实战教程:NIO到Netty的905.4协议服务器开发

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本资源是一份针对具有一定Java开发基础的学习者编写的实战教程,重点围绕JT/T905.4-2014交通数据交换协议和NIO、Netty技术进行讲解。教程分为七个章节: 1. 开篇寄语:首先,作者子涵,通信工程背景,有着丰富的互联网行业经验,强调通过项目实战学习编程的重要性,认为掌握Socket编程、多线程、并发处理、NIO等技术对于提升IT人员的技术深度至关重要。 2. Socket编程基础:第2章介绍了Socket编程的基础概念,包括Socket家族的基石、byte数组和缓冲区的基础知识,以及NIOSocket通讯的工作原理,为理解905.4协议的实现打下基础。 3. 905.4协议解读:第3章详细解读了905.4-2014协议,涉及基于通道选择器的长连接框架、消息读写机制,以及各个角色如认证、ping、位置报告和业务报告等工作原理。同时,还有数据校验和加密的相关内容。 4. 测试方法:第4章包含测试策略,如数据样例、客户端链接保持功能实现、短连接测试和NIO服务端性能分析,确保协议实现的正确性和效率。 5. 从NIO到Netty:第5章由NIO过渡到更高级的Netty框架,讲解了Netty的核心基础、常见问题及应用,以及如何用Netty重写服务器端,涉及链路管理和内存管理等内容。 6. 统计与监控:第6章介绍了监控工具Grafana的使用,以帮助开发者更好地理解和优化系统性能。 7. 售后服务:最后,提供勘误历史和文档构建工具的信息,以及作者对于付费价值的解释,强调实战学习的价值和专业支持。 这份教程不仅适合希望通过实战提升Java开发技能的学生,也适用于希望深入理解Socket编程和高性能网络编程的专业人士。通过学习,读者不仅能掌握905.4协议的实战应用,还能体验到从底层编程到高效框架的进阶过程。
2023-06-12 上传

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

2023-07-13 09:15:56,872 WARN org.apache.flink.runtime.dispatcher.DispatcherRestEndpoint [] - Unhandled exception java.io.IOException: Connection reset by peer at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.8.0_372] at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:1.8.0_372] at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.8.0_372] at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.8.0_372] at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379) ~[?:1.8.0_372] at org.apache.flink.shaded.netty4.io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253) ~[flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132) ~[flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350) ~[flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [flink-dist-1.15.3.jar:1.15.3] at java.lang.Thread.run(Thread.java:750) [?:1.8.0_372]

2023-07-14 上传