fixup! Issue #28 initial implementation of parallel requests (on `/jo…

…bs`)

src/openeo_aggregator/connection.py

@@ -277,9 +277,6 @@ def get_connections(self) -> List[BackendConnection]:
 
         return self._connections_cache.connections
 
-    def __len__(self) -> int:
-        return len(self._backend_urls)
-
     def __iter__(self) -> Iterator[BackendConnection]:
         return iter(self.get_connections())
 
@@ -386,15 +383,16 @@ def do_request(
             else:
                 return resp.content
 
-        max_workers = min(max_workers, len(self))
+        connections: List[BackendConnection] = self.get_connections()
+        max_workers = min(max_workers, len(connections))
 
         with TimingLogger(
-            title=f"request_parallel {method} {path} on {len(self)} backends with thread pool {max_workers=}",
+            title=f"request_parallel {method} {path} on {len(connections)} backends with thread pool {max_workers=}",
             logger=_log,
         ), concurrent.futures.ThreadPoolExecutor(max_workers=max_workers) as executor:
             # Submit all futures (one for each backend connection)
             futures: List[Tuple[BackendId, concurrent.futures.Future]] = []
-            for con in self.get_connections():
+            for con in connections:
                 if authenticated_from_request:
                     auth = BearerAuth(bearer=con.extract_bearer(request=authenticated_from_request))
                 else: