Package org.hibernate.reactive.event.impl

Class DefaultReactiveLoadEventListener

  • All Implemented Interfaces:
    java.io.Serializable, org.hibernate.event.spi.LoadEventListener, ReactiveLoadEventListener
    public class DefaultReactiveLoadEventListener
extends java.lang.Object
implements org.hibernate.event.spi.LoadEventListener, ReactiveLoadEventListener
    A reactive DefaultLoadEventListener.

    Note that sometimes Hibernate ORM calls SessionImpl.internalLoad(String, Object, boolean, boolean) and onLoad(LoadEvent, LoadType) is called. We only support this case when loading generates a proxy.

    The return value of the private methods loading the entity is a proxy or a CompletionStage. The CompletionStage only happens when we query the db and a proxy is not created. If onLoad(LoadEvent, LoadType) is called, we cannot get the entity loaded from the db without blocking the request and therefore we aren't going to support this case for now.

    See Also:
    Serialized Form

    • Nested Class Summary

      • Nested classes/interfaces inherited from interface org.hibernate.event.spi.LoadEventListener

        org.hibernate.event.spi.LoadEventListener.LoadType

    • Field Summary

      • Fields inherited from interface org.hibernate.event.spi.LoadEventListener

        GET, IMMEDIATE_LOAD, INTERNAL_LOAD_EAGER, INTERNAL_LOAD_LAZY, INTERNAL_LOAD_NULLABLE, LOAD, RELOAD

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected org.hibernate.persister.entity.EntityPersister getPersister​(org.hibernate.event.spi.LoadEvent event)  
      protected java.util.concurrent.CompletionStage<java.lang.Object> loadFromDatasource​(org.hibernate.event.spi.LoadEvent event, org.hibernate.persister.entity.EntityPersister persister)
      Performs the process of loading an entity from the configured underlying datasource.
      void onLoad​(org.hibernate.event.spi.LoadEvent event, org.hibernate.event.spi.LoadEventListener.LoadType loadType)
      This method is not reactive, but we expect it to be called only when a proxy can be returned.
      java.util.concurrent.CompletionStage<java.lang.Void> reactiveOnLoad​(org.hibernate.event.spi.LoadEvent event, org.hibernate.event.spi.LoadEventListener.LoadType loadType)
      Handle the given load event.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • DefaultReactiveLoadEventListener

        public DefaultReactiveLoadEventListener()

    • Method Detail

      • onLoad

        public void onLoad​(org.hibernate.event.spi.LoadEvent event,
                   org.hibernate.event.spi.LoadEventListener.LoadType loadType)
            throws org.hibernate.HibernateException
        This method is not reactive, but we expect it to be called only when a proxy can be returned.

        In particular, it should be called only by SessionImpl.internalLoad(String, Object, boolean, boolean).

        Specified by:
        onLoad in interface org.hibernate.event.spi.LoadEventListener
        Throws:
        java.lang.UnsupportedOperationException - if the entity loaded is not a proxy
        UnexpectedAccessToTheDatabase - if it needs to load the entity from the db
        org.hibernate.HibernateException
        See Also:
        DefaultLoadEventListener.onLoad(LoadEvent, LoadType)

      • reactiveOnLoad

        public java.util.concurrent.CompletionStage<java.lang.Void> reactiveOnLoad​(org.hibernate.event.spi.LoadEvent event,
                                                                           org.hibernate.event.spi.LoadEventListener.LoadType loadType)
                                                                    throws org.hibernate.HibernateException
        Handle the given load event.
        Specified by:
        reactiveOnLoad in interface ReactiveLoadEventListener
        Parameters:
        event - The load event to be handled.
        Throws:
        org.hibernate.HibernateException

      • getPersister

        protected org.hibernate.persister.entity.EntityPersister getPersister​(org.hibernate.event.spi.LoadEvent event)

      • loadFromDatasource

        protected java.util.concurrent.CompletionStage<java.lang.Object> loadFromDatasource​(org.hibernate.event.spi.LoadEvent event,
                                                                                    org.hibernate.persister.entity.EntityPersister persister)
        Performs the process of loading an entity from the configured underlying datasource.
        Parameters:
        event - The load event
        persister - The persister for the entity being requested for load
        Returns:
        The object loaded from the datasource, or null if not found.