68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
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// Copyright 2023 Dexter.Wan. All Rights Reserved.
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// EMail: 45141961@qq.com
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#ifndef __mqtt_callback_h
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#define __mqtt_callback_h
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#include "MQTTAsync.h"
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#include "delivery_token.h"
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#include "types.h"
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#include <vector>
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#include <memory>
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namespace mqtt {
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/////////////////////////////////////////////////////////////////////////////
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/**
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* Provides a mechanism for tracking the completion of an asynchronous
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* action.
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*/
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class callback
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{
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public:
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/** Smart/shared pointer to an object of this type */
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using ptr_t = std::shared_ptr<callback>;
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/** Smart/shared pointer to a const object of this type */
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using const_ptr_t = std::shared_ptr<const callback>;
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/**
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* Virtual destructor.
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*/
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virtual ~callback() {}
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/**
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* This method is called when the client is connected.
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* Note that, in response to an initial connect(), the token from the
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* connect call is also signaled with an on_success(). That occurs just
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* before this is called.
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*/
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virtual void connected(const string& /*cause*/) {}
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/**
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* This method is called when the connection to the server is lost.
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*/
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virtual void connection_lost(const string& /*cause*/) {}
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/**
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* This method is called when a message arrives from the server.
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*/
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virtual void message_arrived(const_message_ptr /*msg*/) {}
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/**
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* Called when delivery for a message has been completed, and all
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* acknowledgments have been received.
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*/
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virtual void delivery_complete(delivery_token_ptr /*tok*/) {}
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};
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/** Smart/shared pointer to a callback object */
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using callback_ptr = callback::ptr_t;
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/** Smart/shared pointer to a const callback object */
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using const_callback_ptr = callback::const_ptr_t;
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/////////////////////////////////////////////////////////////////////////////
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// end namespace mqtt
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}
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#endif // __mqtt_callback_h
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