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diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/DelayedWriteResultRequest.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/DelayedWriteResultRequest.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common.request;
+
+import org.simantics.db.AsyncRequestProcessor;
+import org.simantics.db.RequestProcessor;
+import org.simantics.db.VirtualGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.procedure.Procedure;
+import org.simantics.db.request.DelayedWriteResult;
+import org.simantics.db.request.UndoTraits;
+import org.simantics.db.request.WriteInterface;
+import org.simantics.db.request.WriteTraits;
+
+
+/**
+ * Usage samples:
+ * 
+ * <p>
+ * Synchronous read without checked exceptions:
+ * </p>
+ * <pre>
+ * Resource r = new SimpleReadGraphRequest&lt;Resource&gt;(session) {
+ *     {@code @Override}
+ *     public Resource run(Graph g) {
+ *         Resource r = doSomethingThatMayFail();
+ *         return r;
+ *     }
+ * }.sync();
+ * </pre>
+ * 
+ * <p>
+ * Synchronous read with a selected checked exception that may be thrown:
+ * </p>
+ * <pre>
+ * Resource r = new SimpleReadGraphRequest&lt;Resource&gt;(session) {
+ *     {@code @Override}
+ *     public Resource run(Graph g) throws CheckedException {
+ *         Resource r = doSomethingThatMayFailWithCheckedException();
+ *         return r;
+ *     }
+ * }.sync(CheckedException.class);
+ * </pre>
+ * 
+ * <p>
+ * Asynchronous read with a completed() method for examining the result:
+ * </p>
+ * <pre>
+ * Resource r = new SimpleReadGraphRequest&lt;Resource&gt;(session) {
+ *     {@code @Override}
+ *     public Resource run(Graph g) {
+ *         Resource r = doSomethingThatMayFail();
+ *         return r;
+ *     }
+ *     public void completed(Resource result) {
+ *         // quickly dispatch the result somewhere, do nothing serious in this code.
+ *     }
+ * }.async();
+ * </pre>
+ * 
+ * @param <T> the result type
+ */
+public abstract class DelayedWriteResultRequest<T> implements DelayedWriteResult<T>, WriteTraits, WriteInterface<T> {
+
+    private final VirtualGraph provider;
+
+    public DelayedWriteResultRequest() {
+        this.provider = null;
+    }
+
+    public DelayedWriteResultRequest(VirtualGraph provider) {
+        this.provider = provider;
+    }
+    
+    @Override
+    final public VirtualGraph getProvider() {
+        return provider;
+    }
+    
+    @Override
+    public UndoTraits getUndoTraits() {
+    	return null;
+    }
+
+    @Override
+    public void request(AsyncRequestProcessor processor, final Procedure<T> procedure) {
+    	processor.asyncRequest(this, procedure);
+    }
+    
+    @Override
+    public T request(RequestProcessor processor) throws DatabaseException {
+    	return processor.syncRequest(this);
+    }
+    
+}