Mixing expressions in a Catch Exception Strategy for Mule 3.3 - mule

Question

I'm trying to implement error handling logic in my Mule flow and I want to test for HTTP status codes. I've implemented a Message filter, and want my catch-exception-strategy to catch the org.mule.api.routing.filter.FilterUnacceptedException the message-property-filter throws, which I can do, but I want it to be almost nested, but I know I can't do that, so I'm combining my logic statement by an AND operation, like so:
<catch-exception-strategy when="#[exception.causedBy(org.mule.api.routing.filter.FilterUnacceptedException) && header:INBOUND:http.status=404]" doc:name="Catch Exception Strategy">
How ever this is causing an error in my flow when it is hit:
[11-03 19:42:33] ERROR CatchMessagingExceptionStrategy [[fault_test].connector.http.mule.default.receiver.02]:
********************************************************************************
Message : Message has been rejected by filter. Message payload is of type: ReleasingInputStream
Code : MULE_ERROR--2
--------------------------------------------------------------------------------
Exception stack is:
1. Message has been rejected by filter. Message payload is of type: ReleasingInputStream (org.mule.api.routing.filter.FilterUnacceptedException)
org.mule.routing.MessageFilter:100 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/routing/filter/FilterUnacceptedException.html)
--------------------------------------------------------------------------------
Root Exception stack trace:
org.mule.api.routing.filter.FilterUnacceptedException: Message has been rejected by filter. Message payload is of type: ReleasingInputStream
at org.mule.routing.MessageFilter.filterUnacceptedException(MessageFilter.java:100)
at org.mule.processor.AbstractFilteringMessageProcessor.handleUnaccepted(AbstractFilteringMessageProcessor.java:62)
at org.mule.processor.AbstractFilteringMessageProcessor.process(AbstractFilteringMessageProcessor.java:48)
+ 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
********************************************************************************
[11-03 19:42:33] ERROR CatchMessagingExceptionStrategy [[fault_test].connector.http.mule.default.receiver.02]: Failed to dispatch message to error queue after it failed to process. This may cause message loss.Logging Message here:
org.mule.DefaultMuleMessage
{
id=856cd942-2618-11e2-9e97-f5a070de55a6
payload=org.mule.transport.http.ReleasingInputStream
correlationId=<not set>
correlationGroup=-1
correlationSeq=-1
encoding=UTF-8
exceptionPayload=org.mule.message.DefaultExceptionPayload#e90e23
Message properties:
INVOCATION scoped properties:
INBOUND scoped properties:
Connection=true
Content-Type=text/xml;charset=UTF-8
Date=Sat, 03 Nov 2012 07:42:32 CDT
Keep-Alive=true
MULE_ENCODING=UTF-8
MULE_SESSION=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
Server=Mule EE Core Extensions/3.3.0
Set-Cookie=[Lorg.apache.commons.httpclient.Cookie;#9f2588
Transfer-Encoding=chunked
http.headers={MULE_SESSION=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, Transfer-Encoding=chunked, Date=Sat, 03 Nov 2012 07:42:32 CDT, MULE_ENCODING=UTF-8, Keep-Alive=true, Set-Cookie=[Lorg.apache.commons.httpclient.Cookie;#9f2588, Connection=true, http.status=500, Content-Type=text/xml;charset=UTF-8, Server=Mule EE Core Extensions/3.3.0}
http.method=POST
http.query.params={}
http.query.string=
http.status=500
http.version=HTTP/1.1
OUTBOUND scoped properties:
MULE_ENCODING=UTF-8
MULE_SESSION=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
SESSION scoped properties:
}
org.mule.api.MessagingException: [Error: was expecting type: java.lang.Boolean; but found type: java.util.Map]
[Near : {... eader:INBOUND:http.status=404 ....}]
^
[Line: 1, Column: 110] (org.mule.api.expression.InvalidExpressionException). Message payload is of type: ReleasingInputStream
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:35)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:43)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:43)
at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:93)
at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:66)
at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:57)
at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:66)
at org.mule.processor.chain.InterceptingChainLifecycleWrapper.access$001(InterceptingChainLifecycleWrapper.java:29)
at org.mule.processor.chain.InterceptingChainLifecycleWrapper$1.process(InterceptingChainLifecycleWrapper.java:90)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:43)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:43)
at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:85)
at org.mule.exception.TemplateMessagingExceptionStrategy.route(TemplateMessagingExceptionStrategy.java:136)
at org.mule.exception.TemplateMessagingExceptionStrategy.handleException(TemplateMessagingExceptionStrategy.java:46)
at org.mule.exception.ChoiceMessagingExceptionStrategy.handleException(ChoiceMessagingExceptionStrategy.java:44)
at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:45)
at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:18)
at org.mule.execution.BeginAndResolveTransactionInterceptor.execute(BeginAndResolveTransactionInterceptor.java:58)
at org.mule.execution.ResolvePreviousTransactionInterceptor.execute(ResolvePreviousTransactionInterceptor.java:48)
at org.mule.execution.SuspendXaTransactionInterceptor.execute(SuspendXaTransactionInterceptor.java:54)
at org.mule.execution.ValidateTransactionalStateInterceptor.execute(ValidateTransactionalStateInterceptor.java:44)
at org.mule.execution.IsolateCurrentTransactionInterceptor.execute(IsolateCurrentTransactionInterceptor.java:44)
at org.mule.execution.ExternalTransactionInterceptor.execute(ExternalTransactionInterceptor.java:52)
at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:32)
at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:17)
at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:113)
at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:34)
at org.mule.transport.http.HttpMessageReceiver$HttpWorker.doRequest(HttpMessageReceiver.java:305)
at org.mule.transport.http.HttpMessageReceiver$HttpWorker.processRequest(HttpMessageReceiver.java:251)
at org.mule.transport.http.HttpMessageReceiver$HttpWorker.run(HttpMessageReceiver.java:163)
at org.mule.work.WorkerContext.run(WorkerContext.java:311)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.mule.api.expression.InvalidExpressionException: [Error: was expecting type: java.lang.Boolean; but found type: java.util.Map]
[Near : {... eader:INBOUND:http.status=404 ....}]
^
[Line: 1, Column: 110]
at org.mule.el.mvel.MVELExpressionLanguage.validate(MVELExpressionLanguage.java:244)
at org.mule.el.mvel.MVELExpressionLanguage.evaluateInternal(MVELExpressionLanguage.java:195)
at org.mule.el.mvel.MVELExpressionLanguage.evaluate(MVELExpressionLanguage.java:169)
at org.mule.expression.DefaultExpressionManager.evaluate(DefaultExpressionManager.java:234)
at org.mule.expression.DefaultExpressionManager.evaluateBoolean(DefaultExpressionManager.java:361)
at org.mule.routing.filters.ExpressionFilter.accept(ExpressionFilter.java:127)
at org.mule.routing.ChoiceRouter.selectProcessors(ChoiceRouter.java:35)
at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:194)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
... 34 more
Is there way to implement this type of logic in Mule?

Answer 1

The problem is that you are mixing expression evaluator. Your when clause should look like the following:
<catch-exception-strategy when="#[exception.causedBy(org.mule.api.routing.filter.FilterUnacceptedException) and message.inboundProperties['http.status']=404 ]" doc:name="Catch Exception Strategy">
Here you can find the documentation about MEL