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/* -*- C++ -*- */
// $Id$
#ifndef _SUPPLIER_ROUTER_H
#define _SUPPLIER_ROUTER_H
#include "ace/INET_Addr.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/SOCK_Acceptor.h"
#include "ace/Map_Manager.h"
#include "ace/Svc_Handler.h"
#include "Peer_Router.h"
class Supplier_Router : public Peer_Router
{
// = TITLE
// Provides the interface between one or more Suppliers and the
// Event Server ACE_Stream.
//
// = DESCRIPTION
// This class normally sits on "bottom" of the Stream and sends
// all messages coming from Suppliers via its "write" <Task>
// "upstream" to all the Consumers connected to the
// <Consumer_Router>. Normally, the messages flow up the
// stream to <Consumer_Router>s. However, if Consumers
// transmit data to the <Consumer_Router>, we dutifully push it
// out to the Suppliers via the <Supplier_Router>.
//
// When used on the "reader" side of a Stream, the
// <Supplier_Router> simply forwards all messages up the stream.
// When used on the "writer" side, the <Supplier_Router> queues
// up outgoing messages to suppliers and sends them in a
// separate thread. The reason for this is that it's really an
// "error" for a <Supplier_Router> to send messages to
// Suppliers, so we don't expect this to happen very much. When
// it does we use a separate thread to avoid taxing the main
// thread, which processes "normal" messages.
//
// All of these methods are called via base class pointers by
// the <ACE_Stream> apparatus. Therefore, we can put them in
// the protected section.
public:
Supplier_Router (Peer_Router_Context *prc);
// Initialization method.
protected:
// = ACE_Task hooks.
virtual int open (void *a = 0);
// Called by the Stream to initialize the router.
virtual int close (u_long flags = 0);
// Called by the Stream to shutdown the router.
virtual int put (ACE_Message_Block *msg, ACE_Time_Value * = 0);
// Called by the <SUPPLIER_HANDLER> to pass a message to the Router.
// The Router queues up this message, which is then processed in the
// <svc> method in a separate thread.
virtual int svc (void);
// Runs in a separate thread to dequeue messages and pass them up
// the stream.
virtual int info (char **info_string, size_t length) const;
// Dynamic linking hook.
};
#endif /* _SUPPLIER_ROUTER_H */
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