[#HADOOP-6223] New improved FileSystem interface for those implementing new files systems.

Hadoop Common

HADOOP-4952

New improved FileSystem interface for those implementing new files systems.

Created: 31/Aug/09 12:33 AM Updated: 30/Oct/09 10:26 PM

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Component/s:

Affects Version/s:

None

Fix Version/s:

0.22.0

Time Tracking:

Not Specified

File Attachments:

File Name	Date Attached	Attached By	Size
AbstractFileSystem.java	2009-09-25 04:10 PM	Sanjay Radia	18 kB
afs1.patch	2009-10-01 03:54 PM	Sanjay Radia	61 kB
AFS10.patch	2009-10-12 09:55 AM	Sanjay Radia	109 kB
AFS11.patch	2009-10-13 01:04 AM	Sanjay Radia	109 kB
AFS15.patch	2009-10-15 07:06 PM	Sanjay Radia	100 kB
AFS16.patch	2009-10-20 06:58 AM	Suresh Srinivas	109 kB
AFS17.patch	2009-10-29 03:33 PM	Sanjay Radia	113 kB
AFS18.patch	2009-10-29 09:52 PM	Sanjay Radia	113 kB
AFS4.patch	2009-10-09 08:25 PM	Sanjay Radia	94 kB
Hdfs.java	2009-10-01 03:54 PM	Sanjay Radia	5 kB
Hdfs.java	2009-09-25 04:10 PM	Sanjay Radia	4 kB

Issue Links:

Dependants

This issue blocks:

~~HDFS-702~~ Add Hdfs Impl for the new file system interface

Reference

This issue relates to:

HADOOP-6265 Remove deprecated protected methods added to FileSystem to support FileContext.

HADOOP-4357 Rename all the FSXxx classes to FsXxx

This issue is related to:

~~HADOOP-4952~~ Improved files system interface for the application writer.

HADOOP-6324 FileSystem API should allow progress callbacks in rename and delete

Hadoop Flags:	Reviewed
Release Note:	Add new file system interface AbstractFileSystem with implementation of some file systems that delegate to old FileSystem.
Resolution Date:	30/Oct/09 10:26 PM

Description

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The FileContext API (~~HADOOP-4952~~) provides an improved interface for the application writer.
This lets us simplify the FileSystem API since it will no longer need to deal with notions of default filesystem [ / ], wd, and config
defaults for blocksize, replication factor etc. Further it will not need the many overloaded methods for create() and open() since
the FileContext API provides that convenience.
The FileSystem API can be simplified and can now be restricted to those implementing new file systems.

This jira proposes that we create new file system API, and deprecate FileSystem API after a few releases.

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Work Log

Change History

Subversion Commits

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Repository	Revision	Date	User	Message
ASF	#831475	Fri Oct 30 22:24:22 UTC 2009	suresh	~~HADOOP-6223~~. Add new file system interface AbstractFileSystem with implementation of some file systems that delegate to old FileSystem. Contributed by Sanjay Radia.
				Files Changed
				MODIFY /hadoop/common/trunk/CHANGES.txt MODIFY /hadoop/common/trunk/src/java/org/apache/hadoop/fs/Options.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/local/LocalConfigKeys.java ADD /hadoop/common/trunk/src/test/core/org/apache/hadoop/fs/TestFcLocalFsPermission.java ADD /hadoop/common/trunk/src/test/core/org/apache/hadoop/fs/FileContextPermissionBase.java MODIFY /hadoop/common/trunk/src/java/org/apache/hadoop/fs/ftp/FTPFileSystemConfigKeys.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/local/LocalFs.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/local/RawLocalFs.java MODIFY /hadoop/common/trunk/src/java/org/apache/hadoop/fs/FileContext.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/ChecksumFs.java MODIFY /hadoop/common/trunk/src/java/org/apache/hadoop/fs/FileStatus.java MODIFY /hadoop/common/trunk/src/test/core/org/apache/hadoop/fs/TestFileContextDeleteOnExit.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/AbstractFileSystem.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/DelegateToFileSystem.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/ftp/FtpConfigKeys.java MODIFY /hadoop/common/trunk/src/java/core-default.xml ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/local ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/FilterFs.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/ftp/FtpFs.java ADD /hadoop/common/trunk/src/java/org/apache/hadoop/fs/FsConstants.java