/*
* Copyright ( c ) 2013 , 2022 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* 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.io.File;
import java.net.UnknownHostException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.util.Arrays;
import java.util.List;
import static jdk.test.lib.Asserts.*;
import jdk.test.lib.Utils;
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.thread .ProcessThread;
/**
* The base class for tests of jstatd .
*
* The test sequence for TestJstatdDefaults for example is :
* < pre >
* { @ code
* // start jstatd process
* jstatd - J - XX : + UsePerfData
*
* // run jps and verify its output
* jps - J - XX : + UsePerfData hostname
*
* // run jstat and verify its output
* jstat - J - XX : + UsePerfData - gcutil pid @ hostname 250 5
*
* // stop jstatd process and verify that no unexpected exceptions have been thrown
* }
* < / pre >
*/
public final class JstatdTest {
/**
* jstat gcutil option : takes JSTAT_GCUTIL_SAMPLES samples at
* JSTAT_GCUTIL_INTERVAL_MS millisecond intervals
*/
private static final int JSTAT_GCUTIL_SAMPLES = 5 ;
private static final int JSTAT_GCUTIL_INTERVAL_MS = 250 ;
private static final String JPS_OUTPUT_REGEX = "^\\d+\\s*.*" ;
private boolean useDefaultPort = true ;
private boolean useDefaultRmiPort = true ;
private String port;
private String rmiPort;
private String serverName;
private Long jstatdPid;
private boolean withExternalRegistry = false ;
private boolean useShortCommandSyntax = false ;
private volatile static boolean portInUse;
public void setServerName(String serverName) {
this .serverName = serverName;
}
public void setUseDefaultPort(boolean useDefaultPort) {
this .useDefaultPort = useDefaultPort;
}
public void setUseDefaultRmiPort(boolean useDefaultRmiPort) {
this .useDefaultRmiPort = useDefaultRmiPort;
}
public void setWithExternalRegistry(boolean withExternalRegistry) {
this .withExternalRegistry = withExternalRegistry;
}
private Long waitOnTool(ProcessThread thread ) throws Throwable {
long pid = thread .getPid();
if (portInUse) {
System.out.println("Port already in use. Trying to restart with a new one..." );
return null ;
}
System.out.println(thread .getName() + " pid: " + pid);
return pid;
}
private void log(String caption, String... cmd) {
System.out.println(Utils.NEW_LINE + caption + ":" );
System.out.println(Arrays.toString(cmd).replace("," , "" ));
}
private String getDestination() throws UnknownHostException {
String option = Utils.getHostname();
if (port != null ) {
option += ":" + port;
}
if (serverName != null ) {
option += "/" + serverName;
}
return option;
}
/**
* Depending on test settings command line can look like :
*
* jps - J - XX : + UsePerfData hostname
* jps - J - XX : + UsePerfData hostname : port
* jps - J - XX : + UsePerfData hostname / serverName
* jps - J - XX : + UsePerfData hostname : port / serverName
*/
private OutputAnalyzer runJps() throws Exception {
JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jps" );
launcher.addVMArg("-XX:+UsePerfData" );
launcher.addToolArg(getDestination());
String[] cmd = launcher.getCommand();
log("Start jps" , cmd);
ProcessBuilder processBuilder = new ProcessBuilder(cmd);
OutputAnalyzer output = ProcessTools.executeProcess(processBuilder);
System.out.println(output.getOutput());
return output;
}
/**
* Verifies output form jps contains pids and programs ' name information .
* The function will discard any lines that come before the first line with pid .
* This can happen if the JVM outputs a warning message for some reason
* before running jps .
*
* The output can look like :
* 35536 Jstatd
* 35417 Main
* 31103 org . eclipse . equinox . launcher_1 . 3 . 0 . v20120522 - 1813 . jar
*/
private void verifyJpsOutput(OutputAnalyzer output) throws Exception {
output.shouldHaveExitValue(0 );
assertFalse(output.getOutput().isEmpty(), "Output should not be empty" );
boolean foundFirstLineWithPid = false ;
List<String> lines = output.asLinesWithoutVMWarnings();
for (String line : lines) {
if (!foundFirstLineWithPid) {
foundFirstLineWithPid = line.matches(JPS_OUTPUT_REGEX);
continue ;
}
assertTrue(line.matches(JPS_OUTPUT_REGEX),
"Output does not match the pattern" + Utils.NEW_LINE + line);
}
assertTrue(foundFirstLineWithPid, "Invalid output" );
}
/**
* Depending on test settings command line can look like :
*
* jstat - J - XX : + UsePerfData - gcutil pid @ hostname 250 5
* jstat - J - XX : + UsePerfData - gcutil pid @ hostname : port 250 5
* jstat - J - XX : + UsePerfData - gcutil pid @ hostname / serverName 250 5
* jstat - J - XX : + UsePerfData - gcutil pid @ hostname : port / serverName 250 5
*/
private OutputAnalyzer runJstat() throws Exception {
JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jstat" );
