Sample Interceptor Example

This directory contains the sample interceptor example.  The sample interceptor example adds basic tracing to the Bank example through the interceptor API.  The code from the simple Bank example discussed earlier has not been modified, illustrating how the code for the interceptors can easily be added to existing applications.

• Implement a simple ClientInterceptor, ServerInterceptor, and BindInterceptor
• Implement factories for the ClientInterceptor and ServerInterceptor.
• Add interceptor factories (or interceptors themselves) to the ORB's chaining interceptor

Directory Contents

• Init.java
  Sample code for standard initialization for a interceptor package. It shows how to install interceptors and interceptor factories.
• SampleInterceptor.java
  Super class for all the interceptors in this sample. It has some common code shared by the sample interceptors.
• SampleClientInterceptor.java
  A sample client interceptor, which intercepts communication at client side.
• SampleClientInterceptorFactory.java
  A sample client interceptor factory, which creates client interceptors.
• SampleServerInterceptor.java
  A sample server intereptor, which intercepts communication at server side.
• SampleInterceptorFactory.java
  A sample server interceptor factory, which creates server interceptors.
• SampleBindInterceptor.java
  A sample bind interceptor, which intercepts bind process.

Used from the Bank sample

• Bank.idl

IDL interface for the 'Bank' object.

• Server.java

Server. Creates an instance of the Bank and calls org.omg.CORBA.BOA.impl_is_ready() to make this object available to client programs.  The Bank Server implementation implements two methods: open(), which opens a bank account, and balance(), which returns the balance in a person's account whose name is provided as input. A random number is generated and returned as the balance.

• Client.java

This is the bank client. It binds to an AccountManager object and invokes open() to open a bank account. It then invokes the balance() on the account object reference obtained to query the balance.

Running the sample interceptor example

To run the example, read the instructions at the interceptor directory. You will have to switch your current working directory to the interceptor directory before running the interceptor example.

Here is the sample output from the server

Installing Sample Interceptors
BindINT: bind
BindINT: exception_occurred
AccountManager object is ready.
ServINT: locate
ServINT: locate_forwarded
ServINT: receive_request
ServINT: prepare_reply
ServINT: send_reply
ServINT: request_completed
ServINT: shutdown

Here is the sample output from the client

Installing Sample Interceptors
BindINT: bind
BindINT: bind_succeeded
ClntINT: prepare_request
ClntINT: send_request
ClntINT: send_request_succeeded
ClntINT: receive_reply
The balance in Jack B. Quick's account is $6.27.