/*
* 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.list;
import java.util.List;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.query.Query;
import org.apache.geode.cache.query.SelectResults;
import org.apache.geode.redis.internal.ByteArrayWrapper;
import org.apache.geode.redis.internal.Coder;
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.RedisConstants.ArityDef;
import org.apache.geode.redis.internal.executor.ListQuery;
public class LSetExecutor extends ListExecutor {
private final String ERROR_NOT_NUMERIC = "The index provided is not numeric";
private final String ERROR_INDEX =
"The index provided is not within range of this list or the key does not exist";
private final String SUCCESS = "OK";
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
if (commandElems.size() < 4) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.LSET));
return;
}
ByteArrayWrapper key = command.getKey();
byte[] indexArray = commandElems.get(2);
byte[] value = commandElems.get(3);
int index;
checkDataType(key, RedisDataType.REDIS_LIST, context);
Region<Integer, ByteArrayWrapper> keyRegion = getRegion(context, key);
if (keyRegion == null) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_INDEX));
return;
}
try {
index = Coder.bytesToInt(indexArray);
} catch (NumberFormatException e) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_NOT_NUMERIC));
return;
}
int listSize = keyRegion.size() - LIST_EMPTY_SIZE;
if (index < 0)
index += listSize;
if (index < 0 || index > listSize) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_INDEX));
return;
}
Integer indexKey;
try {
indexKey = getIndexKey(context, key, index);
} catch (Exception e) {
throw new RuntimeException(e);
}
if (indexKey == null) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ERROR_INDEX));
return;
}
if (index == listSize)
indexKey++;
keyRegion.put(indexKey, new ByteArrayWrapper(value));
command.setResponse(Coder.getSimpleStringResponse(context.getByteBufAllocator(), SUCCESS));
}
private Integer getIndexKey(ExecutionHandlerContext context, ByteArrayWrapper key, int index)
throws Exception {
Query query = getQuery(key, ListQuery.LSET, context);
Object[] params = {Integer.valueOf(index + 1)};
SelectResults<Integer> results = (SelectResults<Integer>) query.execute(params);
int size = results.size();
if (results == null || size == 0) {
return null;
}
return results.asList().get(size - 1);
}
}