Programmer Group

2021SC@SDUSC preface Starting with this blog, we will introduce several encoders and decoders that have been implemented in netty. In this blog, we will introduce netty's LineBasedFrameDecoder class, which divides messages into different parts based on line breaks. 1, LineBasedFrameDecoder package io.netty.handler.codec; import io.netty ...

Navigation 1,Multithreaded learning one 6. No lock of shared model In this chapter, we will implement concurrency control through non blocking optimistic locks 6.1 problem raising There are the following requirements to ensure the thread safety of the account.withdraw withdrawal method Test5.java public class Test5 { public static vo ...

Introduction: MongoDB is a very promising database, and MongoDB officially locates itself as a generic database, which is somewhat like MySQL. Although its popularity is far from the level of MySQL, there is one possible inappropriate comparison. Like MySQL N years ago, MongoDB will become stronger and more popular over time. Due to the comple ...

1, DemandThe file server uses HTTP protocol to provide external services. When accessing the file server through the browser, the user first checks the URL. If it fails, an error 403 is returned; If the current directory is opened by link through verification, each directory or file is displayed in the form of hyperlink, which can be accessed r ...

summary When communicating between our client and server, we must abide by certain protocols. These protocols may have been designed in advance, such as Http protocol, or we can customize them. Last We explained some codecs provided by Netty, so that we can design some protocols ourselves. This article mainly explains the Http protocol in Ne ...

1, BIO (Blocking IO) 1. Characteristics In the synchronous blocking model, a thread can only process one request 2. Shortcomings The read operation in IO code is a blocking operation. If the connection does not read and write data, it will cause thread blocking and waste resources If there are many threads, there will be too many server t ...

2021SC@SDUSC Let's analyze the details of outbound data propagation. Let's start with the write method of ChannelOutboundHandlerAdapter: public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception { ctx.write(msg, promise); } If you want to implement your own business processing logic, ...

Author: Grey Original address: Java IO learning note 8: multiplexing to Netty Multiplex multithreading The method is still a little troublesome. Netty helped us encapsulate it, greatly simplifying the coding complexity. Next, get familiar with the basic use of netty. Netty + implements a version of the code for communication between client a ...

This article mainly analyzes the core components in Netty in detail. Initiator Bootstrap and ServerBootstrap, as the intersection of Netty's client and server, are the first step in writing Netty's network program. It allows us to assemble the core components of Netty like building blocks. In the process of building Netty Server, we need to pay ...

2021SC@SDUSC preface In the initial use of the previous blog netty, we simply wrote the code between the client and the server to realize two-way communication. This time, we made some improvements on the basis of the last code and preliminarily realized the function of chat room. 1, Server 1,Server The Server class itself has not chang ...