+++ /dev/null
-/**
- * Copyright 2013 IBM Corp.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- **/
-var util = require("util");
-var mqtt = require("mqtt");
-var events = require("events");
-//var inspect = require("sys").inspect;
-
-//var Client = module.exports.Client = function(
-
-var port = 1883;
-var host = "localhost";
-
-function MQTTClient(port,host) {
- this.port = port||1883;
- this.host = host||"localhost";
- this.messageId = 1;
- this.pendingSubscriptions = {};
- this.inboundMessages = {};
- this.lastOutbound = (new Date()).getTime();
- this.lastInbound = (new Date()).getTime();
- this.connected = false;
-
- this._nextMessageId = function() {
- this.messageId += 1;
- if (this.messageId > 0xFFFF) {
- this.messageId = 1;
- }
- return this.messageId;
- }
- events.EventEmitter.call(this);
-}
-util.inherits(MQTTClient, events.EventEmitter);
-
-MQTTClient.prototype.connect = function(options) {
- if (!this.connected) {
- var self = this;
- options = options||{};
- self.options = options;
- self.options.keepalive = options.keepalive||15;
- self.options.clean = self.options.clean||true;
- self.options.protocolId = 'MQIsdp';
- self.options.protocolVersion = 3;
-
- self.client = mqtt.createConnection(this.port,this.host,function(err,client) {
- if (err) {
- self.connected = false;
- clearInterval(self.watchdog);
- self.connectionError = true;
- //util.log('[mqtt] ['+self.uid+'] connection error 1 : '+inspect(err));
- self.emit('connectionlost',err);
- return;
- }
- client.on('close',function(e) {
- //util.log('[mqtt] ['+self.uid+'] on close');
- clearInterval(self.watchdog);
- if (!self.connectionError) {
- if (self.connected) {
- self.connected = false;
- self.emit('connectionlost',e);
- } else {
- self.emit('disconnect');
- }
- }
- });
- client.on('error',function(e) {
- //util.log('[mqtt] ['+self.uid+'] on error : '+inspect(e));
- clearInterval(self.watchdog);
- if (self.connected) {
- self.connected = false;
- self.emit('connectionlost',e);
- }
- });
- client.on('connack',function(packet) {
- if (packet.returnCode == 0) {
- self.watchdog = setInterval(function(self) {
- var now = (new Date()).getTime();
-
- //util.log('[mqtt] ['+self.uid+'] watchdog '+inspect({connected:self.connected,connectionError:self.connectionError,pingOutstanding:self.pingOutstanding,now:now,lastOutbound:self.lastOutbound,lastInbound:self.lastInbound}));
-
- if (now - self.lastOutbound > self.options.keepalive*500 || now - self.lastInbound > self.options.keepalive*500) {
- if (self.pingOutstanding) {
- //util.log('[mqtt] ['+self.uid+'] watchdog pingOustanding - disconnect');
- try {
- self.client.disconnect();
- } catch (err) {
- }
- } else {
- //util.log('[mqtt] ['+self.uid+'] watchdog pinging');
- self.lastOutbound = (new Date()).getTime();
- self.lastInbound = (new Date()).getTime();
- self.pingOutstanding = true;
- self.client.pingreq();
- }
- }
-
- },self.options.keepalive*500,self);
- self.pingOutstanding = false;
- self.lastInbound = (new Date()).getTime()
- self.lastOutbound = (new Date()).getTime()
- self.connected = true;
- self.connectionError = false;
- self.emit('connect');
- } else {
- self.connected = false;
- self.emit('connectionlost');
- }
- });
- client.on('suback',function(packet) {
- self.lastInbound = (new Date()).getTime()
- var topic = self.pendingSubscriptions[packet.messageId];
- self.emit('subscribe',topic,packet.granted[0]);
- delete self.pendingSubscriptions[packet.messageId];
- });
- client.on('unsuback',function(packet) {
- self.lastInbound = (new Date()).getTime()
- var topic = self.pendingSubscriptions[packet.messageId];
- self.emit('unsubscribe',topic,packet.granted[0]);
- delete self.pendingSubscriptions[packet.messageId];
- });
- client.on('publish',function(packet) {
- self.lastInbound = (new Date()).getTime()
- if (packet.qos < 2) {
- var p = packet;
- self.emit('message',p.topic,p.payload,p.qos,p.retain);
- } else {
- self.inboundMessages[packet.messageId] = packet;
- this.lastOutbound = (new Date()).getTime()
- self.client.pubrec(packet);
- }
- if (packet.qos == 1) {
- this.lastOutbound = (new Date()).getTime()
- self.client.puback(packet);
- }
- });
-
- client.on('pubrel',function(packet) {
- self.lastInbound = (new Date()).getTime()
- var p = self.inboundMessages[packet.messageId];
- if (p) {
- self.emit('message',p.topic,p.payload,p.qos,p.retain);
- delete self.inboundMessages[packet.messageId];
- }
- self.lastOutbound = (new Date()).getTime()
- self.client.pubcomp(packet);
- });
-
- client.on('puback',function(packet) {
- self.lastInbound = (new Date()).getTime()
- // outbound qos-1 complete
- });
-
- client.on('pubrec',function(packet) {
- self.lastInbound = (new Date()).getTime()
- self.lastOutbound = (new Date()).getTime()
- self.client.pubrel(packet);
- });
- client.on('pubcomp',function(packet) {
- self.lastInbound = (new Date()).getTime()
- // outbound qos-2 complete
- });
- client.on('pingresp',function(packet) {
- //util.log('[mqtt] ['+self.uid+'] received pingresp');
- self.lastInbound = (new Date()).getTime()
- self.pingOutstanding = false;
- });
-
- this.lastOutbound = (new Date()).getTime()
- this.connectionError = false;
- client.connect(self.options);
- });
- }
-}
-
-MQTTClient.prototype.subscribe = function(topic,qos) {
- var self = this;
- if (self.connected) {
- var options = {
- subscriptions:[{topic:topic,qos:qos}],
- messageId: self._nextMessageId()
- };
- this.pendingSubscriptions[options.messageId] = topic;
- this.lastOutbound = (new Date()).getTime()
- self.client.subscribe(options);
- }
-}
-MQTTClient.prototype.unsubscribe = function(topic) {
- var self = this;
- if (self.connected) {
- var options = {
- topic:topic,
- messageId: self._nextMessageId()
- };
- this.pendingSubscriptions[options.messageId] = topic;
- this.lastOutbound = (new Date()).getTime()
- self.client.unsubscribe(options);
- }
-}
-
-MQTTClient.prototype.publish = function(topic,payload,qos,retain) {
- var self = this;
- if (self.connected) {
-
- if (!Buffer.isBuffer(payload)) {
- if (typeof payload === "object") {
- payload = JSON.stringify(payload);
- } else if (typeof payload !== "string") {
- payload = ""+payload;
- }
- }
- var options = {
- topic: topic,
- payload: payload,
- qos: qos||0,
- retain:retain||false
- };
- if (options.qos != 0) {
- options.messageId = self._nextMessageId();
- }
- this.lastOutbound = (new Date()).getTime()
- self.client.publish(options);
- }
-}
-
-MQTTClient.prototype.disconnect = function() {
- var self = this;
- if (this.connected) {
- this.connected = false;
- try {
- this.client.disconnect();
- } catch(err) {
- }
- }
-}
-MQTTClient.prototype.isConnected = function() {
- return this.connected;
-}
-module.exports.createClient = function(port,host) {
- var mqtt_client = new MQTTClient(port,host);
- return mqtt_client;
-}
-
Code Review / sdnc / oam.git / blobdiff