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coderbruiscoderbruis
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add netty
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‎.gitignore‎

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@@ -6,9 +6,11 @@ JdkLearn/learnjava.iml
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Spring-Boot/learnsb.iml
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Spring/learnspring.iml
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Spring-AOP/learnaop.iml
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Spring-Netty/Spring-Netty.iml
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# target
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JdkLearn/target
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Spring/target
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Spring-AOP/target
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Spring-Boot/target
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Spring-Netty/target

‎README.md‎

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- [深入SpringBoot源码学习之——SpringFactoriesLoader](https://blog.csdn.net/CoderBruis/article/details/106559304)
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- [深入SpringBoot源码学习之——系统初始化器](https://blog.csdn.net/CoderBruis/article/details/106610007)
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)
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‎Spring-Netty/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.2.1.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.bruis</groupId>
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<artifactId>learnnetty</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>learnnetty</name>
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<description>Project for Learn Netty</description>
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<properties>
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<java.version>1.8</java.version>
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<netty-all.version>4.1.6.Final</netty-all.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>io.netty</groupId>
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<artifactId>netty-all</artifactId>
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<version>${netty-all.version}</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎Spring-Netty/src/main/java/com/bruis/learnnetty/LearnnettyApplication.java‎

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package com.bruis.learnnetty;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class LearnnettyApplication {
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public static void main(String[] args) {
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SpringApplication.run(LearnnettyApplication.class, args);
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}
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}

‎Spring-Netty/src/main/java/com/bruis/learnnetty/bio/Client.java‎

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package com.bruis.learnnetty.bio;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.Socket;
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import java.util.Scanner;
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/**
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* @author LuoHaiYang
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*
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* 在bio的例子中，主要有server端和client端:
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*
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* 1. Server端开启一个线程通过serverSocket.accept()来监听有没有socket连接进来，之列称之为线程A。
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* 2. 然后在ClientHandler中又开启了一个线程，称为B，用于从socket中获取服务器端传过来的消息，线程B中通过while-true循环来获取。
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* 3. 在client客户端中，还有一个线程称为C，一直去循环获取服务端的数据。
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*
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* 在nio中，NioEventLoop源码中的run方法就对应着线程A的while-true方法以及线程c的while-true方法。而NioEventLoop的select方法就对应着serverSocket的accept操作。
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*
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*/
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public class Client {
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private static final String HOST = "127.0.0.1";
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private static final int PORT = 8000;
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private static final int SLEEP_TIME = 5000;
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public static final int MAX_DATA_LEN = 1024;
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public static void main(String[] args) throws IOException {
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final Socket socket = new Socket(HOST, PORT);
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System.out.println("客户端启动成功!");
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while (true) {
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try {
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Scanner scan = new Scanner(System.in);
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String clientMessage = scan.nextLine();
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System.out.println("客户端发送数据: " + clientMessage);
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socket.getOutputStream().write(clientMessage.getBytes());
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InputStream inputStream = socket.getInputStream();
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byte[] data = new byte[MAX_DATA_LEN];
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int len;
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while ((len = inputStream.read(data)) != -1) {
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String message = new String(data, 0, len);
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System.out.println("服务器传来消息: " + message);
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}
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} catch (Exception e) {
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System.out.println("写数据出错!");
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}
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}
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}
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private static void sleep() {
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try {
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Thread.sleep(SLEEP_TIME);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}

‎Spring-Netty/src/main/java/com/bruis/learnnetty/bio/ClientHandler.java‎

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package com.bruis.learnnetty.bio;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.Socket;
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/**
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* @author LuoHaiYang
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*/
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public class ClientHandler {
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public static final int MAX_DATA_LEN = 1024;
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private final Socket socket;
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public ClientHandler(Socket socket) {
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this.socket = socket;
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}
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public void start() {
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System.out.println("新客户端接入");
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new Thread(new Runnable() {
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@Override
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public void run() {
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doStart();
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}
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}).start();
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}
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private void doStart() {
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try {
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InputStream inputStream = socket.getInputStream();
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while (true) {
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byte[] data = new byte[MAX_DATA_LEN];
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int len;
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while ((len = inputStream.read(data)) != -1) {
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String message = new String(data, 0, len);
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System.out.println("客户端传来消息: " + message);
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//socket.getOutputStream().write(data);
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}
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}

