Package org.apache.bookkeeper.client

Class LedgerFragment

java.lang.Object

org.apache.bookkeeper.client.LedgerFragment

public class LedgerFragment
extends Object

Represents the entries of a segment of a ledger which are stored on subset of bookies in the segments bookie ensemble.

Used for checking and recovery

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	LedgerFragment.ReplicateType	ReplicateType.

Constructor Summary

Constructors

Constructor	Description
LedgerFragment(LedgerFragment lf, Set<Integer> subset)
LedgerFragment(LedgerHandle lh, long firstEntryId, long lastKnownEntryId, Set<Integer> bookieIndexes)

Method Summary

Modifier and Type	Method	Description
BookieId	getAddress(int bookieIndex)	Gets the failedBookie address.
Set<BookieId>	getAddresses()
Set<Integer>	getBookiesIndexes()	Gets the failedBookie index.
List<BookieId>	getEnsemble()	Gets the ensemble of fragment.
long	getFirstEntryId()
long	getFirstStoredEntryId()	Gets the first stored entry id of the fragment in failed bookies.
Long	getFirstStoredEntryId(int bookieIndex)	Get the first stored entry id of the fragment in the given failed bookies.
long	getLastKnownEntryId()
long	getLastStoredEntryId()	Gets the last stored entry id of the fragment in failed bookie.
Long	getLastStoredEntryId(int bookieIndex)	Get the last stored entry id of the fragment in the given failed bookie.
long	getLedgerId()
LedgerFragment.ReplicateType	getReplicateType()
boolean	isClosed()	Returns true, if and only if the ledger fragment will never be modified by any of the clients in future, otherwise false.
boolean	isStoredEntryId(long entryId, int bookieIndex)
void	setReplicateType(LedgerFragment.ReplicateType replicateType)
LedgerFragment	subset(Set<Integer> subset)	Return a ledger fragment contains subset of bookies.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

LedgerFragment

public LedgerFragment(LedgerHandle lh,
 long firstEntryId,
 long lastKnownEntryId,
 Set<Integer> bookieIndexes)

LedgerFragment

public LedgerFragment(LedgerFragment lf,
 Set<Integer> subset)

Method Details

subset

public LedgerFragment subset(Set<Integer> subset)

Return a ledger fragment contains subset of bookies.

Parameters:

subset - subset of bookies.

Returns:

ledger fragment contains subset of bookies

isClosed

public boolean isClosed()

Returns true, if and only if the ledger fragment will never be modified by any of the clients in future, otherwise false. i.e,

1. If ledger is in closed state, then no other clients can modify this fragment.
2. If ledger is not in closed state and the current fragment is not a last fragment, then no one will modify this fragment.

getLedgerId

public long getLedgerId()

getFirstEntryId

public long getFirstEntryId()

getLastKnownEntryId

public long getLastKnownEntryId()

getAddress

public BookieId getAddress(int bookieIndex)

Gets the failedBookie address.

getAddresses

public Set<BookieId> getAddresses()

getBookiesIndexes

public Set<Integer> getBookiesIndexes()

Gets the failedBookie index.

getFirstStoredEntryId

public long getFirstStoredEntryId()

Gets the first stored entry id of the fragment in failed bookies.

Returns:

entryId

getFirstStoredEntryId

public Long getFirstStoredEntryId(int bookieIndex)

Get the first stored entry id of the fragment in the given failed bookies.

Parameters:

bookieIndex - the bookie index in the ensemble.

Returns:

first stored entry id on the bookie.

getLastStoredEntryId

public long getLastStoredEntryId()

Gets the last stored entry id of the fragment in failed bookie.

Returns:

entryId

getLastStoredEntryId

public Long getLastStoredEntryId(int bookieIndex)

Get the last stored entry id of the fragment in the given failed bookie.

Parameters:

bookieIndex - the bookie index in the ensemble.

Returns:

first stored entry id on the bookie.

isStoredEntryId

public boolean isStoredEntryId(long entryId,
 int bookieIndex)

getEnsemble

public List<BookieId> getEnsemble()

Gets the ensemble of fragment.

Returns:

the ensemble for the segment which this fragment is a part of

getReplicateType

public LedgerFragment.ReplicateType getReplicateType()

setReplicateType

public void setReplicateType(LedgerFragment.ReplicateType replicateType)

toString

public String toString()

Overrides:

toString in class Object