org.apache.samza.system.hdfs.reader

Interface SingleFileHdfsReader

All Known Implementing Classes:

AvroFileHdfsReader

public interface SingleFileHdfsReader

Method Summary

Modifier and Type	Method and Description
void	close() Close the reader.
boolean	hasNext() Whether there are still records to be read
java.lang.String	nextOffset() Get the next offset, which is the offset for the next message that will be returned by readNext
void	open(java.lang.String path, java.lang.String offset) Open the file and seek to specific offset for reading.
org.apache.samza.system.IncomingMessageEnvelope	readNext() Construct and return the next message envelope
void	seek(java.lang.String offset) Seek to a specific offset

Method Detail

open

void open(java.lang.String path,
          java.lang.String offset)

Open the file and seek to specific offset for reading.

Parameters:

path - path of the file to be read

offset - offset the reader should start from

seek

void seek(java.lang.String offset)

Seek to a specific offset

Parameters:

offset - offset the reader should seek to

readNext

org.apache.samza.system.IncomingMessageEnvelope readNext()

Construct and return the next message envelope

Returns:

constructed IncomeMessageEnvelope

nextOffset

java.lang.String nextOffset()

Get the next offset, which is the offset for the next message that will be returned by readNext

Returns:

next offset

hasNext

boolean hasNext()

Whether there are still records to be read

Returns:

true of false based on whether the reader has hit end of file

close

void close()

Close the reader.