/**
* 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.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.naming.Context;
import org.apache.activemq.blob.BlobTransferPolicy;
import org.apache.activemq.jndi.JNDIBaseStorable;
import org.apache.activemq.management.JMSStatsImpl;
import org.apache.activemq.management.StatsCapable;
import org.apache.activemq.management.StatsImpl;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFactory;
import org.apache.activemq.transport.TransportListener;
import org.apache.activemq.util.IdGenerator;
import org.apache.activemq.util.IntrospectionSupport;
import org.apache.activemq.util.JMSExceptionSupport;
import org.apache.activemq.util.URISupport;
import org.apache.activemq.util.URISupport.CompositeData;
/**
* A ConnectionFactory is an an Administered object, and is used for creating
* Connections. <p/> This class also implements QueueConnectionFactory and
* TopicConnectionFactory. You can use this connection to create both
* QueueConnections and TopicConnections.
*
* @version $Revision: 1.9 $
* @see javax.jms.ConnectionFactory
*/
public class ActiveMQConnectionFactory extends JNDIBaseStorable implements ConnectionFactory, QueueConnectionFactory, TopicConnectionFactory, StatsCapable, Cloneable {
public static final String DEFAULT_BROKER_URL = "tcp://localhost:61616";
public static final String DEFAULT_USER = null;
public static final String DEFAULT_PASSWORD = null;
public static final int DEFAULT_PRODUCER_WINDOW_SIZE = 0;
protected static final Executor DEFAULT_CONNECTION_EXECUTOR = new ScheduledThreadPoolExecutor(5, new ThreadFactory() {
public Thread newThread(Runnable run) {
Thread thread = new Thread(run);
thread.setPriority(ThreadPriorities.INBOUND_CLIENT_CONNECTION);
return thread;
}
});
protected URI brokerURL;
protected String userName;
protected String password;
protected String clientID;
protected boolean dispatchAsync;
protected boolean alwaysSessionAsync = true;
JMSStatsImpl factoryStats = new JMSStatsImpl();
private IdGenerator clientIdGenerator;
private String clientIDPrefix;
// client policies
private ActiveMQPrefetchPolicy prefetchPolicy = new ActiveMQPrefetchPolicy();
private RedeliveryPolicy redeliveryPolicy = new RedeliveryPolicy();
private BlobTransferPolicy blobTransferPolicy = new BlobTransferPolicy();
private MessageTransformer transformer;
private boolean disableTimeStampsByDefault;
private boolean optimizedMessageDispatch = true;
private boolean copyMessageOnSend = true;
private boolean useCompression;
private boolean objectMessageSerializationDefered;
private boolean useAsyncSend;
private boolean optimizeAcknowledge;
private int closeTimeout = 15000;
private boolean useRetroactiveConsumer;
private boolean exclusiveConsumer;
private boolean nestedMapAndListEnabled = true;
private boolean alwaysSyncSend;
private boolean watchTopicAdvisories = true;
private int producerWindowSize = DEFAULT_PRODUCER_WINDOW_SIZE;
private long warnAboutUnstartedConnectionTimeout = 500L;
private TransportListener transportListener;
// /////////////////////////////////////////////
//
// ConnectionFactory, QueueConnectionFactory, TopicConnectionFactory Methods
//
// /////////////////////////////////////////////
public ActiveMQConnectionFactory() {
this(DEFAULT_BROKER_URL);
}
public ActiveMQConnectionFactory(String brokerURL) {
this(createURI(brokerURL));
}
public ActiveMQConnectionFactory(URI brokerURL) {
setBrokerURL(brokerURL.toString());
}
public ActiveMQConnectionFactory(String userName, String password, URI brokerURL) {
setUserName(userName);
setPassword(password);
setBrokerURL(brokerURL.toString());
}
public ActiveMQConnectionFactory(String userName, String password, String brokerURL) {
setUserName(userName);
setPassword(password);
setBrokerURL(brokerURL);
}
/**
* Returns a copy of the given connection factory
*/
public ActiveMQConnectionFactory copy() {
try {
return (ActiveMQConnectionFactory)super.clone();
} catch (CloneNotSupportedException e) {
throw new RuntimeException("This should never happen: " + e, e);
}
}
/**
* @param brokerURL
* @return
* @throws URISyntaxException
*/
private static URI createURI(String brokerURL) {
try {
return new URI(brokerURL);
} catch (URISyntaxException e) {
throw (IllegalArgumentException)new IllegalArgumentException("Invalid broker URI: " + brokerURL).initCause(e);
}
}
/**
* @return Returns the Connection.
