DBImpl

java.lang.Object
- org.olat.data.commons.database.DBImpl

所有已实现的接口:

DB, Destroyable

已过时。
```
public class DBImpl
extends java.lang.Object
implements DB, Destroyable
```
A DB is a central place to get a Hibernate Session. It acts as a facade to the database, transactions and Queries. The hibernateSession is lazy loaded per thread.

作者:

Andreas Ch. Kapp, Christian Guretzki

方法概要

方法
限定符和类型	方法和说明
`void`	`addTransactionListener(ITransactionListener listener)` 已过时。 Add an ITransactionListener to this DB instance.
`void`	`cleanUpSession()` 已过时。 Close the database session, clean threadlocal but only if necessary
`void`	`closeSession()` 已过时。 Close the database session.
`void`	`commit()` 已过时。 Call this to commit a transaction opened by beginTransaction().
`void`	`commitAndCloseSession()` 已过时。 Checks if the transaction needs to be committed and does so if this is the case, plus closes the connection in any case guaranteed.
`DBQuery`	`createQuery(java.lang.String query)` 已过时。 Create a DBQuery
`int`	`delete(java.lang.String query, java.lang.Object[] values, org.hibernate.type.Type[] types)` 已过时。 Deletion query.
`int`	`delete(java.lang.String query, java.lang.Object value, org.hibernate.type.Type type)` 已过时。 Deletion query.
`void`	`deleteObject(java.lang.Object object)` 已过时。 Delete an object.
`void`	`destroy()` 已过时。 must be called manually in the spring config file or if you like the annotations way add a @PreDestroy to the method
`java.util.List`	`find(java.lang.String query)` 已过时。 Find objects based on query
`java.util.List`	`find(java.lang.String query, java.lang.Object[] values, org.hibernate.type.Type[] types)` 已过时。 Find objects based on query
`java.util.List`	`find(java.lang.String query, java.lang.Object value, org.hibernate.type.Type type)` 已过时。 Find objects based on query
`java.lang.Object`	`findObject(java.lang.Class theClass, java.lang.Long key)` 已过时。 Find an object.
`java.lang.Exception`	`getError()` 已过时。 Get any errors from a previous DB call.
`org.hibernate.stat.Statistics`	`getStatistics()` 已过时。 Statistics must be enabled first, when you want to use it.
`void`	`intermediateCommit()` 已过时。 Call this to intermediate commit current changes.
`boolean`	`isError()` 已过时。
`java.lang.Object`	`loadObject(java.lang.Class theClass, java.lang.Long key)` 已过时。 Load an object.
`Persistable`	`loadObject(Persistable persistable)` 已过时。 see DB.loadObject(Persistable persistable, boolean forceReloadFromDB)
`Persistable`	`loadObject(Persistable persistable, boolean forceReloadFromDB)` 已过时。 loads an object if needed. this makes sense if you have an object which had been generated in a previous hibernate session AND you need to access a Set or a attribute which was defined as a proxy.
`boolean`	`needsCommit()` 已过时。
`void`	`removeTransactionListener(ITransactionListener listener)` 已过时。 Removes an ITransactionListener from this DB instance.
`void`	`rollback()` 已过时。 Call this to rollback current changes.
`void`	`rollbackAndCloseSession()` 已过时。 Calls rollback and closes the connection guaranteed.
`void`	`saveObject(java.lang.Object object)` 已过时。 Save an object.
`void`	`setSessionFactory(org.hibernate.SessionFactory sessionFactory)` 已过时。 [used by spring]
`void`	`updateObject(java.lang.Object object)` 已过时。 Update an object.

从类继承的方法 java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 方法详细资料
  - closeSession
```
public void closeSession()
```
    已过时。
    
    Close the database session.
    
    指定者:
    
    closeSession 在接口中 DB
  - cleanUpSession
```
public void cleanUpSession()
```
    已过时。
    
    从接口复制的说明: DB
    
    Close the database session, clean threadlocal but only if necessary
    
    指定者:
    
    cleanUpSession 在接口中 DB
  - createQuery
```
public DBQuery createQuery(java.lang.String query)
```
    已过时。
    
    Create a DBQuery
    
    指定者:
    
    createQuery 在接口中 DB
    
    参数:
    query -
    
    返回:
    DBQuery
  - deleteObject
```
public void deleteObject(java.lang.Object object)
```
    已过时。
    
    Delete an object.
    
    指定者:
    
    deleteObject 在接口中 DB
    
    参数:
    object -
  - delete
```
public int delete(java.lang.String query,
         java.lang.Object value,
         org.hibernate.type.Type type)
```
    已过时。
    
    Deletion query.
    
    指定者:
    
    delete 在接口中 DB
    
    参数:
    query -
    value -
    type -
    
    返回:
    nr of deleted rows
  - delete
```
public int delete(java.lang.String query,
         java.lang.Object[] values,
         org.hibernate.type.Type[] types)
```
    已过时。
    
    Deletion query.
    
    指定者:
    
    delete 在接口中 DB
    
    参数:
    query -
    values -
    types -
    
    返回:
    nr of deleted rows
  - find
```
public java.util.List find(java.lang.String query,
                  java.lang.Object value,
                  org.hibernate.type.Type type)
```
    已过时。
    
    Find objects based on query
    
    指定者:
    
    find 在接口中 DB
    
    参数:
    query -
    value -
    type -
    
    返回:
    List of results.
  - find
```
public java.util.List find(java.lang.String query,
                  java.lang.Object[] values,
                  org.hibernate.type.Type[] types)
```
    已过时。
    
    Find objects based on query
    
    指定者:
    
    find 在接口中 DB
    
    参数:
    query -
    values -
    types -
    
    返回:
    List of results.
  - find
```
public java.util.List find(java.lang.String query)
```
    已过时。
    
    Find objects based on query
    
    指定者:
    
    find 在接口中 DB
    
    参数:
    query -
    
    返回:
    List of results.
  - findObject
```
public java.lang.Object findObject(java.lang.Class theClass,
                          java.lang.Long key)
```
    已过时。
    
    Find an object.
    
