Functions-SDK for Python

This SDK provides the csfunctions library for developing Functions with Python.

Functions are deeply integrated in the CIM Database Cloud Webhooks technology. They are designed to work seamlessly together. The goal is to allow implementing custom business logic in a CIM Database Cloud SaaS application without leaving the CONTACT Cloud and without the need to create and maintain a separate infrastructure.

Documentation: https://cslab.github.io/functions-sdk-python/

Source code: https://github.com/cslab/functions-sdk-python

Requirements

Python 3.10+

csfunctions is built with Pydantic 2

Installation

Install using pip:

pip install contactsoftware-functions

Usage

Build the Function

Folder content of a minimal example for a Function implementation:

  my_example_functions/
  ├── environment.yaml
  ├── mymodule.py
  └── requirements.txt

Code for a Function:

import requests
import json

from csfunctions import MetaData, Service
from csfunctions.events import DocumentReleaseEvent

def send_doc_to_erp(metadata: MetaData, event: DocumentReleaseEvent, service: Service):
  # iterate over the documents contained in the event
  for document in event.data.documents:
    # create the payload for our (fictional ERP system)
    payload = json.dumps({
      "document_number": document.z_nummer,
      "document_index": document.z_index,
      "document_title": document.titel
    })
    res = requests.post("https://example.com", data=payload)
    if res.status_code != 200:
      return ValueError(f"Failed to upload document to ERP. Got response code {res.status_code}")

Environment file to define runtime and Function entrypoints:

runtime: python3.10
version: v1
functions:
  - name: send_doc_to_erp
    entrypoint: mymodule.send_doc_to_erp

Define requirements:

contactsoftware-functions

Deploy the Code

To deploy the Code you first need to install the contactsoftware-functions-client and retrieve developer credentials in the CONTACT Portal.

Install client:

pip install contactsoftware-functions-client

Login:

cfc login

Create a new environment:

cfc env create myenv

Upload code into new environment:

cfc env deploy myenv