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An Amazon AWS S3 FileSystem Provider JSR-203 for Java 7 (NIO2)

Amazon Simple Storage Service provides a fully redundant data storage infrastructure for storing and retrieving any amount of data, at any time. NIO2 is the new file management API, introduced in Java version 7. This project provides a first API implementation, little optimized, but "complete" to manage files and folders directly on Amazon S3.

## How to use

<dependency>
	<groupId>com.upplication</groupId>
	<artifactId>s3fs</artifactId>
	<version>1.2.2</version>
</dependency>

And add to your META-INF/services/java.nio.file.spi.FileSystemProvider (create if not exists yet) a new line like this: com.upplication.s3fs.S3FileSystemProvider.

All settings for S3FileSystem and for the underlying AmazonS3 connector library can be set through System properties or environment variables. Possible settings can be found in com.upplication.s3fs.AmazonS3Factory.

### Using service locator and system vars

Check that s3fs_access_key and s3fs_secret_key system vars are present with the correct values to have full access to your amazon s3 bucket.

Use this code to create the fileSystem and set to a concrete endpoint.

FileSystems.newFileSystem("s3:///", new HashMap<String,Object>(), Thread.currentThread().getContextClassLoader());

Add to your resources folder the file amazon.properties with the content: s3fs_access_key=access key s3fs_secret_key=secret key

Use this code to create the fileSystem and set to a concrete endpoint.

FileSystems.newFileSystem("s3:///", new HashMap<String,Object>(), Thread.currentThread().getContextClassLoader());

Create a map with the authentication and use the fileSystem to create the fileSystem and set to a concrete endpoint.

Map<String, ?> env = ImmutableMap.<String, Object> builder()
				.put(com.upplication.s3fs.AmazonS3Factory.ACCESS_KEY, "access key")
				.put(com.upplication.s3fs.AmazonS3Factory.SECRET_KEY, "secret key").build()
FileSystems.newFileSystem("s3:///", env, Thread.currentThread().getContextClassLoader());

Complete settings lists:

• s3fs_access_key
• s3fs_secret_key
• s3fs_request_metric_collector_class
• s3fs_connection_timeout
• s3fs_max_connections
• s3fs_max_retry_error
• s3fs_protocol
• s3fs_proxy_domain
• s3fs_proxy_host
• s3fs_proxy_password
• s3fs_proxy_port
• s3fs_proxy_username
• s3fs_proxy_workstation
• s3fs_socket_send_buffer_size_hint
• s3fs_socket_receive_buffer_size_hint
• s3fs_socket_timeout
• s3fs_user_agent
• s3fs_amazon_s3_factory

// Northern Virginia or Pacific Northwest
FileSystems.newFileSystem("s3://s3.amazonaws.com/", env, Thread.currentThread().getContextClassLoader());
// Northern Virginia only
FileSystems.newFileSystem("s3://s3-external-1.amazonaws.com/", env, Thread.currentThread().getContextClassLoader());
// US West (Oregon) Region
FileSystems.newFileSystem("s3://s3-us-west-2.amazonaws.com/", env, Thread.currentThread().getContextClassLoader());
// US West (Northern California) Region
FileSystems.newFileSystem("s3://s3-us-west-1.amazonaws.com/", env, Thread.currentThread().getContextClassLoader());
// EU (Ireland) Region
FileSystems.newFileSystem("s3://s3-eu-west-1.amazonaws.com/", env, Thread.currentThread().getContextClassLoader());

For a complete list of available regions look at: http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region

## Features:

• Copy and create folders and files
• Delete folders and files
• Copy paths between different providers
• Walk file tree
• Works with virtual s3 folders (not really exists and are element's subkeys)
• List buckets for the client
• Multi endpoint fileSystem

• Performance issue (slow querys with virtual folders, add multipart submit...)
• Disallow upload binary files with same name as folders and vice versa

## Out of Roadmap:

• Watchers

Clone the github repository:

git clone https://github.com/Upplication/Amazon-S3-FileSystem-NIO2.git

To run the tests:

First, you must copy the file src/test/resources/amazon-test-sample.properties and paste in the same directory with the name amazon-test.properties. In your copy you must edit all the keys:

bucket_name=/your-bucket-name for test
# http://docs.aws.amazon.com/general/latest/gr/rande.html 
s3fs_secret_key= your secret key for test
s3fs_access_key=your access key for test

Thats all, now you can run the test with the command: mvn test or mvn integration-test -Pintegration-tests

## LICENSE:

Amazon S3 FileSystem NIO2 is released under the MIT License.