Package arez

Class Task.Flags

java.lang.Object

arez.Task.Flags

Enclosing class:

Task

public static final class Task.Flags
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DISPOSE_ON_COMPLETE	The flag that specifies that the task should be disposed after it has completed execution.
static final int	NO_WRAP_TASK	The flag that indicates that task should not be wrapped.
static final int	PRIORITY_HIGH	High priority.
static final int	PRIORITY_HIGHEST	Highest priority.
static final int	PRIORITY_LOW	Low priority.
static final int	PRIORITY_LOWEST	Lowest priority.
static final int	PRIORITY_NORMAL	Normal priority if no other priority otherwise specified.
static final int	RUN_LATER	The scheduler will not be triggered when the task is created.
static final int	RUN_NOW	The scheduler will be triggered when the task is created to immediately invoke the task.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

PRIORITY_HIGHEST

public static final int PRIORITY_HIGHEST

Highest priority. This priority should be used when the task will dispose or release other reactive elements (and thus remove elements from being scheduled).

Only one of the PRIORITY_* flags should be applied to a task.

See Also:

• Priority.HIGHEST
• Priority.HIGHEST
• Constant Field Values

PRIORITY_HIGH

public static final int PRIORITY_HIGH

High priority. To reduce the chance that downstream elements will react multiple times within a single reaction round, this priority should be used when the task may trigger many downstream tasks.

Only one of the PRIORITY_* flags should be applied to a task.

See Also:

• Priority.HIGH
• Priority.HIGH
• Constant Field Values

PRIORITY_NORMAL

public static final int PRIORITY_NORMAL

Normal priority if no other priority otherwise specified.

Only one of the PRIORITY_* flags should be applied to a task.

See Also:

• Priority.NORMAL
• Priority.NORMAL
• Constant Field Values

PRIORITY_LOW

public static final int PRIORITY_LOW

Low priority. Usually used to schedule tasks that reflect state onto non-reactive application components. i.e. Tasks that are used to build html views, perform network operations etc. These reactions are often at low priority to avoid recalculation of dependencies (i.e. ComputableValues) triggering this reaction multiple times within a single reaction round.

Only one of the PRIORITY_* flags should be applied to a task.

See Also:

• Priority.LOW
• Priority.LOW
• Constant Field Values

PRIORITY_LOWEST

public static final int PRIORITY_LOWEST

Lowest priority. Use this priority if the task is a ComputableValue that may be unobserved when a PRIORITY_LOW observer reacts. This is used to avoid recomputing state that is likely to either be unobserved or recomputed as part of another observers reaction.

Only one of the PRIORITY_* flags should be applied to a task.

See Also:

• Priority.LOWEST
• Priority.LOWEST
• Constant Field Values

RUN_NOW

public static final int RUN_NOW

The scheduler will be triggered when the task is created to immediately invoke the task. This should not be specified if RUN_LATER is specified.

See Also:

• Constant Field Values

RUN_LATER

public static final int RUN_LATER

The scheduler will not be triggered when the task is created. The application is responsible for ensuring thatthe ArezContext.triggerScheduler() method is invoked at a later time. This should not be specified if RUN_NOW is specified.

See Also:

• Constant Field Values

NO_WRAP_TASK

public static final int NO_WRAP_TASK

The flag that indicates that task should not be wrapped. The wrapping is responsible for ensuring the task never generates an exception and for generating the spy events. If wrapping is disabled it is expected that the caller is responsible for integrating with the spy subsystem and catching exceptions if any.

See Also:

• Constant Field Values

DISPOSE_ON_COMPLETE

public static final int DISPOSE_ON_COMPLETE

The flag that specifies that the task should be disposed after it has completed execution.

See Also:

• Constant Field Values