Chapter 308. Simple JMS2 Component Available as of Camel version 2.19 The Simple JMS 2.0 Component, or SJMS2, is a JMS client for use with Camel that uses well known best practices when it comes to JMS client creation and configuration. SJMS2 contains a brand new JMS 2.0 client API written explicitly for Camel eliminating third party messaging implementations keeping it light and resilient. The following features is included: Standard Queue and Topic Support (Durable & Non-Durable) InOnly & InOut MEP Support Asynchronous Producer and Consumer Processing Internal JMS Transaction Support Additional key features include: Plugable Connection Resource Management Session, Consumer, & Producer Pooling & Caching Management Batch Consumers and Producers Transacted Batch Consumers & Producers Support for Customizable Transaction Commit Strategies (Local JMS Transactions only) Note Why the S in SJMS S stands for Simple and Standard and Springless. Also camel-jms was already taken. Maven users will need to add the following dependency to their pom.xml for this component: <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-sjms2</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency> 308.1. URI format Where destinationName is a JMS queue or topic name. By default, the destinationName is interpreted as a queue name. For example, to connect to the queue, FOO.BAR use: You can include the optional queue: prefix, if you prefer: To connect to a topic, you must include the topic: prefix. For example, to connect to the topic, Stocks.Prices , use: You append query options to the URI using the following format, ?option=value&option=value&... 308.2. Component Options and Configurations The Simple JMS2 component supports 15 options, which are listed below. Name Description Default Type connectionFactory (advanced) A ConnectionFactory is required to enable the SjmsComponent. It can be set directly or set set as part of a ConnectionResource. ConnectionFactory connectionResource (advanced) A ConnectionResource is an interface that allows for customization and container control of the ConnectionFactory. See Plugable Connection Resource Management for further details. ConnectionResource connectionCount (common) The maximum number of connections available to endpoints started under this component 1 Integer jmsKeyFormatStrategy (advanced) Pluggable strategy for encoding and decoding JMS keys so they can be compliant with the JMS specification. Camel provides one implementation out of the box: default. The default strategy will safely marshal dots and hyphens (. and -). Can be used for JMS brokers which do not care whether JMS header keys contain illegal characters. You can provide your own implementation of the org.apache.camel.component.jms.JmsKeyFormatStrategy and refer to it using the # notation. JmsKeyFormatStrategy transactionCommit Strategy (transaction) To configure which kind of commit strategy to use. Camel provides two implementations out of the box, default and batch. TransactionCommit Strategy destinationCreation Strategy (advanced) To use a custom DestinationCreationStrategy. DestinationCreation Strategy timedTaskManager (advanced) To use a custom TimedTaskManager TimedTaskManager messageCreatedStrategy (advanced) To use the given MessageCreatedStrategy which are invoked when Camel creates new instances of javax.jms.Message objects when Camel is sending a JMS message. MessageCreatedStrategy connectionTestOnBorrow (advanced) When using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource then should each javax.jms.Connection be tested (calling start) before returned from the pool. true boolean connectionUsername (security) The username to use when creating javax.jms.Connection when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. String connectionPassword (security) The password to use when creating javax.jms.Connection when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. String connectionClientId (advanced) The client ID to use when creating javax.jms.Connection when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. String connectionMaxWait (advanced) The max wait time in millis to block and wait on free connection when the pool is exhausted when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. 5000 long headerFilterStrategy (filter) To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. HeaderFilterStrategy resolveProperty Placeholders (advanced) Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. true boolean The Simple JMS2 endpoint is configured using URI syntax: with the following path and query parameters: 308.2.1. Path Parameters (2 parameters): Name Description Default Type destinationType The kind of destination to use queue String destinationName Required DestinationName is a JMS queue or topic name. By default, the destinationName is interpreted as a queue name. String 308.2.2. Query Parameters (37 parameters): Name Description Default Type acknowledgementMode (common) The JMS acknowledgement name, which is one of: SESSION_TRANSACTED, CLIENT_ACKNOWLEDGE, AUTO_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE AUTO_ ACKNOWLEDGE SessionAcknowledgement Type bridgeErrorHandler (consumer) Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. false boolean consumerCount (consumer) Sets the number of consumer listeners used for this endpoint. 