Implementing Quoter Components with DAnCE
We
  discuss this section after the PICML modeling only because we
  would like to focus our attention more on the modeling stage. It
  does not indicate that the implementation of components has to be
  subsequent to the work we've done under GME. They are totally
  orthogonal to each other. In fact, they are so orthogonal 
  that we won't go into details as to how DAnCE programming should
  be done. We'll briefly go through the functionality of each
  component and provides the links to their implementations
  respectively. For a hands on experience on DAnCE programming,
  please refer to $CIAO_ROOT/examples/Hello.
  
  Broker Component
      The Broker component
  waits to be notified by the Distributor component about stock
  changes. When a stock change event arrives,  it will go back
  to Distributor component and retrieve the information it interest
  in and output them to the console. The users are allowed to
  subscribe to the interested stock value through the interface
  supported by Broker component. Here's the complete version of
  Broker_exec.h
  and Broker_exec.cpp.
  
  Distributor Component
     The Distributor component
  monitors the real time stock database and publishes events
  whenever it detects stock change. In our program, we use a
  ACE_Task  to simulate this real-life activity. The task
  will run in a separate thread and periodically increment the
  stock value by 1. In the same time the stock value is
  incremented, an StockName event along with the name
  of the changed stock will be sent. Here's the complete version of
  Distributor_exec.h
  and Distributor_exec.cpp
  
  Broker client
      The Broker client program
  is the driver program for client to control Broker component,
  subscribe and unsubscribe to a specific stock. Here's the
  complete version of Broker.cpp
  
  Distributor client
       The Distributor
  client program is the driver program for client to control
  Distributor component, turn on and off the distribution service,
  set up the frequency, etc. Here's the complete version of
  Distributor.cpp
  
  
  
    Ming Xiong
  
  
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