1 files changed, 93 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/CDOSessionInvalidationEventQueue.java b/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/CDOSessionInvalidationEventQueue.java
new file mode 100644
index 0000000000..2690bd9c64
--- /dev/null
+++ b/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/CDOSessionInvalidationEventQueue.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Eike Stepper - initial API and implementation
+ */
+package org.eclipse.emf.spi.cdo;
+
+import org.eclipse.emf.cdo.common.commit.CDOChangeSetData;
+import org.eclipse.emf.cdo.session.CDOSession;
+import org.eclipse.emf.cdo.session.CDOSessionInvalidationEvent;
+
+import org.eclipse.emf.internal.cdo.bundle.OM;
+
+import org.eclipse.net4j.util.event.IEvent;
+import org.eclipse.net4j.util.event.IListener;
+
+import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+/**
+ * If the meaning of this type isn't clear, there really should be more of a description here...
+ *
+ * @author Eike Stepper
+ * @since 4.2
+ * @noextend This interface is not intended to be extended by clients.
+ * @noinstantiate This class is not intended to be instantiated by clients.
+ */
+public class CDOSessionInvalidationEventQueue
+{
+  private CDOSession session;
+
+  private IListener sessionListener = new IListener()
+  {
+    public void notifyEvent(IEvent event)
+    {
+      try
+      {
+        if (event instanceof CDOSessionInvalidationEvent)
+        {
+          CDOSessionInvalidationEvent e = (CDOSessionInvalidationEvent)event;
+          handleEvent(e);
+        }
+      }
+      catch (Exception ex)
+      {
+        OM.LOG.error(ex);
+      }
+    }
+  };
+
+  private Queue<CDOChangeSetData> queue = new ConcurrentLinkedQueue<CDOChangeSetData>();
+
+  public CDOSessionInvalidationEventQueue(CDOSession session)
+  {
+    this.session = session;
+    session.addListener(sessionListener);
+  }
+
+  public void dispose()
+  {
+    reset();
+    session.removeListener(sessionListener);
+    session = null;
+  }
+
+  public CDOSession getSession()
+  {
+    return session;
+  }
+
+  /**
+   * Removes and returns the first event from this queue.
+   */
+  public CDOChangeSetData getChangeSetData()
+  {
+    return queue.poll();
+  }
+
+  public void reset()
+  {
+    queue.clear();
+  }
+
+  protected void handleEvent(CDOSessionInvalidationEvent event) throws Exception
+  {
+    queue.offer(event);
+  }
+}