Package org.bukkit.scheduler

Interface BukkitScheduler

public interface BukkitScheduler

Method Summary

Modifier and Type	Method	Description
<T> Future<T>	callSyncMethod(Plugin plugin, Callable<T> task)	Calls a method on the main thread and returns a Future object.
void	cancelTask(int taskId)	Removes task from scheduler.
void	cancelTasks(Plugin plugin)	Removes all tasks associated with a particular plugin from the scheduler.
List<BukkitWorker>	getActiveWorkers()	Returns a list of all active workers.
List<BukkitTask>	getPendingTasks()	Returns a list of all pending tasks.
boolean	isCurrentlyRunning(int taskId)	Check if the task currently running.
boolean	isQueued(int taskId)	Check if the task queued to be run later.
BukkitTask	runTask(Plugin plugin, Runnable task)	Returns a task that will run on the next server tick.
void	runTask(Plugin plugin, Consumer<BukkitTask> task)	Returns a task that will run on the next server tick.
BukkitTask	runTask(Plugin plugin, BukkitRunnable task)	Deprecated. Use BukkitRunnable.runTask(Plugin)
BukkitTask	runTaskAsynchronously(Plugin plugin, Runnable task)	Asynchronous tasks should never access any API in Bukkit.
void	runTaskAsynchronously(Plugin plugin, Consumer<BukkitTask> task)	Asynchronous tasks should never access any API in Bukkit.
BukkitTask	runTaskAsynchronously(Plugin plugin, BukkitRunnable task)	Deprecated. Use BukkitRunnable.runTaskAsynchronously(Plugin)
BukkitTask	runTaskLater(Plugin plugin, Runnable task, long delay)	Returns a task that will run after the specified number of server ticks.
void	runTaskLater(Plugin plugin, Consumer<BukkitTask> task, long delay)	Returns a task that will run after the specified number of server ticks.
BukkitTask	runTaskLater(Plugin plugin, BukkitRunnable task, long delay)	Deprecated. Use BukkitRunnable.runTaskLater(Plugin, long)
BukkitTask	runTaskLaterAsynchronously(Plugin plugin, Runnable task, long delay)	Asynchronous tasks should never access any API in Bukkit.
void	runTaskLaterAsynchronously(Plugin plugin, Consumer<BukkitTask> task, long delay)	Asynchronous tasks should never access any API in Bukkit.
BukkitTask	runTaskLaterAsynchronously(Plugin plugin, BukkitRunnable task, long delay)	Deprecated. Use BukkitRunnable.runTaskLaterAsynchronously(Plugin, long)
BukkitTask	runTaskTimer(Plugin plugin, Runnable task, long delay, long period)	Returns a task that will repeatedly run until cancelled, starting after the specified number of server ticks.
void	runTaskTimer(Plugin plugin, Consumer<BukkitTask> task, long delay, long period)	Returns a task that will repeatedly run until cancelled, starting after the specified number of server ticks.
BukkitTask	runTaskTimer(Plugin plugin, BukkitRunnable task, long delay, long period)	Deprecated. Use BukkitRunnable.runTaskTimer(Plugin, long, long)
BukkitTask	runTaskTimerAsynchronously(Plugin plugin, Runnable task, long delay, long period)	Asynchronous tasks should never access any API in Bukkit.
void	runTaskTimerAsynchronously(Plugin plugin, Consumer<BukkitTask> task, long delay, long period)	Asynchronous tasks should never access any API in Bukkit.
BukkitTask	runTaskTimerAsynchronously(Plugin plugin, BukkitRunnable task, long delay, long period)	Deprecated. Use BukkitRunnable.runTaskTimerAsynchronously(Plugin, long, long)
int	scheduleAsyncDelayedTask(Plugin plugin, Runnable task)	Deprecated. This name is misleading, as it does not schedule "a sync" task, but rather, "an async" task
int	scheduleAsyncDelayedTask(Plugin plugin, Runnable task, long delay)	Deprecated. This name is misleading, as it does not schedule "a sync" task, but rather, "an async" task
int	scheduleAsyncRepeatingTask(Plugin plugin, Runnable task, long delay, long period)	Deprecated. This name is misleading, as it does not schedule "a sync" task, but rather, "an async" task
int	scheduleSyncDelayedTask(Plugin plugin, Runnable task)	Schedules a once off task to occur as soon as possible.
int	scheduleSyncDelayedTask(Plugin plugin, Runnable task, long delay)	Schedules a once off task to occur after a delay.
int	scheduleSyncDelayedTask(Plugin plugin, BukkitRunnable task)	Deprecated. Use BukkitRunnable.runTask(Plugin)
int	scheduleSyncDelayedTask(Plugin plugin, BukkitRunnable task, long delay)	Deprecated. Use BukkitRunnable.runTaskLater(Plugin, long)
int	scheduleSyncRepeatingTask(Plugin plugin, Runnable task, long delay, long period)	Schedules a repeating task.
int	scheduleSyncRepeatingTask(Plugin plugin, BukkitRunnable task, long delay, long period)	Deprecated. Use BukkitRunnable.runTaskTimer(Plugin, long, long)

