DatabaseService that uses Copycat Raft to provide a strongly consistent and durable database.
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/VersionedValue.java b/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/VersionedValue.java
new file mode 100644
index 0000000..31bdcc2
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/VersionedValue.java
@@ -0,0 +1,44 @@
+package org.onlab.onos.store.service.impl;
+
+import java.util.Arrays;
+
+/**
+ * Wrapper object that holds the object (as byte array) and its version.
+ */
+public class VersionedValue {
+
+ private final byte[] value;
+ private final long version;
+
+ /**
+ * Creates a new instance with the specified value and version.
+ * @param value
+ * @param version
+ */
+ public VersionedValue(byte[] value, long version) {
+ this.value = value;
+ this.version = version;
+ }
+
+ /**
+ * Returns the value.
+ * @return value.
+ */
+ public byte[] value() {
+ return value;
+ }
+
+ /**
+ * Returns the version.
+ * @return version.
+ */
+ public long version() {
+ return version;
+ }
+
+ @Override
+ public String toString() {
+ return "VersionedValue [value=" + Arrays.toString(value) + ", version="
+ + version + "]";
+ }
+}