Package com.mongodb

Enum ReadConcernLevel

java.lang.Object

java.lang.Enum<ReadConcernLevel>

com.mongodb.ReadConcernLevel

All Implemented Interfaces:

Serializable, Comparable<ReadConcernLevel>

public enum ReadConcernLevel
extends Enum<ReadConcernLevel>

A read concern level allows clients to choose a level of isolation for their reads.

Since:

3.2

MongoDB documentation

Read Concern Levels

Since server release

3.2

Enum Constant Summary

Enum Constants

Enum Constant	Description
LINEARIZABLE	The linearizable read concern level.
LOCAL	The local read concern level.
MAJORITY	The majority read concern level.
SNAPSHOT	The snapshot read concern level.

Method Summary

Modifier and Type	Method	Description
static ReadConcernLevel	fromString(String readConcernLevel)	Returns the ReadConcern from the string read concern level.
String	getValue()
static ReadConcernLevel	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ReadConcernLevel[]	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, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

LOCAL

public static final ReadConcernLevel LOCAL

The local read concern level.

MAJORITY

public static final ReadConcernLevel MAJORITY

The majority read concern level.

LINEARIZABLE

public static final ReadConcernLevel LINEARIZABLE

The linearizable read concern level.

This read concern level is only compatible with ReadPreference.primary().

Since:

3.4

Since server release

3.4

SNAPSHOT

public static final ReadConcernLevel SNAPSHOT

The snapshot read concern level.

Since:

3.8

Since server release

4.0

Method Detail

values

public static ReadConcernLevel[] 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 (ReadConcernLevel c : ReadConcernLevel.values())
    System.out.println(c);

Returns:

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

valueOf

public static ReadConcernLevel 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

getValue

public String getValue()

Returns:

the String representation of the read concern level that the MongoDB server understands or null for the default

fromString

public static ReadConcernLevel fromString(String readConcernLevel)

Returns the ReadConcern from the string read concern level.

Parameters:

readConcernLevel - the read concern level string.

Returns:

the read concern