1 int durable (consumer) Sets topic consumer to durable. false boolean durableSubscriptionId (consumer) Sets the durable subscription Id required for durable topics. String shared (consumer) Sets the consumer to shared. false boolean subscriptionId (consumer) Sets the subscription Id, required for durable or shared topics. String synchronous (consumer) Sets whether synchronous processing should be strictly used or Camel is allowed to use asynchronous processing (if supported). true boolean exceptionHandler (consumer) To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored. ExceptionHandler exchangePattern (consumer) Sets the exchange pattern when the consumer creates an exchange. ExchangePattern messageSelector (consumer) Sets the JMS Message selector syntax. String namedReplyTo (producer) Sets the reply to destination name used for InOut producer endpoints. String persistent (producer) Flag used to enable/disable message persistence. true boolean producerCount (producer) Sets the number of producers used for this endpoint. 1 int ttl (producer) Flag used to adjust the Time To Live value of produced messages. -1 long allowNullBody (producer) Whether to allow sending messages with no body. If this option is false and the message body is null, then an JMSException is thrown. true boolean prefillPool (producer) Whether to prefill the producer connection pool on startup, or create connections lazy when needed. true boolean responseTimeOut (producer) Sets the amount of time we should wait before timing out a InOut response. 5000 long asyncStartListener (advanced) Whether to startup the consumer message listener asynchronously, when starting a route. For example if a JmsConsumer cannot get a connection to a remote JMS broker, then it may block while retrying and/or failover. This will cause Camel to block while starting routes. By setting this option to true, you will let routes startup, while the JmsConsumer connects to the JMS broker using a dedicated thread in asynchronous mode. If this option is used, then beware that if the connection could not be established, then an exception is logged at WARN level, and the consumer will not be able to receive messages; You can then restart the route to retry. false boolean asyncStopListener (advanced) Whether to stop the consumer message listener asynchronously, when stopping a route. false boolean connectionCount (advanced) The maximum number of connections available to this endpoint Integer connectionFactory (advanced) Initializes the connectionFactory for the endpoint, which takes precedence over the component's connectionFactory, if any ConnectionFactory connectionResource (advanced) Initializes the connectionResource for the endpoint, which takes precedence over the component's connectionResource, if any ConnectionResource destinationCreationStrategy (advanced) To use a custom DestinationCreationStrategy. DestinationCreation Strategy exceptionListener (advanced) Specifies the JMS Exception Listener that is to be notified of any underlying JMS exceptions. ExceptionListener headerFilterStrategy (advanced) To use a custom HeaderFilterStrategy to filter header to and from Camel message. HeaderFilterStrategy includeAllJMSXProperties (advanced) Whether to include all JMSXxxx properties when mapping from JMS to Camel Message. Setting this to true will include properties such as JMSXAppID, and JMSXUserID etc. Note: If you are using a custom headerFilterStrategy then this option does not apply. false boolean jmsKeyFormatStrategy (advanced) Pluggable strategy for encoding and decoding JMS keys so they can be compliant with the JMS specification.Camel provides two implementations out of the box: default and passthrough. The default strategy will safely marshal dots and hyphens (. and -). The passthrough strategy leaves the key as is. Can be used for JMS brokers which do not care whether JMS header keys contain illegal characters. You can provide your own implementation of the org.apache.camel.component.jms.JmsKeyFormatStrategy and refer to it using the # notation. JmsKeyFormatStrategy mapJmsMessage (advanced) Specifies whether Camel should auto map the received JMS message to a suited payload type, such as javax.jms.TextMessage to a String etc. See section about how mapping works below for more details. true boolean messageCreatedStrategy (advanced) To use the given MessageCreatedStrategy which are invoked when Camel creates new instances of javax.jms.Message objects when Camel is sending a JMS message. MessageCreatedStrategy errorHandlerLoggingLevel (logging) Allows to configure the default errorHandler logging level for logging uncaught exceptions. WARN LoggingLevel errorHandlerLogStackTrace (logging) Allows to control whether stacktraces should be logged or not, by the default errorHandler. true boolean transacted (transaction) Specifies whether to use transacted mode false boolean transactionBatchCount (transaction) If transacted sets the number of messages to process before committing a transaction. -1 int transactionBatchTimeout (transaction) Sets timeout (in millis) for batch transactions, the value should be 1000 or higher. 