Re: Cannot get TomEE to use Jackson
2017-08-10 19:06 GMT+02:00 Thiesius : > I wasn't pointing out the problem with lazy collections. I had @JsonIgnore > on > that property. But since the Jackson didn't kick in, Johnzon skipped the > annotation and tried to serialize the property. > > Anyways the *problem was indeed with the @Provider* annotation. Thank you > very much for helping me fixing this. > > Anyways why is it such a hassle to get it working under TomEE? > > Well it is not linked to tomee by itself. Jackson defines himself as being a fallback provider so used if no other provider matches the request (based on JAX-RS 2 rules). Since johnzon is defined to match json as the last one (so if you drop another json provider it is taken automatically) it has a higher priority then jackson. If jackson defines himself as matching json then it would be transparent. > > > -- > View this message in context: http://tomee-openejb.979440. > n4.nabble.com/Cannot-get-TomEE-to-use-Jackson-tp4682409p4682416.html > Sent from the TomEE Users mailing list archive at Nabble.com. >
Re: Cannot get TomEE to use Jackson
I wasn't pointing out the problem with lazy collections. I had @JsonIgnore on that property. But since the Jackson didn't kick in, Johnzon skipped the annotation and tried to serialize the property. Anyways the *problem was indeed with the @Provider* annotation. Thank you very much for helping me fixing this. Anyways why is it such a hassle to get it working under TomEE? -- View this message in context: http://tomee-openejb.979440.n4.nabble.com/Cannot-get-TomEE-to-use-Jackson-tp4682409p4682416.html Sent from the TomEE Users mailing list archive at Nabble.com.
Re: Cannot get TomEE to use Jackson
The error is a problem with hibernate and lazy collections. Try returning
just a mocked object, not from database.
Jackson works in tomee, to get it working you need a @Producer
@Provider
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class JacksonJSONProvider extends
com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider {
public JacksonJSONProvider() {
super();
setMapper(JsonParser.defaultJacksonObjectMapper()); //Your mapper
}
}
See
http://stackoverflow.com/questions/38904640/how-to-use-jackson-as-json-provider-for-jax-rs-client-instead-of-johnzon-in-tome
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Cannot get TomEE to use Jackson
Hello,
no matter how hard I try I just cannot get TomEE to use Jackson instead of
Johnzon. Want to use Jersey with Jackson
I tried to:
- Set the providers "cxf.jaxrs.providers" in openejb-jar.xml
( log entry: org.apache.openejb.server.rest.RESTService.deployApplication
Registered JAX-RS Configuration: ...)
- Extend Jackson provider as
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class OurJsonProvider
extends com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider {}
I have pom dependencies:
com.fasterxml.jackson.jaxrs
jackson-jaxrs-json-provider
2.9.0
org.glassfish.jersey.media
jersey-media-json-jackson
2.26-b09
etc.
Yet whenever I try to serialize object I get
Caused by: org.hibernate.LazyInitializationException: failed to lazily
initialize a collection of role: ..., could not initialize proxy - no
Session
at
org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:582)
at
org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:201)
at
org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:561)
at
org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:132)
at
org.hibernate.collection.internal.PersistentBag.iterator(PersistentBag.java:277)
at
org.apache.*johnzon*.mapper.MappingGeneratorImpl.writeValue(MappingGeneratorImpl.java:315)
and a lot more johnzon stacktracke lines...
Obviously because I have my properties annotated with Jackson and the object
is serialized with Johnzon instead and it's ignoring my annotations.
What am I doing wrong?
Thank you
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