[CAMEL-15793] MethodNotFoundException when calling method on OSGi service reference in Blueprint

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.5.0, 3.4.4, 3.6.0
• Fix Version/s: 3.4.5, 3.7.0
• Component/s: karaf, osgi
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Josh Smith
• Created: 02/Nov/20 19:23
• Updated: 03/Nov/20 07:42
• Resolved: 03/Nov/20 07:41

Description

Camel throws an exception when trying to call a method on an OSGi service reference in Blueprint. For example:

 

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0">
  <reference id="helloWorldServiceRef" interface="com.example.HelloWorldService"/>
  <camelContext xmlns="http://camel.apache.org/schema/blueprint" id="simple">
    <route>
      <from uri="timer:simple?period=5000"/>
      <setBody>
        <method ref="helloWorldServiceRef" method="greet()"/>
      </setBody>
      <to uri="log:simplecamel"/>
    </route>
  </camelContext>
</blueprint>

Here's the exception thrown:

org.apache.camel.FailedToCreateRouteException: Failed to create route route1 at: >>> SetBody[bean[ref:helloWorldServiceRef method:greet()]] <<< in route: Route(route1)[From[timer:simple?period=5000] -> [SetBody[bea... because of Method with name: greet() not found on bean: com.example.HelloWorldServiceImpl@604598c3 of type: Proxy7236e8f2_c140_49c7_a040_ac2eddfcda95
	at org.apache.camel.reifier.RouteReifier.doCreateRoute(RouteReifier.java:384) ~[?:?]
	at org.apache.camel.reifier.RouteReifier.createRoute(RouteReifier.java:111) ~[?:?]
	at org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:431) ~[?:?]
	at org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:393) ~[?:?]
	at org.apache.camel.impl.engine.AbstractCamelContext.doInit(AbstractCamelContext.java:2606) ~[!/:3.6.0]
	at org.apache.camel.support.service.BaseService.init(BaseService.java:83) ~[!/:3.6.0]
	at org.apache.camel.impl.engine.AbstractCamelContext.init(AbstractCamelContext.java:2378) ~[!/:3.6.0]
	at org.apache.camel.support.service.BaseService.start(BaseService.java:111) ~[!/:3.6.0]
	at org.apache.camel.impl.engine.AbstractCamelContext.start(AbstractCamelContext.java:2395) ~[!/:3.6.0]
	at org.apache.camel.blueprint.BlueprintCamelContext.start(BlueprintCamelContext.java:241) ~[!/:3.6.0]
	at org.apache.camel.blueprint.BlueprintCamelContext.maybeStart(BlueprintCamelContext.java:283) ~[!/:3.6.0]
	at org.apache.camel.blueprint.BlueprintCamelContext.blueprintEvent(BlueprintCamelContext.java:187) [!/:3.6.0]
	at org.apache.aries.blueprint.container.BlueprintEventDispatcher$3.call(BlueprintEventDispatcher.java:190) [!/:1.10.2]
	at org.apache.aries.blueprint.container.BlueprintEventDispatcher$3.call(BlueprintEventDispatcher.java:188) [!/:1.10.2]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_242]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_242]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_242]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_242]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_242]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_242]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_242]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_242]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_242]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]
Caused by: org.apache.camel.component.bean.MethodNotFoundException: Method with name: greet() not found on bean: com.example.HelloWorldServiceImpl@604598c3 of type: Proxy7236e8f2_c140_49c7_a040_ac2eddfcda95
	at org.apache.camel.language.bean.BeanExpression.validateHasMethod(BeanExpression.java:268) ~[?:?]
	at org.apache.camel.language.bean.BeanExpression.init(BeanExpression.java:164) ~[?:?]
	at org.apache.camel.language.bean.BeanLanguage.createExpression(BeanLanguage.java:173) ~[?:?]
	at org.apache.camel.reifier.language.MethodCallExpressionReifier.createExpression(MethodCallExpressionReifier.java:57) ~[?:?]
	at org.apache.camel.reifier.language.ExpressionReifier.createExpression(ExpressionReifier.java:135) ~[?:?]
	at org.apache.camel.reifier.AbstractReifier.createExpression(AbstractReifier.java:113) ~[?:?]
	at org.apache.camel.reifier.SetBodyReifier.createProcessor(SetBodyReifier.java:34) ~[?:?]
	at org.apache.camel.reifier.ProcessorReifier.makeProcessor(ProcessorReifier.java:752) ~[?:?]
	at org.apache.camel.reifier.ProcessorReifier.addRoutes(ProcessorReifier.java:495) ~[?:?]
	at org.apache.camel.reifier.RouteReifier.doCreateRoute(RouteReifier.java:382) ~[?:?]
	... 23 more

This bug was introduced by this change: https://github.com/apache/camel/commit/47d8ff92de888d923a7f3734080aa5a6d3d5bbcc#diff-d57c2c1fc8e674a5764e3fbe2cdc565dc12ca07541b9d6a2d9345f6c46a3d2e5R97-R107

The service reference has a class of Proxy7236e8f2_c140_49c7_a040_ac2eddfcda95 (see the stack trace), which is a synthetic class, so the type for the BeanInfo is set to its superclass, which in this case is java.lang.Object.

Issue Links

• is related to: CAMEL-15435 MethodNotFoundException on OSGi service bean
• is related to: CAMEL-15623 osgi - Reference methods not found in blueprint context