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POMule: process expression evaluator
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  1. POMule: process expression evaluator
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    copied!<p>I'm trying to use the expression <code>#[process:processName:valueToProcess]</code> in my flow.</p> <p>This is my flow config:</p> <pre><code>&lt;flow name="exampleFlow"&gt; &lt;quartz:inbound-endpoint jobName="job1" cronExpression="0/5 * * * * ?" connector-ref="quartzConnector"&gt; &lt;quartz:event-generator-job&gt; &lt;quartz:payload&gt;foo&lt;/quartz:payload&gt; &lt;/quartz:event-generator-job&gt; &lt;/quartz:inbound-endpoint&gt; &lt;logger message="#[process:test:#[payload]]" level="INFO"/&gt; &lt;/flow&gt; &lt;sub-flow name="test" doc:name="test"&gt; &lt;component class="com.myComp.ComponentTest" doc:name="Java"/&gt; &lt;/sub-flow&gt; </code></pre> <p>And this is my Java Component:</p> <pre><code>package com.myComp; public class ComponentTest { public String test(String s) { return s + "bar"; } } </code></pre> <p>The problem comes when the expression <code>#[process:test:#[payload]]</code> is evaluated. It throws this exception:</p> <pre><code>java.lang.NullPointerException at org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:112) at org.mule.component.AbstractComponent.process(AbstractComponent.java:156) at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:99) at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:66) at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:56) at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:66) at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:87) at org.mule.api.processor.MessageProcessors$LifecyleAwareMessageProcessorWrapper.process(MessageProcessors.java:114) at org.mule.expression.MessageProcessorExpressionEvaluator.evaluate(MessageProcessorExpressionEvaluator.java:87) at org.mule.expression.DefaultExpressionManager.evaluate(DefaultExpressionManager.java:273) at org.mule.expression.DefaultExpressionManager.evaluate(DefaultExpressionManager.java:209) at org.mule.expression.DefaultExpressionManager$1.match(DefaultExpressionManager.java:399) at org.mule.util.TemplateParser.parse(TemplateParser.java:156) at org.mule.util.TemplateParser.parse(TemplateParser.java:133) at org.mule.expression.DefaultExpressionManager.parse(DefaultExpressionManager.java:395) at org.mule.expression.DefaultExpressionManager.parse(DefaultExpressionManager.java:379) at org.mule.api.processor.LoggerMessageProcessor.log(LoggerMessageProcessor.java:89) at org.mule.api.processor.LoggerMessageProcessor.process(LoggerMessageProcessor.java:71) at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:99) at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:66) at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:105) at org.mule.interceptor.AbstractEnvelopeInterceptor.process(AbstractEnvelopeInterceptor.java:55) at org.mule.processor.AsyncInterceptingMessageProcessor.processNextTimed(AsyncInterceptingMessageProcessor.java:111) at org.mule.processor.AsyncInterceptingMessageProcessor$AsyncMessageProcessorWorker.doRun(AsyncInterceptingMessageProcessor.java:158) at org.mule.work.AbstractMuleEventWork.run(AbstractMuleEventWork.java:43) at org.mule.work.WorkerContext.run(WorkerContext.java:310) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) </code></pre> <p>The same happens with any other scripting component. I'm guessing it has something to do with my component lifecycle, but I couldn't find a way to make it work. If I replace my component with any other Mule processor (e.g. logger, stringAppend) it works fine.</p> <p>Any help will be appreciated!</p>
 

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