Python support for activity reset

temporalio/activity.py

@@ -154,6 +154,7 @@ class ActivityCancellationDetails:
     not_found: bool = False
     cancel_requested: bool = False
     paused: bool = False
+    reset: bool = False
     timed_out: bool = False
     worker_shutdown: bool = False
 
@@ -167,6 +168,7 @@ def _from_proto(
             paused=proto.is_paused,
             timed_out=proto.is_timed_out,
             worker_shutdown=proto.is_worker_shutdown,
+            reset=proto.is_reset,
         )
 
 

temporalio/bridge/src/client.rs

@@ -262,6 +262,9 @@ impl ClientRef {
                 "request_cancel_workflow_execution" => {
                     rpc_call!(retry_client, call, request_cancel_workflow_execution)
                 }
+                "reset_activity" => {
+                    rpc_call!(retry_client, call, reset_activity)
+                }
                 "reset_sticky_task_queue" => {
                     rpc_call!(retry_client, call, reset_sticky_task_queue)
                 }

temporalio/client.py

@@ -6363,11 +6363,16 @@ async def heartbeat_async_activity(
                 metadata=input.rpc_metadata,
                 timeout=input.rpc_timeout,
             )
-            if resp_by_id.cancel_requested or resp_by_id.activity_paused:
+            if (
+                resp_by_id.cancel_requested
+                or resp_by_id.activity_paused
+                or resp_by_id.activity_reset
+            ):
                 raise AsyncActivityCancelledError(
                     details=ActivityCancellationDetails(
                         cancel_requested=resp_by_id.cancel_requested,
                         paused=resp_by_id.activity_paused,
+                        reset=resp_by_id.activity_reset,
                     )
                 )
 
@@ -6388,6 +6393,7 @@ async def heartbeat_async_activity(
                     details=ActivityCancellationDetails(
                         cancel_requested=resp.cancel_requested,
                         paused=resp.activity_paused,
+                        reset=resp.activity_reset,
                     )
                 )
 

temporalio/worker/_activity.py

@@ -334,6 +334,24 @@ async def _handle_start_activity_task(
                         ),
                         completion.result.failed.failure,
                     )
+                elif (
+                    isinstance(
+                        err,
+                        (asyncio.CancelledError, temporalio.exceptions.CancelledError),
+                    )
+                    and running_activity.cancellation_details.details
+                    and running_activity.cancellation_details.details.reset
+                ):
+                    temporalio.activity.logger.warning(
+                        "Completing as failure due to unhandled cancel error produced by activity reset",
+                    )
+                    await self._data_converter.encode_failure(
+                        temporalio.exceptions.ApplicationError(
+                            type="ActivityReset",
+                            message="Unhandled activity cancel error produced by activity reset",
+                        ),
+                        completion.result.failed.failure,
+                    )
                 elif (
                     isinstance(
                         err,

temporalio/worker/_workflow_instance.py

@@ -2791,6 +2791,7 @@ def _apply_schedule_command(
                 command.user_metadata.summary.CopyFrom(
                     self._instance._payload_converter.to_payload(self._input.summary)
                 )
+            print("Activity summary: ", command.user_metadata.summary)
             if self._input.priority:
                 command.schedule_activity.priority.CopyFrom(
                     self._input.priority._to_proto()

tests/worker/test_activity.py

@@ -9,12 +9,15 @@
 import threading
 import time
 import uuid
+from concurrent.futures import ThreadPoolExecutor
 from concurrent.futures.process import BrokenProcessPool
 from contextvars import ContextVar
 from dataclasses import dataclass
 from datetime import datetime, timedelta, timezone
+from time import sleep
 from typing import Any, Callable, List, NoReturn, Optional, Sequence, Type
 
