feat(awel): AWEL supports http trigger

examples/awel/simple_chat_dag_example.py

@@ -0,0 +1,54 @@
+"""AWEL: Simple chat dag example
+
+    Example:
+
+    .. code-block:: shell
+
+        curl -X POST http://127.0.0.1:5000/api/v1/awel/trigger/examples/simple_chat \
+        -H "Content-Type: application/json" -d '{
+            "model": "proxyllm",
+            "user_input": "hello"
+        }'
+"""
+from typing import Dict
+from pydantic import BaseModel, Field
+
+from pilot.awel import DAG, HttpTrigger, MapOperator
+from pilot.scene.base_message import ModelMessage
+from pilot.model.base import ModelOutput
+from pilot.model.operator.model_operator import ModelOperator
+
+
+class TriggerReqBody(BaseModel):
+    model: str = Field(..., description="Model name")
+    user_input: str = Field(..., description="User input")
+
+
+class RequestHandleOperator(MapOperator[TriggerReqBody, Dict]):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    async def map(self, input_value: TriggerReqBody) -> Dict:
+        hist = []
+        hist.append(ModelMessage.build_human_message(input_value.user_input))
+        hist = list(h.dict() for h in hist)
+        params = {
+            "prompt": input_value.user_input,
+            "messages": hist,
+            "model": input_value.model,
+            "echo": False,
+        }
+        print(f"Receive input value: {input_value}")
+        return params
+
+
+with DAG("dbgpt_awel_simple_dag_example") as dag:
+    # Receive http request and trigger dag to run.
+    trigger = HttpTrigger(
+        "/examples/simple_chat", methods="POST", request_body=TriggerReqBody
+    )
+    request_handle_task = RequestHandleOperator()
+    model_task = ModelOperator()
+    # type(out) == ModelOutput
+    model_parse_task = MapOperator(lambda out: out.to_dict())
+    trigger >> request_handle_task >> model_task >> model_parse_task

examples/awel/simple_dag_example.py

@@ -0,0 +1,32 @@
+"""AWEL: Simple dag example
+
+    Example:
+
+    .. code-block:: shell
+
+        curl -X GET http://127.0.0.1:5000/api/v1/awel/trigger/examples/hello\?name\=zhangsan
+
+"""
+from pydantic import BaseModel, Field
+
+from pilot.awel import DAG, HttpTrigger, MapOperator
+
+
+class TriggerReqBody(BaseModel):
+    name: str = Field(..., description="User name")
+    age: int = Field(18, description="User age")
+
+
+class RequestHandleOperator(MapOperator[TriggerReqBody, str]):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    async def map(self, input_value: TriggerReqBody) -> str:
+        print(f"Receive input value: {input_value}")
+        return f"Hello, {input_value.name}, your age is {input_value.age}"
+
+
+with DAG("simple_dag_example") as dag:
+    trigger = HttpTrigger("/examples/hello", request_body=TriggerReqBody)
+    map_node = RequestHandleOperator()
+    trigger >> map_node

pilot/awel/__init__.py

@@ -1,8 +1,17 @@
-"""Agentic Workflow Expression Language (AWEL)"""
+"""Agentic Workflow Expression Language (AWEL)
+
+Note:
+
+AWEL is still an experimental feature and only opens the lowest level API. 
+The stability of this API cannot be guaranteed at present.
+
+"""
+
+from pilot.component import SystemApp
 
 from .dag.base import DAGContext, DAG
 
-from .operator.base import BaseOperator, WorkflowRunner, initialize_awel
+from .operator.base import BaseOperator, WorkflowRunner
 from .operator.common_operator import (
     JoinOperator,
     ReduceStreamOperator,
@@ -28,6 +37,7 @@ from .task.task_impl import (
     SimpleStreamTaskOutput,
     _is_async_iterator,
 )
+from .trigger.http_trigger import HttpTrigger
 from .runner.local_runner import DefaultWorkflowRunner
 
