Update for Middy v2 async API

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: [12.x, 14.x]
 
     steps:
       - uses: actions/checkout@v2

README.MD

@@ -1,7 +1,10 @@
-middy-beeline
-===
+[![GitHub release](https://img.shields.io/github/release/resistbot/middy-beeline?include_prereleases=&sort=semver)](https://github.com/resistbot/middy-beeline/releases/) [![Tests](https://github.com/resistbot/middy-beeline/workflows/Tests/badge.svg)](https://github.com/resistbot/middy-beeline/actions?query=workflow:"Tests")
 
-Middy middleware for instrumenting with [Honeycomb](https://honeycomb.io). 
+[![NPM](https://nodei.co/npm/@resistbot/middy-beeline.png?compact=true)](https://npmjs.org/package/@resistbot/middy-beeline)
+
+# middy-beeline
+
+Middy middleware for instrumenting with [Honeycomb](https://honeycomb.io).
 
 ## Getting Started
 
@@ -13,6 +16,7 @@ npm install --save @resistbot/middy-beeline
 ```
 
 Running the tests
+
 ```bash
 npm test
 ```
@@ -47,15 +51,22 @@ module.exports = { handler }
 ```
 
 ## How it works
-The middleware will startup [Beeline for  Nodejs](https://docs.honeycomb.io/getting-data-in/javascript/beeline-nodejs) with the options you configure before your handler runs, create a trace, and add any of the header context you supplied. It adds the `beeline` instance to the handler.event so you can use it in your function- add spans, more context, etc.
+
+The middleware will startup [Beeline for Nodejs](https://docs.honeycomb.io/getting-data-in/javascript/beeline-nodejs) with the options you configure before your handler runs, create a trace, and add any of the header context you supplied. It adds the `beeline` instance to the handler.event so you can use it in your function- add spans, more context, etc.
 
 Once your handler is done, the middleware will close the trace and run a `beeline.flush()` to make sure all the events are sent.
 
 ## Options
+
 Some are obvious from the beeline for nodejs documentation (writeKey, dataset, serviceName, sampleRate) but there are a few extras. Just like the beeline docs say, you can substitute `sampleRate` with `samplerHook: fn()` and the middleware will use your samplerhook function instead of the standard rate.
 
 Also the headerContext list allows you to tell middy-beeline which headers to capture as context and what they should be named. Also by default, any errors are marked as `error:true` and `error_message: <the error message>`. You can change the context key for errors using `errorMessageContext`.
 
 ## Contributing
 
 Feel free to open a Pull Request or Issue w/ a bug report or feature request.
+
+## Creating a release
+
+1. Update `package.json` version element to match the release you'll be using.
+1. Create a new Release once your code is merged. If the two versions match, a new version will be delivered to [npm](https://www.npmjs.com/package/@resistbot/middy-beeline).

index.js

@@ -1,34 +1,30 @@
 let HC_INIT = false;
 
-const setopts = (opts) => {
-  const defaults = {
-    writeKey: 'null',
-    serviceName: '',
-    dataset: 'test',
-    sampleRate: 10,
-    headerContext: [],
-    errorMessageContext: 'error_message',
-  };
+const defaults = {
+  writeKey: 'null',
+  serviceName: '',
+  dataset: 'test',
+  sampleRate: 10,
+  headerContext: [],
+  errorMessageContext: 'error_message',
+};
 
+const honeycombMiddleware = (opts = {}) => {
   const options = { ...defaults, ...opts };
-  return options;
-};
-module.exports = (opts) => ({
-  before: (handler, next) => {
-    const options = setopts(opts);
 
