| /* |
| * |
| * Copyright 2016 gRPC authors. |
| * |
| * 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. |
| * |
| */ |
| |
| 'use strict'; |
| |
| var _ = require('lodash'); |
| |
| var grpc = require('../../..'); |
| |
| var proto = grpc.load(__dirname + '/../../proto/grpc/testing/metrics.proto'); |
| var metrics = proto.grpc.testing; |
| |
| function getGauge(call, callback) { |
| /* jshint validthis: true */ |
| // Should be bound to a MetricsServer object |
| var name = call.request.name; |
| if (this.gauges.hasOwnProperty(name)) { |
| callback(null, _.assign({name: name}, this.gauges[name]())); |
| } else { |
| callback({code: grpc.status.NOT_FOUND, |
| details: 'No such gauge: ' + name}); |
| } |
| } |
| |
| function getAllGauges(call) { |
| /* jshint validthis: true */ |
| // Should be bound to a MetricsServer object |
| _.each(this.gauges, function(getter, name) { |
| call.write(_.assign({name: name}, getter())); |
| }); |
| call.end(); |
| } |
| |
| function MetricsServer(port) { |
| var server = new grpc.Server(); |
| server.addService(metrics.MetricsService.service, { |
| getGauge: _.bind(getGauge, this), |
| getAllGauges: _.bind(getAllGauges, this) |
| }); |
| server.bind('localhost:' + port, grpc.ServerCredentials.createInsecure()); |
| this.server = server; |
| this.gauges = {}; |
| } |
| |
| MetricsServer.prototype.start = function() { |
| this.server.start(); |
| } |
| |
| MetricsServer.prototype.registerGauge = function(name, getter) { |
| this.gauges[name] = getter; |
| }; |
| |
| MetricsServer.prototype.shutdown = function() { |
| this.server.forceShutdown(); |
| }; |
| |
| module.exports = MetricsServer; |