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Message filtering Message filtering means that consumers do not want to consume all the messages in the topic, but only some specific messages. Selecting these specific messages from topic is called message filtering. Message shunting can be achieved through message filtering, such as producer-produced messages. Headers may be different, so we ...

springboot integrates oss to upload, view, delete and download files 1. What is Object Storage OSS? Answer: Aliyun Object Storage Service (OSS) is a massive, secure, low-cost and highly reliable cloud storage service provided by Aliyun. Its data design persistence is not less than 99.999999% (129), ...

In the process of software development, sometimes we encounter the need to decouple the specific business so that each module is only responsible for the corresponding processing logic. For example, in our abstract business logic, there is a driver responsible for the destination. Now our business syste ...

1. Introduction In some management systems, it is commonly used. Some tree data, such as department organization and authority, are used to generate tree data. Some tree data generation tools need to be written. Generally, recursive methods are used, and poor performance may lead to stack explosion. After analysis and reflection, I decided not ...

load balancing We all know that in a micro-service architecture, micro-services always need to call each other to fulfill some of the requirements of the combined business.For example, assembling order details data, since order details contain user information, the order service must invoke the user service to obtain user information.To make r ...

Java Logging Framework As a Java programmer, it must be inseparable from the log framework. Now the best Java log framework is Log4j2, not one of them. According to the official test, Log4j2's asynchronous log performance is better in multi-threaded environment. In asynchronous logging, Log4j2 uses separate threads to perform I/O operations, w ...

1. overview What does the java crawler series contain? Introduction to java crawler framework webmgic Using webmgic to crawl the movie resources in http://ady01.com (action movie list page, movie download address, etc.) Using webmgic to crawl course resources for geek time (article series and video series) The main contents of this article ar ...

1. Trampling Records in Spring Use image Spring uses multiple data sources through annotations Pit: @Autowire is automatically injected by byType, while @Resource is automatically injected by byName by default, @Primary is the preferred choice. For example, in a project there are two Redis sources, dataRedisTemplate and red ...

Using java to write code, nine out of ten are writing Java classes to build Java objects. lombok has said a lot before, but after so many years of use, it still feels like there are many skills to use. Undoubtedly, using lombok, the java code is elegant, and the class created by using Lombok is the same as that created by ordinary java encoding ...

Using Spring Data Neo4j Reference documents: https://docs.spring.io/spring-data/neo4j/docs/5.0.7.RELEASE/reference/html/#reference Use of SDN in Spring Boot The following can be added to the pom dependency: Note: SDN uses Bolt Driver connections by default. To use embedded driver or HTTP driver, you need to add depende ...