org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: null due to

http://mail-archives.apache.org/mod_mbox/camel-dev/201102.mbox/[e-mail]%3E

interceptFrom and from(Endpoint) don't work together
----------------------------------------------------

                 Key: CAMEL-3709
                 URL: https://issues.apache.org/jira/browse/CAMEL-3709
             Project: Camel
          Issue Type: Bug
          Components: camel-core
    Affects Versions: 2.5.0
            Reporter: Søren Markert
            Priority: Minor

When using interceptFrom(String) together with from(Endpoint), the below Exception occurs
during the routes building process. Looking at RoutesDefinition.java:217 reveals, that the
FromDefintion just created has no URI. That causes the comparison to all the interceptFroms'
URIs to fail. As far as I can tell, the way to fix this would be to add {{setUri(myEndpoint.getEndpointUri())}}
in the constructor {{FromDefinition(Endpoint endpoint)}}.

Below the stack trace, there is a unit test that demonstrates the issue. Until it if fixed,
it can be easily circumvented by adding the commented-out line, and then change to {{from("myEndpoint")}}.
{code}
org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: null due to:
null
 at org.apache.camel.util.EndpointHelper.matchEndpoint(EndpointHelper.java:109)
 at org.apache.camel.model.RoutesDefinition.route(RoutesDefinition.java:217)
 at org.apache.camel.model.RoutesDefinition.from(RoutesDefinition.java:167)
 at org.apache.camel.builder.RouteBuilder.from(RouteBuilder.java:101)
 at dk.mobilethink.adc2.endpoint.UnsetUriTest$1.configure(UnsetUriTest.java:18)
 at org.apache.camel.builder.RouteBuilder.checkInitialized(RouteBuilder.java:318)
 at org.apache.camel.builder.RouteBuilder.configureRoutes(RouteBuilder.java:273)
 at org.apache.camel.builder.RouteBuilder.addRoutesToCamelContext(RouteBuilder.java:259)
 at org.apache.camel.impl.DefaultCamelContext.addRoutes(DefaultCamelContext.java:612)
 at org.apache.camel.test.CamelTestSupport.setUp(CamelTestSupport.java:111)
 at junit.framework.TestCase.runBare(TestCase.java:132)
 at org.apache.camel.test.TestSupport.runBare(TestSupport.java:65)
 at junit.framework.TestResult$1.protect(TestResult.java:110)
 at junit.framework.TestResult.runProtected(TestResult.java:128)
 at junit.framework.TestResult.run(TestResult.java:113)
 at junit.framework.TestCase.run(TestCase.java:124)
 at junit.framework.TestSuite.runTest(TestSuite.java:232)
 at junit.framework.TestSuite.run(TestSuite.java:227)
 at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.NullPointerException
 at org.apache.camel.util.UnsafeUriCharactersEncoder.encode(UnsafeUriCharactersEncoder.java:56)
 at org.apache.camel.util.URISupport.normalizeUri(URISupport.java:162)
 at org.apache.camel.util.EndpointHelper.matchEndpoint(EndpointHelper.java:107)
 ... 24 more
{code}

{code}
package dk.mobilethink.adc2.endpoint;

import org.apache.camel.Endpoint;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.test.CamelTestSupport;

public class UnsetUriTest extends CamelTestSupport {
 @Override
 protected RouteBuilder createRouteBuilder() throws Exception {

  return new RouteBuilder() {
   public void configure() throws Exception {
    interceptFrom("URI1").to("irrelevantURI");

    Endpoint myEndpoint = getContext().getComponent("direct").createEndpoint("ignoredURI");
    
//    getContext().addEndpoint("myEndpoint", myEndpoint);
    from(myEndpoint)
     .inOnly("log:foo");
   }
  };
 }

 public void testNothing() { }
}
{code}

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=================

if we want to use uri in interceptfrom

<camel:interceptFrom uri="xxx">
   <camel:bean ref="xxx" method="xxx"></camel:bean>
</camel:interceptFrom>

 

we must make surei there isn't any route like:

<route id="xxx" startupOrder="1">
   <from ref="xxx" />
   <to uri="xxx" />
</route>

 

we should change it to

<route id="xxx" startupOrder="1"
>
   <from uri="xxx" />
   <to uri="xxx" />
</route>

 

=============

 

interceptFrom & ref

 

http://camel.465427.n5.nabble.com/interceptFrom-amp-ref-td4283865.html

I guess would be logically correct to include such an attribute to refer to the endpoints instead of copy/pasting of URIs.

The source code has a TODO in there about that, so yeah its a known
issue that interceptXXX uses uris. However you can always use
"ref:xxx" to refer to an endpoint by its id, in the uri. So that
should work. Its just that the we dont have interceptXXXRef to
indicate it expect a reference.