jsr203-hadoop

JSR 203 Implementation for Hadoop Distributed File System

Maven artifact

    <dependency>
        <groupId>com.github.jsr203hadoop</groupId>
        <artifactId>jsr203hadoop</artifactId>
        <version>1.0.1</version>
    </dependency>

Prerequisites

jsr203-hadoop requires git, maven (3.0.4 or later), and JDK 1.7 or later.

Download and build

$ git clone git://github.com/damiencarol/jsr203-hadoop.git
$ cd jsr203-hadoop
$ mvn install

Use mvn -DskipTests if you do not want to execute the tests.

Example

jsr203-hadoop provide NIO 2 access to your HDFS cluster. For example, you can build URI starts with hdfs://<namebode>:<port> and use standard NIO API :

URI uri = new URI("hdfs://" + host + ":" + port + "/somefile");
Path file = Paths.get(uri);
System.out.println("File [" + file.toString() + "] exists = '" + Files.exists(file) + "'");

Status

This project is still a beta.

The following features are complete.

Feature	Status	Description
Path support - build from string/URI	Done
Path support - resolve, relativize, equals, ...	Done
Directory stream (provide ability to list files in directory, get status, ...)	Done
Create/delete file/directory	Done
Input/Output	Partial	Full support of SeekableByteChannel, FileChannel pending
Attribute view "basic"	Done	Full support (fileKey is implemented)
Attribute view "owner"	Done	Full support (Use Hadoop UGI)
Attribute view "posix"	Done
Hadoop dedicated view "hadoop" for hadoop specific attributes (len, block size, replication factor)	Done	More attributes will come

More features will come :

Security and permissions
complete list of hadoop specific attributes

For more details, see the Reference guide.

More information

License: Apache License, Version 2.0.
Author: Damien Carol
Source code: http://github.com/damiencarol/jsr203-hadoop