Programmer Think

Catalog Why do I need thread pools? demand Thread pool design 1. Number of threads 2,keepAliveTime 3. The task queuing policy is linkedblockingqueue 4. Reject policy Source code analysis Result analysis attach Why do I need thread pools? In daily development, we are prone to the followin ...

1. Blocking and non blocking Traditional IO flows are blocking. That is, when a thread calls read() or write(), the thread is blocked until some data is read or written, and the thread cannot perform other tasks during this period. Therefore, when the network communication is completed for IO operat ...

Four modules of urlib urrlib.request urrlib.error urrlib.parse urrlib.robotparser Get page source code import urllib.request response=urllib.request.urlopen("http://www.baidu.com") print(response.read().decode('utf-8')) #Get Baidu's source code post request import urllib.parse import urllib.reque ...

Windows provides a thread pool mechanism matching the completion port. 1. Call function / work item asynchronously 2. Call a function every other time / / timing item 3. Call a function when the kernel object is triggered / / wait item 4. Call a function / / I/O item when the asynchronous I/O reques ...

Alibaba cloud OSS and SMS tools Import dependency <dependency> <groupId>cn.gjing</groupId> <artifactId>tools-aliyun</artifactId> <version>1.0.0</version> </dependency> I. OSS 1, configuration The following configurations are required except for the last four aliyun: # User key, obtai ...

Catalog Summary RMI Framework register MethodFactory MethodDefinition ProxyAnntotation Server RPCServer ServerExecutor ArgumentMaker configuration file Client ClientProxy ClientDialog RPCClient Load Balancing Interface summary Summary RPC (Remote Procedure Call Protocol) A remote proced ...

There is a log library for developers to use in boost, but the efficiency is not the highest: Add the header file "include < boost / log / trial. HPP > to import the log Library The log Library in boost has the following six levels: BOOST_LOG_TRIVIAL(trace) << "A trace severity message" ...

clone protected Object clone() Creates and returns a copy of this object. protected Object clone() throws CloneNotSupportedException All classes inherit Object, so all classes have clone() methods. But not all classes want to be cloned. They must support the clonable interface. This interface does ...

How the chat program works: 1. Client connects to server 2. The server establishes a connection and adds users to the guest list 3. Another user connects to the server 4. User a sends the information to user b through the server, and at the same time receives the reply from user b [location server] use Socket or ip addres ...

1. Build MySQL master-slave database Refer to another blog post of the authorhttps://blog.csdn.net/weixin_37838921/article/details/104033403 2.MySQL dual machine environment role IP OS/MySQL version master1 192.168.11.10 CentOS7 / MySQL5.7 master2 192.168.11.30 CentOS7 / MySQL5.7 3. MyS ...