| /* |
| * |
| * Copyright 2016, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| '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.addProtoService(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; |