DWR is a Java library that enables bidirectional communication between Java code running on a server and JavaScript running in a web browser. It allows JavaScript to directly call methods on Java objects running on the server and the Java code to asynchronously call JavaScript functions. DWR handles all of the data serialization and transport between the two environments using JSON.

1. @Andre_Mayer

3. Joe Walker

11. web.xml

14. 5

15. Chat.js

16. engine.js

18. it works!!

19. Advantages Disadvantages Easy integration between Java and JavaScript Only works in Java platform. Integrates with Spring Beans; Marshalling: JSON may be unsafe unless you are using unpredictable URLs. Real possibility to keep your MVC standard Going through not standard way in “transfer technologies” using AJAX (old-fashion) instead web sockets (socket.io) Integrates with leading Java Frameworks ( Spring, JSF, Hibernate) Debugging in console; Cross-browser