| /* |
| * 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 |
| * |
| * 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 org.apache.cassandra.net.proxy; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.function.Consumer; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import io.netty.bootstrap.Bootstrap; |
| import io.netty.bootstrap.ServerBootstrap; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.Unpooled; |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.ChannelInboundHandlerAdapter; |
| import io.netty.channel.ChannelInitializer; |
| import io.netty.channel.ChannelOption; |
| import io.netty.channel.EventLoopGroup; |
| import io.netty.channel.local.LocalAddress; |
| import io.netty.channel.local.LocalChannel; |
| import io.netty.channel.local.LocalServerChannel; |
| import io.netty.channel.nio.NioEventLoopGroup; |
| import io.netty.handler.logging.LogLevel; |
| import io.netty.handler.logging.LoggingHandler; |
| |
| public class ProxyHandlerTest |
| { |
| private final Object PAYLOAD = new Object(); |
| |
| @Test |
| public void testLatency() throws Throwable |
| { |
| test((proxyHandler, testHandler, channel) -> { |
| int count = 1; |
| long latency = 100; |
| CountDownLatch latch = new CountDownLatch(count); |
| long start = System.currentTimeMillis(); |
| testHandler.onRead = new Consumer<Object>() |
| { |
| int last = -1; |
| public void accept(Object o) |
| { |
| // Make sure that order is preserved |
| Assert.assertEquals(last + 1, o); |
| last = (int) o; |
| |
| long elapsed = System.currentTimeMillis() - start; |
| Assert.assertTrue("Latency was:" + elapsed, elapsed > latency); |
| latch.countDown(); |
| } |
| }; |
| |
| proxyHandler.withLatency(latency, TimeUnit.MILLISECONDS); |
| |
| for (int i = 0; i < count; i++) |
| { |
| ByteBuf bb = Unpooled.buffer(Integer.BYTES); |
| bb.writeInt(i); |
| channel.writeAndFlush(i); |
| } |
| |
| Assert.assertTrue(latch.await(10, TimeUnit.SECONDS)); |
| }); |
| } |
| |
| @Test |
| public void testNormalDelivery() throws Throwable |
| { |
| test((proxyHandler, testHandler, channelPipeline) -> { |
| int count = 10; |
| CountDownLatch latch = new CountDownLatch(count); |
| AtomicLong end = new AtomicLong(); |
| testHandler.onRead = (o) -> { |
| end.set(System.currentTimeMillis()); |
| latch.countDown(); |
| }; |
| |
| for (int i = 0; i < count; i++) |
| channelPipeline.writeAndFlush(PAYLOAD); |
| Assert.assertTrue(latch.await(10, TimeUnit.SECONDS)); |
| |
| }); |
| } |
| |
| @Test |
| public void testLatencyForMany() throws Throwable |
| { |
| class Event { |
| private final long latency; |
| private final long start; |
| private final int idx; |
| |
| Event(long latency, int idx) |
| { |
| this.latency = latency; |
| this.start = System.currentTimeMillis(); |
| this.idx = idx; |
| } |
| } |
| |
| test((proxyHandler, testHandler, channel) -> { |
| int count = 150; |
| CountDownLatch latch = new CountDownLatch(count); |
| AtomicInteger counter = new AtomicInteger(); |
| testHandler.onRead = new Consumer<Object>() |
| { |
| int lastSeen = -1; |
| public void accept(Object o) |
| { |
| Event e = (Event) o; |
| Assert.assertEquals(lastSeen + 1, e.idx); |
| lastSeen = e.idx; |
| long elapsed = System.currentTimeMillis() - e.start; |
| Assert.assertTrue(elapsed >= e.latency); |
| counter.incrementAndGet(); |
| latch.countDown(); |
| } |
| }; |
| |
| int idx = 0; |
| for (int i = 0; i < count / 3; i++) |
| { |
| for (long latency : new long[]{ 100, 200, 0 }) |
| { |
| proxyHandler.withLatency(latency, TimeUnit.MILLISECONDS); |
| CountDownLatch read = new CountDownLatch(1); |
| proxyHandler.onRead(read::countDown); |
| channel.writeAndFlush(new Event(latency, idx++)); |
| Assert.assertTrue(read.await(10, TimeUnit.SECONDS)); |
| } |
| } |
| |
| Assert.assertTrue(latch.await(10, TimeUnit.SECONDS)); |
| Assert.assertEquals(counter.get(), count); |
| }); |
| } |
| |
| private interface DoTest |
| { |
| public void doTest(InboundProxyHandler.Controller proxy, TestHandler testHandler, Channel channel) throws Throwable; |
| } |
| |
| |
| public void test(DoTest test) throws Throwable |
| { |
| EventLoopGroup serverGroup = new NioEventLoopGroup(1); |
| EventLoopGroup clientGroup = new NioEventLoopGroup(1); |
| |
| InboundProxyHandler.Controller controller = new InboundProxyHandler.Controller(); |
| InboundProxyHandler proxyHandler = new InboundProxyHandler(controller); |
| TestHandler testHandler = new TestHandler(); |
| |
| ServerBootstrap sb = new ServerBootstrap(); |
| sb.group(serverGroup) |
| .channel(LocalServerChannel.class) |
| .childHandler(new ChannelInitializer<LocalChannel>() { |
| @Override |
| public void initChannel(LocalChannel ch) |
| { |
| ch.pipeline() |
| .addLast(proxyHandler) |
| .addLast(testHandler); |
| } |
| }) |
| .childOption(ChannelOption.AUTO_READ, false); |
| |
| Bootstrap cb = new Bootstrap(); |
| cb.group(clientGroup) |
| .channel(LocalChannel.class) |
| .handler(new ChannelInitializer<LocalChannel>() { |
| @Override |
| public void initChannel(LocalChannel ch) throws Exception { |
| ch.pipeline() |
| .addLast(new LoggingHandler(LogLevel.TRACE)); |
| } |
| }); |
| |
| final LocalAddress addr = new LocalAddress("test"); |
| |
| Channel serverChannel = sb.bind(addr).sync().channel(); |
| |
| Channel clientChannel = cb.connect(addr).sync().channel(); |
| test.doTest(controller, testHandler, clientChannel); |
| |
| clientChannel.close(); |
| serverChannel.close(); |
| serverGroup.shutdownGracefully(); |
| clientGroup.shutdownGracefully(); |
| } |
| |
| |
| public static class TestHandler extends ChannelInboundHandlerAdapter |
| { |
| private Consumer<Object> onRead = (o) -> {}; |
| @Override |
| public void channelRead(ChannelHandlerContext ctx, Object msg) |
| { |
| onRead.accept(msg); |
| } |
| } |
| } |