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https://github.com/boyney123/cdk-eventbridge-socket

CDK construct that creates a WebSocket endpoint for you for any EventBridge rule you are interested in. (Built for debugging + testing )
https://github.com/boyney123/cdk-eventbridge-socket

aws aws-construct aws-constructs awscdk cdk cdk-examples eventbridge

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CDK construct that creates a WebSocket endpoint for you for any EventBridge rule you are interested in. (Built for debugging + testing )

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# [cdk-eventbridge-socket](https://boyney123.github.io/cdk-eventbridge-socket/)

This is an AWS CDK Construct that will listen for any EventBridge Bus and Rule and forward that event through a websocket.

**Get setup in seconds and as easy as 7 lines of code.**

### Why

You may want to use tools like [Postman Websockets](https://blog.postman.com/postman-supports-websocket-apis/) or [websocat](https://github.com/vi/websocat) to see and debug what events are being fired through your event bus.

### How

This uses AWS ApiGateway, DynamoDB (to store connections) and Lambda.

![Architecture](architecture.png)

## Installation and Usage

### Typescript

```console
npm install --save cdk-eventbridge-socket
```

```typescript
import * as cdk from '@aws-cdk/core';

import { EventBridgeWebSocket } from 'cdk-eventbridge-socket';

export class EventbridgeWebhooksStack extends cdk.Stack {
constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
super(scope, id, props);

new EventBridgeWebSocket(this, 'sockets', {
bus: 'your-event-bus-name',

// This example shows how to listen for all events
eventPattern: {
account: ['your_account_id'],
},
stage: 'dev',
});
}
}
```

When using the `cdk-eventbridge-socket` the new websocket url will be output on your terminal.

## Usage

There are only a few properties you have to set `bus`, `eventPattern` and `stage`.

You can listen to any EventBridge source/pattern you like, just replace the `eventPattern` with what you want to listen to.

#### Examples

##### Listen for a detailType

```typescript
new EventBridgeWebSocket(this, 'sockets', {
bus: 'your-event-bus-name',

// Listens for all UserCreated events
eventPattern: {
detailType: ['UserCreated'],
},
stage: 'dev',
});
```

##### Listen for a source

```typescript
new EventBridgeWebSocket(this, 'sockets', {
bus: 'your-event-bus-name',

// Listens for all events on source
eventPattern: {
source: ['myapp.users'],
},
stage: 'dev',
});
```

You can find more [here on the AWS documentation](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-events.EventPattern.html)

# Contributing

If you have any questions, features or issues please raise any issue or pull requests you like. I will try my best to get back to you.

# License

MIT.