Using Hibernate Search 6 - How to prevent automatic indexing for a specific entity?-CodePudding

We would like to handle the indexing ourselves for one of our Hibernate Search entities.

Is it possible to disable auto indexing within Hibernate Search 6 for a specific entity? Similar to the older Hibernate Search global setting: hibernate.search.indexing_strategy = manual

I've searched through the documentation but haven't seen this mentioned.

CodePudding user response：

hibernate.search.indexing_strategy = manual was for all entity types, not for a specific one.

The feature you're looking for has already been filed as HSEARCH-168, and is currently planned for Hibernate Search 6.2.

In the meantime, I think the best you can do would be to rely on a hack. It won't be as efficient as what we envision for HSEARCH-168, but it's a start:

Implement a RoutingBridge which, based on a switch, will either disable indexing completely (both adding and removing the entity from the index) or behave normally as if there was no routing bridge:

public class ManualIndexingRoutingBinder implements RoutingBinder {

    private static volatile boolean indexingEnabled = false;

    public static synchronized void withIndexingEnabled(Runnable runnable) {
        indexingEnabled = true;
        try {
            runnable.run();
        }
        finally {
            indexingEnabled = false;
        }
    }

    @Override
    public void bind(RoutingBindingContext context) { 
        context.dependencies() 
                .useRootOnly();

        context.bridge( 
                Book.class, 
                new Bridge() 
        );
    }

    public static class Bridge implements RoutingBridge<Book> { 
        @Override
        public void route(DocumentRoutes routes, Object entityIdentifier, Book indexedEntity, 
                RoutingBridgeRouteContext context) {
            if ( indexingEnabled ) { 
                routes.addRoute();
            }
            else {
                routes.notIndexed(); 
            }
        }

        @Override
        public void previousRoutes(DocumentRoutes routes, Object entityIdentifier, Book indexedEntity, 
                RoutingBridgeRouteContext context) {
            if ( indexingEnabled ) {
                // So that Hibernate Search will correctly delete entities if necessary.
                // Only useful if you use SearchIndexingPlan for manual indexing,
                // as the MassIndexer never deletes documents.
                routes.addRoute();
            }
            else {
                routes.notIndexed(); 
            }
        }
    }
}

Apply that routing bridge to the entity types you want to control:

@Entity
@Indexed(routingBinder = @RoutingBinderRef(type = ManualIndexingRoutingBinder.class))
public class Book {
    // ...
}

The routing bridge will effectively disable automatic indexing.

To index manually, do this:

ManualIndexingRoutingBinder.withIndexingEnabled(() -> {
    Search.mapping(entityManagerFactory).scope(Book.class)
            .massIndexer()
            .startAndWait();
});

I didn't test this exactly, so please report back, but in principle this should work.