Added executable download and serverless config.

Author: burkat

serverless/serverless.yml

@@ -0,0 +1,29 @@
+service: hyperflow-awslambda-java-executor
+
+provider:
+  name: aws
+  runtime: java8
+  region: eu-west-1
+  memorySize: 512
+  timeout: 60
+  iamRoleStatements:
+    - Effect: "Allow"
+      Action:
+        - "s3:PutObject"
+        - "s3:GetObject"
+      Resource: "arn:aws:s3:::burkat/*"
+
+package:
+  artifact: workflow-java-handler-1.0-SNAPSHOT.jar
+	  
+functions:
+  executor:
+    handler: Handler::handleRequest
+
+    events:
+      - http:
+          path: executor
+          method: get
+      - http:
+          path: executor
+          method: post

src/main/java/Handler.java

@@ -29,6 +29,7 @@ public Response handleRequest(Request request, Context context) {
             logger.log("prefix:     " + request.getOptions().get(PREFIX_KEY));
 
             downloadData(request, logger);
+            downloadExecutable(request, logger);
             execute(request.getExecutable(), String.join(" ", request.getArgs()), logger);
             uploadData(request, logger);
         } catch (Exception e) {
@@ -93,4 +94,11 @@ private Response handleException(Exception e, Request request) {
         return response;
     }
 
+    private void downloadExecutable(Request request, LambdaLogger logger) throws IOException {
+        logger.log("Downloading executable" + request.getExecutable());
+        String key = request.getOptions().get(PREFIX_KEY) + "/" + request.getExecutable();
+        S3Object s3Object = S3Utils.getObject(request.getOptions().get(BUCKET_KEY), key);
+        S3Utils.saveToFile(s3Object, FOLDER_PATH + request.getExecutable());
+    }
+
 }