/*
* 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 HIncrByFloatExecutor extends HashExecutor {
private final String ERROR_FIELD_NOT_USABLE =
"The value at this field cannot be incremented numerically because it is not a float";
private final String ERROR_INCREMENT_NOT_USABLE =
"The increment on this key must be floating point numeric";
private final int FIELD_INDEX = 2;
private final int INCREMENT_INDEX = 3;
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
if (commandElems.size() < 4) {
command.setResponse(
Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.HINCRBYFLOAT));
return;
}
byte[] incrArray = commandElems.get(INCREMENT_INDEX);
Double increment;
try {
increment = Coder.bytesToDouble(incrArray);
} catch (NumberFormatException e) {
command.setResponse(
Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_INCREMENT_NOT_USABLE));
return;
}
ByteArrayWrapper key = command.getKey();
Region<ByteArrayWrapper, ByteArrayWrapper> keyRegion =
getOrCreateRegion(context, key, RedisDataType.REDIS_HASH);
byte[] byteField = commandElems.get(FIELD_INDEX);
ByteArrayWrapper field = new ByteArrayWrapper(byteField);
/*
* Put incrememnt as value if field doesn't exist
*/
ByteArrayWrapper oldValue = keyRegion.get(field);
if (oldValue == null) {
keyRegion.put(field, new ByteArrayWrapper(incrArray));
command.setResponse(Coder.getBulkStringResponse(context.getByteBufAllocator(), increment));
return;
}
/*
* If the field did exist then increment the field
*/
String valueS = oldValue.toString();
if (valueS.contains(" ")) {
command.setResponse(
Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_FIELD_NOT_USABLE));
return;
}
Double value;
try {
value = Coder.stringToDouble(valueS);
} catch (NumberFormatException e) {
command.setResponse(
Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_FIELD_NOT_USABLE));
return;
}
value += increment;
keyRegion.put(field, new ByteArrayWrapper(Coder.doubleToBytes(value)));
command.setResponse(Coder.getBulkStringResponse(context.getByteBufAllocator(), value));
}
}