Add S3EventSource Not Possible with Existing Bucket

[joncantu]

I have an existing bucket that I would like to trigger a lambda whenever a zip file is uploaded so that the lambda can unzip it and process the unzipped files.

However, I cannot add S3EventSource to an existing S3 bucket. For example, this fails to compile:

    const filesBucket = s3.Bucket.fromBucketName(this, 'SBFilesBucket', props.s3Bucket);

    fileUnzipAdaptor.addEventSource(new S3EventSource(filesBucket, {
      events: [s3.EventType.OBJECT_CREATED],
      filters: [{suffix: 'zip'}] // optional
    }));

The error is:

error TS2345: Argument of type 'IBucket' is not assignable to parameter of type 'Bucket'.
  Type 'IBucket' is missing the following properties from type 'Bucket': autoCreatePolicy, lifecycleRules, notifications, metrics, and 25 more.

Is this by design? If so, how else can I obtain the desired effect?

Reproduction Steps

    const filesBucket = s3.Bucket.fromBucketName(this, 'SBFilesBucket', props.s3Bucket);

    fileUnzipAdaptor.addEventSource(new S3EventSource(filesBucket, {
      events: [s3.EventType.OBJECT_CREATED],
      filters: [{suffix: 'zip'}] // optional
    }));

Where props.s3Bucket is the name of a existing S3 bucket.

Error Log

error TS2345: Argument of type 'IBucket' is not assignable to parameter of type 'Bucket'.
  Type 'IBucket' is missing the following properties from type 'Bucket': autoCreatePolicy, lifecycleRules, notifications, metrics, and 25 more.

Environment

• CLI Version :
• Framework Version:
• OS :
• Language :

Other

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This is 🐛 Bug Report

[joncantu]

@eladb
Going with

import s3_notify = require('@aws-cdk/aws-s3-notifications');

This doesn't work either:

    filesBucket.addEventNotification(s3.EventType.OBJECT_CREATED,
        new s3_notify.SqsDestination(ZipFileUploadQueue),
        { prefix: 'foo/', suffix: '.zip' });

I get the following error:

error TS2339: Property 'addEventNotification' does not exist on type 'IBucket'.

[joncantu]

So I basically need to just setup a SNS topic for ALL file uploads to a bucket and filter inside of my lamba which is less than ideal.

[joncantu]

@eladb I would argue that this is actually a bug not a feature request. Why would you not be able to perform actions such as addEventNotification to an existing bucket? This somehow seems wrong to me. Unless there is an alternative way to do this without having to create an entirely new bucket.

[aruneko]

I have same problem now.
An stack overflow user solves this problem with AwsCustomResource. But I think it is not smart. I would be happy to solve this problem by updating CDK.

[eladb]

Duplicate with #2004

[xiangweilee]

this feature should be supported from the beginning