CRecord on sillysky.net

CSlotType

Tue, 14 Oct 2025 00:00:00 +0000

A slot type is implemented as a class that holds other data besides the type.

Each type has a numeric ID (or ordinal value):

public int getId();

A name and a type string is kept ready for the tool support.

public String getName();
public String getTypeString();

A flag indicates whether data in the type is transportable or only available locally in a node.

public boolean isStorable()

Notes

CSlotType supports the equals() and hashCode() methods.

IGeneratedRecord

Tue, 14 Oct 2025 00:00:00 +0000

IGeneratedRecord is just an empty marker interface.

It is used by generated record classes.

ISingleSlotTypeFactory

Tue, 14 Oct 2025 00:00:00 +0000

This interface is a factory for creating a single slot type. If custom slot types are to be introduced, a class must be created for each slot type that implements this interface. Likewise, a class must be created that implements the ISlot interface.

Slot type

The factory identifies itself with the produced slot type.

@NotNull
CSlotType getType();

Class of the transported value

Slots always transport a certain Java type. This is returned here.

Creation of a slot from an object

The creation of a slot from an object is done here.

ISlot

Tue, 14 Oct 2025 00:00:00 +0000

The slot is a component of the record, which means it belongs to the message. It consists of a slot type and the data it transports. The implementation remains hidden, so that you only have to deal with the ISlot interface. The object itself is put into a form in the slot that can be used to transport it via DataStreams or JSON.

Slots are created via a factory, the ISlotFactory. The ISlotFactor interface is obtained from the service registry.

ISlotFactory

Tue, 14 Oct 2025 00:00:00 +0000

The SlotFactory creates slots for use in Records in Messages. It is expandable with custom slot types.

The SlotFactory can be fetched as a service via the ServiceRegistry:

final ISlotFactory slotFactory = CServiceRegistry.getInstance()
                                                 .getService(ISlotFactory.class);

Creation of a slot

To create a slot we need the slot type:

ISlot create(CSlotType aType) throws CException;

The slot type can also be determined by the system by specifying a value:

ISlot fromObject(@Nullable Object aValue);

If you want to be on the safe side, you can also specify both: