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// $Id$
// EndTask.h
//
// Tutorial regarding a way to use ACE_Stream.
//
// written by bob mcwhirter (bob@netwrench.com)
//
//
#ifndef ENDTASK_H
#define ENDTASK_H
#include "Task.h"
// When you setup a Stream and push your modules on,
// there are two additional modules that go unseen
// by the user.
//
// The Stream pushes on a Stream_Head in front of
// your first module, and a Stream_Tail behind your
// last module.
//
// If your put() a message to the Stream Tail, it
// assumes you did so in error. This simple EndTask
// class allows you to push a message to it and just
// have it safely Go Away.
//
// All this Task does is release the Message_Block
// and return 0. It's a suitable black-hole.
class EndTask : public Task
{
public:
typedef Task inherited;
EndTask(const char *nameOfTask) :
inherited(nameOfTask, 0) {
// when we get open()'d, it with 0 threads
// since there is actually no processing to do.
cerr << __LINE__ << " " << __FILE__ << endl;
};
virtual int open(void *)
{
cerr << __LINE__ << " " << __FILE__ << endl;
return 0;
}
virtual int open(void)
{
cerr << __LINE__ << " " << __FILE__ << endl;
return 0;
}
virtual ~EndTask(void) {
};
virtual int put(ACE_Message_Block *message,
ACE_Time_Value *timeout) {
cerr << __LINE__ << " " << __FILE__ << endl;
ACE_UNUSED_ARG(timeout);
// we don't have anything to do, so
// release() the message.
ACE_DEBUG ((LM_DEBUG, "(%P|%t) %s EndTask::put() -- releasing Message_Block\n", this->nameOfTask()));
message->release();
return 0;
};
};
#endif // ENDTASK_H
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