org.pinus4j.datalayer.jdbc

Class AbstractJdbcQuery

java.lang.Object

org.pinus4j.datalayer.jdbc.AbstractJdbcQuery

All Implemented Interfaces:

IDataQuery

Direct Known Subclasses:

AbstractRecordIterator, GlobalJdbcMasterQueryImpl, GlobalJdbcSlaveQueryImpl, ShardingJdbcMasterQueryImpl, ShardingJdbcSlaveQueryImpl

public abstract class AbstractJdbcQuery
extends Object
implements IDataQuery

分库分表查询抽象类. 此类封装了分库分表查询的公共操作. 子类可以针对主库、从库实现相关的查询.

Author:

duanbn

Field Summary

Fields

Modifier and Type	Field and Description
protected IDBCluster	dbCluster 数据库集群引用.
protected IPrimaryCache	primaryCache 一级缓存.
protected ISecondCache	secondCache 二级缓存.

Constructor Summary

Constructors

Constructor and Description
AbstractJdbcQuery()

Method Summary

Modifier and Type	Method and Description
private <T> Map<Number,T>	_getPkValues(List<T> entities) 获取列表的主键.
private <T> T	_selectByPk(DB db, Number pk, Class<T> clazz) 一个主分库分表, 根据主键查询.
private <T> List<T>	_selectByPks(DB db, Class<T> clazz, Number[] pks) 一个主分库分表, 根据多个主键查询.
private Number	_selectCount(DB db, Class<?> clazz) 获取分库分表记录总数.
private <T> T	_selectGlobalByPk(Connection conn, Number pk, Class<T> clazz)
private <T> List<T>	_selectGlobalByPks(Connection conn, Class<T> clazz, Number[] pks)
private <T> Map<Number,T>	_selectGlobalByPksWithMap(Connection conn, Class<T> clazz, Number[] pks)
private Number	_selectGlobalCount(Connection conn, Class<?> clazz) 获取全局表的count数
IDBCluster	getDBCluster() get db cluster.
IPrimaryCache	getPrimaryCache() get second cache.
ISecondCache	getSecondCache() get second cache.
protected boolean	isCacheAvailable(Class<?> clazz, boolean useCache) 判断一级缓存是否可用
protected boolean	isSecondCacheAvailable(Class<?> clazz, boolean useCache) 判断二级缓存是否可用
protected <T> List<T>	selectByPksWithCache(DB db, Class<T> clazz, Number[] pks, boolean useCache) findByPks加入缓存
private <T> Map<Number,T>	selectByPksWithMap(DB db, Class<T> clazz, Number[] pks)
protected <T> T	selectByPkWithCache(Connection conn, String clusterName, Number pk, Class<T> clazz, boolean useCache)
protected <T> T	selectByPkWithCache(DB db, Number pk, Class<T> clazz, boolean useCache) findByPk加入缓存.
protected <T> List<T>	selectByQuery(DB db, IQuery query, Class<T> clazz) 根据查询条件对象进行查询.
protected List<Map<String,Object>>	selectBySql(DB db, SQL sql) 一个主分库分表, 根据条件查询.
protected Number	selectCount(DB db, Class<?> clazz, IQuery query) 根据查询条件查询记录数.
protected Number	selectCountWithCache(DB db, Class<?> clazz, boolean useCache) getCount加入缓存
protected <T> List<T>	selectGlobalByPksWithCache(Connection conn, String clusterName, Class<T> clazz, Number[] pks, boolean useCache)
protected <T> List<T>	selectGlobalByQuery(Connection conn, IQuery query, Class<T> clazz)
protected List<Map<String,Object>>	selectGlobalBySql(Connection conn, SQL sql)
protected Number	selectGlobalCount(IQuery query, DBInfo dbConnInfo, String clusterName, Class<?> clazz)
protected Number	selectGlobalCountWithCache(DBInfo dbConnInfo, String clusterName, Class<?> clazz, boolean useCache) 带缓存的获取全局表count
protected <T> Number[]	selectGlobalPksByQuery(Connection conn, IQuery query, Class<T> clazz)
protected <T> Number[]	selectPksByQuery(DB db, IQuery query, Class<T> clazz) 根据查询条件查询主键.
void	setDBCluster(IDBCluster dbCluster) set db cluster.
void	setPrimaryCache(IPrimaryCache primaryCache) set primary cache.
void	setSecondCache(ISecondCache secondCache) set second cache.

Methods inherited from class java.lang.Object

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

Field Detail

dbCluster

protected IDBCluster dbCluster

数据库集群引用.

primaryCache

protected IPrimaryCache primaryCache

一级缓存.

secondCache

protected ISecondCache secondCache

二级缓存.

Constructor Detail

AbstractJdbcQuery

public AbstractJdbcQuery()

Method Detail

isCacheAvailable

protected boolean isCacheAvailable(Class<?> clazz,
                                   boolean useCache)

判断一级缓存是否可用

Returns:

true:启用cache, false:不启用

isSecondCacheAvailable

protected boolean isSecondCacheAvailable(Class<?> clazz,
                                         boolean useCache)

判断二级缓存是否可用

Returns:

true:启用cache, false:不启用

_selectGlobalCount

private Number _selectGlobalCount(Connection conn,
                                  Class<?> clazz)

获取全局表的count数

Parameters:

conn -

clazz -

Returns:

count数

selectGlobalCount

protected Number selectGlobalCount(IQuery query,
                                   DBInfo dbConnInfo,
                                   String clusterName,
                                   Class<?> clazz)

selectGlobalCountWithCache

protected Number selectGlobalCountWithCache(DBInfo dbConnInfo,
                                            String clusterName,
                                            Class<?> clazz,
                                            boolean useCache)

带缓存的获取全局表count

Parameters:

conn -

clusterName -

clazz -

Returns:

count数

_selectCount

private Number _selectCount(DB db,
                            Class<?> clazz)

获取分库分表记录总数.