    指定者:
    
    findObject 在接口中 DB
    
    参数:
    theClass -
    key -
    
    返回:
    Object, if any found. Null, if non exist.
  - loadObject
```
public java.lang.Object loadObject(java.lang.Class theClass,
                          java.lang.Long key)
```
    已过时。
    
    Load an object.
    
    指定者:
    
    loadObject 在接口中 DB
    
    参数:
    theClass -
    key -
    
    返回:
    Object.
  - saveObject
```
public void saveObject(java.lang.Object object)
```
    已过时。
    
    Save an object.
    
    指定者:
    
    saveObject 在接口中 DB
    
    参数:
    object -
  - updateObject
```
public void updateObject(java.lang.Object object)
```
    已过时。
    
    Update an object.
    
    指定者:
    
    updateObject 在接口中 DB
    
    参数:
    object -
  - getError
```
public java.lang.Exception getError()
```
    已过时。
    
    Get any errors from a previous DB call.
    
    返回:
    Exception, if any.
  - isError
```
public boolean isError()
```
    已过时。
    
    指定者:
    
    isError 在接口中 DB
    
    返回:
    True if any errors occured in the previous DB call.
  - loadObject
```
public Persistable loadObject(Persistable persistable)
```
    已过时。
    
    see DB.loadObject(Persistable persistable, boolean forceReloadFromDB)
    
    指定者:
    
    loadObject 在接口中 DB
    
    参数:
    persistable -
    
    返回:
    the loaded object
  - loadObject
```
public Persistable loadObject(Persistable persistable,
                     boolean forceReloadFromDB)
```
    已过时。
    
    loads an object if needed. this makes sense if you have an object which had been generated in a previous hibernate session AND you need to access a Set or a attribute which was defined as a proxy.
    
    指定者:
    
    loadObject 在接口中 DB
    
    参数:
    persistable - the object which needs to be reloaded
    forceReloadFromDB - if true, force a reload from the db (e.g. to catch up to an object commited by another thread which is still in this thread's session cache
    
    返回:
    the loaded Object
  - commitAndCloseSession
```
public void commitAndCloseSession()
```
    已过时。
    
    从接口复制的说明: DB
    
    Checks if the transaction needs to be committed and does so if this is the case, plus closes the connection in any case guaranteed.
    Use this rather than commit() directly wherever possible!
    
    指定者:
    
    commitAndCloseSession 在接口中 DB
  - rollbackAndCloseSession
```
public void rollbackAndCloseSession()
```
    已过时。
    
    从接口复制的说明: DB
    
    Calls rollback and closes the connection guaranteed.
    Note that this method checks whether the connection and the transaction are open and if they're not, then this method doesn't do anything.
    
    指定者:
    
    rollbackAndCloseSession 在接口中 DB
  - commit
```
public void commit()
```
    已过时。
    
    Call this to commit a transaction opened by beginTransaction().
    
    指定者:
    
    commit 在接口中 DB
  - rollback
```
public void rollback()
```
    已过时。
    
    Call this to rollback current changes.
    
    指定者:
    
    rollback 在接口中 DB
  - getStatistics
```
public org.hibernate.stat.Statistics getStatistics()
```
    已过时。
    
    Statistics must be enabled first, when you want to use it.
    
    指定者:
    
    getStatistics 在接口中 DB
    
    返回:
    Return Hibernates statistics object.
  - intermediateCommit
```
public void intermediateCommit()
```
    已过时。
    
    从接口复制的说明: DB
    
    Call this to intermediate commit current changes. Use this method in startup process and bulk changes.
    
    指定者:
    
    intermediateCommit 在接口中 DB
  - addTransactionListener
```
public void addTransactionListener(ITransactionListener listener)
```
    已过时。
    
    从接口复制的说明: DB
    
    Add an ITransactionListener to this DB instance.
    The ITransactionListener will be informed about commit and rollbacks.
    Adding the same listener twice has no effect.
    
    指定者:
    
    addTransactionListener 在接口中 DB
    
    参数:
    listener - the listener to be added
  - removeTransactionListener
```
public void removeTransactionListener(ITransactionListener listener)
```
    已过时。
    
    从接口复制的说明: DB
    
    Removes an ITransactionListener from this DB instance.
    If the ITransactionListener is currently not registered, this call has no effect.
    
    指定者:
    
    removeTransactionListener 在接口中 DB
  - needsCommit
```
public boolean needsCommit()
```
    已过时。
  - setSessionFactory
```
public void setSessionFactory(org.hibernate.SessionFactory sessionFactory)
```
    已过时。
    
    [used by spring]
    
    参数:
    sessionFactory -
  - destroy
```
public void destroy()
```
    已过时。
    
    从接口复制的说明: Destroyable
    
    must be called manually in the spring config file or if you like the annotations way add a @PreDestroy to the method
    
    指定者:
    
    destroy 在接口中 Destroyable

类 DBImpl

方法概要

从类继承的方法 java.lang.Object

方法详细资料

closeSession

cleanUpSession

createQuery

deleteObject

delete

delete

find

find

find

findObject

loadObject

saveObject

updateObject

getError

isError

loadObject

loadObject

commitAndCloseSession

rollbackAndCloseSession

commit

rollback

getStatistics

intermediateCommit

addTransactionListener

removeTransactionListener

needsCommit

setSessionFactory

destroy