*/
public Connection createConnection() throws JMSException {
return createActiveMQConnection();
}
/**
* @return Returns the Connection.
*/
public Connection createConnection(String userName, String password) throws JMSException {
return createActiveMQConnection(userName, password);
}
/**
* @return Returns the QueueConnection.
* @throws JMSException
*/
public QueueConnection createQueueConnection() throws JMSException {
return createActiveMQConnection();
}
/**
* @return Returns the QueueConnection.
*/
public QueueConnection createQueueConnection(String userName, String password) throws JMSException {
return createActiveMQConnection(userName, password);
}
/**
* @return Returns the TopicConnection.
* @throws JMSException
*/
public TopicConnection createTopicConnection() throws JMSException {
return createActiveMQConnection();
}
/**
* @return Returns the TopicConnection.
*/
public TopicConnection createTopicConnection(String userName, String password) throws JMSException {
return createActiveMQConnection(userName, password);
}
public StatsImpl getStats() {
// TODO
return null;
}
// /////////////////////////////////////////////
//
// Implementation methods.
//
// /////////////////////////////////////////////
protected ActiveMQConnection createActiveMQConnection() throws JMSException {
return createActiveMQConnection(userName, password);
}
/**
* Creates a Transport based on this object's connection settings. Separated
* from createActiveMQConnection to allow for subclasses to override.
*
* @return The newly created Transport.
* @throws JMSException If unable to create trasnport.
* @author sepandm@gmail.com
*/
protected Transport createTransport() throws JMSException {
try {
return TransportFactory.connect(brokerURL, DEFAULT_CONNECTION_EXECUTOR);
} catch (Exception e) {
throw JMSExceptionSupport.create("Could not create Transport. Reason: " + e, e);
}
}
/**
* @return Returns the Connection.
*/
protected ActiveMQConnection createActiveMQConnection(String userName, String password) throws JMSException {
if (brokerURL == null) {
throw new ConfigurationException("brokerURL not set.");
}
ActiveMQConnection connection = null;
try {
Transport transport = createTransport();
connection = createActiveMQConnection(transport, factoryStats);
connection.setUserName(userName);
connection.setPassword(password);
configureConnection(connection);
transport.start();
if (clientID != null) {
connection.setDefaultClientID(clientID);
}
return connection;
} catch (JMSException e) {
// Clean up!
try {
connection.close();
} catch (Throwable ignore) {
}
throw e;
} catch (Exception e) {
// Clean up!
