I need to create a new EmployeeInfoCache instance (not a singleton) from info in the HttpServletRequest that is used to get info from an external app. I then want to give this object as a dependency to non-web-layer objects (where it will be set for all @Autowired references). EmployeeInfoCache itself has no web-layer dependencies (e.g. HttpServletRequest).
Can this be done? I thought about writing a spring interceptor which does the following but I don't know what to do to put an object in the spring context such that it will be used to resolve all @Autowired dependencies.
e.g.
public class MyInterceptor extends HandlerInterceptorAdapter
{
public boolean preHandle(
HttpServletRequest request,
HttpServletResponse response,
Object handler) throws Exception
{
- use info from HttpServletRequest to make calls to external app
- create EmployeeInfoCache object w/ this info
- add EmployeeInfoCache to spring application context where it will be used for resolution of @Autowired
}
}
And the remaining code:
// Assume don't have 'Component' or a similar annotation?
public class EmployeeInfoCache
{
...
}
// REST controller that calls the business logic method
@Controller
MyController
{
@Autowired
private MyBusinessObjectInterface myBusinessObject;
@RequestMapping(...)
public @ResponseBody MyResult myMethod(@RequestBody MyObject myObject, HttpServletRequest request, HttpServletResponse response)
{
myBusinessObject.doIt();
}
}
// Non-web-layer code that uses EmployeeInfoCache
@Service(...)
MyBusinessObject implements MyBusinessObjectInterface
{
// I want the EmployeeInfoCache instance created in MyInterceptor to be autowired here
@Autowired
private EmployeeInfoCache employeeInfoCache;
@Override
public void doIt()
{
employeeInfoCache.getName();
}
}
