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feat(#2023): Provide REST endpoint to fetch measurement counts
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...er/src/main/java/org/apache/streampipes/dataexplorer/influx/DataLakeMeasurementCount.java
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| /* | ||
| * 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. | ||
| * | ||
| */ | ||
|
|
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| package org.apache.streampipes.dataexplorer.influx; | ||
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| import org.apache.streampipes.dataexplorer.param.model.AggregationFunction; | ||
| import org.apache.streampipes.model.datalake.DataLakeMeasure; | ||
| import org.apache.streampipes.model.schema.EventProperty; | ||
| import org.apache.streampipes.model.schema.PropertyScope; | ||
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|
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| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.stream.Collectors; | ||
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| public class DataLakeMeasurementCount { | ||
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| private final List<DataLakeMeasure> allMeasurements; | ||
| private final List<String> measurementNames; | ||
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| public DataLakeMeasurementCount(List<DataLakeMeasure> allMeasurements, | ||
| List<String> measurementNames) { | ||
| this.allMeasurements = allMeasurements; | ||
| this.measurementNames = measurementNames; | ||
| } | ||
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| public Map<String, Integer> countMeasurementSizes() { | ||
| Map<String, CompletableFuture<Integer>> futures = measurementNames.stream() | ||
| .distinct() | ||
| .map(this::getMeasure) | ||
| .collect(Collectors.toMap(DataLakeMeasure::getMeasureName, m -> CompletableFuture.supplyAsync(() -> { | ||
| var firstColumn = getFirstColumn(m); | ||
| var builder = DataLakeInfluxQueryBuilder | ||
| .create(m.getMeasureName()).withEndTime(System.currentTimeMillis()) | ||
| .withAggregatedColumn(firstColumn, AggregationFunction.COUNT); | ||
| var start = System.currentTimeMillis(); | ||
| var queryResult = new DataExplorerInfluxQueryExecutor().executeQuery(builder.build(), true); | ||
| var end = System.currentTimeMillis(); | ||
| System.out.println(m.getMeasureName() + " took " + (end - start)); | ||
| if (queryResult.getTotal() == 0) { | ||
| return 0; | ||
| } else { | ||
| var headers = queryResult.getHeaders(); | ||
| return ((Double) ( | ||
| queryResult.getAllDataSeries().get(0).getRows().get(0).get(headers.indexOf("count"))) | ||
| ).intValue(); | ||
| } | ||
| }))); | ||
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| Map<String, Integer> result = new HashMap<>(); | ||
| for (Map.Entry<String, CompletableFuture<Integer>> entry : futures.entrySet()) { | ||
| try { | ||
| result.put(entry.getKey(), entry.getValue().get()); | ||
| } catch (InterruptedException | ExecutionException e) { | ||
| result.put(entry.getKey(), 0); | ||
| } | ||
| } | ||
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| return result; | ||
| } | ||
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| private DataLakeMeasure getMeasure(String measureName) { | ||
| return allMeasurements | ||
| .stream() | ||
| .filter(m -> m.getMeasureName().equals(measureName)) | ||
| .findFirst() | ||
| .orElse(null); | ||
| } | ||
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| private String getFirstColumn(DataLakeMeasure measure) { | ||
| return measure.getEventSchema().getEventProperties() | ||
| .stream() | ||
| .filter(ep -> ep.getPropertyScope() != null | ||
| && ep.getPropertyScope().equals(PropertyScope.MEASUREMENT_PROPERTY.name())) | ||
| .map(EventProperty::getRuntimeName) | ||
| .findFirst() | ||
| .orElse(null); | ||
| } | ||
| } |
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