executor

type Cache interface {
	Store(ctx context.Context, instance *core.WorkflowInstance, workflow WorkflowExecutor) error
	Evict(ctx context.Context, instance *core.WorkflowInstance) error
	Get(ctx context.Context, instance *core.WorkflowInstance) (WorkflowExecutor, bool, error)
	StartEviction(ctx context.Context)
}

type ExecutionResult struct {
	// New state of the workflow instance
	State core.WorkflowInstanceState

	// Events executed during the tastk execution
	Executed []*history.Event

	// Activities that were scheduled
	ActivityEvents []*history.Event

	// Timers that were scheduled
	TimerEvents []*history.Event

	// Events for other workflow instances
	WorkflowEvents []*history.WorkflowEvent
}

type WorkflowExecutor interface {
	ExecuteTask(ctx context.Context, t *backend.WorkflowTask) (*ExecutionResult, error)

	Close()
}

type WorkflowHistoryProvider interface {
	GetWorkflowInstanceHistory(ctx context.Context, instance *core.WorkflowInstance, lastSequenceID *int64) ([]*history.Event, error)
}