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Updated SRM processing to Singleton Lambda pattern #448

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Aug 6, 2024
Merged

Updated SRM processing to Singleton Lambda pattern #448

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8 changes: 8 additions & 0 deletions lib/workload/stateless/stacks/sequence-run-manager/deploy/stack.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -133,10 +133,18 @@ export class SequenceRunManagerStack extends Stack {
}

private createProcSqsHandler() {
/**
* For `reservedConcurrentExecutions 1` setting, we are practising Singleton Lambda pattern here.
* See https://umccr.slack.com/archives/C03ABJTSN7J/p1721685789381979 for context.
* SRM processing is low volume event with time delay friendly (so to speak upto some minutes).
* We also make SQS to complimenting delayed queue. See https://github.com/umccr/infrastructure/pull/469
*/
const procSqsFn = this.createPythonFunction('ProcHandler', {
index: 'sequence_run_manager_proc/lambdas/bssh_event.py',
handler: 'sqs_handler',
timeout: Duration.minutes(2),
memorySize: 512,
reservedConcurrentExecutions: 1,
});

this.mainBus.grantPutEventsTo(procSqsFn);
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