| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You 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.apache.geode.redis.internal.data; |
| |
| import static org.apache.geode.redis.internal.data.RedisDataType.REDIS_HASH; |
| import static org.apache.geode.redis.internal.data.RedisDataType.REDIS_SET; |
| import static org.apache.geode.redis.internal.data.RedisDataType.REDIS_STRING; |
| import static org.apache.geode.redis.internal.data.RedisHash.NULL_REDIS_HASH; |
| import static org.apache.geode.redis.internal.data.RedisSet.NULL_REDIS_SET; |
| import static org.apache.geode.redis.internal.data.RedisString.NULL_REDIS_STRING; |
| |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.redis.internal.RedisConstants; |
| import org.apache.geode.redis.internal.executor.StripedExecutor; |
| import org.apache.geode.redis.internal.statistics.RedisStats; |
| |
| /** |
| * Provides methods to help implement command execution. |
| * This class provides resources needed to execute |
| * a command on RedisData, for example the region the data |
| * is stored in and the stats that need to be updated. |
| * It does not keep any state changed by a command so a |
| * single instance of it can be used concurrently by |
| * multiple commands and a canonical instance can be used |
| * to prevent garbage creation. |
| */ |
| public class CommandHelper { |
| private final Region<ByteArrayWrapper, RedisData> region; |
| private final RedisStats redisStats; |
| private final StripedExecutor stripedExecutor; |
| |
| public Region<ByteArrayWrapper, RedisData> getRegion() { |
| return region; |
| } |
| |
| public RedisStats getRedisStats() { |
| return redisStats; |
| } |
| |
| public StripedExecutor getStripedExecutor() { |
| return stripedExecutor; |
| } |
| |
| public CommandHelper( |
| Region<ByteArrayWrapper, RedisData> region, |
| RedisStats redisStats, |
| StripedExecutor stripedExecutor) { |
| this.region = region; |
| this.redisStats = redisStats; |
| this.stripedExecutor = stripedExecutor; |
| } |
| |
| RedisData getRedisData(ByteArrayWrapper key) { |
| return getRedisData(key, RedisData.NULL_REDIS_DATA); |
| } |
| |
| RedisData getRedisData(ByteArrayWrapper key, RedisData notFoundValue) { |
| RedisData result = region.get(key); |
| if (result != null) { |
| if (result.hasExpired()) { |
| result.doExpiration(this, key); |
| result = null; |
| } |
| } |
| if (result == null) { |
| return notFoundValue; |
| } else { |
| return result; |
| } |
| } |
| |
| RedisSet getRedisSet(ByteArrayWrapper key, boolean updateStats) { |
| RedisData redisData = getRedisData(key, NULL_REDIS_SET); |
| if (updateStats) { |
| if (redisData == NULL_REDIS_SET) { |
| redisStats.incKeyspaceMisses(); |
| } else { |
| redisStats.incKeyspaceHits(); |
| } |
| } |
| return checkSetType(redisData); |
| } |
| |
| private RedisSet checkSetType(RedisData redisData) { |
| if (redisData == null) { |
| return null; |
| } |
| if (redisData.getType() != REDIS_SET) { |
| throw new RedisDataTypeMismatchException(RedisConstants.ERROR_WRONG_TYPE); |
| } |
| return (RedisSet) redisData; |
| } |
| |
| RedisHash getRedisHash(ByteArrayWrapper key, boolean updateStats) { |
| RedisData redisData = getRedisData(key, NULL_REDIS_HASH); |
| if (updateStats) { |
| if (redisData == NULL_REDIS_HASH) { |
| redisStats.incKeyspaceMisses(); |
| } else { |
| redisStats.incKeyspaceHits(); |
| } |
| } |
| return checkHashType(redisData); |
| } |
| |
| private RedisHash checkHashType(RedisData redisData) { |
| if (redisData == null) { |
| return null; |
| } |
| if (redisData.getType() != REDIS_HASH) { |
| throw new RedisDataTypeMismatchException(RedisConstants.ERROR_WRONG_TYPE); |
| } |
| return (RedisHash) redisData; |
| } |
| |
| private RedisString checkStringType(RedisData redisData, boolean ignoreTypeMismatch) { |
| if (redisData == null) { |
| return null; |
| } |
| if (redisData.getType() != REDIS_STRING) { |
| if (ignoreTypeMismatch) { |
| return NULL_REDIS_STRING; |
| } |
| throw new RedisDataTypeMismatchException(RedisConstants.ERROR_WRONG_TYPE); |
| } |
| return (RedisString) redisData; |
| } |
| |
| RedisString getRedisString(ByteArrayWrapper key, boolean updateStats) { |
| RedisData redisData = getRedisData(key, NULL_REDIS_STRING); |
| if (updateStats) { |
| if (redisData == NULL_REDIS_STRING) { |
| redisStats.incKeyspaceMisses(); |
| } else { |
| redisStats.incKeyspaceHits(); |
| } |
| } |
| |
| return checkStringType(redisData, false); |
| } |
| |
| RedisString getRedisStringIgnoringType(ByteArrayWrapper key, boolean updateStats) { |
| RedisData redisData = getRedisData(key, NULL_REDIS_STRING); |
| if (updateStats) { |
| if (redisData == NULL_REDIS_STRING) { |
| redisStats.incKeyspaceMisses(); |
| } else { |
| redisStats.incKeyspaceHits(); |
| } |
| } |
| |
| return checkStringType(redisData, true); |
| } |
| |
| RedisString setRedisString(ByteArrayWrapper key, ByteArrayWrapper value) { |
| RedisString result; |
| RedisData redisData = getRedisData(key); |
| |
| if (redisData.isNull() || redisData.getType() != REDIS_STRING) { |
| result = new RedisString(value); |
| } else { |
| result = (RedisString) redisData; |
| result.set(value); |
| } |
| region.put(key, result); |
| return result; |
| } |
| } |