CODEWITHSUNDEEP
javaspringdependency-injectionstripes
Dónal
Dónal

Reputation: 187539

dependency inject servlet listener

In my Stripes app I define the following class:

MyServletListener implements ServletContextListener, HttpSessionListener, HttpSessionAttributeListener {

  private SomeService someService;

  private AnotherService anotherService;

  // remaining implementation omitted
}

The service layer of this app uses Spring to define and wire together some service beans in an XML file. I would like to inject the beans that implement SomeService and AnotherService into MyServletListener, is this possible?

Upvotes: 15

Views: 8552

Answers (2)

Ondrej Bozek
Ondrej Bozek

Reputation: 11481

Little bit shorter and simpler is to use SpringBeanAutowiringSupport class.
Than all you have to do is this:

SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

So using example from axtavt: 

public class MyServletListener implements ServletContextListener, HttpSessionAttributeListener, HttpSessionListener {
    @Autowired
    private SomeService someService;        
    @Autowired
    private AnotherService anotherService; 

    public void contextInitialized(ServletContextEvent sce) {
        SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
    }

    ...
}

Upvotes: 12

axtavt
axtavt

Reputation: 242706

Something like this should work:

public class MyServletListener implements ServletContextListener, HttpSessionAttributeListener, HttpSessionListener {
    @Autowired
    private SomeService someService;        
    @Autowired
    private AnotherService anotherService; 

    public void contextInitialized(ServletContextEvent sce) {
        WebApplicationContextUtils
            .getRequiredWebApplicationContext(sce.getServletContext())
            .getAutowireCapableBeanFactory()
            .autowireBean(this);
    }

    ...
}

Your listener should be declared after Spring's ContextLoaderListener in web.xml.

Upvotes: 26

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