Package org.apache.cassandra.db

Enum Class ConsistencyLevel

java.lang.Object

java.lang.Enum<ConsistencyLevel>

org.apache.cassandra.db.ConsistencyLevel

All Implemented Interfaces:

Serializable, Comparable<ConsistencyLevel>, Constable

public enum ConsistencyLevel
extends Enum<ConsistencyLevel>

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
ALL
ANY
EACH_QUORUM
LOCAL_ONE
LOCAL_QUORUM
LOCAL_SERIAL
NODE_LOCAL
ONE
QUORUM
SERIAL
THREE
TWO

Field Summary

Fields

Modifier and Type	Field	Description
final int	code

Method Summary

Modifier and Type	Method	Description
int	blockFor(AbstractReplicationStrategy replicationStrategy)
int	blockForWrite(AbstractReplicationStrategy replicationStrategy, Endpoints<?> pending)
static com.carrotsearch.hppc.ObjectIntHashMap<String>	eachQuorumForRead(AbstractReplicationStrategy replicationStrategy)
static com.carrotsearch.hppc.ObjectIntHashMap<String>	eachQuorumForWrite(AbstractReplicationStrategy replicationStrategy, Endpoints<?> pendingWithDown)
static ConsistencyLevel	fromCode(int code)
static ConsistencyLevel	fromString(String str)
boolean	isDatacenterLocal()
boolean	isSerialConsistency()
static int	localQuorumFor(AbstractReplicationStrategy replicationStrategy, String dc)
static int	localQuorumForOurDc(AbstractReplicationStrategy replicationStrategy)
boolean	needsReconciliation()	With a replication factor greater than one, reads that contact more than one replica will require reconciliation of the individual replica results at the coordinator.
static int	quorumFor(AbstractReplicationStrategy replicationStrategy)
boolean	satisfies(ConsistencyLevel other, AbstractReplicationStrategy replicationStrategy)	Determine if this consistency level meets or exceeds the consistency requirements of the given cl for the given keyspace WARNING: this is not locality aware; you cannot safely use this with mixed locality consistency levels (e.g.
void	validateCounterForWrite(TableMetadata metadata)
void	validateForCas()
void	validateForCasCommit(AbstractReplicationStrategy replicationStrategy)
void	validateForRead()
void	validateForWrite()
static ConsistencyLevel	valueOf(String name)	Returns the enum constant of this class with the specified name.
static ConsistencyLevel[]	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

ANY

public static final ConsistencyLevel ANY

ONE

public static final ConsistencyLevel ONE

TWO

public static final ConsistencyLevel TWO

THREE

public static final ConsistencyLevel THREE

QUORUM

public static final ConsistencyLevel QUORUM

ALL

public static final ConsistencyLevel ALL

LOCAL_QUORUM

public static final ConsistencyLevel LOCAL_QUORUM

EACH_QUORUM

public static final ConsistencyLevel EACH_QUORUM

SERIAL

public static final ConsistencyLevel SERIAL

LOCAL_SERIAL

public static final ConsistencyLevel LOCAL_SERIAL

LOCAL_ONE

public static final ConsistencyLevel LOCAL_ONE

NODE_LOCAL

public static final ConsistencyLevel NODE_LOCAL

Field Details

code

public final int code

Method Details

values

public static ConsistencyLevel[] 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 ConsistencyLevel 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

fromCode

public static ConsistencyLevel fromCode(int code)

fromString

public static ConsistencyLevel fromString(String str)

quorumFor

public static int quorumFor(AbstractReplicationStrategy replicationStrategy)

localQuorumFor

public static int localQuorumFor(AbstractReplicationStrategy replicationStrategy,
 String dc)

localQuorumForOurDc

public static int localQuorumForOurDc(AbstractReplicationStrategy replicationStrategy)

eachQuorumForRead

public static com.carrotsearch.hppc.ObjectIntHashMap<String> eachQuorumForRead(AbstractReplicationStrategy replicationStrategy)

eachQuorumForWrite

public static com.carrotsearch.hppc.ObjectIntHashMap<String> eachQuorumForWrite(AbstractReplicationStrategy replicationStrategy,
 Endpoints<?> pendingWithDown)

blockFor

public int blockFor(AbstractReplicationStrategy replicationStrategy)

blockForWrite

public int blockForWrite(AbstractReplicationStrategy replicationStrategy,
 Endpoints<?> pending)

satisfies

public boolean satisfies(ConsistencyLevel other,
 AbstractReplicationStrategy replicationStrategy)

Determine if this consistency level meets or exceeds the consistency requirements of the given cl for the given keyspace WARNING: this is not locality aware; you cannot safely use this with mixed locality consistency levels (e.g. LOCAL_QUORUM and QUORUM)

isDatacenterLocal

public boolean isDatacenterLocal()

validateForRead

public void validateForRead()
                     throws InvalidRequestException

Throws:

InvalidRequestException

validateForWrite

public void validateForWrite()
                      throws InvalidRequestException

Throws:

InvalidRequestException

validateForCasCommit

public void validateForCasCommit(AbstractReplicationStrategy replicationStrategy)
                          throws InvalidRequestException

Throws:

InvalidRequestException

validateForCas

public void validateForCas()
                    throws InvalidRequestException

Throws:

InvalidRequestException

isSerialConsistency

public boolean isSerialConsistency()

validateCounterForWrite

public void validateCounterForWrite(TableMetadata metadata)
                             throws InvalidRequestException

Throws:

InvalidRequestException

needsReconciliation

public boolean needsReconciliation()

With a replication factor greater than one, reads that contact more than one replica will require reconciliation of the individual replica results at the coordinator.

Returns:

true if reads at this consistency level require merging at the coordinator