| /** |
| * 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.zookeeper; |
| |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLDecoder; |
| import java.net.URLEncoder; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.master.SplitLogManager; |
| import org.apache.hadoop.hbase.regionserver.SplitLogWorker; |
| |
| /** |
| * Common methods and attributes used by {@link SplitLogManager} and {@link SplitLogWorker} |
| * running distributed splitting of WAL logs. |
| */ |
| @InterfaceAudience.Private |
| public class ZKSplitLog { |
| private static final Log LOG = LogFactory.getLog(ZKSplitLog.class); |
| |
| /** |
| * Gets the full path node name for the log file being split. |
| * This method will url encode the filename. |
| * @param zkw zk reference |
| * @param filename log file name (only the basename) |
| */ |
| public static String getEncodedNodeName(ZooKeeperWatcher zkw, String filename) { |
| return ZKUtil.joinZNode(zkw.splitLogZNode, encode(filename)); |
| } |
| |
| public static String getFileName(String node) { |
| String basename = node.substring(node.lastIndexOf('/') + 1); |
| return decode(basename); |
| } |
| |
| static String encode(String s) { |
| try { |
| return URLEncoder.encode(s, "UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| throw new RuntimeException("URLENCODER doesn't support UTF-8"); |
| } |
| } |
| |
| static String decode(String s) { |
| try { |
| return URLDecoder.decode(s, "UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| throw new RuntimeException("URLDecoder doesn't support UTF-8"); |
| } |
| } |
| |
| public static String getRescanNode(ZooKeeperWatcher zkw) { |
| return ZKUtil.joinZNode(zkw.splitLogZNode, "RESCAN"); |
| } |
| |
| public static boolean isRescanNode(ZooKeeperWatcher zkw, String path) { |
| String prefix = getRescanNode(zkw); |
| if (path.length() <= prefix.length()) { |
| return false; |
| } |
| for (int i = 0; i < prefix.length(); i++) { |
| if (prefix.charAt(i) != path.charAt(i)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| public static boolean isTaskPath(ZooKeeperWatcher zkw, String path) { |
| String dirname = path.substring(0, path.lastIndexOf('/')); |
| return dirname.equals(zkw.splitLogZNode); |
| } |
| |
| public static Path getSplitLogDir(Path rootdir, String tmpname) { |
| return new Path(new Path(rootdir, HConstants.SPLIT_LOGDIR_NAME), tmpname); |
| } |
| |
| |
| public static String getSplitLogDirTmpComponent(final String worker, String file) { |
| return worker + "_" + ZKSplitLog.encode(file); |
| } |
| |
| public static void markCorrupted(Path rootdir, String logFileName, |
| FileSystem fs) { |
| Path file = new Path(getSplitLogDir(rootdir, logFileName), "corrupt"); |
| try { |
| fs.createNewFile(file); |
| } catch (IOException e) { |
| LOG.warn("Could not flag a log file as corrupted. Failed to create " + |
| file, e); |
| } |
| } |
| |
| public static boolean isCorrupted(Path rootdir, String logFileName, |
| FileSystem fs) throws IOException { |
| Path file = new Path(getSplitLogDir(rootdir, logFileName), "corrupt"); |
| boolean isCorrupt; |
| isCorrupt = fs.exists(file); |
| return isCorrupt; |
| } |
| |
| } |