Add Runtime wrapper command.

examples/complete/README.md

@@ -49,7 +49,7 @@ You can find your API Gateway Endpoint URL in the output values displayed after
 Build your application with the `sam build` command.
 
 ```bash
-zeroae.gate$ sam build
+zeroae.gate$ sam build 
 ```
 
 The SAM CLI installs dependencies defined in `gate-app/build.gradle`, creates a deployment package, and saves it in the `.aws-sam/build` folder.

examples/complete/gate-app/build.gradle

@@ -47,9 +47,8 @@ task packagegapp() {
 
 task gatecloudUnpack(type: Copy) {
     def zipFile = file("application.zip")
-    def outputDir = gateApplicationDir
 
     from zipTree(zipFile)
-    into outputDir
+    into gateApplicationDir
 }
 sourceSets.main.output.dir gateCloudDir, builtBy: gatecloudUnpack

examples/complete/template.yaml

@@ -15,15 +15,33 @@ Globals:
     Timeout: 120
 
 Resources:
+  ZAERuntimeWrapper:
+    Type: AWS::Serverless::LayerVersion
+    Metadata:
+      BuildMethod: makefile
+    Properties:
+      Description: ZeroAE's Runtime Wrapper
+      ContentUri: ../../runtime-wrapper
+      LicenseInfo: "Apache-2.0"
+      RetentionPolicy: Delete
+
   LambdaGateApp:
     Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
     Properties:
       CodeUri: gate-app
       Handler: co.zeroae.gate.App::handleRequest
       Runtime: java8.al2
-      MemorySize: 768
+      MemorySize: 512
+      Layers:
+        - !Ref ZAERuntimeWrapper
       Environment: # More info about Env Vars: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#environment-object
         Variables:
+          AWS_LAMBDA_EXEC_WRAPPER: /opt/bin/wrapper.sh
+          AWS_LAMBDA_EXEC_WRAPPER_EXCLUDE_ARGS: >-
+            -XX:+UseSerialGC
+          JAVA_TOOL_OPTIONS: >-
+            -XX:+PrintGC
+            -XX:+PrintGCDetails
           GATE_APP_NAME: application
           GATE_APP_COST_PER_REQUEST: 1
           GATE_APP_DAILY_QUOTA: 10000

runtime-wrapper/Makefile

@@ -0,0 +1,3 @@
+build-%:
+	mkdir -p "$(ARTIFACTS_DIR)/bin"
+	cp wrapper.sh "$(ARTIFACTS_DIR)/bin"

runtime-wrapper/wrapper.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# the path to the interpreter and all of the originally intended arguments
+args=("$@")
+
+# remove any argument that matches AWS_LAMBDA_EXEC_WRAPPER_EXCLUDE_ARGS
+for index in "${!args[@]}"; do
+  if [[ ${args[$index]} == *$AWS_LAMBDA_EXEC_WRAPPER_EXCLUDE_ARGS* ]]; then
+    unset args[$index]
+  fi
+done
+
+# insert the extra options
+# args=("${args[@]:0:$#-1}" "${extra_args[@]}" "${args[@]: -1}")
+
+# start the runtime with the extra options
+exec "${args[@]}"

template.yaml

@@ -8,6 +8,17 @@ Parameters:
     Description: The Layer version (SNAPSHOT, 1.0.0, etc...)
 
 Resources:
+  ZAERuntimeWrapper:
+    Type: AWS::Serverless::LayerVersion
+    Metadata:
+      BuildMethod: makefile
+    Properties:
+      LayerName: zae-lambda-runtime-wrapper
+      Description: ZeroAE's Runtime Wrapper
+      ContentUri: runtime-wrapper
+      LicenseInfo: "Apache-2.0"
+      RetentionPolicy: Retain
+
   ZAEGateLambdaLayer:
     Type: AWS::Serverless::LayerVersion
     Metadata: