What is hibernate search engine?

Hibernate Search is an extension to Hibernate ORM that adds powerful full-text query capabilities, with an API consistent with Hibernate and JPA. It is typically used to implement “full-text search”, such as matching free text input provided by humans.

How does Hibernate Search work?

Hibernate Search uses the Lucene index to search an entity and return a list of managed entities saving you the tedious object to Lucene document mapping. The same persistence context is shared between Hibernate and Hibernate Search. As a matter of fact, the FullTextSession is built on top of the Hibernate Session.

Why use Hibernate Search?

Hibernate Search provides integration with Lucene and Elasticsearch which are highly optimized for full-text search. While Lucene and Elasticsearch handle searches, Hibernate Search provides seamless integration between them and Hibernate.

What is Hibernate Search ORM?

Hibernate Search automatically extracts data from Hibernate ORM entities to push it to local Apache Lucene indexes or remote Elasticsearch/OpenSearch indexes. It features: Declarative mapping of entity properties to index fields, either through annotations or a programmatic API.

What is Lucene Elasticsearch?

Lucene or Apache Lucene is an open-source Java library used as a search engine. Elasticsearch is built on top of Lucene. Elasticsearch converts Lucene into a distributed system/search engine for scaling horizontally.

What is the difference between SQL and HQL?

Differences between SQL and HQL: SQL is based on a relational database model whereas HQL is a combination of object-oriented programming with relational database concepts. SQL manipulates data stored in tables and modifies its rows and columns. HQL is concerned about objects and its properties.

What is hibernate indexing?

Indexing. The short answer is that indexing is automatic: Hibernate Search will transparently index every entity each time it’s persisted, updated or removed through Hibernate ORM. Its mission is to keep the index and your database in sync, allowing you to forget about this problem.

What is difference between Elasticsearch and Lucene?

Does Hibernate use index?

As the others already mentioned: Hibernated doesn’t decide to use or not use an index. Your database does.

What is JpaSpecificationExecutor?

The JpaSpecificationExecutor interface declares the methods that can be used to invoke database queries that use the JPA Criteria API. This interface has one type parameter T that describes the type of the queried entity.

What is QueryDslPredicateExecutor?

The QueryDslPredicateExecutor interface declares the methods that can be used to invoke database queries that use Querydsl. This interface has one type parameter T that describes the type of the queried entity.