org.datanucleus.store.rdbms.autostart

Class SchemaAutoStarter

java.lang.Object

org.datanucleus.store.autostart.AbstractAutoStartMechanism

org.datanucleus.store.rdbms.autostart.SchemaAutoStarter

All Implemented Interfaces:

org.datanucleus.store.autostart.AutoStartMechanism

public class SchemaAutoStarter
extends org.datanucleus.store.autostart.AbstractAutoStartMechanism

Implementation of an Auto-Start Mechanism for DataNucleus. This implementation stores the classes supported in a table in the datastore. It is initialised and read at startup, and is continually updated during the lifetime of the calling application.

Nested Class Summary

Nested classes/interfaces inherited from interface org.datanucleus.store.autostart.AutoStartMechanism

org.datanucleus.store.autostart.AutoStartMechanism.Mode

Field Summary

Fields

Modifier and Type	Field and Description
protected org.datanucleus.store.connection.ManagedConnection	mconn
protected SchemaTable	schemaTable
protected RDBMSStoreManager	storeMgr

Fields inherited from class org.datanucleus.store.autostart.AbstractAutoStartMechanism

mode, open

Constructor Summary

Constructors

Constructor and Description
SchemaAutoStarter(org.datanucleus.store.StoreManager store_mgr, org.datanucleus.ClassLoaderResolver clr) Constructor.

Method Summary

Modifier and Type	Method and Description
void	addClass(org.datanucleus.store.StoreData data) Method to add a class to the supported list.
void	close() Closes a transaction for writing (add/delete) classes to the auto start mechanism
void	deleteAllClasses() Method to drop support for all current classes.
void	deleteClass(String class_name) Method to drop support for a class.
Collection	getAllClassData() Accessor for the data for the classes supported.
String	getStorageDescription() Utility to output the storage description for this mechanism.
boolean	isOpen() Whether it's open for writing (add/delete) classes to the auto start mechanism
void	open() Starts a transaction for writing (add/delete) classes to the auto start mechanism

Methods inherited from class org.datanucleus.store.autostart.AbstractAutoStartMechanism

getMode, setMode

Methods inherited from class java.lang.Object

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

Field Detail

schemaTable

protected SchemaTable schemaTable

storeMgr

protected RDBMSStoreManager storeMgr

mconn

protected org.datanucleus.store.connection.ManagedConnection mconn

Constructor Detail

SchemaAutoStarter

public SchemaAutoStarter(org.datanucleus.store.StoreManager store_mgr,
                         org.datanucleus.ClassLoaderResolver clr)

Constructor.

Parameters:

store_mgr - The RDBMSManager managing the store that we are auto-starting.

clr - The ClassLoaderResolver

Method Detail

getAllClassData

public Collection getAllClassData()
                           throws org.datanucleus.store.exceptions.DatastoreInitialisationException

Accessor for the data for the classes supported.

Returns:

Collection of classes supported (StoreData). Collection of StoreData elements

Throws:

org.datanucleus.store.exceptions.DatastoreInitialisationException - if an error occurs in datastore communication

open

public void open()

Starts a transaction for writing (add/delete) classes to the auto start mechanism

Specified by:

open in interface org.datanucleus.store.autostart.AutoStartMechanism

Overrides:

open in class org.datanucleus.store.autostart.AbstractAutoStartMechanism

close

public void close()

Closes a transaction for writing (add/delete) classes to the auto start mechanism

Specified by:

close in interface org.datanucleus.store.autostart.AutoStartMechanism

Overrides:

close in class org.datanucleus.store.autostart.AbstractAutoStartMechanism

isOpen

public boolean isOpen()

Whether it's open for writing (add/delete) classes to the auto start mechanism

Specified by:

isOpen in interface org.datanucleus.store.autostart.AutoStartMechanism

Overrides:

isOpen in class org.datanucleus.store.autostart.AbstractAutoStartMechanism

Returns:

whether this is open for writing

addClass

public void addClass(org.datanucleus.store.StoreData data)

Method to add a class to the supported list.

Parameters:

data - Data for the class to add.

deleteClass

public void deleteClass(String class_name)

Method to drop support for a class.

Parameters:

class_name - The class

deleteAllClasses

public void deleteAllClasses()

Method to drop support for all current classes.

getStorageDescription

public String getStorageDescription()

Utility to output the storage description for this mechanism.

Returns:

The storage description