为什么我使用Spring Integration / JtaTransactionManager看到多个事务

时间：2014-04-08 19:32:06

标签： java spring spring-integration distributed-transactions atomikos

我正在开发一个使用Spring Integration框架和atomikos为分布式事务构建的项目。最近我们一直在尝试运行集成测试来验证消息是否正确地通过我们的系统发送。执行其中一个集成测试时，我注意到我们收到10条日志消息，表明正在创建新事务，10条日志消息表示事务提交。

每次将消息从通道传递到端点时，Spring是否会创建新事务，反之亦然？

下面的代码接受消息驱动通道适配器上的消息（使用transactionManager）并发送到路由器。然后，路由器将消息发送到包含转换器，服务激活器（带有retryAdvice）和出站消息适配器的链。

AFAIK，我应该看到当我们的消息驱动通道适配器从队列接收到msg时创建了一个事务，然后在完成处理消息时提交。所以我认为总共会有3笔交易。一个来自在测试中发送消息，一个来自入站适配器，另一个来自在测试中接收消息。

来自spring-datasource.xml的

<bean id="transactionManager"
      class="org.springframework.transaction.jta.JtaTransactionManager">
    <property name="transactionManager" ref="AtomikosTransactionManager" />
    <property name="userTransaction" ref="AtomikosUserTransaction" />
</bean>
来自spring-context.xml的

<jms:message-driven-channel-adapter
        id="inventoryQueue_inbound_adapter"
        destination-name="queue.inventory"
        channel="InventoryRouterChannel"
        error-channel="inventoryErrorChannel"
        transaction-manager="transactionManager"
        acknowledge="transacted"/>

<integration:router input-channel="InventoryRouterChannel">
    <bean class="com.inventory.InventoryRouter"/>
</integration:router>

<integration:chain input-channel="rxAddToCountWell">
    <integration:json-to-object-transformer type="com.events.RxAddToCountWell"/>
    <integration:service-activator ref="addToCountWellHandler" method="formatCountwellMessage">
        <integration:request-handler-advice-chain>
            <ref bean="retryAdvice"/>
        </integration:request-handler-advice-chain>
    </integration:service-activator>
    <jms:outbound-channel-adapter destination-name="OUTBOUND.QUEUE"/>
</integration:chain>

<bean id="retryAdvice" class="org.springframework.integration.handler.advice.RequestHandlerRetryAdvice">
    <property name="recoveryCallback">
        <bean class="org.springframework.integration.handler.advice.ErrorMessageSendingRecoverer">
            <constructor-arg ref="inventoryErrorChannel"/>
        </bean>
    </property>
    <property name="retryTemplate">
        <bean class="org.springframework.retry.support.RetryTemplate">
            <property name="retryPolicy">
                <bean class="org.springframework.retry.policy.SimpleRetryPolicy">
                    <property name="maxAttempts" value="2"/>
                </bean>
            </property>
            <property name="backOffPolicy">
                <bean class="org.springframework.retry.backoff.ExponentialBackOffPolicy">
                    <property name="initialInterval" value="1000"/>
                    <property name="multiplier" value="2"/>
                </bean>
            </property>
        </bean>
    </property>
</bean>

消息端点 

@MessageEndpoint
public class AddToCountWellHandler {

    public static final Logger logger = Logger.getLogger(AddToCountWellHandler.class);

    public Message<String> formatCountwellMessage(RxAddToCountWell payload) {
        //our logic here
        //...
        return MessageBuilder.withPayload(temp).build();
    }
}

测试方法 

@Test
@DirtiesContext
public void addToCountWellIntegrationTest() throws InterruptedException, SystemException, NotSupportedException, HeuristicRollbackException, HeuristicMixedException, RollbackException {

    // Send the message to the handler
    transactionManager.getTransactionManager().begin();
    jmsTemplate.send("queue.inventory", new MessageCreator() {
        @Override
        public Message createMessage(Session session) throws JMSException {
            TextMessage message;
            try {
                message = session.createTextMessage(getJson("./doc/event_json_examples/inventory/rxAddToCountWell.json"));
            } catch (Exception e) {
                //...
            }
            message.setJMSType("rxAddToCountWell");
            return message;
        }
    });
    transactionManager.getTransactionManager().commit();

    transactionManager.getTransactionManager().begin();