+  const honeycombMiddlewareBefore = (request) => {
     if (!HC_INIT) {
       if (options.samplerHook) {
         // eslint-disable-next-line no-param-reassign, global-require
-        handler.event.beeline = require('honeycomb-beeline')({
+        request.event.beeline = require('honeycomb-beeline')({
           writeKey: options.writeKey,
           samplerHook: options.samplerHook,
           serviceName: options.serviceName,
           dataset: options.dataset,
         });
       } else {
         // eslint-disable-next-line no-param-reassign, global-require
-        handler.event.beeline = require('honeycomb-beeline')({
+        request.event.beeline = require('honeycomb-beeline')({
           writeKey: options.writeKey,
           sampleRate: options.sampleRate,
           serviceName: options.serviceName,
@@ -38,37 +34,42 @@ module.exports = (opts) => ({
       HC_INIT = true;
     } else {
       // eslint-disable-next-line no-param-reassign, global-require
-      handler.event.beeline = require('honeycomb-beeline')();
+      request.event.beeline = require('honeycomb-beeline')();
     }
     // eslint-disable-next-line no-param-reassign
-    handler.event.trace = handler.event.beeline.startTrace();
+    request.event.trace = request.event.beeline.startTrace();
 
     options.headerContext.forEach((head) => {
       const { header, contextname } = head;
-      if (handler.event.headers[header]) {
-        handler.event.beeline.addContext({
-          [contextname]: handler.event.headers[header],
+      if (request.event.headers[header]) {
+        request.event.beeline.addContext({
+          [contextname]: request.event.headers[header],
         });
       }
     });
-    return next();
-  },
-  after: (handler, next) => {
-    handler.event.beeline.finishTrace(handler.event.trace);
-    handler.event.beeline.flush();
-    return next();
-  },
-  onError: (handler, next) => {
-    const options = setopts(opts);
-    if (handler.event.beeline) {
-      handler.event.beeline.addContext({
+  };
+
+  const honeycombMiddlewareAfter = (request) => {
+    request.event.beeline.finishTrace(request.event.trace);
+    request.event.beeline.flush();
+  };
+
+  const honeycombMiddlewareOnError = (request) => {
+    if (request.event.beeline) {
+      request.event.beeline.addContext({
         error: true,
-        [options.errorMessageContext]: handler.error.toString(),
+        [options.errorMessageContext]: request.error.toString(),
       });
-      handler.event.beeline.finishTrace(handler.event.trace);
-      handler.event.beeline.flush();
+      request.event.beeline.finishTrace(request.event.trace);
+      request.event.beeline.flush();
     }
+  };
+
+  return {
+    before: honeycombMiddlewareBefore,
+    after: honeycombMiddlewareAfter,
+    onError: honeycombMiddlewareOnError,
+  };
+};
 
-    return next(handler.error);
-  },
-});
+module.exports = honeycombMiddleware;

index.test.js

@@ -1,29 +1,21 @@
-const middy = require('middy');
 const middyBeeline = require('.');
 
 describe('middy-beeline', () => {
-  it('should extract keys', (done) => {
-    const handler = middy((event, context, callback) => {
-      callback(null, event.extracted);
+  it('should extract keys', () => {
+    const middleware = middyBeeline({
+      writeKey: 'key',
+      serviceName: 'myService',
+      dataset: 'myDataset',
+      samplerHook: () => false,
     });
 
-    handler.use(
-      middyBeeline({
-        writeKey: 'key',
-        serviceName: 'myService',
-        dataset: 'myDataset',
-      }),
-    );
-
     const event = {
       requestContext: {},
       headers: {
         'Content-Type': 'application/json',
       },
     };
-    handler(event, null, (err) => {
-      expect(err).toBe(null);
-      done();
-    });
+    const request = { event };
+    middleware.before(request);
   });
 });

package.json

@@ -1,10 +1,10 @@
 {
   "name": "@resistbot/middy-beeline",
-  "version": "0.1.4",
+  "version": "1.0.0",
   "description": "Middy Middleware for Honeycomb Beeline",
   "main": "index.js",
   "engines": {
-    "node": ">=8.3.0"
+    "node": ">=12.13.0"
   },
   "scripts": {
     "format": "prettier --write .",