topic Re: AWS S3 file properties in Talend Studio

AWS S3 file properties

Anonymous — Mon, 17 Jul 2017 14:22:50 GMT

Hello,

I would like to know if there is a way to get file properties (like size, timestamp) of a file places in S3 bucket.

I have tried the following but unable to get file size and timestamps. Also does this differ if the file in S3 bucket is .gz file.

tS3 Connection

tS3FileList --iterate--> tFIleProperties --iterate--> tIterateToFlow --main--> tLogRow

Thanks,

Re: AWS S3 file properties

Anonymous — Tue, 18 Jul 2017 09:11:07 GMT

Hello,

So far, you have to retrieve your files from S3 and keep them on local firstly.

The work flow should be: tS3Connection-->tS3Get-->tFileProperties

Best regards

Sabrina

Re: AWS S3 file properties

Anonymous — Tue, 18 Jul 2017 09:35:55 GMT

Thanks Sabrina for your reply. If that's the only way then I'll take it..

Re: AWS S3 file properties

Anonymous — Mon, 24 Jul 2017 07:52:57 GMT

As we have a client restriction not to download the file locally,canu please let us knw if there is a way other than downloading? or download/read file properties and delete in one component soo that we cant eve break this flow .ultimatley we shd nt have any control on seeing the file content.

Re: AWS S3 file properties

Sid3 — Fri, 25 Aug 2017 13:35:39 GMT

Hi Sabrina,

tS3Connection-->tS3Get-->tFileProperties

In this approach once file gets downloaded(using ts3Get) it will have current time stamp on it. we will not get the actual time stamp which it has in S3 bucket.

how to get the time stamp of file without downloading from server?

Any inputs?

Thanks,
Sid

Re: AWS S3 file properties

Sid3 — Mon, 28 Aug 2017 10:12:55 GMT

Hi Folks,

Any suggestions here?

Thanks,

Sid

Re: AWS S3 file properties

Sid3 — Tue, 29 Aug 2017 13:54:05 GMT

Hi Guys,

I got the work around for this issue. It's using S3 Command line.

PFA job,component and console output images.

Thanks,

Sid

connsle_output.JPG
tjava_comp_properties.JPG
tsystem_comp_properties.JPG
S3Filepropertiesjob.JPG

Re: AWS S3 file properties

Anonymous — Tue, 20 Mar 2018 21:08:06 GMT

Hi Sid

I tried to follow your approach, but I get an error...see the thread : https://community.talend.com/t5/Design-and-Development/unable-to-execute-command-using-tSystem-component/m-p/54194/highlight/false#M18401

Re: AWS S3 file properties

Anonymous — Tue, 14 Aug 2018 10:42:01 GMT

Hi,

I have got same constraints. Cannot download the file locally.

We can use AWS CLI however then go off from using the components. As a suggestion can we have something in S3Get or a seperate component to read the file properties on S3?

Re: AWS S3 file properties

PhilHibbs — Tue, 04 Feb 2020 12:03:36 GMT

Bumping this thread - has anything changed in the last 2 years? I can't see anything in the v7.0 docs.

I want to check to see if the files all have timestamps that are close together, i.e. there are no files left over from a previous day. There are hundreds of files and they are all many gigabytes so I can't download them!

Re: AWS S3 file properties

PhilHibbs — Tue, 04 Feb 2020 15:06:02 GMT

Additionally, all of the suggestions of "download the file and check the timestamp" are no use since the tS3Get component gives the file a timestamp of the time the download was done, it does not replicate the S3 timestamp of the file onto the local file.

Re: AWS S3 file properties

PhilHibbs — Tue, 04 Feb 2020 17:00:34 GMT

SOLVED!

If your tS3List component is called, for example, tS3List_1, simply add the following entry to a Date column in the subsequent tIterateToFlow:

objectSummary_tS3List_1.getLastModified()

This is relying on undocumented internal variables. I have tested it in Talend v6.3 and 7.1. Another drawback is that if you copy and paste a pair of components, the globalMap.get("tS3List_1_CURRENT_KEY") call will be updated with the new component name, but the internal variable objectSummary_tS3List_1 will not be.