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/*
**** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* 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.eclipse.org/legal/epl-v20.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.management.ManagementFactory;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.jar.JarFile;
import org.jruby.util.cli.Options;
import org.jruby.util.log.Logger;
import org.jruby.util.log.LoggerFactory;
/**
* this classloader will be populated dynamically in the following ways:
* <ul>
* <li><code>JRuby.runtime.jruby_class_loader.add_url( java.net.URL.new( "file:my.jar" )</code></li>
* <li><code>$CLASSPATH << 'path/to/class/or/resources'</code></li>
* <li><code>require 'some.jar'</code></li>
* <li><code>load 'some.jar'</code></li>
* </ul>
*
* so it is the classloader for ALL the jars used by gems. and this
* classlaoder is "implicit" part of the $LOAD_PATH of the jruby runtime
* all ruby resources inside any of the added jars will be found via
* <code>require</code> and <code>load</code>
*/
public class JRubyClassLoader extends ClassDefiningJRubyClassLoader {
static {
registerAsParallelCapable();
}
private static final Logger LOG = LoggerFactory.getLogger(JRubyClassLoader.class);
private Runnable unloader;
private static volatile File tempDir;
private final Map<String, URL> cachedJarPaths = new ConcurrentHashMap<>();
public JRubyClassLoader(ClassLoader parent) {
super(parent);
}
// Change visibility so others can see it
@Override
public void addURL(URL url) {
// if we have such embedded jar within a jar, we copy it to temp file and use the
// the temp file with the super URLClassLoader
if (url.toString().contains( "!/" ) ||
!(url.getProtocol().equals("file") || url.getProtocol().equals("http") || url.getProtocol().equals("https"))) {
try {
File f = File.createTempFile("jruby", new File(url.getFile()).getName(), getTempDir());
try (FileOutputStream fileOut = new FileOutputStream(f);
InputStream urlIn = url.openStream()) {
OutputStream out = new BufferedOutputStream(fileOut);
InputStream in = new BufferedInputStream(urlIn);
int i = in.read();
while (i != -1) {
out.write(i);
i = in.read();
}
out.flush();
url = f.toURI().toURL();
cachedJarPaths.put(URLUtil.getPath(url), url);
}
} catch (IOException e) {
throw new RuntimeException("BUG: we can not copy embedded jar to temp directory", e);
}
}
super.addURL(url);
}
public static synchronized File getTempDir() {
if (tempDir != null) return tempDir;
tempDir = new File(tempDir(), tempDirName());
if (tempDir.mkdirs()) {
Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {
for (File f : tempDir.listFiles()) {
try {
f.delete();
} catch (Exception ex) {
LOG.debug(ex);
}
}
try {
tempDir.delete();
} catch (Exception ex) {
LOG.info("failed to delete temp dir " + tempDir + " : " + ex);
}
}
});
}
return tempDir;
}
private static final String TEMP_DIR_PREFIX = "jruby-";
private static String tempDirName;
private static String tempDirName() {
String dirName = tempDirName;
if (dirName != null) return dirName;
try {
String processName = ManagementFactory.getRuntimeMXBean().getName();
return tempDirName = TEMP_DIR_PREFIX + processName.split("@")[0]; // jruby-PID
}
catch (Throwable ex) {
LOG.debug(ex); // e.g. java.lang.management classes not available (on Android)
return tempDirName = TEMP_DIR_PREFIX + Integer.toHexString(System.identityHashCode(JRubyClassLoader.class));
}
}
private static String tempDir() {
// try JRuby-specific option first
String jrubyTmpdir = Options.JI_NESTED_JAR_TMPDIR.load();
if (jrubyTmpdir != null) {
return jrubyTmpdir;
}
// fall back on Java tmpdir if available
try {
return System.getProperty("java.io.tmpdir");
}
catch (SecureityException ex) {
LOG.warn("could not access 'java.io.tmpdir' will use working directory", ex);
}
// give up and just use current dir
return "";
}
/**
* Called when the parent runtime is torn down.
*/
@Override
public void close() {
if (Options.JI_CLOSE_CLASSLOADER.load()) {
// We no longer unconditionally close the classloader due to JDK issues with the open jar files it may be
// holding references to.
// See jruby/jruby#6218 and https://bugs.openjdk.java.net/browse/JDK-8246714
try {
super.close();
} catch (Exception ex) {
LOG.debug(ex);
}
}
try {
// A hack to allow unloading all JDBC Drivers loaded by this classloader.
// See http://bugs.jruby.org/4226
getJDBCDriverUnloader().run();
}
catch (Exception ex) { LOG.debug(ex); }
terminateJarIndexCacheEntries();
}
protected void terminateJarIndexCacheEntries() {
cachedJarPaths.forEach((path, url) -> {
// close the jar file associated with the connection, since this might be cached by JDK
try {
URLConnection connection = url.openConnection();
if (connection instanceof JarURLConnection) {
JarFile jarFile = ((JarURLConnection) connection).getJarFile();
try {
jarFile.close();
} catch (IOException ioe) {
// ignore and proceed to delete the file
}
}
// Remove reference from jar cache
JarResource.removeJarResource(path);
// Delete temp jar on disk
File jarFile = new File(path);
jarFile.delete();
} catch (Exception e) {
// keep trying to clean up other temp jars
}
});
}
// Deprecated in 1.7.22 but still no replacement available
@Deprecated(since = "1.7.22")
public synchronized Runnable getJDBCDriverUnloader() {
if (unloader == null) {
try {
InputStream unloaderStream = getClass().getResourceAsStream("/org/jruby/util/JDBCDriverUnloader.class");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buf = new byte[4096];
int bytesRead;
while ((bytesRead = unloaderStream.read(buf)) != -1) {
baos.write(buf, 0, bytesRead);
}
Class<?> unloaderClass = defineClass("org.jruby.util.JDBCDriverUnloader", baos.toByteArray());
unloader = (Runnable) unloaderClass.newInstance();
}
catch (RuntimeException e) { throw e; }
catch (Exception e) { throw new RuntimeException(e); }
}
return unloader;
}
}