 __all__ = [
@@ -57,4 +67,21 @@ __all__ = [
     "StreamifyAbsOperator",
     "UnstreamifyAbsOperator",
     "TransformStreamAbsOperator",
+    "HttpTrigger",
 ]
+
+
+def initialize_awel(system_app: SystemApp, dag_filepath: str):
+    from .dag.dag_manager import DAGManager
+    from .dag.base import DAGVar
+    from .trigger.trigger_manager import DefaultTriggerManager
+    from .operator.base import initialize_runner
+
+    DAGVar.set_current_system_app(system_app)
+
+    system_app.register(DefaultTriggerManager)
+    dag_manager = DAGManager(system_app, dag_filepath)
+    system_app.register_instance(dag_manager)
+    initialize_runner(DefaultWorkflowRunner())
+    # Load all dags
+    dag_manager.load_dags()

pilot/awel/base.py

@@ -0,0 +1,7 @@
+from abc import ABC, abstractmethod
+
+
+class Trigger(ABC):
+    @abstractmethod
+    async def trigger(self) -> None:
+        """Trigger the workflow or a specific operation in the workflow."""

pilot/awel/dag/base.py

@@ -1,14 +1,19 @@
 from abc import ABC, abstractmethod
-from typing import Optional, Dict, List, Sequence, Union, Any
+from typing import Optional, Dict, List, Sequence, Union, Any, Set
 import uuid
 import contextvars
 import threading
 import asyncio
+import logging
 from collections import deque
+from functools import cache
 
+from pilot.component import SystemApp
 from ..resource.base import ResourceGroup
 from ..task.base import TaskContext
 
+logger = logging.getLogger(__name__)
+
 DependencyType = Union["DependencyMixin", Sequence["DependencyMixin"]]
 
 
@@ -96,6 +101,7 @@ class DependencyMixin(ABC):
 class DAGVar:
     _thread_local = threading.local()
     _async_local = contextvars.ContextVar("current_dag_stack", default=deque())
+    _system_app: SystemApp = None
 
     @classmethod
     def enter_dag(cls, dag) -> None:
@@ -138,18 +144,38 @@ class DAGVar:
                 return cls._thread_local.current_dag_stack[-1]
             return None
 
+    @classmethod
+    def get_current_system_app(cls) -> SystemApp:
+        if not cls._system_app:
+            raise RuntimeError("System APP not set for DAGVar")
+        return cls._system_app
+
+    @classmethod
+    def set_current_system_app(cls, system_app: SystemApp) -> None:
+        if cls._system_app:
+            logger.warn("System APP has already set, nothing to do")
+        else:
+            cls._system_app = system_app
+
 
 class DAGNode(DependencyMixin, ABC):
     resource_group: Optional[ResourceGroup] = None
     """The resource group of current DAGNode"""
 
     def __init__(
-        self, dag: Optional["DAG"] = None, node_id: str = None, node_name: str = None
+        self,
+        dag: Optional["DAG"] = None,
+        node_id: str = None,
+        node_name: str = None,
+        system_app: SystemApp = None,
     ) -> None:
         super().__init__()
         self._upstream: List["DAGNode"] = []
         self._downstream: List["DAGNode"] = []
         self._dag: Optional["DAG"] = dag or DAGVar.get_current_dag()
+        self._system_app: Optional[SystemApp] = (
+            system_app or DAGVar.get_current_system_app()
+        )
         if not node_id and self._dag:
             node_id = self._dag._new_node_id()
         self._node_id: str = node_id
@@ -159,6 +185,10 @@ class DAGNode(DependencyMixin, ABC):
     def node_id(self) -> str:
         return self._node_id
 
+    @property
+    def system_app(self) -> SystemApp:
+        return self._system_app
+
     def set_node_id(self, node_id: str) -> None:
         self._node_id = node_id
 
@@ -178,7 +208,7 @@ class DAGNode(DependencyMixin, ABC):
         return self._node_name
 
