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KairosDB is a fast distributed scalable time series abstraction on top of Cassandra.

There is a newer version: 1.2.28

/*
 * Copyright 2016 KairosDB Authors
 *
 *    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 org.kairosdb.plugin;

import org.kairosdb.core.datastore.DataPointGroup;

public interface Aggregator {
    DataPointGroup aggregate(DataPointGroup dataPointGroup);

    boolean canAggregate(String groupType);

    String getAggregatedGroupType(String groupType);
}