| /** |
| * |
| * 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.hbase.util; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.PathFilter; |
| |
| /** |
| * Utility methods for interacting with the hbase.root file system. |
| */ |
| @InterfaceAudience.Private |
| public final class FSVisitor { |
| private static final Log LOG = LogFactory.getLog(FSVisitor.class); |
| |
| public interface StoreFileVisitor { |
| void storeFile(final String region, final String family, final String hfileName) |
| throws IOException; |
| } |
| |
| private FSVisitor() { |
| // private constructor for utility class |
| } |
| |
| /** |
| * Iterate over the table store files |
| * |
| * @param fs {@link FileSystem} |
| * @param tableDir {@link Path} to the table directory |
| * @param visitor callback object to get the store files |
| * @throws IOException if an error occurred while scanning the directory |
| */ |
| public static void visitTableStoreFiles(final FileSystem fs, final Path tableDir, |
| final StoreFileVisitor visitor) throws IOException { |
| List<FileStatus> regions = FSUtils.listStatusWithStatusFilter(fs, tableDir, new FSUtils.RegionDirFilter(fs)); |
| if (regions == null) { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("No regions under directory:" + tableDir); |
| } |
| return; |
| } |
| |
| for (FileStatus region: regions) { |
| visitRegionStoreFiles(fs, region.getPath(), visitor); |
| } |
| } |
| |
| /** |
| * Iterate over the region store files |
| * |
| * @param fs {@link FileSystem} |
| * @param regionDir {@link Path} to the region directory |
| * @param visitor callback object to get the store files |
| * @throws IOException if an error occurred while scanning the directory |
| */ |
| public static void visitRegionStoreFiles(final FileSystem fs, final Path regionDir, |
| final StoreFileVisitor visitor) throws IOException { |
| List<FileStatus> families = FSUtils.listStatusWithStatusFilter(fs, regionDir, new FSUtils.FamilyDirFilter(fs)); |
| if (families == null) { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("No families under region directory:" + regionDir); |
| } |
| return; |
| } |
| |
| PathFilter fileFilter = new FSUtils.FileFilter(fs); |
| for (FileStatus family: families) { |
| Path familyDir = family.getPath(); |
| String familyName = familyDir.getName(); |
| |
| // get all the storeFiles in the family |
| FileStatus[] storeFiles = FSUtils.listStatus(fs, familyDir, fileFilter); |
| if (storeFiles == null) { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("No hfiles found for family: " + familyDir + ", skipping."); |
| } |
| continue; |
| } |
| |
| for (FileStatus hfile: storeFiles) { |
| Path hfilePath = hfile.getPath(); |
| visitor.storeFile(regionDir.getName(), familyName, hfilePath.getName()); |
| } |
| } |
| } |
| } |