changed Lambda demo to support AWS Academy and create individual bucket for...

changed Lambda demo to support AWS Academy and create individual bucket for group with globally unique name in S3

example-projects/counter-demo/aws-lambda/invoke-function.py

@@ -36,8 +36,10 @@ except lClient.exceptions.ResourceNotFoundException:
 
 streamingBody = response['Payload']
 result = streamingBody.read()
+jsonResult = json.loads(result)
 
 print(json.dumps(response, indent=4, sort_keys=True, default=str))
 
-print('Payload:\n' + str(result))
+print('Payload:\n' + str(result) + "\n")
 
+print("Counter is now at: " + jsonResult['headers']['x-hsfd-counter'])

example-projects/counter-demo/aws-lambda/lambda_function.py

@@ -46,6 +46,7 @@ def lambda_handler(event, context):
         'statusCode': 200,
         'headers': {
             'Content-Type': 'text/html',
+            'x-hsfd-counter': str(counter)
         },
         'body': output
     }

example-projects/counter-demo/aws-lambda/start.py

@@ -35,6 +35,7 @@ roleName = 'arn:aws:iam::488766701848:role/LabRole'
 #
 ################################################################################################
 
+
 def cleanup_s3_bucket(s3_bucket):
     # Deleting objects
     for s3_object in s3_bucket.objects.all():

example-projects/counter-demo/aws-lambda/stop.py

+from datetime import date
 import boto3
 
 ################################################################################################
@@ -6,6 +7,15 @@ import boto3
 #
 ################################################################################################
 
+# you need to create a bucket in S3, here in this demo it is called "cloudcomp-counter", but
+# bucket names need to be world wide unique ;) The demo looks for a file that is named
+# "us-east-1" (same as our default region) in the bucket and expects a number in it to increase
+
+groupNr = 22
+currentYear = date.today().year
+
+globallyUniqueS3GroupBucketName = "cloudcomp-counter-" + str(currentYear) + "-group" + str(groupNr)
+
 # region = 'eu-central-1'
 region = 'us-east-1'
 functionName = 'cloudcomp-counter-lambda-demo'
@@ -19,7 +29,18 @@ roleName = 'arn:aws:iam::919927306708:role/cloudcomp-s3-access'
 ################################################################################################
 
 
+def cleanup_s3_bucket(s3_bucket):
+    # Deleting objects
+    for s3_object in s3_bucket.objects.all():
+        s3_object.delete()
+    # Deleting objects versions if S3 versioning enabled
+    for s3_object_ver in s3_bucket.object_versions.all():
+        s3_object_ver.delete()
+
+
 client = boto3.setup_default_session(region_name=region)
+s3Client = boto3.client('s3')
+s3Resource = boto3.resource('s3')
 lClient = boto3.client('lambda')
 
 
@@ -31,3 +52,13 @@ try:
     )
 except lClient.exceptions.ResourceNotFoundException:
     print('Function not available. No need to delete it.')
+
+print("Deleting old bucket...")
+print("------------------------------------")
+
+try:
+    currentBucket = s3Resource.Bucket(globallyUniqueS3GroupBucketName)
+    cleanup_s3_bucket(currentBucket)
+    currentBucket.delete()
+except ClientError as e:
+    print(e)