001 /* 002 * Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved. 003 * 004 * Project and contact information: http://www.cascading.org/ 005 * 006 * This file is part of the Cascading project. 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020 021 package cascading.tap.hadoop.io; 022 023 import java.io.IOException; 024 025 import org.apache.hadoop.conf.Configuration; 026 import org.apache.hadoop.fs.FSDataOutputStream; 027 import org.apache.hadoop.fs.FileStatus; 028 import org.apache.hadoop.fs.FileSystem; 029 import org.apache.hadoop.fs.Path; 030 import org.apache.hadoop.fs.permission.FsPermission; 031 import org.apache.hadoop.util.Progressable; 032 033 /** Class StreamedFileSystem is a base class for {@link FileSystem} implementations that manage remote resources. */ 034 public abstract class StreamedFileSystem extends FileSystem 035 { 036 @Override 037 public FSDataOutputStream create( Path path, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress ) throws IOException 038 { 039 throw new UnsupportedOperationException( "not supported" ); 040 } 041 042 @Override 043 public boolean rename( Path path, Path path1 ) throws IOException 044 { 045 throw new UnsupportedOperationException( "not supported" ); 046 } 047 048 @Deprecated 049 @Override 050 public boolean delete( Path path ) throws IOException 051 { 052 throw new UnsupportedOperationException( "not supported" ); 053 } 054 055 @Override 056 public boolean delete( Path path, boolean b ) throws IOException 057 { 058 throw new UnsupportedOperationException( "not supported" ); 059 } 060 061 @Override 062 public Path getWorkingDirectory() 063 { 064 return new Path( "/" ).makeQualified( this ); 065 } 066 067 @Override 068 public void setWorkingDirectory( Path f ) 069 { 070 } 071 072 @Override 073 public boolean mkdirs( Path path, FsPermission fsPermission ) throws IOException 074 { 075 throw new UnsupportedOperationException( "not supported" ); 076 } 077 078 @Override 079 public FileStatus[] listStatus( Path path ) throws IOException 080 { 081 return new FileStatus[]{getFileStatus( path )}; 082 } 083 084 public FSDataOutputStream append( Path f, int bufferSize, Progressable progress ) throws IOException 085 { 086 throw new UnsupportedOperationException( "not supported" ); 087 } 088 089 public static String getMD5SumFor( Configuration conf, Path path ) 090 { 091 return getMD5SumFor( conf, path.toString() ); 092 } 093 094 public static String getMD5SumFor( Configuration conf, String path ) 095 { 096 return conf.get( path + ".md5" ); 097 } 098 099 public static void setMD5SumFor( Configuration conf, Path path, String md5Hex ) 100 { 101 setMD5SumFor( conf, path.toString(), md5Hex ); 102 } 103 104 public static void setMD5SumFor( Configuration conf, String path, String md5Hex ) 105 { 106 if( md5Hex == null || md5Hex.length() == 0 ) 107 return; 108 109 conf.set( path + ".md5", md5Hex ); 110 } 111 }