Package com.azure.data.cosmos

Enum ConsistencyLevel

java.lang.Object

java.lang.Enum<ConsistencyLevel>

com.azure.data.cosmos.ConsistencyLevel

All Implemented Interfaces:

Serializable, Comparable<ConsistencyLevel>

public enum ConsistencyLevel
extends Enum<ConsistencyLevel>

Represents the consistency levels supported for Cosmos DB client operations in the Azure Cosmos DB database service.

The requested ConsistencyLevel must match or be weaker than that provisioned for the database account. Consistency levels by order of strength are STRONG, BOUNDED_STALENESS, SESSION and EVENTUAL.

Enum Constant Summary

Enum Constants

Enum Constant	Description
BOUNDED_STALENESS	Bounded Staleness guarantees that reads are not too out-of-date.
CONSISTENT_PREFIX	CONSISTENT_PREFIX Consistency guarantees that reads will return some prefix of all writes with no gaps.
EVENTUAL	EVENTUAL Consistency guarantees that reads will return a subset of writes.
SESSION	SESSION Consistency guarantees monotonic reads (you never read old data, then new, then old again), monotonic writes (writes are ordered) and read your writes (your writes are immediately visible to your reads) within any single session.
STRONG	STRONG Consistency guarantees that read operations always return the value that was last written.

Method Summary

Modifier and Type	Method	Description
String	toString()
static ConsistencyLevel	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ConsistencyLevel[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

STRONG

public static final ConsistencyLevel STRONG

STRONG Consistency guarantees that read operations always return the value that was last written.

BOUNDED_STALENESS

public static final ConsistencyLevel BOUNDED_STALENESS

Bounded Staleness guarantees that reads are not too out-of-date. This can be configured based on number of operations (MaxStalenessPrefix) or time (MaxStalenessIntervalInSeconds)

SESSION

public static final ConsistencyLevel SESSION

SESSION Consistency guarantees monotonic reads (you never read old data, then new, then old again), monotonic writes (writes are ordered) and read your writes (your writes are immediately visible to your reads) within any single session.

EVENTUAL

public static final ConsistencyLevel EVENTUAL

EVENTUAL Consistency guarantees that reads will return a subset of writes. ALL writes will be eventually be available for reads.

CONSISTENT_PREFIX

public static final ConsistencyLevel CONSISTENT_PREFIX

CONSISTENT_PREFIX Consistency guarantees that reads will return some prefix of all writes with no gaps. ALL writes will be eventually be available for reads.

Method Detail

values

public static ConsistencyLevel[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ConsistencyLevel c : ConsistencyLevel.values())
    System.out.println(c);

Returns:

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

valueOf

public static ConsistencyLevel valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null

toString

public String toString()

Overrides:

toString in class Enum<ConsistencyLevel>