Netty权威指南读书笔记精要

版权申诉
0 下载量 95 浏览量 更新于2024-10-01 收藏 151KB ZIP 举报
资源摘要信息:"netty 权威指南读书笔记" Netty是一个高性能的网络应用框架,它被广泛用于构建可维护、高响应、高吞吐量的网络服务。它是在JDK的原生Socket API之上构建的异步事件驱动的网络应用框架,允许快速开发可维护的高性能协议服务器和客户端。 Netty的核心组件包括:Bootstrap、Channel、ChannelHandler、ChannelPipeline、ChannelFuture。Bootstrap用于启动和引导一个Netty应用,Channel代表一个网络连接,ChannelHandler是实际处理网络读写事件的组件,ChannelPipeline负责管理ChannelHandler的生命周期,ChannelFuture提供了一种优雅的处理异步操作结果的方式。 Netty的主要特性包括:异步和事件驱动模型、零拷贝、可扩展性、高可靠性、安全性。异步和事件驱动模型是Netty的核心特性,它允许开发者快速、高效地构建高性能的网络应用。零拷贝特性减少了不必要的数据拷贝,提高了网络通信的效率。Netty的可扩展性和高可靠性使得开发者可以根据实际需求灵活地扩展和维护系统。安全性方面,Netty提供了多种安全特性,例如SSL/TLS支持。 Netty的使用场景非常广泛,包括即时通讯服务、游戏服务器、数据收集、分布式服务框架等。在这些场景中,Netty通常用于实现高性能的网络协议,处理大量的并发连接。 在实际开发过程中,使用Netty构建网络应用需要对网络编程有深入的理解,同时需要熟悉Netty的各种组件和特性。开发者需要根据实际需求,合理设计ChannelHandler,编写高效、可维护的业务逻辑代码。 在学习Netty的过程中,推荐使用权威指南这类书籍进行系统学习。这类书籍通常由Netty的开发者或者资深开发者编写,能够提供深入浅出的讲解,帮助开发者快速掌握Netty的使用方法和技巧。 总的来说,Netty是一个强大的网络编程框架,无论是在学习还是在实际开发中,都值得开发者投入时间去深入研究和掌握。通过阅读权威指南等专业书籍,并结合实际案例进行实践,开发者可以更好地理解和运用Netty,从而构建出高效、稳定、可扩展的网络应用。

2023-07-14 15:19:01.215 WARN 7308 --- [sson-netty-2-15] io.netty.util.concurrent.DefaultPromise : An exception was thrown by org.redisson.misc.RedissonPromise$$Lambda$888/0x00000008008f7440.operationComplete() java.lang.NullPointerException: null 2023-07-14 15:19:01.216 ERROR 7308 --- [sson-netty-2-15] o.r.c.SentinelConnectionManager : Can't execute SENTINEL commands on /172.24.107.11:26379 org.redisson.client.RedisException: ERR No such master with that name. channel: [id: 0x2d66827d, L:/172.23.9.103:46812 - R:/172.24.107.11:26379] command: (SENTINEL SLAVES), params: [mymaster] at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:365) ~[redisson-3.13.3.jar:3.13.3] at org.redisson.client.handler.CommandDecoder.decodeCommand(CommandDecoder.java:196) ~[redisson-3.13.3.jar:3.13.3] at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:134) ~[redisson-3.13.3.jar:3.13.3] at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:104) ~[redisson-3.13.3.jar:3.13.3] at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:501) ~[netty-codec-4.1.51.Final.jar:4.1.51.Final] at io.netty.handler.codec.ReplayingDecoder.callDecode(ReplayingDecoder.java:366) ~[netty-codec-4.1.51.Final.jar:4.1.51.Final] at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) ~[netty-codec-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.51.Final.jar:4.1.51.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.51.Final.jar:4.1.51.Final] at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.51.Final.jar:4.1.51.Final] at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.51.Final.jar:4.1.51.Final] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] 解决方法

2023-07-15 上传

com.fmall58.wechatsub.business.bizs.UException at com.fmall58.wechatsub.business.service.PubService.isBindWeChatSub(PubService.java:76) at com.fmall58.wechatsub.business.bizs.PubHelper.isBindWeChatSub(PubHelper.java:125) at com.fmall58.wechatsub.business.bizs.PubHelper.execute(PubHelper.java:38) at com.fmall58.wechatsub.server.handlers.ServerHandler.channelRead(ServerHandler.java:103) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:656) at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:591) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:508) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:470) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:909) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)

2023-06-11 上传