Package com.oracle.bmc.waiter

Interface WaiterScheduler

public interface WaiterScheduler

Abstraction for GenericWaiter to implement the “schedule” functionality to implement asynchronous waiting.

Basically a cut down version of ScheduledExecutorService, with only the ScheduledExecutorService.schedule(Runnable, long, TimeUnit) method.

Field Summary

Fields

Modifier and Type	Field	Description
static WaiterScheduler	SYNC	Scheduler implementation that blocks in the schedule(java.lang.Runnable, long, java.util.concurrent.TimeUnit) method for the given time to pass.
static WaiterScheduler	UNSUPPORTED	A WaiterScheduler where waiting is not supported.

Method Summary

Modifier and Type	Method	Description
static WaiterScheduler	fromService(ScheduledExecutorService service)	Create a new instance from the given ScheduledExecutorService.
Future<?>	schedule(Runnable command, long time, TimeUnit unit)

Field Detail

UNSUPPORTED

static final WaiterScheduler UNSUPPORTED

A WaiterScheduler where waiting is not supported.

Always throws an exception. GenericWaiter will still succeed if the wait delay is configured as 0, but not if it’s positive.

SYNC

static final WaiterScheduler SYNC

Scheduler implementation that blocks in the schedule(java.lang.Runnable, long, java.util.concurrent.TimeUnit) method for the given time to pass.

This removes the need for a separate threaded scheduler. GenericWaiter can handle the case where schedule(java.lang.Runnable, long, java.util.concurrent.TimeUnit) blocks, so this will not deadlock or anything.

Method Detail

fromService

static WaiterScheduler fromService(ScheduledExecutorService service)

Create a new instance from the given ScheduledExecutorService.

Tasks will be run on that executor.

schedule

Future<?> schedule(Runnable command,
                   long time,
                   TimeUnit unit)