本文整理了Java中redis.clients.jedis.Jedis.setnx()方法的一些代码示例，展示了Jedis.setnx()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Jedis.setnx()方法的具体详情如下：
包路径：redis.clients.jedis.Jedis
类名称：Jedis
方法名：setnx

Jedis.setnx介绍

[英]SETNX works exactly like #set(String,String) with the only difference that if the key already exists no operation is performed. SETNX actually means "SET if Not eXists".

Time complexity: O(1)
[中]SETNX的工作原理与#set（String，String）完全相同，唯一的区别是，如果密钥已经存在，则不会执行任何操作。SETNX实际上意味着“如果不存在则设置”。
时间复杂度：O（1）

代码示例

代码示例来源：origin: sohutv/cachecloud

@Override
 public Long execute(Jedis connection) {
  return connection.setnx(key, value);
 }
}.run(key);

代码示例来源：origin: sohutv/cachecloud

@Override
 public Long execute(Jedis connection) {
  return connection.setnx(key, value);
 }
}.runBinary(key);

代码示例来源：origin: sohutv/cachecloud

public Long execute(Jedis connection) {
    return connection.setnx(keyByte, value);
  }
}.runBinary(keyByte);

代码示例来源：origin: sohutv/cachecloud

@Override
public Long setnx(byte[] key, byte[] value) {
 Jedis j = getShard(key);
 return j.setnx(key, value);
}

代码示例来源：origin: sohutv/cachecloud

@Override
public Long setnx(String key, String value) {
 Jedis j = getShard(key);
 return j.setnx(key, value);
}

代码示例来源：origin: ltsopensource/light-task-scheduler

public boolean acquire(Jedis jedis) {
  String value = jedis.get(lockKey);
  if (value == null) {
    boolean success = jedis.setnx(lockKey, lockValue) == 1;
    if (success) {
      jedis.expire(lockKey, expiredSeconds);
      return true;
    }
  } else if (lockValue.equals(value)) {
    jedis.expire(lockKey, expiredSeconds);
    return true;
  }
  return false;
}

代码示例来源：origin: ltsopensource/light-task-scheduler

public boolean acquire(Jedis jedis) {
  String value = jedis.get(lockKey);
  if (value == null) {
    boolean success = jedis.setnx(lockKey, lockValue) == 1;
    if (success) {
      jedis.expire(lockKey, expiredSeconds);
      return true;
    }
  } else if (lockValue.equals(value)) {
    jedis.expire(lockKey, expiredSeconds);
    return true;
  }
  return false;
}

代码示例来源：origin: qiurunze123/miaosha

/**
 * 设置失效时间
 * @param key
 * @param value
 * @return
 */
public Long setnx(String key ,String value){
  Jedis jedis =null;
  Long result = null;
  try {
    jedis = jedisPool.getResource();
    result = jedis.setnx(key,value);
  }catch (Exception e){
    log.error("expire key:{} error",key,e);
  jedisPool.returnResource(jedis);
  return  result;
  }
  jedisPool.returnResource(jedis);
  return  result;
}
/**

代码示例来源：origin: Netflix/conductor

@Override
public Long setnx(String key, String value) {
 Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();
   return jedis.setnx(key, value);
  } finally {
   if (jedis != null)
    jedis.close();
  }
}

代码示例来源：origin: qiurunze123/miaosha

public String getLock(String key , int timeOut){
  try {
      Jedis jedis =  RedisManager.getJedis();
      String value = UUID.randomUUID().toString();
      long end   =System.currentTimeMillis()+timeOut;
      while (System.currentTimeMillis()<end){
        if(jedis.setnx(key,value) ==1){
          jedis.expire(key, timeOut);
          //锁设置成功 redis操作成功
          return value;
        }
        if(jedis.ttl(key)== -1){
          jedis.expire(key, timeOut);
        }
        Thread.sleep(1000);
      }
  } catch (Exception e) {
    e.printStackTrace();
  }
  return null;
}

