AndersonChoi

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

AndersonChoi

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software

AndersonChoi

MongoDB

Introduce this document

C++로 작성된 오픈소스 문서지향적 Cross-platform 데이터베이스인 mongodb의 명령어를 모은 document입니다.

Database 조회/생성/삭제

DB 생성하기

$ use testdb

AndersonChoi

Kafka 2.0.0 Cheat Sheet

Kafka Topics

List existing topics

./kafka-topics --zookeeper localhost:2181 --list

Describe a topic

./kafka-topics --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

./kafka-topics --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

AndersonChoi

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class Main{


    public static void main(String []args){
        System.out.println("Hello World");

AndersonChoi

<?xml version = "1.0" encoding = "UTF-8"?>

<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

   <!-- 간단한 bean 설정 -->
   <bean id = "..." class = "...">

AndersonChoi

package com.company;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.IntSummaryStatistics;
import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;
import java.util.Map;

public class Main {

AndersonChoi

class NewBook extends AbstractBook{
  private final int code=2;
  private final int point=800;
  
}

AndersonChoi

class ChildBook extends AbstractBook{
  private final int code=1;
  private final int point=1000;
  
}

AndersonChoi

abstract class AbstractBook implements Book{
  
  public int priceCode(){
    return this.code;
  }
  
  public int getPointPercent(){
    return this.point;
  }