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优化生成单据编号的逻辑，采用redis分布式锁的方式

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jishenghua
2026-01-26 21:41:05 +08:00
parent d3e173fe63
commit e27a424850
4 changed files with 200 additions and 21 deletions
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89
jshERP-boot/src/main/java/com/jsh/erp/service/SequenceService.java
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@@ -2,9 +2,12 @@ package com.jsh.erp.service;
import com.alibaba.fastjson.JSONObject;
import com.jsh.erp.constants.BusinessConstants;
import com.jsh.erp.datasource.entities.*;
import com.jsh.erp.datasource.mappers.*;
import com.jsh.erp.exception.JshException;
import com.jsh.erp.constants.ExceptionConstants;
import com.jsh.erp.datasource.entities.SerialNumber;
import com.jsh.erp.datasource.entities.SerialNumberEx;
import com.jsh.erp.datasource.mappers.SequenceMapperEx;
import com.jsh.erp.exception.BusinessRunTimeException;
import com.jsh.erp.utils.RedisLockUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
@@ -13,6 +16,7 @@ import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
import java.util.UUID;
/**
* Description
@@ -27,6 +31,12 @@ public class SequenceService {
@Resource
private SequenceMapperEx sequenceMapperEx;
@Resource
private RedisLockUtil redisLockUtil;
private static final long LOCK_EXPIRE_TIME = 3000; // 锁有效期3秒
private static final long LOCK_WAIT_TIME = 100; // 等待锁时间100ms
public SerialNumber getSequence(long id)throws Exception {
return null;
}
@@ -64,28 +74,65 @@ public class SequenceService {
}
/**
* 创建一个唯一的序列号
* */
@Transactional(value = "transactionManager", rollbackFor = Exception.class)
public String buildOnlyNumber()throws Exception{
Long buildOnlyNumber=null;
synchronized (this){
try{
sequenceMapperEx.updateBuildOnlyNumber(); //编号+1
buildOnlyNumber= sequenceMapperEx.getBuildOnlyNumber(BusinessConstants.DEPOT_NUMBER_SEQ);
}catch(Exception e){
JshException.writeFail(logger, e);
* 获取唯一单据编号
*/
public String buildOnlyNumber() throws Exception {
String lockKey = "sequence:lock:" + BusinessConstants.DEPOT_NUMBER_SEQ;
String requestId = UUID.randomUUID().toString(); // 唯一请求ID
boolean locked = false;
try {
// 尝试获取分布式锁
locked = redisLockUtil.tryLock(
lockKey,
requestId,
LOCK_EXPIRE_TIME,
LOCK_WAIT_TIME
);
if (!locked) {
throw new BusinessRunTimeException(ExceptionConstants.SEQUENCE_ONLY_FAILED_CODE, ExceptionConstants.SEQUENCE_ONLY_FAILED_MSG);
}
// 执行业务逻辑
return doGenerateSequence();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new BusinessRunTimeException(ExceptionConstants.SEQUENCE_ONLY_BREAK_CODE, ExceptionConstants.SEQUENCE_ONLY_BREAK_MSG);
} finally {
// 释放锁
if (locked) {
redisLockUtil.unlock(lockKey, requestId);
}
}
if(buildOnlyNumber<BusinessConstants.SEQ_TO_STRING_MIN_LENGTH){
StringBuffer sb=new StringBuffer(buildOnlyNumber.toString());
int len=BusinessConstants.SEQ_TO_STRING_MIN_LENGTH.toString().length()-sb.length();
for(int i=0;i<len;i++){
sb.insert(0,BusinessConstants.SEQ_TO_STRING_LESS_INSERT);
}
/**
* 实际生成单据编号
*/
private String doGenerateSequence() throws Exception {
try {
// 执行数据库更新
sequenceMapperEx.updateBuildOnlyNumber();
Long number = sequenceMapperEx.getBuildOnlyNumber(BusinessConstants.DEPOT_NUMBER_SEQ);
// 格式化返回
return formatNumber(number);
} catch (Exception e) {
logger.error("生成单据编号失败", e);
throw new BusinessRunTimeException(ExceptionConstants.SEQUENCE_ONLY_BREAK_CODE, ExceptionConstants.SEQUENCE_ONLY_BREAK_MSG);
}
}
/**
* 格式化数字
*/
private String formatNumber(Long number) {
if (number < BusinessConstants.SEQ_TO_STRING_MIN_LENGTH) {
StringBuffer sb = new StringBuffer(number.toString());
int len = BusinessConstants.SEQ_TO_STRING_MIN_LENGTH.toString().length() - sb.length();
for (int i = 0; i < len; i++) {
sb.insert(0, BusinessConstants.SEQ_TO_STRING_LESS_INSERT);
}
return sb.toString();
}else{
return buildOnlyNumber.toString();
} else {
return number.toString();
}
}
}