Netty 4.1.22 Jar 下载
NettyServer
抽象成公共的服务类、子服务类只需继承、并传入端口和处理类
/**
* NettyServer 启动服务
*
* @author MENG
* @version 2018/3/20
* @see
*/
public abstract class NettyServer
{
Logger logger = LoggerFactory.getLogger(NettyServer.class);
/**
* 端口
*/
private int port;
/**
* 通道初始化类
*/
private ChannelInitializer channelInitializer;
public NettyServer(int port,ChannelInitializer channelInitializer)
{
this.port = port;
this.channelInitializer = channelInitializer;
}
/**
* 启动服务
*
*/
public void start()
{
/**
* NioEventLoopGroup 是用来处理I/O操作的多线程事件循环器
*
* 第一个经常被叫做‘boss’，用来接收进来的连接
*
* 第二个经常被叫做‘worker’，用来处理已经被接收的连接
*
* 一旦‘boss’接收到连接，就会把连接信息注册到‘worker’上
*
* worker的EventLoopGroup默认的线程数是CPU核数的二倍。
*
* NettyRuntime.availableProcessors() * 2 = Runtime.getRuntime().availableProcessors() * 2
*/
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try
{
/**
* ServerBootstrap 是一个启动NIO服务的辅助启动类 你可以在这个服务中直接使用Channel
*
*/
ServerBootstrap serverBootstrap = new ServerBootstrap();
/**
* 这一步是必须的，如果没有设置group将会报java.lang.IllegalStateException: group not set异常
*
*/
serverBootstrap = serverBootstrap.group(bossGroup, workerGroup);
/***
* ServerSocketChannel以NIO的selector为基础进行实现的，用来接收新的连接这里告诉Channel如何获取新的连接.
*
*/
serverBootstrap = serverBootstrap.channel(NioServerSocketChannel.class);
/**
* option是设置 bossGroup
*
* childOption是设置workerGroup
*
* 使用对象池，重用缓冲区
*/
serverBootstrap = serverBootstrap.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
serverBootstrap = serverBootstrap.childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
/**
* 设置 通道 处理类
*
*/
serverBootstrap = serverBootstrap.childHandler(channelInitializer);
ChannelFuture f = serverBootstrap.bind(port).sync();
logger.info("Start netty server-port : {} ...",port);
//等待服务器监听端口关闭
f.channel().closeFuture().sync();
}
catch (InterruptedException e)
{
logger.error("Netty 绑定端口错误",e);
}
finally
{
// Shut down all event loops to terminate all threads.
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
}
PaintOfSaleServer
NettyServer 子类
/**
* POS 服务端 echo:有响应的服务
*
* @author MENG
* @version 2018/3/19
* @see
*/
@PublishNettyServer
public class PointOfSaleServer extends NettyServer
{
public PointOfSaleServer() throws IOException
{
//传入 端口 和 通道
super(Integer.parseInt(Utils.getNettyPropsValByKey("pos.server.port")), new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception
{
// 属于ChannelOutboundHandler，逆序执行
ch.pipeline().addLast(new PointOfSaleEncoder());
// 属于ChannelInboundHandler，按照顺序执行
ch.pipeline().addLast(new PointOfSaleDecoder());
ch.pipeline().addLast(new PointOfSaleHandler());
}
});
}
}
@PublishNettyServer
自定义注解用于发布Netty服务
/**
* 发布netty Server对象注解
*
* @author MENG
* @version 2018/03/20
* @see
*/
@Target({ ElementType.TYPE})//接口、类、枚举、注解
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface PublishNettyServer
{
String description() default "";
}
Spring boot 2.0 整合 Redis 配置
/**
* redis 配置类
*
* @EnableRedisHttpSession 开启spring session支持
*
* 过期时间：maxInactiveIntervalInSeconds 秒
*
* @author MENG
* @version 2017/12/24
* @see
*/
@Configuration
public class RedisConfig extends CachingConfigurerSupport
{
/**
*
* spring提供两个类操作Redis RedisTemplate(操作对象) StringRedisTemplate(操作String)
*
* @param factory
* @return
*/
@Bean
public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory)
{
StringRedisTemplate template = new StringRedisTemplate(factory);
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
template.setValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}
application.properties
# REDIS (RedisProperties)--------------------------------------------------------------------------
# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器连接端口
spring.redis.port=6379
## 单个redis服务配置
spring.redis.host=47.104.22.231
#spring.redis.cluster.nodes=47.104.22.231:6379,47.104.22.231:6380,47.104.22.231:6381,47.104.22.231:6382,47.104.22.231:6383,47.104.22.231:6384
# Redis服务器连接密码（默认为空）
spring.redis.password=mlgd
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.jedis.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.jedis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.jedis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.jedis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=6000
# REDIS (RedisProperties)----------------------------------------------------
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