CardinalityInstance.java

/*
 * Copyright (c) 2015 Spotify AB.
 *
 * 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 com.spotify.heroic.aggregation.cardinality;

import com.spotify.heroic.aggregation.AggregationInstance;
import com.spotify.heroic.aggregation.BucketAggregationInstance;
import com.spotify.heroic.metric.MetricType;
import com.spotify.heroic.metric.Point;
import lombok.Data;
import lombok.EqualsAndHashCode;

import java.beans.ConstructorProperties;

@Data
@EqualsAndHashCode(callSuper = true)
public class CardinalityInstance extends BucketAggregationInstance<CardinalityBucket> {
    private final CardinalityMethod method;

    @ConstructorProperties({"size", "extent", "method"})
    public CardinalityInstance(final long size, final long extent, CardinalityMethod method) {
        super(size, extent, ALL_TYPES, MetricType.POINT);
        this.method = method;
    }

    @Override
    public boolean distributable() {
        return true;
    }

    @Override
    public AggregationInstance reducer() {
        return new CardinalityInstance(size, extent, method.reducer());
    }

    @Override
    public AggregationInstance distributed() {
        return new DistributedCardinalityInstance(size, extent, method);
    }

    @Override
    protected CardinalityBucket buildBucket(long timestamp) {
        return method.build(timestamp);
    }

    @Override
    protected Point build(CardinalityBucket bucket) {
        return new Point(bucket.timestamp(), bucket.count());
    }
}