Details
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Bug
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Status: Resolved
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Major
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Resolution: Invalid
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None
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None
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Open JDK 11.0.2
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Unknown
Description
Recently we upgraded our Application's overall camel version from 2.16.0 to 3.4.4. We are using several camel components in our applications such as:
camel-jms, camel-restlet, camel-restlet, cale-zookeeper, camel-file, camel-rest, etc...
One of the component we used in our Application was camel-restlet component (version 2.16.0) where after migration to camel 3.x, we are facing issue in service start-up.
Issue #1 : It seems camel removed the restlet component after 3.x. Could not find much documentation which would let us know how to migrate the existing camel-restlet component
Issue #2 : We gave a try to upgrade the camel-restlet component to 3.0.0-RC2. But during start-up of our service, we faced an error as mentioned in the below stack trace.
Exception in thread "main" java.lang.NoSuchMethodError: org.apache.camel.CamelContext.getRestConfiguration(Ljava/lang/String;Z)Lorg/apache/camel/spi/RestConfiguration; at org.apache.camel.component.restlet.RestletComponent.doStart(RestletComponent.java:215) at org.apache.camel.support.service.BaseService.start(BaseService.java:115) at org.apache.camel.impl.engine.AbstractCamelContext.startService(AbstractCamelContext.java:3026) at org.apache.camel.impl.engine.AbstractCamelContext.startServices(AbstractCamelContext.java:3032) at org.apache.camel.impl.engine.AbstractCamelContext.doStartCamel(AbstractCamelContext.java:2759) at org.apache.camel.impl.engine.AbstractCamelContext.doStartContext(AbstractCamelContext.java:2658) at org.apache.camel.impl.engine.AbstractCamelContext.doStart(AbstractCamelContext.java:2621) at org.apache.camel.support.service.BaseService.start(BaseService.java:115) at org.apache.camel.impl.engine.AbstractCamelContext.start(AbstractCamelContext.java:2453) at com.nri.csd.inf.console.service.GatewayService.startCamelContextIfNotStarted(GatewayService.java:201) at com.nri.csd.inf.console.service.GatewayService.postStart(GatewayService.java:100) at com.nri.csd.inf.console.service.AbstractLaunchableService.start(AbstractLaunchableService.java:216) at com.nri.csd.inf.console.ConsoleLauncher.main(ConsoleLauncher.java:96)
Found in the code that RestletComponent java class in camel-restlet-3.0.0-RC2 version has an API doStart() in which at line 215, there is a call to CamelContext class's method getRestConfiguration("restlet", true) (class in camel-api jar).
210 @Override 211 protected void doStart() throws Exception { 212 super.doStart(); 213 214 // configure component options 215 RestConfiguration config = getCamelContext().getRestConfiguration("restlet", true); 216 // configure additional options on spark configuration 217 if (config.getComponentProperties() != null && !config.getComponentProperties().isEmpty()) { 218 setProperties(this, config.getComponentProperties()); 219 } 220 221 cleanupConverters(enabledConverters); 222 223 component.start(); 2234 }
The API called at line 215 above (i.e. getRestConfiguration) seems to be removed from the class org.apache.camel.CamelContext in library camel-api during upgradation to 3.2 from 3.1.
Refer this https://camel.apache.org/manual/latest/camel-3x-upgrade-guide-3_2.html
However the above API in org.apache.camel.CamelContext in camel-api-3.0.0-RC2 is modified but I am having a transitive dependency upon camel-api-3.4 library (as we need to use camel-jms component as well) and it seems that both camel-api-3.4.4 and camel-api-3.0.0-RC2 cannot be kept together as it gives me some other error if both these libraries are present in the classpath.
java.lang.ClassNotFoundException: org.apache.camel.EndpointProducerResolver
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
This is because the class org.apache.camel.EndpointProducerResolver is present in camel-api-3.4.4 but not present in camel-api-3.0.0-RC2.
So it seems there is some cyclic dependency where I am trapped.
Please suggest what course of action can be taken for this issue with minimum impact or what is the compatibility of camel-restlet component and camel-api, camel-support libraries. We want all to be compatible with camel 3.4.4 version.