5000 long transactionCommitStrategy (transaction) Sets the commit strategy. TransactionCommit Strategy sharedJMSSession (transaction) Specifies whether to share JMS session with other SJMS endpoints. Turn this off if your route is accessing to multiple JMS providers. If you need transaction against multiple JMS providers, use jms component to leverage XA transaction. true boolean 308.3. Spring Boot Auto-Configuration The component supports 16 options, which are listed below. Name Description Default Type camel.component.sjms2.connection-client-id The client ID to use when creating javax.jms.Connection when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. String camel.component.sjms2.connection-count The maximum number of connections available to endpoints started under this component 1 Integer camel.component.sjms2.connection-factory A ConnectionFactory is required to enable the SjmsComponent. It can be set directly or set set as part of a ConnectionResource. The option is a javax.jms.ConnectionFactory type. String camel.component.sjms2.connection-max-wait The max wait time in millis to block and wait on free connection when the pool is exhausted when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. 5000 Long camel.component.sjms2.connection-password The password to use when creating javax.jms.Connection when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. String camel.component.sjms2.connection-resource A ConnectionResource is an interface that allows for customization and container control of the ConnectionFactory. See Plugable Connection Resource Management for further details. The option is a org.apache.camel.component.sjms.jms.ConnectionResource type. String camel.component.sjms2.connection-test-on-borrow When using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource then should each javax.jms.Connection be tested (calling start) before returned from the pool. true Boolean camel.component.sjms2.connection-username The username to use when creating javax.jms.Connection when using the default org.apache.camel.component.sjms.jms.ConnectionFactoryResource. String camel.component.sjms2.destination-creation-strategy To use a custom DestinationCreationStrategy. The option is a org.apache.camel.component.sjms.jms.DestinationCreationStrategy type. String camel.component.sjms2.enabled Enable sjms2 component true Boolean camel.component.sjms2.header-filter-strategy To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. The option is a org.apache.camel.spi.HeaderFilterStrategy type. String camel.component.sjms2.jms-key-format-strategy Pluggable strategy for encoding and decoding JMS keys so they can be compliant with the JMS specification. Camel provides one implementation out of the box: default. The default strategy will safely marshal dots and hyphens (. and -). Can be used for JMS brokers which do not care whether JMS header keys contain illegal characters. You can provide your own implementation of the org.apache.camel.component.jms.JmsKeyFormatStrategy and refer to it using the # notation. The option is a org.apache.camel.component.sjms.jms.JmsKeyFormatStrategy type. String camel.component.sjms2.message-created-strategy To use the given MessageCreatedStrategy which are invoked when Camel creates new instances of javax.jms.Message objects when Camel is sending a JMS message. The option is a org.apache.camel.component.sjms.jms.MessageCreatedStrategy type. String camel.component.sjms2.resolve-property-placeholders Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. true Boolean camel.component.sjms2.timed-task-manager To use a custom TimedTaskManager. The option is a org.apache.camel.component.sjms.taskmanager.TimedTaskManager type. String camel.component.sjms2.transaction-commit-strategy To configure which kind of commit strategy to use. Camel provides two implementations out of the box, default and batch. The option is a org.apache.camel.component.sjms.TransactionCommitStrategy type. String Below is an example of how to configure the Sjms2Component with its required ConnectionFactory provider. It will create a single connection by default and store it using the component's internal pooling APIs to ensure that it is able to service Session creation requests in a thread safe manner. Sjms2Component component = new Sjms2Component(); component.setConnectionFactory(new ActiveMQConnectionFactory("tcp://localhost:61616")); getContext().addComponent("sjms2", component); For a SJMS2 component that is required to support a durable subscription, you can override the default ConnectionFactoryResource instance and set the clientId property. ConnectionFactoryResource connectionResource = new ConnectionFactoryResource(); connectionResource.setConnectionFactory(new ActiveMQConnectionFactory("tcp://localhost:61616")); connectionResource.setClientId("myclient-id"); Sjms2Component component = new Sjms2Component(); component.setConnectionResource(connectionResource); component.setMaxConnections(1); 308.4. Producer Usage 308.4.1. InOnly Producer - (Default) The InOnly producer is the default behavior of the SJMS2 Producer Endpoint. from("direct:start") .to("sjms2:queue:bar"); 308.4.2. InOut Producer To enable InOut behavior append the exchangePattern attribute to the URI. By default it will