Classes in the LDQ API

Writer Class CL_LDQ_WRITER

The class CL_LDQ_WRITER serves to initialize the table of queues for the LDQ writing use case. It implements the interface IF_LDQ_WRITER.

UML Representation:

Attribute Overview:

Attribute	Visibility / Level	Description
M_APPLICATION_NAME	Protected Instance	LDQ application name

Method overview:

Method	Visibility/Level	Description
SET_QUEUE_NAMES	Public Instance	The method creates an LDQ unit writer object. The method requires a table of LDQ queue names and returns an interface reference.

Unit Writer Class CL_LDQ_UNIT_WRITER

The class CL_LDQ_UNIT_WRITER persists the LDQ queues in the database. The class implements the interface IF_LDQ_UNIT_WRITER.

UML Representation:

Attribute Overview:

Attribute	Visibility / Level	Description
M_QUEUE_NAME_TAB	Protected Instance	Table of LDQ queue names.
M_APPLICATION_NAME	Protected Instance	LDQ application name.
M_QUEUE_NAMES_IN_ADMIN	Protected Instance	True when table of LDQ queue names was added to administration table.
C_ORDER_NUMBER	Private Static	Define Order of Unit Generation.
C_APPLICATION_ADMIN_TAB	Private Static	Administration Table for Applications and Queues.

Method overview:

Method	Visibility/Level	Description
GET_NEXT_CONTENT	Public Instance	Create the next unit's content. The method returns an interface reference.
CONSTRUCTOR	Public Instance	Constructor.
CLASS_CONSTRUCTOR	Public Static	Class constructor.
ON_COMMIT	Public Static	Persist the created LDQ units in the database.
ON_ROLLBACK	Public Static	Roll back the created LDQ units.
AFTER_COMMIT	Public Static	Delete the internal tables.

Unit Content Writer Class CL_LDQ_UNIT_CONTENT_WRITER

The class CL_LDQ_UNIT_CONTENT_WRITER writes a payload into LDQ units. The class implements the interface IF_LDQ_UNIT_CONTENT_WRITER.

UML Representation:

No public or protected attributes.

Method overview:

Method	Visibility/Level	Description
SET_CDATA	Public Instance	The method writes character-like data. The method requires a character string. The method throws an exception if the unit is invalid.
SET_XDATA	Public Instance	The method writes binary data. The method requires a byte string.
GET_UNIT_ID	Public Instance	The method reads the current Unit ID.
SET_DESCRIPTION	Public Instance	The method writes additional description to the Unit. The method requires a Short Character String. Note If a string contains more than 255 characters, the remaining characters are cut off.
CONSTRUCTOR	Public Instance	Constructor.
CLASS_CONSTRUCTOR	Public Static	Class Constructor

Classes in the LDQ API - "Write"