August 14, 2022

Illegal to inject a message body into a singleton into public org.codehaus.jackson.jaxrs.JacksonJsonProvider

Using Jackson as JSON provider in RESTEasy. With RESTEasy auto scanning enabled. When starting up, it hits following errors and failed to start up any of the RESTEasy services: Illegal to inject a message body into a singleton into public org.codehaus.jackson.jaxrs.JacksonJsonProvider

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JSON example with RESTEasy + Jackson

Many like Jackson JSON processor, and it supported in RESTEasy. In this tutorial, we show you how to convert an object to JSON format and return it back to the client. To integrate Jackson with RESTEasy, you just need to include “resteasy-jackson-provider.jar“. When RESTEasy returned a json output, it will use Jackson provider to convert it automatically. You do not need to code a single line to integrate both.

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RESTEasy CRUD with H2 database tutorial

RESTEasy CRUD tutorial shows how to create a JAX-RS CRUD example with RESTEasy. RESTEasy is a Java framework for developing RESTful Web Services. It is a fully certified and portable implementation of the JAX-RS 2.0 specification. JAX-RS 2.0 specification is a JCP (Java Community Process) specification that provides a Java API for RESTful Web Services over the HTTP protocol. RESTEasy can run in any Servlet container.

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RESTEasy Tutorial with Eclipse and Tomcat

Welcome to RESTEasy Tutorial. RESTEasy is the JAX-RS implementation provided by JBoss project. We can use RESTEasy to create restful web services. RESTEasy provides tighter integration with the JBoss Application Server but we can deploy it on any servlet container. So today we will learn how to create restful web service using RestEasy framework and deploy in Tomcat servlet container to test it.

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RESTEasy + Spring integration example

Here we show you two general ways to inject Spring bean into JBoss RESTEasy, below solutions should works on most of the web frameworks and JAX-RS implementations also. Method 1 – Use WebApplicationContextUtils + ServletContext. Method 2 – Create a class to implement ApplicationContextAware interfaces, with singleton pattern is recommended. In this tutorial, we are integrating RESTEasy 2.2.1.GA with Spring 3.0.5.RELEASE.

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