use a dedicated TemporaryQueue for each consumer. from("direct:start") .to("sjms2:queue:bar?exchangePattern=InOut"); You can specify a namedReplyTo though which can provide a better monitor point. from("direct:start") .to("sjms2:queue:bar?exchangePattern=InOut&namedReplyTo=my.reply.to.queue"); 308.5. Consumer Usage 308.5.1. Durable Shared Subscription To create a durable subscription that can be shared between one or more consumers. Use a JMS 2.0 compliant connection factory and specify a common subscriptionId. Then set the subscription properties durable and shared to true. from("sjms2:topic:foo?consumerCount=3&subscriptionId=bar&durable=true&shared=true") .to("mock:result"); from("sjms2:topic:foo?consumerCount=2&subscriptionId=bar&durable=true&shared=true") .to("mock:result"); 308.5.2. InOnly Consumer - (Default) The InOnly consumer is the default Exchange behavior of the SJMS2 Consumer Endpoint. from("sjms2:queue:bar") .to("mock:result"); 308.5.3. InOut Consumer To enable InOut behavior append the exchangePattern attribute to the URI. from("sjms2:queue:in.out.test?exchangePattern=InOut") .transform(constant("Bye Camel")); 308.6. Advanced Usage Notes 308.6.1. Plugable Connection Resource Management SJMS2 provides JMS Connection resource management through built-in connection pooling. This eliminates the need to depend on third party API pooling logic. However there may be times that you are required to use an external Connection resource manager such as those provided by J2EE or OSGi containers. For this SJMS2 provides an interface that can be used to override the internal SJMS2 Connection pooling capabilities. This is accomplished through the ConnectionResource interface. The ConnectionResource provides methods for borrowing and returning Connections as needed is the contract used to provide Connection pools to the SJMS2 component. A user should use when it is necessary to integrate SJMS2 with an external connection pooling manager. It is recommended though that for standard ConnectionFactory providers you use the ConnectionFactoryResource implementation that is provided with SJMS2 as-is or extend as it is optimized for this component. Below is an example of using the plugable ConnectionResource with the ActiveMQ PooledConnectionFactory : public class AMQConnectionResource implements ConnectionResource { private PooledConnectionFactory pcf; public AMQConnectionResource(String connectString, int maxConnections) { super(); pcf = new PooledConnectionFactory(connectString); pcf.setMaxConnections(maxConnections); pcf.start(); } public void stop() { pcf.stop(); } @Override public Connection borrowConnection() throws Exception { Connection answer = pcf.createConnection(); answer.start(); return answer; } @Override public Connection borrowConnection(long timeout) throws Exception { // SNIPPED... } @Override public void returnConnection(Connection connection) throws Exception { // Do nothing since there isn't a way to return a Connection // to the instance of PooledConnectionFactory log.info("Connection returned"); } } Then pass in the ConnectionResource to the Sjms2Component : CamelContext camelContext = new DefaultCamelContext(); AMQConnectionResource pool = new AMQConnectionResource("tcp://localhost:33333", 1); Sjms2Component component = new Sjms2Component(); component.setConnectionResource(pool); camelContext.addComponent("sjms2", component); To see the full example of its usage please refer to the ConnectionResourceIT . 308.6.2. Session, Consumer, & Producer Pooling & Caching Management Coming soon ... 308.6.3. Batch Message Support The Sjms2Producer supports publishing a collection of messages by creating an Exchange that encapsulates a List . This Sjms2Producer will take then iterate through the contents of the List and publish each message individually. If when producing a batch of messages there is the need to set headers that are unique to each message you can use the SJMS2 BatchMessage class. When the Sjms2Producer encounters a BatchMessage list it will iterate each BatchMessage and publish the included payload and headers. Below is an example of using the BatchMessage class. First we create a list of BatchMessage : List<BatchMessage<String>> messages = new ArrayList<BatchMessage<String>>(); for (int i = 1; i <= messageCount; i++) { String body = "Hello World " + i; BatchMessage<String> message = new BatchMessage<String>(body, null); messages.add(message); } Then publish the list: template.sendBody("sjms2:queue:batch.queue", messages); 308.6.4. Customizable Transaction Commit Strategies (Local JMS Transactions only) SJMS2 provides a developer the means to create a custom and plugable transaction strategy through the use of the TransactionCommitStrategy interface. This allows a user to define a unique set of circumstances that the SessionTransactionSynchronization will use to determine when to commit the Session. An example of its use is the BatchTransactionCommitStrategy which is detailed further in the section. 