Java tutorial
/* * Copyright 2014 The Netty Project * * The Netty Project 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 com.flysoloing.learning.network.netty.binary; import io.netty.bootstrap.Bootstrap; import io.netty.channel.*; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioSocketChannel; import io.netty.handler.codec.memcache.binary.BinaryMemcacheClientCodec; import io.netty.handler.codec.memcache.binary.BinaryMemcacheObjectAggregator; import io.netty.handler.ssl.SslContext; import io.netty.handler.ssl.SslContextBuilder; import io.netty.handler.ssl.util.InsecureTrustManagerFactory; import java.io.BufferedReader; import java.io.InputStreamReader; /** * Simple memcache client that demonstrates get and set commands against a memcache server. */ public final class MemcacheClient { static final boolean SSL = System.getProperty("ssl") != null; static final String HOST = System.getProperty("host", "127.0.0.1"); static final int PORT = Integer.parseInt(System.getProperty("port", "11211")); public static void main(String[] args) throws Exception { // Configure SSL. final SslContext sslCtx; if (SSL) { sslCtx = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build(); } else { sslCtx = null; } EventLoopGroup group = new NioEventLoopGroup(); try { Bootstrap b = new Bootstrap(); b.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() { @Override protected void initChannel(SocketChannel ch) throws Exception { ChannelPipeline p = ch.pipeline(); if (sslCtx != null) { p.addLast(sslCtx.newHandler(ch.alloc(), HOST, PORT)); } p.addLast(new BinaryMemcacheClientCodec()); p.addLast(new BinaryMemcacheObjectAggregator(Integer.MAX_VALUE)); p.addLast(new MemcacheClientHandler()); } }); // Start the connection attempt. Channel ch = b.connect(HOST, PORT).sync().channel(); // Read commands from the stdin. System.out.println("Enter commands (quit to end)"); System.out.println("get <key>"); System.out.println("set <key> <value>"); ChannelFuture lastWriteFuture = null; BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); for (;;) { String line = in.readLine(); if (line == null) { break; } if ("quit".equals(line.toLowerCase())) { ch.close().sync(); break; } // Sends the received line to the server. lastWriteFuture = ch.writeAndFlush(line); } // Wait until all messages are flushed before closing the channel. if (lastWriteFuture != null) { lastWriteFuture.sync(); } } finally { group.shutdownGracefully(); } } }