| /** |
| * 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.tools.offlineEditsViewer; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| import org.apache.hadoop.hdfs.tools.offlineEditsViewer.OfflineEditsViewer; |
| import org.apache.hadoop.hdfs.protocol.HdfsConstants; |
| import org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream; |
| |
| import org.apache.hadoop.hdfs.server.namenode.EditLogInputStream; |
| |
| /** |
| * OfflineEditsLoader walks an EditsVisitor over an EditLogInputStream |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| interface OfflineEditsLoader { |
| |
| abstract public void loadEdits() throws IOException; |
| |
| static class OfflineEditsLoaderFactory { |
| static OfflineEditsLoader createLoader(OfflineEditsVisitor visitor, |
| String inputFileName, boolean xmlInput, |
| OfflineEditsViewer.Flags flags) throws IOException { |
| if (xmlInput) { |
| return new OfflineEditsXmlLoader(visitor, new File(inputFileName), flags); |
| } else { |
| File file = null; |
| EditLogInputStream elis = null; |
| OfflineEditsLoader loader = null; |
| try { |
| file = new File(inputFileName); |
| elis = new EditLogFileInputStream(file, HdfsConstants.INVALID_TXID, |
| HdfsConstants.INVALID_TXID, false); |
| loader = new OfflineEditsBinaryLoader(visitor, elis, flags); |
| } finally { |
| if ((loader == null) && (elis != null)) { |
| elis.close(); |
| } |
| } |
| return loader; |
| } |
| } |
| } |
| } |