or null if this is an
* unidentified producer
* @return QueueSender
* @throws JMSException
* if the session fails to create a sender due to some internal
* error.
* @throws InvalidDestinationException
* if an invalid queue is specified.
*/
public QueueSender createSender(Queue queue) throws JMSException {
checkClosed();
return new ActiveMQQueueSender(this, ActiveMQMessageTransformation.transformDestination(queue));
}
/**
* Creates a nondurable subscriber to the specified topic.
*
* 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.
*
* @param topic
* the Topic to subscribe to
* @return TopicSubscriber
* @throws JMSException
* if the session fails to create a subscriber due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid topic is specified.
*/
public TopicSubscriber createSubscriber(Topic topic) throws JMSException {
checkClosed();
return createSubscriber(topic, null, false);
}
/**
* 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 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.
*
* @param topic
* the Topic to subscribe to
* @param messageSelector
* only messages with properties matching the message selector
* expression are delivered. A value of null or an empty string
* indicates that there is no message selector for the message
* consumer.
* @param noLocal
* if set, inhibits the delivery of messages published by its own
* connection
* @return TopicSubscriber
* @throws JMSException
* if the session fails to create a subscriber due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid topic is specified.
* @throws InvalidSelectorException
* if the message selector is invalid.
*/
public TopicSubscriber createSubscriber(Topic topic, String messageSelector, boolean noLocal) throws JMSException {
checkClosed();
ActiveMQPrefetchPolicy prefetchPolicy = this.connection.getPrefetchPolicy();
return new ActiveMQTopicSubscriber(this, getNextConsumerId(), ActiveMQMessageTransformation
.transformDestination(topic), null, messageSelector, prefetchPolicy.getTopicPrefetch(),
prefetchPolicy.getMaximumPendingMessageLimit(), noLocal, false, asyncDispatch);
}
/**
* Creates a publisher for the specified topic.
*
* 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.
*
* @param topic
* the Topic to publish to, or null if this is an
* unidentified producer
* @return TopicPublisher
* @throws JMSException
* if the session fails to create a publisher due to some
* internal error.
* @throws InvalidDestinationException
* if an invalid topic is specified.
*/
public TopicPublisher createPublisher(Topic topic) throws JMSException {
checkClosed();
return new ActiveMQTopicPublisher(this, ActiveMQMessageTransformation.transformDestination(topic));
}
/**
* 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 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.
*
* @param 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.
* @throws InvalidDestinationException
* if an invalid subscription name is specified.
* @since 1.1
*/
public void unsubscribe(String name) throws JMSException {
checkClosed();
connection.unsubscribe(name);
}
public void dispatch(MessageDispatch messageDispatch) {
try {
executor.execute(messageDispatch);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
connection.onAsyncException(e);
}
}
/**
* Acknowledges all consumed messages of the session of this consumed
* message.
*
* 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.
*
* @throws JMSException
* if the JMS provider fails to acknowledge the messages due to
* some internal error.
* @throws javax.jms.IllegalStateException
* if this method is called on a closed session.
* @see javax.jms.Session#CLIENT_ACKNOWLEDGE
*/
public void acknowledge() throws JMSException {
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer c = (ActiveMQMessageConsumer) iter.next();
c.acknowledge();
}
}
/**
* Add a message consumer.
*
* @param consumer -
* message consumer.
* @throws JMSException
*/
protected void addConsumer(ActiveMQMessageConsumer consumer) throws JMSException {
this.consumers.add(consumer);
if (consumer.isDurableSubscriber()) {
stats.onCreateDurableSubscriber();
}
this.connection.addDispatcher(consumer.getConsumerId(), this);
}
/**
* Remove the message consumer.
*
* @param consumer -
* consumer to be removed.
* @throws JMSException
*/
protected void removeConsumer(ActiveMQMessageConsumer consumer) {
this.connection.removeDispatcher(consumer.getConsumerId());
if (consumer.isDurableSubscriber()) {
stats.onRemoveDurableSubscriber();
}
this.consumers.remove(consumer);
}
/**
* Adds a message producer.
*
* @param producer -
* message producer to be added.
* @throws JMSException
*/
protected void addProducer(ActiveMQMessageProducer producer) throws JMSException {
this.producers.add(producer);
}
/**
* Removes a message producer.
*
* @param producer -
* message producer to be removed.