     @property
-    def dag(self) -> "DAGNode":
+    def dag(self) -> "DAG":
         return self._dag
 
     def set_upstream(self, nodes: DependencyType) -> "DAGNode":
@@ -254,17 +284,69 @@ class DAG:
     def __init__(
         self, dag_id: str, resource_group: Optional[ResourceGroup] = None
     ) -> None:
+        self._dag_id = dag_id
         self.node_map: Dict[str, DAGNode] = {}
+        self._root_nodes: Set[DAGNode] = None
+        self._leaf_nodes: Set[DAGNode] = None
+        self._trigger_nodes: Set[DAGNode] = None
 
     def _append_node(self, node: DAGNode) -> None:
         self.node_map[node.node_id] = node
+        # clear cached nodes
+        self._root_nodes = None
+        self._leaf_nodes = None
 
     def _new_node_id(self) -> str:
         return str(uuid.uuid4())
 
+    @property
+    def dag_id(self) -> str:
+        return self._dag_id
+
+    def _build(self) -> None:
+        from ..operator.common_operator import TriggerOperator
+
+        nodes = set()
+        for _, node in self.node_map.items():
+            nodes = nodes.union(_get_nodes(node))
+        self._root_nodes = list(set(filter(lambda x: not x.upstream, nodes)))
+        self._leaf_nodes = list(set(filter(lambda x: not x.downstream, nodes)))
+        self._trigger_nodes = list(
+            set(filter(lambda x: isinstance(x, TriggerOperator), nodes))
+        )
+
+    @property
+    def root_nodes(self) -> List[DAGNode]:
+        if not self._root_nodes:
+            self._build()
+        return self._root_nodes
+
+    @property
+    def leaf_nodes(self) -> List[DAGNode]:
+        if not self._leaf_nodes:
+            self._build()
+        return self._leaf_nodes
+
+    @property
+    def trigger_nodes(self):
+        if not self._trigger_nodes:
+            self._build()
+        return self._trigger_nodes
+
     def __enter__(self):
         DAGVar.enter_dag(self)
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         DAGVar.exit_dag()
+
+
+def _get_nodes(node: DAGNode, is_upstream: Optional[bool] = True) -> set[DAGNode]:
+    nodes = set()
+    if not node:
+        return nodes
+    nodes.add(node)
+    stream_nodes = node.upstream if is_upstream else node.downstream
+    for node in stream_nodes:
+        nodes = nodes.union(_get_nodes(node, is_upstream))
+    return nodes

pilot/awel/dag/dag_manager.py

@@ -0,0 +1,42 @@
+from typing import Dict, Optional
+import logging
+from pilot.component import BaseComponent, ComponentType, SystemApp
+from .loader import DAGLoader, LocalFileDAGLoader
+from .base import DAG
+
+logger = logging.getLogger(__name__)
+
+
+class DAGManager(BaseComponent):
+    name = ComponentType.AWEL_DAG_MANAGER
+
+    def __init__(self, system_app: SystemApp, dag_filepath: str):
+        super().__init__(system_app)
+        self.dag_loader = LocalFileDAGLoader(dag_filepath)
+        self.system_app = system_app
+        self.dag_map: Dict[str, DAG] = {}
+
+    def init_app(self, system_app: SystemApp):
+        self.system_app = system_app
+
+    def load_dags(self):
+        dags = self.dag_loader.load_dags()
+        triggers = []
+        for dag in dags:
+            dag_id = dag.dag_id
+            if dag_id in self.dag_map:
+                raise ValueError(f"Load DAG error, DAG ID {dag_id} has already exist")
+            triggers += dag.trigger_nodes
+        from ..trigger.trigger_manager import DefaultTriggerManager
+
+        trigger_manager: DefaultTriggerManager = self.system_app.get_component(
+            ComponentType.AWEL_TRIGGER_MANAGER,
+            DefaultTriggerManager,
+            default_component=None,
+        )
+        if trigger_manager:
+            for trigger in triggers:
+                trigger_manager.register_trigger(trigger)
+            trigger_manager.after_register()
+        else:
+            logger.warn("No trigger manager, not register dag trigger")

