bitbucket io

Use Socket. io to push messages in real time, and socket. io to push messages in real time. Project Background There is a social network module in a recently written project. You need to implement this function: when a user is liked, commented, or followed, the server needs to push a message to the user in real time. The final project address is https://github.com/noiron/socket-message-push. here we will in

This is a creation in Article, where the information may have evolved or changed. Interface Definition-BASIC interface //-----------------------------------------------------------------------------//============================== ===== Basic Interface ===================================//----------------------------------------------------------------- The------------//Reader interface is used to output its own byte data. There is only one duck method read. Parameter P: reads the data stream

;15//Determines whether a prime number is a public boolean isprime (i NT N) {(int i=2;iIf the stream is not buffered, the program reads a data and writes a data. This greatly affects the efficiency in a program with large data volumes. The buffer stream function is to write the data to the buffer, wait for the buffer full, and then write the data into the file. So the efficiency is greatly improved.Original address: http://www.cnblogs.com/liuling/archive/2013/05/07/InputStreamAndOutputS

1. bool exist = system. io. directory. exists (CFG. xmlproductpath + @ "\ mobile \"); // determines whether a folder exists 2. directory. createdirectory (CFG. xmlproductpath + @ "\ mobile \"); // create a mobile folder 3. string [] dirs = NULL; dirs = directory. getfiles (CFG. xmlproductpath + @ "\ mobile \"); // return the file name in the mobile folder 4. fileinfo = new fileinfo (dirs [I]); // obtain file information (including path packaging)

I. Io and stream Data input and output (I/O for input/output)The input and output of standard input devices and standard output devices are referred to as standard I/OThe input and output of files stored on an external disk are referred to as files I/O.The input and output of the specified string bucket in the memory are referred to as string I/O. The process of data input and output can be visually viewed as a stream.The operation for retrieving dat

"); In fact, you can not refresh ps.close (); } Character Print stream: public class Printwriterdemo {public static void Main (string[] args) throws Exception { PrintWriter PS = new Prin Twriter (New File ("File/out.txt")); Ps.write ("ABC"); Ps.print (false); Ps.println (); Ps.print ("Layne"); In fact, you can not refresh ps.close (); } Formatted output in the print stream (printf method): System.out.println (); actually equivalent to printstream PS = Syst

Then draw on the theory in the UNIX Network programming Volume:The 2 main objects involved in IO operations are program processes, system cores. As an example of a read operation, when an IO read occurs, it typically goes through two steps:1, waiting for data preparation2. Copy data from the system kernel to the operation processFor example, in a read operation on the socket, step 1 waits for the network pa

, directly submit the command + user buffer to the kernel driver, and then return immediately. At this time, the user thread can continue to run and do other things. When you want to know the command completion status, you can use getqueuedcompletionstatus to obtain the completed request and data. Therefore, you can submit a large number of IO requests first, and then process and return them slowly. The reason why iocp is more efficient than epoll is

Basic Application of socket. io tutorial (2) socket. io tutorial Preface Socket. IO supports timely, bidirectional, and event-based communication. It can work on every platform, every browser, and every device, with the same reliability and speed. Real-time analysis: pushes data to clients, which are expressed as real-time counters, charts, or log customers.

Objective: In general operations work often encounter such a scenario, the server's IO load is very high (util in iostat), but unable to quickly locate the IO load source process and source files resulting in the inability to make the appropriate policy to solve the problem. This phenomenon is more common on MySQL, and before 5.6 (Performance_schema provides IO