* @throws JMSException
*/
protected void removeProducer(ActiveMQMessageProducer producer) {
this.producers.remove(producer);
}
/**
* Start this Session.
*
* @throws JMSException
*/
protected void start() throws JMSException {
started.set(true);
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer c = (ActiveMQMessageConsumer) iter.next();
c.start();
}
executor.start();
}
/**
* Stops this session.
* @throws JMSException
*/
protected void stop() throws JMSException {
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer c = (ActiveMQMessageConsumer) iter.next();
c.stop();
}
started.set(false);
executor.stop();
}
/**
* Returns the session id.
*
* @return value - session id.
*/
protected SessionId getSessionId() {
return info.getSessionId();
}
/**
* Sends the message for dispatch by the broker.
*
* @param producer -
* message producer.
* @param destination -
* message destination.
* @param message -
* message to be sent.
* @param deliveryMode -
* JMS messsage delivery mode.
* @param priority -
* message priority.
* @param timeToLive -
* message expiration.
* @throws JMSException
*/
protected void send(ActiveMQMessageProducer producer, ActiveMQDestination destination, Message message, int deliveryMode,
int priority, long timeToLive) throws JMSException {
checkClosed();
if( destination.isTemporary() && connection.isDeleted(destination) ) {
throw new JMSException("Cannot publish to a deleted Destination: "+destination);
}
// tell the Broker we are about to start a new transaction
doStartTransaction();
TransactionId txid = transactionContext.getTransactionId();
message.setJMSDestination(destination);
message.setJMSDeliveryMode(deliveryMode);
long expiration = 0L;
if (!producer.getDisableMessageTimestamp()) {
long timeStamp = System.currentTimeMillis();
message.setJMSTimestamp(timeStamp);
if (timeToLive > 0) {
expiration = timeToLive + timeStamp;
}
}
message.setJMSExpiration(expiration);
message.setJMSPriority(priority);
long sequenceNumber = producer.getMessageSequence();
message.setJMSRedelivered(false);
// transform to our own message format here
ActiveMQMessage msg = ActiveMQMessageTransformation.transformMessage(message, connection);
// Set the message id.
if( msg == message ) {
msg.setMessageId( new MessageId(producer.getProducerInfo().getProducerId(), sequenceNumber) );
} else {
msg.setMessageId( new MessageId(producer.getProducerInfo().getProducerId(), sequenceNumber) );
message.setJMSMessageID(msg.getMessageId().toString());
}
msg.setTransactionId(txid);
if ( connection.isCopyMessageOnSend() ){
msg = (ActiveMQMessage) msg.copy();
}
msg.setConnection(connection);
msg.onSend();
msg.setProducerId(msg.getMessageId().getProducerId());
if (log.isDebugEnabled()) {
log.debug("Sending message: " + msg);
}
if( !connection.isUseSyncSend() && ( !msg.isPersistent() || connection.isUseAsyncSend() || txid!=null) ) {
this.connection.asyncSendPacket(msg);
} else {
this.connection.syncSendPacket(msg);
}
}
/**
* Send TransactionInfo to indicate transaction has started
*
* @throws JMSException
* if some internal error occurs
*/
protected void doStartTransaction() throws JMSException {
if (getTransacted() && !transactionContext.isInXATransaction()) {
transactionContext.begin();
}
}
/**
* Checks whether the session has unconsumed messages.
*
* @return true - if there are unconsumed messages.
*/
public boolean hasUncomsumedMessages() {
return executor.hasUncomsumedMessages();
}
/**
* Checks whether the session uses transactions.
*
* @return true - if the session uses transactions.
*/
public boolean isTransacted() {
return this.acknowledgementMode == Session.SESSION_TRANSACTED;
}
/**
* Checks whether the session used client acknowledgment.
*
* @return true - if the session uses client acknowledgment.
*/
protected boolean isClientAcknowledge() {
return this.acknowledgementMode == Session.CLIENT_ACKNOWLEDGE;
}
/**
* Checks whether the session used auto acknowledgment.
*
* @return true - if the session uses client acknowledgment.
*/
public boolean isAutoAcknowledge() {
return acknowledgementMode==Session.AUTO_ACKNOWLEDGE;
}
/**
* Checks whether the session used dup ok acknowledgment.
*
* @return true - if the session uses client acknowledgment.
