fix: TT-252 Refactor of the python-functions

Author: test

nodejs-functions/serverless.yml

@@ -19,7 +19,7 @@ provider:
 custom:
     globalSchedule: cron(0 0 * * *)
 plugins:
-    - serverless-azure-functions
+  - serverless-azure-functions
 package:
     exclude:
         - local.settings.json

python-functions/README.md

@@ -1,3 +1,63 @@
 # Azure Functions
 
-Refer to [Serverless docs](https://serverless.com/framework/docs/providers/azure/guide/intro/) for more information.
+ 
+# CosmosDB bindings with Serverless Framework:
+ 
+To use CosmosDB bindings modify the host.json on your main folder to:
+``` yaml
+{
+  "version": "2.0",
+  "extensionBundle": {
+    "id": "Microsoft.Azure.Functions.ExtensionBundle",
+    "version": "[1.*, 2.0.0)"
+  }
+}
+ ```
+ 
+## There is two types of CosmosDB bindings: 
+### "cosmosdbtrigger" 
+ 
+The Azure Cosmos DB Trigger uses the Azure Cosmos DB Change Feed to listen for inserts and updates across partitions. The change feed publishes inserts and updates, not deletions.
+ 
+To set-up this binding in the serverless framework, add this event to the serverless.yml
+ ``` yaml
+events:
+      - cosmosDB: true
+        x-azure-settings:
+          name: documents # name of input parameter in function signature
+          databaseName: <dbName>
+          direction: in
+          leaseCollectionName: leases
+          connectionStringSetting: <ConnectionStringToTheCosmosDB>
+          collectionName: <collectionName>
+          createLeaseCollectionIfNotExists: true
+          leaseCollectionPrefix: <prefixUsedIntheLeaseDB>
+ ```
+ 
+### "cosmosdb"
+ 
+The Azure Cosmos DB output binding lets you write a new document to an Azure Cosmos DB database using the SQL API.
+To set-up this binding in the serverless framework, add this event to the serverless.yml
+ ``` yaml
+      - cosmosDB: true
+        x-azure-settings:
+          direction: out
+          name: events # name the output in function signature 
+          databaseName: <dbName>
+          collectionName: <collectionName>
+          leaseCollectionName: leases
+          createLeaseCollectionIfNotExists: true
+          connectionStringSetting: <ConnectionStringToTheCosmosDB>
+          createIfNotExists: true # A boolean value to indicate whether the collection is created 
+ ```
+Problems with the CosmosDB bindings and the serverless framework: 
+If there is only one event with the direction set to out, the serverless framework will change the name of this binding to “$return” this will cause problems because this name needs to be the same as the defined in the  function signature, to solve this, instead of defining the name in the function signature like this:
+``` py
+def main(documents: func.DocumentList, events: func.Out[func.Document]):
+```
+
+Define the return of the function like this:
+``` py
+def main(documents: func.DocumentList) -> func.Document:
+```
+And return directly the document that you want to add to the database. 

python-functions/host.json

@@ -1,3 +1,7 @@
 {
-  "version": "2.0"
+  "version": "2.0",
+  "extensionBundle": {
+    "id": "Microsoft.Azure.Functions.ExtensionBundle",
+    "version": "[1.*, 2.0.0)"
+  }
 }

python-functions/serverless.yml

@@ -1,12 +1,12 @@
-service: python-functions-test1
+service: python-functions-test1-len
 frameworkVersion: '2'
 
 provider:
   name: azure
   region: West US 2
   runtime: python3.8 # python3.7 or python3.8 also available
   os: linux  # linux is the only operating system available for python
-  prefix: time-tracker
+  prefix: time-tracker-test-lenin
   environment: # these will be created as application settings
     COSMOS_DATABASE_URI: ${file(keys.yml):COSMOS_DATABASE_URI}
 
@@ -35,7 +35,7 @@ package:
 
 functions:
   handle_activity_events_trigger:
-    handler: src/handlers/handle_activity_events_trigger/__init__.py
+    handler: src/handlers/handle_activity_events_trigger/handle_events_trigger.main
     events:
       - cosmosDB: true
         x-azure-settings:
@@ -46,19 +46,19 @@ functions:
           databaseName: time-tracker-db
           collectionName: activity
           createLeaseCollectionIfNotExists: true
-          leaseCollectionPrefix: activity_
+          leaseCollectionPrefix: activity
       - cosmosDB: true
         x-azure-settings:
           connectionStringSetting: COSMOS_DATABASE_URI
           direction: out
-          name: events # name of input parameter in function signature
+          name: $return # name of input parameter in function signature
           databaseName: time-tracker-db
           collectionName: event
           createIfNotExists: true # A boolean value to indicate whether the collection is created 
           createLeaseCollectionIfNotExists: true
 
   handle_customer_trigger:
-    handler: src/handlers/handle_customer_trigger/__init__.py
+    handler: src/handlers/handle_customer_trigger/handle_events_trigger.main
     events:
       - cosmosDB: true
         x-azure-settings:
@@ -68,11 +68,11 @@ functions:
           databaseName: time-tracker-db
           collectionName: customer
           createLeaseCollectionIfNotExists: true
-          leaseCollectionPrefix: customer_
+          leaseCollectionPrefix: customer
       - cosmosDB: true
         x-azure-settings:
