add a run_workflows method to run many workflows in bulk (#222)

* add a run_workflows method to run many workflows in bulk

* lint

* use the dedupe exceptions when we have a dedupe

* add spawn_workflows and run_workflows with an example

* think this is how the testing works

* Add a test although it hangs on the second one - I think because of event loop stuff

* is this how I bump version

* maybe

---------

Co-authored-by: Sean Reilly <[email protected]>

examples/bulk_fanout/bulk_trigger.py

@@ -0,0 +1,52 @@
+import asyncio
+import base64
+import json
+import os
+
+from dotenv import load_dotenv
+
+from hatchet_sdk import new_client
+from hatchet_sdk.clients.admin import TriggerWorkflowOptions
+from hatchet_sdk.clients.rest.models.workflow_run import WorkflowRun
+from hatchet_sdk.clients.run_event_listener import StepRunEventType
+
+
+async def main():
+    load_dotenv()
+    hatchet = new_client()
+
+    workflowRuns: WorkflowRun = []
+
+    # we are going to run the BulkParent workflow 20 which will trigger the Child workflows n times for each n in range(20)
+    for i in range(20):
+        workflowRuns.append(
+            {
+                "workflow_name": "BulkParent",
+                "input": {"n": i},
+                "options": {
+                    "additional_metadata": {
+                        "bulk-trigger": i,
+                        "hello-{i}": "earth-{i}",
+                    },
+                },
+            }
+        )
+
+    workflowRunRefs = hatchet.admin.run_workflows(
+        workflowRuns,
+    )
+
+    results = await asyncio.gather(
+        *[workflowRunRef.result() for workflowRunRef in workflowRunRefs],
+        return_exceptions=True,
+    )
+
+    for result in results:
+        if isinstance(result, Exception):
+            print(f"An error occurred: {result}")  # Handle the exception here
+        else:
+            print(result)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/bulk_fanout/stream.py

@@ -0,0 +1,45 @@
+import asyncio
+import base64
+import json
+import os
+import random
+
+from dotenv import load_dotenv
+
+from hatchet_sdk import new_client
+from hatchet_sdk.clients.admin import TriggerWorkflowOptions
+from hatchet_sdk.clients.run_event_listener import StepRunEventType
+from hatchet_sdk.v2.hatchet import Hatchet
+
+
+async def main():
+    load_dotenv()
+    hatchet = Hatchet()
+
+    # Generate a random stream key to use to track all
+    # stream events for this workflow run.
+
+    streamKey = "streamKey"
+    streamVal = f"sk-{random.randint(1, 100)}"
+
+    # Specify the stream key as additional metadata
+    # when running the workflow.
+
+    # This key gets propagated to all child workflows
+    # and can have an arbitrary property name.
+
+    workflowRun = hatchet.admin.run_workflow(
+        "Parent",
+        {"n": 2},
+        options={"additional_metadata": {streamKey: streamVal}},
+    )
+
+    # Stream all events for the additional meta key value
+    listener = hatchet.listener.stream_by_additional_metadata(streamKey, streamVal)
+
+    async for event in listener:
+        print(event.type, event.payload)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/bulk_fanout/test_bulk_fanout.py

@@ -0,0 +1,25 @@
+import pytest
+
+from hatchet_sdk import Hatchet
+from tests.utils import fixture_bg_worker
+from tests.utils.hatchet_client import hatchet_client_fixture
+
+hatchet = hatchet_client_fixture()
+worker = fixture_bg_worker(["poetry", "run", "bulk_fanout"])
+
+
+# requires scope module or higher for shared event loop
+@pytest.mark.asyncio(scope="session")
+async def test_run(hatchet: Hatchet):
+    run = hatchet.admin.run_workflow("BulkParent", {"n": 12})
+    result = await run.result()
+    print(result)
+    assert len(result["spawn"]["results"]) == 12
+
+
+# requires scope module or higher for shared event loop
+@pytest.mark.asyncio(scope="session")
+async def test_run2(hatchet: Hatchet):
+    run = hatchet.admin.run_workflow("BulkParent", {"n": 10})
+    result = await run.result()
+    assert len(result["spawn"]["results"]) == 10

