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25 
26 package jdk.jfr.api.event;
27 
28 import java.util.ArrayList;
29 import java.util.Collections;
30 import java.util.List;
31 
32 import jdk.jfr.AnnotationElement;
33 import jdk.jfr.EventFactory;
34 import jdk.jfr.EventType;
35 import jdk.jfr.FlightRecorder;
36 import jdk.jfr.Registered;
37 import jdk.test.lib.Asserts;
38 
39 
40 /**
41  * @test
42  * @summary EventFactory register/unregister API test
43  * @key jfr
44  * @requires vm.hasJFR
45  * @library /test/lib
46  * @run main/othervm jdk.jfr.api.event.TestEventFactoryRegistration
47  */
48 public class TestEventFactoryRegistration {
49 
main(String[] args)50     public static void main(String[] args) throws Exception {
51         // Create an unregistered event
52         List<AnnotationElement> annotations = new ArrayList<>();
53         annotations.add(new AnnotationElement(Registered.class, false));
54         EventFactory factory = EventFactory.create(annotations, Collections.emptyList());
55 
56         try {
57             factory.getEventType();
58             Asserts.fail("Should not be able to get event type from an unregistered event");
59         } catch(IllegalStateException ise) {
60             // OK as expected
61         }
62 
63         // Now, register the event
64         factory.register();
65         EventType eventType = factory.getEventType();
66         verifyRegistered(factory.getEventType());
67 
68 
69         // Now, unregister the event
70         factory.unregister();
71 
72         verifyUnregistered(eventType);
73 
74         // Create a registered event
75         factory = EventFactory.create(Collections.emptyList(), Collections.emptyList());
76 
77         eventType = factory.getEventType();
78         Asserts.assertNotNull(eventType);
79 
80         verifyRegistered(eventType);
81 
82     }
83 
verifyUnregistered(EventType eventType)84     private static void verifyUnregistered(EventType eventType) {
85         // Verify the event is not registered
86         for (EventType type : FlightRecorder.getFlightRecorder().getEventTypes()) {
87             if (eventType.getId() == type.getId()) {
88                 Asserts.fail("Event is not unregistered");
89             }
90         }
91     }
92 
verifyRegistered(EventType eventType)93     private static void verifyRegistered(EventType eventType) {
94         // Verify  the event is registered
95         boolean found = false;
96         for (EventType type : FlightRecorder.getFlightRecorder().getEventTypes()) {
97             if (eventType.getId() == type.getId()) {
98                 found = true;
99             }
100         }
101         if(!found) {
102             Asserts.fail("Event not registered");
103         }
104     }
105 
106 }
107