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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jmeter;
// N.B. this must only use standard Java packages
import java.io.File;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* Main class for JMeter - sets up initial classpath and the loader.
*/
public final class NewDriver {
private static final String CLASSPATH_SEPARATOR = File.pathSeparator;
private static final String OS_NAME = System.getProperty("os.name");// $NON-NLS-1$
private static final String OS_NAME_LC = OS_NAME.toLowerCase(java.util.Locale.ENGLISH);
private static final String JAVA_CLASS_PATH = "java.class.path";// $NON-NLS-1$
private static final String JMETER_LOGFILE_SYSTEM_PROPERTY = "jmeter.logfile";// $NON-NLS-1$
private static final String HEADLESS_MODE_PROPERTY = "java.awt.headless";// $NON-NLS-1$
/**
* The class loader to use for loading JMeter classes.
*/
private static final DynamicClassLoader loader;
/**
* The directory JMeter is installed in.
*/
private static final String JMETER_INSTALLATION_DIRECTORY;
private static final List EXCEPTIONS_IN_INIT = new ArrayList<>();
// 将当前类加载器设置为 loader ，解决由系统类加载器加载的 JMeter 无法动态加载 jar 包问题
public static void setContextClassLoader() {
Thread.currentThread().setContextClassLoader(loader);
}
public static void loaderClass(String name) {
try {
loader.loadClass(name);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
static {
final List jars = new ArrayList<>();
final String initiaClasspath = System.getProperty(JAVA_CLASS_PATH);
// Find JMeter home dir from the initial classpath
String tmpDir;
//只从 jmeter.home 加载
tmpDir = System.getProperty("jmeter.home", "");// Allow override $NON-NLS-1$ $NON-NLS-2$
if (tmpDir.length() == 0) {
File userDir = new File(System.getProperty("user.dir"));// $NON-NLS-1$
tmpDir = userDir.getAbsoluteFile().getParent();
}
if (tmpDir == null) {
tmpDir = System.getenv("JMETER_HOME");
}
JMETER_INSTALLATION_DIRECTORY = tmpDir;
/*
* Does the system support UNC paths? If so, may need to fix them up
* later
*/
boolean usesUNC = OS_NAME_LC.startsWith("windows");// $NON-NLS-1$
// Add standard jar locations to initial classpath
StringBuilder classpath = new StringBuilder();
File[] libDirs = new File[]{new File(JMETER_INSTALLATION_DIRECTORY + File.separator + "lib"),// $NON-NLS-1$ $NON-NLS-2$
new File(JMETER_INSTALLATION_DIRECTORY + File.separator + "lib" + File.separator + "ext"),// $NON-NLS-1$ $NON-NLS-2$
new File(JMETER_INSTALLATION_DIRECTORY + File.separator + "lib" + File.separator + "junit")};// $NON-NLS-1$ $NON-NLS-2$
for (File libDir : libDirs) {
File[] libJars = libDir.listFiles((dir, name) -> name.endsWith(".jar"));
if (libJars == null) {
new Throwable("Could not access " + libDir).printStackTrace(); // NOSONAR No logging here
continue;
}
Arrays.sort(libJars); // Bug 50708 Ensure predictable order of jars
for (File libJar : libJars) {
try {
String s = libJar.getPath();
// Fix path to allow the use of UNC URLs
if (usesUNC) {
if (s.startsWith("\\\\") && !s.startsWith("\\\\\\")) {// $NON-NLS-1$ $NON-NLS-2$
s = "\\\\" + s;// $NON-NLS-1$
} else if (s.startsWith("//") && !s.startsWith("///")) {// $NON-NLS-1$ $NON-NLS-2$
s = "//" + s;// $NON-NLS-1$
}
} // usesUNC
jars.add(new File(s).toURI().toURL());// See Java bug 4496398
classpath.append(CLASSPATH_SEPARATOR);
classpath.append(s);
} catch (MalformedURLException e) { // NOSONAR
EXCEPTIONS_IN_INIT.add(new Exception("Error adding jar:" + libJar.getAbsolutePath(), e));
}
}
}
// ClassFinder needs the classpath
System.setProperty(JAVA_CLASS_PATH, initiaClasspath + classpath.toString());
loader = createClassLoader(jars);
}
@SuppressWarnings("removal")
private static DynamicClassLoader createClassLoader(List jars) {
return java.security.AccessController.doPrivileged(
(java.security.PrivilegedAction) () ->
new DynamicClassLoader(jars.toArray(new URL[jars.size()]), Thread.currentThread().getContextClassLoader())
);
}
/**
* Prevent instantiation.
