Package org.apache.wayang.core.util

Class AbstractReferenceCountable

java.lang.Object
org.apache.wayang.core.util.AbstractReferenceCountable
All Implemented Interfaces:
ReferenceCountable
Direct Known Subclasses:
ExecutionResourceTemplate, ExecutorTemplate
public abstract class AbstractReferenceCountable extends Object implements ReferenceCountable
Implements a template for ReferenceCountable objects.

  • Constructor Details

    • AbstractReferenceCountable

      public AbstractReferenceCountable()

  • Method Details

    • disposeIfUnreferenced

      public boolean disposeIfUnreferenced()
      Description copied from interface: ReferenceCountable
      Dispose this instance if there are no more references to it.
      Specified by:
      disposeIfUnreferenced in interface ReferenceCountable
      Returns:
      whether this instance is not referenced any more

    • disposeUnreferenced

      protected abstract void disposeUnreferenced()
      Dispose this instance, which is not referenced anymore. This method should always be invoked through disposeUnreferenced()

    • getNumReferences

      public int getNumReferences()
      Description copied from interface: ReferenceCountable
      Tells the number of references on this instance.
      Specified by:
      getNumReferences in interface ReferenceCountable
      Returns:
      the number of references

    • noteObtainedReference

      public void noteObtainedReference()
      Description copied from interface: ReferenceCountable
      Declare that there is a new reference obtained on this instance.
      Specified by:
      noteObtainedReference in interface ReferenceCountable

    • noteDiscardedReference

      public void noteDiscardedReference(boolean isDisposeIfUnreferenced)
      Description copied from interface: ReferenceCountable
      Declare that a reference on this instance has been discarded. Optionally, dispose this instance if there are no remaining references.
      Specified by:
      noteDiscardedReference in interface ReferenceCountable
      Parameters:
      isDisposeIfUnreferenced - whether to dispose this instance if there are no more references

    • isDisposed

      public boolean isDisposed()
      Description copied from interface: ReferenceCountable
      Optional operation. Tell whether this instance has been disposed.
      Specified by:
      isDisposed in interface ReferenceCountable
      Returns:
      whether this instance has been disposed