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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