Package org.apache.storm.hdfs.trident.rotation

Class FileSizeRotationPolicy

java.lang.Object

org.apache.storm.hdfs.trident.rotation.FileSizeRotationPolicy

All Implemented Interfaces:

Serializable, FileRotationPolicy

public class FileSizeRotationPolicy
extends Object
implements FileRotationPolicy

File rotation policy that will rotate files when a certain file size is reached.

For example:

     // rotate when files reach 5MB
     FileSizeRotationPolicy policy =
          new FileSizeRotationPolicy(5.0, Units.MB);
 

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FileSizeRotationPolicy.Units

Constructor Summary

Constructors

Constructor	Description
FileSizeRotationPolicy(float count, FileSizeRotationPolicy.Units units)

Method Summary

Modifier and Type	Method	Description
long	getMaxBytes()
boolean	mark(long offset)	Check if a file rotation should be performed based on the offset at which file is being written.
boolean	mark(TridentTuple tuple, long offset)	Called for every tuple the HdfsBolt executes.
void	reset()	Called after the HdfsBolt rotates a file.
void	start()	Start the policy.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSizeRotationPolicy

public FileSizeRotationPolicy(float count,
                              FileSizeRotationPolicy.Units units)

Method Detail

mark

public boolean mark(TridentTuple tuple,
                    long offset)

Description copied from interface: FileRotationPolicy

Called for every tuple the HdfsBolt executes.

Specified by:

mark in interface FileRotationPolicy

Parameters:

tuple - The tuple executed.

offset - current offset of file being written

Returns:

true if a file rotation should be performed

mark

public boolean mark(long offset)

Description copied from interface: FileRotationPolicy

Check if a file rotation should be performed based on the offset at which file is being written.

Specified by:

mark in interface FileRotationPolicy

Parameters:

offset - the current offset of file being written

Returns:

true if a file rotation should be performed.

reset

public void reset()

Description copied from interface: FileRotationPolicy

Called after the HdfsBolt rotates a file.

Specified by:

reset in interface FileRotationPolicy

start

public void start()

Description copied from interface: FileRotationPolicy

Start the policy. Useful in case of policies like timed rotation where the timer can be started.

Specified by:

start in interface FileRotationPolicy

getMaxBytes

public long getMaxBytes()