*/
private NewDriver() {
}
/**
* Generate an array of jar files located in a directory.
* Jar files located in sub directories will not be added.
*
* @param dir to search for the jar files.
*/
private static File[] listJars(File dir) {
if (dir.isDirectory()) {
return dir.listFiles((f, name) -> {
if (name.endsWith(".jar")) {// $NON-NLS-1$
File jar = new File(f, name);
return jar.isFile() && jar.canRead();
}
return false;
});
}
return new File[0];
}
/**
* Add a URL to the loader classpath only; does not update the system classpath.
*
* @param path to be added.
* @throws MalformedURLException when path points to an invalid url
*/
public static void addURL(String path) throws MalformedURLException {
File furl = new File(path);
loader.addURL(furl.toURI().toURL()); // See Java bug 4496398
File[] jars = listJars(furl);
for (File jar : jars) {
loader.addURL(jar.toURI().toURL()); // See Java bug 4496398
}
}
/**
* Add a URL to the loader classpath only; does not update the system
* classpath.
*
* @param url The {@link URL} to add to the classpath
*/
public static void addURL(URL url) {
loader.addURL(url);
}
/**
* Add a directory or jar to the loader and system classpaths.
*
* @param path to add to the loader and system classpath
* @throws MalformedURLException if path can not be transformed to a valid
* {@link URL}
*/
public static void addPath(String path) throws MalformedURLException {
File file = new File(path);
// Ensure that directory URLs end in "/"
if (file.isDirectory() && !path.endsWith("/")) {// $NON-NLS-1$
file = new File(path + "/");// $NON-NLS-1$
}
loader.addURL(file.toURI().toURL()); // See Java bug 4496398
StringBuilder sb = new StringBuilder(System.getProperty(JAVA_CLASS_PATH));
sb.append(CLASSPATH_SEPARATOR);
sb.append(path);
File[] jars = listJars(file);
for (File jar : jars) {
loader.addURL(jar.toURI().toURL()); // See Java bug 4496398
sb.append(CLASSPATH_SEPARATOR);
sb.append(jar.getPath());
}
// ClassFinder needs this
System.setProperty(JAVA_CLASS_PATH, sb.toString());
}
/**
* Get the directory where JMeter is installed. This is the absolute path
* name.
*
* @return the directory where JMeter is installed.
*/
public static String getJMeterDir() {
return JMETER_INSTALLATION_DIRECTORY;
}
/**
* The main program which actually runs JMeter.
*
* @param args the command line arguments
*/
public static void main(String[] args) {
if (!EXCEPTIONS_IN_INIT.isEmpty()) {
System.err.println("Configuration error during init, see exceptions:" + exceptionsToString(EXCEPTIONS_IN_INIT)); // NOSONAR Intentional System.err use
} else {
Thread.currentThread().setContextClassLoader(loader);
setLoggingProperties(args);
try {
// Only set property if it has not been set explicitely
if (System.getProperty(HEADLESS_MODE_PROPERTY) == null && shouldBeHeadless(args)) {
System.setProperty(HEADLESS_MODE_PROPERTY, "true");
}
Class initialClass = loader.loadClass("org.apache.jmeter.JMeter");// $NON-NLS-1$
Object instance = initialClass.getDeclaredConstructor().newInstance();
Method startup = initialClass.getMethod("start", new Class[]{new String[0].getClass()});// $NON-NLS-1$
startup.invoke(instance, new Object[]{args});
} catch (Throwable e) { // NOSONAR We want to log home directory in case of exception
e.printStackTrace(); // NOSONAR No logger at this step
System.err.println("JMeter home directory was detected as: " + JMETER_INSTALLATION_DIRECTORY); // NOSONAR Intentional System.err use
}
}
}
/**
* @param exceptionsInInit List of {@link Exception}
* @return String
*/
private static String exceptionsToString(List exceptionsInInit) {
StringBuilder builder = new StringBuilder();
for (Exception exception : exceptionsInInit) {
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
exception.printStackTrace(printWriter); // NOSONAR
builder.append(stringWriter.toString())
.append("\r\n");
}
return builder.toString();
}
/*
* Set logging related system properties.