try {
connection.close();
} catch (Throwable ignore) {
}
throw JMSExceptionSupport.create("Could not connect to broker URL: " + brokerURL + ". Reason: " + e, e);
}
}
protected ActiveMQConnection createActiveMQConnection(Transport transport, JMSStatsImpl stats) throws Exception {
ActiveMQConnection connection = new ActiveMQConnection(transport, getClientIdGenerator(), stats);
return connection;
}
protected void configureConnection(ActiveMQConnection connection) {
connection.setPrefetchPolicy(getPrefetchPolicy());
connection.setDisableTimeStampsByDefault(isDisableTimeStampsByDefault());
connection.setOptimizedMessageDispatch(isOptimizedMessageDispatch());
connection.setCopyMessageOnSend(isCopyMessageOnSend());
connection.setUseCompression(isUseCompression());
connection.setObjectMessageSerializationDefered(isObjectMessageSerializationDefered());
connection.setDispatchAsync(isDispatchAsync());
connection.setUseAsyncSend(isUseAsyncSend());
connection.setAlwaysSyncSend(isAlwaysSyncSend());
connection.setAlwaysSessionAsync(isAlwaysSessionAsync());
connection.setOptimizeAcknowledge(isOptimizeAcknowledge());
connection.setUseRetroactiveConsumer(isUseRetroactiveConsumer());
connection.setRedeliveryPolicy(getRedeliveryPolicy());
connection.setTransformer(getTransformer());
connection.setBlobTransferPolicy(getBlobTransferPolicy().copy());
connection.setWatchTopicAdvisories(isWatchTopicAdvisories());
connection.setProducerWindowSize(getProducerWindowSize());
connection.setWarnAboutUnstartedConnectionTimeout(getWarnAboutUnstartedConnectionTimeout());
if (transportListener != null) {
connection.addTransportListener(transportListener);
}
}
// /////////////////////////////////////////////
//
// Property Accessors
//
// /////////////////////////////////////////////
public String getBrokerURL() {
return brokerURL == null ? null : brokerURL.toString();
}
/**
* Sets the <a
* href="http://activemq.apache.org/configuring-transports.html">connection
* URL</a> used to connect to the ActiveMQ broker.
*/
public void setBrokerURL(String brokerURL) {
this.brokerURL = createURI(brokerURL);
// Use all the properties prefixed with 'jms.' to set the connection
// factory
// options.
if (this.brokerURL.getQuery() != null) {
// It might be a standard URI or...
try {
Map map = URISupport.parseQuery(this.brokerURL.getQuery());
if (buildFromMap(IntrospectionSupport.extractProperties(map, "jms."))) {
this.brokerURL = URISupport.createRemainingURI(this.brokerURL, map);
}
} catch (URISyntaxException e) {
}
} else {
// It might be a composite URI.
try {
CompositeData data = URISupport.parseComposite(this.brokerURL);
if (buildFromMap(IntrospectionSupport.extractProperties(data.getParameters(), "jms."))) {
this.brokerURL = data.toURI();
}
} catch (URISyntaxException e) {
}
}
}
public String getClientID() {
return clientID;
}
/**
* Sets the JMS clientID to use for the created connection. Note that this
* can only be used by one connection at once so generally its a better idea
* to set the clientID on a Connection
*/
public void setClientID(String clientID) {
this.clientID = clientID;
}
public boolean isCopyMessageOnSend() {
return copyMessageOnSend;
}
/**
* Should a JMS message be copied to a new JMS Message object as part of the
* send() method in JMS. This is enabled by default to be compliant with the
* JMS specification. You can disable it if you do not mutate JMS messages
* after they are sent for a performance boost
*/
public void setCopyMessageOnSend(boolean copyMessageOnSend) {
this.copyMessageOnSend = copyMessageOnSend;
}
public boolean isDisableTimeStampsByDefault() {
return disableTimeStampsByDefault;
}
/**
* Sets whether or not timestamps on messages should be disabled or not. If
* you disable them it adds a small performance boost.
*/
public void setDisableTimeStampsByDefault(boolean disableTimeStampsByDefault) {
this.disableTimeStampsByDefault = disableTimeStampsByDefault;
}
public boolean isOptimizedMessageDispatch() {
return optimizedMessageDispatch;
}
/**
* If this flag is set then an larger prefetch limit is used - only
* applicable for durable topic subscribers.
*/
public void setOptimizedMessageDispatch(boolean optimizedMessageDispatch) {
this.optimizedMessageDispatch = optimizedMessageDispatch;
}
public String getPassword() {
return password;
}
/**
* Sets the JMS password used for connections created from this factory
*/
public void setPassword(String password) {
this.password = password;
}
public ActiveMQPrefetchPolicy getPrefetchPolicy() {
return prefetchPolicy;
}
/**
* Sets the <a
* href="http://activemq.apache.org/what-is-the-prefetch-limit-for.html">prefetch
* policy</a> for consumers created by this connection.
