diff --git a/src/omnipy/api/protocols/private/util.py b/src/omnipy/api/protocols/private/util.py
index 050d39d2..ef31f33b 100644
--- a/src/omnipy/api/protocols/private/util.py
+++ b/src/omnipy/api/protocols/private/util.py
@@ -12,6 +12,17 @@
 _HasContentsT = TypeVar('_HasContentsT', bound='HasContents')
 
 
+class IsDataPublisher(Protocol):
+    def subscribe_attr(self, attr_name: str, callback_fun: Callable[..., None]):
+        ...
+
+    def subscribe(self, callback_fun: Callable[..., None], do_callback: bool = True) -> None:
+        ...
+
+    def unsubscribe_all(self) -> None:
+        ...
+
+
 @runtime_checkable
 class IsCallableParamAfterSelf(Protocol):
     """"""
diff --git a/src/omnipy/api/protocols/public/config.py b/src/omnipy/api/protocols/public/config.py
index fcb50b7b..a0168bee 100644
--- a/src/omnipy/api/protocols/public/config.py
+++ b/src/omnipy/api/protocols/public/config.py
@@ -5,10 +5,11 @@
                               ConfigOutputStorageProtocolOptions,
                               ConfigPersistOutputsOptions,
                               ConfigRestoreOutputsOptions)
+from omnipy.api.protocols.private.util import IsDataPublisher
 from omnipy.api.typedefs import LocaleType
 
 
-class IsEngineConfig(Protocol):
+class IsEngineConfig(IsDataPublisher, Protocol):
     """"""
     ...
 
@@ -23,12 +24,12 @@ class IsPrefectEngineConfig(IsEngineConfig, Protocol):
     use_cached_results: bool = False
 
 
-class IsJobConfig(Protocol):
+class IsJobConfig(IsDataPublisher, Protocol):
     """"""
     output_storage: 'IsOutputStorageConfig'
 
 
-class IsDataConfig(Protocol):
+class IsDataConfig(IsDataPublisher, Protocol):
     """"""
     interactive_mode: bool
     dynamically_convert_elements_to_models: bool
@@ -38,7 +39,7 @@ class IsDataConfig(Protocol):
     http_config_for_host: defaultdict[str, 'IsHttpConfig']
 
 
-class IsHttpConfig(Protocol):
+class IsHttpConfig(IsDataPublisher, Protocol):
     """"""
     requests_per_time_period: float
     time_period_in_secs: float
@@ -47,7 +48,7 @@ class IsHttpConfig(Protocol):
     retry_backoff_strategy: BackoffStrategy
 
 
-class IsRootLogConfig(Protocol):
+class IsRootLogConfig(IsDataPublisher, Protocol):
     """"""
     log_format_str: str
     locale: LocaleType
@@ -62,7 +63,7 @@ class IsRootLogConfig(Protocol):
     file_log_path: str
 
 
-class IsOutputStorageConfigBase(Protocol):
+class IsOutputStorageConfigBase(IsDataPublisher, Protocol):
     persist_data_dir_path: str
 
 
@@ -77,7 +78,7 @@ class IsS3OutputStorageConfig(IsOutputStorageConfigBase, Protocol):
     bucket_name: str
 
 
-class IsOutputStorageConfig(Protocol):
+class IsOutputStorageConfig(IsDataPublisher, Protocol):
     persist_outputs: ConfigPersistOutputsOptions
     restore_outputs: ConfigRestoreOutputsOptions
     protocol: ConfigOutputStorageProtocolOptions
diff --git a/src/omnipy/api/protocols/public/hub.py b/src/omnipy/api/protocols/public/hub.py
index 182056ef..df3cb427 100644
--- a/src/omnipy/api/protocols/public/hub.py
+++ b/src/omnipy/api/protocols/public/hub.py
@@ -7,6 +7,7 @@
 from omnipy.api.protocols.private.data import IsDataClassCreator
 from omnipy.api.protocols.private.engine import IsEngine
 from omnipy.api.protocols.private.log import IsRunStateRegistry
+from omnipy.api.protocols.private.util import IsDataPublisher
 from omnipy.api.protocols.public.config import (IsDataConfig,
                                                 IsJobConfig,
                                                 IsLocalRunnerConfig,
@@ -30,7 +31,7 @@ def config(self) -> IsRootLogConfig:
         ...
 
 
-class IsRuntimeConfig(Protocol):
+class IsRuntimeConfig(IsDataPublisher, Protocol):
     """"""
     job: IsJobConfig
     data: IsDataConfig
@@ -52,7 +53,7 @@ def reset_to_defaults(self) -> None:
         ...
 
