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https://issues.apache.org/jira/browse/CAMEL-9110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14731856#comment-14731856
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Claus Ibsen commented on CAMEL-9110:
------------------------------------
As you use direct component then you can use its block option to wait until the
consumer is ready a bit later.
> Camel not fully ready before needed in another bean's init
> ----------------------------------------------------------
>
> Key: CAMEL-9110
> URL: https://issues.apache.org/jira/browse/CAMEL-9110
> Project: Camel
> Issue Type: Bug
> Components: camel-core
> Affects Versions: 2.14.1
> Environment: MacOS
> java version "1.7.0_51"
> Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
> Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
> Reporter: Roy Truelove
>
> (Can reproduce using this repo: https://github.com/roytruelove/camelBug)
> I have:
> * An interface {{ExternalService}} which I've proxied using {{camel:proxy}},
> pointing to {{direct:start}}.
> * A class {{UsesExternalServiceDuringInit}} into which the proxy is injected.
> During its Spring {{afterPropertiesSet()}} initialization method, the proxy
> is used.
> * A route which defines the {{direct:start}} endpoint.
> The full stack trace can be found below, but the core error that I get when
> starting Spring is
> {code}
> No consumers available on endpoint: Endpoint[direct://start].
> Exchange[Message: BeanInvocation public abstract java.lang.String
> org.apache.camel.example.spring.ExternalService.someMethodOnExternalService()
> with null]]
> {code}
> What it looks like is happening (and feel free to correct!) is:
> * Because {{UsesExternalServiceDuringInit}} depends on the {{camel}} bean,
> {{afterPropertiesSet()}} is called on {{SpringCamelContext}}, but this does
> not start the routes.
> * {{afterPropertiesSet()}} is called on {{UsesExternalServiceDuringInit}},
> expecting its instance of {{ExternalService}} to be ready to use.
> * The routes are not started, so {{direct:start}} is not yet consuming and
> the init fails.
> From what I see the starting of the routes happens once the spring context is
> fully initialized, meaning that any calls to the proxy during spring's init
> will fail.
> BTW I've tried this without a proxy, simply using a ProducerTemplate with the
> same issue.
> I don't yet have an idea for a fix / workaround - will update if I find one.
> Full stack trace if needed:
> {code}
> java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at org.apache.camel.maven.RunMojo$1.run(RunMojo.java:488)
> at java.lang.Thread.run(Thread.java:744)
> Caused by: org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name
> 'org.apache.camel.example.spring.UsesExternalServiceDuringInit#0' defined in
> file
> [/Users/roytruelove/src/personal/camel-bugfix2/target/classes/META-INF/spring/camel-context.xml]:
> Invocation of init method failed; nested exception is
> java.lang.reflect.UndeclaredThrowableException
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1514)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
> at
> org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
> at
> org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
> at
> org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
> at
> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191)
> at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:636)
> at
> org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:934)
> at
> org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
> at
> org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
> at
> org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
> at
> org.apache.camel.spring.Main.createDefaultApplicationContext(Main.java:217)
> at org.apache.camel.spring.Main.doStart(Main.java:157)
> at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
> at org.apache.camel.main.MainSupport.run(MainSupport.java:149)
> at org.apache.camel.main.MainSupport.run(MainSupport.java:353)
> at org.apache.camel.spring.Main.main(Main.java:90)
> ... 6 more
> Caused by: java.lang.reflect.UndeclaredThrowableException
> at com.sun.proxy.$Proxy45.someMethodOnExternalService(Unknown Source)
> at
> org.apache.camel.example.spring.UsesExternalServiceDuringInit.afterPropertiesSet(UsesExternalServiceDuringInit.java:11)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1573)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1511)
> ... 23 more
> Caused by:
> org.apache.camel.component.direct.DirectConsumerNotAvailableException: No
> consumers available on endpoint: Endpoint[direct://start]. Exchange[Message:
> BeanInvocation public abstract java.lang.String
> org.apache.camel.example.spring.ExternalService.someMethodOnExternalService()
> with null]]
> at
> org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:38)
> at
> org.apache.camel.component.bean.AbstractCamelInvocationHandler$1.call(AbstractCamelInvocationHandler.java:110)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> org.apache.camel.component.bean.AbstractCamelInvocationHandler.invokeWithBody(AbstractCamelInvocationHandler.java:128)
> at
> org.apache.camel.component.bean.CamelInvocationHandler.doInvokeProxy(CamelInvocationHandler.java:45)
> at
> org.apache.camel.component.bean.AbstractCamelInvocationHandler.invoke(AbstractCamelInvocationHandler.java:82)
> ... 27 more
> {code}
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