tmarwen / micronaut-microstream-integration

Micronaut MicroStream integration

Micronaut - MicroStream integration

---

Feature description

This project is an intent to present an experiment of Micronaut to MicroStream integration.

The feature exposes the MicroStream graph data as a GraphQL schema.

All that the user has to do is to create it MicroStream graph model and annotation the root entity with the @Root annotation.

All the heavy lifting is automagically done through Micronaut annotation processing (part of it is at compile time) and the user data is accessible through the exposed /graphql endpoint.

A lot of work remains to do within this project, part of it:

• Handle GraphQL mutations
• Full MicroStream configuration through property sources
• ...

Chat (Sample application)

The Gradle subproject chat-application holds a sample main application showcasing the feature capabilities (due to time shortage I could not do more than the sample showcase).

Navigate to the module directory and run below command (after having built the micronaut-microstream-graph module:

$ ./gradlew run

Open a web browser and navigate to http://localhost:8080/graphiql and play with some queries.

Here down a sample GraphQL query:

query {
  threads {
    name,
    members {
      username
    },
    messages {
      author {
        username
      },
      content,
      createdAt
    }
  }
  users {
    username,
    email
  }
}

and here down the results:

{
  "data": {
    "threads": [
      {
        "name": "hackathon.microstream.on",
        "members": [
          {
            "username": "tmarouane"
          }
        ],
        "messages": [
          {
            "author": {
              "username": "tmarouane"
            },
            "content": "MicroStream is cool!",
            "createdAt": "2021-02-28T23:16:17.674570Z"
          },
          {
            "author": {
              "username": "tmarouane"
            },
            "content": "MicroStream is cool!",
            "createdAt": "2021-02-28T23:16:17.674598Z"
          }
        ]
      }
    ],
    "users": [
      {
        "username": "tmarouane",
        "email": "[email protected]"
      }
    ]
  }
}