Method Detail

scheduleSyncDelayedTask

int scheduleSyncDelayedTask(@NotNull
                            Plugin plugin,
                            @NotNull
                            Runnable task,
                            long delay)

Schedules a once off task to occur after a delay.

This task will be executed by the main server thread.

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

delay - Delay in server ticks before executing task

Returns:

Task id number (-1 if scheduling failed)

scheduleSyncDelayedTask

@Deprecated
int scheduleSyncDelayedTask(@NotNull
                            Plugin plugin,
                            @NotNull
                            BukkitRunnable task,
                            long delay)

Deprecated.

Use BukkitRunnable.runTaskLater(Plugin, long)

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

delay - Delay in server ticks before executing task

Returns:

Task id number (-1 if scheduling failed)

scheduleSyncDelayedTask

int scheduleSyncDelayedTask(@NotNull
                            Plugin plugin,
                            @NotNull
                            Runnable task)

Schedules a once off task to occur as soon as possible.

This task will be executed by the main server thread.

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

Returns:

Task id number (-1 if scheduling failed)

scheduleSyncDelayedTask

@Deprecated
int scheduleSyncDelayedTask(@NotNull
                            Plugin plugin,
                            @NotNull
                            BukkitRunnable task)

Deprecated.

Use BukkitRunnable.runTask(Plugin)

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

Returns:

Task id number (-1 if scheduling failed)

scheduleSyncRepeatingTask

int scheduleSyncRepeatingTask(@NotNull
                              Plugin plugin,
                              @NotNull
                              Runnable task,
                              long delay,
                              long period)

Schedules a repeating task.

This task will be executed by the main server thread.

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

delay - Delay in server ticks before executing first repeat

period - Period in server ticks of the task

Returns:

Task id number (-1 if scheduling failed)

scheduleSyncRepeatingTask

@Deprecated
int scheduleSyncRepeatingTask(@NotNull
                              Plugin plugin,
                              @NotNull
                              BukkitRunnable task,
                              long delay,
                              long period)

Deprecated.

Use BukkitRunnable.runTaskTimer(Plugin, long, long)

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

delay - Delay in server ticks before executing first repeat

period - Period in server ticks of the task

Returns:

Task id number (-1 if scheduling failed)

scheduleAsyncDelayedTask

@Deprecated
int scheduleAsyncDelayedTask(@NotNull
                             Plugin plugin,
                             @NotNull
                             Runnable task,
                             long delay)

Deprecated.

This name is misleading, as it does not schedule "a sync" task, but rather, "an async" task

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Schedules a once off task to occur after a delay. This task will be executed by a thread managed by the scheduler.

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

delay - Delay in server ticks before executing task

Returns:

Task id number (-1 if scheduling failed)

scheduleAsyncDelayedTask

@Deprecated
int scheduleAsyncDelayedTask(@NotNull
                             Plugin plugin,
                             @NotNull
                             Runnable task)

Deprecated.

This name is misleading, as it does not schedule "a sync" task, but rather, "an async" task

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Schedules a once off task to occur as soon as possible. This task will be executed by a thread managed by the scheduler.

