FHIR® – Fast Healthcare Interoperability Resources
Tier 1 application: An information system that is vital to the running of an organization.
Example: Software used to run Trains, Flights, Operation theaters…etc
Tier 2 application: This will cause interruption, but not critical.
Example: Ticketing software, Classroom software,…etc
Tier 3 application: Nonimportant. Without them, business operations will continue.
Example: knowledge search software, Homework software,…etc
The view will change based on ownership and need of business.
Based on the tier, the architecture will be defined for the following
1. High Availability
How to provide a tool for business analysts to write logic in simple English? So that it can be used by underlying software without any changes or rewriting.
Answer: DSL – Domain Specific Language
If required we need to develop DSL from scratch for a given domain.
So that BAs can write rules and that should be easy to integrate with code.
https://enotuniq.org/ – Python as DSL
DROOLS Expert Page with DSL
Problem Statement: Customer is restarting PostgreSQL database every night. Long running jobs are failing from after DB restart.
Just to save the trouble of scanning through the PostgreSQL driver release notes, the Connection.setNetworkTimeout() was released in version 42.2.0 of the driver (https://jdbc.postgresql.org/documentation/changelog.html#version_42.2.0)
Check when database was restarted
To get the start time, execute the query below:
psql -c “SELECT pg_postmaster_start_time();”
To get the uptime, execute the query below:
psql -c “SELECT now() – pg_postmaster_start_time();”
Exception Handling for guaranteed write:
boolean writeStatus = false;
write to database;
writeStatus = true;
}catch (Exception ex)
sleep for 30 seconds;
//Hope for db to recover.
Turn your operations procedures into self-service jobs. Safely give others the control and visibility they need.