Demonstrates practical usage of the workflow replay functions.

This sample provides several functions illustrating workflow replay functionality:

• replay_from_file/0 - replays a workflow execution using a recorded event history stored in a JSON file,
• replay_from_file_nde/0 - same as above, but uses a mismatched workflow implementation, which results in a nondeterministic replay error,
• replay_from_json/0 - executes a workflow, retrieves its history, and replays the execution using the retrieved history,
• create_json/0 - executes a workflow, retrieves its history, and saves it to a JSON file in the current working directory; the filename defaults to the workflow’s run_id.

Example run:

Elixir

iex(1)> ReplayTest.replay_from_file()
{:ok, {:completed, []}}
iex(2)> ReplayTest.replay_from_file_nde()
{:error, {:nondeterministic,
...
iex(3)> ReplayTest.replay_from_json()
{:ok, {:completed, []}}
iex(4)> ReplayTest.create_json()
{:ok, [%{attributes: {:workflow_execution_started_event_attributes,
...

Sample source: lib/replay_test

Erlang

1> replay_test:replay_from_file().
{ok,{completed,[]}}
2> replay_test:replay_from_file_nde().
{error, {nondeterministic,
...
3> replay_test:replay_from_json().
{ok,{completed,[]}}
4> replay_test:create_json().
{ok,[#{attributes => {workflow_execution_started_event_attributes,
...

Sample source: src/replay_test