Mercurial > jdk8-mips64-public > langtools / annotate
src/share/classes/com/sun/tools/javac/file/ZipFileIndexCache.java@71f35e4b93a5 (annotated)
src/share/classes/com/sun/tools/javac/file/ZipFileIndexCache.java
Wed, 23 Jan 2013 13:27:24 -0800
- author
- jjg
- date
- Wed, 23 Jan 2013 13:27:24 -0800
- changeset 1521
- 71f35e4b93a5
- parent 0
- 959103a6100f
- permissions
- -rw-r--r--
8006775: JSR 308: Compiler changes in JDK8
Reviewed-by: jjg
Contributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
| aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
| aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
| aoqi@0 | 10 | * |
| aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 15 | * accompanied this code). |
| aoqi@0 | 16 | * |
| aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 20 | * |
| aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 23 | * questions. |
| aoqi@0 | 24 | */ |
| aoqi@0 | 25 | |
| aoqi@0 | 26 | package com.sun.tools.javac.file; |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | import com.sun.tools.javac.file.RelativePath.RelativeDirectory; |
| aoqi@0 | 29 | import com.sun.tools.javac.util.Context; |
| aoqi@0 | 30 | import java.io.File; |
| aoqi@0 | 31 | import java.io.IOException; |
| aoqi@0 | 32 | import java.util.ArrayList; |
| aoqi@0 | 33 | import java.util.HashMap; |
| aoqi@0 | 34 | import java.util.Iterator; |
| aoqi@0 | 35 | import java.util.List; |
| aoqi@0 | 36 | import java.util.Map; |
| aoqi@0 | 37 | |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | /** A cache for ZipFileIndex objects. */ |
| aoqi@0 | 40 | public class ZipFileIndexCache { |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | private final Map<File, ZipFileIndex> map = |
| aoqi@0 | 43 | new HashMap<File, ZipFileIndex>(); |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | /** Get a shared instance of the cache. */ |
| aoqi@0 | 46 | private static ZipFileIndexCache sharedInstance; |
| aoqi@0 | 47 | public synchronized static ZipFileIndexCache getSharedInstance() { |
| aoqi@0 | 48 | if (sharedInstance == null) |
| aoqi@0 | 49 | sharedInstance = new ZipFileIndexCache(); |
| aoqi@0 | 50 | return sharedInstance; |
| aoqi@0 | 51 | } |
| aoqi@0 | 52 | |
| aoqi@0 | 53 | /** Get a context-specific instance of a cache. */ |
| aoqi@0 | 54 | public static ZipFileIndexCache instance(Context context) { |
| aoqi@0 | 55 | ZipFileIndexCache instance = context.get(ZipFileIndexCache.class); |
| aoqi@0 | 56 | if (instance == null) |
| aoqi@0 | 57 | context.put(ZipFileIndexCache.class, instance = new ZipFileIndexCache()); |
| aoqi@0 | 58 | return instance; |
| aoqi@0 | 59 | } |
| aoqi@0 | 60 | |
| aoqi@0 | 61 | /** |
| aoqi@0 | 62 | * Returns a list of all ZipFileIndex entries |
| aoqi@0 | 63 | * |
| aoqi@0 | 64 | * @return A list of ZipFileIndex entries, or an empty list |
| aoqi@0 | 65 | */ |
| aoqi@0 | 66 | public List<ZipFileIndex> getZipFileIndexes() { |
| aoqi@0 | 67 | return getZipFileIndexes(false); |
| aoqi@0 | 68 | } |
| aoqi@0 | 69 | |
| aoqi@0 | 70 | /** |
| aoqi@0 | 71 | * Returns a list of all ZipFileIndex entries |
| aoqi@0 | 72 | * |
| aoqi@0 | 73 | * @param openedOnly If true it returns a list of only opened ZipFileIndex entries, otherwise |
| aoqi@0 | 74 | * all ZipFileEntry(s) are included into the list. |
| aoqi@0 | 75 | * @return A list of ZipFileIndex entries, or an empty list |
| aoqi@0 | 76 | */ |
