Use AWS Lambda instead of Docker to compile Java

Author: 64json

CONTRIBUTING.md

@@ -20,10 +20,14 @@ Are you a first-timer in contributing to open source? [These guidelines](https:/
 
 4. Create `.env.local` in the project root:
     ```bash
+    # By putting dummy values, GitHub sign in will not work locally
     GITHUB_CLIENT_ID = dummy
     GITHUB_CLIENT_SECRET = dummy
+
+    # By putting dummy values, extracting visualizing commands will not work locally (except for JavaScript).
+    AWS_ACCESS_KEY_ID = dummy
+    AWS_SECRET_ACCESS_KEY = dummy
     ```
-    It's safe to put any dummy value to them unless you need the GitHub sign in functionality locally.
 
 5. Install dependencies, and run the server.
 

package-lock.json

@@ -26,6 +26,7 @@
     "tslint": "^5.16.0"
   },
   "dependencies": {
+    "aws-sdk": "^2.480.0",
     "axios": "^0.19.0",
     "body-parser": "^1.18.2",
     "compression": "^1.7.3",

package.json

@@ -27,6 +27,9 @@ const {
 
   GITHUB_CLIENT_ID,
   GITHUB_CLIENT_SECRET,
+
+  AWS_ACCESS_KEY_ID,
+  AWS_SECRET_ACCESS_KEY,
 } = process.env;
 
 const isEnabled = (v: string) => v === '1';
@@ -48,6 +51,8 @@ const missingVars = [
   ] : []),
   'GITHUB_CLIENT_ID',
   'GITHUB_CLIENT_SECRET',
+  'AWS_ACCESS_KEY_ID',
+  'AWS_SECRET_ACCESS_KEY',
 ].filter(variable => process.env[variable] === undefined);
 if (missingVars.length) throw new Error(`The following environment variables are missing: ${missingVars.join(', ')}`);
 
@@ -71,3 +76,6 @@ export const credentials: ServerOptions | undefined = isEnabled(CREDENTIALS_ENAB
 
 export const githubClientId = GITHUB_CLIENT_ID;
 export const githubClientSecret = GITHUB_CLIENT_SECRET;
+
+export const awsAccessKeyId = AWS_ACCESS_KEY_ID;
+export const awsSecretAccessKey = AWS_SECRET_ACCESS_KEY;

src/config/environments.ts

@@ -15,8 +15,6 @@ export class DockerTracer extends Tracer {
     super(lang);
     this.directory = path.resolve(__dirname, lang);
     this.imageName = `tracer-${this.lang}`;
-
-    this.build = this.build.bind(this);
   }
 
   build(release: Release) {

src/tracers/DockerTracer.ts

@@ -0,0 +1,33 @@
+import AWS from 'aws-sdk';
+import express from 'express';
+import { Release, Tracer } from 'tracers/Tracer';
+import { awsAccessKeyId, awsSecretAccessKey } from 'config/environments';
+import { BadRequest } from 'ts-httpexceptions';
+
+export class LambdaTracer extends Tracer {
+  static lambda = new AWS.Lambda({
+    region: 'us-east-2',
+    accessKeyId: awsAccessKeyId,
+    secretAccessKey: awsSecretAccessKey,
+  });
+
+  async build(release: Release) {
+  }
+
+  route(router: express.Router) {
+    router.post(`/${this.lang}`, (req, res, next) => {
+      const {code} = req.body;
+      LambdaTracer.lambda.invoke({
+        FunctionName: `extractor-${this.lang}`,
+        InvocationType: 'RequestResponse',
+        Payload: JSON.stringify(code),
+      }, function (err, data) {
+        if (err) return next(err);
+        if (typeof data.Payload !== 'string') return next(new Error('Unexpected Payload Type'));
+        const payload = JSON.parse(data.Payload);
+        if (!payload.success) return next(new BadRequest(payload.errorMessage));
+        res.send(payload.commands);
+      });
+    });
+  }
+}

src/tracers/LambdaTracer.ts

@@ -1,6 +1,6 @@
-import { DockerTracer } from 'tracers/DockerTracer';
+import { LambdaTracer } from 'tracers/LambdaTracer';
 
-export class JavaTracer extends DockerTracer {
+export class JavaTracer extends LambdaTracer {
   constructor() {
     super('java');
   }