Data Control

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Data control is a standard mechanism for exchanging specific data between applications.

Required Header

#include <data_control.h>

Overview

All applications can request data shared by other applications using data control. However, only service applications can provide their own data. There are 2 types of data controls:

• DATA_CONTROL_SQL This allows you to use a SQL-type data control to access the specific data exported by other service applications. You can also define a SQL-type data control provider to export specific data from your service application.
• DATA_CONTROL_MAP This allows you to use a key value-type data control to access the data exported by other service applications. You can also define an key value-type data control provider to export the specific data from your service application.

Typedefs
typedef struct data_control_bulk_data_s *	data_control_bulk_data_h
	The bulk data handle.
typedef struct data_control_bulk_result_data_s *	data_control_bulk_result_data_h
	The bulk result data handle.
typedef struct data_control_s *	data_control_h
	The structure type for the provider handle.

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Typedef Documentation

typedef struct data_control_bulk_data_s* data_control_bulk_data_h

The bulk data handle.

Since :

3.0

typedef struct data_control_bulk_result_data_s* data_control_bulk_result_data_h

The bulk result data handle.

Since :

3.0

typedef struct data_control_s* data_control_h

The structure type for the provider handle.

Since :

2.3

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Enumeration Type Documentation

enum data_control_data_change_type_e

Enumeration for the various data changed notification types.

Since :

3.0

Enumerator:

DATA_CONTROL_DATA_CHANGE_SQL_UPDATE	Update notification
DATA_CONTROL_DATA_CHANGE_SQL_INSERT	Insert notification
DATA_CONTROL_DATA_CHANGE_SQL_DELETE	Delete notification
DATA_CONTROL_DATA_CHANGE_MAP_SET	Set notification
DATA_CONTROL_DATA_CHANGE_MAP_ADD	Add notification
DATA_CONTROL_DATA_CHANGE_MAP_REMOVE	Remove notification

enum data_control_error_e

Enumeration for the various error codes an API can return.

Since :

2.3

Enumerator:

DATA_CONTROL_ERROR_NONE	Successful
DATA_CONTROL_ERROR_OUT_OF_MEMORY	Out of memory
DATA_CONTROL_ERROR_IO_ERROR	I/O error
DATA_CONTROL_ERROR_INVALID_PARAMETER	Invalid parameter
DATA_CONTROL_ERROR_PERMISSION_DENIED	Permission denied
DATA_CONTROL_ERROR_MAX_EXCEEDED	Too long argument

enum data_control_sql_column_type_e

Enumeration for different types of columns in a SQL table.

Since :

2.3

Enumerator:

DATA_CONTROL_SQL_COLUMN_TYPE_UNDEFINED	undefined type
DATA_CONTROL_SQL_COLUMN_TYPE_INT64	integer type
DATA_CONTROL_SQL_COLUMN_TYPE_DOUBLE	double type
DATA_CONTROL_SQL_COLUMN_TYPE_TEXT	text type
DATA_CONTROL_SQL_COLUMN_TYPE_BLOB	blob type
DATA_CONTROL_SQL_COLUMN_TYPE_NULL	null value