#20 Extract entries async

src/main/java/ru/olegcherednik/zip4jvm/decompose/LocalFileHeaderDecompose.java

@@ -128,26 +128,27 @@ private void copyPayload(Path dir, ZipEntry zipEntry, ZipEntryBlock.LocalFileHea
 
         Block content = diagLocalFileHeader.getContent();
         long size = zipEntry.getCompressedSize();
-        long offs = content.getDiskOffs() + content.getSize();
+        // TODO here we should use SrcZip methods
+        long absOffs = content.getDiskOffs() + content.getSize();
 
         EncryptionMethod encryptionMethod = zipEntry.getEncryptionMethod();
 
         if (encryptionMethod.isAes()) {
             AesEncryptionHeaderBlock block = (AesEncryptionHeaderBlock) encryptionHeaderBlock;
 
-            offs += block.getSalt().getSize();
-            offs += block.getPasswordChecksum().getSize();
+            absOffs += block.getSalt().getSize();
+            absOffs += block.getPasswordChecksum().getSize();
 
             size -= block.getSalt().getSize();
             size -= block.getPasswordChecksum().getSize();
             size -= block.getMac().getSize();
         } else if (encryptionMethod == EncryptionMethod.PKWARE) {
             PkwareEncryptionHeaderBlock block = (PkwareEncryptionHeaderBlock) encryptionHeaderBlock;
-            offs += block.getSize();
+            absOffs += block.getSize();
             size -= block.getSize();
         }
 
-        Utils.copyLarge(blockModel.getZipModel(), dir.resolve("payload" + EXT_DATA), offs, size);
+        Utils.copyLarge(blockModel.getZipModel(), dir.resolve("payload" + EXT_DATA), absOffs, absOffs, size);
     }
 
     private EncryptionHeaderDecompose encryptionHeader(EncryptionMethod encryptionMethod,

src/main/java/ru/olegcherednik/zip4jvm/decompose/Utils.java

@@ -50,30 +50,22 @@ public static void print(Path file, Consumer<PrintStream> consumer) throws FileN
     }
 
     public static void copyLarge(ZipModel zipModel, Path out, Block block) throws IOException {
-        copyLarge(zipModel, out, block.getDiskOffs(), block.getSize());
+        copyLarge(zipModel, out, block.getDiskOffs(), block.getAbsOffs(), block.getSize());
     }
 
-    public static void copyLarge(ZipModel zipModel, Path out, long offs, long size) throws IOException {
-        Path file = zipModel.getSrcZip().getDiskByAbsOffs(offs).getPath();
+    public static void copyLarge(ZipModel zipModel, Path out, long diskOffs, long absOffs, long size)
+            throws IOException {
+        Path file = zipModel.getSrcZip().getDiskByAbsOffs(absOffs).getPath();
 
         try (InputStream fis = Files.newInputStream(file);
              OutputStream fos = Files.newOutputStream(out)) {
-            long skipBytes = fis.skip(offs);
-            assert skipBytes == offs;
+            long skipBytes = fis.skip(diskOffs);
+            assert skipBytes == diskOffs;
 
             IOUtils.copyLarge(fis, fos, 0, size);
         }
     }
 
-    public static void copyByteArray(Path out, byte[] buf, Block block) throws IOException {
-        ValidationUtils.requireLessOrEqual(block.getAbsOffs(), Integer.MAX_VALUE, "block.absoluteOffs");
-        ValidationUtils.requireLessOrEqual(block.getSize(), Integer.MAX_VALUE, "block.size");
-
-        try (OutputStream fos = Files.newOutputStream(out)) {
-            fos.write(buf, (int) block.getAbsOffs(), (int) block.getSize());
-        }
-    }
-
     public static void copyByteArray(Path out, byte[] buf) throws IOException {
         Files.write(out, buf);
     }

src/main/java/ru/olegcherednik/zip4jvm/engine/unzip/ConsecutiveAccessDataInputHolder.java

