org.elasticsearch.search.builder.PointInTimeBuilder 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 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.builder;
import org.elasticsearch.action.search.SearchContextId;
import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.core.Nullable;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.ParseField;
import org.elasticsearch.xcontent.ToXContentFragment;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.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, ToXContentFragment {
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.encodedId = 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 encodedId;
private TimeValue keepAlive;
}
private final String encodedId;
private transient SearchContextId searchContextId; // lazily decoded from the encodedId
private TimeValue keepAlive;
public PointInTimeBuilder(String pitID) {
this.encodedId = Objects.requireNonNull(pitID, "Point in time ID must be provided");
}
public PointInTimeBuilder(StreamInput in) throws IOException {
encodedId = in.readString();
keepAlive = in.readOptionalTimeValue();
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeString(encodedId);
out.writeOptionalTimeValue(keepAlive);
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.field(ID_FIELD.getPreferredName(), encodedId);
if (keepAlive != null) {
builder.field(KEEP_ALIVE_FIELD.getPreferredName(), keepAlive.getStringRep());
}
return builder;
}
public static PointInTimeBuilder fromXContent(XContentParser parser) throws IOException {
final XContentParams params = PARSER.parse(parser, null);
if (params.encodedId == null) {
throw new IllegalArgumentException("point in time id is not provided");
}
return new PointInTimeBuilder(params.encodedId).setKeepAlive(params.keepAlive);
}
/**
* Returns the encoded id of this point in time
*/
public String getEncodedId() {
return encodedId;
}
/**
* Returns the search context of this point in time from its encoded id.
*/
public SearchContextId getSearchContextId(NamedWriteableRegistry namedWriteableRegistry) {
if (searchContextId == null) {
searchContextId = SearchContextId.decode(namedWriteableRegistry, encodedId);
}
return searchContextId;
}
/**
* 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;
}
/**
* 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(String keepAlive) {
return setKeepAlive(TimeValue.parseTimeValue(keepAlive, "keep_alive"));
}
@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(encodedId, that.encodedId) && Objects.equals(keepAlive, that.keepAlive);
}
@Override
public int hashCode() {
return Objects.hash(encodedId, keepAlive);
}
}