org.elasticsearch.xpack.core.rollup.job.HistogramGroupConfig Maven / Gradle / Ivy
/*
* 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.core.rollup.job;
import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.fieldcaps.FieldCapabilities;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.xcontent.ConstructingObjectParser;
import org.elasticsearch.common.xcontent.ToXContentObject;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.xpack.core.rollup.RollupField;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import static org.elasticsearch.common.xcontent.ConstructingObjectParser.constructorArg;
/**
* The configuration object for the histograms in the rollup config
*
* {
* "groups": [
* "histogram": {
* "fields" : [ "foo", "bar" ],
* "interval" : 123
* }
* ]
* }
*/
public class HistogramGroupConfig implements Writeable, ToXContentObject {
public static final String NAME = "histogram";
public static final String INTERVAL = "interval";
private static final String FIELDS = "fields";
private static final ConstructingObjectParser PARSER;
static {
PARSER = new ConstructingObjectParser<>(NAME, args -> {
@SuppressWarnings("unchecked") List fields = (List) args[1];
return new HistogramGroupConfig((long) args[0], fields != null ? fields.toArray(new String[fields.size()]) : null);
});
PARSER.declareLong(constructorArg(), new ParseField(INTERVAL));
PARSER.declareStringArray(constructorArg(), new ParseField(FIELDS));
}
private final long interval;
private final String[] fields;
public HistogramGroupConfig(final long interval, final String... fields) {
if (interval <= 0) {
throw new IllegalArgumentException("Interval must be a positive long");
}
if (fields == null || fields.length == 0) {
throw new IllegalArgumentException("Fields must have at least one value");
}
this.interval = interval;
this.fields = fields;
}
public HistogramGroupConfig(final StreamInput in) throws IOException {
interval = in.readVLong();
fields = in.readStringArray();
}
public long getInterval() {
return interval;
}
public String[] getFields() {
return fields;
}
public void validateMappings(Map> fieldCapsResponse,
ActionRequestValidationException validationException) {
Arrays.stream(fields).forEach(field -> {
Map fieldCaps = fieldCapsResponse.get(field);
if (fieldCaps != null && fieldCaps.isEmpty() == false) {
fieldCaps.forEach((key, value) -> {
if (RollupField.NUMERIC_FIELD_MAPPER_TYPES.contains(key)) {
if (value.isAggregatable() == false) {
validationException.addValidationError("The field [" + field + "] must be aggregatable across all indices, " +
"but is not.");
}
} else {
validationException.addValidationError("The field referenced by a histo group must be a [numeric] type, " +
"but found " + fieldCaps.keySet().toString() + " for field [" + field + "]");
}
});
} else {
validationException.addValidationError("Could not find a [numeric] field with name [" + field
+ "] in any of the indices matching the index pattern.");
}
});
}
@Override
public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
builder.startObject();
{
builder.field(INTERVAL, interval);
builder.field(FIELDS, fields);
}
builder.endObject();
return builder;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeVLong(interval);
out.writeStringArray(fields);
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final HistogramGroupConfig that = (HistogramGroupConfig) other;
return Objects.equals(interval, that.interval) && Arrays.equals(fields, that.fields);
}
@Override
public int hashCode() {
return Objects.hash(interval, Arrays.hashCode(fields));
}
@Override
public String toString() {
return Strings.toString(this, true, true);
}
public static HistogramGroupConfig fromXContent(final XContentParser parser) throws IOException {
return PARSER.parse(parser, null);
}
}