geode-apis-compatible-with-redis/src/main/java/org/apache/geode/redis/internal/executor/key/RenameExecutor.java

/*
 * 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.executor.key;

import static org.apache.geode.redis.internal.RedisConstants.ERROR_NO_SUCH_KEY;

import java.util.List;

import org.apache.geode.redis.internal.data.RedisKey;
import org.apache.geode.redis.internal.executor.AbstractExecutor;
import org.apache.geode.redis.internal.executor.RedisResponse;
import org.apache.geode.redis.internal.netty.Command;
import org.apache.geode.redis.internal.netty.ExecutionHandlerContext;

public class RenameExecutor extends AbstractExecutor {

  @Override
  public RedisResponse executeCommand(Command command,
      ExecutionHandlerContext context) {
    List<RedisKey> commandElems = command.getProcessedCommandKeys();
    RedisKey key = command.getKey();
    RedisKey newKey = commandElems.get(2);
    RedisKeyCommands redisKeyCommands = context.getKeyCommands();

    if (key.equals(newKey)) {
      return RedisResponse.ok();
    }

    if (key.getBucketId() != newKey.getBucketId()) {
      // Will produce MOVED exceptions here for whichever key is at fault
      context.getRegionProvider().getRedisData(newKey);
      context.getRegionProvider().getRedisData(key);
    }

    if (!redisKeyCommands.rename(key, newKey)) {
      return RedisResponse.error(ERROR_NO_SUCH_KEY);
    }

    return RedisResponse.ok();
  }
}