get_distributed_objects: skip unsupported cacheService (#747)

This client does not support cacheService so the iteration in
`get_distributed_objects` will throw an exception if the cluster is also
used by Java+JCache clients (e.g. Spring Boot with Hazelcast as cache
provider).

This fix just skips `hz:impl:cacheService` objects.

Addresses #746

Co-authored-by: Yüce Tekol <[email protected]>

Author: space88man

hazelcast/client.py

@@ -49,6 +49,7 @@
     Ringbuffer,
     Set,
     Topic,
+    _proxy_init,
 )
 from hazelcast.proxy.base import Proxy
 from hazelcast.proxy.map import Map
@@ -67,6 +68,8 @@
 
 _logger = logging.getLogger(__name__)
 
+_SUPPORTED_DDS_NAMES = set(_proxy_init.keys())
+
 
 class HazelcastClient:
     """Hazelcast client instance to access and manipulate distributed data
@@ -495,8 +498,13 @@ def get_distributed_objects(self) -> typing.List[Proxy]:
         }
 
         response = client_get_distributed_objects_codec.decode_response(invocation.future.result())
+
         for dist_obj_info in response:
             local_distributed_object_infos.discard(dist_obj_info)
+
+            # skip unsupported proxies, e.g., hz:impl:cacheService
+            if dist_obj_info.service_name not in _SUPPORTED_DDS_NAMES:
+                continue
             self._proxy_manager.get_or_create(
                 dist_obj_info.service_name, dist_obj_info.name, create_on_remote=False
             )