‎Spring-Netty/src/main/java/com/bruis/learnnetty/bio/Server.java‎

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package com.bruis.learnnetty.bio;
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import java.io.IOException;
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import java.net.ServerSocket;
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import java.net.Socket;
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/**
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* @author LuoHaiYang
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*/
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public class Server {
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private ServerSocket serverSocket;
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public Server(int port) {
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try {
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this.serverSocket = new ServerSocket(port);
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System.out.println("服务端启动成功，端口:" + port);
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} catch (IOException exception) {
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System.out.println("服务端启动失败");
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}
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}
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public void start() {
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new Thread(new Runnable() {
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@Override
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public void run() {
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doStart();
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}
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}).start();
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}
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private void doStart() {
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while (true) {
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try {
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Socket client = serverSocket.accept();
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new ClientHandler(client).start();
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} catch (IOException e) {
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System.out.println("服务端异常");
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}
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}
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}
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}

‎Spring-Netty/src/main/java/com/bruis/learnnetty/bio/ServerBoot.java‎

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package com.bruis.learnnetty.bio;
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/**
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* @author LuoHaiYang
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*/
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public class ServerBoot {
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private static final int PORT = 8000;
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public static void main(String[] args) {
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Server server = new Server(PORT);
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server.start();
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}
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}

‎Spring-Netty/src/main/java/com/bruis/learnnetty/netty/demo01/Server.java‎

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package com.bruis.learnnetty.netty.demo01;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelInitializer;
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import io.netty.channel.ChannelOption;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.util.AttributeKey;
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/**
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* @author LuoHaiYang
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*/
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public class Server {
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public static void main(String[] args) throws Exception {
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// bossGroup对应着socket编程中的服务端的Thread，用于监听是否有client连接
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EventLoopGroup bossGroup = new NioEventLoopGroup(1);
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// workGroup对应着socket编程中的数据读取，读取server端读到的数据
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EventLoopGroup workGroup = new NioEventLoopGroup();
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try {
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ServerBootstrap bootstrap = new ServerBootstrap();
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bootstrap.group(bossGroup, workGroup)
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// 给服务端channel设置SocketChannel类型
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.channel(NioServerSocketChannel.class)
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// 给每个客户端连接设置TCP基本属性
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.childOption(ChannelOption.TCP_NODELAY, true)
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// 绑定属性
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.childAttr(AttributeKey.newInstance("childAttr"), "childAttrValue")
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// handler表示客户端的一个处理逻辑
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.handler(new ServerHandler())
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.childHandler(new ChannelInitializer<SocketChannel>() {
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@Override
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public void initChannel(SocketChannel channel) {
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//channel.pipeline().addLast(new AuthHandler());
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}
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});
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ChannelFuture channelFuture = bootstrap.bind(8888).sync();
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channelFuture.channel().closeFuture().sync();
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} finally {
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bossGroup.shutdownGracefully();
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workGroup.shutdownGracefully();
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}
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}
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}

‎Spring-Netty/src/main/java/com/bruis/learnnetty/netty/demo01/ServerHandler.java‎

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package com.bruis.learnnetty.netty.demo01;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import java.util.concurrent.TimeUnit;
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/**
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* @author LuoHaiYang
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*/
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public class ServerHandler extends ChannelInboundHandlerAdapter {
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@Override
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public void channelActive(ChannelHandlerContext ctx) {
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System.out.println("channelActive");
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}
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@Override
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public void channelRegistered(ChannelHandlerContext ctx) {
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System.out.println("channelRegistered");
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}
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@Override
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public void handlerAdded(ChannelHandlerContext ctx) {
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System.out.println("handlerAdded");
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}
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@Override
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public void channelRead(final ChannelHandlerContext ctx, Object msg) throws Exception {
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super.channelRead(ctx, msg);
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new Thread(new Runnable() {
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@Override
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public void run() {
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// 耗时的操作
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String result = loadFromDB();
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ctx.channel().writeAndFlush(result);
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ctx.executor().schedule(new Runnable() {
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@Override
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public void run() {
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// ...
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}
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}, 1, TimeUnit.SECONDS);
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}
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}).start();
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}
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private String loadFromDB() {
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return "hello world!";
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}
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}

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