WriterBase (Apache HBase 1.4.11 API)

java.lang.Object
- org.apache.hadoop.hbase.regionserver.wal.WriterBase

All Implemented Interfaces:

Closeable, AutoCloseable, DefaultWALProvider.Writer, WALProvider.Writer

Direct Known Subclasses:

ProtobufLogWriter
```
@InterfaceAudience.Private
public abstract class WriterBase
extends Object
implements DefaultWALProvider.Writer
```
Context used by our wal dictionary compressor. Null if we're not to do our custom dictionary compression.

Field Summary

Fields
Modifier and Type Field and Description

protected CompressionContext compressionContext

protected org.apache.hadoop.conf.Configuration conf

Fields
Modifier and Type	Field and Description
`protected CompressionContext`	`compressionContext`
`protected org.apache.hadoop.conf.Configuration`	`conf`

Constructor Summary

Constructors
Constructor and Description

WriterBase()

Constructors
Constructor and Description
`WriterBase()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`init(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path, org.apache.hadoop.conf.Configuration conf, boolean overwritable)`
`boolean`	`initializeCompressionContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path path)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hbase.wal.WALProvider.Writer
append, getLength, sync

Methods inherited from interface java.io.Closeable
close

Field Detail

compressionContext

protected CompressionContext compressionContext

conf

protected org.apache.hadoop.conf.Configuration conf

Constructor Detail
- WriterBase
```
public WriterBase()
```

Method Detail

init

public void init(org.apache.hadoop.fs.FileSystem fs,
        org.apache.hadoop.fs.Path path,
        org.apache.hadoop.conf.Configuration conf,
        boolean overwritable)
          throws IOException

Specified by:: init in interface DefaultWALProvider.Writer
Throws:: IOException

initializeCompressionContext

public boolean initializeCompressionContext(org.apache.hadoop.conf.Configuration conf,
                                   org.apache.hadoop.fs.Path path)
                                     throws IOException

Throws:: IOException

Class WriterBase

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.hadoop.hbase.wal.WALProvider.Writer

Methods inherited from interface java.io.Closeable

Field Detail

compressionContext

conf

Constructor Detail

WriterBase

Method Detail

init

initializeCompressionContext