问题内容
我有一个用 python 编写的 azure 持久函数，带有一个协调器和两个活动函数
orchestrator 调用第一个活动函数，并作为回报接收一个列表变量（名称列表和此列表可以在每次执行函数时都是动态的）
下一步是为每个列表项调用第二个活动函数（顺序处理 - 由于第二个活动函数调用的 api 限制）
#dynamically gets generated by the first activity function
payload=[1,2,3,4]
tasks = [context.call_activity("secondfunction",ps) for ps in payload]
output = yield context.task_all(tasks)
我在扇出方法中使用的不是串行的，但我似乎无法找到我想要做的事情的替代方法。
此外，在 host.json 文件中，我尝试强制在给定时间只能运行一个活动函数，以避免并行处理
"extensions": {
"durableTask": {
"maxConcurrentActivityFunctions": 1,
"maxConcurrentOrchestratorFunctions": 1
}
}
还值得注意的是，我无法将整个列表传递给活动函数，就好像我执行活动函数将花费超过 5-10 分钟，这是 azure 函数的超时限制，因此尝试迭代列表编排功能
但结果不是连续的
非常感谢您的反馈
正确答案
您可以尝试使用以下两种方法来实现您的要求：-
方法 1：-
我的function_app.py：-
import azure.functions as func
import azure.durable_functions as df
myapp = df.dfapp(http_auth_level=func.authlevel.anonymous)
# http starter
@myapp.route(route="orchestrators/{functionname}")
@myapp.durable_client_input(client_name="client")
async def http_start(req: func.httprequest, client):
function_name = req.route_params.get('functionname')
instance_id = await client.start_new(function_name, none) # pass the functionname here
response = client.create_check_status_response(req, instance_id)
return response
# orchestrator
@myapp.orchestration_trigger(context_name="context")
def hello_orchestrator(context):
cities = ["seattle", "tokyo", "london"]
tasks = []
for city in cities:
tasks.append(context.call_activity("hello", city))
# wait for all tasks to complete
results = yield context.task_all(tasks)
return results
# activity
@myapp.activity_trigger(input_name="city")
def hello(city: str):
print(f"processing {city}...")
# your activity function logic goes here
result = f"hello {city}!"
return result
输出：-
函数 url：-
http://localhost:7071/api/orchestrators/hello_orchestrator
方法 2：-
function_app.py：-
import azure.functions as func
import azure.durable_functions as df
myApp = df.DFApp(http_auth_level=func.AuthLevel.ANONYMOUS)
# HTTP Starter
@myApp.route(route="orchestrators/{functionName}")
@myApp.durable_client_input(client_name="client")
async def http_start(req: func.HttpRequest, client):
function_name = req.route_params.get('functionName')
instance_id = await client.start_new(function_name, None) # Pass the functionName here
response = client.create_check_status_response(req, instance_id)
return response
# Orchestrator
@myApp.orchestration_trigger(context_name="context")
def hello_orchestrator(context):
# Call the first activity to get a list of names
names_list = yield context.call_activity("get_names")
# Process each name sequentially using the second activity
results = []
for name in names_list:
result = yield context.call_activity("process_name", name)
results.append(result)
return results
# First Activity
@myApp.activity_trigger
def get_names():
# Your logic to retrieve a dynamic list of names goes here
# For demonstration purposes, returning a hardcoded list
return ["John", "Alice", "Bob"]
# Second Activity
@myApp.activity_trigger(input_name="name")
def process_name(name: str):
print(f"Processing {name}...")
# Your logic to process each name goes here
result = f"Hello {name}!"
return result
