org.cripac.isee.vpe.util.hdfs

Class HDFSFactory

java.lang.Object

org.cripac.isee.vpe.util.hdfs.HDFSFactory

All Implemented Interfaces:

Serializable, Factory<org.apache.hadoop.fs.FileSystem>

public class HDFSFactory
extends Object
implements Factory<org.apache.hadoop.fs.FileSystem>

The HDFSFactory is used to get or create Hadoop DistributedFileSystem instances.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
HDFSFactory()

Method Summary

Modifier and Type	Method and Description
static org.apache.hadoop.fs.FileSystem	get() Get an existing Hadoop DistributedFileSystem instance.
static org.apache.hadoop.fs.FileSystem	newInstance() Produce a new Hadoop DistributedFileSystem instance.
org.apache.hadoop.fs.FileSystem	produce() Produce a new Hadoop DistributedFileSystem instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

HDFSFactory

public HDFSFactory()

Method Detail

produce

@Nonnull
public org.apache.hadoop.fs.FileSystem produce()
                                                 throws IOException

Produce a new Hadoop DistributedFileSystem instance.

Specified by:

produce in interface Factory<org.apache.hadoop.fs.FileSystem>

Returns:

a new DistributedFileSystem newly produced.

Throws:

IOException - on failure creating a new instance.

newInstance

public static org.apache.hadoop.fs.FileSystem newInstance()
                                                   throws IOException

Produce a new Hadoop DistributedFileSystem instance.

Returns:

a new DistributedFileSystem newly produced.

Throws:

IOException - on failure creating a new instance.

get

public static org.apache.hadoop.fs.FileSystem get()
                                           throws IOException

Get an existing Hadoop DistributedFileSystem instance. If no, create a new one.

Returns:

a DistributedFileSystem instance.

Throws:

IOException - on failure creating a new instance.