代码示例来源：origin: spring-projects/spring-data-redis

@Override
public Boolean setNX(byte[] key, byte[] value) {
  Assert.notNull(key, "Key must not be null!");
  Assert.notNull(value, "Value must not be null!");
  try {
    if (isPipelined()) {
      pipeline(connection.newJedisResult(connection.getRequiredPipeline().setnx(key, value),
          JedisConverters.longToBoolean()));
      return null;
    }
    if (isQueueing()) {
      transaction(connection.newJedisResult(connection.getRequiredTransaction().setnx(key, value),
          JedisConverters.longToBoolean()));
      return null;
    }
    return JedisConverters.toBoolean(connection.getJedis().setnx(key, value));
  } catch (Exception ex) {
    throw convertJedisAccessException(ex);
  }
}

代码示例来源：origin: mrdear/JavaWEB

@Override
  public Boolean doWorkCallback(Jedis jedis) {
    Long result = jedis.setnx(key,value);
    return result == 1L && jedis.expire(key, seconds) > 0;
  }
});

代码示例来源：origin: javahongxi/whatsmars

public Long setnx(String key,String value) {
  Jedis jedis = fetchResource(false);
  try {
    return jedis.setnx(key,value);
  } finally {
    if (jedis != null) {
      jedis.close();
    }
  }
}

代码示例来源：origin: jwpttcg66/NettyGameServer

/**
 * 设置
 * @param key
 * @param value
 * @return
 */
public boolean setNxStringByMillisec(String key, String value, int millisec){
  Jedis jedis = null;
  boolean success = true;
  boolean result = false;
  try {
    jedis = jedisPool.getResource();
    result = (jedis.setnx(key, value) != 0);
    if(millisec > -1){
      jedis.pexpire(key, millisec);
    }
  } catch (Exception e) {
    success = false;
    releasBrokenReidsSource(jedis, key, "setNxStringByMillisec", e, false);
  } finally {
    releaseReidsSource(success, jedis);
  }
  
  return result;
  
}

代码示例来源：origin: jwpttcg66/NettyGameServer

/**
 * 设置
 * @param key
 * @param value
 * @return
 */
public boolean setNxString(String key, String value, int seconds) throws Exception{
  Jedis jedis = null;
  boolean success = true;
  boolean result;
  try {
    jedis = jedisPool.getResource();
    result = (jedis.setnx(key, value) != 0);
    if(seconds > -1){
      jedis.expire(key, seconds);
    }
  } catch (Exception e) {
    success = false;
    releasBrokenReidsSource(jedis, key, "setNxString", e, false);
    throw e;
  } finally {
    releaseReidsSource(success, jedis);
  }
  
  return result;
  
}

代码示例来源：origin: io.leopard/leopard-redis

@Override
  public Object execute(Jedis jedis) {
    return jedis.setnx(key, value);
  }
});

代码示例来源：origin: stackoverflow.com

Message msg = ... // eg. ConsumerIterator.next().message().fromJson();
Jedis jedis = ... // eg. JedisPool.getResource();
String key = "SPOUT:" + msg.uniqId; // prefix name at will
String val = Long.toString(System.currentTimeMillis());
long rsps = jedis.setnx(key, val);
if (rsps <= 0) {
  log.warn("kafka dup: {}", msg.toJson()); // and other logic
} else {
  jedis.expire(key, 7200); // 2 hours is ok for production environment;
}

代码示例来源：origin: com.netflix.spinnaker.kork/kork-jedis

@Override
public Long setnx(String key, String value) {
 String command = "setnx";
 return instrumented(command, payloadSize(value), () -> delegated.setnx(key, value));
}

代码示例来源：origin: com.github.yamingd.argo/argo-redis

public Long execute(final Jedis conn) throws Exception {
    byte[] ds = getRedisBuffer().write(value);
    return conn.setnx(SafeEncoder.encode(key), ds);
  }
});

代码示例来源：origin: yangfuhai/jboot

@Override
public Long setnx(Object key, Object value) {
  Jedis jedis = getJedis();
  try {
    return jedis.setnx(keyToBytes(key), valueToBytes(value));
  } finally {
    returnResource(jedis);
  }
}

redis.clients.jedis.Jedis.setnx()方法的使用及代码示例

Jedis.setnx介绍

代码示例

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