--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/src/jdk/nashorn/internal/runtime/CodeStore.java Wed Apr 02 18:26:57 2014 +0200
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2010, 2014, 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. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package jdk.nashorn.internal.runtime;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Base64;
+import java.util.Map;
+
+/**
+ * A code cache for persistent caching of compiled scripts.
+ */
+final class CodeStore {
+
+ private final File dir;
+ private final int minSize;
+
+ // Message digest to file name encoder
+ private final static Base64.Encoder BASE64 = Base64.getUrlEncoder().withoutPadding();
+
+ // Default minimum size for storing a compiled script class
+ private final static int DEFAULT_MIN_SIZE = 1000;
+
+ /**
+ * Constructor
+ * @param path directory to store code in
+ * @throws IOException
+ */
+ public CodeStore(final String path) throws IOException {
+ this(path, DEFAULT_MIN_SIZE);
+ }
+
+ /**
+ * Constructor
+ * @param path directory to store code in
+ * @param minSize minimum file size for caching scripts
+ * @throws IOException
+ */
+ public CodeStore(final String path, final int minSize) throws IOException {
+ this.dir = new File(path);
+ this.minSize = minSize;
+ checkDirectory(this.dir);
+ }
+
+ private static void checkDirectory(final File dir) throws IOException {
+ try {
+ AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
+ @Override
+ public Void run() throws IOException {
+ if (!dir.exists() && !dir.mkdirs()) {
+ throw new IOException("Could not create directory: " + dir);
+ } else if (!dir.isDirectory()) {
+ throw new IOException("Not a directory: " + dir);
+ } else if (!dir.canRead() || !dir.canWrite()) {
+ throw new IOException("Directory not readable or writable: " + dir);
+ }
+ return null;
+ }
+ });
+ } catch (PrivilegedActionException e) {
+ throw (IOException) e.getException();
+ }
+ }
+
+ /**
+ * Return a compiled script from the cache, or null if it isn't found.
+ *
+ * @param source the source
+ * @return the compiled script or null
+ * @throws IOException
+ * @throws ClassNotFoundException
+ */
+ public CompiledScript getScript(final Source source) throws IOException, ClassNotFoundException {
+ if (source.getLength() < minSize) {
+ return null;
+ }
+
+ final String digest = BASE64.encodeToString(source.getDigest());
+ final File file = new File(dir, digest);
+
+ try {
+ return AccessController.doPrivileged(new PrivilegedExceptionAction<CompiledScript>() {
+ @Override
+ public CompiledScript run() throws IOException, ClassNotFoundException {
+ if (!file.exists()) {
+ return null;
+ }
+ try (ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(new FileInputStream(file)))) {
+ CompiledScript compiledScript = (CompiledScript) in.readObject();
+ compiledScript.setSource(source);
+ return compiledScript;
+ }
+ }
+ });
+ } catch (PrivilegedActionException e) {
+ final Exception ex = e.getException();
+ if (ex instanceof IOException) {
+ throw (IOException) ex;
+ } else if (ex instanceof ClassNotFoundException) {
+ throw (ClassNotFoundException) ex;
+ }
+ throw (new RuntimeException(ex));
+ }
+ }
+
+ /**
+ * Store a compiled script in the cache.
+ *
+ * @param source the source
+ * @param mainClassName the main class name
+ * @param classBytes a map of class bytes
+ * @param constants the constants array
+ * @throws IOException
+ */
+ public void putScript(final Source source, final String mainClassName, final Map<String, byte[]> classBytes, final Object[] constants)
+ throws IOException {
+ if (source.getLength() < minSize) {
+ return;
+ }
+ for (final Object constant : constants) {
+ // Make sure all constant data is serializable
+ if (! (constant instanceof Serializable)) {
+ return;
+ }
+ }
+
+ final String digest = BASE64.encodeToString(source.getDigest());
+ final File file = new File(dir, digest);
+ final CompiledScript script = new CompiledScript(source, mainClassName, classBytes, constants);
+
+ try {
+ AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
+ @Override
+ public Void run() throws IOException {
+ try (ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file)))) {
+ out.writeObject(script);
+ }
+ return null;
+ }
+ });
+ } catch (PrivilegedActionException e) {
+ throw (IOException) e.getException();
+ }
+ }
+}
+