Parameters:

db - 分库分表

clazz - 数据对象

Returns:

表记录总数

Throws:

DBOperationException - 操作失败

IllegalArgumentException - 输入参数错误

selectCountWithCache

protected Number selectCountWithCache(DB db,
                                      Class<?> clazz,
                                      boolean useCache)

getCount加入缓存

Parameters:

db -

clazz -

Returns:

count数

selectCount

protected Number selectCount(DB db,
                             Class<?> clazz,
                             IQuery query)

根据查询条件查询记录数.

Parameters:

db - 分库分表引用

clazz - 实体对象

query - 查询条件

Returns:

记录数

_selectGlobalByPk

private <T> T _selectGlobalByPk(Connection conn,
                                Number pk,
                                Class<T> clazz)

selectByPkWithCache

protected <T> T selectByPkWithCache(Connection conn,
                                    String clusterName,
                                    Number pk,
                                    Class<T> clazz,
                                    boolean useCache)

_selectByPk

private <T> T _selectByPk(DB db,
                          Number pk,
                          Class<T> clazz)

一个主分库分表, 根据主键查询.

Parameters:

pk - 主键

clazz - 数据对象类型

Returns:

查询结果，找不到返回null

Throws:

DBOperationException - 操作失败

IllegalArgumentException - 输入参数错误

selectByPkWithCache

protected <T> T selectByPkWithCache(DB db,
                                    Number pk,
                                    Class<T> clazz,
                                    boolean useCache)

findByPk加入缓存.

Parameters:

db -

pk -

clazz -

Returns:

查询结果

_selectGlobalByPks

private <T> List<T> _selectGlobalByPks(Connection conn,
                                       Class<T> clazz,
                                       Number[] pks)

_selectGlobalByPksWithMap

private <T> Map<Number,T> _selectGlobalByPksWithMap(Connection conn,
                                                    Class<T> clazz,
                                                    Number[] pks)

selectGlobalByPksWithCache

protected <T> List<T> selectGlobalByPksWithCache(Connection conn,
                                                 String clusterName,
                                                 Class<T> clazz,
                                                 Number[] pks,
                                                 boolean useCache)

_selectByPks

private <T> List<T> _selectByPks(DB db,
                                 Class<T> clazz,
                                 Number[] pks)

一个主分库分表, 根据多个主键查询.

Parameters:

db - 分库分表

clazz - 数据对象类型

pks - 主键

Returns:

查询结果

Throws:

DBOperationException - 操作失败

IllegalArgumentException - 输入参数错误

selectByPksWithMap

private <T> Map<Number,T> selectByPksWithMap(DB db,
                                             Class<T> clazz,
                                             Number[] pks)

selectByPksWithCache

protected <T> List<T> selectByPksWithCache(DB db,
                                           Class<T> clazz,
                                           Number[] pks,
                                           boolean useCache)

findByPks加入缓存

Parameters:

db -

clazz -

pks -

Returns:

查询结果

selectGlobalBySql

protected List<Map<String,Object>> selectGlobalBySql(Connection conn,
                                                     SQL sql)

selectBySql

protected List<Map<String,Object>> selectBySql(DB db,
                                               SQL sql)

一个主分库分表, 根据条件查询.

Parameters:

db - 分库分表

sql - 查询语句

Returns:

查询结果

Throws:

DBOperationException - 操作失败

IllegalArgumentException - 输入参数错误

selectGlobalByQuery

protected <T> List<T> selectGlobalByQuery(Connection conn,
                                          IQuery query,
                                          Class<T> clazz)

selectByQuery

protected <T> List<T> selectByQuery(DB db,
                                    IQuery query,
                                    Class<T> clazz)

根据查询条件对象进行查询.

Parameters:

db - 分库分表

query - 查询条件

clazz - 数据对象class

Throws:

DBOperationException - 操作失败

IllegalArgumentException - 输入参数错误

selectGlobalPksByQuery

protected <T> Number[] selectGlobalPksByQuery(Connection conn,
                                              IQuery query,
                                              Class<T> clazz)

selectPksByQuery

protected <T> Number[] selectPksByQuery(DB db,
                                        IQuery query,
                                        Class<T> clazz)

根据查询条件查询主键.

Parameters:

db -

query -

clazz -

Returns:

pk值

_getPkValues

private <T> Map<Number,T> _getPkValues(List<T> entities)

获取列表的主键.

Parameters:

entities -

Returns:

pk值

Throws:

Exception - 获取pk值失败

getDBCluster

public IDBCluster getDBCluster()

Description copied from interface: IDataQuery

get db cluster.

Specified by:

getDBCluster in interface IDataQuery

setDBCluster

public void setDBCluster(IDBCluster dbCluster)

Description copied from interface: IDataQuery

set db cluster.

Specified by:

setDBCluster in interface IDataQuery

setPrimaryCache

public void setPrimaryCache(IPrimaryCache primaryCache)

Description copied from interface: IDataQuery

set primary cache.

Specified by:

setPrimaryCache in interface IDataQuery

getPrimaryCache

public IPrimaryCache getPrimaryCache()

Description copied from interface: IDataQuery

get second cache.

Specified by:

getPrimaryCache in interface IDataQuery

setSecondCache

public void setSecondCache(ISecondCache secondCache)

Description copied from interface: IDataQuery

set second cache.

Specified by:

setSecondCache in interface IDataQuery

getSecondCache

public ISecondCache getSecondCache()

Description copied from interface: IDataQuery

get second cache.

Specified by:

getSecondCache in interface IDataQuery