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Original address 1. When the system boot program starts the Linux kernel, the kernel will record various data structures and drivers. After loading, the Android system starts and loads the first user level process: Init.c(system\core\init) //main() method in Init.c int main(int argc, char **argv) { //Parsing execution ini ...

1. mysql user management In daily use, it is necessary to limit the permissions of personnel, so it is necessary to manage users. ##Create users and authorize Specify login IP [root@host ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. mysql> grant all on *.* to 'user1'@'127.0.0.1' identified by '123456'; #Create user1 us ...

1. [Role]To maintain the sustainability and stability of the connection, the websocket heartbeat is the solution.2. [Analysis]1. If the device network is disconnected, the native websocket will not immediately trigger any events on the websocket, and the front end will not know if the current connection has been disconnected.2. When we use the ...

Since the data store uses a MongoDB cluster, the address is the address of Mongos when accessed externally, and no problems were found during use. The configuration is as follows: <mongo:mongo host="${mongodb.hostname}" port="${mongodb.port}"> <mongo:options connections-per-host="${mongodb.port}" threads-allowed-t ...

1. NIO completes network programming 1.1 Selector boss Selector Selector, network programming using NIO's big brother!!! The server can execute a thread, run the Selector program, and listen. New connection, connected, read data, write data Common methods of Selector: public static Selector Ope ...

Original address: http://www.work100.net/training/java-polymorphism.htmlMore Tutorials: Beam Cloud - Free Course polymorphic Sequence Number Intratext chapters video 1 Summary - 2 virtual function - 3 Implementation of polymorphism - See the navigation section above for reading 1. Overview Polymorphism is the ability of the same be ...

At present, k8s mainly supports two kinds of resources: CPU and memory. In order to support the scheduling and allocation of other types of hardware resources that users need to allocate on demand, k8s implements the device plugin framework for resource integration of other types of hardware. For example, now machine learning uses GPU and othe ...

Spring boot project integrates websocket to realize connectivity brief introduction pom.xml introduces dependency Create websocket configuration file for spring boot project websocketServer core code An entity class not understood, annotated to be solved js of front-end page, creating websocket for ...

There is a heartbeat detection mechanism in Netty. When the client does not read or write for a certain period of time, the server can detect it and prompt IdleStateHandler is the processor that netty processes idle state The specific implementation steps are as follows: 1. Reader idletime: indicate ...

1. Preface What is the difference between websocket and socket.io? websocket A technology for two-way real-time communication between client and server While mainstream browsers already support it, there may be incompatibilities when using it Suitable for client and node-based server use socket.io Encapsulate WebSocket, AJAX, and other comm ...