Package oracle.nosql.driver

Class Consistency

java.lang.Object

oracle.nosql.driver.Consistency

public class Consistency
extends Object

Consistency is used to provide consistency guarantees for read operations.

ABSOLUTE consistency may be specified to guarantee that current values are read. EVENTUAL consistency means that the values read may be very slightly out of date. ABSOLUTE consistency results in higher cost, consuming twice the number of read units for the same data relative to EVENTUAL consistency, and should only be used when required.

It is possible to set a default Consistency for a NoSQLHandle instance by using NoSQLHandleConfig.setConsistency(oracle.nosql.driver.Consistency). If no Consistency is specified in an operation and there is no default value, EVENTUAL is used.

Consistency can be specified as an optional argument to all read operations.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Consistency.Type	Consistency types

Field Summary

Fields

Modifier and Type	Field	Description
static Consistency	ABSOLUTE	constant for ABSOLUTE Consistency
static Consistency	EVENTUAL	constant for EVENTUAL Consistency

Method Summary

Modifier and Type	Method	Description
Consistency.Type	getType()	Returns the Consistency.Type of Consistency
boolean	isAbsolute()	Returns true if this is Consistency.ABSOLUTE
boolean	isEventual()	Returns true if this is Consistency.EVENTUAL

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

ABSOLUTE

public static Consistency ABSOLUTE

constant for ABSOLUTE Consistency

EVENTUAL

public static Consistency EVENTUAL

constant for EVENTUAL Consistency

Method Details

getType

public Consistency.Type getType()

Returns the Consistency.Type of Consistency

Returns:

the type

isAbsolute

public boolean isAbsolute()

Returns true if this is Consistency.ABSOLUTE

Returns:

true if this instance represents ABSOLUTE Consistency

isEventual

public boolean isEventual()

Returns true if this is Consistency.EVENTUAL

Returns:

true if this instance represents EVENTUAL Consistency