org.apache.hadoop.hbase.regionserver

Class TimeRangeTracker

java.lang.Object

org.apache.hadoop.hbase.regionserver.TimeRangeTracker

All Implemented Interfaces:

org.apache.hadoop.io.Writable

@InterfaceAudience.Private
public class TimeRangeTracker
extends Object
implements org.apache.hadoop.io.Writable

Stores the minimum and maximum timestamp values (both are inclusive). Can be used to find if any given time range overlaps with its time range MemStores use this class to track its minimum and maximum timestamps. When writing StoreFiles, this information is stored in meta blocks and used at read time to match against the required TimeRange.

Constructor Summary

Constructors

Constructor and Description
TimeRangeTracker() Default constructor.
TimeRangeTracker(long minimumTimestamp, long maximumTimestamp)
TimeRangeTracker(TimeRangeTracker trt) Copy Constructor

Method Summary

Methods

Modifier and Type	Method and Description
long	getMaximumTimestamp()
long	getMinimumTimestamp()
boolean	includesTimeRange(TimeRange tr) Check if the range has any overlap with TimeRange
void	includeTimestamp(Cell cell) Update the current TimestampRange to include the timestamp from Cell If the Key is of type DeleteColumn or DeleteFamily, it includes the entire time range from 0 to timestamp of the key.
void	readFields(DataInput in)
String	toString()
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeRangeTracker

public TimeRangeTracker()

Default constructor. Initializes TimeRange to be null

TimeRangeTracker

public TimeRangeTracker(TimeRangeTracker trt)

Copy Constructor

Parameters:

trt - source TimeRangeTracker

TimeRangeTracker

public TimeRangeTracker(long minimumTimestamp,
                long maximumTimestamp)

Method Detail

includeTimestamp

public void includeTimestamp(Cell cell)

Update the current TimestampRange to include the timestamp from Cell If the Key is of type DeleteColumn or DeleteFamily, it includes the entire time range from 0 to timestamp of the key.

Parameters:

cell - the Cell to include

includesTimeRange

public boolean includesTimeRange(TimeRange tr)

Check if the range has any overlap with TimeRange

Parameters:

tr - TimeRange

Returns:

True if there is overlap, false otherwise

getMinimumTimestamp

public long getMinimumTimestamp()

Returns:

the minimumTimestamp

getMaximumTimestamp

public long getMaximumTimestamp()

Returns:

the maximumTimestamp

write

public void write(DataOutput out)
           throws IOException

Specified by:

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

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

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

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object