org.apache.hadoop.hbase.regionserver.wal

Interface HLog.Reader

All Known Implementing Classes:

ProtobufLogReader, ReaderBase, SecureProtobufLogReader, SequenceFileLogReader

Enclosing interface:

HLog

public static interface HLog.Reader

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
long	getPosition()
WALProtos.WALTrailer	getWALTrailer()
void	init(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path, org.apache.hadoop.conf.Configuration c, org.apache.hadoop.fs.FSDataInputStream s)
HLog.Entry	next()
HLog.Entry	next(HLog.Entry reuse)
void	reset()
void	seek(long pos)

Method Detail

init

void init(org.apache.hadoop.fs.FileSystem fs,
        org.apache.hadoop.fs.Path path,
        org.apache.hadoop.conf.Configuration c,
        org.apache.hadoop.fs.FSDataInputStream s)
          throws IOException

Parameters:

fs - File system.

path - Path.

c - Configuration.

s - Input stream that may have been pre-opened by the caller; may be null.

Throws:

IOException

close

void close()
           throws IOException

Throws:

IOException

next

HLog.Entry next()
                throws IOException

Throws:

IOException

next

HLog.Entry next(HLog.Entry reuse)
                throws IOException

Throws:

IOException

seek

void seek(long pos)
          throws IOException

Throws:

IOException

getPosition

long getPosition()
                 throws IOException

Throws:

IOException

reset

void reset()
           throws IOException

Throws:

IOException

getWALTrailer

WALProtos.WALTrailer getWALTrailer()

Returns:

the WALTrailer of the current HLog. It may be null in case of legacy or corrupt WAL files.