Define efficient serialization proxies

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / persisted / SM.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/SM.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/SM.java
new file mode 100644 (file)
index 0000000..1e2cdc8
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+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/SM.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2022 PANTHEON.tech, s.r.o. 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.datastore.persisted;
+
+import static com.google.common.base.Verify.verifyNotNull;
+import static java.util.Objects.requireNonNull;
+
+import java.util.List;
+
+/**
+ * Serialization proxy for {@link ShardManagerSnapshot}.
+ */
+final class SM implements ShardManagerSnapshot.SerializedForm {
+    private static final long serialVersionUID = 1L;
+
+    private ShardManagerSnapshot snapshot;
+
+    @SuppressWarnings("checkstyle:RedundantModifier")
+    public SM() {
+        // For Externalizable
+    }
+
+    SM(final ShardManagerSnapshot snapshot) {
+        this.snapshot = requireNonNull(snapshot);
+    }
+
+    @Override
+    public List<String> shardNames() {
+        return snapshot.getShardList();
+    }
+
+    @Override
+    public void resolveTo(final ShardManagerSnapshot newSnapshot) {
+        snapshot = requireNonNull(newSnapshot);
+    }
+
+    @Override
+    public Object readResolve() {
+        return verifyNotNull(snapshot);
+    }
+
+}