com.sequoiadb.base

类 Domain

java.lang.Object

com.sequoiadb.base.Domain

public class Domain
extends Object

Domain of SequoiaDB.

方法概要

限定符和类型	方法和说明
void	addGroups(BSONObject options) Alter current domain to add groups
void	alterDomain(BSONObject options) Alter current domain.
String	getName()
Sequoiadb	getSequoiadb()
DBCursor	listCLInDomain() List all the collections in current domain.
DBCursor	listCSInDomain() List all the collection spaces in current domain.
void	removeGroups(BSONObject options) Alter current domain to remove groups
void	setAttributes(BSONObject options) Alter current domain to set attributes.
void	setGroups(BSONObject options) Alter current domain to set groups

从类继承的方法 java.lang.Object

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

方法详细资料

addGroups

public void addGroups(BSONObject options)
               throws BaseException

Alter current domain to add groups

参数:

options - the options user wants to alter:

• Groups: The list of replica groups' names which the domain is going to add.

抛出:

BaseException - If error happens.

alterDomain

public void alterDomain(BSONObject options)
                 throws BaseException

Alter current domain.

参数:

options - the options user wants to alter:

• Groups: The list of replica groups' names which the domain is going to contain. eg: { "Groups": [ "group1", "group2", "group3" ] }, it means that domain changes to contain "group1", "group2" and "group3". We can add or remove groups in current domain. However, if a group has data in it, remove it out of domain will be failing.
• AutoSplit: Alter current domain to have the ability of automatically split or not. If this option is set to be true, while creating collection(ShardingType is "hash") in this domain, the data of this collection will be split(hash split) into all the groups in this domain automatically. However, it won't automatically split data into those groups which were add into this domain later. eg: { "Groups": [ "group1", "group2", "group3" ], "AutoSplit: true" }

抛出:

BaseException - If error happens.

getName

public String getName()

返回:

The name of current domain

getSequoiadb

public Sequoiadb getSequoiadb()

返回:

Sequoiadb The Sequoiadb instance of current domain belongs to.

listCLInDomain

public DBCursor listCLInDomain()
                        throws BaseException

List all the collections in current domain.

返回:

the cursor of result

抛出:

BaseException - If error happens.

listCSInDomain

public DBCursor listCSInDomain()
                        throws BaseException

List all the collection spaces in current domain.

返回:

the cursor of result

抛出:

BaseException - If error happens.

removeGroups

public void removeGroups(BSONObject options)
                  throws BaseException

Alter current domain to remove groups

参数:

options - the options user wants to alter:

• Groups: The list of replica groups' names which the domain is going to remove. If a group has data in it, remove it out of domain will be failing.

抛出:

BaseException - If error happens.

setAttributes

public void setAttributes(BSONObject options)
                   throws BaseException

Alter current domain to set attributes.

参数:

options - the options user wants to alter:

• Groups: The list of replica groups' names which the domain is going to contain. eg: { "Groups": [ "group1", "group2", "group3" ] }, it means that domain changes to contain "group1", "group2" and "group3". We can add or remove groups in current domain. However, if a group has data in it, remove it out of domain will be failing.
• AutoSplit: Alter current domain to have the ability of automatically split or not. If this option is set to be true, while creating collection(ShardingType is "hash") in this domain, the data of this collection will be split(hash split) into all the groups in this domain automatically. However, it won't automatically split data into those groups which were add into this domain later. eg: { "Groups": [ "group1", "group2", "group3" ], "AutoSplit: true" }

抛出:

BaseException - If error happens.

setGroups

public void setGroups(BSONObject options)
               throws BaseException

Alter current domain to set groups

参数:

options - the options user wants to alter:

• Groups: The list of replica groups' names which the domain is going to contain.

抛出:

BaseException - If error happens.