pilot/awel/dag/loader.py

@@ -0,0 +1,93 @@
+from abc import ABC, abstractmethod
+from typing import List
+import os
+import hashlib
+import sys
+import logging
+import traceback
+
+from .base import DAG
+
+logger = logging.getLogger(__name__)
+
+
+class DAGLoader(ABC):
+    @abstractmethod
+    def load_dags(self) -> List[DAG]:
+        """Load dags"""
+
+
+class LocalFileDAGLoader(DAGLoader):
+    def __init__(self, filepath: str) -> None:
+        super().__init__()
+        self._filepath = filepath
+
+    def load_dags(self) -> List[DAG]:
+        if not os.path.exists(self._filepath):
+            return []
+        if os.path.isdir(self._filepath):
+            return _process_directory(self._filepath)
+        else:
+            return _process_file(self._filepath)
+
+
+def _process_directory(directory: str) -> List[DAG]:
+    dags = []
+    for file in os.listdir(directory):
+        if file.endswith(".py"):
+            filepath = os.path.join(directory, file)
+            dags += _process_file(filepath)
+    return dags
+
+
+def _process_file(filepath) -> List[DAG]:
+    mods = _load_modules_from_file(filepath)
+    results = _process_modules(mods)
+    return results
+
+
+def _load_modules_from_file(filepath: str):
+    import importlib
+    import importlib.machinery
+    import importlib.util
+
+    logger.info(f"Importing {filepath}")
+
+    org_mod_name, _ = os.path.splitext(os.path.split(filepath)[-1])
+    path_hash = hashlib.sha1(filepath.encode("utf-8")).hexdigest()
+    mod_name = f"unusual_prefix_{path_hash}_{org_mod_name}"
+
+    if mod_name in sys.modules:
+        del sys.modules[mod_name]
+
+    def parse(mod_name, filepath):
+        try:
+            loader = importlib.machinery.SourceFileLoader(mod_name, filepath)
+            spec = importlib.util.spec_from_loader(mod_name, loader)
+            new_module = importlib.util.module_from_spec(spec)
+            sys.modules[spec.name] = new_module
+            loader.exec_module(new_module)
+            return [new_module]
+        except Exception as e:
+            msg = traceback.format_exc()
+            logger.error(f"Failed to import: {filepath}, error message: {msg}")
+            # TODO save error message
+            return []
+
+    return parse(mod_name, filepath)
+
+
+def _process_modules(mods) -> List[DAG]:
+    top_level_dags = (
+        (o, m) for m in mods for o in m.__dict__.values() if isinstance(o, DAG)
+    )
+    found_dags = []
+    for dag, mod in top_level_dags:
+        try:
+            # TODO validate dag params
+            logger.info(f"Found dag {dag} from mod {mod} and model file {mod.__file__}")
+            found_dags.append(dag)
+        except Exception:
+            msg = traceback.format_exc()
+            logger.error(f"Failed to dag file, error message: {msg}")
+    return found_dags

pilot/awel/operator/base.py

@@ -14,6 +14,7 @@ from typing import (
 )
 import functools
 from inspect import signature
+from pilot.component import SystemApp
 
 from ..dag.base import DAGNode, DAGContext, DAGVar, DAG
 from ..task.base import (
@@ -67,6 +68,9 @@ class BaseOperatorMeta(ABCMeta):
         def apply_defaults(self: "BaseOperator", *args: Any, **kwargs: Any) -> Any:
             dag: Optional[DAG] = kwargs.get("dag") or DAGVar.get_current_dag()
             task_id: Optional[str] = kwargs.get("task_id")
+            system_app: Optional[SystemApp] = (
+                kwargs.get("system_app") or DAGVar.get_current_system_app()
+            )
             if not task_id and dag:
                 task_id = dag._new_node_id()
             runner: Optional[WorkflowRunner] = kwargs.get("runner") or default_runner
@@ -80,6 +84,8 @@ class BaseOperatorMeta(ABCMeta):
                 kwargs["task_id"] = task_id
             if not kwargs.get("runner"):
                 kwargs["runner"] = runner
+            if not kwargs.get("system_app"):
+                kwargs["system_app"] = system_app
             real_obj = func(self, *args, **kwargs)
             return real_obj
 
