zhugw

Foo project
@SpringBootApplication
public class FooApplication {

  public static void main(String[] args) {
    SpringApplication.run(FooApplication.class, args);
  }
  @Bean
  public Mapper fooDozerBeanMapper() {
    DozerBeanMapper mapper = BeanMapper.getDozerBeanMapper();

zhugw

// 验证并发情况下的自定义订单流水号生成器是否会有重复
// 订单流水号生成器
public static String getOrderNo(){
        String orderNo = "";
        String date = new SimpleDateFormat("yyMMddHHmmss").format(new Date());
        Integer math = new Random().nextInt(1000);
        orderNo = date+""+math;
        return orderNo;
}
// 验证代码

zhugw

```
[
    {
        "category": "tag_foo", 
        "tagPrice": [
            {
                "activeTagDictId": 370, 
                "activePrice": 39
            }, 
            {

zhugw

//如何模拟异常堆栈占用内存过多导致频繁FulGC
//java.lang.StackTraceElement数据已经占用了85M

//目前的代码不能很好的重现该问题

package com.hlj.test;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;

zhugw

#write by wozi
#!/bin/bash
HOSTS=(
    'root@101.251.1.1  7711'
    'root@172.16.1.1     7711    password'
)
function show() {
    echo 'ALL HOSTS'
    echo '==============================='
    for ((i=0; i<${#HOSTS[*]}; i++)); do

zhugw

/**
	 * 验证并发update mysql数据库记录
	 * @param args
	 * @throws SQLException
	 * @throws IOException
	 * @throws InterruptedException
	 */
	public static void main(String[] args) throws SQLException, IOException, InterruptedException {
		String url = "jdbc:mysql://localhost:3306/test";
		String user = "root";

zhugw

import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.Random;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;

/**
 * <pre>
 * 转盘抽奖算法demo

zhugw

/*******************************************************************************
 * Copyright (c) 2005, 2014 springside.github.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *******************************************************************************/
package org.springside.modules.nosql.redis;

import java.util.List;
import java.util.Map;
import java.util.Set;

zhugw

package com.zhugw;

import org.apache.commons.lang3.RandomStringUtils;

import java.sql.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**

zhugw

package com.helijia.lottery.service;

import com.helijia.common.api.model.ApiException;
import com.helijia.lottery.dao.mapper.TestMapper;
import org.apache.commons.lang.RandomStringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.stereotype.Service;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;