com.mauersu.util.redis.DefaultListOperations.java Source code

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Here is the source code for com.mauersu.util.redis.DefaultListOperations.java

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/*
 * Copyright 2011-2013 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 com.mauersu.util.redis;

import java.util.List;
import java.util.concurrent.TimeUnit;

import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.connection.RedisListCommands.Position;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.TimeoutUtils;
import org.springframework.util.CollectionUtils;

/**
 * Default implementation of {@link ListOperations}.
 * 
 * @author Costin Leau
 */
class DefaultListOperations<K, V> extends AbstractOperations<K, V> implements ListOperations<K, V> {

    DefaultListOperations(RedisTemplate<K, V> template) {
        super(template);
    }

    private volatile int dbIndex;

    DefaultListOperations(RedisTemplate<K, V> template, int dbIndex) {
        super(template);
        this.dbIndex = dbIndex;
    }

    public V index(K key, final long index) {
        return execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lIndex(rawKey, index);
            }
        }, true);
    }

    public V leftPop(K key) {
        return execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lPop(rawKey);
            }
        }, true);
    }

    public V leftPop(K key, long timeout, TimeUnit unit) {
        final int tm = (int) TimeoutUtils.toSeconds(timeout, unit);
        return execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                List<byte[]> lPop = connection.bLPop(tm, rawKey);
                return (CollectionUtils.isEmpty(lPop) ? null : lPop.get(1));
            }
        }, true);
    }

    public Long leftPush(K key, V value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawValue = rawValue(value);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lPush(rawKey, rawValue);
            }
        }, true);
    }

    public Long leftPushAll(K key, V... values) {
        final byte[] rawKey = rawKey(key);
        final byte[][] rawValues = rawValues(values);
        return execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lPush(rawKey, rawValues);
            }
        }, true);
    }

    public Long leftPushIfPresent(K key, V value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawValue = rawValue(value);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lPushX(rawKey, rawValue);
            }
        }, true);
    }

    public Long leftPush(K key, V pivot, V value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawPivot = rawValue(pivot);
        final byte[] rawValue = rawValue(value);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lInsert(rawKey, Position.BEFORE, rawPivot, rawValue);
            }
        }, true);
    }

    public Long size(K key) {
        final byte[] rawKey = rawKey(key);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lLen(rawKey);
            }
        }, true);
    }

    public List<V> range(K key, final long start, final long end) {
        final byte[] rawKey = rawKey(key);
        return execute(new RedisCallback<List<V>>() {
            public List<V> doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return deserializeValues(connection.lRange(rawKey, start, end));
            }
        }, true);
    }

    public Long remove(K key, final long count, Object value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawValue = rawValue(value);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lRem(rawKey, count, rawValue);
            }
        }, true);
    }

    public V rightPop(K key) {
        return execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                return connection.rPop(rawKey);
            }
        }, true);
    }

    public V rightPop(K key, long timeout, TimeUnit unit) {
        final int tm = (int) TimeoutUtils.toSeconds(timeout, unit);

        return execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                List<byte[]> bRPop = connection.bRPop(tm, rawKey);
                return (CollectionUtils.isEmpty(bRPop) ? null : bRPop.get(1));
            }
        }, true);
    }

    public Long rightPush(K key, V value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawValue = rawValue(value);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.rPush(rawKey, rawValue);
            }
        }, true);
    }

    public Long rightPushAll(K key, V... values) {
        final byte[] rawKey = rawKey(key);
        final byte[][] rawValues = rawValues(values);
        return execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.rPush(rawKey, rawValues);
            }
        }, true);
    }

    public Long rightPushIfPresent(K key, V value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawValue = rawValue(value);
        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.rPushX(rawKey, rawValue);
            }
        }, true);
    }

    public Long rightPush(K key, V pivot, V value) {
        final byte[] rawKey = rawKey(key);
        final byte[] rawPivot = rawValue(pivot);
        final byte[] rawValue = rawValue(value);

        return execute(new RedisCallback<Long>() {

            public Long doInRedis(RedisConnection connection) {
                connection.select(dbIndex);
                return connection.lInsert(rawKey, Position.AFTER, rawPivot, rawValue);
            }
        }, true);
    }

    public V rightPopAndLeftPush(K sourceKey, K destinationKey) {
        final byte[] rawDestKey = rawKey(destinationKey);

        return execute(new ValueDeserializingRedisCallback(sourceKey) {

            protected byte[] inRedis(byte[] rawSourceKey, RedisConnection connection) {
                connection.select(dbIndex);
                return connection.rPopLPush(rawSourceKey, rawDestKey);
            }
        }, true);
    }

    public V rightPopAndLeftPush(K sourceKey, K destinationKey, long timeout, TimeUnit unit) {
        final int tm = (int) TimeoutUtils.toSeconds(timeout, unit);
        final byte[] rawDestKey = rawKey(destinationKey);

        return execute(new ValueDeserializingRedisCallback(sourceKey) {

            protected byte[] inRedis(byte[] rawSourceKey, RedisConnection connection) {
                connection.select(dbIndex);
                return connection.bRPopLPush(tm, rawSourceKey, rawDestKey);
            }
        }, true);
    }

    public void set(K key, final long index, V value) {
        final byte[] rawValue = rawValue(value);
        execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                connection.lSet(rawKey, index, rawValue);
                return null;
            }
        }, true);
    }

    public void trim(K key, final long start, final long end) {
        execute(new ValueDeserializingRedisCallback(key) {

            protected byte[] inRedis(byte[] rawKey, RedisConnection connection) {
                connection.select(dbIndex);
                connection.lTrim(rawKey, start, end);
                return null;
            }
        }, true);
    }
}