Java Web Service Constructor invocation

Question

How do you invoke a Java Web service constructor. Ideally when does constructor invocation happen while you consume the service from a client

Answer 1

You do not explictly invoke a consructor from the client. From a WebServices perspective you are invoking an operation. You have no knowledge in the client of how that operation is implemented.

The the life-cycle of your server-side object is in the hands of your specific implemenation of JAX-WS. Possibly, at the time your server starts it will instantiate one or more copies of of your service object, and so that's when your constructor is called.

In Web Services each operation is usally a "stateless" action. If you have some standard processing you need to do then you would just include that processing in your implementation.

operationAaa(String exampleParam) {
    auditLog(exampleParam);

    doAaaWork(exampleParam);
}

operationBbb(String exampleParam) {
    auditLog(exampleParam);

    doBbbWork(exampleParam);
}

Now possibly you may have the kind of processing that could be implemented in a Handler. See this article