[HADOOP-12910] Add new FileSystem API to support asynchronous method calls

• Type: New Feature
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Component/s: fs
• Assignee: Xiaobing Zhou
• Reporter: Tsz-wo Sze
• Created: 10/Mar/16 00:46
• Updated: 14/Jun/16 00:28

Description

Add a new API, namely FutureFileSystem (or AsynchronousFileSystem, if it is a better name). All the APIs in FutureFileSystem are the same as FileSystem except that the return type is wrapped by Future, e.g.

  //FileSystem
  public boolean rename(Path src, Path dst) throws IOException;

  //FutureFileSystem
  public Future<Boolean> rename(Path src, Path dst) throws IOException;

Note that FutureFileSystem does not extend FileSystem.

Issue Links

• is part of: HDFS-9924 [umbrella] Nonblocking HDFS Access