Introduction to Elasticsearch

outline What is Elasticsearch? Elasticsearch, a distributed, high-performance, highly available, scalable search and analysis system. Applicable scenarios of Elasticsearch E-commerce website searchData analysisBI systemLog analysis elk, etc Lucene and Elasticsearch Lucene Lucene is a sub project of the jakarta project team of apache So ...

Posted on Mon, 29 Nov 2021 18:54:50 -0500 by sem_db

The Sims - Programming girl

The name is very long, and the program is as long as the name. It is estimated that it is mainly to increase the amount of code reading (increase the difficulty) There are many menus, so you don't copy the code. The important contents are as follows: wroking's job is to earn money. After watching it for a long time, I feel useless. I ask for ...

Posted on Mon, 29 Nov 2021 17:24:59 -0500 by Perad

Spring certified China Education Management Center - Spring Data MongoDB tutorial 15

Original title: Spring certified China Education Management Center - Spring Data MongoDB tutorial 15 (content source: Spring China Education Management Center)18.7.1. Save using the registered Spring converterThe following example shows the implementation org.bson.Document of Converter converting from Person object to a:import org.springframewo ...

Posted on Mon, 29 Nov 2021 17:38:00 -0500 by sarika

The of Java design pattern -- meta pattern

1. What is the meta model? Use sharing to support large numbers of fine-grained objects efficiently. Flyweight Pattern: using shared objects can effectively support a large number of fine-grained objects. Human words: reuse objects and save memory. 2. Meta mode definition ① , Flyweight - Abstract meta role Is an abstract class of a ...

Posted on Mon, 29 Nov 2021 19:08:55 -0500 by pod2oo5

springboot dynamic multi data source configuration and usage (read data source configuration from database)

The principle and basic implementation of dynamic multiple data sources have been described in the last two times. The previous data source configuration is to configure multiple data sources from application.yml. Here, we will expand and supplement other scenarios. How to read the data source without configuring it from application.yml, so as ...

Posted on Mon, 29 Nov 2021 19:27:00 -0500 by janek211

Stone scissors paper game for three-year-old children

1, Foreword    learning python a while ago, I wrote a game of stone, scissors and paper with the purpose of learning while practicing. The execution method is to directly execute python code in the shell environment, Python learning notes scissors stone cloth Let the baby play. The baby can play with stone, scissors and paper by choo ...

Posted on Mon, 29 Nov 2021 19:13:20 -0500 by edup_pt