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// $Id$
// 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.
ACE_DEBUG ((LM_INFO,
" (%P|%t) Line: %d, File: %s\n",
__LINE__,
__FILE__));
}
virtual int open (void *)
{
ACE_DEBUG ((LM_INFO,
" (%P|%t) Line: %d, File: %s\n",
__LINE__,
__FILE__));
return 0;
}
virtual int open (void)
{
ACE_DEBUG ((LM_INFO,
" (%P|%t) Line: %d, File: %s\n",
__LINE__,
__FILE__));
return 0;
}
virtual ~EndTask (void)
{
}
virtual int put (ACE_Message_Block *message,
ACE_Time_Value *timeout)
{
ACE_DEBUG ((LM_INFO,
" (%P|%t) Line: %d, File: %s\n",
__LINE__,
__FILE__));
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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