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Using Google Guice with Atmosphere

· Java Zone

Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code! Brought to you in partnership with ZeroTurnaround.

Starting with Atmosphere 0.5, you can now use Google Guice to configure Atmosphere. Google Guice support is enabled by referencing the Guice filter GuiceFilter and an application specific ServletContextListener that extends from GuiceServletContextListener in the web.xml. For example, the web.xml may be as follows:

   <web-app>
<listener>
<listener-class>org.atmosphere.samples.guice.GuiceChatModule</listener-class>
</listener>
<filter>

<filter-name>Guice Filter</filter-name>
<filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
</filter>
<filter-mapping>

<filter-name>Guice Filter</filter-name>

<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

and the application specific servlet context listener may be as follows:

public class GuiceChatConfig extends GuiceServletContextListener {

@Override
protected Injector getInjector() {
return Guice.createInjector(new GuiceChatModule());
}
}

with

public class GuiceChatModule  extends ServletModule{

@Override
protected void configureServlets(){
Map params = new HashMap();
params.put(PackagesResourceConfig.PROPERTY_PACKAGES, "org.atmosphere.samples.guice");
serve("/chat*").with(AtmosphereGuiceServlet.class, params);
}
}

That's it. You can download the previously Atmosphere-Jersey sample, this time Guice enabled from here. For any questions or to download Atmosphere, go to our main site and use our Nabble forum (no subscription needed) or follow us on Twitter and tweet your questions there!

From http://weblogs.java.net/blog/jfarcand

The Java Zone is brought to you in partnership with ZeroTurnaround. Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code!

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