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/*
*
* 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;
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