jruby/core/src/main/java/org/jruby/util/JRubyClassLoader.java at master · jruby/jruby · GitHub

History

253 lines (221 loc) · 9.25 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

**** 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 (SecurityException 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;

}

jruby/core/src/main/java/org/jruby/util/JRubyClassLoader.java at master · jruby/jruby · GitHub

Uh oh!

Uh oh!

jruby/core/src/main/java/org/jruby/util/JRubyClassLoader.java at master · jruby/jruby · GitHub

Uh oh!

Uh oh!

Expand file tree

Breadcrumbs

JRubyClassLoader.java

Latest commit

History

Breadcrumbs

JRubyClassLoader.java

File metadata and controls