changeset 16882:f8089e07c9f2

8176895: (fc) Split java/nio/channels/FileChannel/Transfer.java into smaller tests Summary: Move sub-tests writing 4GB and 6GB files into two separate tests Reviewed-by: clanger
author bpb
date Fri, 17 Mar 2017 08:38:12 -0700
parents a2b8bf9a32ce
children f6bf027e88e9 952d3df46b5b
files test/java/nio/channels/FileChannel/Transfer.java test/java/nio/channels/FileChannel/Transfer4GBFile.java test/java/nio/channels/FileChannel/TransferTo6GBFile.java
diffstat 3 files changed, 377 insertions(+), 285 deletions(-) [+]
line wrap: on
line diff
--- a/test/java/nio/channels/FileChannel/Transfer.java	Thu Mar 16 22:58:13 2017 +0000
+++ b/test/java/nio/channels/FileChannel/Transfer.java	Fri Mar 17 08:38:12 2017 -0700
@@ -22,8 +22,7 @@
  */
 
 /* @test
- * @bug 4434723 4482726 4559072 4638365 4795550 5081340 5103988 6253145
- *   6984545
+ * @bug 4434723 4482726 4559072 4795550 5081340 5103988 6984545
  * @key intermittent
  * @summary Test FileChannel.transferFrom and transferTo (use -Dseed=X to set PRNG seed)
  * @library ..
@@ -34,18 +33,13 @@
  */
 
 import java.io.BufferedReader;
-import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.InputStreamReader;
 import java.io.IOException;
-import java.io.OutputStreamWriter;
-import java.io.PrintStream;
 import java.io.RandomAccessFile;
 import java.io.Reader;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.nio.ByteBuffer;
@@ -55,8 +49,6 @@
 import java.nio.channels.ServerSocketChannel;
 import java.nio.channels.SocketChannel;
 import java.nio.channels.spi.SelectorProvider;
-import java.nio.file.StandardOpenOption;
-import java.nio.file.FileAlreadyExistsException;
 import java.util.Random;
 import java.util.concurrent.TimeUnit;
 
@@ -67,8 +59,6 @@
 public class Transfer {
 
     private static Random generator = RandomFactory.getRandom();
-    private static PrintStream err = System.err;
-    private static PrintStream out = System.out;
 
     @Test
     public void testFileChannel() throws Exception {
@@ -242,116 +232,7 @@
         dest.delete();
     }
 
