How to have resteasy use jackson 2 in wildfly 8.0 / 8.1

[pnicolai]

I was expecting to have Resteasy use version 2.x of jackson but when looking at the root cause of an exception on json serialization of the return of a REST call, it looks like  resteasy 3.0.6 is using jackson 1.9.x.

I switched from Wildfly 8.0  to 8.1  (OOB deployments) but am getting the same problem.

Although I can use jackson 2 within my App, resteasy keeps using 1.9 and causing me troubles.

How can one get resteasy use jackson 2 ?

Thanks for your help

Caused by: org.codehaus.jackson.map.JsonMappingException: No serializer found for class com.opscope.model.ci.impl.memory.MemoryElementIterator and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: java.util.ArrayList[0]->com.opscope.model.ci.impl.memory.NodeType["srcElements"])

  at org.codehaus.jackson.map.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:52) [jackson-mapper-asl-1.9.13.jar:1.9.13]

  at org.codehaus.jackson.map.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:25) [jackson-mapper-asl-1.9.13.jar:1.9.13]

  at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446) [jackson-mapper-asl-1.9.13.jar:1.9.13]

  at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150) [jackson-mapper-asl-1.9.13.jar:1.9.13]

  at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112) [jackson-mapper-asl-1.9.13.jar:1.9.13]

[resteasy-jaxrs-3.0.6.Final.jar:]

  at org.jboss.resteasy.core.interception.ServerWriterInterceptorContext.writeTo(ServerWriterInterceptorContext.java:62) [resteasy-jaxrs-3.0.6.Final.jar:]

[jamezp]

FWIW in WildFly 9 Jackson 2 will be the default, [WFLY-3200] Support Jackson 2 out of the box - JBoss Issue Tracker.

To get it to work in WildFly 8 or JBoss EAP/JBoss AS 7.1.1.Final you need to add a jboss-deployment-structure.xml with the following content.

<jboss-deployment-structure>
    <deployment>
        <exclusions>
           <module name="org.jboss.resteasy.resteasy-jackson-provider"/>
        </exclusions>
        <dependencies>
            <module name="org.jboss.resteasy.resteasy-jackson2-provider" services="import"/>
        </dependencies>
    </deployment>
</jboss-deployment-structure> 

There is more information in the documentation Chapter 21. JSON Support via Jackson.

--

James R. Perkins

[ctomc]

Bit of an update.

as of latest nightly builds and 8.1.0.CR2 that is going to be released shortly, Jackson2 became default JSON provider in WildFly.

In short, workarounds as described above have become obsolete.