Creating a service

Steps

1. Create a SEGW Project
2. Generate classes
3. Implement the framework MPC method
4. Implementing the framework DPC methods
   • Boilerplate coding for the OData methods
5. Customize your service

Create a SEGW Project

First of all we need to create a SEGW project. Transaction code: SEGW

Generate Classes

To start with our development we first need the SEGW transaction to generate the DPC and MPC classes.

You might want to change now the class names to match the system naming conventions.

After this we're done using the SEGW for developing reasons.

Implement the Framework MPC Method

First we open the "MPC_EXT" Class. We then want to redefine the "define" method.

PUBLIC SECTION.
	METHODS define REDEFINITION.

Next we add the OData framework by calling the "define_mpc" method of the framework class (ZCL_ODATA_FW_CONTROLLER). Notice, that 'Z_MY_PROJECT' is the namespace, that we need to use in the framework view cluster.

METHOD define.
	TRY.
		NEW zcl_odata_fw_controller( 'Z_MY_PROJECT'
			)->define_mpc(
				i_model = model
				i_anno_model = vocab_anno_model ).
	CATCH zcx_odata INTO DATA(lo_error).
		zcl_odata_utils=>raise_mpc_error( lo_error ).
	ENDTRY.
ENDMETHOD.

Implementing the Framework DPC Methods

For the DPC methods to work with the framework we need to implement two things in the DPC_EXT class.

1. Constructor

METHOD constructor.
	super->constructor( ).
	TRY.
		me->mt_data_providers = NEW #( me ).
		NEW zcl_odata_fw_controller( 'Z_MY_PROJECT'
		)->define_dpc( i_data_provider = me->mt_data_providers ).
	CATCH zcx_odata INTO DATA(lo_error).
		NEW zcl_odata_error_handler( me )->raise_exception_object( lo_error ).
	ENDTRY.
ENDMETHOD.

2. Data provider attribute

DATA: mt_data_providers TYPE REF TO zcl_odata_data_provider.

Boilerplate Coding for the OData Methods

For the boilerplate code, that has to be inserted into the OData methods you can copy the lines in the DPC boilerplate code file.

Customize Your Service

Implement your odata service customizing. By calling the ZODATA_CUST transaction. For a detailed documentation you can look into the OData Customizing file.