/*
* 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;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
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.RedisConstants;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;
import org.apache.geode.redis.internal.org.apache.hadoop.fs.GlobPattern;
import org.apache.geode.redis.GeodeRedisServer;
public class KeysExecutor extends AbstractExecutor {
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
if (commandElems.size() < 2) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.KEYS));
return;
}
String glob = Coder.bytesToString(commandElems.get(1));
Set<String> allKeys = context.getRegionProvider().metaKeySet();
List<String> matchingKeys = new ArrayList<String>();
Pattern pattern;
try {
pattern = GlobPattern.compile(glob);
} catch (PatternSyntaxException e) {
command.setResponse(
Coder.getErrorResponse(context.getByteBufAllocator(), RedisConstants.ERROR_ILLEGAL_GLOB));
return;
}
for (String key : allKeys) {
if (!(key.equals(GeodeRedisServer.REDIS_META_DATA_REGION)
|| key.equals(GeodeRedisServer.STRING_REGION) || key.equals(GeodeRedisServer.HLL_REGION))
&& pattern.matcher(key).matches())
matchingKeys.add(key);
}
if (matchingKeys.isEmpty())
command.setResponse(Coder.getEmptyArrayResponse(context.getByteBufAllocator()));
else
command.setResponse(
Coder.getBulkStringArrayResponse(context.getByteBufAllocator(), matchingKeys));
}
}