org.apache.hadoop.hbase.regionserver.wal
Class HLogKey

java.lang.Object
  org.apache.hadoop.hbase.regionserver.wal.HLogKey

All Implemented Interfaces:

java.lang.Comparable<HLogKey>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<HLogKey>

public class HLogKey
extends java.lang.Object
implements org.apache.hadoop.io.WritableComparable<HLogKey>

A Key for an entry in the change log. The log intermingles edits to many tables and rows, so each log entry identifies the appropriate table and row. Within a table and row, they're also sorted.

Some Transactional edits (START, COMMIT, ABORT) will not have an associated row.

Constructor Summary

HLogKey()
Writable Consructor -- Do not use.

HLogKey(byte[] encodedRegionName, byte[] tablename, long logSeqNum, long now)
Create the log key! We maintain the tablename mainly for debugging purposes.

Method Summary

int	compareTo(HLogKey o)
boolean	equals(java.lang.Object obj)
byte	getClusterId() Get the id of the original cluster
byte[]	getEncodedRegionName()
long	getLogSeqNum()
byte[]	getTablename()
long	getWriteTime()
int	hashCode()
void	readFields(java.io.DataInput in)
void	setClusterId(byte clusterId) Set the cluster id of this key
java.lang.String	toString()
void	write(java.io.DataOutput out)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

HLogKey

public HLogKey()

Writable Consructor -- Do not use.

HLogKey

public HLogKey(byte[] encodedRegionName,
               byte[] tablename,
               long logSeqNum,
               long now)

Create the log key! We maintain the tablename mainly for debugging purposes. A regionName is always a sub-table object.

Parameters:

encodedRegionName - Encoded name of the region as returned by HRegionInfo#getEncodedNameAsBytes().

tablename - - name of table

logSeqNum - - log sequence number

now - Time at which this edit was written.

Method Detail

getEncodedRegionName

public byte[] getEncodedRegionName()

Returns:

encoded region name

getTablename

public byte[] getTablename()

Returns:

table name

getLogSeqNum

public long getLogSeqNum()

Returns:

log sequence number

getWriteTime

public long getWriteTime()

Returns:

the write time

getClusterId

public byte getClusterId()

Get the id of the original cluster

Returns:

Cluster id.

setClusterId

public void setClusterId(byte clusterId)

Set the cluster id of this key

Parameters:

clusterId -

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

compareTo

public int compareTo(HLogKey o)

Specified by:

compareTo in interface java.lang.Comparable<HLogKey>

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

java.io.IOException

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

java.io.IOException