/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* Licensed 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 com.linkedin.pinot.transport.common;
import java.util.List;
import java.util.Random;
import com.linkedin.pinot.common.response.ServerInstance;
public class RandomReplicaSelection extends ReplicaSelection {
private final Random _rand;
public RandomReplicaSelection(long seed) {
_rand = new Random(seed);
}
@Override
public void reset(SegmentId p) {
// Nothing to be done here
}
@Override
public void reset(SegmentIdSet p) {
// Nothing to be done here
}
@Override
public ServerInstance selectServer(SegmentId p, List<ServerInstance> orderedServers, Object bucketKey) {
int size = orderedServers.size();
if (size <= 0) {
return null;
}
return orderedServers.get(Math.abs(_rand.nextInt()) % size);
}
}