Initial checkin of gRPC to third_party/

third_party/grpc/src/node/performance/benchmark_server.js

Index: third_party/grpc/src/node/performance/benchmark_server.js
diff --git a/third_party/grpc/src/node/performance/benchmark_server.js b/third_party/grpc/src/node/performance/benchmark_server.js
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index 0000000000000000000000000000000000000000..e48acd48f5d0faef1961fae0d00b9816a11e6a3c
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+/*
+ *
+ * Copyright 2015-2016, 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.
+ *
+ */
+
+/**
+ * Benchmark server module
+ * @module
+ */
+
+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+
+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();
+  });
+}
+
+/**
+ * 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 {tls} Indicates whether TLS should be used
+ */
+function BenchmarkServer(host, port, tls) {
+  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);
+  server.addProtoService(serviceProto.BenchmarkService.service, {
+    unaryCall: unaryCall,
+    streamingCall: streamingCall
+  });
+  this.server = server;
+}
+
+/**
+ * Start the benchmark server.
+ */
+BenchmarkServer.prototype.start = function() {
+  this.server.start();
+  this.last_wall_time = process.hrtime();
+};
+
+/**
+ * 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;