examples/bulk_fanout/trigger.py

@@ -0,0 +1,26 @@
+import asyncio
+import base64
+import json
+import os
+
+from dotenv import load_dotenv
+
+from hatchet_sdk import new_client
+from hatchet_sdk.clients.admin import TriggerWorkflowOptions
+from hatchet_sdk.clients.rest.models.workflow_run import WorkflowRun
+from hatchet_sdk.clients.run_event_listener import StepRunEventType
+
+
+async def main():
+    load_dotenv()
+    hatchet = new_client()
+
+    workflowRuns: WorkflowRun = []
+
+    event = hatchet.event.push(
+        "parent:create", {"n": 999}, {"additional_metadata": {"no-dedupe": "world"}}
+    )
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/bulk_fanout/worker.py

@@ -0,0 +1,84 @@
+import asyncio
+from typing import List
+
+from dotenv import load_dotenv
+
+from hatchet_sdk import Context, Hatchet
+from hatchet_sdk.clients.admin import ChildWorkflowRunDict
+
+load_dotenv()
+
+hatchet = Hatchet(debug=True)
+
+
+@hatchet.workflow(on_events=["parent:create"])
+class BulkParent:
+    @hatchet.step(timeout="5m")
+    async def spawn(self, context: Context):
+        print("spawning child")
+
+        context.put_stream("spawning...")
+        results = []
+
+        n = context.workflow_input().get("n", 100)
+
+        child_workflow_runs: List[ChildWorkflowRunDict] = []
+
+        for i in range(n):
+
+            child_workflow_runs.append(
+                {
+                    "workflow_name": "BulkChild",
+                    "input": {"a": str(i)},
+                    "key": f"child{i}",
+                    "options": {"additional_metadata": {"hello": "earth"}},
+                }
+            )
+
+        if len(child_workflow_runs) == 0:
+            return
+
+        spawn_results = await context.aio.spawn_workflows(child_workflow_runs)
+
+        results = await asyncio.gather(
+            *[workflowRunRef.result() for workflowRunRef in spawn_results],
+            return_exceptions=True,
+        )
+
+        print("finished spawning children")
+
+        for result in results:
+            if isinstance(result, Exception):
+                print(f"An error occurred: {result}")
+            else:
+                print(result)
+
+        return {"results": results}
+
+
+@hatchet.workflow(on_events=["child:create"])
+class BulkChild:
+    @hatchet.step()
+    def process(self, context: Context):
+        a = context.workflow_input()["a"]
+        print(f"child process {a}")
+        context.put_stream("child 1...")
+        return {"status": "success " + a}
+
+    @hatchet.step()
+    def process2(self, context: Context):
+        print("child process2")
+        context.put_stream("child 2...")
+        return {"status2": "success"}
+
+
+def main():
+
+    worker = hatchet.worker("fanout-worker", max_runs=40)
+    worker.register_workflow(BulkParent())
+    worker.register_workflow(BulkChild())
+    worker.start()
+
+
+if __name__ == "__main__":
+    main()

hatchet_sdk/clients/admin.py

@@ -5,11 +5,14 @@
 import grpc
 from google.protobuf import timestamp_pb2
 
+from hatchet_sdk.clients.rest.models.workflow_run import WorkflowRun
 from hatchet_sdk.clients.rest.tenacity_utils import tenacity_retry
 from hatchet_sdk.clients.run_event_listener import new_listener
 from hatchet_sdk.clients.workflow_listener import PooledWorkflowRunListener
 from hatchet_sdk.connection import new_conn
 from hatchet_sdk.contracts.workflows_pb2 import (
+    BulkTriggerWorkflowRequest,
+    BulkTriggerWorkflowResponse,
     CreateWorkflowVersionOpts,
     PutRateLimitRequest,
     PutWorkflowRequest,
@@ -44,6 +47,19 @@ class ChildTriggerWorkflowOptions(TypedDict):
     sticky: bool | None = None
 
 
+class WorkflowRunDict(TypedDict):
+    workflow_name: str
+    input: Any
+    options: Optional[dict]
+
+
+class ChildWorkflowRunDict(TypedDict):
+    workflow_name: str
+    input: Any
+    options: ChildTriggerWorkflowOptions[dict]
+    key: str
+
+
 class TriggerWorkflowOptions(ScheduleTriggerWorkflowOptions, TypedDict):
     additional_metadata: Dict[str, str] | None = None
     desired_worker_id: str | None = None
@@ -203,6 +219,65 @@ async def run_workflow(
 
             raise ValueError(f"gRPC error: {e}")
 
