forked from elastic/elasticsearch
-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
885015b
commit 1c20caa
Showing
5 changed files
with
330 additions
and
75 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
158 changes: 158 additions & 0 deletions
158
...n/profiling/src/main/java/org/elasticsearch/xpack/profiling/action/SubGroupCollector.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License | ||
| * 2.0; you may not use this file except in compliance with the Elastic License | ||
| * 2.0. | ||
| */ | ||
|
|
||
| package org.elasticsearch.xpack.profiling.action; | ||
|
|
||
| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
| import org.elasticsearch.search.aggregations.AbstractAggregationBuilder; | ||
| import org.elasticsearch.search.aggregations.InternalAggregations; | ||
| import org.elasticsearch.search.aggregations.bucket.MultiBucketsAggregation; | ||
| import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder; | ||
|
|
||
| import java.util.Iterator; | ||
|
|
||
| public final class SubGroupCollector { | ||
| /** | ||
| * Users may provide a custom field via the API that is used to sub-divide profiling events. This is useful in the context of TopN | ||
| * where we want to provide additional breakdown of where a certain function has been called (e.g. a certain service or transaction). | ||
| */ | ||
| static final String CUSTOM_EVENT_SUB_AGGREGATION_NAME = "custom_event_group_"; | ||
|
|
||
| private static final Logger log = LogManager.getLogger(SubGroupCollector.class); | ||
|
|
||
| private final String[] aggregationFields; | ||
| private final boolean legacyAggregationField; | ||
| private final AbstractAggregationBuilder<?> parentAggregation; | ||
|
|
||
| public static SubGroupCollector attach( | ||
| AbstractAggregationBuilder<?> parentAggregation, | ||
| String[] aggregationFields, | ||
| boolean legacyAggregationField | ||
| ) { | ||
| SubGroupCollector c = new SubGroupCollector(parentAggregation, aggregationFields, legacyAggregationField); | ||
| c.addAggregations(); | ||
| return c; | ||
| } | ||
|
|
||
| private SubGroupCollector(AbstractAggregationBuilder<?> parentAggregation, String[] aggregationFields, boolean legacyAggregationField) { | ||
| this.parentAggregation = parentAggregation; | ||
| this.aggregationFields = aggregationFields; | ||
| this.legacyAggregationField = legacyAggregationField; | ||
| } | ||
|
|
||
| private boolean hasAggregationFields() { | ||
| return aggregationFields != null && aggregationFields.length > 0; | ||
| } | ||
|
|
||
| private void addAggregations() { | ||
| if (hasAggregationFields()) { | ||
| // cast to Object to disambiguate this from a varargs call | ||
| log.trace("Grouping stacktrace events by {}.", (Object) aggregationFields); | ||
| AbstractAggregationBuilder<?> parentAgg = this.parentAggregation; | ||
| for (String aggregationField : aggregationFields) { | ||
| String aggName = CUSTOM_EVENT_SUB_AGGREGATION_NAME + aggregationField; | ||
| TermsAggregationBuilder agg = new TermsAggregationBuilder(aggName).field(aggregationField); | ||
| parentAgg.subAggregation(agg); | ||
| parentAgg = agg; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| void collectResults(MultiBucketsAggregation.Bucket bucket, TraceEvent event) { | ||
| collectResults(new BucketAdapter(bucket), event); | ||
| } | ||
|
|
||
| void collectResults(Bucket bucket, TraceEvent event) { | ||
| if (hasAggregationFields()) { | ||
| if (event.subGroups == null) { | ||
| event.subGroups = SubGroup.root(aggregationFields[0], legacyAggregationField); | ||
| } | ||
| collectInternal(bucket.getAggregations(), event.subGroups, 0); | ||
| } | ||
| } | ||
|
|
||
| private void collectInternal(Agg parentAgg, SubGroup parentGroup, int aggField) { | ||
| if (aggField == aggregationFields.length) { | ||
| return; | ||
| } | ||
| String aggName = CUSTOM_EVENT_SUB_AGGREGATION_NAME + aggregationFields[aggField]; | ||
| for (Bucket b : parentAgg.getBuckets(aggName)) { | ||
| String subGroupName = b.getKey(); | ||
| parentGroup.addCount(subGroupName, b.getCount()); | ||
| SubGroup currentGroup = parentGroup.getSubGroup(subGroupName); | ||
| int nextAggField = aggField + 1; | ||
| if (nextAggField < aggregationFields.length) { | ||
| collectInternal(b.getAggregations(), currentGroup.getOrAddChild(aggregationFields[nextAggField]), nextAggField); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // The sole purpose of the code below is to abstract our code from the aggs framework to make it unit-testable | ||
| interface Agg { | ||
| Iterable<Bucket> getBuckets(String aggName); | ||
|
|
||
| } | ||
|
|
||
| interface Bucket { | ||
| String getKey(); | ||
|
|
||
| long getCount(); | ||
|
|
||
| Agg getAggregations(); | ||
| } | ||
|
|
||
| static class InternalAggregationAdapter implements Agg { | ||
| private final InternalAggregations agg; | ||
|
|
||
| InternalAggregationAdapter(InternalAggregations agg) { | ||
| this.agg = agg; | ||
| } | ||
|
|
||
| @Override | ||
| public Iterable<Bucket> getBuckets(String aggName) { | ||
| MultiBucketsAggregation multiBucketsAggregation = agg.get(aggName); | ||
| return () -> { | ||
| Iterator<? extends MultiBucketsAggregation.Bucket> it = multiBucketsAggregation.getBuckets().iterator(); | ||
| return new Iterator<>() { | ||
| @Override | ||
| public boolean hasNext() { | ||
| return it.hasNext(); | ||
| } | ||
|
|
||
| @Override | ||
| public Bucket next() { | ||
| return new BucketAdapter(it.next()); | ||
| } | ||
| }; | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| static class BucketAdapter implements Bucket { | ||
| private final MultiBucketsAggregation.Bucket bucket; | ||
|
|
||
| BucketAdapter(MultiBucketsAggregation.Bucket bucket) { | ||
| this.bucket = bucket; | ||
| } | ||
|
|
||
| @Override | ||
| public String getKey() { | ||
| return bucket.getKeyAsString(); | ||
| } | ||
|
|
||
| @Override | ||
| public long getCount() { | ||
| return bucket.getDocCount(); | ||
| } | ||
|
|
||
| @Override | ||
| public Agg getAggregations() { | ||
| return new InternalAggregationAdapter(bucket.getAggregations()); | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.