Hibernate Search is a community driven project and as such the roadmap constantly evolves to reflect the users needs.
You can find a finer grained roadmap in our issue tracker but this page is a good and concise view of where we are going.
Dates are generally omitted: milestones are released regularly, the Final release is tagged when it’s considered stable.
Hibernate Search 6.1
For a full list of issues currently planned for this series, see here.
- Restore the WildFly integration
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The WildFly integration was removed in 6.0 to reduce the work load. We will restore it in 6.1.
- First-class support for clustered applications
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Hibernate Search 6.0 only allows single-node applications, or multi-node applications where each node works independently, simply sending events to an Elasticsearch cluster.
This does not account for several challenges that we will address in 6.1:
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When each node sends updates to Elasticsearch independently, conflicts may arise when entities are updated simultaneously on different nodes. There is a need to prevent, or at least resolve, these conflicts. See HSEARCH-3280.
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For some use cases where maintenance downtime is not acceptable, Hibernate Search needs to provide hot updates at the cluster level: allow booting application nodes with the new mapping, while some application nodes with the old mapping are still running. See HSEARCH-3499.
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Hibernate Search 6.2
For a full list of issues currently planned for this series, see here.
- Search query features
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Add more features to the Hibernate Search DSL. In particular:
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HSEARCH-2192 Highlighting in the Search API
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HSEARCH-917 Add match all terms option when matching in the DSL API
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HSEARCH-3327 Add options for match predicates targeting multiple fields
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HSEARCH-3926 Predicate on multiple fields designated by a single label/group name/etc. ("_all", copy_to, …)
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HSEARCH-3927 Projection to a DTO/JavaBean/etc.
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HSEARCH-3943 Projection nesting: preserving the document structure in projections
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- Reactive Search
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Experiment with integrating Hibernate Search with Hibernate Reactive.
See also HSEARCH-3322, HSEARCH-3471.
- Hibernate Search for arbitrary data sources
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Experimental module allowing integration with a datastore that is not accessed using Hibernate ORM.
Users will need to put in more work to configure it, in particular they will need to capture insert/update/delete events themselves.
Nevertheless, this could be useful for people looking to add full-text search to any application, not just applications relying on Hibernate ORM.
See also HSEARCH-1800.
Hibernate Search 6.3
For a full list of issues currently planned for this series, see here.
- More advanced mapping
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Allow more complex setups when it comes to mapping entities to indexes. In particular:
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HSEARCH-3971 Mapping an entity differently based on a discriminator
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HSEARCH-3683 Mapping a single entity type to multiple indexes
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HSEARCH-3903 Filters based exclusively on mapper metadata for @IndexedEmbedded
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- Some specialized field types
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Add commonly used field types. In particular:
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Fields derived from large blobs, useful when indexing PDFs with Apache Tika for example.
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Maybe more, depending on demand, e.g. HSEARCH-3488 Add support for nanosecond precision for temporal fields.
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- Tracing
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Tracing of search queries and indexing requests to enable easier debugging and performance investigation.
See HSEARCH-4057.
Hibernate Search 6.x or later
- Restore the OSGi integration
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The OSGi integration was removed in 6.0 to reduce the work load. We will restore it in 6.1 if there is demand for it. Vote here.
- Free-form indexing
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We’re planning to decouple the metadata definition from annotated java classes, to allow better indexing of other more flexible sources; for example to make it easier to index data structured in the JSON format, or other formats whose schema is not known at compile time.
- Debezium integration
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Asynchronous indexing driven by Change Data Capture in the database instead of Hibernate ORM events.
This would allow capturing changes caused by any SQL command, not just those issued by Hibernate ORM.
See HSEARCH-3513.
