Programmer Think

An InterruptException occurred when the RocketMQConsumer service was shut down Background summary The main problem is the version upgrade Old version core rocketmq dependency <dependency> <groupId>org.apache.rocketmq</groupId> <artifactId>spring-boot-starter-rocketmq</artifactId> <version>${ve ...

Java basic learning Chapter 12 common API & exceptions The reason for business trip has not been updated for a long time. I'm back to continue. I believe in perseverance, a little progress every day, and you can!!! come on. preface From graduation to work, there is no systematic sorting and recording of knowledge. Many knowledge ...

About Apache Pulsar Apache Pulsar is a top-level project of Apache Software Foundation. It is a native distributed message flow platform of the next generation cloud. It integrates message, storage and lightweight functional computing. It adopts the design of separation of computing and storage architecture, supports multi tenant, ...

1.Seata+Nacos deployment Script description client Address: https://github.com/seata/seata/tree/develop/script/client Store the configuration and SQL for the client At: undo in at mode_ Log table creation statementconf: configuration file of the clientSaga: table creation statement of the required table in Saga modeSpring: configurati ...

2. Membership method 2.1 format class Class name { Return value type member method name(parameter list ) { Member method; } } //Class name: capitalize each word //Method name: capitalize the first letter of each word from the second word. 2.2 return value type Concept: return value mainly refers to the data content returned from the m ...

I Implementation mode of scheduled task Implementation method of scheduled task: Java comes with Java util. Timer class, which allows you to schedule a Java util. TimerTask task. In this way, you can make your program execute at a certain frequency, but it can't run at a specified time. Generally used less, this article will not be introduced ...

WebMagic introduction The WebMagic project code is divided into two parts: core and extension. The core part is a simplified and modular crawler implementation, while the extension part includes some convenient and practical functions. The architecture design of WebMagic refers to scripy, and the goal is to be modular as much as possible and r ...

The main focus of creative mode is "how to create objects?", Its main feature is "separating the creation and use of objects". This can reduce the coupling degree of the system, and users do not need to pay attention to the creation details of objects. The creation mode is divided into: Singleton modeFactory method modelA ...

20 programming specifications to quickly improve code quality It is mainly divided into three parts: Naming and Comments Naming How long is the most appropriate name? There are two extremes of named length: 1 Full name nomenclature 2 Familiar with word abbreviations and nomenclature Advantages: more accurate and intuitive Disa ...

aggregate A dynamic array whose length can be changed and any data type can be maintained Interface InterfacefunctionCollectionThe most basic interface and top-level interface of the collection frameworkListCollection's sub interface, orderly storage, non unique (repeatable elements) objects, and the most commonly used interfaceSetColle ...