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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.zookeeper.server;
import static org.apache.zookeeper.server.persistence.FileSnap.SNAPSHOT_FILE_PREFIX;
import static org.apache.zookeeper.test.ClientBase.CONNECTION_TIMEOUT;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.File;
import java.util.Set;
import java.util.zip.CheckedInputStream;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.PortAssignment;
import org.apache.zookeeper.ZKTestCase;
import org.apache.zookeeper.ZooDefs;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.server.persistence.SnapStream;
import org.apache.zookeeper.server.persistence.Util;
import org.apache.zookeeper.test.ClientBase;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
public class ZookeeperServerRestoreTest extends ZKTestCase {
private static final String BASE_PATH = "/restoreFromSnapshotTest";
private static final int NODE_COUNT = 10;
private static final String HOST_PORT = "127.0.0.1:" + PortAssignment.unique();
@TempDir
static File dataDir;
@TempDir
static File logDir;
@Test
public void testRestoreFromSnapshot() throws Exception {
ZooKeeperServer.setSerializeLastProcessedZxidEnabled(true);
final ZooKeeperServer zks = new ZooKeeperServer(dataDir, logDir, 3000);
final int port = Integer.parseInt(HOST_PORT.split(":")[1]);
final ServerCnxnFactory serverCnxnFactory = ServerCnxnFactory.createFactory(port, -1);
ZooKeeper zk1 = null;
ZooKeeper zk2 = null;
ZooKeeper zk3 = null;
try {
// start the server
serverCnxnFactory.startup(zks);
assertTrue(ClientBase.waitForServerUp(HOST_PORT, CONNECTION_TIMEOUT));
// zk1 create test data
zk1 = ClientBase.createZKClient(HOST_PORT);
for (int i = 0; i < NODE_COUNT; i++) {
final String path = BASE_PATH + "-" + i;
zk1.create(path, String.valueOf(i).getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
}
// take Snapshot
final File snapshotFile = zks.takeSnapshot(false, false, true);
final long lastZxidFromSnapshot = Util.getZxidFromName(snapshotFile.getName(), SNAPSHOT_FILE_PREFIX);
// zk2 create more test data after snapshotting
zk2 = ClientBase.createZKClient(HOST_PORT);
for (int i = NODE_COUNT; i < NODE_COUNT * 2; i++) {
final String path = BASE_PATH + "-" + i;
zk2.create(path, String.valueOf(i).getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
}
// restore from snapshot
try (final CheckedInputStream is = SnapStream.getInputStream(snapshotFile)) {
final long lastZxidFromRestore = zks.restoreFromSnapshot(is);
// validate the last processed zxid
assertEquals(lastZxidFromSnapshot, lastZxidFromRestore);
// validate restored data only contains data from snapshot
zk3 = ClientBase.createZKClient(HOST_PORT);
for (int i = 0; i < NODE_COUNT; i++) {
final String path = BASE_PATH + "-" + i;
final String expectedData = String.valueOf(i);
assertArrayEquals(expectedData.getBytes(), zk3.getData(path, null, null));
}
assertEquals(NODE_COUNT + 3, zk3.getAllChildrenNumber("/"));
// validate sessions
final SessionTracker sessionTracker = zks.getSessionTracker();
final Set<Long> globalSessions = sessionTracker.globalSessions();
assertEquals(2, globalSessions.size());
assertTrue(globalSessions.contains(zk1.getSessionId()));
Assertions.assertFalse(globalSessions.contains(zk2.getSessionId()));
assertTrue(globalSessions.contains(zk3.getSessionId()));
// validate ZookeeperServer state
assertEquals(ZooKeeperServer.State.RUNNING, zks.state);
// validate being able to create more data after restore
zk3.create(BASE_PATH + "_" + "after", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
assertEquals(NODE_COUNT + 4, zk3.getAllChildrenNumber("/"));
}
} finally {
System.clearProperty("zookeeper.serializeLastProcessedZxid.enabled");
if (zk1 != null) {
zk1.close();
}
if (zk2 != null) {
zk2.close();
}
if (zk3 != null) {
zk3.close();
}
zks.shutdown();
serverCnxnFactory.shutdown();
}
}
@Test
public void testRestoreFromSnapshot_nulInputStream() throws Exception {
final ZooKeeperServer zks = new ZooKeeperServer(dataDir, logDir, 3000);
assertThrows(IllegalArgumentException.class, () -> zks.restoreFromSnapshot(null));
}
}
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