 
-class IsRuntimeObjects(Protocol):
+class IsRuntimeObjects(IsDataPublisher, Protocol):
     """"""
 
     job_creator: IsJobConfigHolder
diff --git a/src/omnipy/config/data.py b/src/omnipy/config/data.py
index 7cbd6f84..f4254ae8 100644
--- a/src/omnipy/config/data.py
+++ b/src/omnipy/config/data.py
@@ -5,12 +5,13 @@
 
 from omnipy.api.enums import BackoffStrategy
 from omnipy.api.protocols.public.config import IsHttpConfig
+from omnipy.util.publisher import DataPublisher
 
 _terminal_size = shutil.get_terminal_size()
 
 
 @dataclass
-class HttpConfig:
+class HttpConfig(DataPublisher):
     # For RateLimitingClientSession helper class
     requests_per_time_period: float = 60
     time_period_in_secs: float = 60
@@ -22,7 +23,7 @@ class HttpConfig:
 
 
 @dataclass
-class DataConfig:
+class DataConfig(DataPublisher):
     interactive_mode: bool = True
     dynamically_convert_elements_to_models: bool = False
     terminal_size_columns: int = _terminal_size.columns
diff --git a/src/omnipy/config/engine.py b/src/omnipy/config/engine.py
index 38092d6f..a3820fd3 100644
--- a/src/omnipy/config/engine.py
+++ b/src/omnipy/config/engine.py
@@ -1,8 +1,10 @@
 from dataclasses import dataclass
 
+from omnipy.util.publisher import DataPublisher
+
 
 @dataclass
-class EngineConfig:
+class EngineConfig(DataPublisher):
     ...
 
 
diff --git a/src/omnipy/config/job.py b/src/omnipy/config/job.py
index 0d6da7bb..6bf39024 100644
--- a/src/omnipy/config/job.py
+++ b/src/omnipy/config/job.py
@@ -8,6 +8,7 @@
 from omnipy.api.protocols.public.config import (IsLocalOutputStorageConfig,
                                                 IsOutputStorageConfig,
                                                 IsS3OutputStorageConfig)
+from omnipy.util.publisher import DataPublisher
 
 
 def _get_persist_data_dir_path() -> str:
@@ -15,12 +16,12 @@ def _get_persist_data_dir_path() -> str:
 
 
 @dataclass
-class LocalOutputStorageConfig:
+class LocalOutputStorageConfig(DataPublisher):
     persist_data_dir_path: str = field(default_factory=_get_persist_data_dir_path)
 
 
 @dataclass
-class S3OutputStorageConfig:
+class S3OutputStorageConfig(DataPublisher):
     persist_data_dir_path: str = os.path.join('omnipy', 'outputs')
     endpoint_url: str = ''
     bucket_name: str = ''
@@ -29,7 +30,7 @@ class S3OutputStorageConfig:
 
 
 @dataclass
-class OutputStorageConfig:
+class OutputStorageConfig(DataPublisher):
     persist_outputs: ConfigPersistOutputsOptions = \
         ConfigPersistOutputsOptions.ENABLE_FLOW_AND_TASK_OUTPUTS
     restore_outputs: ConfigRestoreOutputsOptions = \
@@ -40,5 +41,5 @@ class OutputStorageConfig:
 
 
 @dataclass
-class JobConfig:
+class JobConfig(DataPublisher):
     output_storage: IsOutputStorageConfig = field(default_factory=OutputStorageConfig)
diff --git a/src/omnipy/config/root_log.py b/src/omnipy/config/root_log.py
index 6e61baaf..636d00a6 100644
--- a/src/omnipy/config/root_log.py
+++ b/src/omnipy/config/root_log.py
@@ -6,6 +6,7 @@
 from typing import TextIO
 
 from omnipy.api.typedefs import LocaleType
+from omnipy.util.publisher import DataPublisher
 
 
 def _get_log_path() -> str:
@@ -13,7 +14,7 @@ def _get_log_path() -> str:
 
 
 @dataclass
-class RootLogConfig:
+class RootLogConfig(DataPublisher):
     log_format_str: str = '[{engine}] {asctime} - {levelname}: {message} ({name})'
     locale: LocaleType = pkg_locale.getlocale()
     log_to_stdout: bool = True
diff --git a/src/omnipy/engine/local.py b/src/omnipy/engine/local.py
index 66606f7c..274e409a 100644
--- a/src/omnipy/engine/local.py
+++ b/src/omnipy/engine/local.py
@@ -1,4 +1,3 @@
-from dataclasses import dataclass
 from typing import Any, Callable, Type
 
 from omnipy.api.protocols.public.compute import IsDagFlow, IsFuncFlow, IsLinearFlow, IsTask
@@ -8,12 +7,6 @@
                                       FuncFlowRunnerEngine,
                                       LinearFlowRunnerEngine,
                                       TaskRunnerEngine)
-from omnipy.util.publisher import RuntimeEntryPublisher
-
-
-@dataclass
-class LocalRunnerConfigEntryPublisher(LocalRunnerConfig, RuntimeEntryPublisher):
-    ...
 
