In the Apex version control

We are fairly new to apex, and we plan to create a broad application using the latest version of the Apex. We plan to use Subversion (SVN) version control tool.

We have 3 scenes like

-Development

-Staging

-Production

Our plan is to use the same id of the workspace, the application id and the ID of page in all environments, so that we can apply individual for the pages of the application changes after the initial version is deployed in all 3 environments.

The workflow will be development in the development-> Testing environment in staging-> deploy to Production

What is a good way to make the Apex version control? Is there any other better practical approach that we can use?

Thanks in advance

Hi Dragonia,

Start with, you're in the right direction! The first (step 1) for control of current version of APEX is to have cloned DB systems for DEV/TEST/PROD. This ensures internal APEX IDs are the same in all settings and it will help us to detect only valid changes.

Step 2: export the individual components of the APEX in sql files. Add them to version control.

To export individual components of APEX in the form of sql files, you can use the Java utilities provided by APEX. These classes are under the folder path below APEX zip

\apex\utilities\oracle\apex

APEXExport.class - use this utility to export specified from the specified workspace APEX and DB application

APEXExportSplitter.class - use this utility for dividing bulk single apex sql file into individual sql files (generates an sql for APEX component)

Step 3: when changes are made, rerun the utility of separator and validate the svn changes (you can only commit files sql for components respective apex which you have changed)

Step 4: build patches script to migrate following environment changes (the hard part!)

There is no easy way to do this by their SUMMIT. You must take all the files of sql that you changed, and you must prepare an installation script to run all of these sql files. When you run apex splitter, it gives you all the parts of apex with a well organized with install.sql file folder structure. You can see this install.sql file to prepare your own patches script.

Another difficult point is - some components of the APEX should be deleted before re-creating them. For example if you changed the page 10 and you want to export the following environment changes, then install.sql sample will be as below

-- install.sql
@application/init.sql
@application/set_environment.sql
@application/delete_pages.sql
@application/pages/page_00010.sql
@application/end_environment.sql

And the contents of delete_pages.sql will be as follows

-- delete_pages.sql
SET DEFINE OFF 

BEGIN
    wwv_flow_api.g_mode := 'REPLACE';
END;
/

BEGIN
    wwv_flow_api.remove_page (p_flow_id=>101, p_page_id=>10);
END;
/

And this isn't the end of the story. Some of the changes to shared component can be directly applied to the next environment using sql scripts generated by splitter apex (such as models, methods of application), but some of the shared components cannot be. We must first remove and then we have to recreate it using files sql generated via a dispatcher of the apex. And we need to go through the undocumented internal APEX wwv_flow_api care to know what procedure we use to remove that shared component package.

Also when delete us a page, then all registered users reports public and private will be lost. So before you move your changes to Production, you should export user reports public/private and you should re - install Production DB after the installation of pages.

To summarize, apex version control applications is not hard, but preparation 'delta script or patch' is very difficult.

Hi joelkallman-Oracle, I do remember that you promised to publish a white paper ticket or a blog on this topic. It is already published. If so, can you please share the details. Thanks a lot for your wonderful support in advance.

Kind regards

Hari

Tags: Database

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jmniard wrote:

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