PNGCallback Class Reference

The call back object for the Put and Get AMI. More...

#include <DM_Client.h>

List of all members.

Public Member Functions

 PNGCallback (Synchronizer_Helper &sync_helper, int num_msgs)
 The sync_helper and the max num of msgs to track.
 ~PNGCallback ()
bool wait_till_done (int msg_id)
 Wait till the server responds to msg with id msg_id.
void set_done (int msg_id, bool status)
 set or clear the status flag for a particular msg_id
int num_synchs ()
 Provides the number of completed AMI callbacks.
void finished (const Ice::AsyncResultPtr &r)

Detailed Description

The call back object for the Put and Get AMI.

Ice calls the finished method once the AMI completes. The client is not tied to any particular call back. The actual call back is provided by a helper class, the sync_helper whose end method is called to complete the full AMI call.

This call back class also doubles up as a rate limiter implementing a sliding window mechanism for sending messages to the server.

Given a max number of msgs, it creates an array to track the status of the msgs that have been sent to the server

It provides a monitor based wait mechanism for the client which can wait till the server responds back to a particular msg. We take the liberty of making a fcfs assumption on the server side processing for keeping things simple.


Constructor & Destructor Documentation

PNGCallback::PNGCallback ( Synchronizer_Helper sync_helper,
int  num_msgs 
) [inline]

The sync_helper and the max num of msgs to track.

PNGCallback::~PNGCallback (  )  [inline]

Member Function Documentation

void PNGCallback::finished ( const Ice::AsyncResultPtr &  r  )  [inline]

This method is called by Ice run time when the server responds. We do some bookkeeping and delegate the task of actually completing the AMI by calling sync_helper.end method

int PNGCallback::num_synchs (  )  [inline]

Provides the number of completed AMI callbacks.

void PNGCallback::set_done ( int  msg_id,
bool  status 
) [inline]

set or clear the status flag for a particular msg_id

bool PNGCallback::wait_till_done ( int  msg_id  )  [inline]

Wait till the server responds to msg with id msg_id.


The documentation for this class was generated from the following file:
Generated on Tue Jul 19 11:45:27 2011 for Y!LDA by  doxygen 1.6.3