WebSphere Application Server & Liberty

Hi

I am running WebSphere application server 9 (Java 1.8) which hosts a JAX-RS  application and would like to inject spring beans ( Spring-Core version 5.3.27) into the application. 

Since websphere JAX-RS depends on IBMRestServlet, following the reference http://www.javavillage.in/spring-ioc-on-servlets.php,  I tried  creating a class that extends the IBMRestServlet and adding in an init() like one below

@Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

    }

I had to add in was_public.jar and j2ee.jar provided in the WebSphere Dev folder as "provided" dependency in maven but maven was still complaining about following

[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] cannot access com.ibm.ws.ras.instrument.annotation.InjectedFFDC
  class file for com.ibm.ws.ras.instrument.annotation.InjectedFFDC not found

I was not able to resolve the dependency. I searched IBM resources for a solution but could not find any.  Greatly appreciate if anyone can guide me here or suggest a better approach

In meanwhile, I tried the following alternate method

Alternate Method : Load Spring within Resource Class

I tried loading spring context within the resource class and was successfully able to use Spring beans 

 @Component
@Path("/mypath")
public class MyResource {


	@Autowired
	TestClass testClass;


	@POST
	@Path("/subpath")
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	public Response getSomeWork(MyRequest request)  {
		
		ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
		TestClass tClass = applicationContext.getBean(TestClass.class);
		
		..
	}

the Web.xml needed the following

<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/webApplicationContext.xml</param-value>
	</context-param>

Unfortunately as it is obvious, there would be a big overhead of the initialization per resource along with having multiple Spring ApplicationContext ( one per resource)  for the  application which is undesirable

Thanks in advance

Sibi

Hi All,

Apologies, I posted the same twice, kindly respond to 

https://community.ibm.com/community/user/wasdevops/discussion/injecting-spring-beans-to-jax-rs-resource-running-on-websphere-application-server-9-jdk-18?ReturnUrl=%2fcommunity%2fuser%2fwasdevops%2fcommunities%2fcommunity-home%2fdigestviewer%3fcommunitykey%3d5c4ba155-561a-4794-9883-bb0c6164e14e

Thanks

@Override    public void init(ServletConfig config) throws ServletException {        super.init(config);        SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);    }

[ERROR] COMPILATION ERROR :[INFO] -------------------------------------------------------------[ERROR] cannot access com.ibm.ws.ras.instrument.annotation.InjectedFFDC  class file for com.ibm.ws.ras.instrument.annotation.InjectedFFDC not found

 @Component@Path("/mypath")public class MyResource {	@Autowired	TestClass testClass;	@POST	@Path("/subpath")	@Consumes(MediaType.APPLICATION_JSON)	@Produces(MediaType.APPLICATION_JSON)	public Response getSomeWork(MyRequest request)  {				ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");		TestClass tClass = applicationContext.getBean(TestClass.class);				..	}

<listener>		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>	</listener>	<context-param>		<param-name>contextConfigLocation</param-name>		<param-value>/WEB-INF/webApplicationContext.xml</param-value>	</context-param>