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

Returns:

Task id number (-1 if scheduling failed)

scheduleAsyncRepeatingTask

@Deprecated
int scheduleAsyncRepeatingTask(@NotNull
                               Plugin plugin,
                               @NotNull
                               Runnable task,
                               long delay,
                               long period)

Deprecated.

This name is misleading, as it does not schedule "a sync" task, but rather, "an async" task

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Schedules a repeating task. This task will be executed by a thread managed by the scheduler.

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

delay - Delay in server ticks before executing first repeat

period - Period in server ticks of the task

Returns:

Task id number (-1 if scheduling failed)

callSyncMethod

@NotNull
<T> Future<T> callSyncMethod(@NotNull
                             Plugin plugin,
                             @NotNull
                             Callable<T> task)

Calls a method on the main thread and returns a Future object. This task will be executed by the main server thread.

• Note: The Future.get() methods must NOT be called from the main thread.
• Note2: There is at least an average of 10ms latency until the isDone() method returns true.

Type Parameters:

T - The callable's return type

Parameters:

plugin - Plugin that owns the task

task - Task to be executed

Returns:

Future Future object related to the task

cancelTask

void cancelTask(int taskId)

Removes task from scheduler.

Parameters:

taskId - Id number of task to be removed

cancelTasks

void cancelTasks(@NotNull
                 Plugin plugin)

Removes all tasks associated with a particular plugin from the scheduler.

Parameters:

plugin - Owner of tasks to be removed

isCurrentlyRunning

boolean isCurrentlyRunning(int taskId)

Check if the task currently running.

A repeating task might not be running currently, but will be running in the future. A task that has finished, and does not repeat, will not be running ever again.

Explicitly, a task is running if there exists a thread for it, and that thread is alive.

Parameters:

taskId - The task to check.

Returns:

If the task is currently running.

isQueued

boolean isQueued(int taskId)

Check if the task queued to be run later.

If a repeating task is currently running, it might not be queued now but could be in the future. A task that is not queued, and not running, will not be queued again.

Parameters:

taskId - The task to check.

Returns:

If the task is queued to be run.

getActiveWorkers

@NotNull
List<BukkitWorker> getActiveWorkers()

Returns a list of all active workers.

This list contains asynch tasks that are being executed by separate threads.

Returns:

Active workers

getPendingTasks

@NotNull
List<BukkitTask> getPendingTasks()

Returns a list of all pending tasks. The ordering of the tasks is not related to their order of execution.

Returns:

Active workers

runTask

@NotNull
BukkitTask runTask(@NotNull
                   Plugin plugin,
                   @NotNull
                   Runnable task)
            throws IllegalArgumentException

Returns a task that will run on the next server tick.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTask

void runTask(@NotNull
             Plugin plugin,
             @NotNull
             Consumer<BukkitTask> task)
      throws IllegalArgumentException

Returns a task that will run on the next server tick.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTask

@Deprecated
@NotNull
BukkitTask runTask(@NotNull
                   Plugin plugin,
                   @NotNull
                   BukkitRunnable task)
            throws IllegalArgumentException

Deprecated.

Use BukkitRunnable.runTask(Plugin)

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskAsynchronously

@NotNull
BukkitTask runTaskAsynchronously(@NotNull
                                 Plugin plugin,
                                 @NotNull
                                 Runnable task)
                          throws IllegalArgumentException

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Returns a task that will run asynchronously.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskAsynchronously

void runTaskAsynchronously(@NotNull
                           Plugin plugin,
                           @NotNull
                           Consumer<BukkitTask> task)
                    throws IllegalArgumentException

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Returns a task that will run asynchronously.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskAsynchronously

@Deprecated
@NotNull
BukkitTask runTaskAsynchronously(@NotNull
                                 Plugin plugin,
                                 @NotNull
                                 BukkitRunnable task)
                          throws IllegalArgumentException

Deprecated.

