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diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/procedure/ResultCallWrappedSingleQueryProcedure45.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/procedure/ResultCallWrappedSingleQueryProcedure45.java
new file mode 100644
index 000000000..d5abda66e
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/procedure/ResultCallWrappedSingleQueryProcedure45.java
@@ -0,0 +1,78 @@
+/*******************************************************************************
+ * 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.impl.procedure;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.db.impl.query.QueryProcessor.AsyncBarrier;
+import org.simantics.db.procedure.AsyncProcedure;
+import org.simantics.db.procedure.Procedure;
+
+public class ResultCallWrappedSingleQueryProcedure45<Result> implements AsyncProcedure<Result> {
+
+    private Result result = null;
+    private Throwable exception = null;
+    final private Procedure<Result> procedure;
+    final private AsyncBarrier barrier;
+    final private AtomicBoolean latch;
+    
+    public ResultCallWrappedSingleQueryProcedure45(Procedure<Result> procedure, AsyncBarrier barrier) {
+    	assert(procedure != null);
+        this.procedure = procedure;
+        this.barrier = barrier;
+        latch = new AtomicBoolean(false);
+    }
+    
+    @Override
+    public void execute(AsyncReadGraph graph, Result result) {
+        this.result = result;
+        if(latch.compareAndSet(false, true)) {
+        	try {
+        		procedure.execute(result);
+        	} catch (Throwable throwable) {
+            	Logger.defaultLogError("AsyncProcedure.execute threw for " + procedure, throwable);
+        	} finally {
+        		barrier.dec();
+        	}
+        } else {
+        	Logger.defaultLogError("Procedure was called many times (this time is execute)");
+        }
+    }
+
+    @Override
+    public void exception(AsyncReadGraph graph, Throwable t) {
+        this.exception = t;
+        if(latch.compareAndSet(false, true)) {
+        	try {
+        		procedure.exception(t);
+        	} catch (Throwable throwable) {
+            	Logger.defaultLogError("AsyncProcedure.exception threw for " + procedure, throwable);
+        	} finally {
+        		barrier.dec();
+        	}
+        } else {
+        	Logger.defaultLogError("Procedure was called many times (this time is exception)");
+        }
+        
+    }
+    
+    public Result getResult() {
+        return result;
+    }
+    
+    public Throwable getException() {
+        return exception;
+    }
+	
+}