Bug 4564: Implement datastore restore from backup file

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / test / java / org / opendaylight / controller / cluster / datastore / DatastoreSnapshotRestoreTest.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/DatastoreSnapshotRestoreTest.java b/opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/DatastoreSnapshotRestoreTest.java
new file mode 100644 (file)
index 0000000..aa67e53
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/DatastoreSnapshotRestoreTest.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2015 Brocade Communications 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.datastore;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import org.apache.commons.lang3.SerializationUtils;
+import org.junit.After;
+import org.junit.Test;
+import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
+import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot.ShardSnapshot;
+import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshotList;
+
+/**
+ * Unit tests for DatastoreSnapshotRestore.
+ *
+ * @author Thomas Pantelis
+ */
+public class DatastoreSnapshotRestoreTest {
+    String restoreDirectoryPath = "target/DatastoreSnapshotRestoreTest-" + System.nanoTime();
+    File restoreDirectoryFile = new File(restoreDirectoryPath);
+    File backupFile = new File(restoreDirectoryFile, "backup");
+
+    @After
+    public void tearDown() {
+        backupFile.delete();
+        restoreDirectoryFile.delete();
+    }
+
+    @Test
+    public void test() throws Exception {
+        assertTrue("Failed to mkdir " + restoreDirectoryPath, restoreDirectoryFile.mkdirs());
+
+        List<ShardSnapshot> shardSnapshots = new ArrayList<>();
+        shardSnapshots.add(new ShardSnapshot("cars", new byte[]{1,2}));
+        shardSnapshots.add(new ShardSnapshot("people", new byte[]{3,4}));
+        DatastoreSnapshot configSnapshot = new DatastoreSnapshot("config", null, shardSnapshots );
+
+        shardSnapshots = new ArrayList<>();
+        shardSnapshots.add(new ShardSnapshot("cars", new byte[]{5,6}));
+        shardSnapshots.add(new ShardSnapshot("people", new byte[]{7,8}));
+        shardSnapshots.add(new ShardSnapshot("bikes", new byte[]{9,0}));
+        DatastoreSnapshot operSnapshot = new DatastoreSnapshot("oper", null, shardSnapshots );
+
+        DatastoreSnapshotList snapshotList = new DatastoreSnapshotList();
+        snapshotList.add(configSnapshot);
+        snapshotList.add(operSnapshot);
+
+        File backupFile = new File(restoreDirectoryFile, "backup");
+        try(FileOutputStream fos = new FileOutputStream(backupFile)) {
+            SerializationUtils.serialize(snapshotList, fos);
+        }
+
+        DatastoreSnapshotRestore.createInstance(restoreDirectoryPath);
+
+        verifySnapshot(configSnapshot, DatastoreSnapshotRestore.instance().getAndRemove("config"));
+        verifySnapshot(operSnapshot, DatastoreSnapshotRestore.instance().getAndRemove("oper"));
+
+        assertNull("DatastoreSnapshot was not removed", DatastoreSnapshotRestore.instance().getAndRemove("config"));
+
+        assertFalse(backupFile + " was not deleted", backupFile.exists());
+
+        DatastoreSnapshotRestore.removeInstance();
+        DatastoreSnapshotRestore.createInstance("target/does-not-exist");
+        assertNull("Expected null DatastoreSnapshot", DatastoreSnapshotRestore.instance().getAndRemove("config"));
+        assertNull("Expected null DatastoreSnapshot", DatastoreSnapshotRestore.instance().getAndRemove("oper"));
+    }
+
+    private void verifySnapshot(DatastoreSnapshot expected, DatastoreSnapshot actual) {
+        assertNotNull("DatastoreSnapshot is null", actual);
+        assertEquals("getType", expected.getType(), actual.getType());
+        assertTrue("ShardManager snapshots don't match", Objects.deepEquals(expected.getShardManagerSnapshot(),
+                actual.getShardManagerSnapshot()));
+        assertEquals("ShardSnapshots size", expected.getShardSnapshots().size(), actual.getShardSnapshots().size());
+        for(int i = 0; i < expected.getShardSnapshots().size(); i++) {
+            assertEquals("ShardSnapshot " + (i + 1) + " name", expected.getShardSnapshots().get(i).getName(),
+                    actual.getShardSnapshots().get(i).getName());
+            assertArrayEquals("ShardSnapshot " + (i + 1) + " snapshot", expected.getShardSnapshots().get(i).getSnapshot(),
+                    actual.getShardSnapshots().get(i).getSnapshot());
+        }
+    }
+}