+    @tenacity_retry
+    async def run_workflows(
+        self, workflows: List[WorkflowRunDict], options: TriggerWorkflowOptions = None
+    ) -> List[WorkflowRunRef]:
+
+        if len(workflows) == 0:
+            raise ValueError("No workflows to run")
+        try:
+            if not self.pooled_workflow_listener:
+                self.pooled_workflow_listener = PooledWorkflowRunListener(self.config)
+
+            namespace = self.namespace
+
+            if (
+                options is not None
+                and "namespace" in options
+                and options["namespace"] is not None
+            ):
+                namespace = options["namespace"]
+                del options["namespace"]
+
+            workflow_run_requests: TriggerWorkflowRequest = []
+
+            for workflow in workflows:
+
+                workflow_name = workflow["workflow_name"]
+                input_data = workflow["input"]
+                options = workflow["options"]
+
+                if namespace != "" and not workflow_name.startswith(self.namespace):
+                    workflow_name = f"{namespace}{workflow_name}"
+
+                # Prepare and trigger workflow for each workflow name and input
+                request = self._prepare_workflow_request(
+                    workflow_name, input_data, options
+                )
+                workflow_run_requests.append(request)
+
+            request = BulkTriggerWorkflowRequest(workflows=workflow_run_requests)
+
+            resp: BulkTriggerWorkflowResponse = (
+                await self.aio_client.BulkTriggerWorkflow(
+                    request,
+                    metadata=get_metadata(self.token),
+                )
+            )
+
+            return [
+                WorkflowRunRef(
+                    workflow_run_id=workflow_run_id,
+                    workflow_listener=self.pooled_workflow_listener,
+                    workflow_run_event_listener=self.listener_client,
+                )
+                for workflow_run_id in resp.workflow_run_ids
+            ]
+
+        except grpc.RpcError as e:
+            raise ValueError(f"gRPC error: {e}")
+
     @tenacity_retry
     async def put_workflow(
         self,
@@ -398,6 +473,61 @@ def run_workflow(
 
             raise ValueError(f"gRPC error: {e}")
 
+    @tenacity_retry
+    def run_workflows(
+        self, workflows: List[WorkflowRunDict], options: TriggerWorkflowOptions = None
+    ) -> list[WorkflowRunRef]:
+
+        workflow_run_requests: TriggerWorkflowRequest = []
+        try:
+            if not self.pooled_workflow_listener:
+                self.pooled_workflow_listener = PooledWorkflowRunListener(self.config)
+
+            for workflow in workflows:
+
+                workflow_name = workflow["workflow_name"]
+                input_data = workflow["input"]
+                options = workflow["options"]
+
+                namespace = self.namespace
+
+                if (
+                    options is not None
+                    and "namespace" in options
+                    and options["namespace"] is not None
+                ):
+                    namespace = options["namespace"]
+                    del options["namespace"]
+
+                if namespace != "" and not workflow_name.startswith(self.namespace):
+                    workflow_name = f"{namespace}{workflow_name}"
+
+                # Prepare and trigger workflow for each workflow name and input
+                request = self._prepare_workflow_request(
+                    workflow_name, input_data, options
+                )
+
+                workflow_run_requests.append(request)
+
+                request = BulkTriggerWorkflowRequest(workflows=workflow_run_requests)
+
+            resp: BulkTriggerWorkflowResponse = self.client.BulkTriggerWorkflow(
+                request,
+                metadata=get_metadata(self.token),
+            )
+
+        except grpc.RpcError as e:
+            raise ValueError(f"gRPC error: {e}")
+
+        return [
+            WorkflowRunRef(
+                workflow_run_id=workflow_run_id,
+                workflow_listener=self.pooled_workflow_listener,
+                workflow_run_event_listener=self.listener_client,
+            )
+            for workflow_run_id in resp.workflow_run_ids
+        ]
+
     def run(
         self,
         function: Union[str, Callable[[Any], T]],