| /* |
| * 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 org.apache.accumulo.test.functional; |
| |
| import org.apache.accumulo.core.client.summary.Summarizer; |
| import org.apache.accumulo.core.client.summary.SummarizerConfiguration; |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Value; |
| |
| /** |
| * This summarizer collects some very basic statistics about Keys. |
| */ |
| public class BasicSummarizer implements Summarizer { |
| |
| public static final String DELETES_STAT = "deletes"; |
| public static final String MIN_TIMESTAMP_STAT = "minTimestamp"; |
| public static final String MAX_TIMESTAMP_STAT = "maxTimestamp"; |
| public static final String TOTAL_STAT = "total"; |
| |
| @Override |
| public Collector collector(SummarizerConfiguration sc) { |
| return new Collector() { |
| |
| private long minStamp = Long.MAX_VALUE; |
| private long maxStamp = Long.MIN_VALUE; |
| private long deletes = 0; |
| private long total = 0; |
| |
| @Override |
| public void accept(Key k, Value v) { |
| if (k.getTimestamp() < minStamp) { |
| minStamp = k.getTimestamp(); |
| } |
| |
| if (k.getTimestamp() > maxStamp) { |
| maxStamp = k.getTimestamp(); |
| } |
| |
| if (k.isDeleted()) { |
| deletes++; |
| } |
| |
| total++; |
| } |
| |
| @Override |
| public void summarize(StatisticConsumer sc) { |
| sc.accept(MIN_TIMESTAMP_STAT, minStamp); |
| sc.accept(MAX_TIMESTAMP_STAT, maxStamp); |
| sc.accept(DELETES_STAT, deletes); |
| sc.accept(TOTAL_STAT, total); |
| } |
| }; |
| } |
| |
| @Override |
| public Combiner combiner(SummarizerConfiguration sc) { |
| return (stats1, stats2) -> { |
| stats1.merge(DELETES_STAT, stats2.get(DELETES_STAT), Long::sum); |
| stats1.merge(TOTAL_STAT, stats2.get(TOTAL_STAT), Long::sum); |
| stats1.merge(MIN_TIMESTAMP_STAT, stats2.get(MIN_TIMESTAMP_STAT), Long::min); |
| stats1.merge(MAX_TIMESTAMP_STAT, stats2.get(MAX_TIMESTAMP_STAT), Long::max); |
| }; |
| } |
| } |