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Openfire + spark + smack Instant Messaging (1) --- Openfire installation and configuration, openfiresmackOpenfire is an instant messaging server, also known as the instant messaging platform. It is based on the XMPP protocol and is familiar with communication software QQ, MSN and Gtalk. Gtalk is based on the implementa

The use of OpenFire as a server, so no need to write a server, will save a lot of things, openfire after a simple configuration can realize a communication server basic functions, OpenFire With Java development, open source real-time collaboration (RTC) servers are based on the XMPP (Jabber) protocol. Xmpp An xml-based protocol that inherits the flexibility of development in an XML environment. Therefore, the application based on XMPP has super scalability. Extended XMPP can address the need

basically use any shell script to archive transaction logs. Here are some ideas: • Use some simple replication to transfer data to an NFS share • Run rsync to move files • Use custom scripts to validate the Xlog file and move it to an FTP server • Copy XLOG files to tape The choice of possible management Xlog is limited by imagination. Restore_command accurately corresponds to Archive_command. Its role is to get the data from the archive and provide it to the instance, which is to replay it (in

Java instant online chat (1) Today, I imitated the video of Jack Ma's instructor and made an instant online chat. At this time, I will share it with you. It is not very good. Please join us. import java.awt.Frame;public class ChatClient extends Frame {/** * @param args */public static void main(String[] args) {new ChatClient().lanchFrame();}public void lanchFra

Install Oracle Instant client locally, download, extract, configure environment variables, execute sqlplus, and the error is as follows: [Root@abc ~]# SqlplusSqlplus:error while loading shared libraries:libaio.so.1:cannot open Shared object file:no such file or directory[Root@abc ~]# which sqlplus/usr/local/instantclient_11_2/sqlplus[Root@abc ~]# Ldd/usr/local/instantclient_11_2/sqlplusLinux-vdso.so.

Python basic tutorial notes-Project 1-instant tag-Day1 Objective: to convert the Upload File (.txt into a web page (.html) Test document test_input.txt: Welcome to World Wide Spam, Inc.These are the corporate web pages of *World Wide Spam*, Inc. We hopeyou find your stay enjoyable, and that you will sample many of ourproducts.A short history of the companyWorld Wide Spam was started in the summer of 2000.

Today we mainly look at the sub functions of the Re.sub function and the handler class.First look at the Re.sub functionRe.sub a total of 5 parameters, but generally write the first three is good, that is, PATTERN,REPL and stringPattern represents a modal string in a regular, repl can be a string, or it can be a function. String to be substituted forLook at the code first:Import Redef num2a (Match): Return ' a ' a = Re.sub (R ' (\d+) ', num2a, ' he123he ') print AA = Re.sub (R ' (\d+) ', R ' a '

bb () b = Geta TTR (A, ' Nofunc ', None) print BThe result of the execution is:The first time you use the GetAttr function, B tries to get the Print_hello function in a, and from the printout we can see that we have called B after the success.When using the GetAttr function for the second time, B attempts to get the Nofunc function in a, which shows that there is no function named Nonefunc in a, so the value of B is NoneThen look at the callable function.Look at the pictureIt is clear that if t

is judged to be false, enter Elif, '. The value returned after join (block) is ' How is you\nhow do youdo\n ', execute strip () Back to ' How is you\nhow do ' ( note here thatstrip () only removes white space characters from the end of the string and does not delete the middle of the string ):In conclusion,Test_input = [' hello\n ', ' \ n ', ' How-areyou\n ', ' How does you do\n ', ' \ n ', ' fine '] after the generator blocks, the resulting result should be:[' Hello ', how is you\nhow do ', '

IDC Commentary Network (idcps.com) September 06: According to the latest data released by Dailychanges, on September 1, 2015, the global domain name resolution new 20 list, the chain of August 25 has changed. Among them, the shortlisted Chinese domain name quotient from 6 to 4, respectively is the Chinese million net, the Dnspod, the new network and the easy name

Idea: Modify the browser startup parameters from the command line so that the browser does not cross-domain checks, allowing cross-domainMethod: Command line arguments to start the browser after adding parameters--disable-web-securityCases:Chrome--disable-web-securityThe role of the--disabl-web-security parameter is to disallow cross-domain checking by the browserHowever, there are three drawbacks to this a

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ArticleDirectory 1. Basic concepts of application domains 2. Basic operations on application domains 3. Create an object in the default application domain 4. Create an object in the new application domain 5. Proxy and sending) 6. Example of sending and referencing messages 7. Customer application (d