配置地址:
redisson:
# Redis服務(wù)地址 如果集群使用","進(jìn)行分割
server-address: redis://${spring.redis.host}:${spring.redis.port}
database: ${spring.redis.database}
創(chuàng)建配置類:
@ConfigurationProperties(prefix = "redisson")
@Configuration
public class RedissonConfig {
/** Redis服務(wù)地址 如果集群使用","進(jìn)行分割 */
private String serverAddress;
private Integer database;
public String getServerAddress() {
return serverAddress;
}
public void setServerAddress(String serverAddresss) {
this.serverAddress = serverAddresss;
}
public Integer getDatabase() {
return database;
}
public void setDatabase(Integer database) {
this.database = database;
}
}
注冊redission Bean:
/**
* RedissonClient
* @return
*/
@Bean
public RedissonClient redissonClient(){
String splitChar = ",";
String serverAddress = redissonConfig.getServerAddress();
String[] serverAddressArr = serverAddress.split(splitChar);
Config config = new Config();
if (serverAddressArr.length == 1) {
//單例redis
config.useSingleServer()
.setAddress(redissonConfig.getServerAddress())
.setDatabase(redissonConfig.getDatabase());
} else {
//集群redis
config.useClusterServers().addNodeAddress(serverAddressArr);
}
return Redisson.create(config);
}
防止重復(fù)初始化:
**
* 初始化告警統(tǒng)計(jì)記錄 保證告警統(tǒng)計(jì)不會被重復(fù)初始化
*
* @param areaId 部門id
* @throws BizException
*/
public void initWarningStatisticsSafe(String areaId) throws BizException {
//創(chuàng)建鎖名稱
String lockName = generateInitWarningStatisticsLockName(areaId);
RLock lock = redisClient.getLock(lockName);
try {
//嘗試獲取鎖 (最多嘗試10秒,獲取到后15秒后釋放鎖)
boolean isAcquireLock = lock.tryLock(10, 15, TimeUnit.SECONDS);
if (!isAcquireLock) {
logger.error("初始化消息統(tǒng)計(jì) --- 獲取鎖失敗 lockName = " + lockName);
throw new BizException("系統(tǒng)異常");
} else {
try {
//查詢【告警統(tǒng)計(jì)】 (能夠查詢到最新的數(shù)據(jù),因?yàn)槟J(rèn)隔離級別是read committed
ListWarningStatisticsPO> warningStatisticsPOS = warningStatisticsDAO.selectByArea(areaId);
if (CollectionUtils.isEmpty(warningStatisticsPOS)) {
//如果部門不存在告警統(tǒng)計(jì),才進(jìn)行初始化 initWarningStatistics()會開啟一個(gè)新事務(wù)
warningStatisticsService.initWarningStatistics(areaId);
}
} finally {
//釋放鎖 (在事務(wù)提交后才釋放鎖。保證其它事務(wù)在獲取鎖后能查詢到數(shù)據(jù),不會再進(jìn)行初始化。)
lock.unlock();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
到此這篇關(guān)于redission分布式鎖防止重復(fù)初始化問題的文章就介紹到這了,更多相關(guān)redission分布式鎖內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家!
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