Pyzeebe

pyzeebe is a python grpc client for Zeebe.

Zeebe version support:

Getting Started

To install:

pip install pyzeebe

For full documentation please visit: https://pyzeebe.readthedocs.io/en/stable/

Usage

Worker

The ZeebeWorker class gets jobs from the gateway and runs them.

import asyncio

from pyzeebe import ZeebeWorker, Job, create_insecure_channel


channel = create_insecure_channel(hostname="localhost", port=26500) # Create grpc channel
worker = ZeebeWorker(channel) # Create a zeebe worker


async def on_error(exception: Exception, job: Job):
    """
    on_error will be called when the task fails
    """
    print(exception)
    await job.set_error_status(f"Failed to handle job {job}. Error: {str(exception)}")


@worker.task(task_type="example", exception_handler=on_error)
def example_task(input: str) -> dict:
    return {"output": f"Hello world, {input}!"}


@worker.task(task_type="example2", exception_handler=on_error)
async def another_example_task(name: str) -> dict: # Tasks can also be async
    return {"output": f"Hello world, {name} from async task!"}

loop = asyncio.get_running_loop()
loop.run_until_complete(worker.work()) # Now every time that a task with type `example` or `example2` is called, the corresponding function will be called

Stop a worker:

await zeebe_worker.stop() # Stops worker after all running jobs have been completed

Client

from pyzeebe import ZeebeClient, create_insecure_channel

# Create a zeebe client
channel = create_insecure_channel(hostname="localhost", port=26500)
zeebe_client = ZeebeClient(channel)

# Run a Zeebe process instance
process_instance_key = await zeebe_client.run_process(bpmn_process_id="My zeebe process", variables={})

# Run a process and receive the result
process_instance_key, process_result = await zeebe_client.run_process_with_result(
    bpmn_process_id="My zeebe process",
    timeout=10000
)

# Deploy a BPMN process definition
await zeebe_client.deploy_process("process.bpmn")

# Cancel a running process
await zeebe_client.cancel_process_instance(process_instance_key=12345)

# Publish message
await zeebe_client.publish_message(name="message_name", correlation_key="some_id")

Tests

Use the package manager pip to install pyzeebe

pytest tests/unit

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

Versioning

We use SemVer for versioning. For the versions available, see the tags on this repository.

In order to bump the current version run:

$ bump2version 

where part is the part that will be bumped (major/minor/patch/rc).

This will bump the version in all relevant files as well as create a git commit.

License

We use the MIT license, see LICENSE.md for details