Use BukkitRunnable.runTaskAsynchronously(Plugin)

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskLater

@NotNull
BukkitTask runTaskLater(@NotNull
                        Plugin plugin,
                        @NotNull
                        Runnable task,
                        long delay)
                 throws IllegalArgumentException

Returns a task that will run after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskLater

void runTaskLater(@NotNull
                  Plugin plugin,
                  @NotNull
                  Consumer<BukkitTask> task,
                  long delay)
           throws IllegalArgumentException

Returns a task that will run after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskLater

@Deprecated
@NotNull
BukkitTask runTaskLater(@NotNull
                        Plugin plugin,
                        @NotNull
                        BukkitRunnable task,
                        long delay)
                 throws IllegalArgumentException

Deprecated.

Use BukkitRunnable.runTaskLater(Plugin, long)

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskLaterAsynchronously

@NotNull
BukkitTask runTaskLaterAsynchronously(@NotNull
                                      Plugin plugin,
                                      @NotNull
                                      Runnable task,
                                      long delay)
                               throws IllegalArgumentException

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Returns a task that will run asynchronously after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskLaterAsynchronously

void runTaskLaterAsynchronously(@NotNull
                                Plugin plugin,
                                @NotNull
                                Consumer<BukkitTask> task,
                                long delay)
                         throws IllegalArgumentException

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Returns a task that will run asynchronously after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskLaterAsynchronously

@Deprecated
@NotNull
BukkitTask runTaskLaterAsynchronously(@NotNull
                                      Plugin plugin,
                                      @NotNull
                                      BukkitRunnable task,
                                      long delay)
                               throws IllegalArgumentException

Deprecated.

Use BukkitRunnable.runTaskLaterAsynchronously(Plugin, long)

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskTimer

@NotNull
BukkitTask runTaskTimer(@NotNull
                        Plugin plugin,
                        @NotNull
                        Runnable task,
                        long delay,
                        long period)
                 throws IllegalArgumentException

Returns a task that will repeatedly run until cancelled, starting after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

period - the ticks to wait between runs

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskTimer

void runTaskTimer(@NotNull
                  Plugin plugin,
                  @NotNull
                  Consumer<BukkitTask> task,
                  long delay,
                  long period)
           throws IllegalArgumentException

Returns a task that will repeatedly run until cancelled, starting after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

period - the ticks to wait between runs

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskTimer

@Deprecated
@NotNull
BukkitTask runTaskTimer(@NotNull
                        Plugin plugin,
                        @NotNull
                        BukkitRunnable task,
                        long delay,
                        long period)
                 throws IllegalArgumentException

Deprecated.

Use BukkitRunnable.runTaskTimer(Plugin, long, long)

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task

period - the ticks to wait between runs

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskTimerAsynchronously

@NotNull
BukkitTask runTaskTimerAsynchronously(@NotNull
                                      Plugin plugin,
                                      @NotNull
                                      Runnable task,
                                      long delay,
                                      long period)
                               throws IllegalArgumentException

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Returns a task that will repeatedly run asynchronously until cancelled, starting after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task for the first time

period - the ticks to wait between runs

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskTimerAsynchronously

void runTaskTimerAsynchronously(@NotNull
                                Plugin plugin,
                                @NotNull
                                Consumer<BukkitTask> task,
                                long delay,
                                long period)
                         throws IllegalArgumentException

Asynchronous tasks should never access any API in Bukkit. Great care should be taken to assure the thread-safety of asynchronous tasks.

Returns a task that will repeatedly run asynchronously until cancelled, starting after the specified number of server ticks.

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task for the first time

period - the ticks to wait between runs

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null

runTaskTimerAsynchronously

@Deprecated
@NotNull
BukkitTask runTaskTimerAsynchronously(@NotNull
                                      Plugin plugin,
                                      @NotNull
                                      BukkitRunnable task,
                                      long delay,
                                      long period)
                               throws IllegalArgumentException

Deprecated.

Use BukkitRunnable.runTaskTimerAsynchronously(Plugin, long, long)

Parameters:

plugin - the reference to the plugin scheduling task

task - the task to be run

delay - the ticks to wait before running the task for the first time

period - the ticks to wait between runs

Returns:

a BukkitTask that contains the id number

Throws:

IllegalArgumentException - if plugin is null

IllegalArgumentException - if task is null