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():
@@ -140,4 +141,4 @@ print("Lambda Function and S3 Bucket to store the counter are available. Sadly,
 #
 # #response = lClient.create_event_source_mapping(
 # #    EventSourceArn=apiArn,
-# #)
+# #)

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

@@ -1,3 +1,4 @@
+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)