Module jdk.jfr

Package jdk.jfr

Annotation Interface BooleanFlag

@Retention(RUNTIME)
@Target({FIELD,TYPE,METHOD})
public @interface BooleanFlag

Event field annotation, specifies that the value is a boolean flag, a true or false value.

The following example shows how the BooleanFlag annotation can be used to describe that a setting is a boolean value. This information can be used by a graphical user interface to display the setting as a checkbox.

@BooleanFlag
@Name("example.Rollback")
@Label("Rollback")
@Description("Include transactions that are rollbacked")
public static class RollbackSetting extends SettingControl {
    private boolean value = true;

    @Override
    public String combine(Set<String> values) {
        return values.contains("true") ? "true" : "false";
    }

    @Override
    public void setValue(String settingValue) {
        value = "true".equals(settingValue);
    }

    @Override
    public String getValue() {
        return Boolean.toString(value);
    }

    public boolean shouldEmit() {
        return value;
    }
}

@Name("example.Transaction")
public static class TransactionEvent extends Event {
    @Label("Context")
    String context;

    @Label("Rollback")
    boolean rollback;

    @SettingDefinition
    @Name("rollback")
    public boolean rollback(RollbackSetting rollbackSetting) {
        return rollback && rollbackSetting.shouldEmit();
    }
}

Since:

9