Skip to Content

Exercises

Version 7.1 by Carlijn Kokkeler on 2022/09/30 09:54

In this microlearning, we will educate you on what we mean when we talk about message definitions.

Should you have any questions, please contact academy@emagiz.com.

1. Prerequisites

  • Basic knowledge of the eMagiz platform

2. Key concepts

This microlearning centers around understanding the concept data modeling in design.

3. CDM, CDM & system message, message mapping

By following the steps below, you should gain a better understanding of the differences between CDM, CDM messages, and system messages.
  

3.1 Creating a CDM

Please add the following entities and attributes to your CDM:
  

  • Person, with attributes ID, Name, and Email
  • PlatformCourse, with attributes ID and Name

One person has access to many platform courses. It should look like the following:

data-modeling-in-design-exercises--adding-attributes-entities-CDM.png

3.2 Creating a CDM message

Now, go to your CDM message and add the Person and PlatformCourse to your message definition, including all attributes. It should look like the following:
 
data-modeling-in-design-exercises--adding-message-definition-CDM-message.png
  

3.3 Creating a system message

In System message, create the following entities and attributes:
  

  • User, with attributes ID and Name
  • Course, with attributes ID and Name

One user has access to many courses. It should look like the following:

data-modeling-in-design-exercises--adding-attributes-entities-system-message.png

Now, remove the attribute Name in Course by using the Toggle canvas edit mode. It should result in the following:

data-modeling-in-design-exercises--remove-attribute-system-message.png
  

3.4 Complete message mapping

Now that you have completed these steps, go to Message mapping and complete the mapping.

data-modeling-in-design-exercises--complete-message-mapping.png
  

4. Assignment

Navigate to Design and open the message definition option of at least one integration within your project.
This assignment can be completed within the (Academy) project that you have created/used in the previous assignment.

5. Key takeaways

  • A message definition is a visual representation of how the elements are related to each other, whether they are mandatory and the data types they have that can be used in the message mapping
  • Some message definitions are specific to a system. Others are generic across systems

6. Suggested Additional Readings

If you are interested in this topic and want more information on it please read the help text provided by eMagiz. Furthermore check out these links if you want a more in-depth knowledge of the eMagiz data models:

  • [API Gateway model](crashcourse-api-gateway-api-data-model.md)
  • [Understanding the eMagiz CDM](crashcourse-messaging-what-is-cdm.md)
  • [Event Streaming data model](intermediate-configuring-event-streaming-data-model.md)

7. Silent demonstration video

This video demonstrates a working solution and how you can validate whether you have successfully completed the assignment.

Warning

Video attachment not found.