Package org.apache.bookkeeper.client

Class LedgerMetadataImpl

java.lang.Object

org.apache.bookkeeper.client.LedgerMetadataImpl

All Implemented Interfaces:

LedgerMetadata

class LedgerMetadataImpl
extends Object
implements LedgerMetadata

This class encapsulates all the ledger metadata that is persistently stored in metadata store.

It provides parsing and serialization methods of such metadata.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.bookkeeper.client.api.LedgerMetadata

LedgerMetadata.State

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final org.slf4j.Logger	LOG
(package private) final boolean	storeCtime

Constructor Summary

Constructors

Constructor	Description
LedgerMetadataImpl(long ledgerId, int metadataFormatVersion, int ensembleSize, int writeQuorumSize, int ackQuorumSize, LedgerMetadata.State state, Optional<Long> lastEntryId, Optional<Long> length, Map<Long,List<BookieId>> ensembles, Optional<DigestType> digestType, Optional<byte[]> password, long ctime, boolean storeCtime, long cToken, Map<String,byte[]> customMetadata)

Method Summary

Modifier and Type	Method	Description
protected boolean	canEqual(Object other)
boolean	equals(Object o)
int	getAckQuorumSize()	Returns the ack quorum size of this ledger.
NavigableMap<Long,? extends List<BookieId>>	getAllEnsembles()	Returns all the ensembles of this ledger.
long	getCtime()	Returns the creation timestamp of this ledger.
long	getCToken()	Get the unique creator token of the Ledger.
Map<String,byte[]>	getCustomMetadata()	Returns the custom metadata stored with the ledgers.
DigestType	getDigestType()	Returns the digest type used by this ledger.
List<BookieId>	getEnsembleAt(long entryId)	Returns the ensemble at the given entryId.
int	getEnsembleSize()	Returns the ensemble size of this ledger.
long	getLastEntryId()	Returns the last entry id of this ledger.
long	getLedgerId()	Returns the id of this ledger.
long	getLength()	Returns the length of this ledger.
int	getMetadataFormatVersion()	Get the format version which should be used to serialize the metadata.
byte[]	getPassword()	Get the password for the ledger.
LedgerMetadata.State	getState()	Returns the state of the metadata.
int	getWriteQuorumSize()	Returns the write quorum size of this ledger.
int	hashCode()
boolean	hasPassword()	In versions 4.1.0 and below, the digest type and password were not stored in the metadata.
boolean	isClosed()	Returns whether the ledger is sealed or not.
(package private) boolean	shouldStoreCtime()
String	toSafeString()	Returns a string representation of this LedgerMetadata object by filtering out the password field.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

LOG

static final org.slf4j.Logger LOG

storeCtime

final boolean storeCtime

Constructor Details

LedgerMetadataImpl

LedgerMetadataImpl(long ledgerId,
 int metadataFormatVersion,
 int ensembleSize,
 int writeQuorumSize,
 int ackQuorumSize,
 LedgerMetadata.State state,
 Optional<Long> lastEntryId,
 Optional<Long> length,
 Map<Long,List<BookieId>> ensembles,
 Optional<DigestType> digestType,
 Optional<byte[]> password,
 long ctime,
 boolean storeCtime,
 long cToken,
 Map<String,byte[]> customMetadata)

Method Details

getLedgerId

public long getLedgerId()

Description copied from interface: LedgerMetadata

Returns the id of this ledger.

Specified by:

getLedgerId in interface LedgerMetadata

Returns:

the id of this ledger.

getAllEnsembles

public NavigableMap<Long,? extends List<BookieId>> getAllEnsembles()

Description copied from interface: LedgerMetadata

Returns all the ensembles of this ledger.

Specified by:

getAllEnsembles in interface LedgerMetadata

Returns:

all the ensembles of this ledger.

getEnsembleSize

public int getEnsembleSize()

Description copied from interface: LedgerMetadata

Returns the ensemble size of this ledger.

Specified by:

getEnsembleSize in interface LedgerMetadata

Returns:

the ensemble size of this ledger.

getWriteQuorumSize

public int getWriteQuorumSize()

Description copied from interface: LedgerMetadata

Returns the write quorum size of this ledger.

