Embedded workflow-manager

Embedded workflow manager implements a self-contained version of workflow-manager. It allows applications to create a set of workflow definitions that are isolated to the application itself. It also lets applications create workflow definitions where Tasks are handled by functions within the application code. It is backed by AWS Step Functions (SFN).

Features

Minimal dependencies

The only dependency is AWS Step Functions.

Functions to handle states

When defining Task states, the only allowed Resource is a reference to a Go function.

Workflow definitions in YAML

Workflow definitions are loaded from a YAML file at runtime.

Limitations

Sync and search

Embedded workflow-manager does not sync the state of executions in Step Functions into a database of its own. Workflows are retrieved directly from the SFN executions API, and passed through to client methods involving workflows (GetWorkflows, GetWorkflowByID, ...) updated when they are pulled when they are retrieved via GetWorkflowByID.

GetWorkflows only supports listing workflows by workflow definition name.

Versioning of workflow definitions

There is no versioning of workflow definitions--workflow definitions are considered unique by: (1) their name, (2) the application's name, (3) the environment the application is running in (e.g. production).

Example

See example/ directory.