88 lines
2.6 KiB
JavaScript
88 lines
2.6 KiB
JavaScript
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/*
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* Copyright © 2016-2020 The Thingsboard Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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const config = require('config'),
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JsInvokeMessageProcessor = require('../api/jsInvokeMessageProcessor'),
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logger = require('../config/logger')._logger('pubSubTemplate');
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const {PubSub} = require('@google-cloud/pubsub');
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const projectId = config.get('pubsub.project_id');
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const credentials = JSON.parse(config.get('pubsub.service_account'));
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const requestTopic = config.get('request_topic');
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let pubSubClient;
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function PubSubProducer() {
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this.send = async (responseTopic, scriptId, rawResponse, headers) => {
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let data = JSON.stringify(
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{
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key: scriptId,
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data: [...rawResponse],
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headers: headers
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});
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let dataBuffer = Buffer.from(data);
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return pubSubClient.topic(responseTopic).publish(dataBuffer);
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}
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}
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(async () => {
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try {
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logger.info('Starting ThingsBoard JavaScript Executor Microservice...');
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pubSubClient = new PubSub({projectId: projectId, credentials: credentials});
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const subscription = pubSubClient.subscription(requestTopic);
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const messageProcessor = new JsInvokeMessageProcessor(new PubSubProducer());
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const messageHandler = message => {
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messageProcessor.onJsInvokeMessage(message.data.toString('utf8'));
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message.ack();
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};
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subscription.on('message', messageHandler);
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} catch (e) {
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logger.error('Failed to start ThingsBoard JavaScript Executor Microservice: %s', e.message);
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logger.error(e.stack);
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exit(-1);
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}
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})();
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process.on('exit', () => {
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exit(0);
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});
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async function exit(status) {
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logger.info('Exiting with status: %d ...', status);
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if (pubSubClient) {
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logger.info('Stopping Pub/Sub client.')
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try {
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await pubSubClient.close();
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logger.info('Pub/Sub client is stopped.')
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process.exit(status);
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} catch (e) {
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logger.info('Pub/Sub client stop error.');
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process.exit(status);
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}
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} else {
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process.exit(status);
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}
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}
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