@@ -172,6 +178,6 @@ class BaseOperator(DAGNode, ABC, Generic[OUT], metaclass=BaseOperatorMeta):
         return out_ctx.current_task_context.task_output.output_stream
 
 
-def initialize_awel(runner: WorkflowRunner):
+def initialize_runner(runner: WorkflowRunner):
     global default_runner
     default_runner = runner

pilot/awel/operator/common_operator.py

@@ -237,3 +237,10 @@ class InputOperator(BaseOperator, Generic[OUT]):
         task_output = await self._input_source.read(curr_task_ctx)
         curr_task_ctx.set_task_output(task_output)
         return task_output
+
+
+class TriggerOperator(InputOperator, Generic[OUT]):
+    def __init__(self, **kwargs) -> None:
+        from ..task.task_impl import SimpleCallDataInputSource
+
+        super().__init__(input_source=SimpleCallDataInputSource(), **kwargs)

pilot/awel/runner/local_runner.py

@@ -3,7 +3,7 @@ import logging
 
 from ..dag.base import DAGContext
 from ..operator.base import WorkflowRunner, BaseOperator, CALL_DATA
-from ..operator.common_operator import BranchOperator, JoinOperator
+from ..operator.common_operator import BranchOperator, JoinOperator, TriggerOperator
 from ..task.base import TaskContext, TaskState
 from ..task.task_impl import DefaultInputContext, DefaultTaskContext, SimpleTaskOutput
 from .job_manager import JobManager

pilot/awel/trigger/base.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+from abc import ABC, abstractmethod
+
+from ..operator.base import BaseOperator
+from ..operator.common_operator import TriggerOperator
+from ..dag.base import DAGContext
+from ..task.base import TaskOutput
+
+
+class Trigger(TriggerOperator, ABC):
+    @abstractmethod
+    async def trigger(self, end_operator: "BaseOperator") -> None:
+        """Trigger the workflow or a specific operation in the workflow."""

pilot/awel/trigger/http_trigger.py

@@ -0,0 +1,117 @@
+from __future__ import annotations
+
+from typing import Union, Type, List, TYPE_CHECKING, Optional, Any, Dict
+from starlette.requests import Request
+from starlette.responses import Response
+from pydantic import BaseModel
+import logging
+
+from .base import Trigger
+from ..operator.base import BaseOperator
+
+if TYPE_CHECKING:
+    from fastapi import APIRouter, FastAPI
+
+RequestBody = Union[Request, Type[BaseModel], str]
+
+logger = logging.getLogger(__name__)
+
+
+class HttpTrigger(Trigger):
+    def __init__(
+        self,
+        endpoint: str,
+        methods: Optional[Union[str, List[str]]] = "GET",
+        request_body: Optional[RequestBody] = None,
+        streaming_response: Optional[bool] = False,
+        response_model: Optional[Type] = None,
+        response_headers: Optional[Dict[str, str]] = None,
+        response_media_type: Optional[str] = None,
+        status_code: Optional[int] = 200,
+        router_tags: Optional[List[str]] = None,
+        **kwargs,
+    ) -> None:
+        super().__init__(**kwargs)
+        if not endpoint.startswith("/"):
+            endpoint = "/" + endpoint
+        self._endpoint = endpoint
+        self._methods = methods
+        self._req_body = request_body
+        self._streaming_response = streaming_response
+        self._response_model = response_model
+        self._status_code = status_code
+        self._router_tags = router_tags
+        self._response_headers = response_headers
+        self._response_media_type = response_media_type
+        self._end_node: BaseOperator = None
+
+    async def trigger(self) -> None:
+        pass
+
+    def mount_to_router(self, router: "APIRouter") -> None:
+        from fastapi import Depends
+        from fastapi.responses import StreamingResponse
+
+        methods = self._methods if isinstance(self._methods, list) else [self._methods]
+
+        def create_route_function(name):
+            async def _request_body_dependency(request: Request):
+                return await _parse_request_body(request, self._req_body)
+
+            async def route_function(body: Any = Depends(_request_body_dependency)):
+                end_node = self.dag.leaf_nodes
+                if len(end_node) != 1:
+                    raise ValueError("HttpTrigger just support one leaf node in dag")
+                end_node = end_node[0]
+                if not self._streaming_response:
+                    return await end_node.call(call_data={"data": body})
+                else:
+                    headers = self._response_headers
+                    media_type = (
+                        self._response_media_type
+                        if self._response_media_type
+                        else "text/event-stream"
+                    )
+                    if not headers:
+                        headers = {
+                            "Content-Type": "text/event-stream",
+                            "Cache-Control": "no-cache",
+                            "Connection": "keep-alive",
+                            "Transfer-Encoding": "chunked",
+                        }
+                    return StreamingResponse(
+                        end_node.call_stream(call_data={"data": body}),
+                        headers=headers,
+                        media_type=media_type,
+                    )
+
+            route_function.__name__ = name
+            return route_function
+
+        function_name = f"dynamic_route_{self._endpoint.replace('/', '_')}"
+        dynamic_route_function = create_route_function(function_name)
+        logger.info(
+            f"mount router function {dynamic_route_function}({function_name}), endpoint: {self._endpoint}, methods: {methods}"
+        )
+
+        router.api_route(
+            self._endpoint,
+            methods=methods,
+            response_model=self._response_model,
+            status_code=self._status_code,
+            tags=self._router_tags,
+        )(dynamic_route_function)
+
+
+async def _parse_request_body(
+    request: Request, request_body_cls: Optional[Type[BaseModel]]
+):
+    if not request_body_cls:
+        return None
+    if request.method == "POST":
+        json_data = await request.json()
+        return request_body_cls(**json_data)
+    elif request.method == "GET":
+        return request_body_cls(**request.query_params)
+    else:
+        return request