-    // Test transferTo with large file
-    @Test
-    public void xferTest04() throws Exception { // for bug 4638365
-        // Windows and Linux can't handle the really large file sizes for a
-        // truncate or a positional write required by the test for 4563125
-        String osName = System.getProperty("os.name");
-        if (!(osName.startsWith("SunOS") || osName.contains("OS X")))
-            return;
-        File source = File.createTempFile("blah", null);
-        source.deleteOnExit();
-        long testSize = ((long)Integer.MAX_VALUE) * 2;
-        initTestFile(source, 10);
-        RandomAccessFile raf = new RandomAccessFile(source, "rw");
-        FileChannel fc = raf.getChannel();
-        out.println("  Writing large file...");
-        long t0 = System.nanoTime();
-        fc.write(ByteBuffer.wrap("Use the source!".getBytes()), testSize - 40);
-        long t1 = System.nanoTime();
-        out.printf("  Wrote large file in %d ns (%d ms) %n",
-            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
-
-        fc.close();
-        raf.close();
-
-        File sink = File.createTempFile("sink", null);
-        sink.deleteOnExit();
-
-        FileInputStream fis = new FileInputStream(source);
-        FileChannel sourceChannel = fis.getChannel();
-
-        raf = new RandomAccessFile(sink, "rw");
-        FileChannel sinkChannel = raf.getChannel();
-
-        long bytesWritten = sourceChannel.transferTo(testSize -40, 10,
-                                                     sinkChannel);
-        if (bytesWritten != 10) {
-            throw new RuntimeException("Transfer test 4 failed " +
-                                       bytesWritten);
-        }
-        sourceChannel.close();
-        sinkChannel.close();
-
-        source.delete();
-        sink.delete();
-    }
-
-    // Test transferFrom with large file
-    @Test
-    public void xferTest05() throws Exception { // for bug 4638365
-        // Create a source file & large sink file for the test
-        File source = File.createTempFile("blech", null);
-        source.deleteOnExit();
-        initTestFile(source, 100);
-
-        // Create the sink file as a sparse file if possible
-        File sink = null;
-        FileChannel fc = null;
-        while (fc == null) {
-            sink = File.createTempFile("sink", null);
-            // re-create as a sparse file
-            sink.delete();
-            try {
-                fc = FileChannel.open(sink.toPath(),
-                                      StandardOpenOption.CREATE_NEW,
-                                      StandardOpenOption.WRITE,
-                                      StandardOpenOption.SPARSE);
-            } catch (FileAlreadyExistsException ignore) {
-                // someone else got it
-            }
-        }
-        sink.deleteOnExit();
-
-        long testSize = ((long)Integer.MAX_VALUE) * 2;
-        try {
-            out.println("  Writing large file...");
-            long t0 = System.nanoTime();
-            fc.write(ByteBuffer.wrap("Use the source!".getBytes()),
-                     testSize - 40);
-            long t1 = System.nanoTime();
-            out.printf("  Wrote large file in %d ns (%d ms) %n",
-            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
-        } catch (IOException e) {
-            // Can't set up the test, abort it
-            err.println("xferTest05 was aborted.");
-            return;
-        } finally {
-            fc.close();
-        }
-
-        // Get new channels for the source and sink and attempt transfer
-        FileChannel sourceChannel = new FileInputStream(source).getChannel();
-        try {
-            FileChannel sinkChannel = new RandomAccessFile(sink, "rw").getChannel();
-            try {
-                long bytesWritten = sinkChannel.transferFrom(sourceChannel,
-                                                             testSize - 40, 10);
-                if (bytesWritten != 10) {
-                    throw new RuntimeException("Transfer test 5 failed " +
-                                               bytesWritten);
-                }
-            } finally {
-                sinkChannel.close();
-            }
-        } finally {
-            sourceChannel.close();
-        }
-
-        source.delete();
-        sink.delete();
-    }
+    // xferTest04() and xferTest05() moved to Transfer4GBFile.java
 
     static void checkFileData(File file, String expected) throws Exception {
         FileInputStream fis = new FileInputStream(file);
@@ -436,118 +317,7 @@
         source.delete();
     }
 