*/
public boolean isDupsOkAcknowledge() {
return acknowledgementMode==Session.DUPS_OK_ACKNOWLEDGE;
}
/**
* Returns the message delivery listener.
*
* @return deliveryListener - message delivery listener.
*/
public DeliveryListener getDeliveryListener() {
return deliveryListener;
}
/**
* Sets the message delivery listener.
*
* @param deliveryListener -
* message delivery listener.
*/
public void setDeliveryListener(DeliveryListener deliveryListener) {
this.deliveryListener = deliveryListener;
}
/**
* Returns the SessionInfo bean.
*
* @return info - SessionInfo bean.
* @throws JMSException
*/
protected SessionInfo getSessionInfo() throws JMSException {
SessionInfo info = new SessionInfo(connection.getConnectionInfo(), getSessionId().getValue());
return info;
}
/**
* Send the asynchronus command.
*
* @param command -
* command to be executed.
* @throws JMSException
*/
public void asyncSendPacket(Command command) throws JMSException {
connection.asyncSendPacket(command);
}
/**
* Send the synchronus command.
*
* @param command -
* command to be executed.
* @return Response
* @throws JMSException
*/
public Response syncSendPacket(Command command) throws JMSException {
return connection.syncSendPacket(command);
}
public long getNextDeliveryId() {
return deliveryIdGenerator.getNextSequenceId();
}
public void redispatch(MessageDispatchChannel unconsumedMessages) throws JMSException {
List c = unconsumedMessages.removeAll();
Collections.reverse(c);
for (Iterator iter = c.iterator(); iter.hasNext();) {
MessageDispatch md = (MessageDispatch) iter.next();
executor.executeFirst(md);
}
}
public boolean isRunning() {
return started.get();
}
public boolean isAsyncDispatch() {
return asyncDispatch;
}
public void setAsyncDispatch(boolean asyncDispatch) {
this.asyncDispatch = asyncDispatch;
}
/**
* @return Returns the sessionAsyncDispatch.
*/
public boolean isSessionAsyncDispatch(){
return sessionAsyncDispatch;
}
/**
* @param sessionAsyncDispatch The sessionAsyncDispatch to set.
*/
public void setSessionAsyncDispatch(boolean sessionAsyncDispatch){
this.sessionAsyncDispatch=sessionAsyncDispatch;
}
public List getUnconsumedMessages() {
return executor.getUnconsumedMessages();
}
public String toString() {
return "ActiveMQSession {id="+info.getSessionId()+",started="+started.get()+"}";
}
public void checkMessageListener() throws JMSException {
if (messageListener != null) {
throw new IllegalStateException("Cannot synchronously receive a message when a MessageListener is set");
}
for (Iterator i = consumers.iterator(); i.hasNext();) {
ActiveMQMessageConsumer consumer = (ActiveMQMessageConsumer) i.next();
if( consumer.getMessageListener()!=null ) {
throw new IllegalStateException("Cannot synchronously receive a message when a MessageListener is set");
}
}
}
protected void setOptimizeAcknowledge(boolean value){
for (Iterator iter = consumers.iterator(); iter.hasNext();) {
ActiveMQMessageConsumer c = (ActiveMQMessageConsumer) iter.next();
c.setOptimizeAcknowledge(value);
}
}
protected void setPrefetchSize(ConsumerId id,int prefetch){
for(Iterator iter=consumers.iterator();iter.hasNext();){
ActiveMQMessageConsumer c=(ActiveMQMessageConsumer) iter.next();
if(c.getConsumerId().equals(id)){
c.setPrefetchSize(prefetch);
break;
}
}
}
protected void close(ConsumerId id){
for(Iterator iter=consumers.iterator();iter.hasNext();){
ActiveMQMessageConsumer c=(ActiveMQMessageConsumer) iter.next();
if(c.getConsumerId().equals(id)){
try{
c.close();
}catch(JMSException e){
log.warn("Exception closing consumer",e);
}
log.warn("Closed consumer on Command");
break;
}
}
}
public boolean isInUse(ActiveMQTempDestination destination) {
for(Iterator iter=consumers.iterator();iter.hasNext();){
ActiveMQMessageConsumer c=(ActiveMQMessageConsumer) iter.next();
if( c.isInUse(destination) ) {
return true;
}
}
return false;
}
}