As per my experience in Spring <context:component-scan base-package="<package name>"/> is enough in application context and through @Autowired beans will able to inject.
But Now I am using Spring 4.3 and configuring application context thru xml. Then bean is null (not injected).
If I remove comment in application context, bean will be available.
See the xml and my resource class here.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<context:component-scan base-package="com.mcp.rest.jersy2.service.*"/>
<!--
<bean id ="userService" class = "com.mcp.rest.jersy2.service.UserServiceImpl"></bean>
-->
@Path("/service")
@Component
public class UserServiceResource {
private static final String text = "Message from Server :%s ";
@Autowired
private UserService userService;
@GET
@Path("{name}")
@Consumes(MediaType.TEXT_PLAIN)
public Response getMsg(@PathParam("name") String name) {
String response = String.format(text, name);
return Response.status(Response.Status.OK).entity(response).type(MediaType.TEXT_PLAIN).build();
}
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
}
what is the problem?
Service class:
package com.mcp.rest.jersy2.service;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserService
{
}
IGNORE NOW
My Component scan was issue. I need to cover the package where beans are injecting.
I reduced
<context:component-scan base-package="com.mcp.rest.jersy2.service.*"/>
to
<context:component-scan base-package="com.mcp.rest.jersy2.*"/>
