tky / app-sync-example

Minimal App Sync Example

This is a minimal App Sync Example using Subscripion.

Getting Started

Create AWS resources.

$ cd cdk
$ cdk deploy app-sync-example-stack

Subscribe

Get API URL and API Key from a AWS AppSync Settings and put it to environmental variables.

$ export API_ENDPOINT="<API_URL>"
$ export API_KEY="<API_KEY>"

Run th python script to subscribe.

$ cd scripts
$ pipenv install
$ pipenv shell
$ python subscribe.py

Now you can see the following message.

Host: <YOUR_HOST>
Waiting for messages...

Mutate

Open another terminal and export environmental variables again.

Put a query and exceute to use gq.

export QUERY='
  mutation AddUser {
    addUser(id: "user1", input: {age: 22, name: "first user"}) {
      age
      id
      name
    }
  }
'

$ gq ${API_ENDPOINT} -H "x-api-key:${API_KEY}" -q "${QUERY}"

Executing query... done
{
  "data": {
    "addUser": {
      "age": 22,
      "id": "user1",
      "name": "first user"
    }
  }
}

And the subscribed terinal get a message.

{'updatedUser': {'age': 22, 'id': 'user1', 'name': 'first user'}}