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/*
*
* Copyright 2015, 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.
*
*/
/**
* Benchmark server module
* @module
*/
'use strict';
var fs = require('fs');
var path = require('path');
var EventEmitter = require('events');
var util = require('util');
var genericService = require('./generic_service');
var grpc = require('../../../');
var serviceProto = grpc.load({
root: __dirname + '/../../..',
file: 'src/proto/grpc/testing/services.proto'}).grpc.testing;
/**
* Create a buffer filled with size zeroes
* @param {number} size The length of the buffer
* @return {Buffer} The new buffer
*/
function zeroBuffer(size) {
var zeros = new Buffer(size);
zeros.fill(0);
return zeros;
}
/**
* Handler for the unary benchmark method. Simply responds with a payload
* containing the requested number of zero bytes.
* @param {Call} call The call object to be handled
* @param {function} callback The callback to call with the response
*/
function unaryCall(call, callback) {
var req = call.request;
var payload = {body: zeroBuffer(req.response_size)};
callback(null, {payload: payload});
}
/**
* Handler for the streaming benchmark method. Simply responds to each request
* with a payload containing the requested number of zero bytes.
* @param {Call} call The call object to be handled
*/
function streamingCall(call) {
call.on('data', function(value) {
var payload = {body: zeroBuffer(value.response_size)};
call.write({payload: payload});
});
call.on('end', function() {
call.end();
});
}
function makeUnaryGenericCall(response_size) {
var response = zeroBuffer(response_size);
return function unaryGenericCall(call, callback) {
callback(null, response);
};
}
function makeStreamingGenericCall(response_size) {
var response = zeroBuffer(response_size);
return function streamingGenericCall(call) {
call.on('data', function(value) {
call.write(response);
});
call.on('end', function() {
call.end();
});
};
}
/**
* BenchmarkServer class. Constructed based on parameters from the driver and
* stores statistics.
* @param {string} host The host to serve on
* @param {number} port The port to listen to
* @param {boolean} tls Indicates whether TLS should be used
* @param {boolean} generic Indicates whether to use the generic service
* @param {number=} response_size The response size for the generic service
*/
function BenchmarkServer(host, port, tls, generic, response_size) {
var server_creds;
var host_override;
if (tls) {
var key_path = path.join(__dirname, '../test/data/server1.key');
var pem_path = path.join(__dirname, '../test/data/server1.pem');
var key_data = fs.readFileSync(key_path);
var pem_data = fs.readFileSync(pem_path);
server_creds = grpc.ServerCredentials.createSsl(null,
[{private_key: key_data,
cert_chain: pem_data}]);
} else {
server_creds = grpc.ServerCredentials.createInsecure();
}
var server = new grpc.Server();
this.port = server.bind(host + ':' + port, server_creds);
if (generic) {
server.addService(genericService, {
unaryCall: makeUnaryGenericCall(response_size),
streamingCall: makeStreamingGenericCall(response_size)
});
} else {
server.addService(serviceProto.BenchmarkService.service, {
unaryCall: unaryCall,
streamingCall: streamingCall
});
}
this.server = server;
}
util.inherits(BenchmarkServer, EventEmitter);
/**
* Start the benchmark server.
*/
BenchmarkServer.prototype.start = function() {
this.server.start();
this.last_wall_time = process.hrtime();
this.emit('started');
};
/**
* Return the port number that the server is bound to.
* @return {Number} The port number
*/
BenchmarkServer.prototype.getPort = function() {
return this.port;
};
/**
* Return current statistics for the server. If reset is set, restart
* statistic collection.
* @param {boolean} reset Indicates that statistics should be reset
* @return {object} Server statistics
*/
BenchmarkServer.prototype.mark = function(reset) {
var wall_time_diff = process.hrtime(this.last_wall_time);
if (reset) {
this.last_wall_time = process.hrtime();
}
return {
time_elapsed: wall_time_diff[0] + wall_time_diff[1] / 1e9,
// Not sure how to measure these values
time_user: 0,
time_system: 0
};
};
/**
* Stop the server.
* @param {function} callback Called when the server has finished shutting down
*/
BenchmarkServer.prototype.stop = function(callback) {
this.server.tryShutdown(callback);
};
module.exports = BenchmarkServer;
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