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>

The readConcern option allows clients to choose a level of isolation for their reads. The WiredTiger storage engine, introduces the readConcern option for replica sets and replica set shards. Allowing clients to choose a level of isolation for their reads.

Since:

3.2

MongoDB documentation

Read Concern

Since server release

3.2

Enum Constant Summary

Enum Constants

Enum Constant and Description
LOCAL Return the node's most recent copy of data.
MAJORITY Return the node's most recent copy of the data confirmed as having been written to a majority of the nodes.

Method Summary

Modifier and Type	Method and 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

Return the node's most recent copy of data. Provides no guarantee that the data has been written to a majority of the nodes.

MAJORITY

public static final ReadConcernLevel MAJORITY

Return the node's most recent copy of the data confirmed as having been written to a majority of the nodes.

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