Example usage for org.springframework.data.redis.connection RedisConnection setNX

Introduction

In this page you can find the example usage for org.springframework.data.redis.connection RedisConnection setNX.

Prototype

@Nullable
Boolean setNX(byte[] key, byte[] value);

Source Link

Document

Set value for key , only if key does not exist.

Usage

From source file:com.github.deerapple.spring.redis.UserDao.java

@Override
public boolean add(final User user) {
    boolean result = redisTemplate.execute(new RedisCallback<Boolean>() {

        @Override//from   w w w.jav a  2s .  co  m
        public Boolean doInRedis(RedisConnection rc) throws DataAccessException {
            RedisSerializer<String> serializer = getRedisSerializer();
            byte[] key = serializer.serialize(user.getId());
            byte[] name = serializer.serialize(user.getKey());
            return rc.setNX(key, name);
        }
    });
    return result;
}

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From source file:com.zxy.commons.cache.RedisCache.java

/**
 * {@inheritDoc}/*from  ww  w  .j  a v a  2 s .  c om*/
 */
@Override
public ValueWrapper putIfAbsent(Object key, Object value) {
    return redisTemplate.execute(new RedisCallback<ValueWrapper>() {
        public ValueWrapper doInRedis(RedisConnection connection) throws DataAccessException {
            byte[] keyb = SerializationUtils.serialize(key);
            byte[] valueb = SerializationUtils.serialize(value);
            connection.setNX(keyb, valueb);
            if (expires > 0) {
                connection.expire(keyb, expires);
            }
            return new SimpleValueWrapper(value);
        }
    });
}

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From source file:com.mauersu.util.redis.DefaultValueOperations.java

public Boolean setIfAbsent(K key, V value) {
    final byte[] rawKey = rawKey(key);
    final byte[] rawValue = rawValue(value);

    return execute(new RedisCallback<Boolean>() {

        public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
            connection.select(dbIndex);//from w w  w  .j a  va  2  s  . c  o m
            return connection.setNX(rawKey, rawValue);
        }
    }, true);
}

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From source file:com.zxy.commons.cache.RedisUtils.java

/**
 * Set {@code value} for {@code key}, only if {@code key} does not exist.
 * <p>//  w  w w  . j  av a2s  . co m
 * See http://redis.io/commands/setnx
 * 
 * @param key must not be {@literal null}.
 * @param value must not be {@literal null}.
 * @return Boolean
 */
public static Boolean setNX(byte[] key, byte[] value) {
    return redisTemplate.execute(new RedisCallback<Boolean>() {
        @Override
        public Boolean doInRedis(RedisConnection redis) throws DataAccessException {
            return redis.setNX(key, value);
        }
    });
}

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From source file:com.zxy.commons.cache.RedisHelper.java

/**
 * Set {@code value} for {@code key}, only if {@code key} does not exist.
 * <p>//w  w  w  . j  a va2 s . c  o  m
 * See http://redis.io/commands/setnx
 * 
 * @param key must not be {@literal null}.
 * @param value must not be {@literal null}.
 * @return Boolean
 */
public Boolean setNX(byte[] key, byte[] value) {
    return redisTemplate.execute(new RedisCallback<Boolean>() {
        @Override
        public Boolean doInRedis(RedisConnection redis) throws DataAccessException {
            return redis.setNX(key, value);
        }
    });
}

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From source file:org.springframework.data.redis.cache.RedisCache.java

public ValueWrapper putIfAbsent(Object key, final Object value) {

    final byte[] keyBytes = computeKey(key);
    final byte[] valueBytes = convertToBytesIfNecessary(template.getValueSerializer(), value);

    return toWrapper(template.execute(new RedisCallback<Object>() {
        public Object doInRedis(RedisConnection connection) throws DataAccessException {

            waitForLock(connection);//from  ww w. j a  v  a  2s .com

            Object resultValue = value;
            boolean valueWasSet = connection.setNX(keyBytes, valueBytes);
            if (valueWasSet) {
                connection.zAdd(setName, 0, keyBytes);
                if (expiration > 0) {
                    connection.expire(keyBytes, expiration);
                    // update the expiration of the set of keys as well
                    connection.expire(setName, expiration);
                }
            } else {
                resultValue = deserializeIfNecessary(template.getValueSerializer(), connection.get(keyBytes));
            }

            return resultValue;
        }
    }, true));
}

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