308.6.5. Transacted Batch Consumers & Producers The SJMS2 component has been designed to support the batching of local JMS transactions on both the Producer and Consumer endpoints. How they are handled on each is very different though. The SJMS2 consumer endpoint is a straightforward implementation that will process X messages before committing them with the associated Session. To enable batched transaction on the consumer first enable transactions by setting the transacted parameter to true and then adding the transactionBatchCount and setting it to any value that is greater than 0. For example the following configuration will commit the Session every 10 messages: If an exception occurs during the processing of a batch on the consumer endpoint, the Session rollback is invoked causing the messages to be redelivered to the available consumer. The counter is also reset to 0 for the BatchTransactionCommitStrategy for the associated Session as well. It is the responsibility of the user to ensure they put hooks in their processors of batch messages to watch for messages with the JMSRedelivered header set to true. This is the indicator that messages were rolled back at some point and that a verification of a successful processing should occur. A transacted batch consumer also carries with it an instance of an internal timer that waits a default amount of time (5000ms) between messages before committing the open transactions on the Session. The default value of 5000ms (minimum of 1000ms) should be adequate for most use-cases but if further tuning is necessary simply set the transactionBatchTimeout parameter. The minimal value that will be accepted is 1000ms as the amount of context switching may cause unnecessary performance impacts without gaining benefit. The producer endpoint is handled much differently though. With the producer after each message is delivered to its destination the Exchange is closed and there is no longer a reference to that message. To make a available all the messages available for redelivery you simply enable transactions on a Producer Endpoint that is publishing BatchMessages. The transaction will commit at the conclusion of the exchange which includes all messages in the batch list. Nothing additional need be configured. For example: List<BatchMessage<String>> messages = new ArrayList<BatchMessage<String>>(); for (int i = 1; i <= messageCount; i++) { String body = "Hello World " + i; BatchMessage<String> message = new BatchMessage<String>(body, null); messages.add(message); } Now publish the List with transactions enabled: template.sendBody("sjms2:queue:batch.queue?transacted=true", messages); 308.7. Additional Notes 308.7.1. Message Header Format The SJMS2 Component uses the same header format strategy that is used in the Camel JMS Component. This plugable strategy ensures that messages sent over the wire conform to the JMS Message spec. For the exchange.in.header the following rules apply for the header keys: Keys starting with JMS or JMSX are reserved. exchange.in.headers keys must be literals and all be valid Java identifiers (do not use dots in the key name). Camel replaces dots & hyphens and the reverse when when consuming JMS messages: is replaced by DOT and the reverse replacement when Camel consumes the message. is replaced by HYPHEN and the reverse replacement when Camel consumes the message. See also the option jmsKeyFormatStrategy , which allows use of your own custom strategy for formatting keys. For the exchange.in.header , the following rules apply for the header values: 308.7.2. Message Content To deliver content over the wire we must ensure that the body of the message that is being delivered adheres to the JMS Message Specification. Therefore, all that are produced must either be primitives or their counter objects (such as Integer , Long , Character ). The types, String , CharSequence , Date , BigDecimal and BigInteger are all converted to their toString() representation. All other types are dropped. 308.7.3. Clustering When using InOut with SJMS2 in a clustered environment you must either use TemporaryQueue destinations or use a unique named reply to destination per InOut producer endpoint. Message correlation is handled by the endpoint, not with message selectors at the broker. The InOut Producer Endpoint uses Java Concurrency Exchangers cached by the Message JMSCorrelationID . This provides a nice performance increase while reducing the overhead on the broker since all the messages are consumed from the destination in the order they are produced by the interested consumer. Currently the only correlation strategy is to use the JMSCorrelationId . The InOut Consumer uses this strategy as well ensuring that all responses messages to the included JMSReplyTo destination also have the JMSCorrelationId copied from the request as well. 308.8. Transaction Support SJMS2 currently only supports the use of internal JMS Transactions. There is no support for the Camel Transaction Processor or the Java Transaction API (JTA). 308.8.1. Does Springless Mean I Can't Use Spring? Not at all. Below is an example of the SJMS2 component using the Spring DSL: <route id="inout.named.reply.to.producer.route"> <from uri="direct:invoke.named.reply.to.queue" /> <to uri="sjms2:queue:named.reply.to.queue?namedReplyTo=my.response.queue&amp;exchangePattern=InOut" /> </route> Springless refers to moving away from the dependency on the Spring JMS API. A new JMS client API is being developed from the ground up to power SJMS2.

