LocalDatabaseImpl (Castor JavaDoc)

java.lang.Object
- org.exolab.castor.jdo.engine.AbstractDatabaseImpl
- - org.exolab.castor.jdo.engine.LocalDatabaseImpl

All Implemented Interfaces:

Database
```
public class LocalDatabaseImpl
extends AbstractDatabaseImpl
```
An implementation of the JDO Database interface supporting explicit local transaction demarcation.

Version:

$Revision: 8347 $ $Date: 2006-04-10 16:39:24 -0600 (Mon, 10 Apr 2006) $

Author:

Assaf Arkin, Bruce Snyder, Werner Guttmann

Field Summary
- Fields inherited from class org.exolab.castor.jdo.engine.AbstractDatabaseImpl
  _autoStore, _callback, _classLoader, _ctx, _dbName, _instanceFactory, _lockTimeout, _scope
- Fields inherited from interface org.exolab.castor.jdo.Database
  DBLOCKED, EXCLUSIVE, READONLY, SHARED

Constructor Summary

Constructors
Constructor	Description
`LocalDatabaseImpl(java.lang.String dbName, int lockTimeout, CallbackInterceptor callback, InstanceFactory instanceFactory, java.lang.ClassLoader classLoader, boolean autoStore)`	Creates an instance of this class.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`begin()`	Begin a new transaction.
`void`	`close()`	Closes the database.
`void`	`commit()`	Commits and closes the transaction.
`protected void`	`finalize()`	Overrides Object.finalize().
`java.sql.Connection`	`getJdbcConnection()`	Gets the underlying JDBC connection.
`void`	`rollback()`	Rolls back and closes the transaction.

Methods inherited from class org.exolab.castor.jdo.engine.AbstractDatabaseImpl
create, getCacheManager, getClassLoader, getCurrentTransaction, getDatabaseName, getIdentity, getLockEngine, getNamedQuery, getNativeQuery, getOQLQuery, getOQLQuery, getQuery, getScope, getTransaction, isActive, isAutoStore, isClosed, isLocked, isPersistent, load, load, load, loadSynchronizables, lock, registerSynchronizables, remove, setAutoStore, toString, unregisterSynchronizables, update

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - LocalDatabaseImpl
```
public LocalDatabaseImpl(java.lang.String dbName,
                         int lockTimeout,
                         CallbackInterceptor callback,
                         InstanceFactory instanceFactory,
                         java.lang.ClassLoader classLoader,
                         boolean autoStore)
                  throws DatabaseNotFoundException
```
    Creates an instance of this class.
    
    Parameters:
    
    dbName - database name
    
    lockTimeout - Lock timeout
    
    callback - CallbackInterceptor instance
    
    instanceFactory - Instance factory.
    
    classLoader - Current class loader
    
    autoStore - Indicates whether to use 'auto-storing'
    
    Throws:
    
    DatabaseNotFoundException - If the specified database configuration cannot be found.
- Method Detail
  - close
```
public void close()
           throws PersistenceException
```
    Description copied from class: AbstractDatabaseImpl
    
    Closes the database. If a client transaction is in progress the transaction will be rolled back and an exception thrown. If an app-server transaction is in progress, the transaction will commit/rollback when triggered by the application server.
    
    Specified by:
    
    close in interface Database
    
    Specified by:
    
    close in class AbstractDatabaseImpl
    
    Throws:
    
    PersistenceException - An error occured while attempting to close the database
  - finalize
```
protected void finalize()
                 throws java.lang.Throwable
```
    Overrides Object.finalize(). Outputs a warning message to the logs if the current DatabaseImpl instance still has valid scope. In this condition - a condition that ideally should not occur at all - we close the instance as well to free up resources.
    
    Overrides:
    
    finalize in class java.lang.Object
    
    Throws:
    
    java.lang.Throwable
    
    See Also:
    
    Object.finalize()
  - begin
```
public void begin()
           throws PersistenceException
```
    Description copied from class: AbstractDatabaseImpl
    
    Begin a new transaction. A transaction must be open in order to query and persist objects.
    
    Specified by:
    
    begin in interface Database
    
    Specified by:
    
    begin in class AbstractDatabaseImpl
    
    Throws:
    
    PersistenceException - A transaction is already open on this database, or an error reported by the persistence engine
  - commit
```
public void commit()
            throws TransactionNotInProgressException,
                   TransactionAbortedException
```
    Description copied from class: AbstractDatabaseImpl
    
    Commits and closes the transaction. All changes made to persistent objects during the transaction are made persistent; objects created during the transaction are made durable; and, objects removed during the transaction are removed from the database.
    In other words, any modifications to any data objects which are queried/loaded/created/update to this database is automatically stored to the database and visible to subsequence transactions. (ie. update is solely used for long transaction support and should not be called for any data object queried/loaded/created in the this transaction.)
    If the transaction cannot commit, the entire transaction rolls back and a TransactionAbortedException exception is thrown.
    After this method returns, the transaction is closed and all persistent objects are transient. Using Database.begin() to open a new transaction will not restore objects to their persistent stage.
    
    Specified by:
    
    commit in interface Database
    
    Specified by:
    
    commit in class AbstractDatabaseImpl
    
    Throws:
    
    TransactionNotInProgressException - Method called while transaction is not in progress
    
    TransactionAbortedException - The transaction cannot commit and has been rolled back
  - rollback
```
public void rollback()
              throws TransactionNotInProgressException
```
    Description copied from class: AbstractDatabaseImpl
    
    Rolls back and closes the transaction. All changes made to persistent objects during the transaction are lost, objects created during the transaction are not made durable and objects removed during the transaction continue to exist.
    
    Specified by:
    
    rollback in interface Database
    
    Specified by:
    
    rollback in class AbstractDatabaseImpl
    
    Throws:
    
    TransactionNotInProgressException - Method called while transaction is not in progress
  - getJdbcConnection
```
public java.sql.Connection getJdbcConnection()
                                      throws PersistenceException
```
    Description copied from class: AbstractDatabaseImpl
    
    Gets the underlying JDBC connection. This is for advanced use only. Please make sure that you never close this Connection instance, as it will be closed by Castor.
    
    Specified by:
    
    getJdbcConnection in interface Database
    
    Specified by:
    
    getJdbcConnection in class AbstractDatabaseImpl
    
    Returns:
    
    the underlying JDBC connection, if present; otherwise null
    
    Throws:
    
    PersistenceException - If the underlying JDBC connection cannot be obtained.

Class LocalDatabaseImpl

Field Summary

Fields inherited from class org.exolab.castor.jdo.engine.AbstractDatabaseImpl

Fields inherited from interface org.exolab.castor.jdo.Database

Constructor Summary

Method Summary

Methods inherited from class org.exolab.castor.jdo.engine.AbstractDatabaseImpl

Methods inherited from class java.lang.Object

Constructor Detail

LocalDatabaseImpl

Method Detail

close

finalize

begin

commit

rollback

getJdbcConnection