traceRetrieval: cleanup

src/transaction-hub-in/trace-retrieval-microservice/app/configs/swagger_local.yml

@@ -23,7 +23,7 @@ paths:
       responses:
         '200':
           description: "Successful Request"
-  /transactions-failed/use_case/{use_case}:
+  /use_cases/{use_case}/transactions-failed:
     delete:
       operationId: "routes.transactions.delete_all_failed_for_use_case"
       tags:
@@ -52,7 +52,7 @@ paths:
       responses:
         '200':
           description: "Successful Request"
-  /transactions/use_case/{use_case}:
+  /use_cases/{use_case}/transactions:
     get:
       operationId: "routes.transactions.all_for_use_case"
       tags:
@@ -83,66 +83,4 @@ paths:
             type: object
       responses:
         '200':
-          description: "Successful echo of request data"
-
-  /trace:
-    post:
-        operationId: "routes.blockchain_trace.post"
-        tags:
-          - "Blockchain Trace"
-        summary: "Add a new blockchain trace to SMART"
-        description: "Receives a new blockchain trace to store in SMART."
-        parameters:
-          - in: body 
-            name: "BlockchainTrace"
-            description: "The trace to be added"
-            required: true
-            schema:
-              $ref: "#/definitions/BlockchainTrace"
-        responses:
-          '201':
-            description: "Successful operation"
-          '400':
-            description: "Invalid input"
-    get:
-        operationId: "routes.blockchain_trace.get"
-        tags:
-          - "Blockchain Trace"
-        summary: "Get blockchain traces"
-        description: "Returns all blockchain traces in the database"
-        parameters: []
-        responses:
-          '200':
-            description: "Successful operation"
-            schema:
-              $ref: "#/definitions/BlockchainTrace"
-              
-definitions:
-  BlockchainTrace:
-    type: "object"
-    properties:
-      TransactionId:
-        type: string
-        format: uuid
-      Timestamp:
-        type: "string"
-        format: "date-time"
-      ApplicationType:
-        type: "string"
-      TransactionFrom:
-        type: "string"
-        format: "uuid"
-      TransactionTo:
-        type: "string"
-        format: "uuid"
-      TransferredAsset:
-        type: "string"
-      ResourceIds:
-        type: "string"
-      ResourceMd5:
-        type: "string"
-      ResourceState:
-        type: "string"
-      Metadata:
-        type: "string"
-    
\ No newline at end of file
+          description: "Successful echo of request data"
\ No newline at end of file

src/transaction-hub-in/trace-retrieval-microservice/app/database/MongoRepository.py

-import pymongo
-import network_constants as netconst
-from database.MongoRepositoryBase import MongoRepositoryBase
-
-class MongoRepository(MongoRepositoryBase):
-
-    def __init__(self):
-        super().__init__(netconst.TRACE_RETRIEVAL_DB_HOSTNAME, 
-            netconst.TRACE_RETRIEVAL_DB_PORT, 'traceRetrievalDB')
-        self._collection_name = 'traces'
-
-    def insert_trace(self, content: dict):
-        super().insert_entry(self._collection_name, content)
-
-    def get_traces(self, selection: dict = {}, projection: dict = {'_': 0}) -> pymongo.cursor.Cursor:
-        return super().get_entries(self._collection_name, selection, projection)
-

src/transaction-hub-in/trace-retrieval-microservice/app/messaging/MessageHandler.py

@@ -85,9 +85,12 @@ class MessageHandler:
 
     def _flatten_transaction(self, transaction: Dict, mappings: Dict):
         '''
-        takes the (possibly nested) dictionary and resolves the given paths
-        returns a map which is no longer nested with the keys of the 
-        mappings parameter
+        Resolves all paths in [mappings] with the data from [transaction] and creates
+        a non-nested flattened element.
+
+        @params
+        transaction - Required: dictionary, that is arbitrarily deep nested
+        mappings    - Required: contains string->path mappings, describing how the flattened object is built
         '''
         flattened = {}
 
@@ -115,13 +118,17 @@ class MessageHandler:
         return flattened
 
     def _fetch_schema_information(self, use_case: str) -> Dict:
+        '''
+        Fetches the schema of the use-case from the business-logic microservice per REST.
+
+        @params
+        use_case - Required: string identifier for the use-case
+        '''
         jwt_token = TokenManager.getInstance().getToken()
         
         # query schema information
         url = f'https://{network_constants.BUSINESS_LOGIC_HOSTNAME}:{network_constants.BUSINESS_LOGIC_REST_PORT}/api/use-cases/{use_case}/schema'
 
-        print(f"CALLING: {url}")
-
         response = requests.get(
                 url,
                 verify = False, 
@@ -129,27 +136,31 @@ class MessageHandler:
                 headers = { "Authorization": f"Bearer {jwt_token}"}
         )
 
-        print(f"RESPONSE: {response.text}")
-
         if response.status_code != 200:
             raise ValueError("no schema information available")
         
         return json.loads(response.text)
 
-    def handle_blockchain_transaction(self, transaction: Dict):
-        transaction_data = transaction
+    def handle_blockchain_transaction(self, transaction_message: Dict):
+        '''
+        Proccesses a blockchain transaction. The schema gets fetched from the business-logic microservice and a flattened
+        version then is created out of it.
+
+        @params
+        transaction_message - Required: data of the transaction. Has to contain the key 'ApplicationType' which stores the use-case.
+        '''
 
-        use_case = transaction_data["ApplicationType"]
+        use_case = transaction_message["ApplicationType"]
 
         try:
             data = self._fetch_schema_information(use_case)
         except ValueError as e:
             print(f"{e}")
-            MessageHandler._repository.add_failed_transaction(transaction)
+            MessageHandler._repository.add_failed_transaction(transaction_message)
             return
 
         mappings = data["mappings"]
-        flattened = self._flatten_transaction(transaction_data, mappings)
+        flattened = self._flatten_transaction(transaction_message, mappings)
 
         transaction = Transaction(use_case, flattened)
         MessageHandler._repository.add_transaction(transaction)
@@ -160,8 +171,6 @@ class MessageHandler:
         }
 
         msg_string = json.dumps(msg)
-
-        print("OUT: "+msg_string)
         
         # inform semantic linking microservice
         self._message_sender.send_message('datahub', 'semantic-linking', msg_string)
\ No newline at end of file

src/transaction-hub-in/trace-retrieval-microservice/app/routes/blockchain_trace.py

-from flask import request, Response
-from database.MongoRepository import MongoRepository
-
-mongo_repo = MongoRepository()
-
-def post():
-    return Response(response='Use the RESTful Gateway instead', status=405)
-
-def get():
-    return list(mongo_repo.get_traces(projection={'_id': 0}))
\ No newline at end of file