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25 
26 package jdk.jfr.api.consumer;
27 
28 import jdk.jfr.Recording;
29 import jdk.jfr.consumer.RecordedEvent;
30 import jdk.jfr.consumer.RecordedThread;
31 import jdk.test.lib.Asserts;
32 import jdk.test.lib.jfr.Events;
33 import jdk.test.lib.jfr.SimpleEvent;
34 
35 /**
36  * @test
37  * @summary Tests that chunks are read in order and constant pools from multiple chunks can be read
38  * @key jfr
39  * @requires vm.hasJFR
40  * @library /test/lib
41  * @run main/othervm jdk.jfr.api.consumer.TestRecordingInternals
42  */
43 public class TestRecordingInternals {
44 
main(String[] args)45     public static void main(String[] args) throws Throwable {
46         try (Recording continuous = new Recording()) {
47             continuous.start();
48             for (int i = 0; i < 3; i++) {
49                 // Each new recording will create a new chunk
50                 // with a new set of constant pools, i.e.
51                 // constant pools for threads and thread groups
52                 createProfilingRecording(i);
53             }
54             continuous.stop();
55             int i = 0;
56             for (RecordedEvent e : Events.fromRecording(continuous)) {
57                 Integer id = e.getValue("id");
58                 RecordedThread rt = e.getThread();
59                 Asserts.assertEquals(id.toString(), rt.getJavaName(), "Thread name should match id");
60                 Asserts.assertEquals(id.toString(), rt.getThreadGroup().getName(), "Thread group name should match id");
61                 Asserts.assertEquals(id, Integer.valueOf(i), "Chunks out of order");
62                 i++;
63                 System.out.println(i + " OK ");
64             }
65         }
66     }
67 
createProfilingRecording(int id)68     private static void createProfilingRecording(int id) throws InterruptedException {
69         try (Recording r = new Recording()) {
70             r.start();
71             ThreadGroup tg = new ThreadGroup(String.valueOf(id));
72             Thread t = new Thread(tg, () -> {
73                 SimpleEvent event = new SimpleEvent();
74                 event.id = id;
75                 event.commit();
76             }, String.valueOf(id));
77             t.start();
78             t.join();
79             r.stop();
80         }
81     }
82 }
83