@Target(TYPE) @Retention(RUNTIME) @Inherited public @interface Enabled
If an event doesn't have the annotation, then by default the event is enabled.
The following example shows how the Enabled annotation can be used to create a disabled event. A disabled event will at most have the overhead of an allocation, or none if the runtime JIT compiler is able to eliminate it.
@Name("StopWatch")
@Label("Stop Watch")
@Category("Debugging")
@StackTrace(false)
@Enabled(false)
static public class StopWatchEvent extends Event {
}
public void update() {
StopWatchEvent e = new StopWatchEvent();
e.begin();
...
e.commit();
}
java -XX:StartFlightRecording:StopWatch#enabled=true ...
| Modifier and Type | Optional Element | Description |
|---|---|---|
boolean |
value |
Returns true if by default the event should be enabled, false otherwise. |
| Modifier and Type | Field | Description |
|---|---|---|
static final String |
NAME |
Setting name "enabled", signifies that the event should be recorded. |
static final String NAME
"enabled", signifies that the event should be recorded.boolean value
true if by default the event should be enabled, false otherwise.true if by default the event should be enabled by default, false otherwisetrue
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/jdk.jfr/jdk/jfr/Enabled.html