These samples show basic workflow and activity features.

To run, first see README.md for prerequisites. Then, run the following from the root directory to run the hello_activity.py sample:

uv run hello/hello_activity.py

The result will be:

Replace hello/hello_activity.py in the command with any other example filename (with the hello/ prefix) to run it instead.

Samples

• hello_activity - Execute an activity from a workflow.
• hello_activity_async - Execute an async activity from a workflow.
• hello_activity_choice - Execute certain activities inside a workflow based on dynamic input.
• hello_activity_method - Demonstrate an activity that is an instance method on a class and can access class state.
• hello_activity_heartbeat - Demonstrate usage of heartbeat timeouts.
• hello_activity_multiprocess - Execute a synchronous activity on a process pool.
• hello_activity_retry - Demonstrate activity retry by failing until a certain number of attempts.
• hello_async_activity_completion - Complete an activity outside of the function that was called.
• hello_cancellation - Manually react to cancellation inside workflows and activities.
• hello_change_log_level - Change the level of workflow task failure from WARN to ERROR.
• hello_child_workflow - Execute a child workflow from a workflow.
• hello_continue_as_new - Use continue as new to restart a workflow.
• hello_cron - Execute a workflow once a minute.
• hello_exception - Execute an activity that raises an error out of the workflow and out of the program.
• hello_local_activity - Execute a local activity from a workflow.
• hello_mtls - Accept URL, namespace, and certificate info as CLI args and use mTLS for connecting to server.
• hello_parallel_activity - Execute multiple activities at once.
• hello_patch - Demonstrates how to patch executions.
• hello_query - Invoke queries on a workflow.
• hello_search_attributes - Start workflow with search attributes then change while running.
• hello_signal - Send signals to a workflow.
• hello_update - Send a request to and a response from a client to a workflow execution.

Note: To enable the workflow update, set the frontend.enableUpdateWorkflowExecution dynamic config value to true.

temporal server start-dev --dynamic-config-value frontend.enableUpdateWorkflowExecution=true