@@ -0,0 +1,69 @@
+/*
+ * 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 ru.olegcherednik.zip4jvm.engine.unzip;
+
+import ru.olegcherednik.zip4jvm.io.in.DataInput;
+import ru.olegcherednik.zip4jvm.io.in.file.consecutive.ConsecutiveAccessDataInput;
+
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.io.IOUtils;
+
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ExecutorService;
+import java.util.function.Supplier;
+
+/**
+ * This class is designed to use with custom {@link ExecutorService} only. It holds a list of all {@link DataInput}
+ * were create in a different threads. When method {@link #release()} is invoked, it closes all created
+ * {@link DataInput}, but it does not clear {@link #THREAD_LOCAL} for all threads. I.e. after invoking
+ * {@link #release()} and then invoking {@link #get()}, the given {@link DataInput} will not be {@literal null}, but it
+ * will be closed and not available to reuse.
+ *
+ * @author Oleg Cherednik
+ * @since 28.12.2024
+ */
+@RequiredArgsConstructor
+public class ConsecutiveAccessDataInputHolder {
+
+    private static final ThreadLocal<ConsecutiveAccessDataInput> THREAD_LOCAL = new ThreadLocal<>();
+
+    private final List<ConsecutiveAccessDataInput> dataInputs = new CopyOnWriteArrayList<>();
+
+    private final Supplier<ConsecutiveAccessDataInput> dataInputSupplier;
+
+    public void release() {
+        // cannot clear all THREAD_LOCAL here
+        dataInputs.forEach(IOUtils::closeQuietly);
+        dataInputs.clear();
+    }
+
+    public ConsecutiveAccessDataInput get() {
+        ConsecutiveAccessDataInput in = THREAD_LOCAL.get();
+
+        if (in == null) {
+            in = dataInputSupplier.get();
+            THREAD_LOCAL.set(in);
+            dataInputs.add(in);
+        }
+
+        return in;
+    }
+
+}

src/main/java/ru/olegcherednik/zip4jvm/engine/unzip/UnzipEngine.java

@@ -28,8 +28,8 @@
 import ru.olegcherednik.zip4jvm.model.password.PasswordProvider;
 import ru.olegcherednik.zip4jvm.model.settings.UnzipSettings;
 import ru.olegcherednik.zip4jvm.model.src.SrcZip;
+import ru.olegcherednik.zip4jvm.utils.quitely.Quietly;
 
-import java.io.IOException;
 import java.nio.file.Path;
 import java.util.Collection;
 import java.util.Collections;
@@ -47,7 +47,17 @@ public final class UnzipEngine implements ZipFile.Reader {
     public UnzipEngine(SrcZip srcZip, UnzipSettings settings) {
         PasswordProvider passwordProvider = settings.getPasswordProvider();
         zipModel = ZipModelBuilder.read(srcZip, settings.getCharsetCustomizer(), passwordProvider);
-        unzipExtractEngine = new UnzipExtractEngine(passwordProvider, zipModel);
+        unzipExtractEngine = createUnzipExtractEngine(settings, zipModel);
+    }
+
+    private static UnzipExtractEngine createUnzipExtractEngine(UnzipSettings settings, ZipModel zipModel) {
+        PasswordProvider passwordProvider = settings.getPasswordProvider();
+
+        if (settings.getAsyncThreads() == UnzipSettings.ASYNC_THREADS_OFF)
+            return new UnzipExtractEngine(passwordProvider, zipModel);
+
+        int totalThreads = settings.getAsyncThreads();
+        return new UnzipExtractAsyncEngine(passwordProvider, zipModel, totalThreads);
     }
 
     // ---------- ZipFile.Reader ----------
@@ -105,9 +115,9 @@ public ZipFile.Entry next() {
         };
     }
 
-    public static RandomAccessDataInput createRandomAccessDataInput(SrcZip srcZip) throws IOException {
-        return srcZip.isSolid() ? new SolidRandomAccessDataInput(srcZip)
-                                : new SplitRandomAccessDataInput(srcZip);
+    public static RandomAccessDataInput createRandomAccessDataInput(SrcZip srcZip) {
+        return Quietly.doRuntime(() -> srcZip.isSolid() ? new SolidRandomAccessDataInput(srcZip)
+                                                        : new SplitRandomAccessDataInput(srcZip));
     }
 
