Overview of mysql database and its basic operation 1

1, Introduction of database and related concepts Database: warehouse for storing data; 1.DB(DateBase) data base A collection of data organized according to a data model and placed in storage 2.DBMS(DateBase Management System) Database management system Service software for manipulating and managing da ...

Posted by kkeim on Fri, 14 Feb 2020 04:54:00 -0800

Spring cloud project integration [eureka+ribbon+zuul+hystrix+hystrix dashboard]

This article is not suitable for people who do not have the foundation of spring cloud. This article is a shelf that I sorted out after learning spring cloud. Mainly for self study Students who need source code are concerned about the following official account reply: xdxcloud Service Architecture ...

Posted by wiccan8888 on Fri, 14 Feb 2020 02:47:10 -0800

Shiro Simple Use

Shiro 1. Introduction Apache Shiro is a Java security (permissions) framework. Shiro can easily develop applications that are good enough not only for JavaSE environments, but also for JavaEE environments. Shiro can complete authentication, authorization, encryption, session management, Web integration, caching, and more. Download address: ht ...

Posted by jsim on Thu, 13 Feb 2020 21:10:28 -0800

Dubbo: Deep understanding of how Dubbo source implements service references

1. Preface Earlier, we talked about how services are exported to the registry.In fact, one thing Dubbo does is publish the URL of the service to the registry.Now let's talk about how the consumer subscribes to the service from the registry and makes remote calls. 2. Reference Service Time Series Diagram First, generally speaking the general int ...

Posted by Infinitus 8 on Wed, 12 Feb 2020 09:25:50 -0800

ActiveMQ in message middleware: spring boot integrates ActiveMQ

Less nonsense, more dry goods: integration Create an initialization project for springboot Slightly (this can be done) pom.xml is introduced as follows: Note: I use 5.15.11 here, so the imported package should also be the latest 5.15.11 <dependency> <groupId>org.sprin ...

Posted by miltonos on Wed, 12 Feb 2020 07:37:00 -0800

Bug0: resolve java.io.FileNotFoundException error encountered when Hadoop plug-in runs

Problem description The following error occurred during running WordCount program in Eclipse with plug-ins (instead of manually packing and uploading servers): DEBUG - LocalFetcher 1 going to fetch: attempt_local938878567_0001_m_000000_0 WARN - job_local938878567_0001 java.lang.Exception: org.apache. ...

Posted by jeffshead on Wed, 12 Feb 2020 06:32:57 -0800

Talk about discovery group of artemis

order This paper focuses on the discovery group of artemis DiscoveryGroup activemq-artemis-2.11.0/artemis-core-client/src/main/java/org/apache/activemq/artemis/core/cluster/DiscoveryGroup.java public final class DiscoveryGroup implements ActiveMQComponent { private static final Logger logger = Logger.getLogger(DiscoveryGroup.class); pri ...

Posted by andreas on Tue, 11 Feb 2020 08:51:47 -0800

Spring Cloud advanced Road 16: service gateway integrated circuit breaker monitoring (zuul + Hystrix Dashboard)

  Preface Last article Spring Cloud advanced Road 15: service gateway integrated circuit breaker (zuul + hystrix) In, describes how the service gateway integrates the circuit breaker. However, like other service integrated circuit breakers before, we still can't see the relevant information of circ ...

Posted by r3n on Tue, 11 Feb 2020 00:09:22 -0800

Microservice framework: building of Leyou mall project

Leyou mall project construction Learning objectives 1. Understand the e-commerce industry 1.1. Project classification 1.1.1. Traditional projects 1.1.2. Internet Project 1.2. Development of e-commerce industry 1.2.1. money scene 1.2.2. data 1.2.3. Technical characteristics 1.3. Common e-commerce ...

Posted by Sam on Mon, 10 Feb 2020 22:10:48 -0800

Spark Streaming of big data technology

Spark Streaming of big data technology 1: Overview 1. Definition: Spark Streaming is used for streaming data processing. Spark Streaming supports many data input sources, such as Kafka, Flume, Twitter, ZeroMQ and simple TCP sockets. After data input, you can use Spark's highly abstract primitives such ...

Posted by croakingtoad on Mon, 10 Feb 2020 07:28:21 -0800