redisロックRedlock
3565 ワード
参考記事:https://blog.csdn.net/pfnie/article/details/52234735#commentBox
public class RedisUtil {
//
public static int ONE_DAY = 60 * 60 * 24;
// ,
private static long LOCK_EXPIRE = 60L;
//
private static long LOCK_TIME_OUT = 10L * 1000000000L;
//
private static String LOCK_KEY = "lock";
//
private static String LOCK_VALUE = "1";
public void lock(StringRedisTemplate template) {
//
long nowTime = System.nanoTime();
//
Random r = new Random();
RedisConnection connection = template.getConnectionFactory().getConnection();
try {
long l = System.nanoTime() - nowTime;
while (l < LOCK_TIME_OUT) {
//
if (connection.setNX(LOCK_KEY.getBytes(), LOCK_VALUE.getBytes())) {
// , , ,
template.expire(LOCK_KEY, LOCK_EXPIRE, TimeUnit.SECONDS);
break;
} else {
// , 。 ,
Thread.sleep(5, r.nextInt(100));
l = System.nanoTime() - nowTime;
}
}
if (l > LOCK_TIME_OUT) {
System.out.println(" ");
System.out.println(" :" + l);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
connection.close();
}
}
public void unLock(StringRedisTemplate template) {
template.delete(LOCK_KEY);
}
}