The Timer Interceptor example

This directory contains the timer interceptor example.  The timer interceptor example demonstrates how to use the Closure class to pass data between interceptors.  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 a factories for the ClientInterceptor and ServerInterceptor.
• Use the initializers to install the interceptors when VisiBroker is initialized
• Add interceptor factories (or interceptors themselves) to the ORB's chaining interceptor

The timer example shows how to use the org.omg.CORBA.Closure class to pass data between interceptor points.

Directory Contents

• Init.java
  Sample code for standard initialization for a interceptor package. It shows how to install interceptors and interceptor factories .
• TimerInterceptor.java
  Super class for all the interceptors in this sample. It has some common code shared by the sample interceptors.
• TimerClientInterceptor.java
  A sample client interceptor, which intercepts communication at client side. It also shows how to use Closure to pass information between interceptor calls.
• TimerServerinterceptor.java
  A sample client interceptor factory, which creates client interceptors. It also shows how to use Closure to pass information between interceptor calls.
• TimerClientInterceptorFactory.java
  A sample client interceptor factory, which creates client interceptors.
• TimerServerInterceptorFactory.java
  A sample server interceptor factory, which creates server interceptors.
• TimerData.java
  Used by interceptors to pass time information between interceptor calls.
• TwoTimerData.java
  Used by interceptors to pass multiple time information between interceptor calls.

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 timer interceptor example

To run the example, read the instructions at the interceptor directory.

Here is the sample output from the server

Installing Timer Interceptors
AccountManager object is ready.
locate: 40 ms
balance: (process time) - 70 ms
balance: (prepare response) - 0 ms
balance: (send time) - 0 ms
balance: (total call) - 70 ms

Here is the sample output from the client

Installing Timer Interceptors
bind: 2 s, 503 ms
balance: (prepare time) - 70 ms
balance: (send time) - 0 ms
balance: (receive time) - 390 ms
balance: (total call) - 460 ms

The balance in Jack B. Quick's account is $94.89.