| /* |
| * 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.netbeans.lib.profiler.heap; |
| |
| import java.io.DataInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| |
| /** |
| * This is factory class for creating {@link Heap} from the file in Hprof dump format. |
| * @author Tomas Hurka |
| */ |
| public class HeapFactory { |
| //~ Methods ------------------------------------------------------------------------------------------------------------------ |
| |
| /** |
| * this factory method creates {@link Heap} from a memory dump file in Hprof format. |
| * <br> |
| * Speed: slow |
| * @param heapDump file which contains memory dump |
| * @return implementation of {@link Heap} corresponding to the memory dump |
| * passed in heapDump parameter |
| * @throws java.io.FileNotFoundException if heapDump file does not exist |
| * @throws java.io.IOException if I/O error occurred while accessing heapDump file |
| */ |
| public static Heap createHeap(java.io.File heapDump) throws FileNotFoundException, IOException { |
| return createHeap(heapDump, 0); |
| } |
| |
| /** |
| * this factory method creates {@link Heap} from a memory dump file in Hprof format. |
| * If the memory dump file contains more than one dump, parameter segment is used to |
| * select particular dump. |
| * <br> |
| * Speed: slow |
| * @return implementation of {@link Heap} corresponding to the memory dump |
| * passed in heapDump parameter |
| * @param segment select corresponding dump from multi-dump file |
| * @param heapDump file which contains memory dump |
| * @throws java.io.FileNotFoundException if heapDump file does not exist |
| * @throws java.io.IOException if I/O error occurred while accessing heapDump file |
| */ |
| public static Heap createHeap(java.io.File heapDump, int segment) |
| throws FileNotFoundException, IOException { |
| File hd = JavaIoFile.IO.newFile(heapDump); |
| CacheDirectory cacheDir = CacheDirectory.getHeapDumpCacheDirectory(JavaIoFile.IO, hd, segment); |
| if (!cacheDir.isTemporary()) { |
| File savedDump = cacheDir.getHeapDumpAuxFile(); |
| |
| if (savedDump.exists() && savedDump.isFile() && savedDump.canRead()) { |
| try { |
| return loadHeap(cacheDir); |
| } catch (IOException ex) { |
| Systems.printStackTrace("Loading heap dump "+heapDump+" from cache failed.", ex); |
| } |
| } |
| } |
| return new HprofHeap(hd, segment, cacheDir); |
| |
| } |
| |
| /** Factory method for processing heap dumps in memory. When heap data |
| * aren't available on disk, but only in memory, create a {@link ByteBuffer} |
| * from them and use this factory method to create their {@link Heap} |
| * representation. |
| * |
| * @param buffer data representing the heap dump |
| * @param segment select corresponding dump from multi-dump file |
| * @return implementation of {@link Heap} corresponding to the memory dump |
| * passed in the {@code buffer} parameter |
| * @throws IOException if the access to the buffer fails or data are corrupted |
| * @since 1.122 |
| */ |
| public static Heap createHeap(ByteBuffer buffer, int segment) throws IOException { |
| return new HprofHeap(buffer, segment, new CacheDirectory(JavaIoFile.IO, null)); |
| } |
| |
| static Heap loadHeap(CacheDirectory cacheDir) |
| throws FileNotFoundException, IOException { |
| File savedDump = cacheDir.getHeapDumpAuxFile(); |
| DataInputStream dis = savedDump.newDataInputStream(64*1024); |
| Heap heap = new HprofHeap(dis, cacheDir); |
| dis.close(); |
| return heap; |
| } |
| |
| } |