Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Troubleshooting Guide

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# How Do I Maintain a Session in JAX-RPC?

Clients cannot maintain sessions with JAX-RPC endpoints. There is a client and server aspect to sessions, and it is not obvious how to set this up.

The situation is that a client makes a call to the service, and the server responds and sets a cookie on the connection. From then on, the client sends back that same cookie with each call and the server can check it.

A JAX-RPC stub normally ignores the cookie that comes back. When the `SESSION_MAINTAIN_PROPERTY` is set to `true`, it sends back whatever cookie the server set on it.

On the server side, you need to add one field to your class and a method that sets it. The endpoint must implement `javax.xml.rpc.server.ServiceLifecycle`., and two methods must be added: `destroy()` (which can be empty) and `init(Object context)`.

Add a `ServletEndpointContext` object to the endpoint; for example `myServletEndpointContext`. The `init(Object context)` method can be set as follows:

    myServletEndpointContext = (ServletEndpointContext) context;

From then on, the business methods can access to the `HttpSession` with `myServletEndpointContext.getHttpSession()`. The first call to `getHttpSession` creates the session, if one does not already exist.

With this model, any method the client calls can get the session, set session attributes, get values from it, and so on. From then on, the client will send back the same cookie information.

For more information on the `HttpSession` object, see `http://java.sun.com/j2ee/1.4/docs/api/javax/servlet/http/HttpSession.html`

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