forked from voldemort/voldemort
/
RouteToAllStrategy.java
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/
RouteToAllStrategy.java
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/*
* Copyright 2008-2013 LinkedIn, Inc
*
* 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 voldemort.routing;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import voldemort.cluster.Node;
/**
* A routing strategy which just routes each request to all the nodes given.
*
* Pretend that there is one partition ID "0" that all keys map to and that is
* replicated on all nodes.
*
*/
public class RouteToAllStrategy implements RoutingStrategy {
final private Collection<Node> nodes;
final private ArrayList<Integer> partitionIds;
final private int imaginaryPartitionId = 0;
public RouteToAllStrategy(Collection<Node> nodes) {
this.nodes = nodes;
this.partitionIds = new ArrayList<Integer>(1);
this.partitionIds.add(imaginaryPartitionId);
}
@Override
public int getNumReplicas() {
return nodes.size();
}
@Override
public List<Node> routeRequest(byte[] key) {
return new ArrayList<Node>(nodes);
}
@Override
public Set<Node> getNodes() {
return new HashSet<Node>(nodes);
}
@Override
public List<Integer> getPartitionList(byte[] key) {
return partitionIds;
}
@Override
public List<Integer> getReplicatingPartitionList(int partitionId) {
return partitionIds;
}
/**
* Obtain the master partition for a given key
*
* @param key
* @return
*/
@Override
public Integer getMasterPartition(byte[] key) {
return imaginaryPartitionId;
}
@Override
public String getType() {
return RoutingStrategyType.TO_ALL_STRATEGY;
}
}