           direction: out
-          name: events # name of input parameter in function signature
+          name: $return # name of input parameter in function signature
           databaseName: time-tracker-db
           collectionName: event
           leaseCollectionName: leases
@@ -81,7 +81,7 @@ functions:
           createIfNotExists: true # A boolean value to indicate whether the collection is created 
 
   handle_project_events_trigger:
-    handler: src/handlers/handle_project_events_trigger/__init__.py
+    handler: src/handlers/handle_project_events_trigger/handle_events_trigger.main
     events:
       - cosmosDB: true
         x-azure-settings:
@@ -92,11 +92,11 @@ functions:
           databaseName: time-tracker-db
           collectionName: project
           createLeaseCollectionIfNotExists: true
-          leaseCollectionPrefix: project_
+          leaseCollectionPrefix: project
       - cosmosDB: true
         x-azure-settings:
           direction: out
-          name: events # name of input parameter in function signature
+          name: $return # name of input parameter in function signature
           databaseName: time-tracker-db
           collectionName: event
           leaseCollectionName: leases
@@ -105,22 +105,23 @@ functions:
           createIfNotExists: true # A boolean value to indicate whether the collection is created
 
   handle_project_type_events_trigger:
-    handler: src/handlers/handle_project_type_events_trigger/__init__.py
+    handler: src/handlers/handle_project_type_events_trigger/handle_events_trigger.main
     events:
       - cosmosDB: true
-        x-azure-settings:
-          name: documents # name of input parameter in function signature
+        x-azure-settings: 
+          name: document # name of input parameter in function signature
           direction: in
           leaseCollectionName: leases
           connectionStringSetting: COSMOS_DATABASE_URI
           databaseName: time-tracker-db
           collectionName: project_type
           createLeaseCollectionIfNotExists: true
-          leaseCollectionPrefix: project_type_
+          leaseCollectionPrefix: project_type
+        
       - cosmosDB: true
         x-azure-settings:
           direction: out
-          name: events # name of input parameter in function signature
+          name: $return # name of input parameter in function signature
           databaseName: time-tracker-db
           collectionName: event
           leaseCollectionName: leases
@@ -129,25 +130,26 @@ functions:
           createIfNotExists: true # A boolean value to indicate whether the collection is created 
 
   handle_time_entry_events_trigger:
-    handler: src/handlers/handle_time_entry_events_trigger/__init__.py
+    handler: src/handlers/handle_time_entry_events_trigger/handle_events_trigger.main
     events:
       - cosmosDB: true
         x-azure-settings:
           name: documents # name of input parameter in function signature
+          databaseName: time-tracker-db
           direction: in
           leaseCollectionName: leases
+          leaseCollectionPrefix: time_entry
           connectionStringSetting: COSMOS_DATABASE_URI
-          databaseName: time-tracker-db
           collectionName: time_entry
           createLeaseCollectionIfNotExists: true
-          leaseCollectionPrefix: time_entry_
+
       - cosmosDB: true
         x-azure-settings:
           direction: out
-          name: events # name of input parameter in function signature
+          name: $return # name of input parameter in function signature
           databaseName: time-tracker-db
           collectionName: event
           leaseCollectionName: leases
           createLeaseCollectionIfNotExists: true
           connectionStringSetting: COSMOS_DATABASE_URI
-          createIfNotExists: true # A boolean value to indicate whether the collection is created 
+          createIfNotExists: true # A boolean value to indicate whether the collection is created 

python-functions/src/handlers/goodbye.py

@@ -5,7 +5,7 @@
 import azure.functions as func
 
 
-def main(documents: func.DocumentList, events: func.Out[func.Document]):
+def main(documents: func.DocumentList) -> func.Document:
     if documents:
         new_events = func.DocumentList()
 
@@ -29,6 +29,7 @@ def main(documents: func.DocumentList, events: func.Out[func.Document]):
                 logging.warning("- Not saved!")
 
         if len(new_events):
-            events.set(new_events)
+            return new_events
+            
         else:
             logging.warning("No valid events were found!")

python-functions/src/handlers/handle_activity_events_trigger/__init__.py

@@ -5,7 +5,7 @@
 import azure.functions as func
 
 
-def main(documents: func.DocumentList, events: func.Out[func.Document]):
+def main(documents: func.DocumentList) -> func.Document:
     if documents:
         new_events = func.DocumentList()
 
@@ -29,6 +29,7 @@ def main(documents: func.DocumentList, events: func.Out[func.Document]):
                 logging.warning("- Not saved!")
 
         if len(new_events):
-            events.set(new_events)
+            return new_events
+            
         else:
             logging.warning("No valid events were found!")