azure/lib/serviceruntime/protocol1runtimeclient.js

Microsoft Azure Client Library for node

// 
// Copyright (c) Microsoft and contributors.  All rights reserved.
// 
// 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.
// 

// Module dependencies.
var EventEmitter = require('events').EventEmitter;
var util = require('util');

var azureCommon = require('azure-common');
var Constants = azureCommon.Constants;
var ServiceRuntimeConstants = Constants.ServiceRuntimeConstants;

function Protocol1RuntimeClient(goalStateClient, currentStateClient, endpoint) {
  EventEmitter.call(this);

  this.goalStateClient = goalStateClient;
  this.currentStateClient = currentStateClient;
  this.goalStateClient.endpoint = endpoint;

  this.currentGoalState = null;
  this.currentEnvironmentData = null;
}

util.inherits(Protocol1RuntimeClient, EventEmitter);

Protocol1RuntimeClient.prototype.getCurrentGoalState = function (callback) {
  this._addListeners();

  this.goalStateClient.getCurrentGoalState(callback);
};

Protocol1RuntimeClient.prototype.getRoleEnvironmentData = function (callback) {
  this._addListeners();

  this.goalStateClient.getRoleEnvironmentData(callback);
};

Protocol1RuntimeClient.prototype.setCurrentState = function (state, callback) {
  this._addListeners();

  this.currentStateClient.setCurrentState(state, callback);
};

Protocol1RuntimeClient.prototype._addListeners = function () {
  var self = this;
  if (this.goalStateClient.listeners(ServiceRuntimeConstants.CHANGED).length === 0) {
    this.goalStateClient.on(ServiceRuntimeConstants.CHANGED, function (currentGoalState) {
      self.emit(ServiceRuntimeConstants.CHANGED, currentGoalState);
    });
  }
};

module.exports = Protocol1RuntimeClient;