Package org.apache.bookkeeper.client

Enum Class BookKeeper.DigestType

java.lang.Object

java.lang.Enum<BookKeeper.DigestType>

org.apache.bookkeeper.client.BookKeeper.DigestType

All Implemented Interfaces:

Serializable, Comparable<BookKeeper.DigestType>, Constable

Enclosing class:

BookKeeper

public static enum BookKeeper.DigestType
extends Enum<BookKeeper.DigestType>

There are 3 digest types that can be used for verification. The CRC32 is cheap to compute but does not protect against byzantine bookies (i.e., a bookie might report fake bytes and a matching CRC32). The MAC code is more expensive to compute, but is protected by a password, i.e., a bookie can't report fake bytes with a matching MAC unless it knows the password. The CRC32C, which use SSE processor instruction, has better performance than CRC32. Legacy DigestType for backward compatibility. If we want to add new DigestType, we should add it in here, client.api.DigestType and DigestType in DataFormats.proto. If the digest type is set/passed in as DUMMY, a dummy digest is added/checked. This DUMMY digest is mostly for test purposes or in situations/use-cases where digest is considered a overhead.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
CRC32
CRC32C
DUMMY
MAC

Method Summary

Modifier and Type	Method	Description
static BookKeeper.DigestType	fromApiDigestType(DigestType digestType)
DigestType	toApiDigestType()
static DataFormats.LedgerMetadataFormat.DigestType	toProtoDigestType(BookKeeper.DigestType digestType)
static BookKeeper.DigestType	valueOf(String name)	Returns the enum constant of this class with the specified name.
static BookKeeper.DigestType[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

MAC

public static final BookKeeper.DigestType MAC

CRC32

public static final BookKeeper.DigestType CRC32

CRC32C

public static final BookKeeper.DigestType CRC32C

DUMMY

public static final BookKeeper.DigestType DUMMY

Method Details

values

public static BookKeeper.DigestType[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static BookKeeper.DigestType valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

fromApiDigestType

public static BookKeeper.DigestType fromApiDigestType(DigestType digestType)

toProtoDigestType

public static DataFormats.LedgerMetadataFormat.DigestType toProtoDigestType(BookKeeper.DigestType digestType)

toApiDigestType

public DigestType toApiDigestType()