pilot/awel/trigger/trigger_manager.py

@@ -0,0 +1,74 @@
+from abc import ABC, abstractmethod
+from typing import Any, TYPE_CHECKING, Optional
+import logging
+
+if TYPE_CHECKING:
+    from fastapi import APIRouter
+
+from pilot.component import SystemApp, BaseComponent, ComponentType
+
+logger = logging.getLogger(__name__)
+
+
+class TriggerManager(ABC):
+    @abstractmethod
+    def register_trigger(self, trigger: Any) -> None:
+        """ "Register a trigger to current manager"""
+
+
+class HttpTriggerManager(TriggerManager):
+    def __init__(
+        self,
+        router: Optional["APIRouter"] = None,
+        router_prefix: Optional[str] = "/api/v1/awel/trigger",
+    ) -> None:
+        if not router:
+            from fastapi import APIRouter
+
+            router = APIRouter()
+        self._router_prefix = router_prefix
+        self._router = router
+        self._trigger_map = {}
+
+    def register_trigger(self, trigger: Any) -> None:
+        from .http_trigger import HttpTrigger
+
+        if not isinstance(trigger, HttpTrigger):
+            raise ValueError(f"Current trigger {trigger} not an object of HttpTrigger")
+        trigger: HttpTrigger = trigger
+        trigger_id = trigger.node_id
+        if trigger_id not in self._trigger_map:
+            trigger.mount_to_router(self._router)
+            self._trigger_map[trigger_id] = trigger
+
+    def _init_app(self, system_app: SystemApp):
+        logger.info(
+            f"Include router {self._router} to prefix path {self._router_prefix}"
+        )
+        system_app.app.include_router(
+            self._router, prefix=self._router_prefix, tags=["AWEL"]
+        )
+
+
+class DefaultTriggerManager(TriggerManager, BaseComponent):
+    name = ComponentType.AWEL_TRIGGER_MANAGER
+
+    def __init__(self, system_app: SystemApp | None = None):
+        self.system_app = system_app
+        self.http_trigger = HttpTriggerManager()
+        super().__init__(None)
+
+    def init_app(self, system_app: SystemApp):
+        self.system_app = system_app
+
+    def register_trigger(self, trigger: Any) -> None:
+        from .http_trigger import HttpTrigger
+
+        if isinstance(trigger, HttpTrigger):
+            logger.info(f"Register trigger {trigger}")
+            self.http_trigger.register_trigger(trigger)
+        else:
+            raise ValueError(f"Unsupport trigger: {trigger}")
+
+    def after_register(self) -> None:
+        self.http_trigger._init_app(self.system_app)

