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An introduction The topic of this section is to realize concurrency based on single thread, that is, to realize concurrency with only one main thread (obviously, there is only one available cpu). Therefore, we need to review the essence of concurrency first: switching + saving state. The cpu is running a task and will switch to execute oth ...

Create and start a Netty server How do I create and start a Netty server? Start a netty server and listen on port 8888 with the following code. public class MyNettyServer { private static Logger logger = LogManager.getLogger(MyNettyServer.class); public static void main(String[] args) throws InterruptedException { NioEven ...

UDP transport 1: Establish udp socket service 2: Receive data through receive method 3: Store the received data in the packet object 4: Analyze the received data through the function of packet object 5: Resources can be closed client /* Add feedback according to our normal thinking, but there is no response. Why The reas ...

1, Basic concepts of network programming 1. What is computer network Computers distributed in different regions are interconnected by communication lines through network devices such as hardware Computer network, can be very convenient for information transmission, resource sharing! 2. What is the IP address of the computer IP address is the ...

Network operation Network support in Java: InetAddress: used to represent hardware resources on the network, i.e. IP address;URL: uniform resource locator;Sockets: use TCP protocol to realize network communication;Datagram: use UDP protocol to realize network communication. InetAddress There is no public constructor. You can only create inst ...

OSI network seven layer model: (Open System Interconnection), translated as "Open System Interconnection" Physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer TCP/IP simplifies OSI, merges some layers, and finally retains only four layers, including interface layer, ...

Server communication process Server: 1,adopt socket()Function to create a to receive a connection request socket 2,To construct the host connection address sockaddr_in structural morphology,include sin_family,sin_port,sin_addr Three members 3,binding sockaddr_in Structure and socket 4,adopt listen()Function will stocket Set to listenin ...

Database connection description When it comes to TCP keepalive related settings, you can't avoid the topic of database connection. At present, in most use environments, database connections are long connections, that is, connections can be reused. Because the database connection is different from HTTP connection, HTTP is stateless, and the co ...

catalogue Network connectivity detectionCheck socket connectionNetwork usage detectionNetwork packet capturetransfer filesConnection idle timesummary Network connectivity detection In case of network abnormality in the application, the first thing to confirm is whether the network connectivity is normal. The following group of commands can ...

UDP communication principle: UDP protocol is an unreliable network protocol. It has a Socket object at both ends of the communication, but these two sockets are only the objects to send and receive data Both sides of communication based on UDP protocol have no so-called concept of client and server The datagram Socket class provided by Java i ...