launcher.addVMArg("-XX:+UsePerfData" );
launcher.addToolArg("-gcutil" );
launcher.addToolArg(jstatdPid + "@" + getDestination());
launcher.addToolArg(Integer.toString(JSTAT_GCUTIL_INTERVAL_MS));
launcher.addToolArg(Integer.toString(JSTAT_GCUTIL_SAMPLES));
String[] cmd = launcher.getCommand();
log("Start jstat" , cmd);
ProcessBuilder processBuilder = new ProcessBuilder(cmd);
OutputAnalyzer output = ProcessTools.executeProcess(processBuilder);
System.out.println(output.getOutput());
return output;
}
private void verifyJstatOutput(OutputAnalyzer output)
throws Exception {
output.shouldHaveExitValue(0 );
assertFalse(output.getOutput().isEmpty(), "Output should not be empty" );
JstatGCUtilParser gcUtilParser = new JstatGCUtilParser(
output.getOutput());
gcUtilParser.parse(JSTAT_GCUTIL_SAMPLES);
}
private void runToolsAndVerify() throws Exception {
OutputAnalyzer output = runJps();
verifyJpsOutput(output);
output = runJstat();
verifyJstatOutput(output);
}
private Registry startRegistry()
throws InterruptedException, RemoteException {
Registry registry = null ;
try {
System.out.println("Start rmiregistry on port " + port);
registry = LocateRegistry
.createRegistry(Integer.parseInt(port));
} catch (RemoteException e) {
if (e.getMessage().contains("Port already in use" )) {
System.out.println("Port already in use. Trying to restart with a new one..." );
Thread .sleep(100 );
return null ;
} else {
throw e;
}
}
return registry;
}
private void cleanUpThread(ProcessThread thread ) throws Throwable {
if (thread != null ) {
thread .stopProcess();
thread .joinAndThrow();
}
}
/**
* Depending on test settings command line can look like :
*
* jstatd - J - XX : + UsePerfData
* jstatd - J - XX : + UsePerfData - p port
* jstatd - J - XX : + UsePerfData - p port - r rmiport
* jstatd - J - XX : + UsePerfData - n serverName
* jstatd - J - XX : + UsePerfData - p port - n serverName
*/
private String[] getJstatdCmd() throws Exception {
JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jstatd" );
launcher.addVMArgs(Utils.getTestJavaOpts());
launcher.addVMArg("-XX:+UsePerfData" );
String testSrc = System.getProperty("test.src" );
if (port != null ) {
addToolArg(launcher,"-p" , port);
}
if (rmiPort != null ) {
addToolArg(launcher,"-r" , rmiPort);
}
if (serverName != null ) {
addToolArg(launcher,"-n" , serverName);
}
if (withExternalRegistry) {
launcher.addToolArg("-nr" );
}
String[] cmd = launcher.getCommand();
log("Start jstatd" , cmd);
return cmd;
}
private void addToolArg(JDKToolLauncher launcher, String name, String value) {
if (useShortCommandSyntax) {
launcher.addToolArg(name + value);
} else {
launcher.addToolArg(name);
launcher.addToolArg(value);
}
}
private ProcessThread tryToSetupJstatdProcess() throws Throwable {
portInUse = false ;
ProcessThread jstatdThread = new ProcessThread("Jstatd-Thread" ,
JstatdTest::isJstadReady, getJstatdCmd());
try {
jstatdThread.start();
// Make sure jstatd is up and running
jstatdPid = waitOnTool(jstatdThread);
if (jstatdPid == null ) {
// The port is already in use. Cancel and try with new one.
jstatdThread.stopProcess();
jstatdThread.join();
return null ;
}
} catch (Throwable t) {
// Something went wrong in the product - clean up!
cleanUpThread(jstatdThread);
throw t;
}
return jstatdThread;
}
private static boolean isJstadReady(String line) {
if (line.contains("Port already in use" )) {
portInUse = true ;
return true ;
}
return line.startsWith("jstatd started (bound to " );
}
public void doTest() throws Throwable {
runTest(false );
runTest(true );
}
private void runTest(boolean useShortSyntax) throws Throwable {
useShortCommandSyntax = useShortSyntax;
if (useDefaultPort) {
verifyNoRmiRegistryOnDefaultPort();
}
ProcessThread jstatdThread = null ;
try {
while (jstatdThread == null ) {
if (!useDefaultPort) {
port = String.valueOf(Utils.getFreePort());
}
if (!useDefaultRmiPort) {
rmiPort = String.valueOf(Utils.getFreePort());
}
if (withExternalRegistry) {
Registry registry = startRegistry();
if (registry == null ) {
// The port is already in use. Cancel and try with a new one.
continue ;
}
}
jstatdThread = tryToSetupJstatdProcess();
}
runToolsAndVerify();
} finally {
cleanUpThread(jstatdThread);
}
// Verify output from jstatd
OutputAnalyzer output = jstatdThread.getOutput();
output.shouldBeEmptyIgnoreVMWarnings();
assertNotEquals(output.getExitValue(), 0 ,
"jstatd process exited with unexpected exit code" );
}
private void verifyNoRmiRegistryOnDefaultPort() throws Exception {
try {
Registry registry = LocateRegistry.getRegistry();
registry.list();
throw new Exception("There is already RMI registry on the default port: " + registry);
} catch (RemoteException e) {
// No RMI registry on default port is detected
}
}
}
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