Programming VIP

order This paper mainly studies the HAClient of rocketmq HAClient rocketmq-all-4.6.0-source-release/store/src/main/java/org/apache/rocketmq/store/ha/HAService.java class HAClient extends ServiceThread { private static final int READ_MAX_BUFFER_SIZE = 1024 * 1024 * 4; private final AtomicReference<String> masterAddress ...

1. New features of SYSTEMd Process (start) all services in parallel. Service control logic based on dependency definition System state snapshot Activate the process on demand, only when it is accessed for the first time can it really start; 2. Common unit types of SYSTEMd target: simulate the implementation level; service: define system service ...

(This article is based on Boost 1.69)Boost.Asio code style.Asio divides the declaration and implementation of some of the more complex classes into two header files for readability, and include s the header file of the implementation at the end of the header file of the declaration.The impl folder contains header files for these implementations ...

1. Message processing center class:    this class is the basic class for processing message logic. If the message received from MQ client is CONSUME, it is consumption message; if the message received from MQ client is not CONSUME, it is production message. package com.richinfo.demo; /** * Message processing center cl ...

tcp protocol and socket in network programming I. single supplement Several ways to realize single column #Mode 1: classmethod # class Singleton: # # __instance = None # # @classmethod # def singleton(cls): # # if not cls.__instance: # cls.__instance = cls() # # return cls.__instance # # obj1 = Singlet ...

The starting process of nginx starts with the main() method of the nginx.c file, in which nginx performs operations such as parsing command line parameters, initializing module indexes, parsing configuration files, initializing modules, starting master, worker, and cache-related processes.This paper starts with the main () method and explains h ...

Applet does not have message pushing function, to achieve this, you can use php's websocket Configure the server. 1. Upload the web-msg-sender directory to the server (download address https://www.workerman.net/web-sender) 2. Modify the start_io.php file to modify the certificate path (nginx certificate) $sender_io = new SocketIO(2120); Mod ...

Create a new socket int listenfd; listenfd = Socket(AF_INET,SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC,0); Bind the ip and port for the socket sockaddr_in serv_addr; bzero(&serv_addr,sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_port = htons(SERV_PORT); serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); Bin ...

I can't understand a lot of WebSockets on the Internet. I have to watch a video to understand them Video link: https://blog.csdn.net/QQ408896436/article/details/81606553 The following are all based on the steps of the teacher First open cmd or powershell, type cd to enter the server address, and then type NPM install nodejs websocket And no ...

Simple understanding of Socket Socket is a connection oriented communication protocol. Socket application is a C/S (Client / Server) structured application Socket is the end point of communication between two machines. Socket is a two-way communication endpoint connecting two programs running on the network. Socket communication principle T ...