Add headers to institution update message.

import_api_app/resources/UpdateInstitution.py

+import uuid
+
 from flask_restful import Resource, current_app
 from kafka import KafkaProducer
 import requests
@@ -8,6 +10,11 @@ from requests.auth import HTTPBasicAuth
 
 class UpdateInstitution(Resource):
 
+    def __init__(self):
+        self.producer = KafkaProducer(bootstrap_servers=current_app.config['kafka-broker-url'],
+                                      value_serializer=lambda m: json.dumps(m, ensure_ascii=False)
+                                      .encode('utf-8'))
+
     def get(self, institution_drupal_uuid):
         """
         Update the institution with the given drupal UUID in the backend.
@@ -36,7 +43,7 @@ class UpdateInstitution(Resource):
                   example: the value written into the topic
 
         """
-        topic_value = ''
+        result = ''
         headers = {'X-API-Key': current_app.config['drupal-api-key']}
         user = current_app.config['drupal-user']
         password = current_app.config['drupal-password']
@@ -97,7 +104,7 @@ class UpdateInstitution(Resource):
             return {
                        'status': 'FAILURE',
                        'message': str(ex),
-                       'topic_value': topic_value
+                       'topic_value': result
                    }, 500
         except Exception as ex:
             msg = f'Unknown Exception ({institution_drupal_uuid}): {ex}\n{traceback.format_exc()}'
@@ -105,9 +112,9 @@ class UpdateInstitution(Resource):
             return {
                        'status': 'FAILURE',
                        'message': str(ex),
-                       'topic_value': topic_value
+                       'topic_value': result
                    }, 500
-        topic_value = {
+        result = {
             'type': institution_data_de['type'],
             'status': institution_data_de['attributes']['status'],
             'title_de': institution_data_de['attributes']['title'],
@@ -132,29 +139,31 @@ class UpdateInstitution(Resource):
                 institution_data_de['attributes']['computed_teaser_image_url'],
             'computed_teaser_color': institution_data_de['attributes']['computed_teaser_color'],
         }
-
-        # 2. write info into kafka topic
+        producer_topic = current_app.config['topic-drupal-export']
+        headers = [
+            ('recordSetId', bytes('none', encoding='utf-8')),
+            ('sessionId', bytes(str(uuid.uuid4()), encoding='utf-8')),
+            ('institutionId', bytes(result.get('field_memobase_id'), encoding='utf-8')),
+            ('isPublished', bytes(str(result['status']), encoding='utf-8'))
+        ]
         try:
-            producer = KafkaProducer(bootstrap_servers=current_app.config['kafka-broker-url'],
-                                     value_serializer=lambda m: json.dumps(m, ensure_ascii=False)
-                                     .encode('utf-8'))
-            key = bytes(topic_value.get('field_memobase_id'), encoding='utf-8')
-            producer.send(current_app.config['topic-drupal-export'], topic_value, key)
+            key = bytes(result.get('field_memobase_id'), encoding='utf-8')
+            self.producer.send(producer_topic, result, key, headers=headers)
         except Exception as ex:
-            msg = 'Exception for ' + institution_drupal_uuid + ': ' + str(ex) + '\n' + \
-                  traceback.format_exc()
-            current_app.logger.error(msg)
+            msg = f'Unknown Exception ({institution_drupal_uuid}): {ex}. '\
+                  f'Check logs for more details.'
+            current_app.logger.error(f'{msg}\n{traceback.format_exc()}')
             return {
                        'status': 'FAILURE',
-                       'topic_key': topic_value.get('field_memobase_id'),
-                       'topic_value': topic_value
+                       'topic_key': result.get('field_memobase_id'),
+                       'topic_value': result
                    }, 500
 
         current_app.logger.debug('success for ' + institution_drupal_uuid)
         return {
                    'status': 'SUCCESS',
-                   'topic_key': topic_value.get('field_memobase_id'),
-                   'topic_value': topic_value
+                   'topic_key': result.get('field_memobase_id'),
+                   'topic_value': result
                }, 200
 
     @staticmethod