*/
public void setPrefetchPolicy(ActiveMQPrefetchPolicy prefetchPolicy) {
this.prefetchPolicy = prefetchPolicy;
}
public boolean isUseAsyncSend() {
return useAsyncSend;
}
public BlobTransferPolicy getBlobTransferPolicy() {
return blobTransferPolicy;
}
/**
* Sets the policy used to describe how out-of-band BLOBs (Binary Large
* OBjects) are transferred from producers to brokers to consumers
*/
public void setBlobTransferPolicy(BlobTransferPolicy blobTransferPolicy) {
this.blobTransferPolicy = blobTransferPolicy;
}
/**
* Forces the use of <a
* href="http://activemq.apache.org/async-sends.html">Async Sends</a> which
* adds a massive performance boost; but means that the send() method will
* return immediately whether the message has been sent or not which could
* lead to message loss.
*/
public void setUseAsyncSend(boolean useAsyncSend) {
this.useAsyncSend = useAsyncSend;
}
public synchronized boolean isWatchTopicAdvisories() {
return watchTopicAdvisories;
}
public synchronized void setWatchTopicAdvisories(boolean watchTopicAdvisories) {
this.watchTopicAdvisories = watchTopicAdvisories;
}
/**
* @return true if always sync send messages
*/
public boolean isAlwaysSyncSend() {
return this.alwaysSyncSend;
}
/**
* Set true if always require messages to be sync sent
*
* @param alwaysSyncSend
*/
public void setAlwaysSyncSend(boolean alwaysSyncSend) {
this.alwaysSyncSend = alwaysSyncSend;
}
public String getUserName() {
return userName;
}
/**
* Sets the JMS userName used by connections created by this factory
*/
public void setUserName(String userName) {
this.userName = userName;
}
public boolean isUseRetroactiveConsumer() {
return useRetroactiveConsumer;
}
/**
* Sets whether or not retroactive consumers are enabled. Retroactive
* consumers allow non-durable topic subscribers to receive old messages
* that were published before the non-durable subscriber started.
*/
public void setUseRetroactiveConsumer(boolean useRetroactiveConsumer) {
this.useRetroactiveConsumer = useRetroactiveConsumer;
}
public boolean isExclusiveConsumer() {
return exclusiveConsumer;
}
/**
* Enables or disables whether or not queue consumers should be exclusive or
* not for example to preserve ordering when not using <a
* href="http://activemq.apache.org/message-groups.html">Message Groups</a>
*
* @param exclusiveConsumer
*/
public void setExclusiveConsumer(boolean exclusiveConsumer) {
this.exclusiveConsumer = exclusiveConsumer;
}
public RedeliveryPolicy getRedeliveryPolicy() {
return redeliveryPolicy;
}
/**
* Sets the global redelivery policy to be used when a message is delivered
* but the session is rolled back
*/
public void setRedeliveryPolicy(RedeliveryPolicy redeliveryPolicy) {
this.redeliveryPolicy = redeliveryPolicy;
}
public MessageTransformer getTransformer() {
return 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
*/
public void setTransformer(MessageTransformer transformer) {
this.transformer = transformer;
}
public void buildFromProperties(Properties properties) {
if (properties == null) {
properties = new Properties();
}
String temp = properties.getProperty(Context.PROVIDER_URL);
if (temp == null || temp.length() == 0) {
temp = properties.getProperty("brokerURL");
}
if (temp != null && temp.length() > 0) {
setBrokerURL(temp);
}
Map<String, Object> p = new HashMap(properties);
buildFromMap(p);
}
public boolean buildFromMap(Map<String, Object> properties) {
boolean rc = false;
ActiveMQPrefetchPolicy p = new ActiveMQPrefetchPolicy();
if (IntrospectionSupport.setProperties(p, properties, "prefetchPolicy.")) {
setPrefetchPolicy(p);
rc = true;
}
RedeliveryPolicy rp = new RedeliveryPolicy();
if (IntrospectionSupport.setProperties(rp, properties, "redeliveryPolicy.")) {
setRedeliveryPolicy(rp);
rc = true;
}
BlobTransferPolicy blobTransferPolicy = new BlobTransferPolicy();
if (IntrospectionSupport.setProperties(blobTransferPolicy, properties, "blobTransferPolicy.")) {
setBlobTransferPolicy(blobTransferPolicy);
rc = true;
}
rc |= IntrospectionSupport.setProperties(this, properties);
return rc;
}
public void populateProperties(Properties props) {
props.setProperty("dispatchAsync", Boolean.toString(isDispatchAsync()));
if (getBrokerURL() != null) {
props.setProperty(Context.PROVIDER_URL, getBrokerURL());
props.setProperty("brokerURL", getBrokerURL());
}
if (getClientID() != null) {
props.setProperty("clientID", getClientID());
}
IntrospectionSupport.getProperties(getPrefetchPolicy(), props, "prefetchPolicy.");
IntrospectionSupport.getProperties(getRedeliveryPolicy(), props, "redeliveryPolicy.");
IntrospectionSupport.getProperties(getBlobTransferPolicy(), props, "blobTransferPolicy.");
props.setProperty("copyMessageOnSend", Boolean.toString(isCopyMessageOnSend()));
props.setProperty("disableTimeStampsByDefault", Boolean.toString(isDisableTimeStampsByDefault()));
props.setProperty("objectMessageSerializationDefered", Boolean.toString(isObjectMessageSerializationDefered()));
props.setProperty("optimizedMessageDispatch", Boolean.toString(isOptimizedMessageDispatch()));
if (getPassword() != null) {
props.setProperty("password", getPassword());
}
props.setProperty("useAsyncSend", Boolean.toString(isUseAsyncSend()));
props.setProperty("useCompression", Boolean.toString(isUseCompression()));
props.setProperty("useRetroactiveConsumer", Boolean.toString(isUseRetroactiveConsumer()));
props.setProperty("watchTopicAdvisories", Boolean.toString(isWatchTopicAdvisories()));
if (getUserName() != null) {
props.setProperty("userName", getUserName());
}
props.setProperty("closeTimeout", Integer.toString(getCloseTimeout()));
props.setProperty("alwaysSessionAsync", Boolean.toString(isAlwaysSessionAsync()));
props.setProperty("optimizeAcknowledge", Boolean.toString(isOptimizeAcknowledge()));
props.setProperty("statsEnabled", Boolean.toString(isStatsEnabled()));
props.setProperty("alwaysSyncSend", Boolean.toString(isAlwaysSyncSend()));
props.setProperty("producerWindowSize", Integer.toString(getProducerWindowSize()));
}
public boolean isUseCompression() {
return useCompression;
}
/**
* Enables the use of compression of the message bodies
*/
public void setUseCompression(boolean useCompression) {
this.useCompression = useCompression;
}
public boolean isObjectMessageSerializationDefered() {
return objectMessageSerializationDefered;
}
/**
* When an object is set on an ObjectMessage, the JMS spec requires the
* object to be serialized by that set method. Enabling this flag causes the
* object to not get serialized. The object may subsequently get serialized
* if the message needs to be sent over a socket or stored to disk.
*/
public void setObjectMessageSerializationDefered(boolean objectMessageSerializationDefered) {
this.objectMessageSerializationDefered = objectMessageSerializationDefered;
}
public boolean isDispatchAsync() {
return dispatchAsync;
}
/**
* Enables or disables the default setting of whether or not consumers have
* their messages <a
* href="http://activemq.apache.org/consumer-dispatch-async.html">dispatched
* synchronously or asynchronously by the broker</a>. For non-durable
* topics for example we typically dispatch synchronously by default to
* minimize context switches which boost performance. However sometimes its
* better to go slower to ensure that a single blocked consumer socket does
* not block delivery to other consumers.
*
* @param asyncDispatch If true then consumers created on this connection
* will default to having their messages dispatched
* asynchronously. The default value is false.
*/
public void setDispatchAsync(boolean asyncDispatch) {
this.dispatchAsync = asyncDispatch;
}
/**
* @return Returns the closeTimeout.
