/*
* 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.hash;
import java.util.List;
import org.apache.geode.cache.Region;
import org.apache.geode.redis.internal.ByteArrayWrapper;
import org.apache.geode.redis.internal.Command;
import org.apache.geode.redis.internal.ExecutionHandlerContext;
import org.apache.geode.redis.internal.RedisDataType;
import org.apache.geode.redis.internal.Coder;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;
public class HGetExecutor extends HashExecutor {
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
if (commandElems.size() < 3) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.HGET));
return;
}
ByteArrayWrapper key = command.getKey();
checkDataType(key, RedisDataType.REDIS_HASH, context);
Region<ByteArrayWrapper, ByteArrayWrapper> keyRegion = getRegion(context, key);
if (keyRegion == null) {
command.setResponse(Coder.getNilResponse(context.getByteBufAllocator()));
return;
}
byte[] byteField = commandElems.get(FIELD_INDEX);
ByteArrayWrapper field = new ByteArrayWrapper(byteField);
ByteArrayWrapper valueWrapper = keyRegion.get(field);
if (valueWrapper != null) {
command.setResponse(
Coder.getBulkStringResponse(context.getByteBufAllocator(), valueWrapper.toBytes()));
} else
command.setResponse(Coder.getNilResponse(context.getByteBufAllocator()));
}
}