public enum TriggerResult extends Enum<TriggerResult>
If a Trigger
returns FIRE
or FIRE_AND_PURGE
but the window does not
contain any data the window function will not be invoked, i.e. no data will be produced for the
window.
Enum Constant and Description |
---|
CONTINUE
No action is taken on the window.
|
FIRE
On
FIRE , the window is evaluated and results are emitted. |
FIRE_AND_PURGE
FIRE_AND_PURGE evaluates the window function and emits the window result. |
PURGE
All elements in the window are cleared and the window is discarded, without evaluating the
window function or emitting any elements.
|
Modifier and Type | Method and Description |
---|---|
boolean |
isFire() |
boolean |
isPurge() |
static TriggerResult |
valueOf(String name)
Returns the enum constant of this type with the specified name.
|
static TriggerResult[] |
values()
Returns an array containing the constants of this enum type, in
the order they are declared.
|
public static final TriggerResult CONTINUE
public static final TriggerResult FIRE_AND_PURGE
FIRE_AND_PURGE
evaluates the window function and emits the window result.public static final TriggerResult FIRE
FIRE
, the window is evaluated and results are emitted. The window is not purged,
though, all elements are retained.public static final TriggerResult PURGE
public static TriggerResult[] values()
for (TriggerResult c : TriggerResult.values()) System.out.println(c);
public static TriggerResult valueOf(String name)
name
- the name of the enum constant to be returned.IllegalArgumentException
- if this enum type has no constant with the specified nameNullPointerException
- if the argument is nullpublic boolean isFire()
public boolean isPurge()
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