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org.apache.ojb.broker.metadata
Class MetadataManager  

java.lang.Object
  org.apache.ojb.broker.metadata.MetadataManager

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public class MetadataManager

extends java.lang.Object

Central class for metadata operations - manages all OJB's DescriptorRepository and ConnectionRepository instances.
Allow a bunch of different repository handling possibilities - allows a transparent flexible metadata manipulation at runtime.

Per default the manager handle one global DescriptorRepository for all calling threads, but you could enable a per thread 55 handling. This enables to set a different DescriptorRepository for each calling thread. This allows a per thread manipulation of the persistent object metadata at runtime.

Version:

$Id: MetadataManager.java,v 1.5 2003/01/31 17:55:55 arminw Exp $

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Field Summary
private  ConnectionRepository	connectionRepository
private  boolean	enablePerThreadChanges
private  DescriptorRepository	globalRepository
private static org.apache.ojb.broker.util.logging.Logger	log
private static MetadataManager	singleton
private static java.lang.ThreadLocal	threadedRepository

 

Constructor Summary
private	MetadataManager()

 

Method Summary
ConnectionRepository	connectionRepository()           Returns the ConnectionRepository.
DescriptorRepository	copyOfGlobalRepository()           Returns a copy of the current global DescriptorRepository
DescriptorRepository	getGlobalRepository()           Returns explicit the global DescriptorRepository - use with care, because it ignores the per thread mode 55 .
static MetadataManager	getInstance()           Returns an instance of this class.
DescriptorRepository	getRepository()           Returns the current valid DescriptorRepository for the caller.
private  void	init()
boolean	isEnablePerThreadChanges()           If returns true runtime (per thread) changes of the DescriptorRepository will take effect.
void	setDescriptor(DescriptorRepository repository, boolean global)           Set the DescriptorRepository - if global was true, the given descriptor aquire global availability (use with care!), else the given descriptor was associated with the calling thread.
void	setEnablePerThreadChanges(boolean enablePerThreadChanges)           Enable the possibility of making per thread runtime changes of the DescriptorRepository.
void	setPerThreadDescriptor(DescriptorRepository repository)           Convenience method for setDescriptor(repository, false) 55 .

 

Methods inherited from class java.lang.Object

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

 

Field Detail

log

private static org.apache.ojb.broker.util.logging.Logger log

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threadedRepository

private static java.lang.ThreadLocal threadedRepository

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singleton

private static MetadataManager singleton

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globalRepository

private DescriptorRepository globalRepository

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connectionRepository

private ConnectionRepository connectionRepository

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enablePerThreadChanges

private boolean enablePerThreadChanges

Constructor Detail

MetadataManager

private MetadataManager()

Method Detail

init

private void init()

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getInstance

public static MetadataManager getInstance()

Returns an instance of this class.

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getRepository

public DescriptorRepository getRepository()

Returns the current valid DescriptorRepository for the caller. This is the provided way to obtain the DescriptorRepository.
When per thread descriptor handling 55 is enabled we first search for a DescriptorRepository for the calling thread, if not found the global descriptor was returned.

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getGlobalRepository

public DescriptorRepository getGlobalRepository()

Returns explicit the global DescriptorRepository - use with care, because it ignores the per thread mode 55 .

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connectionRepository

public ConnectionRepository connectionRepository()

Returns the ConnectionRepository.

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setDescriptor

public void setDescriptor(DescriptorRepository repository,
                          boolean global)

Set the DescriptorRepository - if global was true, the given descriptor aquire global availability (use with care!), else the given descriptor was associated with the calling thread.

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setPerThreadDescriptor

public void setPerThreadDescriptor(DescriptorRepository repository)

Convenience method for setDescriptor(repository, false) 55 .

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copyOfGlobalRepository

public DescriptorRepository copyOfGlobalRepository()

Returns a copy of the current global DescriptorRepository

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isEnablePerThreadChanges

public boolean isEnablePerThreadChanges()

If returns true runtime (per thread) changes of the DescriptorRepository will take effect.
If returns false all made and further runtime (per thread) changes will be ignored.

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setEnablePerThreadChanges

public void setEnablePerThreadChanges(boolean enablePerThreadChanges)

Enable the possibility of making per thread runtime changes of the DescriptorRepository.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> ojb >> broker >> [ metadata overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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