How to do it...

1. Create the project from the following template:

$ sls create --template-url https://github.com/danteinc/js-cloud-native-cookbook/tree/master/ch1/event-stream --path cncb-event-stream

2. Navigate to the cncb-event-stream directory with cd cncb-event-stream.
3. Review the file named serverless.yml with the following content:

service: cncb-event-stream

provider:
  name: aws
  runtime: nodejs8.10
  iamRoleStatements:
    - Effect: Allow
      Action:
        - kinesis:PutRecord
      Resource:
        Fn::GetAtt: [ Stream, Arn ]

functions:
  publish:
    handler: handler.publish
    environment:
      STREAM_NAME:
        Ref: Stream

resources:
  Resources:
    Stream:
      Type: AWS::Kinesis::Stream
      Properties:
        Name: ${opt:stage}-${self:service}-s1
        RetentionPeriodHours: 24
        ShardCount: 1
        
  Outputs:
    streamName:
      Value: 
        Ref: Stream
    streamArn:
      Value: 
        Fn::GetAtt: [ Stream, Arn ]

4. Review the file named handler.js with the following content:

const aws = require('aws-sdk');
const uuid = require('uuid');

module.exports.publish = (event, context, callback) => {
  const e = {
    id: uuid.v1(),
    partitionKey: event.partitionKey || uuid.v4(),
    timestamp: Date.now(),
    tags: {
      region: process.env.AWS_REGION,
    },
    ...event,
  }

  const params = {
    StreamName: process.env.STREAM_NAME,
    PartitionKey: e.partitionKey,
    Data: Buffer.from(JSON.stringify(e)),
  };

  const kinesis = new aws.Kinesis();

  kinesis.putRecord(params, callback);
};

5. Install the dependencies with npm install.
6. Run the tests with npm test.
7. Review the contents generated in the .serverless directory.
8. Deploy the stack: 

$ npm run dp:lcl -- -s $MY_STAGE

> cncb-create-stream@1.0.0 dp:lcl <path-to-your-workspace>/cncb-create-stream
> sls deploy -v -r us-east-1 "-s" "john"

Serverless: Packaging service...
...
Serverless: Stack update finished...
Service Information
service: cncb-event-stream
stage: john
region: us-east-1
stack: cncb-event-stream-john
...
functions:
 publish: cncb-event-stream-john-publish

Stack Outputs
PublishLambdaFunctionQualifiedArn: arn:aws:lambda:us-east-1:999999999999:function:cncb-event-stream-john-publish:3
streamArn: arn:aws:kinesis:us-east-1:999999999999:stream/john-cncb-event-stream-s1
streamName: john-cncb-event-stream-s1
...

9. Review the stack, stream, and function in the AWS Console.
10. Invoke the function with the following command:

$ sls invoke -r us-east-1 -f publish -s $MY_STAGE -d '{"type":"thing-created"}'
{
    "ShardId": "shardId-000000000000",
    "SequenceNumber": "49582906351415672136958521359460531895314381358803976194"
}

11. Take a look at the logs: 

$ sls logs -f publish -r us-east-1 -s $MY_STAGE
START ...
2018-03-24 23:20:46 ... event: {"type":"thing-created"}
2018-03-24 23:20:46 ... event:
{
  "type":"thing-created",
  "id":"81fd8920-2fdb-11e8-b749-0d2c43ec73d0",
  "partitionKey":"6f4f9a38-61f7-41c9-a3ad-b8c16e42db7c",
  "timestamp":1521948046003,
  "tags":{
    "region":"us-east-1"
  }
}
2018-03-24 23:20:46 ... params: {"StreamName":"john-cncb-event-stream-s1","PartitionKey":"6f4f9a38-61f7-41c9-a3ad-b8c16e42db7c","Data":{"type":"Buffer","data":[...]}}
END ...
REPORT ... Duration: 153.47 ms    Billed Duration: 200 ms ... Max Memory Used: 39 MB    

12. Remove the stack once you have finished with npm run rm:lcl -- -s $MY_STAGE.