| /** |
| * 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.offlineImageViewer; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * ImageVisitor to spot check an fsimage and generate several statistics |
| * about it that we can compare with known values to give a reasonable |
| * assertion that the image was processed correctly. |
| */ |
| class SpotCheckImageVisitor extends ImageVisitor { |
| |
| // Statistics gathered by the visitor for Inodes and InodesUnderConstruction |
| static public class ImageInfo { |
| public long totalNumBlocks = 0; // Total number of blocks in section |
| public Set<String> pathNames = new HashSet<String>(); // All path names |
| public long totalFileSize = 0; // Total size of all the files |
| public long totalReplications = 0; // Sum of all the replications |
| } |
| |
| final private ImageInfo inodes = new ImageInfo(); |
| final private ImageInfo INUCs = new ImageInfo(); |
| private ImageInfo current = null; |
| |
| @Override |
| void visit(ImageElement element, String value) throws IOException { |
| if(element == ImageElement.NUM_BYTES) |
| current.totalFileSize += Long.valueOf(value); |
| else if (element == ImageElement.REPLICATION) |
| current.totalReplications += Long.valueOf(value); |
| else if (element == ImageElement.INODE_PATH) |
| current.pathNames.add(value); |
| } |
| |
| @Override |
| void visitEnclosingElement(ImageElement element, ImageElement key, |
| String value) throws IOException { |
| switch(element) { |
| case INODES: |
| current = inodes; |
| break; |
| case INODES_UNDER_CONSTRUCTION: |
| current = INUCs; |
| break; |
| case BLOCKS: |
| current.totalNumBlocks += Long.valueOf(value); |
| break; |
| // OK to not have a default, we're skipping most of the values |
| } |
| } |
| |
| public ImageInfo getINodesInfo() { return inodes; } |
| |
| public ImageInfo getINUCsInfo() { return INUCs; } |
| |
| // Unnecessary visitor methods |
| @Override |
| void finish() throws IOException {} |
| |
| @Override |
| void finishAbnormally() throws IOException {} |
| |
| @Override |
| void leaveEnclosingElement() throws IOException {} |
| |
| @Override |
| void start() throws IOException {} |
| |
| @Override |
| void visitEnclosingElement(ImageElement element) throws IOException {} |
| } |