AWS Lambda Trigger on S3 in Java | S3 Lambda Trigger in Java | Process CSV file in Lambda on S3 PUT

Lambda Trigger on S3 upload is a very common AWS design and is used very commonly in real-life Cloud Native applications.

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Chapters:
00:00 Introduction
00:20 Agenda
00:57 Important Use Cases
02:26 Lambda Settings
03:52 S3 Request payload Example
05:07 Create S3 bucket and IAM Role
06:41 Create Lambda and Add S3 Trigger
10:21 Write Java code to process CSV
18:46 Test Lambda by Uploading CSV to S3
20:18 AWS Lambda Context
21:09 Test Lambda Retries - Failure Event

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[venkatke]

Excellent video. Just the required information.There is no nonsense in it anywhere. So thankful to you Ajay for putting up this video. You are great!!!

[venkatk]

Thank you so much Ajay! Very good explanation.

[jorgeabelayalamarentes]

Clear explanation, thank you very much!!!

[rushikeshpanchal]

Hello Ajay, could you please add at the end of session regarding aws lambda, s3 prizing so that we can stop those services, It would be helpful for everyone

[sindhum]

Very informative Ajay.. Thanks for the video.. I am trying to implement my class from ApplicationContextInitializer other than RequestHandler. Can you please help e understand the difference between the two and when to go for which approach. Also an example with ApplicationContextInitializer can you please share.

[venkateshthavva]

Nice video... Really helped me a lot.🙏🙂

[ashwinraghunath]

Why is isEmpty() block needed? Lambda will only get evoked when there is a record right?

[Adrianmtz]

Help! Im working with S3 but how do i know in my trigger the cognito sub of the user who made the action?

[amitpadgaonkar]

This is such a good tutorial. Can you please tell me the video software that you use to create these videos?

[oseiasibeybaffour-awuah]

Hi Ajay, thanks for detailed video. What if I want lambda handler to call methods on external class. For instance.
class VersionClass( Amazon s3Client, int version) {
public updateVersion() {
//use member s3Client to update version
}
}
class VersionClient( VersionClass versionClass )

I want a way for handler to know versionClass in VersionClient and call updateVersion on it.

[shubhammahure]

The reporting service (git repository) will have to trigger the backup lambda in case of successful execution of storing the data in .
Trigger the restore lambda in case of unsuccessful execution.

Acceptance Criteria

Restore UDM from backup in case of failure
Backup UDM after successful execution of reporting service batch execution
can you provide me microservice code implementation.

[rajalankar]

Very Informative Ajay!
Is there a way to invoke a lambda trigger which in turn generates files in s3 bucket.

[tanvirkazirocks]

Please make a tutorial for sdk v2 java.

[prathyushadaroor]

Hi Ajay, Thank you for your videos. Could you please let me know how can we overcome lambda runtime issue, if we have data which can take more than 15 minutes. Lambda is invoked by creating a trigger in SQS in my case.

[parthsinghtomar]

my file contents are not showing and it is telling that The code editor does not support the Java 11 (Corretto) runtime. please help

[tanmaysen]

Please can you make a video for the condition like if we have s3 bucket and a CSV file, a lambda function the destination should be SNS. Means the CSV files should further processed to SNS. Please can you help me.

[theyoungpunjab]

Hi Ajay, i was building a lambda I had coded something every similar to you but the issue I’m have it’s not reading in the s3Event I always get false when I’m testing through AWS lambda test

[SharmaGOAT]

Hi anyone knows how to read the multiple CSV files in lambda using java?