 
 class LocalRunner(TaskRunnerEngine,
@@ -29,7 +22,7 @@ def _update_from_config(self) -> None:
 
     @classmethod
     def get_config_cls(cls) -> Type[IsLocalRunnerConfig]:
-        return LocalRunnerConfigEntryPublisher
+        return LocalRunnerConfig
 
     def _init_task(self, task: IsTask, call_func: Callable) -> Any:
         ...
diff --git a/src/omnipy/hub/log/root_log.py b/src/omnipy/hub/log/root_log.py
index cb1b2fd0..7deb8bc1 100644
--- a/src/omnipy/hub/log/root_log.py
+++ b/src/omnipy/hub/log/root_log.py
@@ -8,18 +8,11 @@
 from omnipy.config.root_log import RootLogConfig
 from omnipy.hub.log.handlers import DailyRotatingFileHandler
 from omnipy.util.helpers import get_datetime_format
-from omnipy.util.publisher import RuntimeEntryPublisher
-
-
-@dataclass
-class RootLogConfigEntryPublisher(RootLogConfig, RuntimeEntryPublisher):
-    ...
 
 
 @dataclass
 class RootLogObjects:
-    _config: IsRootLogConfig = field(
-        init=False, repr=False, default_factory=RootLogConfigEntryPublisher)
+    _config: IsRootLogConfig = field(init=False, repr=False, default_factory=RootLogConfig)
 
     formatter: logging.Formatter | None = None
     stdout_handler: StreamHandler | None = None
diff --git a/src/omnipy/hub/runtime.py b/src/omnipy/hub/runtime.py
index 03ff2f83..f4ae8a85 100644
--- a/src/omnipy/hub/runtime.py
+++ b/src/omnipy/hub/runtime.py
@@ -16,13 +16,15 @@
 from omnipy.api.protocols.public.hub import IsRootLogObjects, IsRuntimeConfig, IsRuntimeObjects
 from omnipy.compute.job import JobBase
 from omnipy.config.data import DataConfig
+from omnipy.config.engine import LocalRunnerConfig, PrefectEngineConfig
 from omnipy.config.job import JobConfig
+from omnipy.config.root_log import RootLogConfig
 from omnipy.data.data_class_creator import DataClassBase
 from omnipy.data.serializer import SerializerRegistry
-from omnipy.engine.local import LocalRunner, LocalRunnerConfigEntryPublisher
-from omnipy.hub.log.root_log import RootLogConfigEntryPublisher, RootLogObjects
+from omnipy.engine.local import LocalRunner
+from omnipy.hub.log.root_log import RootLogObjects
 from omnipy.hub.registry import RunStateRegistry
-from omnipy.modules.prefect.engine.prefect import PrefectEngine, PrefectEngineConfigEntryPublisher
+from omnipy.modules.prefect.engine.prefect import PrefectEngine
 from omnipy.util.helpers import called_from_omnipy_tests
 from omnipy.util.publisher import DataPublisher, RuntimeEntryPublisher
 
@@ -44,9 +46,9 @@ class RuntimeConfig(RuntimeEntryPublisher):
     job: IsJobConfig = field(default_factory=JobConfig)
     data: IsDataConfig = field(default_factory=_data_config_factory)
     engine: EngineChoice = EngineChoice.LOCAL
-    local: IsLocalRunnerConfig = field(default_factory=LocalRunnerConfigEntryPublisher)
-    prefect: IsPrefectEngineConfig = field(default_factory=PrefectEngineConfigEntryPublisher)
-    root_log: IsRootLogConfig = field(default_factory=RootLogConfigEntryPublisher)
+    local: IsLocalRunnerConfig = field(default_factory=LocalRunnerConfig)
+    prefect: IsPrefectEngineConfig = field(default_factory=PrefectEngineConfig)
+    root_log: IsRootLogConfig = field(default_factory=RootLogConfig)
 
     def reset_to_defaults(self) -> None:
         prev_back = self._back
@@ -55,9 +57,9 @@ def reset_to_defaults(self) -> None:
         self.job = JobConfig()
         self.data = DataConfig()
         self.engine = EngineChoice.LOCAL
-        self.local = LocalRunnerConfigEntryPublisher()
-        self.prefect = PrefectEngineConfigEntryPublisher()
-        self.root_log = RootLogConfigEntryPublisher()
+        self.local = LocalRunnerConfig()
+        self.prefect = PrefectEngineConfig()
+        self.root_log = RootLogConfig()
 
         self._back = prev_back
         if self._back is not None:
diff --git a/src/omnipy/modules/prefect/engine/prefect.py b/src/omnipy/modules/prefect/engine/prefect.py
index 4dbc716b..657756ef 100644
--- a/src/omnipy/modules/prefect/engine/prefect.py
+++ b/src/omnipy/modules/prefect/engine/prefect.py
@@ -1,4 +1,3 @@
-from dataclasses import dataclass
 from datetime import timedelta
 from typing import Any, Callable, Type
 
