/**
* 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.server.namenode;
import java.io.IOException;
import org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.OpInstanceCache;
/**
* Utilities for testing edit logs
*/
public class FSEditLogTestUtil {
private static OpInstanceCache cache = new OpInstanceCache();
public static FSEditLogOp getNoOpInstance() {
return FSEditLogOp.LogSegmentOp.getInstance(cache,
FSEditLogOpCodes.OP_END_LOG_SEGMENT);
}
public static long countTransactionsInStream(EditLogInputStream in)
throws IOException {
FSEditLogLoader.EditLogValidation validation = FSEditLogLoader.validateEditLog(in);
return (validation.getEndTxId() - in.getFirstTxId()) + 1;
}
}