Custom E-tag for optimistic lock in SAP Gateway Odata for Deep Update

This blog is about the locking concept in SAP Gateway odata for update deep method. As there are already many blogs on optimistic and pessimistic locking mechanism. And in Gateway Odata there are different ways to implement optimistic lock for concurrency control. below are the ways which I am trying to categorizing 

1.) Using Timestamp for E-tag

2.) Using Hash for E-tag

ABAP Exception Class ZCX_RETURN2 – Raise code templates

This blog post contains code templates for adding ZCX_RETURN2 exception raising code.

Template overview

◉ CREATE_BY_SYSTEM_MESSAGE (without MESSAGE statement)

◉ CREATE_BY_SYSTEM_MESSAGE (with MESSAGE statement for custom message)

◉ CREATE_BY_BAPIRETURN_STRUC

◉ CREATE_BY_BAPIRETURN_TABLE

◉ CREATE_BY_BAPIRET1_TABLE

◉ CREATE_BY_BAPIRET2_STRUC

◉ CREATE_BY_BAPIRET2_TABLE

◉ CREATE_BY_BDC_MESSAGE_TABLE

◉ CREATE_BY_EXCEPTION_OBJECT – catch for example CX_ROOT

The ABAP Data Dictionary

Here is a guide to using tables, we use this within our internal courses, I haven’t run one for some time with the lockdown in the UK, but I share it here for the benefit of others in this wider SAP community.

Tables can be defined independent of the database in ABAP Dictionary. When a table is activated in ABAP Dictionary, a similar copy of its fields is created in the database as well. The tables defined in ABAP Dictionary are then translated automatically into the format that is compatible with the database, because the definition of the table depends on the database used by the SAP system.

Call a Remote Function Module (RFC) From SAP Cloud Platform ABAP Environment

First some important prerequisites (because I noticed these myself just late somewhere in the fine print after spending [wasting] some time trying things in my own trial accounts)

◉ You need a Global Enterprise Cloud Account – i.e. not just a trial account
◉ You need this for both, the SAP Cloud Foundry and the SAP Cloud Neo environment
◉ SAP Cloud Foundry and the SAP Cloud Neo need to be in the same region

SAP Coverage Analyzer

Introduction

What is Coverage Analyzer?

SAP Coverage Analyzer is a very powerful system-wide runtime analysis tool provided by SAP for collecting, monitoring and analyzing the code coverage of test suites such as Self tests, Unit tests, integration tests and Quality tests.