Chapter Interservlet Communication Servlets running together in the same server have several ways to communicate with each other. There are three major . I have a Websocket servlet and a Rest servlet. I want to inform the websocket servlet about changes in order to write these “events” via websocket to a server. hi iam new to interservlet iam familiar with servlet only i am planning to write interservlet
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As the name says it, it is communication between servlets.
Servlets talking to each other. Which is a process in which you pass the output of one servlet as the input to other. These servlets should be running in the same server.
What is inter-servlet communication?
There are some Servlet engine specific configurations for servlet chaining. Servlets can also call public functions of other servlets running in the same server. This can be done by obtaining a handle to the desired servlet through the ServletContext Object by passing it the servlet name this object can return any servlets running in the server.
And then calling the function on the returned Servlet object.
If the servlet that you want to call implements the SingleThreadModel interface, your call could conflict with the servlet’s single threaded nature. The server cannot intervene and make sure your cojmunication happens when the servlet is not interacting with another client.
In this case, your servlet should make an HTTP request to the other servlet instead of direct calls. Servlets could also invoke other servlets programmatically by sending an HTTP request. This could be done by opening a URL connection to the desired Servlet.
Java Servlet Programming by Jason Hunter
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