Commands:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-sjms2</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency>
sjms2:[queue:|topic:]destinationName[?options]
sjms2:FOO.BAR
sjms2:queue:FOO.BAR
sjms2:topic:Stocks.Prices
sjms2:destinationType:destinationName
Sjms2Component component = new Sjms2Component(); component.setConnectionFactory(new ActiveMQConnectionFactory("tcp://localhost:61616")); getContext().addComponent("sjms2", component);
ConnectionFactoryResource connectionResource = new ConnectionFactoryResource(); connectionResource.setConnectionFactory(new ActiveMQConnectionFactory("tcp://localhost:61616")); connectionResource.setClientId("myclient-id"); Sjms2Component component = new Sjms2Component(); component.setConnectionResource(connectionResource); component.setMaxConnections(1);
from("direct:start") .to("sjms2:queue:bar");
from("direct:start") .to("sjms2:queue:bar?exchangePattern=InOut");
from("direct:start") .to("sjms2:queue:bar?exchangePattern=InOut&namedReplyTo=my.reply.to.queue");
from("sjms2:topic:foo?consumerCount=3&subscriptionId=bar&durable=true&shared=true") .to("mock:result"); from("sjms2:topic:foo?consumerCount=2&subscriptionId=bar&durable=true&shared=true") .to("mock:result");
from("sjms2:queue:bar") .to("mock:result");
from("sjms2:queue:in.out.test?exchangePattern=InOut") .transform(constant("Bye Camel"));
public class AMQConnectionResource implements ConnectionResource { private PooledConnectionFactory pcf; public AMQConnectionResource(String connectString, int maxConnections) { super(); pcf = new PooledConnectionFactory(connectString); pcf.setMaxConnections(maxConnections); pcf.start(); } public void stop() { pcf.stop(); } @Override public Connection borrowConnection() throws Exception { Connection answer = pcf.createConnection(); answer.start(); return answer; } @Override public Connection borrowConnection(long timeout) throws Exception { // SNIPPED } @Override public void returnConnection(Connection connection) throws Exception { // Do nothing since there isn't a way to return a Connection // to the instance of PooledConnectionFactory log.info("Connection returned"); } }
CamelContext camelContext = new DefaultCamelContext(); AMQConnectionResource pool = new AMQConnectionResource("tcp://localhost:33333", 1); Sjms2Component component = new Sjms2Component(); component.setConnectionResource(pool); camelContext.addComponent("sjms2", component);
List<BatchMessage<String>> messages = new ArrayList<BatchMessage<String>>(); for (int i = 1; i <= messageCount; i++) { String body = "Hello World " + i; BatchMessage<String> message = new BatchMessage<String>(body, null); messages.add(message); }
template.sendBody("sjms2:queue:batch.queue", messages);
sjms2:queue:transacted.batch.consumer?transacted=true&transactionBatchCount=10
sjms2:queue:transacted.batch.consumer?transacted=true&transactionBatchCount=10&transactionBatchTimeout=2000
List<BatchMessage<String>> messages = new ArrayList<BatchMessage<String>>(); for (int i = 1; i <= messageCount; i++) { String body = "Hello World " + i; BatchMessage<String> message = new BatchMessage<String>(body, null); messages.add(message); }
template.sendBody("sjms2:queue:batch.queue?transacted=true", messages);
<route id="inout.named.reply.to.producer.route"> <from uri="direct:invoke.named.reply.to.queue" /> <to uri="sjms2:queue:named.reply.to.queue?namedReplyTo=my.response.queue&amp;exchangePattern=InOut" /> </route>