WIP: Experimental layers support

build.gradle

@@ -41,5 +41,22 @@ task buildZipFull(type: Zip) {
     }
    }
 }
+
+task buildZipCode(type: Zip) {
+  baseName = "serverless-java-spring-boot-code"
+  from compileJava
+  from processResources
+}
+
+task buildLayerZip(type: Zip) {
+    baseName = "serverless-java-spring-boot-layer1"
+    into("java/lib") {
+        from(configurations.compileClasspath) {
+            exclude 'tomcat-embed-*'
+        }
+    }
+}
 
 build.dependsOn buildZipFull
+build.dependsOn buildZipCode
+build.dependsOn buildLayerZip

deploy-to-aws

@@ -22,9 +22,20 @@ function parse_yaml {
 
 eval $(parse_yaml sam-template.yaml)
 
+#LAYER_PACKAGE=build/distributions/serverless-java-spring-boot-layer1.zip
+#LAYER_NAME=`basename $LAYER_PACKAGE`
+#
+#aws s3 cp $LAYER_PACKAGE s3://${S3_BUCKET}/$LAYER_NAME
+#aws lambda publish-layer-version --layer-name serverless-java-spring-boot-layer1 \
+#    --content S3Bucket=${S3_BUCKET},S3Key=${LAYER_NAME} \
+#    --compatible-runtimes java8
+#LAYER_ARN=`aws lambda list-layer-versions --layer-name serverless-java-spring-boot-layer1 --max-items 1 | jq ".LayerVersions[0].LayerVersionArn" -r`
+#echo "JAR layer ARN: ${LAYER_ARN}"
+
 aws cloudformation package --template-file sam-template.yaml --s3-bucket ${S3_BUCKET} --s3-prefix java --output-template-file sam-package.yaml
 
 PARAMS="SNSTopic=${SNS_TOPIC} SQSQueue=${SQS_QUEUE}"
+# CodeLayers=${LAYER_ARN}
 
 aws cloudformation deploy --template-file sam-package.yaml --stack-name ServerlessSpringApi --parameter-overrides ${PARAMS} --capabilities CAPABILITY_IAM
 

sam-local

@@ -1,4 +1,9 @@
 #!/bin/bash
 
-sam local start-api --debug --skip-pull-image -s public -t sam-template.yaml -p 3000 -n sam-local-env.json 
+LAYER_ARN=`aws lambda list-layer-versions --layer-name serverless-java-spring-boot-layer1 --max-items 1 | jq ".LayerVersions[0].LayerVersionArn" -r`
+echo "JAR layer ARN: ${LAYER_ARN}"
+
+PARAMS=ParameterKey=CodeLayers,ParameterValue=${LAYER_ARN}
+
+sam local start-api --debug --skip-pull-image -s public -t sam-template.yaml -p 3000 -n sam-local-env.json --parameter-overrides ${PARAMS}
 

sam-template.yaml

@@ -14,6 +14,8 @@ Parameters:
     Type: String
   SQSQueue:
     Type: String
+#  CodeLayers:
+#    Type: CommaDelimitedList
 
 Resources:
   ApiGatewayApi:
@@ -24,16 +26,27 @@ Resources:
       Variables:
         Stage:
           Ref: Stage
+  MyServiceLayer:
+    Type: AWS::Serverless::LayerVersion
+    Properties:
+      LayerName: serverless-java-spring-boot-layer1
+      ContentUri: "build/distributions/serverless-java-spring-boot-layer1.zip"
+      CompatibleRuntimes:
+        - java8
+      RetentionPolicy: Retain
   MyServiceFunction:
     Type: AWS::Serverless::Function
     FunctionName: "ServerlessSpringApi-MyServiceFunction"
     Properties:
       Handler: my.service.StreamLambdaHandler::handleRequest
       Runtime: java8
-      CodeUri: "build/distributions/serverless-java-spring-boot.zip"
+      CodeUri: "build/distributions/serverless-java-spring-boot-code.zip"
       MemorySize: 2048
       Policies: AWSLambdaBasicExecutionRole
       Timeout: 30
+      Layers:
+#        Ref: CodeLayers
+        - !Ref MyServiceLayer
       Environment:
         Variables:
           # Specify here variables for deployment,