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stay RocketMQ repeated consumption problem | the introduction of idempotent mechanism into the core process of order system In this paper, we discuss the problem of repeated message consumption. A better solution is to use business judgment on the consumption side to ensure the idempotence of the interface, so as to avoid the problem of repeate ...

Android studio novice development: weather app (Baidu map api + wind weather api + city query + broken line display) 1. Content introduction 2. Environment configuration 3. Import another demo 4. AS project analysis 5. Weather project flow 6. Data exploration 7. Module architecture 8,sharedpreference 9. C ...

1 multi meter 1.1 multi table description In actual development, a project usually needs many tables to complete For example, the database of a shopping mall project needs many tables: user table, classification table, commodity table, order table 1.2 disadvantages of single table 1.2.1 table building C ...

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catalog 1. HD reproduction 1. Re understanding of Express 2. The problem of angular scope and automatic synchronization 3. A way to write html page 2. Realization of online test function 3. Hotspot broadcast Site folder send Raspberry pie installation database Mobile terminal test 4. Summary ...

Parsing environment elements to complete multi environment configuration in Mybatis After finishing the tedious process of configuring the Configuration object based on settings, it's time to parse the environments tab and configure the Mybatis multi environment. Mybatis supports multi Environment configuration by default. There is an Environme ...

Original link: https://blog.csdn.net/wangshubo1989/article/details/75050024/ Life goes on, go go go!!! Previously, I introduced how to use sqlite3 in golang: <Go practice - go language operates sqlite database (The way to go)> Today I want to share with you how to use redis database in golang. ##What is redis Official website:https:/ ...

Distributed transaction solution -- Seata -- Implementation Seata Background Seata version selection Seata practice 1. Problem description 2. Problem location 3. Solutions Seata Seata is an open source distributed transaction solution, which is committed to providing high-performance and easy-to- ...

sqlzoo more join -- Movie Database 1. List the first film of 1962, [display id, title] SELECT id,title FROM movie WHERE yr=1962 2. The first movie year of the movie "Citizen Kane". select yr from movie where title= 'Citizen Kane' 3. List all the Star Trek series movies, including id, ...

The temporary tablespace of PostgreSQL, through the parameter temp_tablespaces are configured. PostgreSQL allows users to configure multiple temporary tablespaces. When configuring multiple temporary tablespaces, use commas to separate them. If temp is not configured_ Tablespaces parameter. The temporary tablespace corresponds to the default ...