Calling Back a Flow
Function
This API is used to call back a flow.
Calling Method
For details, see Calling APIs.
Authorization Information
Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions. For details about the required permissions, see Permissions Policies and Supported Actions.
URI
POST /v2/{project_id}/fgs/workflows/{workflow_id}/callback
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| project_id | Yes | String | Definition Project ID. For details, see Obtaining a Project ID. Constraints N/A Range The value contains 32 characters. Only letters and digits are allowed. Default Value N/A |
| workflow_id | Yes | String | Definition Flow ID. Constraints N/A Range The value contains 32 characters. Only letters and digits are allowed. Default Value N/A |
Request Parameters
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| X-Workflow-Run-Id | Yes | String | workflow run id |
| X-Workflow-State-Id | Yes | String | workflow state id |
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| result | Yes | String | Execution result. |
| error | No | String | Error information. |
| output | Yes | Object | Flow execution result in JSON format. This parameter has a value only when the status is success. |
Response Parameters
Status code: 200
| Parameter | Type | Description |
|---|---|---|
| execution_id | String | Definition Function flow asynchronous task ID Range N/A |
Status code: 400
| Parameter | Type | Description |
|---|---|---|
| error_code | String | Error code. |
| error_msg | String | Error description. |
Status code: 404
| Parameter | Type | Description |
|---|---|---|
| error_code | String | Error code. |
| error_msg | String | Error description. |
Status code: 500
| Parameter | Type | Description |
|---|---|---|
| error_code | String | Error code. |
| error_msg | String | Error description. |
Example Requests
Call back a flow.
POST /v2/{project_id}/fgs/workflows/{workflow_id}/callback
{
"result" : "success",
"error" : "",
"output" : {
"result" : 200,
"message" : "success"
}
} Example Responses
Status code: 200
{
"execution_id" : "48aff955-ea10-4ffd-b426-190bc192dc13"
} SDK Sample Code
The SDK sample code is as follows.
Java
Call back a flow.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | package com.huaweicloud.sdk.test; import com.huaweicloud.sdk.core.auth.ICredential; import com.huaweicloud.sdk.core.auth.BasicCredentials; import com.huaweicloud.sdk.core.exception.ConnectionException; import com.huaweicloud.sdk.core.exception.RequestTimeoutException; import com.huaweicloud.sdk.core.exception.ServiceResponseException; import com.huaweicloud.sdk.functiongraph.v2.region.FunctionGraphRegion; import com.huaweicloud.sdk.functiongraph.v2.*; import com.huaweicloud.sdk.functiongraph.v2.model.*; public class CreateCallbackWorkflowSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK"); String projectId = "{project_id}"; ICredential auth = new BasicCredentials() .withProjectId(projectId) .withAk(ak) .withSk(sk); FunctionGraphClient client = FunctionGraphClient.newBuilder() .withCredential(auth) .withRegion(FunctionGraphRegion.valueOf("<YOUR REGION>")) .build(); CreateCallbackWorkflowRequest request = new CreateCallbackWorkflowRequest(); request.withWorkflowId("{workflow_id}"); CallbackWorkflowRequestBody body = new CallbackWorkflowRequestBody(); body.withOutput("{\"result\":200,\"message\":\"success\"}"); body.withError(""); body.withResult(CallbackWorkflowRequestBody.CallbackWorkflowRequestBody.fromValue("success")); request.withBody(body); try { CreateCallbackWorkflowResponse response = client.createCallbackWorkflow(request); System.out.println(response.toString()); } catch (ConnectionException e) { e.printStackTrace(); } catch (RequestTimeoutException e) { e.printStackTrace(); } catch (ServiceResponseException e) { e.printStackTrace(); System.out.println(e.getHttpStatusCode()); System.out.println(e.getRequestId()); System.out.println(e.getErrorCode()); System.out.println(e.getErrorMsg()); } } } |
Python
Call back a flow.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | # coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkfunctiongraph.v2.region.functiongraph_region import FunctionGraphRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkfunctiongraph.v2 import * if __name__ == "__main__": # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak = os.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] projectId = "{project_id}" credentials = BasicCredentials(ak, sk, projectId) client = FunctionGraphClient.new_builder() \ .with_credentials(credentials) \ .with_region(FunctionGraphRegion.value_of("<YOUR REGION>")) \ .build() try: request = CreateCallbackWorkflowRequest() request.workflow_id = "{workflow_id}" request.body = CallbackWorkflowRequestBody( output="{\"result\":200,\"message\":\"success\"}", error="", result="success" ) response = client.create_callback_workflow(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
Go
Call back a flow.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" functiongraph "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/functiongraph/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/functiongraph/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/functiongraph/v2/region" ) func main() { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak := os.Getenv("CLOUD_SDK_AK") sk := os.Getenv("CLOUD_SDK_SK") projectId := "{project_id}" auth, err := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). WithProjectId(projectId). SafeBuild() if err != nil { fmt.Println(err) return } hcClient, err := functiongraph.FunctionGraphClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). SafeBuild() if err != nil { fmt.Println(err) return } client := functiongraph.NewFunctionGraphClient(hcClient) request := &model.CreateCallbackWorkflowRequest{} request.WorkflowId = "{workflow_id}" var outputCallbackWorkflowRequestBody interface{} = "{\"result\":200,\"message\":\"success\"}" errorCallbackWorkflowRequestBody:= "" request.Body = &model.CallbackWorkflowRequestBody{ Output: &outputCallbackWorkflowRequestBody, Error: &errorCallbackWorkflowRequestBody, Result: model.GetCallbackWorkflowRequestBodyResultEnum().SUCCESS, } response, err := client.CreateCallbackWorkflow(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
More
For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
Status Codes
| Status Code | Description |
|---|---|
| 200 | Success |
| 400 | Bad Request |
| 404 | Bad Request |
| 500 | Internal Server Error |
Error Codes
See Error Codes.
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