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Background and objectives To develop a new project, we need to build a new project. We often copy and paste configuration from other existing projects. It is inevitable that we will step into a hole because of some detailed configuration. Especially for new employees, when they don't know the compan ...

In this post: Introduction to Quartz Quartz Quick Start Guide This article only does the introduction and the effect preview project construction, does not do the code analysis. Introduction to Quartz Quartz is a rich and open source job scheduling library that can be integrated into almost any Java application, from the smallest stand-alo ...

Directory navigation Preface data storage Using zookeeper based on Java API Event mechanism How to register event mechanism watcher event type What kind of operation will produce what kind of event? Implementation principle of transaction In depth analysis of the implementation principle of Watcher ...

GitLab CI enables you to create multiple builds and evaluate whether each code submission passes the test and the impact on your product. In the process of building, a large number of binary files will be generated. If these files are not managed correctly on a large scale, the binary file management will be confused. In order to overcome thi ...

State & Fault Tolerance Stateful function s and operators for flow processing can store the calculation state of each Event in the flow calculation process. State computation is the construction of precise operation will not or lack of plate. Flink needs to know the status of the computing node, so ...

1. Introduction to installation environment: Installation environment for demo mongo:Binary installation package mongoDB3.6.16Grant mongodb the Super Administrator account: mongo --host 127.0.0.1 --port 6068 db.createUser({user: 'root', pwd:'TdLLQ6689', roles:[{role: 'root', db: 'admin'}]}); use admin db.auth("root","TdLLQ6689") Database build ...

The partitioner of MapReduce is HashPartitionerPrinciple: first, hash the key output from the map, then reduce the number of tasks on the module. According to the result, determine the output kv pair, which is taken by the matching reduce task.Custom partition needs to inherit the Partitioner and copy the getpariton() methodCustom partition cl ...

In the previous article, we talked about how to consume services through RestTemplate+Ribbon. This article mainly talks about how to consume services through Feign. 1. Introduction to FeignFeign is a declarative pseudo-Http client that makes it easier to write Http clients.With Feign, you only need to create an interface and annotate it.It has ...

Blockchain tutorial's Fabric1.0 source code analysis Ledger II. Ledger of Fabric 1.0 source code Notes Supplement the definition of commonledger.Ledger interface embedded in PeerLedger interface as follows: type Ledger interface {     GetBlockchainInfo() (*common.BlockchainInfo, error) //Get the basic information of blockchain     GetBlockByNum ...

Background: There is a maven private server built in the company, and a core jar package has been made. At the beginning, it was XXX core.1.0.0.snapshot version, which can be used normally in both local and project environments. In order to support the launch and release a stable version, XXX core.1.0.0.jar. The local compilation is normal, t ...