org.apache.hadoop.fs.azure

Class SyncableDataOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.DataOutputStream

org.apache.hadoop.fs.azure.SyncableDataOutputStream

All Implemented Interfaces:

Closeable, DataOutput, Flushable, AutoCloseable, org.apache.hadoop.fs.StreamCapabilities, org.apache.hadoop.fs.Syncable

public class SyncableDataOutputStream
extends DataOutputStream
implements org.apache.hadoop.fs.Syncable, org.apache.hadoop.fs.StreamCapabilities

Support the Syncable interface on top of a DataOutputStream. This allows passing the sync/hflush/hsync calls through to the wrapped stream passed in to the constructor. This is required for HBase when wrapping a PageBlobOutputStream used as a write-ahead log.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.fs.StreamCapabilities

org.apache.hadoop.fs.StreamCapabilities.StreamCapability

Field Summary

Fields inherited from class java.io.DataOutputStream

written

Fields inherited from class java.io.FilterOutputStream

out

Fields inherited from interface org.apache.hadoop.fs.StreamCapabilities

DROPBEHIND, HFLUSH, HSYNC, READAHEAD, UNBUFFER

Constructor Summary

Constructors

Constructor and Description
SyncableDataOutputStream(OutputStream out)

Method Summary

Modifier and Type	Method and Description
OutputStream	getOutStream() Get a reference to the wrapped output stream.
boolean	hasCapability(String capability)
void	hflush()
void	hsync()

Methods inherited from class java.io.DataOutputStream

flush, size, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.io.FilterOutputStream

close, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write

Constructor Detail

SyncableDataOutputStream

public SyncableDataOutputStream(OutputStream out)

Method Detail

getOutStream

@InterfaceAudience.LimitedPrivate(value="HDFS")
public OutputStream getOutStream()

Get a reference to the wrapped output stream.

Returns:

the underlying output stream

hasCapability

public boolean hasCapability(String capability)

Specified by:

hasCapability in interface org.apache.hadoop.fs.StreamCapabilities

hflush

public void hflush()
            throws IOException

Specified by:

hflush in interface org.apache.hadoop.fs.Syncable

Throws:

IOException

hsync

public void hsync()
           throws IOException

Specified by:

hsync in interface org.apache.hadoop.fs.Syncable

Throws:

IOException