6
Ho creato una semplice richiesta/risposta con Apache Camel e JMS. Tutto funziona correttamente: le chiamate vengono inviate al servizio lato server e i risultati vengono restituiti al client. Solo quando c'è un'eccezione sul lato server questa eccezione non verrà restituita al chiamante. L'eccezione appare sul server e il client riceve un timeout. Vorrei ricevere l'eccezione sul lato client.JMS Apache Camel - Eccezioni non restituite al chiamante con richiesta/risposta
Per quanto ho capito i documenti disponibili che quello che voglio dovrebbe essere il comportamento predefinito. Ho anche giocato con la clausola onException o impostando un'altra rotta per il back transfer ma tutto ciò non ha aiutato. Quindi la mia domanda è cosa mi manca nel mio setup per ottenere le eccezioni restituite al chiamante?
Ecco i dettagli (codice semplificato):
- La coda JMS per la comunicazione viene distribuito in un JBoss standalone (7.1.1.FINAL)
- JNDI viene utilizzato per cercare la fabbrica per creare connessioni alla coda
- il cliente è attualmente un webapplication Primavera in esecuzione in un molo
- il server è attualmente una semplice applicazione Java standalone configurato con molla versione
- Primavera 3.1.2.RELEASE
- Apache Camel 2.10.2
DTOs/Eccezione scambiati tra client e server:
public class RequestDTO implements Serializable {
String payload;
...
}
public class ResponseDTO implements Serializable {
String payload;
...
}
public class RmtServiceException extends Exception implements Serializable {
public RmtServiceException() {
super("Exception in service.");
}
}
interfaccia per il servizio di chiamata via JMS:
public interface RmtService {
ResponseDTO doSomething(RequestDTO request) throws RmtServiceException;
}
Implementazione per il servizio:
@Component("rmtService")
public class RmtServiceImpl implements RmtService {
public ResponseDTO doSomething(RequestDTO request) throws RmtServiceException {
// Return a ResponseDTO if processing is successful,
// otherwise throw an RmtServiceException
}
}
Cliente: configurazione
<bean id="remoteJndiTemplate" class="org.springframework.jndi.JndiTemplate">
<property name="environment">
<props>
<prop key="java.naming.factory.initial">org.jboss.naming.remote.client.InitialContextFactory</prop>
<prop key="java.naming.provider.url">remote://localhost:4447</prop>
<prop key="java.naming.security.principal">JNDI_USER</prop>
<prop key="java.naming.security.credentials">JNDI_PASSWORD</prop>
</props>
</property>
</bean>
<bean id="remoteJmsConnectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiTemplate" ref="remoteJndiTemplate"/>
<property name="jndiName" value="jms/RemoteConnectionFactory"/>
</bean>
<bean id="authenticatedJmsConnectionFactory" class="org.springframework.jms.connection.UserCredentialsConnectionFactoryAdapter">
<property name="targetConnectionFactory" ref="remoteJmsConnectionFactory"/>
<property name="username" value="JMS_USER"/>
<property name="password" value="JMS_PASSWORD"/>
</bean>
<bean name="hq" class="org.apache.camel.component.jms.JmsComponent">
<property name="connectionFactory" ref="authenticatedJmsConnectionFactory"/>
</bean>
<camel:camelContext id="APIContext" autoStartup="true">
<camel:endpoint id="queue" uri="hq:queue:test.queue"/>
</camel:camelContext>
<camel:proxy
id="rmtServiceProxy"
serviceInterface="RmtService"
serviceUrl="hq:queue:test.queue"/>
Server:
<bean id="remoteJndiTemplate" class="org.springframework.jndi.JndiTemplate">
<property name="environment">
<props>
<prop key="java.naming.factory.initial">org.jboss.naming.remote.client.InitialContextFactory</prop>
<prop key="java.naming.provider.url">remote://localhost:4447</prop>
<prop key="java.naming.security.principal">JNDI_USER</prop>
<prop key="java.naming.security.credentials">JNDI_PASSWORD</prop>
</props>
</property>
</bean>
<bean id="remoteJmsConnectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiTemplate" ref="remoteJndiTemplate"/>
<property name="jndiName" value="jms/RemoteConnectionFactory"/>
</bean>
<bean id="authenticatedJmsConnectionFactory" class="org.springframework.jms.connection.UserCredentialsConnectionFactoryAdapter">
<property name="targetConnectionFactory" ref="remoteJmsConnectionFactory"/>
<property name="username" value="JMS_USER"/>
<property name="password" value="JMS_PASSWORD"/>
</bean>
<bean name="hq" class="org.apache.camel.component.jms.JmsComponent">
<property name="connectionFactory" ref="authenticatedJmsConnectionFactory"/>
</bean>
<camel:camelContext id="APIContext" autoStartup="true">
<camel:endpoint id="queue" uri="hq:queue:test.queue"/>
<camel:route>
<camel:from ref="queue"/>
<camel:to uri="bean:rmtService"/>
</camel:route>
</camel:camelContext>
comportamento osservato quando c'è un'eccezione sul lato server:
Nel Server registra il seguente output appare:
ERROR: org.apache.camel.processor.DefaultErrorHandler - Failed delivery for (MessageId: ID-XXX-49296-1352104153517-0-8 on ExchangeId: ID-XXX-49296-1352104153517-0-7). Exhausted after delivery attempt: 1 caught: org.apache.camel.RuntimeCamelException: RmtServiceException: Exception in service.
