knix can not support parallel states.

[Lambda Shi]

• I solve the issue by modify the code in /home/ubuntu/.local/lib/python3.8/site-packages/mfn_sdk/workflow.py. Then I can run the code example in issue151
  

• I try to deploy a worflow, where A->B, A->C, B and C ara parallel. I deploy it success and its visualization is below.
  

my code for this workflow is below. I think there is some bug in knix

import time
import logging
from mfn_sdk import MfnClient

host = 'myhost'


c = MfnClient(
    mfn_url=f'http://{host}',
    mfn_user="lmyemail",
    mfn_password="mypassword",
    # mfn_name="test",
    proxies={
        "http": f'http://{host}:12345',
        "https": f'http://{host}:23456'
    })


logging.basicConfig(level=logging.DEBUG)

workflow = c.add_workflow("echo_wf_parallel")
workflow.json = """
{
  "StartAt": "A",
  "States": {
    "A": {
      "Type": "Task",
      "Resource": "A",
      "Next": "ParallelState"
    },
    "ParallelState": {
      "Type": "Parallel",
      "Branches": [
        {
          "StartAt": "B",
          "States": {
            "B": {
              "Type": "Task",
              "Resource": "B",
              "End": true
            }
          }
        },
        {
          "StartAt": "C",
          "States": {
            "C": {
              "Type": "Task",
              "Resource": "C",
              "End": true
            }
          }
        }
      ],
      "End": true
    }
  }
}

"""

fn = c.add_function("A")
fn.source = {'code': """
def handle(event, context):
    import time
    context.log("Echoing event: "+str(event))
    time.sleep(1.4)
    print("dhy")
    return event
"""}


fn = c.add_function("B")
fn.source = {'code': """
def handle(event, context):
    import time
    context.log("Echoing event: "+str(event))
    time.sleep(1.2)
    print("dhy")
    return event
"""}


fn = c.add_function("C")
fn.source = {'code': """
def handle(event, context):
    import time
    context.log("Echoing event: "+str(event))
    time.sleep(1.6)
    print("dhy")
    return event
"""}


workflow.deploy(600)

request = {"hui":"hoi","blue":True,"Five":5}
start = time.time()
response = workflow.execute(request,timeout=5)
print(time.time() - start)
print(response)
# assert response == request

logdata = workflow.logs()
print("Exceptions:")
print(logdata['exceptions'])
print("Logs:")
print(logdata['log'])
print("Progress:")
print(logdata['progress'])

[Lambda Shi]

@iakkus sorry to bother you. thank you very much

[Istemi Ekin Akkus]

To create a parallel state, you need another state that is used to collect the results of the parallel branches.

Please use the tests folder examples as templates.

Your workflow has two End states, which means when one finishes before the other (most probably) and even if they finish simultaneously, the client is awaiting a single response, not two.

[Lambda Shi]

@iakkus thank you very much

• I think maybe something wrong. For example. example-json1 where add and substract are parallel and they both have End states. example-json2 has a branch that has three branch. Branch1Terminal and Branch2Terminal and Branch3Terminal have End states.

• I modify my code in the below. the client can not get the result. The client is blocked

import time
import logging
from mfn_sdk import MfnClient

host = 'XXXX'


c = MfnClient(
    mfn_url=f'http://{host}',
    mfn_user="xxxx",
    mfn_password="xxx",
    # mfn_name="test",
    proxies={
        "http": f'http://{host}:12345',
        "https": f'http://{host}:23456'
    })


logging.basicConfig(level=logging.DEBUG)

workflow = c.add_workflow("echo_wf_parallel_test")
workflow.json = """
{
  "StartAt": "A",
  "States": {
    "A": {
      "Type": "Task",
      "Resource": "A",
      "Next": "ParallelState"
    },
    "ParallelState": {
      "Type": "Parallel",
      "End":true,
      "Branches": [
        {
          "StartAt": "B",
          "States": {
            "B": {
              "Type": "Task",
              "Resource": "B",
              "End":true
            }
          }
        },
        {
          "StartAt": "C",
          "States": {
            "C": {
              "Type": "Task",
              "Resource": "C",
              "End": true
            }
          }
        }
      ]
    }
  }
}

"""

fn = c.add_function("A")
fn.source = {'code': """
def handle(event, context):
    import time
    context.log("Echoing event: "+str(event))
    time.sleep(1.4)
    print("dhy")
    return event
"""}


fn = c.add_function("B")
fn.source = {'code': """
def handle(event, context):
    import time
    context.log("Echoing event: "+str(event))
    time.sleep(1.2)
    print("dhy")
    return event
"""}


fn = c.add_function("C")
fn.source = {'code': """
def handle(event, context):
    import time
    context.log("Echoing event: "+str(event))
    time.sleep(1.6)
    print("dhy")
    return event
"""}


workflow.deploy(600)

request = {"hui":"hoi","blue":True,"Five":5}
start = time.time()
response = workflow.execute(request,timeout=5)
print(time.time() - start)
print(response)
# # assert response == request

logdata = workflow.logs()
print("Exceptions:")
# print(logdata['exceptions'])
# print("Logs:")
# print(logdata['log'])
# print("Progress:")
# print(logdata['progress'])

[Istemi Ekin Akkus]

Then please use and modify one of those templates to write your workflow/functions. It is not really easy to debug from your code. If it still does not work, then reopen.

[Lambda Shi]

Then please use and modify one of those templates to write your workflow/functions. It is not really easy to debug from your code. If it still does not work, then reopen.

thanks. I use this templates to write my workflow. But it does not work

[Lambda Shi]

Then please use and modify one of those templates to write your workflow/functions. It is not really easy to debug from your code. If it still does not work, then reopen.

thanks. I use this templates to write my workflow. But it does not work