| aoqi@0 | 77 | public synchronized List<ZipFileIndex> getZipFileIndexes(boolean openedOnly) { |
| aoqi@0 | 78 | List<ZipFileIndex> zipFileIndexes = new ArrayList<ZipFileIndex>(); |
| aoqi@0 | 79 | |
| aoqi@0 | 80 | zipFileIndexes.addAll(map.values()); |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | if (openedOnly) { |
| aoqi@0 | 83 | for(ZipFileIndex elem : zipFileIndexes) { |
| aoqi@0 | 84 | if (!elem.isOpen()) { |
| aoqi@0 | 85 | zipFileIndexes.remove(elem); |
| aoqi@0 | 86 | } |
| aoqi@0 | 87 | } |
| aoqi@0 | 88 | } |
| aoqi@0 | 89 | |
| aoqi@0 | 90 | return zipFileIndexes; |
| aoqi@0 | 91 | } |
| aoqi@0 | 92 | |
| aoqi@0 | 93 | public synchronized ZipFileIndex getZipFileIndex(File zipFile, |
| aoqi@0 | 94 | RelativeDirectory symbolFilePrefix, |
| aoqi@0 | 95 | boolean useCache, String cacheLocation, |
| aoqi@0 | 96 | boolean writeIndex) throws IOException { |
| aoqi@0 | 97 | ZipFileIndex zi = getExistingZipIndex(zipFile); |
| aoqi@0 | 98 | |
| aoqi@0 | 99 | if (zi == null || (zi != null && zipFile.lastModified() != zi.zipFileLastModified)) { |
| aoqi@0 | 100 | zi = new ZipFileIndex(zipFile, symbolFilePrefix, writeIndex, |
| aoqi@0 | 101 | useCache, cacheLocation); |
| aoqi@0 | 102 | map.put(zipFile, zi); |
| aoqi@0 | 103 | } |
| aoqi@0 | 104 | return zi; |
| aoqi@0 | 105 | } |
| aoqi@0 | 106 | |
| aoqi@0 | 107 | public synchronized ZipFileIndex getExistingZipIndex(File zipFile) { |
| aoqi@0 | 108 | return map.get(zipFile); |
| aoqi@0 | 109 | } |
| aoqi@0 | 110 | |
| aoqi@0 | 111 | public synchronized void clearCache() { |
| aoqi@0 | 112 | map.clear(); |
| aoqi@0 | 113 | } |
| aoqi@0 | 114 | |
| aoqi@0 | 115 | public synchronized void clearCache(long timeNotUsed) { |
| aoqi@0 | 116 | Iterator<File> cachedFileIterator = map.keySet().iterator(); |
| aoqi@0 | 117 | while (cachedFileIterator.hasNext()) { |
| aoqi@0 | 118 | File cachedFile = cachedFileIterator.next(); |
| aoqi@0 | 119 | ZipFileIndex cachedZipIndex = map.get(cachedFile); |
| aoqi@0 | 120 | if (cachedZipIndex != null) { |
| aoqi@0 | 121 | long timeToTest = cachedZipIndex.lastReferenceTimeStamp + timeNotUsed; |
| aoqi@0 | 122 | if (timeToTest < cachedZipIndex.lastReferenceTimeStamp || // Overflow... |
| aoqi@0 | 123 | System.currentTimeMillis() > timeToTest) { |
| aoqi@0 | 124 | map.remove(cachedFile); |
| aoqi@0 | 125 | } |
| aoqi@0 | 126 | } |
| aoqi@0 | 127 | } |
| aoqi@0 | 128 | } |
| aoqi@0 | 129 | |
| aoqi@0 | 130 | public synchronized void removeFromCache(File file) { |
| aoqi@0 | 131 | map.remove(file); |
| aoqi@0 | 132 | } |
| aoqi@0 | 133 | |
| aoqi@0 | 134 | /** Sets already opened list of ZipFileIndexes from an outside client |
| aoqi@0 | 135 | * of the compiler. This functionality should be used in a non-batch clients of the compiler. |
| aoqi@0 | 136 | */ |
| aoqi@0 | 137 | public synchronized void setOpenedIndexes(List<ZipFileIndex>indexes) throws IllegalStateException { |
| aoqi@0 | 138 | if (map.isEmpty()) { |
| aoqi@0 | 139 | String msg = |
| aoqi@0 | 140 | "Setting opened indexes should be called only when the ZipFileCache is empty. " |
| aoqi@0 | 141 | + "Call JavacFileManager.flush() before calling this method."; |
| aoqi@0 | 142 | throw new IllegalStateException(msg); |
| aoqi@0 | 143 | } |
| aoqi@0 | 144 | |
| aoqi@0 | 145 | for (ZipFileIndex zfi : indexes) { |
| aoqi@0 | 146 | map.put(zfi.zipFile, zfi); |
| aoqi@0 | 147 | } |
| aoqi@0 | 148 | } |
| aoqi@0 | 149 | } |