-
-    // Test transferTo with file positions larger than 2 and 4GB
-    @Test
-    public void xferTest08() throws Exception { // for bug 6253145
-        // Creating a sparse 6GB file on Windows takes too long
-        String osName = System.getProperty("os.name");
-        if (osName.startsWith("Windows"))
-            return;
-
-        final long G = 1024L * 1024L * 1024L;
-
-        // Create 6GB file
-
-        File file = File.createTempFile("source", null);
-        file.deleteOnExit();
-
-        RandomAccessFile raf = new RandomAccessFile(file, "rw");
-        FileChannel fc = raf.getChannel();
-
-        out.println("  Writing large file...");
-        long t0 = System.nanoTime();
-        try {
-            fc.write(ByteBuffer.wrap("0123456789012345".getBytes("UTF-8")), 6*G);
-            long t1 = System.nanoTime();
-            out.printf("  Wrote large file in %d ns (%d ms) %n",
-            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
-        } catch (IOException x) {
-            err.println("  Unable to create test file:" + x);
-            fc.close();
-            return;
-        }
-
-        // Setup looback connection and echo server
-
-        ServerSocketChannel ssc = ServerSocketChannel.open();
-        ssc.socket().bind(new InetSocketAddress(0));
-
-        InetAddress lh = InetAddress.getLocalHost();
-        InetSocketAddress isa = new InetSocketAddress(lh, ssc.socket().getLocalPort());
-        SocketChannel source = SocketChannel.open(isa);
-        SocketChannel sink = ssc.accept();
-
-        Thread thr = new Thread(new EchoServer(sink));
-        thr.start();
-
-        // Test data is array of positions and counts
-
-        long testdata[][] = {
-            { 2*G-1,    1 },
-            { 2*G-1,    10 },       // across 2GB boundary
-            { 2*G,      1 },
-            { 2*G,      10 },
-            { 2*G+1,    1 },
-            { 4*G-1,    1 },
-            { 4*G-1,    10 },       // across 4GB boundary
-            { 4*G,      1 },
-            { 4*G,      10 },
-            { 4*G+1,    1 },
-            { 5*G-1,    1 },
-            { 5*G-1,    10 },
-            { 5*G,      1 },
-            { 5*G,      10 },
-            { 5*G+1,    1 },
-            { 6*G,      1 },
-        };
-
-        ByteBuffer sendbuf = ByteBuffer.allocateDirect(100);
-        ByteBuffer readbuf = ByteBuffer.allocateDirect(100);
-
-        try {
-            byte value = 0;
-            for (int i=0; i<testdata.length; i++) {
-                long position = testdata[(int)i][0];
-                long count = testdata[(int)i][1];
-
-                // generate bytes
-                for (long j=0; j<count; j++) {
-                    sendbuf.put(++value);
-                }
-                sendbuf.flip();
-
-                // write to file and transfer to echo server
-                fc.write(sendbuf, position);
-                t0 = System.nanoTime();
-                fc.transferTo(position, count, source);
-                out.printf("  transferTo(%d, %2d, source): %d ns%n",
-                    position, count, System.nanoTime() - t0);
-
-                // read from echo server
-                long nread = 0;
-                while (nread < count) {
-                    int n = source.read(readbuf);
-                    if (n < 0)
-                        throw new RuntimeException("Premature EOF!");
-                    nread += n;
-                }
-
-                // check reply from echo server
-                readbuf.flip();
-                sendbuf.flip();
-                if (!readbuf.equals(sendbuf))
-                    throw new RuntimeException("Echoed bytes do not match!");
-                readbuf.clear();
-                sendbuf.clear();
-            }
-        } finally {
-            source.close();
-            ssc.close();
-            fc.close();
-            file.delete();
-        }
-    }
+    // xferTest08() moved to TransferTo6GBFile.java
 
