Package org.apache.jackrabbit.oak.spi.commit

Class EmptyObserver

  • All Implemented Interfaces:
    Observer
    public class EmptyObserver
extends java.lang.Object
implements Observer
    Basic content change observer that doesn't do anything. Useful as a "null object" for cases where another observer has not been configured, thus avoiding an extra null check when invoking the observer.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static EmptyObserver INSTANCE
      Static instance of this class, useful as a "null object".

    • Constructor Summary

      Constructors 
      Constructor Description
      EmptyObserver()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void contentChanged​(@NotNull NodeState root, @NotNull CommitInfo info)
      Observes a content change.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • INSTANCE

        public static final EmptyObserver INSTANCE
        Static instance of this class, useful as a "null object".

    • Constructor Detail

      • EmptyObserver

        public EmptyObserver()

    • Method Detail

      • contentChanged

        public void contentChanged​(@NotNull
                           @NotNull NodeState root,
                           @NotNull
                           @NotNull CommitInfo info)
        Description copied from interface: Observer
        Observes a content change. See the Observer class javadocs and relevant repository and observer registration details for more information on when and how this method gets called.
        Specified by:
        contentChanged in interface Observer
        Parameters:
        root - root state of the repository
        info - commit information