| /** |
| * 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.oozie.dependency; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.oozie.ErrorCode; |
| import org.apache.oozie.action.hadoop.FSLauncherURIHandler; |
| import org.apache.oozie.action.hadoop.LauncherURIHandler; |
| import org.apache.oozie.service.HadoopAccessorException; |
| import org.apache.oozie.service.HadoopAccessorService; |
| import org.apache.oozie.service.Services; |
| |
| public class FSURIHandler implements URIHandler { |
| |
| private HadoopAccessorService service; |
| private Set<String> supportedSchemes; |
| private List<Class<?>> classesToShip; |
| |
| @Override |
| public void init(Configuration conf) { |
| service = Services.get().get(HadoopAccessorService.class); |
| supportedSchemes = service.getSupportedSchemes(); |
| classesToShip = new FSLauncherURIHandler().getClassesForLauncher(); |
| } |
| |
| @Override |
| public Set<String> getSupportedSchemes() { |
| return supportedSchemes; |
| } |
| |
| @Override |
| public Class<? extends LauncherURIHandler> getLauncherURIHandlerClass() { |
| return FSLauncherURIHandler.class; |
| } |
| |
| @Override |
| public List<Class<?>> getClassesForLauncher() { |
| return classesToShip; |
| } |
| |
| @Override |
| public DependencyType getDependencyType(URI uri) throws URIHandlerException { |
| return DependencyType.PULL; |
| } |
| |
| @Override |
| public void registerForNotification(URI uri, Configuration conf, String user, String actionID) |
| throws URIHandlerException { |
| throw new UnsupportedOperationException("Notifications are not supported for " + uri.getScheme()); |
| } |
| |
| @Override |
| public boolean unregisterFromNotification(URI uri, String actionID) { |
| throw new UnsupportedOperationException("Notifications are not supported for " + uri.getScheme()); |
| } |
| |
| @Override |
| public Context getContext(URI uri, Configuration conf, String user, boolean readOnly) throws URIHandlerException { |
| FileSystem fs = getFileSystem(uri, conf, user); |
| return new FSContext(conf, user, fs); |
| } |
| |
| @Override |
| public boolean exists(URI uri, Context context) throws URIHandlerException { |
| try { |
| FileSystem fs = ((FSContext) context).getFileSystem(); |
| return fs.exists(getNormalizedPath(uri)); |
| } |
| catch (IOException e) { |
| throw new HadoopAccessorException(ErrorCode.E0902, e); |
| } |
| } |
| |
| @Override |
| public boolean exists(URI uri, Configuration conf, String user) throws URIHandlerException { |
| try { |
| FileSystem fs = getFileSystem(uri, conf, user); |
| return fs.exists(getNormalizedPath(uri)); |
| } |
| catch (HadoopAccessorException e) { |
| if (ErrorCode.E0902.equals(e.getErrorCode()) && e.getMessage() != null |
| && e.getMessage().indexOf("Invalid path for the Har Filesystem. No index file") != -1) { |
| return false; |
| } |
| else { |
| throw e; |
| } |
| } |
| catch (IOException e) { |
| throw new HadoopAccessorException(ErrorCode.E0902, e); |
| } |
| } |
| |
| @Override |
| public String getURIWithDoneFlag(String uri, String doneFlag) throws URIHandlerException { |
| if (doneFlag.length() > 0) { |
| uri += "/" + doneFlag; |
| } |
| return uri; |
| } |
| |
| @Override |
| public String getURIWithoutDoneFlag(String uri, String doneFlag) throws URIHandlerException { |
| if (doneFlag.length() > 0 && uri.endsWith(doneFlag)) { |
| return uri.substring(0, uri.lastIndexOf("/" + doneFlag)); |
| } |
| return uri; |
| } |
| |
| |
| @Override |
| public void validate(String uri) throws URIHandlerException { |
| } |
| |
| @Override |
| public void destroy() { |
| |
| } |
| |
| @Override |
| public void delete(URI uri, Context context) throws URIHandlerException { |
| FileSystem fs = ((FSContext) context).getFileSystem(); |
| Path path = new Path(uri); |
| try { |
| if (fs.exists(path)) { |
| if (!fs.delete(path, true)) { |
| throw new URIHandlerException(ErrorCode.E0907, path.toString()); |
| } |
| } |
| } |
| catch (IOException e) { |
| throw new URIHandlerException(ErrorCode.E0907, path.toString()); |
| } |
| } |
| |
| @Override |
| public void delete(URI uri, Configuration conf, String user) throws URIHandlerException { |
| Path path = new Path(uri); |
| FileSystem fs = getFileSystem(uri, conf, user); |
| try{ |
| if (fs.exists(path)) { |
| if (!fs.delete(path, true)) { |
| throw new URIHandlerException(ErrorCode.E0907, path.toString()); |
| } |
| } |
| } catch (IOException e){ |
| throw new URIHandlerException(ErrorCode.E0907, path.toString()); |
| } |
| } |
| |
| private Path getNormalizedPath(URI uri) { |
| // Normalizes uri path replacing // with / in the path which users specify by mistake |
| return new Path(uri.getScheme(), uri.getAuthority(), uri.getPath()); |
| } |
| |
| private FileSystem getFileSystem(URI uri, Configuration conf, String user) throws HadoopAccessorException { |
| if (user == null) { |
| throw new HadoopAccessorException(ErrorCode.E0902, "user has to be specified to access FileSystem"); |
| } |
| Configuration fsConf = service.createConfiguration(uri.getAuthority()); |
| return service.createFileSystem(user, uri, fsConf); |
| } |
| |
| static class FSContext extends Context { |
| |
| private FileSystem fs; |
| |
| /** |
| * Create a FSContext that can be used to access a filesystem URI |
| * |
| * @param conf Configuration to access the URI |
| * @param user name of the user the URI should be accessed as |
| * @param fs FileSystem to access |
| */ |
| public FSContext(Configuration conf, String user, FileSystem fs) { |
| super(conf, user); |
| this.fs = fs; |
| } |
| |
| /** |
| * Get the FileSystem to access the URI |
| * @return FileSystem to access the URI |
| */ |
| public FileSystem getFileSystem() { |
| return fs; |
| } |
| } |
| |
| } |