| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * https://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. |
| */ |
| package org.apache.avro.ipc.jetty; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| |
| import org.apache.avro.AvroRemoteException; |
| import org.apache.avro.Protocol; |
| import org.apache.avro.Protocol.Message; |
| import org.apache.avro.ipc.HttpTransceiver; |
| import org.apache.avro.ipc.Responder; |
| import org.apache.avro.ipc.Transceiver; |
| import org.apache.avro.ipc.generic.GenericRequestor; |
| import org.apache.avro.ipc.generic.GenericResponder; |
| import org.apache.avro.ipc.stats.StatsPlugin; |
| |
| /** |
| * Naively measures overhead of using the stats plugin. |
| * |
| * The API used is the generic one. The protocol is the "null" protocol: null is |
| * sent and returned. |
| */ |
| public class StatsPluginOverhead { |
| /** Number of RPCs per iteration. */ |
| private static final int COUNT = 100000; |
| private static final Protocol NULL_PROTOCOL = Protocol.parse("{\"protocol\": \"null\", " |
| + "\"messages\": { \"null\": {" + " \"request\": [], " + " \"response\": \"null\"} } }"); |
| |
| private static class IdentityResponder extends GenericResponder { |
| public IdentityResponder(Protocol local) { |
| super(local); |
| } |
| |
| @Override |
| public Object respond(Message message, Object request) throws AvroRemoteException { |
| return request; |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| double with = sendRpcs(true) / 1000000000.0; |
| double without = sendRpcs(false) / 1000000000.0; |
| |
| System.out.println(String.format("Overhead: %f%%. RPC/s: %f (with) vs %f (without). " + "RPC time (ms): %f vs %f", |
| 100 * (with - without) / (without), COUNT / with, COUNT / without, 1000 * with / COUNT, |
| 1000 * without / COUNT)); |
| } |
| |
| /** Sends RPCs and returns nanos elapsed. */ |
| private static long sendRpcs(boolean withPlugin) throws Exception { |
| HttpServer server = createServer(withPlugin); |
| Transceiver t = new HttpTransceiver(new URL("http://127.0.0.1:" + server.getPort() + "/")); |
| GenericRequestor requestor = new GenericRequestor(NULL_PROTOCOL, t); |
| |
| long now = System.nanoTime(); |
| for (int i = 0; i < COUNT; ++i) { |
| requestor.request("null", null); |
| } |
| long elapsed = System.nanoTime() - now; |
| t.close(); |
| server.close(); |
| return elapsed; |
| } |
| |
| /** Starts an Avro server. */ |
| private static HttpServer createServer(boolean withPlugin) throws IOException { |
| Responder r = new IdentityResponder(NULL_PROTOCOL); |
| if (withPlugin) { |
| r.addRPCPlugin(new StatsPlugin()); |
| } |
| // Start Avro server |
| HttpServer server = new HttpServer(r, 0); |
| server.start(); |
| return server; |
| } |
| |
| } |