Mule REST APIKit- My flow isn't returning a messge body

mule, rest, synchronous

Solution

In your raml file, make sure your resource method is mapping the response 200 body with application/json. For example...

/person:
  post: 
    responses:
      200:
        body:
          application/json:

Problem

**Issue solved, thanks to neildo. Here's what it took to get a response from a POST - RAML file must have a response body definition - HTTP Endpoint must be set to request-response - All Flows using the synchronous Processing Strategy - Accept and Content-Type HTTP headers set to application/json on the request ** The implementation of my REST Flow calls a Java API that returns a Java object. I then convert the object to a JSON document and return it to the client. My Logger step is logging the correct data, however the client just gets a 200 OK with an empty body. I have set all my Flows to synchronous and my HTTP Endpoint to request-response. What am I missing? Thank you! Nathan Here is my XML file ``` <apikit:config name="IAMPerson-config" raml="IAMPerson.raml" consoleEnabled="true" consolePath="console" doc:name="Router"/> <apikit:mapping-exception-strategy name="IAMPerson-apiKitGlobalExceptionMapping"> <apikit:mapping statusCode="404"> <apikit:exception value="org.mule.module.apikit.exception.NotFoundException" /> <set-property propertyName="Content-Type" value="application/json" /> <set-payload value="{ &quot;message&quot;: &quot;Resource not found&quot; }" /> </apikit:mapping> ... </apikit:mapping-exception-strategy> <flow name="IAMPerson-main" doc:name="IAMPerson-main" processingStrategy="synchronous"> <http:inbound-endpoint address="http://localhost:8081/api" doc:name="HTTP" exchange-pattern="request-response" password="admin" user="admin" contentType="application/json"/> <apikit:router config-ref="IAMPerson-config" doc:name="APIkit Router"/> <exception-strategy ref="IAMPerson-apiKitGlobalExceptionMapping" doc:name="Reference Exception Strategy"/> </flow> <flow name="post:/person:IAMPerson-config" doc:name="post:/person:IAMPerson-config" processingStrategy="synchronous"> <json:json-to-object-transformer doc:name="JSON to Object" returnClass="PersonDTO"/> <invoke name="invokeCreate" object-ref="personService" method="create" methodArguments="#[payload]"></invoke> <json:object-to-json-transformer sourceClass="Person" doc:name="Person Object to JSON"/> <logger level="INFO" doc:name="Logger" message="#[payload]"/> </flow> <flow name="put:/person:IAMPerson-config" doc:name="put:/person:IAMPerson-config" processingStrategy="synchronous"> <logger level="INFO" doc:name="Logger" message="#[payload]"/> <json:json-to-object-transformer doc:name="JSON to Object" returnClass="PersonDTO"/> <invoke name="invokeUpdate" object-ref="personService" method="update" methodArguments="#[payload]"/> <json:object-to-json-transformer sourceClass="Person" doc:name="Person Object to JSON"/> <logger level="INFO" doc:name="Logger" message="#[payload]"/> </flow> ``` Here is part of my RAML file where I define a request and response body. When I posted a message to Mule, I got this error with nothing logged to the Mule console. null (java.lang.NullPointerException). Message payload is of type: ContentLengthInputStream ``` post: body: application/json: responses: 200: body: application/json: ```

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