+/*
+ * 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.access.concepts;
+
+import java.io.Externalizable;
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+import org.opendaylight.yangtools.concepts.WritableObjects;
+
+abstract class AbstractEnvelopeProxy<T extends Message<?, ?>> implements Externalizable {
+ private static final long serialVersionUID = 1L;
+ private T message;
+ private long sequence;
+ private long retry;
+
+ public AbstractEnvelopeProxy() {
+ // for Externalizable
+ }
+
+ AbstractEnvelopeProxy(final Envelope<T> envelope) {
+ message = envelope.getMessage();
+ sequence = envelope.getSequence();
+ retry = envelope.getRetry();
+ }
+
+ @Override
+ public final void writeExternal(final ObjectOutput out) throws IOException {
+ WritableObjects.writeLongs(out, sequence, retry);
+ out.writeObject(message);
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public final void readExternal(final ObjectInput in) throws IOException, ClassNotFoundException {
+ final byte header = WritableObjects.readLongHeader(in);
+ sequence = WritableObjects.readFirstLong(in, header);
+ retry = WritableObjects.readSecondLong(in, header);
+ message = (T) in.readObject();
+ }
+
+ abstract Envelope<T> createEnvelope(T message, long sequence, long retry);
+
+ final Object readResolve() {
+ return createEnvelope(message, sequence, retry);
+ }
+}
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