KinesisStream

The KinesisStream component lets you add an Amazon Kinesis Data Streams to your app.

Minimal example

sst.config.ts

const stream = new sst.aws.KinesisStream("MyStream");

Subscribe to a stream

sst.config.ts

stream.subscribe("src/subscriber.handler");

Link the stream to a resource

You can link the stream to other resources, like a function or your Next.js app.

sst.config.ts

new sst.aws.Nextjs("MyWeb", {
  link: [stream]
});

Once linked, you can write to the stream from your function code.

app/page.tsx

import { Resource } from "sst";
import { KinesisClient, PutRecordCommand } from "@aws-sdk/client-kinesis";

const client = new KinesisClient();

await client.send(new PutRecordCommand({
  StreamName: Resource.MyStream.name,
  Data: JSON.stringify({ foo: "bar" }),
  PartitionKey: "myKey",
}));

---

Constructor

new KinesisStream(name, args?, opts?)

Parameters

• name string

• args? KinesisStreamArgs

• opts? ComponentResourceOptions

KinesisStreamArgs

transform?

Type Object

• stream?

Transform how this component creates its underlying resources.

transform.stream?

Type StreamArgs | (args: StreamArgs, opts: ComponentResourceOptions, name: string) => void

Transform the Kinesis stream resource.

Properties

arn

Type Output<string>

name

Type Output<string>

nodes

Type Object

• stream

The underlying resources this component creates.

nodes.stream

Type Stream

The Amazon Kinesis Data Stream.

SDK

Use the SDK in your runtime to interact with your infrastructure.

---

Links

This is accessible through the Resource object in the SDK.

• name string

Methods

subscribe

subscribe(subscriber, args?)

Parameters

• subscriber string | FunctionArgs | “arn:aws:lambda:${string}”

  The function that’ll be notified.

• args? KinesisStreamLambdaSubscriberArgs

  Configure the subscription.

Returns Output<KinesisStreamLambdaSubscriber>

Subscribe to the Kinesis stream.

sst.config.ts

stream.subscribe("src/subscriber.handler");

Add a filter to the subscription.

sst.config.ts

stream.subscribe("src/subscriber.handler", {
  filters: [
    {
      data: {
        order: {
          type: ["buy"],
        },
      },
    },
  ],
});

Customize the subscriber function.

sst.config.ts

stream.subscribe({
  handler: "src/subscriber.handler",
  timeout: "60 seconds"
});

Or pass in the ARN of an existing Lambda function.

sst.config.ts

stream.subscribe("arn:aws:lambda:us-east-1:123456789012:function:my-function");

static subscribe

KinesisStream.subscribe(streamArn, subscriber, args?)

Parameters

• streamArn Input<string>

  The ARN of the Kinesis Stream to subscribe to.

• subscriber string | FunctionArgs | “arn:aws:lambda:${string}”

  The function that’ll be notified.

• args? KinesisStreamLambdaSubscriberArgs

  Configure the subscription.

Returns Output<KinesisStreamLambdaSubscriber>

Subscribe to the Kinesis stream that was not created in your app.

For example, let’s say you have the ARN of an existing Kinesis stream.

sst.config.ts

const streamArn = "arn:aws:kinesis:us-east-1:123456789012:stream/MyStream";

You can subscribe to it by passing in the ARN.

sst.config.ts

sst.aws.KinesisStream.subscribe(streamArn, "src/subscriber.handler");

Add a filter to the subscription.

sst.config.ts

sst.aws.KinesisStream.subscribe(streamArn, "src/subscriber.handler", {
  filters: [
    {
      data: {
        order: {
          type: ["buy"],
        },
      },
    },
  ],
});

Customize the subscriber function.

sst.config.ts

sst.aws.KinesisStream.subscribe(streamArn, {
  handler: "src/subscriber.handler",
  timeout: "60 seconds"
});

KinesisStreamLambdaSubscriberArgs

filters?

Type Input<Input<Record<string, any>>[]>

Filter the events that’ll be processed by the subscribers functions.

Tip

You can pass in up to 5 different filters.

You can pass in up to 5 different filter policies. These will logically ORed together. Meaning that if any single policy matches, the record will be processed. Learn more about the filter rule syntax.

For example, if your Kinesis stream contains events in this JSON format.

{
  record: 12345,
  order: {
    type: "buy",
    stock: "ANYCO",
    quantity: 1000
  }
}

To process only those events where the type is buy.

{
  filters: [
    {
      data: {
        order: {
          type: ["buy"],
        },
      },
    },
  ],
}

transform?

Type Object

• eventSourceMapping?

Transform how this component creates its underlying resources.

transform.eventSourceMapping?

Type EventSourceMappingArgs | (args: EventSourceMappingArgs, opts: ComponentResourceOptions, name: string) => void

Transform the Lambda Event Source Mapping resource.