pilot/component.py

@@ -54,6 +54,8 @@ class ComponentType(str, Enum):
     TRACER = "dbgpt_tracer"
     TRACER_SPAN_STORAGE = "dbgpt_tracer_span_storage"
     RAG_GRAPH_DEFAULT = "dbgpt_rag_engine_default"
+    AWEL_TRIGGER_MANAGER = "dbgpt_awel_trigger_manager"
+    AWEL_DAG_MANAGER = "dbgpt_awel_dag_manager"
 
 
 class BaseComponent(LifeCycle, ABC):

pilot/configs/model_config.py

@@ -16,6 +16,7 @@ DATA_DIR = os.path.join(PILOT_PATH, "data")
 PLUGINS_DIR = os.path.join(ROOT_PATH, "plugins")
 FONT_DIR = os.path.join(PILOT_PATH, "fonts")
 MODEL_DISK_CACHE_DIR = os.path.join(DATA_DIR, "model_cache")
+_DAG_DEFINITION_DIR = os.path.join(ROOT_PATH, "examples/awel")
 
 current_directory = os.getcwd()
 

pilot/model/operator/model_operator.py

@@ -7,9 +7,10 @@ from pilot.awel import (
     MapOperator,
     TransformStreamAbsOperator,
 )
+from pilot.component import ComponentType
 from pilot.awel.operator.base import BaseOperator
 from pilot.model.base import ModelOutput
-from pilot.model.cluster import WorkerManager
+from pilot.model.cluster import WorkerManager, WorkerManagerFactory
 from pilot.cache import LLMCacheClient, CacheManager, LLMCacheKey, LLMCacheValue
 
 logger = logging.getLogger(__name__)
@@ -29,7 +30,7 @@ class ModelStreamOperator(StreamifyAbsOperator[Dict, ModelOutput]):
         streamify: Asynchronously processes a stream of inputs, yielding model outputs.
     """
 
-    def __init__(self, worker_manager: WorkerManager, **kwargs) -> None:
+    def __init__(self, worker_manager: WorkerManager = None, **kwargs) -> None:
         super().__init__(**kwargs)
         self.worker_manager = worker_manager
 
@@ -42,6 +43,10 @@ class ModelStreamOperator(StreamifyAbsOperator[Dict, ModelOutput]):
         Returns:
             AsyncIterator[ModelOutput]: An asynchronous iterator of model outputs.
         """
+        if not self.worker_manager:
+            self.worker_manager = self.system_app.get_component(
+                ComponentType.WORKER_MANAGER_FACTORY, WorkerManagerFactory
+            ).create()
         async for out in self.worker_manager.generate_stream(input_value):
             yield out
 
@@ -57,9 +62,9 @@ class ModelOperator(MapOperator[Dict, ModelOutput]):
         map: Asynchronously processes a single input and returns the model output.
     """
 
-    def __init__(self, worker_manager: WorkerManager, **kwargs) -> None:
+    def __init__(self, worker_manager: WorkerManager = None, **kwargs) -> None:
-        self.worker_manager = worker_manager
         super().__init__(**kwargs)
+        self.worker_manager = worker_manager
 
     async def map(self, input_value: Dict) -> ModelOutput:
         """Process a single input and return the model output.
@@ -70,6 +75,10 @@ class ModelOperator(MapOperator[Dict, ModelOutput]):
         Returns:
             ModelOutput: The output from the model.
         """
+        if not self.worker_manager:
+            self.worker_manager = self.system_app.get_component(
+                ComponentType.WORKER_MANAGER_FACTORY, WorkerManagerFactory
+            ).create()
         return await self.worker_manager.generate(input_value)
 
 

pilot/scene/base_message.py

@@ -117,6 +117,10 @@ class ModelMessage(BaseModel):
     def to_dict_list(messages: List["ModelMessage"]) -> List[Dict[str, str]]:
         return list(map(lambda m: m.dict(), messages))
 
