Add SQS event integration

[alexdebrie]

What did you implement:

Adds SQS event integration 🎉

How did you implement it:

EDIT 6/28: SQS integration is live! Full testing instructions below.

I saw Brett Andrews note that Lambda + SQS integration is coming soon. Then I peeked at the SAM implementation of the SQS event. It looks to be very similar to Kinesis / DynamoDB streams as it's a pull-based integration. Like the streams, you can set batch size. There is no need for the startingPosition parameter though.

I found the necessary IAM permissions by looking at the permissions on this role.

How can we verify it:

We need to wait until the integration is actually released. Once it is, you could use the following serverless.yml to test:

# serverless.yml

service: sqs

provider:
  name: aws
  runtime: nodejs6.10

functions:
  hello:
    handler: handler.hello
    events:
      - sqs:
          arn:
            Fn::GetAtt:
              - MyQueue
              - Arn

resources:
  Resources:
    MyQueue:
      Type: "AWS::SQS::Queue"
      Properties:
        QueueName: "MyQueue"

After you deploy, run the following commands with the awscli to put a message into your Queue:

$ QUEUE_URL=`aws sqs get-queue-url --queue-name MyQueue --query 'QueueUrl' --output text`
$ aws sqs send-message --queue-url ${QUEUE_URL} --message-body "test"

Then check to make sure your Lambda fired:

$ sls metrics
Service wide metrics
June 27, 2018 3:16 PM - June 28, 2018 3:16 PM

Invocations: 1
Throttles: 0
Errors: 0
Duration (avg.): 3.63ms

Todos:

• Write tests
• Write documentation
• Fix linting errors
• Make sure code coverage hasn't dropped
• Provide verification config / commands / resources
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[jeremydaly]

I was wondering why this plugin wasn't running!

[alexdebrie]

🙈 Yea, took me a while to find this one 😁

[jeremydaly]

10 is the maximum batch size allowed

[alexdebrie]

Thanks! Updated.

[domaslasauskas]

It's here! 🎉 AWS Lambda Adds Amazon Simple Queue Service to Supported Event Sources

[horike37]

@alexdebrie
Great to see working fine 🎉 🎉 🎉
LGTM

[pmuens]

This is awesome! Thanks for implementing this @alexdebrie 👍 🎉

[QAnders]

Any plans to implement the "Extended Client" functionality as in AWS Java SDK to support messages larger than 256kb by storing the payload/body on S3?

E.g.:

resources:
  Resources:
    MyQueue:
      Type: "AWS::SQS::Queue"
      Properties:
        ExtendedLargeMsg: "MyS3Bucket"
        QueueName: "MyQueue"