azure-sdk-for-node/examples/samples/longpolling.js

83 строки
2.2 KiB
JavaScript

/**
* Copyright (c) Microsoft. 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.
*/
var fs = require('fs');
if (!fs.existsSync) {
fs.existsSync = require('path').existsSync;
}
var azure;
if (fs.existsSync('./../../lib/azure.js')) {
azure = require('./../../lib/azure');
} else {
azure = require('azure');
}
var util = require('util');
var topic = 'topic_1';
var subscription = 'subscription_1';
var serviceBusClient = azure.createServiceBusService();
var messageCount = 0;
function createSubscriptionAndSend(callback) {
serviceBusClient.createTopic(topic, function (error) {
if (error) {
console.log(error);
} else {
console.log('Created the topic ' + topic);
serviceBusClient.createSubscription(topic, subscription, function (error2) {
if (error2) {
console.log(error2);
} else {
console.log('Created subscription ' + subscription);
// Send a new message every 30 seconds.
setInterval(sendMessage, 30000);
callback();
}
})
}
});
}
function sendMessage() {
// Send a message to the topic
serviceBusClient.sendTopicMessage(topic, 'message' + messageCount, function (error) {
console.log('Message ' + messageCount + ' sent');
messageCount++;
});
}
function receiveMessages() {
serviceBusClient.receiveSubscriptionMessage(topic, subscription, { timeoutIntervalInS: 55 } , function (error, message) {
if (error) {
console.log(error);
} else {
console.log('Message received. Content:');
console.log(message);
}
receiveMessages();
});
}
// Initiate the publisher part
createSubscriptionAndSend(function () {
// Execute the receiver part
receiveMessages();
});