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diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ShardedDOMStoreTransactionChain.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ShardedDOMStoreTransactionChain.java
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+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ShardedDOMStoreTransactionChain.java
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+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. 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
+ */
+package org.opendaylight.controller.cluster.databroker;
+
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.cluster.databroker.actors.dds.ClientLocalHistory;
+import org.opendaylight.controller.cluster.databroker.actors.dds.ClientTransaction;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
+
+/**
+ * Implementation of {@link DOMStoreTransactionChain} backed by a {@link ClientLocalHistory}. It wraps
+ * {@link ClientTransaction} into proxies like {@link ShardedDOMStoreReadTransaction} to provide isolation.
+ *
+ * @author Robert Varga
+ */
+final class ShardedDOMStoreTransactionChain implements DOMStoreTransactionChain {
+    private final ClientLocalHistory history;
+
+    ShardedDOMStoreTransactionChain(final ClientLocalHistory history) {
+        this.history = Preconditions.checkNotNull(history);
+    }
+
+    @Override
+    public DOMStoreReadTransaction newReadOnlyTransaction() {
+        return new ShardedDOMStoreReadTransaction(history.createTransaction());
+    }
+
+    @Override
+    public DOMStoreReadWriteTransaction newReadWriteTransaction() {
+        return new ShardedDOMStoreReadWriteTransaction(history.createTransaction());
+    }
+
+    @Override
+    public DOMStoreWriteTransaction newWriteOnlyTransaction() {
+        return new ShardedDOMStoreWriteTransaction(history.createTransaction());
+    }
+
+    @Override
+    public void close() {
+        history.close();
+    }
+}