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org.apache.lens.cube.metadata.timeline
Class RangesPartitionTimeline

java.lang.Object
  org.apache.lens.cube.metadata.timeline.PartitionTimeline
      org.apache.lens.cube.metadata.timeline.RangesPartitionTimeline

All Implemented Interfaces:

Iterable<TimePartition>

public class RangesPartitionTimeline
extends PartitionTimeline

One implementation of PartitionTimeline that stores ranges of partition presence, Basically a list of tuples each tuple represents a range of presence. range is of the form [from, end) i.e. including the first element and excluding the second element of the tuple

Constructor Summary

RangesPartitionTimeline(String storageTableName, UpdatePeriod updatePeriod, String partCol)

Method Summary

boolean	add(TimePartition partition) Add partition to timeline
boolean	drop(TimePartition toDrop) drop partition.
boolean	exists(TimePartition toCheck) Checks partition existance
boolean	initFromProperties(Map<String,String> properties) deserialize member variables from given map
boolean	isConsistent() whether timeline is in consistent state
boolean	isEmpty() Whether No partitions have been registered
Iterator<TimePartition>	iterator()
TimePartition	latest() latest partition.
Map<String,String>	toProperties() serialize member objects as map

Methods inherited from class org.apache.lens.cube.metadata.timeline.PartitionTimeline

add, addForBatchAddition, commitBatchAdditions, getLatestDate, init, updateTableParams

Methods inherited from class java.lang.Object

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

Constructor Detail

RangesPartitionTimeline

public RangesPartitionTimeline(String storageTableName,
                               UpdatePeriod updatePeriod,
                               String partCol)

Method Detail

add

public boolean add(TimePartition partition)
            throws LensException

Description copied from class: PartitionTimeline

Add partition to timeline

Specified by:

add in class PartitionTimeline

Returns:

whether add was successful

Throws:

LensException

drop

public boolean drop(TimePartition toDrop)
             throws LensException

Description copied from class: PartitionTimeline

drop partition.

Specified by:

drop in class PartitionTimeline

Returns:

whether drop was successful

Throws:

LensException

latest

public TimePartition latest()

Description copied from class: PartitionTimeline

latest partition. will be null if no partitions exist.

Specified by:

latest in class PartitionTimeline

Returns:

toProperties

public Map<String,String> toProperties()

Description copied from class: PartitionTimeline

serialize member objects as map

Specified by:

toProperties in class PartitionTimeline

Returns:

initFromProperties

public boolean initFromProperties(Map<String,String> properties)
                           throws LensException

Description copied from class: PartitionTimeline

deserialize member variables from given map

Specified by:

initFromProperties in class PartitionTimeline

Returns:

true if after deserializing, the timeline is in consistent state

Throws:

LensException

See Also:

PartitionTimeline.isConsistent()

isEmpty

public boolean isEmpty()

Description copied from class: PartitionTimeline

Whether No partitions have been registered

Specified by:

isEmpty in class PartitionTimeline

Returns:

isConsistent

public boolean isConsistent()

Description copied from class: PartitionTimeline

whether timeline is in consistent state

Specified by:

isConsistent in class PartitionTimeline

Returns:

exists

public boolean exists(TimePartition toCheck)

Description copied from class: PartitionTimeline

Checks partition existance

Specified by:

exists in class PartitionTimeline

Returns:

iterator

public Iterator<TimePartition> iterator()