*/
private static void setLoggingProperties(String[] args) {
String jmLogFile = getCommandLineArgument(args, 'j', "jmeterlogfile");// $NON-NLS-1$ $NON-NLS-2$
if (jmLogFile != null && !jmLogFile.isEmpty()) {
jmLogFile = replaceDateFormatInFileName(jmLogFile);
System.setProperty(JMETER_LOGFILE_SYSTEM_PROPERTY, jmLogFile);// $NON-NLS-1$
} else if (System.getProperty(JMETER_LOGFILE_SYSTEM_PROPERTY) == null) {// $NON-NLS-1$
System.setProperty(JMETER_LOGFILE_SYSTEM_PROPERTY, "jmeter.log");// $NON-NLS-1$ $NON-NLS-2$
}
String jmLogConf = getCommandLineArgument(args, 'i', "jmeterlogconf");// $NON-NLS-1$ $NON-NLS-2$
File logConfFile = null;
if (jmLogConf != null && !jmLogConf.isEmpty()) {
logConfFile = new File(jmLogConf);
} else if (System.getProperty("log4j.configurationFile") == null) {// $NON-NLS-1$
logConfFile = new File("log4j2.xml");// $NON-NLS-1$
if (!logConfFile.isFile()) {
logConfFile = new File(JMETER_INSTALLATION_DIRECTORY, "bin" + File.separator + "log4j2.xml");// $NON-NLS-1$ $NON-NLS-2$
}
}
if (logConfFile != null) {
System.setProperty("log4j.configurationFile", logConfFile.toURI().toString());// $NON-NLS-1$
}
}
private static boolean shouldBeHeadless(String[] args) {
for (String arg : args) {
if ("-n".equals(arg) || "-s".equals(arg) || "-g".equals(arg)) {
return true;
}
}
return false;
}
/*
* Find command line argument option value by the id and name.
*/
private static String getCommandLineArgument(String[] args, int id, String name) {
final String shortArgName = "-" + ((char) id);// $NON-NLS-1$
final String longArgName = "--" + name;// $NON-NLS-1$
String value = null;
for (int i = 0; i < args.length; i++) {
if ((shortArgName.equals(args[i]) && i < args.length - 1)
|| longArgName.equals(args[i])) {
if (!args[i + 1].startsWith("-")) {// $NON-NLS-1$
value = args[i + 1];
}
break;
} else if (!shortArgName.equals(args[i]) && args[i].startsWith(shortArgName)) {
value = args[i].substring(shortArgName.length());
break;
}
}
return value;
}
/*
* If the fileName contains at least one set of paired single-quotes, reformat using DateFormat
*/
private static String replaceDateFormatInFileName(String fileName) {
try {
StringBuilder builder = new StringBuilder();
final Instant date = Instant.now();
int fromIndex = 0;
int begin = fileName.indexOf('\'', fromIndex);// $NON-NLS-1$
int end;
String format;
DateTimeFormatter dateFormat;
while (begin != -1) {
builder.append(fileName.substring(fromIndex, begin));
fromIndex = begin + 1;
end = fileName.indexOf('\'', fromIndex);// $NON-NLS-1$
if (end == -1) {
throw new IllegalArgumentException("Invalid pairs of single-quotes in the file name: " + fileName);// $NON-NLS-1$
}
format = fileName.substring(begin + 1, end);
dateFormat = DateTimeFormatter.ofPattern(format).withZone(ZoneId.systemDefault());
builder.append(dateFormat.format(date));
fromIndex = end + 1;
begin = fileName.indexOf('\'', fromIndex);// $NON-NLS-1$
}
if (fromIndex < fileName.length() - 1) {
builder.append(fileName.substring(fromIndex));
}
return builder.toString();
} catch (Exception ex) {
System.err.println("Error replacing date format in file name:" + fileName + ", error:" + ex.getMessage()); // NOSONAR
}
return fileName;
}
}
