org.apache.flume.source.taildir

Class ReliableTaildirEventReader

java.lang.Object

org.apache.flume.source.taildir.ReliableTaildirEventReader

All Implemented Interfaces:

Closeable, AutoCloseable, EventReader, ReliableEventReader

@InterfaceAudience.Private
 @InterfaceStability.Evolving
public class ReliableTaildirEventReader
extends Object
implements ReliableEventReader

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReliableTaildirEventReader.Builder Special builder class for ReliableTaildirEventReader

Method Summary

Modifier and Type	Method and Description
void	close() Clean-up any state associated with this reader.
void	commit() Commit the last lines which were read.
Map<Long,TailFile>	getTailFiles()
void	loadPositionFile(String filePath) Load a position file which has the last read position of each file.
Event	readEvent() Get the next line associated with the input stream.
List<Event>	readEvents(int numEvents) Get up to n lines associated with the input stream.
List<Event>	readEvents(int numEvents, boolean backoffWithoutNL)
List<Event>	readEvents(TailFile tf, int numEvents)
void	setCurrentFile(TailFile currentFile)
List<Long>	updateTailFiles()
List<Long>	updateTailFiles(boolean skipToEnd) Update tailFiles mapping if a new file is created or appends are detected to the existing file.

Methods inherited from class java.lang.Object

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

Method Detail

loadPositionFile

public void loadPositionFile(String filePath)

Load a position file which has the last read position of each file. If the position file exists, update tailFiles mapping.

getTailFiles

public Map<Long,TailFile> getTailFiles()

setCurrentFile

public void setCurrentFile(TailFile currentFile)

readEvent

public Event readEvent()
                throws IOException

Description copied from interface: EventReader

Get the next line associated with the input stream. If this returns null, the input underlying input source is considered finished. Note that this is allowed to block for indefinite amounts of time waiting to generate a new line.

Specified by:

readEvent in interface EventReader

Throws:

IOException

readEvents

public List<Event> readEvents(int numEvents)
                       throws IOException

Description copied from interface: EventReader

Get up to n lines associated with the input stream. If this returns less than n lines, the input underlying input source is considered finished. Note that this is allowed to block for indefinite amounts of time waiting to generate a new line.

Specified by:

readEvents in interface EventReader

Throws:

IOException

readEvents

public List<Event> readEvents(TailFile tf,
                              int numEvents)
                       throws IOException

Throws:

IOException

readEvents

public List<Event> readEvents(int numEvents,
                              boolean backoffWithoutNL)
                       throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Description copied from interface: EventReader

Clean-up any state associated with this reader.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface EventReader

Throws:

IOException

commit

public void commit()
            throws IOException

Commit the last lines which were read.

Specified by:

commit in interface ReliableEventReader

Throws:

IOException

updateTailFiles

public List<Long> updateTailFiles(boolean skipToEnd)
                           throws IOException

Update tailFiles mapping if a new file is created or appends are detected to the existing file.

Throws:

IOException

updateTailFiles

public List<Long> updateTailFiles()
                           throws IOException

Throws:

IOException