feat: Add get_progress and set_progress to redis result backend

Uses as standard suffix on the redis key (hardcoded as "__progress") to store progress results

Author: sminnee

taskiq_redis/redis_backend.py

@@ -19,6 +19,7 @@
 from taskiq.abc.result_backend import TaskiqResult
 from taskiq.abc.serializer import TaskiqSerializer
 from taskiq.compat import model_dump, model_validate
+from taskiq.depends.progress_tracker import TaskProgress
 from taskiq.serializers import PickleSerializer
 
 from taskiq_redis.exceptions import (
@@ -41,6 +42,8 @@
 
 _ReturnType = TypeVar("_ReturnType")
 
+PROGRESS_KEY_SUFFIX = "__progress"
+
 
 class RedisAsyncResultBackend(AsyncResultBackend[_ReturnType]):
     """Async result based on redis."""
@@ -174,6 +177,52 @@ async def get_result(
 
         return taskiq_result
 
+    async def set_progress(
+        self,
+        task_id: str,
+        progress: TaskProgress[_ReturnType],
+    ) -> None:
+        """
+        Sets task progress in redis.
+
+        Dumps TaskProgress instance into the bytes and writes
+        it to redis with a standard suffix on the task_id as the key
+
+        :param task_id: ID of the task.
+        :param result: task's TaskProgress instance.
+        """
+        redis_set_params: Dict[str, Union[str, int, bytes]] = {
+            "name": task_id + PROGRESS_KEY_SUFFIX,
+            "value": self.serializer.dumpb(model_dump(progress)),
+        }
+        if self.result_ex_time:
+            redis_set_params["ex"] = self.result_ex_time
+        elif self.result_px_time:
+            redis_set_params["px"] = self.result_px_time
+
+        async with Redis(connection_pool=self.redis_pool) as redis:
+            await redis.set(**redis_set_params)  # type: ignore
+
+    async def get_progress(self, task_id: str) -> TaskProgress[_ReturnType] | None:
+        """
+        Gets progress results from the task.
+
+        :param task_id: task's id.
+        :return: task's TaskProgress instance.
+        """
+        async with Redis(connection_pool=self.redis_pool) as redis:
+            result_value = await redis.get(
+                name=task_id + PROGRESS_KEY_SUFFIX,
+            )
+
+        if result_value is None:
+            return None
+
+        return model_validate(
+            TaskProgress[_ReturnType],
+            self.serializer.loadb(result_value),
+        )
+
 
 class RedisAsyncClusterResultBackend(AsyncResultBackend[_ReturnType]):
     """Async result backend based on redis cluster."""

tests/test_result_backend.py

@@ -4,6 +4,7 @@
 
 import pytest
 from taskiq import TaskiqResult
+from taskiq.depends.progress_tracker import TaskProgress, TaskState
 
 from taskiq_redis import (
     RedisAsyncClusterResultBackend,
@@ -438,3 +439,80 @@ async def test_keep_results_after_reading_sentinel(
     res2 = await result_backend.get_result(task_id=task_id)
     assert res1 == res2
     await result_backend.shutdown()
+
+
+@pytest.mark.anyio
+async def test_set_progress(redis_url: str) -> None:
+    """
+    Test that set_progress/get_progress works.
+
+    :param redis_url: redis URL.
+    """
+    result_backend = RedisAsyncResultBackend(  # type: ignore
+        redis_url=redis_url,
+    )
+    task_id = uuid.uuid4().hex
+
+    test_progress_1 = TaskProgress(
+        state=TaskState.STARTED,
+        meta={"message": "quarter way", "pct": 25},
+    )
+    test_progress_2 = TaskProgress(
+        state=TaskState.STARTED,
+        meta={"message": "half way", "pct": 50},
+    )
+
+    # Progress starts as None
+    assert await result_backend.get_progress(task_id=task_id) is None
+
+    # Setting the first time persists
+    await result_backend.set_progress(task_id=task_id, progress=test_progress_1)
+
+    fetched_result = await result_backend.get_progress(task_id=task_id)
+    assert fetched_result == test_progress_1
+
+    # Setting the second time replaces the first
+    await result_backend.set_progress(task_id=task_id, progress=test_progress_2)
+
+    fetched_result = await result_backend.get_progress(task_id=task_id)
+    assert fetched_result == test_progress_2
+
+    await result_backend.shutdown()
+
+@pytest.mark.anyio
+async def test_set_progress_cluster(redis_cluster_url: str) -> None:
+    """
+    Test that set_progress/get_progress works in cluster mode.
+
+    :param redis_url: redis URL.
+    """
+    result_backend = RedisAsyncClusterResultBackend(  # type: ignore
+        redis_url=redis_cluster_url,
+    )
+    task_id = uuid.uuid4().hex
+
+    test_progress_1 = TaskProgress(
+        state=TaskState.STARTED,
+        meta={"message": "quarter way", "pct": 25},
+    )
+    test_progress_2 = TaskProgress(
+        state=TaskState.STARTED,
+        meta={"message": "half way", "pct": 50},
+    )
+
+    # Progress starts as None
+    assert await result_backend.get_progress(task_id=task_id) is None
+
+    # Setting the first time persists
+    await result_backend.set_progress(task_id=task_id, progress=test_progress_1)
+
+    fetched_result = await result_backend.get_progress(task_id=task_id)
+    assert fetched_result == test_progress_1
+
+    # Setting the second time replaces the first
+    await result_backend.set_progress(task_id=task_id, progress=test_progress_2)
+
+    fetched_result = await result_backend.get_progress(task_id=task_id)
+    assert fetched_result == test_progress_2
+
+    await result_backend.shutdown()