Advanced features

This section introduces most of Procrastinate’s advanced features.

• Get more context for task execution
• Ensure jobs run sequentially and in order
• Launch a job in the future
  • From the code
  • From the command line
• Ensure tasks don’t accumulate in the queue
• Launch a task periodically
  • Caveats
  • Timestamp argument
  • Scheduling a job multiple times with multiple arguments
  • Using cron
  • Dynamic scheduling
• Define a retry strategy on a task
  • Simple strategies
  • Advanced strategies
  • Implementing your own strategy
• Add a task middleware
• Get statistics regarding job executions
• Control the way synchronous calls to defer are handled
  • SyncPsycopgConnector
  • Psycopg2Connector
  • SQLAlchemyPsycopg2Connector
  • Having multiple apps
  • Procrastinate’s automatic connector selection
• Define custom JSON encoders and decoders
• Create modular collections of tasks by using Blueprints