Session

A session is a means for interacting with Projects in the Tygron Platform. A session has several stages:

• Project startup phase, in which the project is initiated into computer memory.
• A live phase, in which the user can interact with the project.
• A save phase, in which the project data is stored from memory to hard disk.
• A close phase, in which the session's processes are neatly terminated and the session's data is removed from memory.

A session can be interacted with by multiple users at the same time. A session will generally be shut down once all users have logged out of the session. However, when chosen, a session can also be kept alive for longer periods of time.

There are several reasons to keep a session alive:

• The user has to wait on a result of a long computation.
• The project acts as a web service, such as WFS or WMS and can be updated in the mean time.

Interaction with a session can be restricted in functionality, based on the chosen startup mode.

• Editor mode allows users to adjust the initial state of a project. Additionally, test-runs can be activated within this session to test future scenarios. Restrictions concerning test-runs in editor mode can be found here.
• Single and multi-user mode allows users to only adjust the future state of a project. The initial state will remain the same, and indicators and overlays can refer to this initial state to show the improvements and progress being made.