 }

src/main/java/ru/olegcherednik/zip4jvm/engine/unzip/UnzipExtractAsyncEngine.java

@@ -0,0 +1,134 @@
+/*
+ * 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 ru.olegcherednik.zip4jvm.engine.unzip;
+
+import ru.olegcherednik.zip4jvm.model.ZipModel;
+import ru.olegcherednik.zip4jvm.model.entry.ZipEntry;
+import ru.olegcherednik.zip4jvm.model.password.PasswordProvider;
+import ru.olegcherednik.zip4jvm.utils.quitely.Quietly;
+import ru.olegcherednik.zip4jvm.utils.quitely.functions.RunnableWithException;
+
+import org.apache.commons.collections4.CollectionUtils;
+
+import java.nio.file.Path;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinWorkerThread;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * @author Oleg Cherednik
+ * @since 28.12.2024
+ */
+public class UnzipExtractAsyncEngine extends UnzipExtractEngine {
+
+    protected final int totalThreads;
+
+    public UnzipExtractAsyncEngine(PasswordProvider passwordProvider, ZipModel zipModel, int totalThreads) {
+        super(passwordProvider, zipModel);
+        this.totalThreads = totalThreads <= 0 ? Runtime.getRuntime().availableProcessors() : totalThreads;
+    }
+
+    // ---------- UnzipExtractEngine ----------
+
+    @Override
+    protected void extractAllEntries(Path dstDir) {
+        List<CompletableFuture<Void>> tasks = new LinkedList<>();
+        Iterator<ZipEntry> it = zipModel.absOffsAscIterator();
+
+        ConsecutiveAccessDataInputHolder dataInputHolder =
+                new ConsecutiveAccessDataInputHolder(this::createConsecutiveDataInput);
+        ExecutorService executor = createExecutor();
+
+        try {
+            while (it.hasNext()) {
+                ZipEntry zipEntry = it.next();
+                Path file = dstDir.resolve(zipEntry.getFileName());
+
+                CompletableFuture<Void> task = createCompletableFuture(
+                        () -> extractEntry(file, zipEntry, dataInputHolder.get()), executor);
+
+                tasks.add(task);
+            }
+
+            tasks.forEach(CompletableFuture::join);
+        } finally {
+            executor.shutdown();
+            dataInputHolder.release();
+        }
+    }
+
+    @Override
+    protected void extractEntryByPrefix(Path dstDir, Set<String> prefixes) {
+        assert CollectionUtils.isNotEmpty(prefixes);
+
+        List<CompletableFuture<Void>> tasks = new LinkedList<>();
+        Iterator<ZipEntry> it = zipModel.absOffsAscIterator();
+
+        ConsecutiveAccessDataInputHolder dataInputHolder =
+                new ConsecutiveAccessDataInputHolder(this::createConsecutiveDataInput);
+        ExecutorService executor = createExecutor();
+
+        try {
+            while (it.hasNext()) {
+                ZipEntry zipEntry = it.next();
+                String fileName = getFileName(zipEntry, prefixes);
+
+                if (fileName != null) {
+                    Path file = dstDir.resolve(fileName);
+                    CompletableFuture<Void> task = createCompletableFuture(
+                            () -> extractEntry(file, zipEntry, dataInputHolder.get()), executor);
+
+                    tasks.add(task);
+                }
+            }
+
+            tasks.forEach(CompletableFuture::join);
+        } finally {
+            dataInputHolder.release();
+            executor.shutdown();
+        }
+    }
+
+    // ----------
+
+    protected ExecutorService createExecutor() {
+        AtomicInteger counter = new AtomicInteger();
+        String format = String.format("zip4jvm-extract-%%0%dd", String.valueOf(totalThreads).length());
+
+        ForkJoinPool.ForkJoinWorkerThreadFactory factory = pool -> {
+            ForkJoinWorkerThread thread = ForkJoinPool.defaultForkJoinWorkerThreadFactory.newThread(pool);
+            thread.setName(String.format(format, counter.incrementAndGet()));
+            return thread;
+        };
+
+        return new ForkJoinPool(totalThreads, factory, null, false);
+    }
+
+    protected CompletableFuture<Void> createCompletableFuture(RunnableWithException task, Executor executor) {
+        return CompletableFuture.runAsync(() -> Quietly.doRuntime(task), executor);
+    }
+
+}