Package es.bsc.dataclay.loader

Class DataClayObjectLoader

java.lang.Object

es.bsc.dataclay.loader.DataClayObjectLoader

Direct Known Subclasses:

ClientObjectLoader, ExecutionObjectLoader

public abstract class DataClayObjectLoader
extends Object

This class is responsable to create DataClayObjects and load them with data coming from different resources. All possible constructions of DataClayObject should be included here. All possible "filling instance" use-cases should be managed here. Most of lockers should be located here.

Field Summary

Fields

Modifier and Type	Field	Description
protected static boolean	DEBUG_ENABLED	Indicates if debug is enabled.
protected static org.apache.logging.log4j.Logger	logger

Constructor Summary

Constructors

Constructor	Description
DataClayObjectLoader()	Constructor

Method Summary

Modifier and Type	Method	Description
abstract void	deserializeDataIntoInstance(DataClayObject instance, ObjectWithDataParamOrReturn data, Map<MetaClassID,byte[]> ifaceBitMaps)	Deserialize data into instance.
DataClayObject	getOrNewAndLoadVolatile(MetaClassID classID, ObjectID objectID, BackendID hint, ObjectWithDataParamOrReturn objWithData, Map<MetaClassID,byte[]> ifaceBitMaps)	Get from Heap or create a new volatile in EE and load data on it.
DataClayObject	getOrNewPersistentInstance(MetaClassID classID, ObjectID objectID, BackendID hint)	Check if instance exists in Heap or create a new PERSISTENT instance if needed
protected abstract DataClayRuntime	getRuntime()	Get runtime
protected abstract DataClayObject	newInstance(MetaClassID classID, ObjectID objectID)	Create a new instance using proper class loader
protected DataClayObject	newInstanceInternal(MetaClassID classID, ObjectID objectID, BackendID hint)	Create a new instance using proper class loader

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.apache.logging.log4j.Logger logger

DEBUG_ENABLED

protected static final boolean DEBUG_ENABLED

Indicates if debug is enabled.

Constructor Detail

DataClayObjectLoader

public DataClayObjectLoader()

Constructor

Method Detail

newInstance

protected abstract DataClayObject newInstance(MetaClassID classID,
                                              ObjectID objectID)

Create a new instance using proper class loader

Parameters:

classID - ID of class

objectID - ID of object

Returns:

Instance

getRuntime

protected abstract DataClayRuntime getRuntime()

Get runtime

Returns:

The runtime being managed.

getOrNewPersistentInstance

public DataClayObject getOrNewPersistentInstance(MetaClassID classID,
                                                 ObjectID objectID,
                                                 BackendID hint)

Check if instance exists in Heap or create a new PERSISTENT instance if needed

Parameters:

classID - ID of the class in case it is needed (not need to query) if null, look for class id in metadata.

objectID - ID of object

hint - Can be null. Hint in case object is a volatile in another DS and we need information.

Returns:

Instance

newInstanceInternal

protected DataClayObject newInstanceInternal(MetaClassID classID,
                                             ObjectID objectID,
                                             BackendID hint)

Create a new instance using proper class loader

Parameters:

classID - ID of the class in case it is needed (not need to query) if null, look for class id in metadata.

objectID - ID of object

hint - Can be null. Hint in case object is a volatile in another DS and we need information.

Returns:

Instance

getOrNewAndLoadVolatile

public DataClayObject getOrNewAndLoadVolatile(MetaClassID classID,
                                              ObjectID objectID,
                                              BackendID hint,
                                              ObjectWithDataParamOrReturn objWithData,
                                              Map<MetaClassID,byte[]> ifaceBitMaps)

Get from Heap or create a new volatile in EE and load data on it.

Parameters:

classID - ID of class of the object

objectID - ID of the object

hint - Hint of the object

objWithData - Data of the object

ifaceBitMaps - Interface bitmaps

Returns:

Loaded volatile instance in EE.

deserializeDataIntoInstance

public abstract void deserializeDataIntoInstance(DataClayObject instance,
                                                 ObjectWithDataParamOrReturn data,
                                                 Map<MetaClassID,byte[]> ifaceBitMaps)

Deserialize data into instance.

Parameters:

instance - Instance to be filled.

data - Data

ifaceBitMaps - Interface bitmaps