| /** |
| * 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.eclipse.dfs; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.logging.Logger; |
| |
| import org.apache.hadoop.hdfs.DistributedFileSystem; |
| import org.apache.hadoop.eclipse.ErrorMessageDialog; |
| import org.apache.hadoop.eclipse.server.ConfProp; |
| import org.apache.hadoop.eclipse.server.HadoopServer; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.jface.dialogs.MessageDialog; |
| |
| /** |
| * DFS Path handling for DFS |
| */ |
| public abstract class DFSPath implements DFSContent { |
| |
| protected final DFSContentProvider provider; |
| |
| protected HadoopServer location; |
| |
| private DistributedFileSystem dfs = null; |
| |
| protected final Path path; |
| |
| protected final DFSPath parent; |
| |
| /** |
| * For debugging purpose |
| */ |
| static Logger log = Logger.getLogger(DFSPath.class.getName()); |
| |
| /** |
| * Create a path representation for the given location in the given viewer |
| * |
| * @param location |
| * @param path |
| * @param viewer |
| */ |
| public DFSPath(DFSContentProvider provider, HadoopServer location) |
| throws IOException { |
| |
| this.provider = provider; |
| this.location = location; |
| this.path = new Path("/"); |
| this.parent = null; |
| } |
| |
| /** |
| * Create a sub-path representation for the given parent path |
| * |
| * @param parent |
| * @param path |
| */ |
| protected DFSPath(DFSPath parent, Path path) { |
| this.provider = parent.provider; |
| this.location = parent.location; |
| this.dfs = parent.dfs; |
| this.parent = parent; |
| this.path = path; |
| } |
| |
| protected void dispose() { |
| // Free the DFS connection |
| } |
| |
| /* @inheritDoc */ |
| @Override |
| public String toString() { |
| if (path.equals("/")) { |
| return location.getConfProp(ConfProp.FS_DEFAULT_URI); |
| |
| } else { |
| return this.path.getName(); |
| } |
| } |
| |
| /** |
| * Does a recursive delete of the remote directory tree at this node. |
| */ |
| public void delete() { |
| try { |
| getDFS().delete(this.path, true); |
| |
| } catch (IOException e) { |
| e.printStackTrace(); |
| MessageDialog.openWarning(null, "Delete file", |
| "Unable to delete file \"" + this.path + "\"\n" + e); |
| } |
| } |
| |
| public DFSPath getParent() { |
| return parent; |
| } |
| |
| public abstract void refresh(); |
| |
| /** |
| * Refresh the UI element for this content |
| */ |
| public void doRefresh() { |
| provider.refresh(this); |
| } |
| |
| /** |
| * Copy the DfsPath to the given local directory |
| * |
| * @param directory the local directory |
| */ |
| public abstract void downloadToLocalDirectory(IProgressMonitor monitor, |
| File dir); |
| |
| public Path getPath() { |
| return this.path; |
| } |
| |
| /** |
| * Gets a connection to the DFS |
| * |
| * @return a connection to the DFS |
| * @throws IOException |
| */ |
| DistributedFileSystem getDFS() throws IOException { |
| if (this.dfs == null) { |
| FileSystem fs = location.getDFS(); |
| if (!(fs instanceof DistributedFileSystem)) { |
| ErrorMessageDialog.display("DFS Browser", |
| "The DFS Browser cannot browse anything else " |
| + "but a Distributed File System!"); |
| throw new IOException("DFS Browser expects a DistributedFileSystem!"); |
| } |
| this.dfs = (DistributedFileSystem) fs; |
| } |
| return this.dfs; |
| } |
| |
| public abstract int computeDownloadWork(); |
| |
| } |