com.mongodb

类 ReadConcern

java.lang.Object

com.mongodb.ReadConcern

public final class ReadConcern
extends java.lang.Object

The readConcern option allows clients to choose a level of isolation for their reads.

从以下版本开始:

3.2

MongoDB documentation

Read Concern

Since server release

3.2

字段概要

字段

限定符和类型	字段和说明
static ReadConcern	DEFAULT Use the servers default read concern.
static ReadConcern	LOCAL Return the node's most recent copy of data.
static ReadConcern	MAJORITY Return the node's most recent copy of the data confirmed as having been written to a majority of the nodes.

构造器概要

构造器

构造器和说明
ReadConcern(ReadConcernLevel readConcernLevel) Construct a new read concern

方法概要

限定符和类型	方法和说明
BsonDocument	asDocument() Gets this read concern as a document.
boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isServerDefault()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT

public static final ReadConcern DEFAULT

Use the servers default read concern.

LOCAL

public static final ReadConcern 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 ReadConcern MAJORITY

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

构造器详细资料

ReadConcern

public ReadConcern(ReadConcernLevel readConcernLevel)

Construct a new read concern

参数:

readConcernLevel - the read concern level

方法详细资料

isServerDefault

public boolean isServerDefault()

返回:

true if this is the server default read concern

asDocument

public BsonDocument asDocument()

Gets this read concern as a document.

返回:

The read concern as a BsonDocument

equals

public boolean equals(java.lang.Object o)

覆盖:

equals 在类中 java.lang.Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 java.lang.Object