/*
* 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.sortedset;
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.DoubleWrapper;
import org.apache.geode.redis.internal.ExecutionHandlerContext;
import org.apache.geode.redis.internal.Extendable;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;
import org.apache.geode.redis.internal.RedisDataType;
import org.apache.geode.redis.internal.executor.SortedSetQuery;
public class ZRankExecutor extends SortedSetExecutor implements Extendable {
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
if (commandElems.size() < 3) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), getArgsError()));
return;
}
ByteArrayWrapper key = command.getKey();
checkDataType(key, RedisDataType.REDIS_SORTEDSET, context);
Region<ByteArrayWrapper, DoubleWrapper> keyRegion = getRegion(context, key);
if (keyRegion == null) {
command.setResponse(Coder.getNilResponse(context.getByteBufAllocator()));
return;
}
ByteArrayWrapper member = new ByteArrayWrapper(commandElems.get(2));
DoubleWrapper value = keyRegion.get(member);
if (value == null) {
command.setResponse(Coder.getNilResponse(context.getByteBufAllocator()));
return;
}
int rank;
try {
rank = getRange(context, key, member, value);
} catch (Exception e) {
throw new RuntimeException(e);
}
command.setResponse(Coder.getIntegerResponse(context.getByteBufAllocator(), rank));
}
private int getRange(ExecutionHandlerContext context, ByteArrayWrapper key,
ByteArrayWrapper member, DoubleWrapper valueWrapper) throws Exception {
Query query;
if (isReverse())
query = getQuery(key, SortedSetQuery.ZREVRANK, context);
else
query = getQuery(key, SortedSetQuery.ZRANK, context);
Object[] params = {valueWrapper.score, valueWrapper.score, member};
SelectResults<?> results = (SelectResults<?>) query.execute(params);
return (Integer) results.asList().get(0);
}
protected boolean isReverse() {
return false;
}
@Override
public String getArgsError() {
return ArityDef.ZRANK;
}
}