Dashboard of database free space

Finishing my previous example for multiple IRIS instances, I tried
to compose a local single instance version.  The step from the external
Python app to a version using embedded Python seemed to be obvious.
This was a wrong assumption, as some Python libraries just refused installation
into my local Windows-based environment.

After several frustrating and fruitless attempts, I took a step back rethinking the case.

• IRIS offers DeepSee a ready-to-use set of tools for all kinds of charts
• It is ready to present the base data in tables
• Dashboards allow the combination of graphs and tables on a single screen.
• There is no need for an external store. 
• And COS allows me any odd trick if ever needed.

The final result

The parts to be served

• My Dashboards are a collection of Table views and  Charts
• Tables and Charts are generated from Pivots created in Analyzer
• I use 2 pivots
  1. based on raw numbers,
  2. based on $ZLOG(numbers) for better scaling of the chart  
• Content for the Pivots comes from 2 separate Cubes
• The Cubes are designed with DeepSee Architect from a persistent class
• The class is refreshed for each view by a Class-Query in %SYS
• To avoid useless Journal records, I use a temporary table in IRISTEMP
• Finally, a Portlet provides the actual timestamp of the snapshot

The processing steps 

• A CSP page is called by its URL
• In method OnPreHTTP
  • The System Query fills the temp table from %SYS
  • Then both cubes are rebuilt
  • Finally, the Dashboard is launched by server-side redirection
• The content of the initial CSP page is irrelevant and therefore empty

GitHub