1 files changed, 53 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/cdo/transaction/CDOAutoLocker.java b/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/cdo/transaction/CDOAutoLocker.java
new file mode 100644
index 0000000000..bfe53db970
--- /dev/null
+++ b/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/cdo/transaction/CDOAutoLocker.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2013 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.cdo.transaction;
+
+import org.eclipse.emf.cdo.CDOObject;
+import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta;
+
+import org.eclipse.net4j.util.WrappedException;
+
+import java.util.concurrent.TimeoutException;
+
+/**
+ * A {@link CDOTransactionHandler1 transaction handler} that automatically acquires {@link CDOObject#cdoWriteLock() write locks} when
+ * {@link CDOObject objects} are modified.
+ *
+ * @author Eike Stepper
+ * @since 4.2
+ */
+public class CDOAutoLocker extends CDODefaultTransactionHandler1
+{
+  private long timeout;
+
+  public CDOAutoLocker(long timeout)
+  {
+    this.timeout = timeout;
+  }
+
+  public CDOAutoLocker()
+  {
+    this(10000);
+  }
+
+  @Override
+  public void modifyingObject(CDOTransaction transaction, CDOObject object, CDOFeatureDelta featureChange)
+  {
+    try
+    {
+      object.cdoWriteLock().lock(timeout);
+    }
+    catch (TimeoutException ex)
+    {
+      throw WrappedException.wrap(ex);
+    }
+  }
+}