8226511: Implement JFR Event Streaming
Reviewed-by: egahlin, mseledtsov, mgronlun
Contributed-by: erik.gahlin@oracle.com, mikhailo.seledtsov@oracle.com, markus.gronlund@oracle.com
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package jdk.jfr.jcmd;
import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;
import jdk.jfr.Configuration;
import jdk.jfr.Recording;
import jdk.test.lib.jfr.FileHelper;
import jdk.test.lib.process.OutputAnalyzer;
/**
* @test
* @summary The test verifies JFR.dump command
* @key jfr
* @requires vm.hasJFR
* @library /test/lib /test/jdk
* @run main/othervm jdk.jfr.jcmd.TestJcmdDumpGeneratedFilename
*/
public class TestJcmdDumpGeneratedFilename {
public static void main(String[] args) throws Exception {
// Increase the id for a recording
for (int i = 0; i < 300; i++) {
new Recording();
}
try (Recording r = new Recording(Configuration.getConfiguration("default"))) {
r.start();
r.stop();
testDumpFilename();
testDumpFilename(r);
testDumpDiectory();
testDumpDiectory(r);
}
}
private static void testDumpFilename() throws Exception {
OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump");
verifyFile(readFilename(output), null);
}
private static void testDumpFilename(Recording r) throws Exception {
OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "name=" + r.getId());
verifyFile(readFilename(output), r.getId());
}
private static void testDumpDiectory() throws Exception {
Path directory = Paths.get(".").toAbsolutePath().normalize();
OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + directory);
String filename = readFilename(output);
verifyFile(filename, null);
verifyDirectory(filename, directory);
}
private static void testDumpDiectory(Recording r) throws Exception {
Path directory = Paths.get(".").toAbsolutePath().normalize();
OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "name=" + r.getId(), "filename=" + directory);
String filename = readFilename(output);
verifyFile(filename, r.getId());
verifyDirectory(filename, directory);
}
private static void verifyDirectory(String filename, Path directory) throws Exception {
if (!filename.contains(directory.toAbsolutePath().normalize().toString())) {
throw new Exception("Expected dump to be at " + directory);
}
}
private static void verifyFile(String filename, Long id) throws Exception {
String idText = id == null ? "" : "-id-" + Long.toString(id);
String expectedName = "hotspot-pid-" + ProcessHandle.current().pid() + idText;
if (!filename.contains(expectedName)) {
throw new Exception("Expected filename to contain " + expectedName);
}
FileHelper.verifyRecording(new File(filename));
}
private static String readFilename(OutputAnalyzer output) throws Exception {
Iterator<String> it = output.asLines().iterator();
while (it.hasNext()) {
String line = it.next();
if (line.contains("written to")) {
line = it.next(); // blank line
return it.next();
}
}
throw new Exception("Could not find filename of dumped recording.");
}
}