    //verify that it was placed on the queue
    TextMessage output = (TextMessage) jmsTemplate.receive(COUNTWELL_QUEUE_NAME);
    assertNotNull(output);

    transactionManager.getTransactionManager().commit();
    appContext.close();
}

日志 

2014-04-08 13:55:35,018 [INFO ] org.springframework.transaction.jta.JtaTransactionManager - Using JTA UserTransaction: com.atomikos.icatch.jta.UserTransactionImp@188c838 (org.springframework.transaction.jta.JtaTransactionManager.checkUserTransactionAndTransactionManager(JtaTransactionManager.java:471))
2014-04-08 13:55:35,019 [INFO ] org.springframework.transaction.jta.JtaTransactionManager - Using JTA TransactionManager: com.atomikos.icatch.jta.UserTransactionManager@111089b (org.springframework.transaction.jta.JtaTransactionManager.checkUserTransactionAndTransactionManager(JtaTransactionManager.java:482))
2014-04-08 13:55:36,172 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#2]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:36,171 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#0]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:36,172 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#4]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:36,172 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#3]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:36,171 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#1]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:37,619 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:37,631 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#2]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:38,656 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:38,658 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#0]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:39,667 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:39,670 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#4]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:40,705 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:40,706 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#1]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:40,748 [DEBUG] com.inventory.InventoryRouter - Routing jms_type: rxAddToCountWell (com.inventory.InventoryRouter.route(InventoryRouter.java:25))
2014-04-08 13:55:40,834 [DEBUG] org.springframework.retry.support.RetryTemplate - Retry: count=0 (org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:251))
2014-04-08 13:55:40,835 [DEBUG] com.inventory.AddToCountWellHandler - Entered formatCountwellMessage... (com.inventory.AddToCountWellHandler.formatCountwellMessage(AddToCountWellHandler.java:31))
2014-04-08 13:55:41,179 [DEBUG] com.inventory.AddToCountWellHandler - Leaving formatCountwellMessage (com.inventory.AddToCountWellHandler.formatCountwellMessage(AddToCountWellHandler.java:38))
2014-04-08 13:55:41,190 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:41,193 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#3]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 13:55:43,396 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:44,406 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:45,422 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:46,448 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 13:55:47,453 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))

2 个答案:

答案 0 :(得分：1)

我已经确定了发生了什么。当我加载测试上下文配置时，我正在加载一个导入所有5个消息驱动通道适配器的文件。正如Gary所说，每个空闲线程必须启动一个事务。所以适配器都启动了事务，但只有一个实际收到了消息。

我发现修改我的测试上下文只加载特定的适配器/路由导致只使用了单个线程。

2014-04-08 17:16:38,322 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#0]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 17:16:38,492 [DEBUG] com.inventory.InventoryRouter - Routing jms_type: rxAddToCountWell (com.inventory.InventoryRouter.route(InventoryRouter.java:25))
2014-04-08 17:16:38,555 [DEBUG] org.springframework.retry.support.RetryTemplate - Retry: count=0 (org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:251))
2014-04-08 17:16:38,595 [DEBUG] com.inventory.AddToCountWellHandler - Entered formatCountwellMessage... (com.inventory.AddToCountWellHandler.formatCountwellMessage(AddToCountWellHandler.java:31))
2014-04-08 17:16:42,198 [DEBUG] com.inventory.AddToCountWellHandler - Leaving formatCountwellMessage (com.inventory.AddToCountWellHandler.formatCountwellMessage(AddToCountWellHandler.java:38))
2014-04-08 17:16:42,205 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))
2014-04-08 17:16:42,210 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Creating new transaction with name [org.springframework.jms.listener.DefaultMessageListenerContainer#0]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:366))
2014-04-08 17:16:43,219 [DEBUG] org.springframework.transaction.jta.JtaTransactionManager - Initiating transaction commit (org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:753))

答案 1 :(得分：0)

它与您的配置不匹配，但看起来您有5个侦听线程（#0..#4）。当#3处理消息时，其中4个执行无操作事务（无消息接收）。空闲线程必须在接收之前启动事务“以防万一”有消息。

由于这些线程没有完成任务，因此提交应该是轻量级的;您可以增加接收超时以最小化此操作，但代价是关闭容器可能需要更长时间（因为线程在JMS客户端库中被阻止）。

默认receiveTimeout为1秒。

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