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and changing will we need business. For example, one of the following methods of inserting data adds a transaction:
@Override
@Transactional (propagation = Propagation.required,isolation = isolation.default,timeout=36000, Rollbackfor=exception.class) Public
Integer Add (Cbf_jtcy t) {return
Cbf_jtcymapper.insert (t);
}
If you do not know what is inside, you can view this article, Spring,mybatis Transaction ma
Glide is a fast and efficient Open-source multimedia resource Management library on the Android platform that provides compression of multimedia files, memory and disk caching, and resource pool interfaces.Glide support acquisition, decompression display video, images and GIFs, Glide has a flexible API allows developers to customize the network stack technology, the default use of HttpURLConnection, you can be replaced by Google's volley or okhttp
Gl
Big Data breeds NoSQL databases. Besides MongoDB, Redis is a frequent visitor to various systems. As an example of penetration, we obviously need to popularize this knowledge. At the very least, we know how to view the information in the redis database when we know that the other party uses the redis database.
First, we will install a redis instance to let it run.
I. Installation
wget http://download.redis.io/releases/redis-2.8.7.tar.gztar zxvf redis-
different brands, different series of network management switches, this article teaches you only general configuration methods, with these common configuration methods, we can extrapolate, mastery. typically network-managed switches can be configured in two ways: local configuration and Remote networking
Yarn memory allocation management mechanism and related parameter configuration, yarn Mechanism
Understanding the memory management and allocation mechanism of Yarn is particularly important for us to build and deploy clusters, develop and maintain applications, and I have done some research for your reference.I. Related configurations
Yarn memory allocation and
computers and operating systems can send print jobs over the Internet to printers that connect directly to the Windows 2000 print server, or to printers that connect to a network or other server using internal or external network adapters. § Print settings for administrators, Windows 2000 provides an improved universal network configuration tool. For example, the new standard port, described later in thi
configured, you must start the FTP server to use it. there are two startup methods: 1. start the instance in graphical mode and select "application", "system settings", "Server Settings", and "service. you can see vsftpd. Check it and start it. 2. start in the terminal window with commands.
You can also use the service command.
2. FTP-related configuration files
/Etc/vsftpd. conf,
/Etc/vsftpd. ftpusers,
/Etc/vsftpd. user_list When configurin
Linux basic configuration and management 2 ---- Linux multi-command collaboration ---- pipelines and redirection Linux basic configuration and management 1 ---- Linux network basic configuration http://www.2cto.com/os/201309/240457.html 1. pipelines and redirection 1. in Lin
It is easy to build a software, but it is difficult to do it. It is not easy to persevere. This is my philosophy of comforting myself.We should not take the lead in making e-waste. One is my goal. Let's first look at the effect of a background permission configuration management interface.I will not be arrogant about which region has any functions.
Permission range:For
The same project can sometimes involve multiple databases, or multiple data sources. Multiple data sources can be divided into two situations:1) Two or more databases are not relevant, independent of each other, in fact, this can be developed as two projects. For example, in the game development of a database is a platform database, and other platforms under the game corresponding database;2) Two or more databases are master-slave relationships, such
second transaction modifies the data in the table by inserting a new row of data into the table. Then the user who will be working on the first transaction in the future finds that there are no modified rows of data in the table, as if the illusion had occurred.Non-repeatable reading differs from illusion reading: Illusory reading is somewhat similar to non-repeatable reading, but the data that cannot be read repeatedly is inconsistent because the data set he is trying to fetch is changed. But
Nginxhttps encryption and nginx log configuration and management use the advantages of Nginx as a WEB server, Nginx is highly efficient in processing static files, index files, and automatic indexing. As a proxy server, Nginx can implement non-cache reverse proxy to improve website performance. Nginx https encryption and Nginx log configuration and
: Performing code analysis in command line formIn this article, SonarQube Scanner and SonarQube Scanner for MSBuild are described in two ways, SonarQube Scanner for Jenkins will be speaking in the next article about Jenkins, Other ways need everyone to try.5. SummarySonarqube is an open source code quality management platform that supports analysis of projects written in a variety of development languages through plug-ins, and in this article describe
Environment
MongoDB 3.4WINDOW7 MongoDB Common Commands
[Root@snails ~]# ps-ef|grep mongod
[root@snails ~]# MONGO--host=127.0.0.1--port=27017
MongoDB Shell Version:3 .2.7
connecting To:127.0.0.1:27017/test
> Show dbs #显示数据库列表
> Show Collections # Displays a collection in the current database (similar to a table in a relational database)
> Show Users #显示用户
> Use
MongoDB does not have a command to create a database, but there are similar commands. For e
The configuration mode of the switch can be broadly divided into two categories: one is the configuration mode represented by the Cisco switch, and the other is the configuration mode represented by Huawei and the H3C switch. In fact, the two configuration modes are not fundamentally different, but the
how to integrate a suite of configuration management systems based on CVS
Previously in the project team for configuration management work, their own research and learning some of the supporting tools based on CVS, are recommended to everyone. These tools are essentially free and perfectly integrated to achieve version
Simple Management of haproxy configuration files,
Version: python3Function: simple query, add, and delete haproxy configuration files.Procedure:1. Select the appropriate options as prompted2. After Entering the selected option, write the corresponding parameters as prompted.3. the query function returns the query result. The add, delete, and rollback functions ar
version 3 on the production system, and this version is untested.
The result was unbelievable:
is the untested version running on the production system ?!
Any software system, all its code should be delivered as a whole, rather than just part of the code (change-related code) as in the example above, which is the root cause of the quality trap. There is an inherent flaw in a seemingly reasonable process.
3 Improvement Suggestions
To avoid the qu
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