spring-data-elasticsearch SeqNoPrimaryTerm 源码

  • 2022-08-16
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spring-data-elasticsearch SeqNoPrimaryTerm 代码


 * Copyright 2020-2022 the original author or authors.
 * Licensed 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
 *      https://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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.springframework.data.elasticsearch.core.query;

 * <p>
 * A container for seq_no and primary_term values. When an entity class contains a field of this type, it will be
 * automatically filled with SeqNoPrimaryTerm instance on read operations (like get or search), and also, when the
 * SeqNoPrimaryTerm is not {@literal null} and filled with seq_no and primary_term, they will be sent to Elasticsearch
 * when indexing such an entity.
 * </p>
 * <p>
 * This allows to implement optimistic locking pattern for full-update scenario, when an entity is first read from
 * Elasticsearch and then gets reindexed with new _content. Index operations will throw an
 * {@link org.springframework.dao.OptimisticLockingFailureException} if the seq_no + primary_term pair already has
 * different values for the given document. See Elasticsearch documentation for more information:
 * https://www.elastic.co/guide/en/elasticsearch/reference/current/optimistic-concurrency-control.html
 * </p>
 * <p>
 * A property of this type is implicitly @{@link org.springframework.data.annotation.Transient} and never gets included
 * into a mapping at Elasticsearch side.
 * </p>
 * <p>
 * A SeqNoPrimaryTerm instance cannot contain an invalid or unassigned seq_no or primary_term.
 * </p>
 * @author Roman Puchkovskiy
 * @since 4.0
public record SeqNoPrimaryTerm(long sequenceNumber, long primaryTerm) {
	 * Creates an instance of SeqNoPrimaryTerm with the given seq_no and primary_term. The passed values are validated:
	 * sequenceNumber must be non-negative, primaryTerm must be positive. If validation fails, an IllegalArgumentException
	 * is thrown.
	 * @param sequenceNumber seq_no, must not be negative
	 * @param primaryTerm primary_term, must be positive
	 * @throws IllegalArgumentException if seq_no or primary_term is not valid
	public SeqNoPrimaryTerm {
		if (sequenceNumber < 0) {
			throw new IllegalArgumentException("seq_no should not be negative, but it's " + sequenceNumber);
		if (primaryTerm <= 0) {
			throw new IllegalArgumentException("primary_term should be positive, but it's " + primaryTerm);


	public String toString() {
		return "SeqNoPrimaryTerm{" + "sequenceNumber=" + sequenceNumber + ", primaryTerm=" + primaryTerm + '}';


spring-data-elasticsearch 源码目录


spring-data-elasticsearch BaseQuery 源码

spring-data-elasticsearch BaseQueryBuilder 源码

spring-data-elasticsearch BulkOptions 源码

spring-data-elasticsearch ByQueryResponse 源码

spring-data-elasticsearch Criteria 源码

spring-data-elasticsearch CriteriaQuery 源码

spring-data-elasticsearch CriteriaQueryBuilder 源码

spring-data-elasticsearch FetchSourceFilter 源码

spring-data-elasticsearch FetchSourceFilterBuilder 源码

spring-data-elasticsearch Field 源码

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