com.hazelcast.partition.strategy.StringAndPartitionAwarePartitioningStrategy Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.partition.strategy;
import com.hazelcast.core.PartitionAware;
import com.hazelcast.core.PartitioningStrategy;
public final class StringAndPartitionAwarePartitioningStrategy implements PartitioningStrategy {
//since the StringAndPartitionAwarePartitioningStrategy is stateless, we can just create an instance up front
//and keep reusing that. No need to create an instance of this class of it isn't needed.
public static final StringAndPartitionAwarePartitioningStrategy INSTANCE
= new StringAndPartitionAwarePartitioningStrategy();
//we don't want instance.
private StringAndPartitionAwarePartitioningStrategy() {
}
@Override
public Object getPartitionKey(Object key) {
if (key instanceof String) {
return StringPartitioningStrategy.getPartitionKey((String) key);
} else if (key instanceof PartitionAware) {
return ((PartitionAware) key).getPartitionKey();
}
return null;
}
}