Specified by:

getWriteQuorumSize in interface LedgerMetadata

Returns:

the write quorum size of this ledger.

getAckQuorumSize

public int getAckQuorumSize()

Description copied from interface: LedgerMetadata

Returns the ack quorum size of this ledger.

Specified by:

getAckQuorumSize in interface LedgerMetadata

Returns:

the ack quorum size of this ledger.

getCtime

public long getCtime()

Description copied from interface: LedgerMetadata

Returns the creation timestamp of this ledger.

Specified by:

getCtime in interface LedgerMetadata

Returns:

the creation timestamp of this ledger.

hasPassword

public boolean hasPassword()

In versions 4.1.0 and below, the digest type and password were not stored in the metadata.

Specified by:

hasPassword in interface LedgerMetadata

Returns:

whether the password has been stored in the metadata

getPassword

public byte[] getPassword()

Description copied from interface: LedgerMetadata

Get the password for the ledger. For ledgers created with version 4.1.0 or older, an empty byte array is returned.

Specified by:

getPassword in interface LedgerMetadata

Returns:

the password for the ledger.

getDigestType

public DigestType getDigestType()

Description copied from interface: LedgerMetadata

Returns the digest type used by this ledger. May return null if the ledger was created with version 4.1.0 or below.

Specified by:

getDigestType in interface LedgerMetadata

Returns:

the digest type used by this ledger.

getLastEntryId

public long getLastEntryId()

Description copied from interface: LedgerMetadata

Returns the last entry id of this ledger.

If this ledger is not sealed LedgerMetadata.isClosed(), it returns -1L.

Specified by:

getLastEntryId in interface LedgerMetadata

Returns:

the last entry id of this ledger if it is sealed, otherwise -1.

getLength

public long getLength()

Description copied from interface: LedgerMetadata

Returns the length of this ledger.

If this ledger is not sealed LedgerMetadata.isClosed(), it returns 0.

Specified by:

getLength in interface LedgerMetadata

Returns:

the length of this ledger if it is sealed, otherwise 0.

isClosed

public boolean isClosed()

Description copied from interface: LedgerMetadata

Returns whether the ledger is sealed or not.

Specified by:

isClosed in interface LedgerMetadata

Returns:

true if the ledger is sealed, otherwise false.

getState

public LedgerMetadata.State getState()

Description copied from interface: LedgerMetadata

Returns the state of the metadata.

Specified by:

getState in interface LedgerMetadata

Returns:

the state of the metadata.

getEnsembleAt

public List<BookieId> getEnsembleAt(long entryId)

Description copied from interface: LedgerMetadata

Returns the ensemble at the given entryId.

Specified by:

getEnsembleAt in interface LedgerMetadata

Parameters:

entryId - the entry id to retrieve its ensemble information

Returns:

the ensemble which contains the given entryId.

getCustomMetadata

public Map<String,byte[]> getCustomMetadata()

Description copied from interface: LedgerMetadata

Returns the custom metadata stored with the ledgers.

Specified by:

getCustomMetadata in interface LedgerMetadata

Returns:

the custom metadata stored with the ledgers.

toString

public String toString()

Overrides:

toString in class Object

toSafeString

public String toSafeString()

Returns a string representation of this LedgerMetadata object by filtering out the password field.

Specified by:

toSafeString in interface LedgerMetadata

Returns:

a string representation of the object without password field in it.

getMetadataFormatVersion

public int getMetadataFormatVersion()

Description copied from interface: LedgerMetadata

Get the format version which should be used to serialize the metadata.

Specified by:

getMetadataFormatVersion in interface LedgerMetadata

Returns:

the format version.

shouldStoreCtime

boolean shouldStoreCtime()

getCToken

public long getCToken()

Description copied from interface: LedgerMetadata

Get the unique creator token of the Ledger.

Specified by:

getCToken in interface LedgerMetadata

Returns:

the creator token

equals

public boolean equals(Object o)

Overrides:

equals in class Object

canEqual

protected boolean canEqual(Object other)

hashCode

public int hashCode()

Overrides:

hashCode in class Object