Programmer Think

Now, the microservice projects developed use more distributed locks, so some records are made for the self-determined implementation of distributed locks.*In the actual project, you can use the RLock lock of the Redisson framework directly. Create a springboot redis project     springboot-redis-demo Add dependency package <dependency> ...

1.pull image in Chinese: docker pull beginor/gitlab-ce:11.3.0-ce.0 2. Create directory: Generally, GitLab's configuration (etc), log (log) and data (data) are placed outside the container for later upgrade, so please prepare these three directories first. mkdir -p /usr/local/gitlab/etc mkdir -p /usr/local/gitlab/log mkdir -p ...

The use of predicate chain in java 8 brief introduction Predicate is a functional interface, which represents a method that needs to enter a parameter and return the boolean type. Usually used in stream filter to indicate whether the filter conditions are met. boolean test(T t); Basic use Let's first look at how to use Predicate in stream ...

During the work period, the customer specifies to use this. During the actual work time, the other party has no demo, has an md5 signature that is also 1.0, and can't find the case through online search. The official website doesn't provide any related content of the document. Everything should be written according to the document provided by t ...

1, Write in front As a test, sometimes it is often necessary to record their own operation on the screen, so as to facilitate the follow-up development and positioning of students. In the past, screen to GIF was used to record the screen and make dynamic pictures. Occasionally, python can also be realized. Then hurry to learn. 2, Effect display ...

Author: Tang Youhua https://dzone.com/articles/a-birds-eye-view-on-java-concurrency-frameworks-1 1. Why to write this article When NoSQL became popular a few years ago, like other teams, our team was keen on exciting new things and planned to replace an application's database. However, when we go deep into details, we think of what a wise man ...

1, Use of enumeration classes 1. Description of enumeration class: Understanding of enumeration class: there are only a limited number of objects in the class, which are certain. We call this class an enumeration class Enumeration classes are strongly recommended when you need to define a set of constants Implementation of enumerat ...

order This paper focuses on my SQL connection of canal ErosaConnection canal-1.1.4/parse/src/main/java/com/alibaba/otter/canal/parse/inbound/ErosaConnection.java public interface ErosaConnection { public void connect() throws IOException; public void reconnect() throws IOException; public void disconnect() throws IOException; ...

Solve the problem of cross domain access of spring MVC web project 1. Cross origin cross domain annotation springboot has its own cross domain annotation, which can be placed on the RestController's class or method. It can also customize those domain names, which can be cross domain and very flexible @CrossOrigin / / by default @ CrossOrigin a ...

How do I sign parameters in JMeter? Last Period JMeter Parameter Signature - Groovy Script Form Using Groovy scripting, this issue continues Groovy's use of parameter signatures in JMeter -- parameter signatures are done using Groovy tool classes. This is a common situation in interface testing where one parameter of the interface is determined ...