Java tutorial
/* * Copyright 2016 The gRPC Authors * * Licensed 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 * * http://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 io.grpc.netty; import io.grpc.InternalKnownTransport; import io.grpc.InternalMethodDescriptor; import io.grpc.MethodDescriptor; import io.netty.util.AsciiString; import java.io.ByteArrayInputStream; import java.io.InputStream; import java.util.concurrent.TimeUnit; import org.openjdk.jmh.annotations.Benchmark; import org.openjdk.jmh.annotations.BenchmarkMode; import org.openjdk.jmh.annotations.Mode; import org.openjdk.jmh.annotations.OutputTimeUnit; import org.openjdk.jmh.annotations.Scope; import org.openjdk.jmh.annotations.State; /** * Benchmark for Method Descriptors. */ @State(Scope.Benchmark) public class MethodDescriptorBenchmark { private static final MethodDescriptor.Marshaller<Void> marshaller = new MethodDescriptor.Marshaller<Void>() { @Override public InputStream stream(Void value) { return new ByteArrayInputStream(new byte[] {}); } @Override public Void parse(InputStream stream) { return null; } }; MethodDescriptor<Void, Void> method = MethodDescriptor.<Void, Void>newBuilder() .setType(MethodDescriptor.MethodType.UNARY).setFullMethodName("Service/Method") .setRequestMarshaller(marshaller).setResponseMarshaller(marshaller).build(); InternalMethodDescriptor imd = new InternalMethodDescriptor(InternalKnownTransport.NETTY); byte[] directBytes = new AsciiString("/" + method.getFullMethodName()).toByteArray(); /** Foo bar. */ @Benchmark @BenchmarkMode(Mode.SampleTime) @OutputTimeUnit(TimeUnit.NANOSECONDS) public AsciiString old() { return new AsciiString("/" + method.getFullMethodName()); } /** Foo bar. */ @Benchmark @BenchmarkMode(Mode.SampleTime) @OutputTimeUnit(TimeUnit.NANOSECONDS) public AsciiString transportSpecific() { AsciiString path; if ((path = (AsciiString) imd.geRawMethodName(method)) != null) { path = new AsciiString("/" + method.getFullMethodName()); imd.setRawMethodName(method, path); } return path; } /** Foo bar. */ @Benchmark @BenchmarkMode(Mode.SampleTime) @OutputTimeUnit(TimeUnit.NANOSECONDS) public AsciiString direct() { return new AsciiString(directBytes, false); } }