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Public address: java paradiseSource code: https://gitee.com/hjj520/spring-cloud-2.x I. IntroductionSpring Cloud Eureka is a service governance module under the Spring Cloud Netflix project. The Spring Cloud Netflix project is one of the subprojects of Spring Cloud. Its main content is the packaging of a series of open source products of Netfli ...

Kafka consumer Reliability assurance As a consumer, consumption data needs to consider: 1. No repeated consumption 2. No lack of consumption information Partition allocation policy There are multiple consumers in a consumer group and multiple partitions in a topic, so it is inevitable to involve the allocation of partitions, that is, to determi ...

SpringBoot 2.x based on Spring Framework 5.x The environmental requirements are as follows: JDK1.8 or above Maven 3.2 or above I use Eclipse here. IDEA is a powerful tool, but I'm not used to it   To create a SpringBoot project manually: Premise: the computer has Maven and JDK installed and configured in Eclipse Open eclipse - > New ...

If there is a table now, it records some delay messages, that is, messages that need to be sent out at a certain time in the future. The number of records in the table is uncertain. If there are many, then multiple machines are needed to execute. If there are few, then one or two will be enough. At this time, a leader election / task segmentati ...

Tomcat introduction 1. Free and open source Web application server2. A core project in the Jakarta project of the Apache Software Foundation3. Jointly developed by Apache, Sun and some companies and individuals4. Loved by Java enthusiasts and recognized by some software developers5. Currently popular Web application server Tomcat core componen ...

Code structure Configure pom file <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVers ...

shiro encryption operation Hash algorithm is generally used to generate summary information of data. It is an irreversible algorithm, which is generally suitable for storing data such as passwords, and common hash legal persons such as MD5 and SHA. In general, it is better to provide a salt for hash algorithm, such as encrypte ...

order This paper mainly studies the consumeThread of rocketmq DefaultMQPushConsumer rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/consumer/DefaultMQPushConsumer.java public class DefaultMQPushConsumer extends ClientConfig implements MQPushConsumer { private final InternalLogger log = ClientLogger.getLog(); //...... ...

[TOC] 1. Some basic terms in spark RDD: Elastically distributed datasets, the core focus of sparkOperators: Some functions for manipulating RDDapplication: user-written spark Program (DriverProgram + ExecutorProgram)job: an action class operator triggered operationstage: A set of tasks that divide a job into several stages based on dependencie ...

1. Basic description of implementation function Today we're going to use springboot for a non-web project. We're more focused on implementation, so the logic is simple. Implement the function: pass in two numbers through the main() method to sum and print. 2. Specific implementation 1. Initialize a project first We can create a projec ...