1 files changed, 41 insertions, 1 deletions
diff --git a/plugins/org.eclipse.net4j/src/org/eclipse/net4j/buffer/IBufferProvider.java b/plugins/org.eclipse.net4j/src/org/eclipse/net4j/buffer/IBufferProvider.java
index 2c2c0565ec..07875eec8c 100644
--- a/plugins/org.eclipse.net4j/src/org/eclipse/net4j/buffer/IBufferProvider.java
+++ b/plugins/org.eclipse.net4j/src/org/eclipse/net4j/buffer/IBufferProvider.java
@@ -10,6 +10,9 @@
  */
 package org.eclipse.net4j.buffer;
 
+import org.eclipse.net4j.util.event.IEvent;
+import org.eclipse.net4j.util.event.INotifier;
+
 /**
  * Provides clients with the ability to obtain and retain {@link IBuffer}s.
  *
@@ -33,7 +36,7 @@ public interface IBufferProvider
   public void retainBuffer(IBuffer buffer);
 
   /**
-   * Offers additional introspection features for {@link IBufferProvider}s.
+   * Offers additional introspection features for {@link IBufferProvider buffer providers}.
    *
    * @author Eike Stepper
    */
@@ -49,4 +52,41 @@ public interface IBufferProvider
      */
     public long getRetainedBuffers();
   }
+
+  /**
+   * Offers additional notification features for {@link IBufferProvider buffer providers}.
+   *
+   * @author Eike Stepper
+   * @since 4.6
+   */
+  public interface Notification extends IBufferProvider, INotifier
+  {
+    /**
+     * An {@link IEvent event} fired from a {@link IBufferProvider buffer provider} to indicate that a buffer has been provided.
+     *
+     * @author Eike Stepper
+     * @noextend This interface is not intended to be extended by clients.
+     * @noimplement This interface is not intended to be implemented by clients.
+     */
+    public interface BufferProvidedEvent extends IEvent
+    {
+      public IBufferProvider.Notification getSource();
+
+      public IBuffer getBuffer();
+    }
+
+    /**
+     * An {@link IEvent event} fired from a {@link IBufferProvider buffer provider} to indicate that a buffer is about to be retained.
+     *
+     * @author Eike Stepper
+     * @noextend This interface is not intended to be extended by clients.
+     * @noimplement This interface is not intended to be implemented by clients.
+     */
+    public interface BufferRetainingEvent extends IEvent
+    {
+      public IBufferProvider.Notification getSource();
+
+      public IBuffer getBuffer();
+    }
+  }
 }