Queue: Allow setting the maximumBatchingWindow

[jakejscott]

Start from the Use-case

Currently the maximumBatchingWindow is hardcoded to 60 seconds (when using standard queue). We would like to be able to configure this. There's even a TODO in the code for adding this as a setting :)

this.configuration.worker.events = [
            // Subscribe the worker to the SQS queue
            {
                sqs: {
                    arn: this.queue.queueArn,
                    batchSize: batchSize,
                    // TODO add setting
                    maximumBatchingWindow: this.queue.fifo ? undefined : 60,
                    functionResponseType: "ReportBatchItemFailures",
                },
            },
        ];

Example Config

constructs:
    my-queue:
        type: queue
        batchSize: 10
        maxBatchingWindow: 5 # <-- add this
        worker:
            handler: src/report-generator.handler

Implementation Idea

NOTE: The maxBatchingWindow setting is in seconds

[jakejscott]

Also in the docs it says:

We recommend setting your queue visibility timeout to six times your function timeout, plus the value of MaximumBatchingWindowInSeconds

Currently I think the visibilityTimeout calculation is not taking into account the 60s default for maxBatchWindow when batchSize > 1

[jakejscott]

Also I'm wondering if the default for maxBatchWindow should be 0 rather than 60 as it might catch people out?

[mnapoli]

Closed by #161