Concept

This section will guide you to understand the concept of some key elements in OpenCatapult system.

Concept

After setting up a new OpenCatapult instance, you will get a blank workspace. You can start to fill it with:

  • User Account

  • Project

  • External Service Connection

  • Engine Registration

  • Task Provider Registration

User Account

Administrators can add as many application users as they want. Each user can be assigned to a different role which will affect on her ability to access OpenCatapult elements.

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Project

Project is a unit of work which your team will usually work with to create an application.

In this Project scope, you can define:

  • Project Member

  • Data Model

  • Job Definition

  • Job Queue

Project Member

Project member is user who has certain access to a project with specific role. Project member should be an active application user.

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Data Model

Data Model is a logical structured entity which is used by code generators for various purposes. It is usually used to generate tables in database, controllers, pages, etc.

Data Model consists of many Properties, which usually can be translated into columns in database world.

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Job Definition

Job Definition is a unit of work which is used to define specific action. It may consist of many Task definitions.

For example, you can define a job which will sequentially execute the following tasks: generate code, push it to a code repository, and deploy it to a hosting service.

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Job Queue

After defining Job, you can put it in Queue so the Engine can pick and execute it.

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External Service Connection

When defining a Job, it is often that you need to include some information which is required to connect to external services, e.g. GitHub, Azure, etc. Instead of filling them directly in Task definition, it is recommended that you fill them via External Service Connection. It will give you some advantages:

  • you don't need to enter the same information over and over again in different Tasks

  • it can be reused accross projects

  • it is more secure because the values are encrypted

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Engine Registration

Engine is a component in OpenCatapult which will execute queued jobs. For scaling purpose you can have multiple Engine instances in a OpenCatapult system. However you need to register them in advance to give them permission to access certain elements.

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Task Provider Registration

Task provider is the extension of Engine which implement specific action. Task provider needs to be registered as well to:

  • allow task provider to ask for specific configuration input from user

  • allow syncronization of the installed task providers across Engine instances

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