JedisClusterListCommands.java

/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.redis.connection.jedis;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.ClusterSlotHashUtil;
import org.springframework.data.redis.connection.RedisListCommands;
import org.springframework.data.redis.connection.jedis.JedisClusterConnection.JedisMultiKeyClusterCommandCallback;
import org.springframework.util.CollectionUtils;

/**
 * @author Christoph Strobl
 * @since 2.0
 */
class JedisClusterListCommands implements RedisListCommands {

	private final JedisClusterConnection connection;

	public JedisClusterListCommands(JedisClusterConnection connection) {
		this.connection = connection;
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#rPush(byte[], byte[][])
	 */
	@Override
	public Long rPush(byte[] key, byte[]... values) {

		try {
			return connection.getCluster().rpush(key, values);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lPush(byte[], byte[][])
	 */
	@Override
	public Long lPush(byte[] key, byte[]... values) {

		try {
			return connection.getCluster().lpush(key, values);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#rPushX(byte[], byte[])
	 */
	@Override
	public Long rPushX(byte[] key, byte[] value) {

		try {
			return connection.getCluster().rpushx(key, value);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lPushX(byte[], byte[])
	 */
	@Override
	public Long lPushX(byte[] key, byte[] value) {

		try {
			return connection.getCluster().lpushx(key, value);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lLen(byte[])
	 */
	@Override
	public Long lLen(byte[] key) {

		try {
			return connection.getCluster().llen(key);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lRange(byte[], long, long)
	 */
	@Override
	public List<byte[]> lRange(byte[] key, long begin, long end) {

		try {
			return connection.getCluster().lrange(key, begin, end);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lTrim(byte[], long, long)
	 */
	@Override
	public void lTrim(final byte[] key, final long begin, final long end) {

		try {
			connection.getCluster().ltrim(key, begin, end);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lIndex(byte[], long)
	 */
	@Override
	public byte[] lIndex(byte[] key, long index) {

		try {
			return connection.getCluster().lindex(key, index);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lInsert(byte[], org.springframework.data.redis.connection.RedisListCommands.Position, byte[], byte[])
	 */
	@Override
	public Long lInsert(byte[] key, Position where, byte[] pivot, byte[] value) {

		try {
			return connection.getCluster().linsert(key, JedisConverters.toListPosition(where), pivot, value);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lSet(byte[], long, byte[])
	 */
	@Override
	public void lSet(byte[] key, long index, byte[] value) {

		try {
			connection.getCluster().lset(key, index, value);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lRem(byte[], long, byte[])
	 */
	@Override
	public Long lRem(byte[] key, long count, byte[] value) {

		try {
			return connection.getCluster().lrem(key, count, value);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#lPop(byte[])
	 */
	@Override
	public byte[] lPop(byte[] key) {

		try {
			return connection.getCluster().lpop(key);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#rPop(byte[])
	 */
	@Override
	public byte[] rPop(byte[] key) {

		try {
			return connection.getCluster().rpop(key);
		} catch (Exception ex) {
			throw convertJedisAccessException(ex);
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#bLPop(int, byte[][])
	 */
	@Override
	public List<byte[]> bLPop(final int timeout, final byte[]... keys) {

		if (ClusterSlotHashUtil.isSameSlotForAllKeys(keys)) {
			try {
				return connection.getCluster().blpop(timeout, keys);
			} catch (Exception ex) {
				throw convertJedisAccessException(ex);
			}
		}

		return connection.getClusterCommandExecutor()
				.executeMuliKeyCommand(
						(JedisMultiKeyClusterCommandCallback<List<byte[]>>) (client, key) -> client.blpop(timeout, key),
						Arrays.asList(keys))
				.getFirstNonNullNotEmptyOrDefault(Collections.<byte[]> emptyList());
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#bRPop(int, byte[][])
	 */
	@Override
	public List<byte[]> bRPop(final int timeout, byte[]... keys) {

		return connection.getClusterCommandExecutor()
				.executeMuliKeyCommand(
						(JedisMultiKeyClusterCommandCallback<List<byte[]>>) (client, key) -> client.brpop(timeout, key),
						Arrays.asList(keys))
				.getFirstNonNullNotEmptyOrDefault(Collections.<byte[]> emptyList());
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#rPopLPush(byte[], byte[])
	 */
	@Override
	public byte[] rPopLPush(byte[] srcKey, byte[] dstKey) {

		if (ClusterSlotHashUtil.isSameSlotForAllKeys(srcKey, dstKey)) {
			try {
				return connection.getCluster().rpoplpush(srcKey, dstKey);
			} catch (Exception ex) {
				throw convertJedisAccessException(ex);
			}
		}

		byte[] val = rPop(srcKey);
		lPush(dstKey, val);
		return val;
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.data.redis.connection.RedisListCommands#bRPopLPush(int, byte[], byte[])
	 */
	@Override
	public byte[] bRPopLPush(int timeout, byte[] srcKey, byte[] dstKey) {

		if (ClusterSlotHashUtil.isSameSlotForAllKeys(srcKey, dstKey)) {
			try {
				return connection.getCluster().brpoplpush(srcKey, dstKey, timeout);
			} catch (Exception ex) {
				throw convertJedisAccessException(ex);
			}
		}

		List<byte[]> val = bRPop(timeout, srcKey);
		if (!CollectionUtils.isEmpty(val)) {
			lPush(dstKey, val.get(1));
			return val.get(1);
		}

		return null;
	}

	private DataAccessException convertJedisAccessException(Exception ex) {
		return connection.convertJedisAccessException(ex);
	}
}