Jblew/firebase-3factor-framework

Go+JS framework for 3factor app

firebase-3factor-framework

Go+JS framework for 3factor app

Firestore job management

Constraints:

• Firestore document allows 1 write/sec

• Firestore path needs to follow a format:

  /collection/doc/collection/doc

A task may have the following states:

1. Waiting
2. Running
3. Done (error/success)
4. Timeout

Format:

/[waiting|running/done/timeout]/{type}/jobs/{id}

Runners:

• job_executor_function<type>
  1. Triggered by creation in /waiting/{type}/jobs/*
  2. Move to /running/{type}/jobs/{id}
  3. Execute
  4. Move to /done/{type}/jobs/{id}
• timeout_returner
  • On schedule (every 5 minutes)
  • If timeoutOn is exceeded, moves task to /waiting/{type}/jobs/*

Firestore simplified job management

• Does not handle timeouts
• Function crashes are silent
• Less costly: less writes/reads
• Faster

Format:

/tasks_xxxcol/[waiting|done]/{type}/jobs/{id}

Runner: job_executor_function<type>:

1. Triggered by creation in /tasks_xxxcol/waiting/{type}/jobs/*
2. Execute
3. Move to /tasks_xxxcol/done/{type}/jobs/{id}

Cost:

• Writes: 2 (creation + move) ($0.039 per 100,000 documents)
• Deletes: 1 (creation + move) ()$0.013 per 100,000 documents)
• Reads: 2 (trigger+run, result read) ($0.013 per 100,000 documents)

Total: 0,117$ per 100,000 tasks