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https://issues.apache.org/jira/browse/CAMEL-11749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Claus Ibsen resolved CAMEL-11749.
---------------------------------
Resolution: Not A Problem
You need to configure a name in the bean you use with Spring, eg @Component
should be @Component(name = "xxx") or something to use name you call the bean
with from the camel route.
The 2nd example is calling the bean directly which you have let Spring
dependency inject into the route class.
> NoTypeConversionAvailableException in wiretap
> ---------------------------------------------
>
> Key: CAMEL-11749
> URL: https://issues.apache.org/jira/browse/CAMEL-11749
> Project: Camel
> Issue Type: Improvement
> Components: camel-core
> Affects Versions: 2.19.2
> Reporter: Keegan Witt
> Assignee: Claus Ibsen
>
> # Clone
> https://github.com/apache/camel/tree/master/examples/camel-example-spring-boot
> # Add _CamelLogger.java_ with contents below to
> _src/main/java/org/apache/camel/examples_
> {code:title=CamelLogger.java}
> package org.apache.camel.examples;
> import org.apache.camel.Exchange;
> import org.apache.camel.Processor;
> import org.springframework.stereotype.Component;
> @Component
> public class CamelLogger implements Processor {
> @Override
> public void process(Exchange exchange) {
> System.err.println(exchange.getIn().getBody());
> }
> }
> {code}
> Changing _SampleCamelRouter_ to
> {code:java}
> @Component
> public class SampleCamelRouter extends RouteBuilder {
> @Override
> public void configure() throws Exception {
> from("timer:hello?period={{timer.period}}")
> .transform(method("myBean", "saySomething"))
> .wireTap("bean:camelLogger")
> .to("stream:out");
> }
> }
> {code}
> Fails with stacktrace
> {noformat}
> Stacktrace
> ---------------------------------------------------------------------------------------------------------------------------------------
> org.apache.camel.NoTypeConversionAvailableException: No type converter
> available to convert from type: null to the required type: java.lang.String
> with value null
> at
> org.apache.camel.impl.converter.BaseTypeConverterRegistry.mandatoryConvertTo(BaseTypeConverterRegistry.java:206)
> ~[camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.SendDynamicProcessor.resolveEndpoint(SendDynamicProcessor.java:144)
> ~[camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.SendDynamicProcessor.process(SendDynamicProcessor.java:104)
> ~[camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:548)
> ~[camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:201)
> [camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:97)
> [camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.WireTapProcessor$1.call(WireTapProcessor.java:158)
> [camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at
> org.apache.camel.processor.WireTapProcessor$1.call(WireTapProcessor.java:153)
> [camel-core-2.20.0-20170905.112154-218.jar:2.20.0-SNAPSHOT]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> [na:1.8.0_144]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [na:1.8.0_144]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [na:1.8.0_144]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]
> {noformat}
> With Camel 2.15.5 or with _SampleCamelRouter_ of content below, exception
> doesn't occur.
> {code:java}
> @Component
> public class SampleCamelRouter extends RouteBuilder {
> @Resource CamelLogger camelLogger;
> @Override
> public void configure() throws Exception {
> from("timer:hello?period={{timer.period}}")
> .transform(method("myBean", "saySomething"))
> .wireTap("direct:logging")
> .to("stream:out");
> from("direct:logging").process(camelLogger);
> }
> }
> {code}
> I didn't see anything in release notes in 2.16, 2.17, 2.18, or 2.19 that
> would indicate there's a change in behavior from 2.15 in this regard. Either
> this is a bug that should be fixed, or the change in behavior should be
> documented.
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