+    @staticmethod
+    def build_human_message(content: str) -> "ModelMessage":
+        return ModelMessage(role=ModelMessageRoleType.HUMAN, content=content)
+
 
 class Generation(BaseModel):
     """Output of a single generation."""

pilot/server/component_configs.py

@@ -45,6 +45,7 @@ def initialize_components(
         param, system_app, embedding_model_name, embedding_model_path
     )
     _initialize_model_cache(system_app)
+    _initialize_awel(system_app)
 
 
 def _initialize_embedding_model(
@@ -149,3 +150,10 @@ def _initialize_model_cache(system_app: SystemApp):
     max_memory_mb = CFG.MODEL_CACHE_MAX_MEMORY_MB or 256
     persist_dir = CFG.MODEL_CACHE_STORAGE_DISK_DIR or MODEL_DISK_CACHE_DIR
     initialize_cache(system_app, storage_type, max_memory_mb, persist_dir)
+
+
+def _initialize_awel(system_app: SystemApp):
+    from pilot.awel import initialize_awel
+    from pilot.configs.model_config import _DAG_DEFINITION_DIR
+
+    initialize_awel(system_app, _DAG_DEFINITION_DIR)

pilot/utils/parameter_utils.py

@@ -1,9 +1,14 @@
 import argparse
 import os
 from dataclasses import dataclass, fields, MISSING, asdict, field, is_dataclass
-from typing import Any, List, Optional, Type, Union, Callable, Dict
+from typing import Any, List, Optional, Type, Union, Callable, Dict, TYPE_CHECKING
 from collections import OrderedDict
 
+if TYPE_CHECKING:
+    from pydantic import BaseModel
+
+MISSING_DEFAULT_VALUE = "__MISSING_DEFAULT_VALUE__"
+
 
 @dataclass
 class ParameterDescription:
@@ -613,6 +618,64 @@ def _get_dict_from_obj(obj, default_value=None) -> Optional[Dict]:
     return default_value
 
 
+def _get_base_model_descriptions(model_cls: "BaseModel") -> List[ParameterDescription]:
+    import pydantic
+
+    version = int(pydantic.VERSION.split(".")[0])
+    schema = model_cls.model_json_schema() if version >= 2 else model_cls.schema()
+    required_fields = set(schema.get("required", []))
+    param_descs = []
+    for field_name, field_schema in schema.get("properties", {}).items():
+        field = model_cls.model_fields[field_name]
+        param_type = field_schema.get("type")
+        if not param_type and "anyOf" in field_schema:
+            for any_of in field_schema["anyOf"]:
+                if any_of["type"] != "null":
+                    param_type = any_of["type"]
+                    break
+        if version >= 2:
+            default_value = (
+                field.default
+                if hasattr(field, "default")
+                and str(field.default) != "PydanticUndefined"
+                else None
+            )
+        else:
+            default_value = (
+                field.default
+                if not field.allow_none
+                else (
+                    field.default_factory() if callable(field.default_factory) else None
+                )
+            )
+        description = field_schema.get("description", "")
+        is_required = field_name in required_fields
+        valid_values = None
+        ext_metadata = None
+        if hasattr(field, "field_info"):
+            valid_values = (
+                list(field.field_info.choices)
+                if hasattr(field.field_info, "choices")
+                else None
+            )
+            ext_metadata = (
+                field.field_info.extra if hasattr(field.field_info, "extra") else None
+            )
+        param_class = (f"{model_cls.__module__}.{model_cls.__name__}",)
+        param_desc = ParameterDescription(
+            param_class=param_class,
+            param_name=field_name,
+            param_type=param_type,
+            default_value=default_value,
+            description=description,
+            required=is_required,
+            valid_values=valid_values,
+            ext_metadata=ext_metadata,
+        )
+        param_descs.append(param_desc)
+    return param_descs
+
+
 class _SimpleArgParser:
     def __init__(self, *args):
         self.params = {arg.replace("_", "-"): None for arg in args}