Java Transaction.expire方法代碼示例

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
/**
 * 方案一的壞處：
 * 假如在極端情況下，可能出現集群各個服務器同時執行到taskLockVersionOne，或者 doTask執行時間過長，
 * 在redis事物還沒提交的時候，會出現同時有多台服務器執行doTask。
 * @param id
 */
private static void taskLockVersionOne(String id) {
	String key = "default_task_id";
	String value = jedis.get(key);
	// 用redis 事物是防止 在set成功之後 在執行doTask或者其他情況導致程序終止沒有執行到transaction.expire（）
	// 導致單台機器一直占著鎖會有單點事故
	Transaction transaction = null;
	try {
		transaction = jedis.multi();
		if (value == null) {
			transaction.set(key, id);
			doTask(id);
			// 設置過期是防止單點錯誤
			transaction.expire(key, 30);
		} else {
			if (value.equals(id)) {
				doTask(id);
			}
		}
	} catch (Exception e) {
		log.error("e" + e);
	} finally {
		transaction.exec();
	}
}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
/**
 * 方案二：
 * 會重複兩次回去jedis.get(key);
 * 同時如果expire時間小於doTask時間，也會出現同時有兩個任務執行doTask情況。
 * @param id
 */
private static void taskLockVersionTwo(String id) {
	String key = "default_task_id";
	String value = jedis.get(key);
	// 用redis 事物是防止 在set成功之後 在執行doTask或者其他情況導致程序終止沒有執行到transaction.expire（）
	// 導致單台機器一直占著鎖會有單點事故
	Transaction transaction = null;
	try {
		transaction = jedis.multi();
		if (value == null) {
			transaction.set(key, id);
			transaction.expire(key, 30);
		}
	} catch (Exception e) {
		log.error("e" + e);
	} finally {
		transaction.exec();
	}
	value = jedis.get(key);
	if (value.equals(id)) {
		doTask(id);
	}
}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
public static void main(String[] args) throws InterruptedException {
	ApplicationContext ac = new ClassPathXmlApplicationContext("root-context.xml");
	JedisPool pool = (JedisPool) ac.getBean("jedisPool");
	int count = 0;
	while (true) {
		Jedis jedis = pool.getResource();
		jedis.get("keyName");
		Transaction tx = jedis.multi();
		tx.incr("keyName");
		tx.expire("keyName", 10);
		tx.exec();	
		jedis.close();
		System.out.println("jedisPool active count:" + pool.getNumActive());
		System.out.println("jedisPool idle count:" + pool.getNumIdle());
		Thread.sleep(10);
	}

}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
public void transactionNoPipeline() {
  Jedis jedis = pool.getResource();
  try {
    Transaction tx = jedis.multi();
    for (int i = 0; i < rowCount; i++) {
      String key = RandomStringUtils.randomAlphabetic(8);
      tx.set(key, RandomStringUtils.randomNumeric(5));
      tx.expire(key, 5 * 60);
    }
    tx.exec();
  } catch (Exception e) {
    pool.returnResource(jedis);
  }
}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
public void add(String key, String value) {
    if(fake) {
        ConcurrentLinkedQueue<String> stack = circularStackMap.get(key);
        if(stack==null) {
            synchronized(circularStackMap) {
                stack = circularStackMap.get(key);
                if(stack==null) {
                    stack = new ConcurrentLinkedQueue<String>();
                    circularStackMap.put(key, stack);
                }
            }
        }
        stack.add(value);
        while(stack.size() > capacity) {
            stack.poll();
        }
    } else {
        try(Jedis jedis = jedisPool.getResource()) {
            Transaction transaction = jedis.multi();
            transaction.lpush(key, value);
            transaction.ltrim(key, 0, capacity); // right away trim to capacity so that we can pretend it is a circular list
            transaction.expire(key, expireInSeconds); // don't keep the data forever
            transaction.exec();
        } catch (JedisException e) {
            // make sure we can find back jedis related stuff in kibana
            throw new IllegalStateException("problem connecting to jedis", e);
        }
    }
}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
public void increment(String key, int windowInSecond) throws Exception {

        long currentMs = System.currentTimeMillis();
        long maxScoreMs = currentMs - windowInSecond * 1000;

        Transaction redis = jedisPool.getResource().multi();
        redis.zremrangeByScore(key, 0, maxScoreMs);
        redis.zadd(key, currentMs, currentMs + "-" + Math.random()); //keep members unique
        redis.expire(key, windowInSecond);
        redis.exec();
    }
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
@Override
protected boolean onFailure(Map<String, Response<Long>> storedValue, Transaction jedisMulti) {
    if (storedValue.get(Const.REDIS_SERVICE_CAPACITY_DAILY_TTL).get() < 0) {
        String serviceId = requestInfo.getServiceId();
        String serviceQuota = ehcacheFactory.getServiceInfoCache()
                .get(serviceId).getDailyCapacity();
        jedisMulti.hset(Const.REDIS_SERVICE_CAPACITY_DAILY, serviceId, serviceQuota);
        jedisMulti.expire(Const.REDIS_SERVICE_CAPACITY_DAILY, Const.SECOND_OF_DAY);
        return true;
    }
    return false;
}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
private void bumpTimeout() {
    try (Jedis jedis = sessionManager.jedisPool.getResource()) {
        Transaction transaction = jedis.multi();
        transaction.expire(sessionId, maxInactiveInterval);
        transaction.expire(sessionId + CREATED_FIELD, maxInactiveInterval);

        transaction.exec();
    }
}
 

import redis.clients.jedis.Transaction; //導入方法依賴的package包/類
public void setAndExpireWithTran(){
    Jedis jedis = getResource();
    try {
        Transaction transaction = jedis.multi();
        transaction.set("x", Long.valueOf(count.incrementAndGet()).toString());
        transaction.expire("x", 600);
        transaction.exec();
    }finally {
        returnResource(jedis);
    }

}