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Elasticsearch subproject :server
/*
* 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 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.aggregations.timeseries;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.search.aggregations.AggregationReduceContext;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.InternalMultiBucketAggregation;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import static org.elasticsearch.search.aggregations.ParsedMultiBucketAggregation.declareMultiBucketAggregationFields;
public class InternalTimeSeries extends InternalMultiBucketAggregation
implements
TimeSeries {
private static final ObjectParser PARSER = new ObjectParser<>(
ParsedTimeSeries.class.getSimpleName(),
true,
ParsedTimeSeries::new
);
static {
declareMultiBucketAggregationFields(
PARSER,
parser -> ParsedTimeSeries.ParsedBucket.fromXContent(parser, false),
parser -> ParsedTimeSeries.ParsedBucket.fromXContent(parser, true)
);
}
public static class InternalBucket extends InternalMultiBucketAggregation.InternalBucket implements TimeSeries.Bucket {
protected long bucketOrd;
protected final boolean keyed;
protected final Map key;
protected long docCount;
protected InternalAggregations aggregations;
public InternalBucket(Map key, long docCount, InternalAggregations aggregations, boolean keyed) {
this.key = key;
this.docCount = docCount;
this.aggregations = aggregations;
this.keyed = keyed;
}
/**
* Read from a stream.
*/
public InternalBucket(StreamInput in, boolean keyed) throws IOException {
this.keyed = keyed;
key = in.readOrderedMap(StreamInput::readString, StreamInput::readGenericValue);
docCount = in.readVLong();
aggregations = InternalAggregations.readFrom(in);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeMap(key, StreamOutput::writeString, StreamOutput::writeGenericValue);
out.writeVLong(docCount);
aggregations.writeTo(out);
}
@Override
public Map getKey() {
return key;
}
@Override
public String getKeyAsString() {
return key.toString();
}
@Override
public long getDocCount() {
return docCount;
}
@Override
public InternalAggregations getAggregations() {
return aggregations;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (keyed) {
builder.startObject(getKeyAsString());
} else {
builder.startObject();
}
builder.field(CommonFields.KEY.getPreferredName(), key);
builder.field(CommonFields.DOC_COUNT.getPreferredName(), docCount);
aggregations.toXContentInternal(builder, params);
builder.endObject();
return builder;
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
InternalTimeSeries.InternalBucket that = (InternalTimeSeries.InternalBucket) other;
return Objects.equals(key, that.key)
&& Objects.equals(keyed, that.keyed)
&& Objects.equals(docCount, that.docCount)
&& Objects.equals(aggregations, that.aggregations);
}
@Override
public int hashCode() {
return Objects.hash(getClass(), key, keyed, docCount, aggregations);
}
}
private final List buckets;
private final boolean keyed;
// bucketMap gets lazily initialized from buckets in getBucketByKey()
private transient Map bucketMap;
public InternalTimeSeries(String name, List buckets, boolean keyed, Map metadata) {
super(name, metadata);
this.buckets = buckets;
this.keyed = keyed;
}
/**
* Read from a stream.
*/
public InternalTimeSeries(StreamInput in) throws IOException {
super(in);
keyed = in.readBoolean();
int size = in.readVInt();
List buckets = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
buckets.add(new InternalTimeSeries.InternalBucket(in, keyed));
}
this.buckets = buckets;
this.bucketMap = null;
}
@Override
public String getWriteableName() {
return TimeSeriesAggregationBuilder.NAME;
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
if (keyed) {
builder.startObject(CommonFields.BUCKETS.getPreferredName());
} else {
builder.startArray(CommonFields.BUCKETS.getPreferredName());
}
for (InternalBucket bucket : buckets) {
bucket.toXContent(builder, params);
}
if (keyed) {
builder.endObject();
} else {
builder.endArray();
}
return builder;
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeBoolean(keyed);
out.writeCollection(buckets);
}
@Override
public InternalAggregation reduce(List aggregations, AggregationReduceContext reduceContext) {
// We still need to reduce in case we got the same time series in 2 different indices, but we should be able to optimize
// that in the future
Map, List> bucketsList = null;
for (InternalAggregation aggregation : aggregations) {
InternalTimeSeries timeSeries = (InternalTimeSeries) aggregation;
if (bucketsList != null) {
for (InternalBucket bucket : timeSeries.buckets) {
bucketsList.compute(bucket.key, (map, list) -> {
if (list == null) {
list = new ArrayList<>();
}
list.add(bucket);
return list;
});
}
} else {
bucketsList = new HashMap<>(timeSeries.buckets.size());
for (InternalTimeSeries.InternalBucket bucket : timeSeries.buckets) {
List bucketList = new ArrayList<>();
bucketList.add(bucket);
bucketsList.put(bucket.key, bucketList);
}
}
}
reduceContext.consumeBucketsAndMaybeBreak(bucketsList.size());
InternalTimeSeries reduced = new InternalTimeSeries(name, new ArrayList<>(bucketsList.size()), keyed, getMetadata());
for (Map.Entry, List> bucketEntry : bucketsList.entrySet()) {
reduced.buckets.add(reduceBucket(bucketEntry.getValue(), reduceContext));
}
return reduced;
}
@Override
public InternalTimeSeries create(List buckets) {
return new InternalTimeSeries(name, buckets, keyed, metadata);
}
@Override
public InternalBucket createBucket(InternalAggregations aggregations, InternalBucket prototype) {
return new InternalBucket(prototype.key, prototype.docCount, aggregations, prototype.keyed);
}
@Override
protected InternalBucket reduceBucket(List buckets, AggregationReduceContext context) {
InternalTimeSeries.InternalBucket reduced = null;
List aggregationsList = new ArrayList<>(buckets.size());
for (InternalTimeSeries.InternalBucket bucket : buckets) {
if (reduced == null) {
reduced = new InternalTimeSeries.InternalBucket(bucket.key, bucket.docCount, bucket.aggregations, bucket.keyed);
} else {
reduced.docCount += bucket.docCount;
}
aggregationsList.add(bucket.aggregations);
}
reduced.aggregations = InternalAggregations.reduce(aggregationsList, context);
return reduced;
}
@Override
public List getBuckets() {
return buckets;
}
@Override
public InternalBucket getBucketByKey(String key) {
if (bucketMap == null) {
bucketMap = new HashMap<>(buckets.size());
for (InternalBucket bucket : buckets) {
bucketMap.put(bucket.getKeyAsString(), bucket);
}
}
return bucketMap.get(key);
}
}