+import temporalio.api.workflowservice.v1
 from temporalio import activity, workflow
 from temporalio.client import (
     AsyncActivityHandle,
@@ -1486,3 +1489,105 @@ async def h():
         client, worker, heartbeat, retry_max_attempts=2
     )
     assert result.result == "details: Some detail"
+
+
+async def test_activity_reset_catch(
+    client: Client, worker: ExternalWorker, env: WorkflowEnvironment
+):
+    if env.supports_time_skipping:
+        pytest.skip("Time skipping server doesn't support activity reset")
+
+    @activity.defn
+    async def wait_cancel() -> str:
+        req = temporalio.api.workflowservice.v1.ResetActivityRequest(
+            namespace=client.namespace,
+            execution=temporalio.api.common.v1.WorkflowExecution(
+                workflow_id=activity.info().workflow_id,
+                run_id=activity.info().workflow_run_id,
+            ),
+            id=activity.info().activity_id,
+        )
+        await client.workflow_service.reset_activity(req)
+        try:
+            while True:
+                await asyncio.sleep(0.3)
+                activity.heartbeat()
+        except asyncio.CancelledError:
+            details = activity.cancellation_details()
+            assert details is not None
+            return "Got cancelled error, reset? " + str(details.reset)
+
+    @activity.defn
+    def sync_wait_cancel() -> str:
+        req = temporalio.api.workflowservice.v1.ResetActivityRequest(
+            namespace=client.namespace,
+            execution=temporalio.api.common.v1.WorkflowExecution(
+                workflow_id=activity.info().workflow_id,
+                run_id=activity.info().workflow_run_id,
+            ),
+            id=activity.info().activity_id,
+        )
+        asyncio.run(client.workflow_service.reset_activity(req))
+        try:
+            while True:
+                sleep(0.3)
+                activity.heartbeat()
+        except temporalio.exceptions.CancelledError:
+            details = activity.cancellation_details()
+            assert details is not None
+            return "Got cancelled error, reset? " + str(details.reset)
+        except Exception as e:
+            return str(type(e)) + str(e)
+
+    result = await _execute_workflow_with_activity(
+        client,
+        worker,
+        wait_cancel,
+    )
+    assert result.result == "Got cancelled error, reset? True"
+
+    config = WorkerConfig(
+        activity_executor=ThreadPoolExecutor(max_workers=1),
+    )
+    result = await _execute_workflow_with_activity(
+        client,
+        worker,
+        sync_wait_cancel,
+        worker_config=config,
+    )
+    assert result.result == "Got cancelled error, reset? True"
+
+
+async def test_activity_reset_history(
+    client: Client, worker: ExternalWorker, env: WorkflowEnvironment
+):
+    if env.supports_time_skipping:
+        pytest.skip("Time skipping server doesn't support activity reset")
+
+    @activity.defn
+    async def wait_cancel() -> str:
+        req = temporalio.api.workflowservice.v1.ResetActivityRequest(
+            namespace=client.namespace,
+            execution=temporalio.api.common.v1.WorkflowExecution(
+                workflow_id=activity.info().workflow_id,
+                run_id=activity.info().workflow_run_id,
+            ),
+            id=activity.info().activity_id,
+        )
+        await client.workflow_service.reset_activity(req)
+        while True:
+            await asyncio.sleep(0.3)
+            activity.heartbeat()
+
+    with pytest.raises(WorkflowFailureError) as e:
+        result = await _execute_workflow_with_activity(
+            client,
+            worker,
+            wait_cancel,
+        )
+    assert isinstance(e.value.cause, ActivityError)
+    assert isinstance(e.value.cause.cause, ApplicationError)
+    assert (
+        e.value.cause.cause.message
+        == "Unhandled activity cancel error produced by activity reset"
+    )

tests/worker/test_workflow.py

@@ -814,7 +814,10 @@ class SimpleActivityWorkflow:
     @workflow.run
     async def run(self, name: str) -> str:
         return await workflow.execute_activity(
-            say_hello, name, schedule_to_close_timeout=timedelta(seconds=5)
+            say_hello,
+            name,
+            schedule_to_close_timeout=timedelta(seconds=5),
+            summary="Do a thing",
         )