Calls a specified function.
Description
You can exchange information between processes or functions by calling functions or publishing messages. The differences between calling functions and publishing messages are:
- The exchange of messages in a function call is bidirectional. After the caller sends a message to the receiver, the caller will receive the message returned by the receiver.
- Publishing messages is unidirectional. The sender does not need a response from the receiver.
invokeFunction(params)
Parameter | Type | Description |
---|---|---|
params | dict | The parameter object. For more information, see the table Parameter descriptions of params. |
Parameter | Type | Description |
---|---|---|
serviceName | String | The service name. It is the name of the service to which the function belongs in Alibaba Cloud Function Compute. |
functionName | String | The function name that is defined in Alibaba Cloud Function Compute. |
invocationType | String | The type of the function call.
|
payload | String|Bytes | The input parameter information of the function. |
Parameter | Type | Description |
---|---|---|
return | dict | The return value of the called function. |
Sample requests
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Sample code for calling a function
In the code, the function with serviceName=EdgeFC and functionName=helloworld is called.
# -*- coding: utf-8 -*- import lecoresdk edgefc = lecoresdk.Client() def handler(event, context): context = {"custom": {"data": "customData"}} invokeParams = { "serviceName": 'EdgeFC', "functionName": 'helloworld', "invocationType": 'Sync', "invokerContext": context, "payload": 'String message from Python Invoker.' }; res = edgefc.invoke_function(invokeParams) print(res) return 'OK'
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Sample code of a function to be called
The following helloworld function code indicates how a called function parses input parameters from the caller and returns the result to the caller.
# -*- coding: utf-8 -*- import logging import lecoresdk def handler(event, context): logging.debug(event) logging.debug(context) return 'hello world'