--- /dev/null
+/*
+ * Copyright (c) 2014 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.md.sal.dom.broker.impl;
+
+import com.google.common.base.Preconditions;
+import javax.annotation.Nonnull;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
+import org.opendaylight.controller.md.sal.dom.spi.ForwardingDOMDataBroker;
+
+/**
+ * An implementation of a {@link DOMDataBroker}, which forwards most requests to a delegate.
+ *
+ * Its interpretation of the API contract is somewhat looser, specifically it does not
+ * guarantee transaction ordering between transactions allocated directly from the broker
+ * and its transaction chains.
+ */
+public final class PingPongDataBroker extends ForwardingDOMDataBroker implements AutoCloseable {
+ private final DOMDataBroker delegate;
+
+ /**
+ * Instantiate a new broker, backed by the the specified delegate
+ * {@link DOMDataBroker}.
+ *
+ * @param delegate Backend broker, may not be null.
+ */
+ public PingPongDataBroker(final @Nonnull DOMDataBroker delegate) {
+ this.delegate = Preconditions.checkNotNull(delegate);
+ }
+
+ @Override
+ protected DOMDataBroker delegate() {
+ return delegate;
+ }
+
+ @Override
+ public PingPongTransactionChain createTransactionChain(final TransactionChainListener listener) {
+ return new PingPongTransactionChain(delegate, listener);
+ }
+
+ @Override
+ public void close() {
+ // TODO Auto-generated method stub
+ }
+}