org.opensearch.search.builder.PointInTimeBuilder Maven / Gradle / Ivy
/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.search.builder;
import org.opensearch.common.Nullable;
import org.opensearch.common.ParseField;
import org.opensearch.common.io.stream.StreamInput;
import org.opensearch.common.io.stream.StreamOutput;
import org.opensearch.common.io.stream.Writeable;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.common.xcontent.ObjectParser;
import org.opensearch.common.xcontent.ToXContentObject;
import org.opensearch.common.xcontent.XContentBuilder;
import org.opensearch.common.xcontent.XContentParser;
import java.io.IOException;
import java.util.Objects;
/**
* A search request with a point in time will execute using the reader contexts associated with that point time
* instead of the latest reader contexts.
*/
public final class PointInTimeBuilder implements Writeable, ToXContentObject {
private static final ParseField ID_FIELD = new ParseField("id");
private static final ParseField KEEP_ALIVE_FIELD = new ParseField("keep_alive");
private static final ObjectParser PARSER;
static {
PARSER = new ObjectParser<>(SearchSourceBuilder.POINT_IN_TIME.getPreferredName(), XContentParams::new);
PARSER.declareString((params, id) -> params.id = id, ID_FIELD);
PARSER.declareField(
(params, keepAlive) -> params.keepAlive = keepAlive,
(p, c) -> TimeValue.parseTimeValue(p.text(), KEEP_ALIVE_FIELD.getPreferredName()),
KEEP_ALIVE_FIELD,
ObjectParser.ValueType.STRING
);
}
private static final class XContentParams {
private String id;
private TimeValue keepAlive;
}
private final String id;
private TimeValue keepAlive;
public PointInTimeBuilder(String id) {
this.id = Objects.requireNonNull(id);
}
public PointInTimeBuilder(StreamInput in) throws IOException {
id = in.readString();
keepAlive = in.readOptionalTimeValue();
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeString(id);
out.writeOptionalTimeValue(keepAlive);
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(SearchSourceBuilder.POINT_IN_TIME.getPreferredName());
builder.field(ID_FIELD.getPreferredName(), id);
if (keepAlive != null) {
builder.field(KEEP_ALIVE_FIELD.getPreferredName(), keepAlive);
}
builder.endObject();
return builder;
}
public static PointInTimeBuilder fromXContent(XContentParser parser) throws IOException {
final XContentParams params = PARSER.parse(parser, null);
if (params.id == null) {
throw new IllegalArgumentException("point int time id is not provided");
}
return new PointInTimeBuilder(params.id).setKeepAlive(params.keepAlive);
}
/**
* Returns the id of this point in time
*/
public String getId() {
return id;
}
/**
* If specified, the search layer will keep this point in time around for at least the given keep-alive.
* Otherwise, the point in time will be kept around until the original keep alive elapsed.
*/
public PointInTimeBuilder setKeepAlive(TimeValue keepAlive) {
this.keepAlive = keepAlive;
return this;
}
@Nullable
public TimeValue getKeepAlive() {
return keepAlive;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
final PointInTimeBuilder that = (PointInTimeBuilder) o;
return Objects.equals(id, that.id) && Objects.equals(keepAlive, that.keepAlive);
}
@Override
public int hashCode() {
return Objects.hash(id, keepAlive);
}
}