test/hotspot/jtreg/containers/docker/EventGeneratorLoop.java

*** 18,35 ****
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  import jdk.jfr.Event;
  import jdk.jfr.Description;
  import jdk.jfr.Label;
  
  
! // This class generates simple event in a loop
! // for a specified time.
! // Pass the time in seconds as a parameter.
  public class EventGeneratorLoop {
  
      @Label("SimpleEvent")
      @Description("Simple custom event")
      static class SimpleEvent extends Event {
--- 18,37 ----
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
+ 
+ import java.nio.file.Files;
+ import java.nio.file.Path;
+ import java.nio.file.Paths;
  import jdk.jfr.Event;
  import jdk.jfr.Description;
  import jdk.jfr.Label;
  
  
! // This class generates simple event in a loop for a specified time.
  public class EventGeneratorLoop {
  
      @Label("SimpleEvent")
      @Description("Simple custom event")
      static class SimpleEvent extends Event {
*** 39,60 ****
--- 41,75 ----
          @Label("Count")
          int count;
      }
  
  
+     // Arguments:
+     // - time to run (in seconds) - mandatory
+     // - full file path to signal the start of main - optional
      public static void main(String[] args) throws Exception {
          if ((args.length < 1) || (args[0] == null)) {
              throw new IllegalArgumentException("Expecting one argument: time to run (seconds)");
          }
          int howLong = Integer.parseInt(args[0]);
  
+         if ((args.length > 1) && (args[1] != null)) {
+             signalStartOfMain(args[1]);
+         }
+ 
          for (int i=0; i < howLong; i++) {
              SimpleEvent ev = new SimpleEvent();
              ev.msg = "Hello";
              ev.count = i;
              ev.commit();
  
              try { Thread.sleep(1000); } catch (InterruptedException e) {}
              System.out.print(".");
          }
      }
+ 
+     private static void signalStartOfMain(String fileName) throws Exception {
+         Path p = Paths.get(fileName);
+         Files.createFile(p);
+         p.toFile().deleteOnExit();
+ }
  }