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diff --git a/org.simantics.g3d/src/org/simantics/proconf/g3d/actions/ReadAction.java b/org.simantics.g3d/src/org/simantics/proconf/g3d/actions/ReadAction.java
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+++ b/org.simantics.g3d/src/org/simantics/proconf/g3d/actions/ReadAction.java
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+/*******************************************************************************
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.
+ * 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.proconf.g3d.actions;
+
+import org.simantics.db.Graph;
+import org.simantics.db.GraphRequest;
+import org.simantics.db.GraphRequestAdapter;
+import org.simantics.db.GraphRequestStatus;
+import org.simantics.db.Session;
+import org.simantics.proconf.g3d.base.ThreeDimensionalEditorBase;
+
+public abstract class ReadAction extends ContextAction {
+	boolean sync;
+	public ReadAction(ThreeDimensionalEditorBase parent, boolean sync) {
+		super(parent);
+		this.sync = sync;
+	}
+
+	@Override
+	public final void run() {
+		Session session = parent.getSession();
+		if(!canActivate()) {
+			return;
+		}
+		GraphRequest r = new GraphRequestAdapter() {
+			@Override
+			public GraphRequestStatus perform(Graph g) throws Exception {
+				doChanges(g);
+				return GraphRequestStatus.transactionComplete();
+			}
+		};
+		if (sync) {
+			session.syncRead(r);
+		} else {
+			session.asyncRead(r);
+		} 
+	}
+	
+	public abstract void doChanges(Graph graph) throws Exception;
+
+	public boolean canActivate() {
+		return true;
+	}
+}