How to set a Schedule-To-Start Timeout in Java
To set a Schedule-To-Start Timeout, use ActivityOptions.newBuilder.setScheduleToStartTimeout​.
- Type: Duration
- Default: Unlimited. This timeout is non-retryable.
You can set Activity Options using an ActivityStub within a Workflow implementation, or per-Activity using WorkflowImplementationOptions within a Worker.
Note that if you define options per-Activity Type options with WorkflowImplementationOptions.setActivityOptions(), setting them again specifically with ActivityStub in a Workflow will override this setting.
- With - ActivityStub- GreetingActivities activities = Workflow.newActivityStub(GreetingActivities.class,
 ActivityOptions.newBuilder()
 .setScheduleToStartTimeout(Duration.ofSeconds(5))
 // note that either StartToCloseTimeout or ScheduleToCloseTimeout are
 // required when setting Activity options.
 .setScheduletoCloseTimeout(Duration.ofSeconds(20))
 .build());
- With - WorkflowImplementationOptions- WorkflowImplementationOptions options =
 WorkflowImplementationOptions.newBuilder()
 .setActivityOptions(
 ImmutableMap.of(
 "GetCustomerGreeting",
 ActivityOptions.newBuilder()
 .setScheduleToStartTimeout(Duration.ofSeconds(5))
 .build()))
 .build();