org.unict.ing.pds.dhtdb.datamanager.lightBeans

Class LookupSessionBean

java.lang.Object

org.unict.ing.pds.dhtdb.datamanager.lightBeans.LookupSessionBean

All Implemented Interfaces:

LookupSessionBeanLocal

public class LookupSessionBean
extends Object
implements LookupSessionBeanLocal

This Bean is responsible for the Lookup operations over LIGHT

Field Summary

Fields

Modifier and Type	Field and Description
private DataManagerChordSessionBeanLocal	dataManagerChordSessionBean
private LightSessionBeanLocal	lightSessionBean

Constructor Summary

Constructors

Constructor and Description
LookupSessionBean()

Method Summary

Modifier and Type	Method and Description
Bucket	lightLabelLookup(long timestamp) An implementation of the Algorithm 1 provided in LIGHT paper It takes a timestamp and return the associated Bucket, if it exists, or null
List<GenericValue>	lightLookupAndGetDataBucket(Label bucketLabel) Useful method to get all the datas referenced by the Bucket with label bucketLabel
List<GenericValue>	lightLookupAndGetDataBucket(long timestamp) Useful method to get all the datas referenced by the Bucket that has a Range containing the timestamp given
Bucket	lookupBucket(Label l) Get a Bucket in the Chord network and return that one if it exists
Label	lowestCommonAncestor(Range range) Get the lowest common ancestor between the Label (s) associated with the upperBound and the lowerBound of the Range given

Methods inherited from class java.lang.Object

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

Field Detail

lightSessionBean

private LightSessionBeanLocal lightSessionBean

dataManagerChordSessionBean

private DataManagerChordSessionBeanLocal dataManagerChordSessionBean

Constructor Detail

LookupSessionBean

public LookupSessionBean()

Method Detail

lookupBucket

public Bucket lookupBucket(Label l)

Get a Bucket in the Chord network and return that one if it exists

Specified by:

lookupBucket in interface LookupSessionBeanLocal

Parameters:

l - |

Returns:

|

lightLabelLookup

public Bucket lightLabelLookup(long timestamp)

An implementation of the Algorithm 1 provided in LIGHT paper It takes a timestamp and return the associated Bucket, if it exists, or null

Specified by:

lightLabelLookup in interface LookupSessionBeanLocal

Parameters:

timestamp - |

Returns:

|

lightLookupAndGetDataBucket

public List<GenericValue> lightLookupAndGetDataBucket(long timestamp)

Useful method to get all the datas referenced by the Bucket that has a Range containing the timestamp given

Specified by:

lightLookupAndGetDataBucket in interface LookupSessionBeanLocal

Parameters:

timestamp - |

Returns:

| the datas referenced by the Bucket associated with the timestamp given

lightLookupAndGetDataBucket

public List<GenericValue> lightLookupAndGetDataBucket(Label bucketLabel)

Useful method to get all the datas referenced by the Bucket with label bucketLabel

Specified by:

lightLookupAndGetDataBucket in interface LookupSessionBeanLocal

Parameters:

bucketLabel - |

Returns:

| the List of GenericValue referenced by the bucket

lowestCommonAncestor

public Label lowestCommonAncestor(Range range)

Get the lowest common ancestor between the Label (s) associated with the upperBound and the lowerBound of the Range given

Specified by:

lowestCommonAncestor in interface LookupSessionBeanLocal

Parameters:

range - |

Returns:

| a Label corresponding to the lowest common ancestor