Added a js README and updated my java example

Author: FineAndDanD

README.md

@@ -7,7 +7,7 @@ This repository demonstrates how to setup a skeleton coprocessor that simply log
 > 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`
-1. Run the coprocessor from the `/coprocessor` directory with `npm run dev`
+1. Run the coprocessor based on your language of choice by following the README from the appropriate `/*-coprocessor` directory ([javascript](./js-coprocessor/README.md), [Java](./java-coprocessor/README.md)).
 1. In the `/router` directory, download the router by running `./download_router.sh`
 1. In the `/router` directory, compose the schema by running `./create_local_schema.sh`
 1. In the `/router` directory, run the router by running `./start_router.sh`
@@ -21,7 +21,3 @@ Now if you run this code in the browser (http://127.0.0.1:4000/), you will be ab
 In `router/router-config.yaml`, the coprocessor is configured with the Router to be called on the `router` `request` stage.
 
 ### Coprocessor
-
-In `coprocessor/src/index.js`, the coprocessor is setup with `express` to listen to the `/` POST endpoint and respond to the `RouterRequest` stage.
-
-In the `processRouterRequestStage` function, the payload is logged.

java-coprocessor/src/main/java/com/example/demo/RequestHandlers/RouterRequest.java

@@ -8,11 +8,20 @@
 
 public class RouterRequest {
     public RouterRequestBody handle(RouterRequestBody request) {
-        // In this Java sample, we are mapping the request sent by the router to a model called "RouterRequestBody"
-        // Please review that class in the "Models" folder to review what you're able to retrieve at this stage
+        // This is the object sent by the Router that you can act upon to update headers, context, auth claims, etc
         // If you update the "control" property from "Continue" to something like { "break": 400 }, it will terminate the request and return the specified HTTP error
         // See: https://www.apollographql.com/docs/router/customizations/coprocessor/
+        // The object sent by the Router has been mapped to a `RouterRequestBody` object by the `@RequestBody` annotation in the `CoprocessorController` class
+        System.out.println(request.getHeaders());
+        System.out.println(request.getMethod());
+        System.out.println(request.getContext().getEntries());
+        System.out.println(request.getSDL());
+        System.out.println(request.getVersion());
+        System.out.println(request.getBody());
+        System.out.println(request.getStage());
+        System.out.println(request.getPath());
         System.out.println(request.getControl());
+        System.out.println(request.getId());
 
         return request;
     }

js-coprocessor/README.md

@@ -0,0 +1,12 @@
+# Javascript Coprocessor
+
+## Description
+
+In `js-coprocessor/src/index.js`, the coprocessor is setup with `express` to listen to the `/` POST endpoint and respond to the `RouterRequest` stage.
+
+In the `processRouterRequestStage` function, the payload is logged.
+
+## Running the coprocessor
+
+1. Run `npm install` to install dependencies
+1. Run `npm run dev` to start the service