Coprocessor "Hello World"

This repository demonstrates how to setup a skeleton coprocessor that simply logs the payload from the Router.

Running the Example

Note: To run this example, you will need a GraphOS Enterprise plan and must create /router/.env based on /router/.env.example which exports APOLLO_KEY and APOLLO_GRAPH_REF.

1. Run the subgraph from the /subgraph directory with npm run dev
2. Run the coprocessor based on your language of choice by following the README from the appropriate /*-coprocessor directory (javascript, Java, golang).
3. In the /router directory, download the router by running ./download_router.sh
4. In the /router directory, compose the schema by running ./create_local_schema.sh
5. In the /router directory, run the router by running ./start_router.sh

Now if you run this code in the browser (http://127.0.0.1:4000/), you will be able to query the router and you will see the payload logged in the terminal by the coprocessor.

Code Highlights

Coprocessor Configuration

In router/router-config.yaml, the coprocessor is configured with the Router to be called on the router request stage.

Coprocessor