*/
public int getCloseTimeout() {
return closeTimeout;
}
/**
* Sets the timeout before a close is considered complete. Normally a
* close() on a connection waits for confirmation from the broker; this
* allows that operation to timeout to save the client hanging if there is
* no broker
*/
public void setCloseTimeout(int closeTimeout) {
this.closeTimeout = closeTimeout;
}
/**
* @return Returns the alwaysSessionAsync.
*/
public boolean isAlwaysSessionAsync() {
return alwaysSessionAsync;
}
/**
* If this flag is set then a separate thread is not used for dispatching
* messages for each Session in the Connection. However, a separate thread
* is always used if there is more than one session, or the session isn't in
* auto acknowledge or duplicates ok mode
*/
public void setAlwaysSessionAsync(boolean alwaysSessionAsync) {
this.alwaysSessionAsync = alwaysSessionAsync;
}
/**
* @return Returns the optimizeAcknowledge.
*/
public boolean isOptimizeAcknowledge() {
return optimizeAcknowledge;
}
/**
* @param optimizeAcknowledge The optimizeAcknowledge to set.
*/
public void setOptimizeAcknowledge(boolean optimizeAcknowledge) {
this.optimizeAcknowledge = optimizeAcknowledge;
}
public boolean isNestedMapAndListEnabled() {
return nestedMapAndListEnabled;
}
/**
* Enables/disables whether or not Message properties and MapMessage entries
* support <a
* href="http://activemq.apache.org/structured-message-properties-and-mapmessages.html">Nested
* Structures</a> of Map and List objects
*/
public void setNestedMapAndListEnabled(boolean structuredMapsEnabled) {
this.nestedMapAndListEnabled = structuredMapsEnabled;
}
public String getClientIDPrefix() {
return clientIDPrefix;
}
/**
* Sets the prefix used by autogenerated JMS Client ID values which are used
* if the JMS client does not explicitly specify on.
*
* @param clientIDPrefix
*/
public void setClientIDPrefix(String clientIDPrefix) {
this.clientIDPrefix = clientIDPrefix;
}
protected synchronized IdGenerator getClientIdGenerator() {
if (clientIdGenerator == null) {
if (clientIDPrefix != null) {
clientIdGenerator = new IdGenerator(clientIDPrefix);
} else {
clientIdGenerator = new IdGenerator();
}
}
return clientIdGenerator;
}
protected void setClientIdGenerator(IdGenerator clientIdGenerator) {
this.clientIdGenerator = clientIdGenerator;
}
/**
* @return the statsEnabled
*/
public boolean isStatsEnabled() {
return this.factoryStats.isEnabled();
}
/**
* @param statsEnabled the statsEnabled to set
*/
public void setStatsEnabled(boolean statsEnabled) {
this.factoryStats.setEnabled(statsEnabled);
}
public synchronized int getProducerWindowSize() {
return producerWindowSize;
}
public synchronized void setProducerWindowSize(int producerWindowSize) {
this.producerWindowSize = producerWindowSize;
}
public long getWarnAboutUnstartedConnectionTimeout() {
return warnAboutUnstartedConnectionTimeout;
}
/**
* Enables the timeout from a connection creation to when a warning is
* generated if the connection is not properly started via
* {@link Connection#start()} and a message is received by a consumer. It is
* a very common gotcha to forget to <a
* href="http://activemq.apache.org/i-am-not-receiving-any-messages-what-is-wrong.html">start
* the connection</a> so this option makes the default case to create a
* warning if the user forgets. To disable the warning just set the value to <
* 0 (say -1).
*/
public void setWarnAboutUnstartedConnectionTimeout(long warnAboutUnstartedConnectionTimeout) {
this.warnAboutUnstartedConnectionTimeout = warnAboutUnstartedConnectionTimeout;
}
public TransportListener getTransportListener() {
return transportListener;
}
/**
* Allows a listener to be configured on the ConnectionFactory so that when this factory is used
* with frameworks which don't expose the Connection such as Spring JmsTemplate, you can still register
* a transport listener.
*
* @param transportListener sets the listener to be registered on all connections
* created by this factory
*/
public void setTransportListener(TransportListener transportListener) {
this.transportListener = transportListener;
}
}