public interface TaskManager
Note that on the client, timer behaviour is somewhat dependant on browser behaviour. For example, the HTML 4 specification mandates that delays or intervals less than 10ms are silently increased to 10ms; HTML 5 lowers this minimum to 4ms. In addition, browsers such as Firefox and Chrome enforce a minimum timeout to 1000ms for pages in inactive tabs.
Modifier and Type | Method and Description |
---|---|
void |
execute(Runnable task)
Schedules the given task for immediate execution, either on the calling
thread or on the first available worker thread.
|
void |
requestStop()
Prevents this task manager from beginning execution of all pending tasks.
|
AsyncTask |
schedule(TimeUnit unit,
int interval,
Runnable task)
Schedules the given task for execution at a later time.
|
AsyncTask |
scheduleRepeating(TimeUnit unit,
int interval,
Runnable task)
Schedules the given task for repeated execution at the given rate.
|
void execute(Runnable task)
task
- The task to execute.IllegalStateException
- if requestStop()
has been called on this TaskManager.AsyncTask scheduleRepeating(TimeUnit unit, int interval, Runnable task)
Efforts are made to ensure repeating tasks begin execution at fixed time intervals, rather than having a fixed delay between the end of execution and the beginning of the next. For example, when a task that takes about 2 seconds to run is scheduled for repeating execution every 10 seconds, it will begin execution every 10 seconds. There will be about 8 seconds between the end of one execution and the beginning of the next. However, if a task that takes 20 seconds is scheduled to run every 10 seconds, it will not be re-executed while it is still running. In this case (where a task takes longer to execute than the specified interval), the task will be rescheduled for immediate execution upon completion.
unit
- Specifies the units that interval
is interpreted in.interval
- Amount of time to wait before starting each successive execution.task
- The task to execute repeatedly.IllegalStateException
- if requestStop()
has been called on this TaskManager.AsyncTask schedule(TimeUnit unit, int interval, Runnable task)
unit
- Specifies the units that interval
is interpreted in.interval
- Amount of time to wait before starting each successive execution.task
- The task to execute repeatedly.IllegalStateException
- if requestStop()
has been called on this TaskManager.void requestStop()
Once this method has been called, any further method calls on this TaskManager will result in an IllegalStateException.
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