配置地址:
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redisson:
# Redis服务地址 如果集群使用","进行分割
server-address: redis: // ${spring.redis.host}:${spring.redis.port}
database: ${spring.redis.database}
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创建配置类:
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@ConfigurationProperties(prefix = "redisson" )
@Configuration
public class RedissonConfig {
/** Redis服务地址 如果集群使用 "," 进行分割 */
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;
}
}
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注册redission Bean:
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/**
* 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) {
// 单例redis
config.useSingleServer()
.setAddress(redissonConfig.getServerAddress())
.setDatabase(redissonConfig.getDatabase());
} else {
// 集群redis
config.useClusterServers().addNodeAddress(serverAddressArr);
}
return Redisson.create(config);
}
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防止重复初始化:
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**
* 初始化告警统计记录 保证告警统计不会被重复初始化
*
* @param areaId 部门 id
* @throws BizException
*/
public void initWarningStatisticsSafe(String areaId) throws BizException {
// 创建锁名称
String lockName = generateInitWarningStatisticsLockName(areaId);
RLock lock = redisClient.getLock(lockName);
try {
// 尝试获取锁 (最多尝试10秒,获取到后15秒后释放锁)
boolean isAcquireLock = lock.tryLock(10, 15, TimeUnit.SECONDS);
if (!isAcquireLock) {
logger.error( "初始化消息统计 --- 获取锁失败 lockName = " + lockName);
throw new BizException( "系统异常" );
} else {
try {
// 查询【告警统计】 (能够查询到最新的数据,因为默认隔离级别是 read committed
List<WarningStatisticsPO> warningStatisticsPOS = warningStatisticsDAO.selectByArea(areaId);
if (CollectionUtils.isEmpty(warningStatisticsPOS)) {
// 如果部门不存在告警统计,才进行初始化 initWarningStatistics()会开启一个新事务
warningStatisticsService.initWarningStatistics(areaId);
}
} finally {
// 释放锁 (在事务提交后才释放锁。保证其它事务在获取锁后能查询到数据,不会再进行初始化。)
lock.unlock();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
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原文链接:https://blog.csdn.net/qq_41434746/article/details/109841021