@@ -10,16 +9,10 @@
                                       LinearFlowRunnerEngine,
                                       TaskRunnerEngine)
 from omnipy.util.helpers import resolve
-from omnipy.util.publisher import RuntimeEntryPublisher
 
 from .. import prefect_flow, prefect_task, PrefectFlow, PrefectTask, task_input_hash
 
 
-@dataclass
-class PrefectEngineConfigEntryPublisher(PrefectEngineConfig, RuntimeEntryPublisher):
-    ...
-
-
 class PrefectEngine(TaskRunnerEngine,
                     LinearFlowRunnerEngine,
                     DagFlowRunnerEngine,
@@ -33,12 +26,12 @@ def _update_from_config(self) -> None:
 
     @classmethod
     def get_config_cls(cls) -> Type[IsPrefectEngineConfig]:
-        return PrefectEngineConfigEntryPublisher
+        return PrefectEngineConfig
 
     # TaskRunnerEngine
 
     def _init_task(self, task: IsTask, call_func: Callable) -> PrefectTask:
-        assert isinstance(self._config, PrefectEngineConfigEntryPublisher)
+        assert isinstance(self._config, PrefectEngineConfig)
         task_kwargs = dict(
             name=task.name,
             cache_key_fn=task_input_hash if self._config.use_cached_results else None,
diff --git a/tests/hub/runtime/test_runtime.py b/tests/hub/runtime/test_runtime.py
index 6032fef4..e848e787 100644
--- a/tests/hub/runtime/test_runtime.py
+++ b/tests/hub/runtime/test_runtime.py
@@ -18,13 +18,14 @@
 from omnipy.config.data import DataConfig
 from omnipy.config.engine import LocalRunnerConfig, PrefectEngineConfig
 from omnipy.config.job import JobConfig
+from omnipy.config.root_log import RootLogConfig
 from omnipy.data.data_class_creator import DataClassBase, DataClassCreator
 from omnipy.data.serializer import SerializerRegistry
-from omnipy.engine.local import LocalRunner, LocalRunnerConfigEntryPublisher
-from omnipy.hub.log.root_log import RootLogConfigEntryPublisher, RootLogObjects
+from omnipy.engine.local import LocalRunner
+from omnipy.hub.log.root_log import RootLogObjects
 from omnipy.hub.registry import RunStateRegistry
 from omnipy.hub.runtime import RuntimeConfig, RuntimeObjects
-from omnipy.modules.prefect.engine.prefect import PrefectEngine, PrefectEngineConfigEntryPublisher
+from omnipy.modules.prefect.engine.prefect import PrefectEngine
 
 from .helpers.mocks import (MockLocalRunner,
                             MockLocalRunnerConfig,
@@ -162,21 +163,21 @@ def test_init_runtime_config_after_job_creator(
         ),
         (
             ('config', 'local'),
-            LocalRunnerConfigEntryPublisher,
+            LocalRunnerConfig,
             ('objects', 'local'),
             LocalRunner,
             'config',
         ),
         (
             ('config', 'prefect'),
-            PrefectEngineConfigEntryPublisher,
+            PrefectEngineConfig,
             ('objects', 'prefect'),
             PrefectEngine,
             'config',
         ),
         (
             ('config', 'root_log'),
-            RootLogConfigEntryPublisher,
+            RootLogConfig,
             ('objects', 'root_log'),
             RootLogObjects,
             'config',
@@ -298,16 +299,8 @@ def test_job_creator_subscribes_to_selected_engine(
 @pc.parametrize(
     'engine_name, engine_cls, config_cls, mock_engine_cls, mock_config_class',
     [
-        ('local',
-         LocalRunner,
-         LocalRunnerConfigEntryPublisher,
-         MockLocalRunner,
-         MockLocalRunnerConfig),
-        ('prefect',
-         PrefectEngine,
-         PrefectEngineConfigEntryPublisher,
-         MockPrefectEngine,
-         MockPrefectEngineConfig),
+        ('local', LocalRunner, LocalRunnerConfig, MockLocalRunner, MockLocalRunnerConfig),
+        ('prefect', PrefectEngine, PrefectEngineConfig, MockPrefectEngine, MockPrefectEngineConfig),
     ],
     ids=['local', 'prefect'])
 def test_new_engine_object_updates_engine_config_if_needed(