WF workflow persistence-workflow state persistence (source data collection test)

Configure the persistence service (step 3 ):

1. Create and configure a Persistent Database

2. Add the sqlstatepersistanceservice instance object to the workflow runtime;

3. Save the workflow instance status.

There are two ways to add the workflow persistence service to workflow running:

1. Write Code directly to add the persistence service;

2. Write an entry address in the configuration file to add the persistent service.

There are two ways to persist a workflow to the media:

1. When a workflow instance enters an idle status, the instance status is persistent;
2. Force Persistence: Call the instance's unload method;

There are two ways to restore persistent data from a persistent medium:

1. Restore a workflow instance when the engine reaches an idle;

2. Call the load method of the workflow instance.