org.apache.camel.RuntimeCamelException: RmtServiceException: Exception in service.
at org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException(ObjectHelper.java:1270)
at org.apache.camel.component.bean.BeanInvocation.invoke(BeanInvocation.java:87)
at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:130)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:99)
at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:73)
at org.apache.camel.impl.ProcessorEndpoint.onExchange(ProcessorEndpoint.java:101)
at org.apache.camel.impl.ProcessorEndpoint$1.process(ProcessorEndpoint.java:71)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.SendProcessor$2.doInAsyncProducer(SendProcessor.java:122)
at org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:298)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:117)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:73)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:91)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:334)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:220)
at org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.processor.interceptor.DefaultChannel.process(DefaultChannel.java:303)
at org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:150)
at org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:117)
at org.apache.camel.processor.RouteInflightRepositoryProcessor.processNext(RouteInflightRepositoryProcessor.java:48)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:73)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:86)
at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:104)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:562)
at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:500)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:468)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:326)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:264)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1071)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1063)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:960)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Caused by: RmtServiceException: Exception in service.
at RmtServiceImpl.doSomething(...)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.camel.component.bean.BeanInvocation.invoke(BeanInvocation.java:83)
... 48 more
WARN : org.apache.camel.component.jms.EndpointMessageListener - Execution of JMS message listener failed. Caused by: [org.apache.camel.RuntimeCamelException - RmtServiceException: Exception in service.]
... (Same stacktrace again)
e il cliente riceve un timeout: Così ancora una volta
WARN : org.apache.camel.component.jms.reply.TemporaryQueueReplyManager - Timeout occurred after 20000 millis waiting for reply message with correlationID [ID-XXX-49307-1352104250851-0-13]. Setting ExchangeTimedOutException on (MessageId: ID-XXX-49307-1352104250851-0-15 on ExchangeId: ID-XXX-49307-1352104250851-0-14) and continue routing.
2012-11-05 10:03:11.964:WARN:oejs.ServletHandler:/app/some/action
java.lang.reflect.UndeclaredThrowableException
at $Proxy45.doSomething(Unknown Source)
at ...
Caused by:
org.apache.camel.ExchangeTimedOutException: The OUT message was not received within: 20000 millis due reply message with correlationID: ID-XXX-49307-1352104250851-0-13 not received. Exchange[Message: BeanInvocation public abstract ResponseDTO RmtService.doSomething(RequestDTO) throws RmtServiceException with [[email protected]]]]
at org.apache.camel.component.jms.reply.ReplyManagerSupport.processReply(ReplyManagerSupport.java:133)
at org.apache.camel.component.jms.reply.TemporaryQueueReplyHandler.onTimeout(TemporaryQueueReplyHandler.java:61)
at org.apache.camel.component.jms.reply.CorrelationTimeoutMap.onEviction(CorrelationTimeoutMap.java:53)
at org.apache.camel.component.jms.reply.CorrelationTimeoutMap.onEviction(CorrelationTimeoutMap.java:30)
at org.apache.camel.support.DefaultTimeoutMap.purge(DefaultTimeoutMap.java:203)
at org.apache.camel.support.DefaultTimeoutMap.run(DefaultTimeoutMap.java:159)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
: Tutto il resto funziona come previsto, solo le eccezioni non vengono restituiti al chiamante. Qualsiasi aiuto su questo è molto apprezzato! Grazie in anticipo.
Grande, ha trascurato questa opzione. Grazie! – lost