/**
* 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.hadoop.hdfs;
import static org.junit.Assert.assertTrue;
import org.apache.hadoop.hdfs.server.namenode.AvatarNode;
public class DFSAvatarTestUtil {
/**
* Make sure standby has caught up with primary in reading and applying logs
* This process should not take more than 5 seconds
* @param primaryAvatar
* @param standbyAvatar
*/
public static void assertTxnIdSync(AvatarNode primaryAvatar, AvatarNode standbyAvatar) {
long startTime = System.currentTimeMillis();
long targetTxnId = getCurrentTxId(primaryAvatar);
while (true) {
if (System.currentTimeMillis() - startTime > 5000 ||
getCurrentTxId(standbyAvatar) == targetTxnId) {
break;
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
break;
}
}
assertTrue(getCurrentTxId(standbyAvatar) == targetTxnId);
}
public static long getCurrentTxId(AvatarNode avatar) {
return avatar.getFSImage().getEditLog().getCurrentTxId();
}
}