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From kennystone <kenny.st...@yahoo.com>
Subject Message Router
Date Wed, 23 Apr 2008 02:23:30 GMT

Hello all,

I'm fairly new to activemq and camel.  I am trying to get the simple example
working with the message router. I changed the output queue to TEST.FOOT and
am trying to route to it.

Question 1: Why does my routing logic produce an error?

This works fine:
  <camelContext id="camel"
xmlns="http://activemq.apache.org/camel/schema/spring">
    <route>
      <from uri="activemq:TEST.FOO"/>
      <to uri="activemq:TEST.FOOT"/>
    </route>
</camelContext>

But when I try to put in routing logic, I get an error.
<camelContext id="camel"
xmlns="http://activemq.apache.org/camel/schema/spring">
  <route>
    <from uri="activemq:TEST.FOO"/>
    <choice>
      <when>
        <predicate>
          <header name="foo"/>
          <isEqualTo value="bar"/>
        </predicate>
        <to uri="activemq:TEST.FOOT"/>
      </when>
    </choice>
  </route>
</camelContext>


ERROR: java.lang.RuntimeException: Failed to execute start task. Reason:
org.apache.camel.RuntimeCam
elException: java.lang.NullPointerException
java.lang.RuntimeException: Failed to execute start task. Reason:
org.apache.camel.RuntimeCamelExcep
tion: java.lang.NullPointerException  (full error at the end)

Question 2:
I'm using activemq-cpp.  How do I actually get the header name and value
pair from the routing logic (foo/bar) into my message?  Is it
setStringProperty?

Thanks,

Kenny


Full error from the routing logic: 
ERROR: java.lang.RuntimeException: Failed to execute start task. Reason:
org.apache.camel.RuntimeCam
elException: java.lang.NullPointerException
java.lang.RuntimeException: Failed to execute start task. Reason:
org.apache.camel.RuntimeCamelExcep
tion: java.lang.NullPointerException
        at
org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:99)
        at
org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:51)
        at
org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:104)
        at
org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:51)
        at
org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:76)
        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.activemq.console.Main.runTaskClass(Main.java:222)
        at org.apache.activemq.console.Main.main(Main.java:106)
Caused by: org.apache.camel.RuntimeCamelException:
java.lang.NullPointerException
        at
org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:98)

        at
org.springframework.context.event.SimpleApplicationEventMulticaster$1.run(SimpleApplicati
onEventMulticaster.java:77)
        at
org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:49)
        at
org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(Simple
ApplicationEventMulticaster.java:75)
        at
org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractAppli
cationContext.java:246)
        at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicatio
nContext.java:355)
        at
org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicati
onContext.java:64)
        at
org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicati
onContext.java:52)
        at
org.apache.activemq.xbean.XBeanBrokerFactory.createApplicationContext(XBeanBrokerFactory.
java:91)
        at
org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java:51)
        at
org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:71)
        at
org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:54)
        at
org.apache.activemq.console.command.StartCommand.startBroker(StartCommand.java:112)
        at
org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:74)
        ... 10 more
Caused by: java.lang.NullPointerException
        at
org.apache.camel.model.ExpressionNode.createFilterProcessor(ExpressionNode.java:96)
        at org.apache.camel.model.WhenType.createProcessor(WhenType.java:49)
        at
org.apache.camel.model.ChoiceType.createProcessor(ChoiceType.java:61)
        at
org.apache.camel.model.ProcessorType.makeProcessor(ProcessorType.java:882)
        at
org.apache.camel.model.ProcessorType.addRoutes(ProcessorType.java:87)
        at org.apache.camel.model.RouteType.addRoutes(RouteType.java:182)
        at org.apache.camel.model.RouteType.addRoutes(RouteType.java:80)
        at org.apache.camel.model.RouteType.addRoutes(RouteType.java:71)
        at
org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:
449)
        at
org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:441)
        at
org.apache.camel.spring.SpringCamelContext.doStart(SpringCamelContext.java:140)
        at
org.apache.camel.impl.ServiceSupport.start(ServiceSupport.java:51)
        at
org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:96)

        ... 23 more
ERROR: java.lang.Exception: org.apache.camel.RuntimeCamelException:
java.lang.NullPointerException
java.lang.Exception: org.apache.camel.RuntimeCamelException:
java.lang.NullPointerException
        at
org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:100)
        at
org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:51)
        at
org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:104)
        at
org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:51)
        at
org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:76)
        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.activemq.console.Main.runTaskClass(Main.java:222)
        at org.apache.activemq.console.Main.main(Main.java:106)
Caused by: org.apache.camel.RuntimeCamelException:
java.lang.NullPointerException
        at
org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:98)

        at
org.springframework.context.event.SimpleApplicationEventMulticaster$1.run(SimpleApplicati
onEventMulticaster.java:77)
        at
org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:49)
        at
org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(Simple
ApplicationEventMulticaster.java:75)
        at
org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractAppli
cationContext.java:246)
        at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicatio
nContext.java:355)
        at
org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicati
onContext.java:64)
        at
org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicati
onContext.java:52)
        at
org.apache.activemq.xbean.XBeanBrokerFactory.createApplicationContext(XBeanBrokerFactory.
java:91)
        at
org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java:51)
        at
org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:71)
        at
org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:54)
        at
org.apache.activemq.console.command.StartCommand.startBroker(StartCommand.java:112)
        at
org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:74)
        ... 10 more
Caused by: java.lang.NullPointerException
        at
org.apache.camel.model.ExpressionNode.createFilterProcessor(ExpressionNode.java:96)
        at org.apache.camel.model.WhenType.createProcessor(WhenType.java:49)
        at
org.apache.camel.model.ChoiceType.createProcessor(ChoiceType.java:61)
        at
org.apache.camel.model.ProcessorType.makeProcessor(ProcessorType.java:882)
        at
org.apache.camel.model.ProcessorType.addRoutes(ProcessorType.java:87)
        at org.apache.camel.model.RouteType.addRoutes(RouteType.java:182)
        at org.apache.camel.model.RouteType.addRoutes(RouteType.java:80)
        at org.apache.camel.model.RouteType.addRoutes(RouteType.java:71)
        at
org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:
449)
        at
org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:441)
        at
org.apache.camel.spring.SpringCamelContext.doStart(SpringCamelContext.java:140)
        at
org.apache.camel.impl.ServiceSupport.start(ServiceSupport.java:51)
        at
org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:96)

        ... 23 more



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