amazon web services - why - google cloud analogy to AWS Lambda
Google Cloud Storage has Object Change Notification. Only web hooks are currently supported at this time.
A client application can send a request to watch for a bucket's change notification events in order to be notified about changes to a bucket's objects. After a notification channel is initiated, Google Cloud Storage notifies the application any time an object is added, updated, or removed from the bucket.
For example, when you add a new picture to a bucket, an application could be notified to create a thumbnail.
More info can be found at: https://cloud.google.com/storage/docs/object-change-notification
I just found out that there is something that looks interesting in the latest documentation of the SDK's command line tool
This sounds exciting.