     // Test that transferFrom with FileChannel source that is not readable
     // throws NonReadableChannelException
@@ -570,56 +340,4 @@
             fc2.close();
         }
     }
-
-    /**
-     * Creates file blah of specified size in bytes.
-     */
-    private static void initTestFile(File blah, long size) throws Exception {
-        if (blah.exists())
-            blah.delete();
-        FileOutputStream fos = new FileOutputStream(blah);
-        BufferedWriter awriter
-            = new BufferedWriter(new OutputStreamWriter(fos, "8859_1"));
-
-        for(int i=0; i<size; i++) {
-            awriter.write("e");
-        }
-        awriter.flush();
-        awriter.close();
-    }
-
-    /**
-     * Simple in-process server to echo bytes read by a given socket channel
-     */
-    static class EchoServer implements Runnable {
-        private SocketChannel sc;
-
-        public EchoServer(SocketChannel sc) {
-            this.sc = sc;
-        }
-
-        public void run() {
-            ByteBuffer bb = ByteBuffer.allocateDirect(1024);
-            try {
-                for (;;) {
-                    int n = sc.read(bb);
-                    if (n < 0)
-                        break;
-
-                    bb.flip();
-                    while (bb.remaining() > 0) {
-                        sc.write(bb);
-                    }
-                    bb.clear();
-                }
-            } catch (IOException x) {
-                x.printStackTrace();
-            } finally {
-                try {
-                    sc.close();
-                } catch (IOException ignore) { }
-            }
-        }
-    }
-
 }
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/nio/channels/FileChannel/Transfer4GBFile.java	Fri Mar 17 08:38:12 2017 -0700
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2001, 2017, 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.
+ *
+ * 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.
+ */
+
+/* @test
+ * @bug 4638365
+ * @key intermittent
+ * @summary Test FileChannel.transferFrom and transferTo for 4GB files
+ * @run testng/timeout=300 Transfer4GBFile
+ */
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.PrintStream;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.StandardOpenOption;
+import java.nio.file.FileAlreadyExistsException;
+import java.util.concurrent.TimeUnit;
+
+import org.testng.annotations.Test;
+
+public class Transfer4GBFile {
+
+    private static PrintStream err = System.err;
+    private static PrintStream out = System.out;
+
+    // Test transferTo with large file
+    @Test
+    public void xferTest04() throws Exception { // for bug 4638365
+        // Windows and Linux can't handle the really large file sizes for a
+        // truncate or a positional write required by the test for 4563125
+        String osName = System.getProperty("os.name");
+        if (!(osName.startsWith("SunOS") || osName.contains("OS X")))
+            return;
+        File source = File.createTempFile("blah", null);
+        source.deleteOnExit();
+        long testSize = ((long)Integer.MAX_VALUE) * 2;
+        initTestFile(source, 10);
+        RandomAccessFile raf = new RandomAccessFile(source, "rw");
+        FileChannel fc = raf.getChannel();
+        out.println("  Writing large file...");
+        long t0 = System.nanoTime();
+        fc.write(ByteBuffer.wrap("Use the source!".getBytes()), testSize - 40);
+        long t1 = System.nanoTime();
+        out.printf("  Wrote large file in %d ns (%d ms) %n",
+            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
+
+        fc.close();
+        raf.close();
+
+        File sink = File.createTempFile("sink", null);
+        sink.deleteOnExit();
+
+        FileInputStream fis = new FileInputStream(source);
+        FileChannel sourceChannel = fis.getChannel();
+
+        raf = new RandomAccessFile(sink, "rw");
+        FileChannel sinkChannel = raf.getChannel();
+
+        long bytesWritten = sourceChannel.transferTo(testSize -40, 10,
+                                                     sinkChannel);
+        if (bytesWritten != 10) {
+            throw new RuntimeException("Transfer test 4 failed " +
+                                       bytesWritten);
+        }
+        sourceChannel.close();
+        sinkChannel.close();
+
+        source.delete();
+        sink.delete();
+    }
+
+    // Test transferFrom with large file
+    @Test
+    public void xferTest05() throws Exception { // for bug 4638365
+        // Create a source file & large sink file for the test
+        File source = File.createTempFile("blech", null);
+        source.deleteOnExit();
+        initTestFile(source, 100);
+
+        // Create the sink file as a sparse file if possible
+        File sink = null;
+        FileChannel fc = null;
+        while (fc == null) {
+            sink = File.createTempFile("sink", null);
+            // re-create as a sparse file
+            sink.delete();
+            try {
+                fc = FileChannel.open(sink.toPath(),
+                                      StandardOpenOption.CREATE_NEW,
+                                      StandardOpenOption.WRITE,
+                                      StandardOpenOption.SPARSE);
+            } catch (FileAlreadyExistsException ignore) {
+                // someone else got it
+            }
+        }
+        sink.deleteOnExit();
+
+        long testSize = ((long)Integer.MAX_VALUE) * 2;
+        try {
+            out.println("  Writing large file...");
+            long t0 = System.nanoTime();
+            fc.write(ByteBuffer.wrap("Use the source!".getBytes()),
+                     testSize - 40);
+            long t1 = System.nanoTime();
+            out.printf("  Wrote large file in %d ns (%d ms) %n",
+            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
+        } catch (IOException e) {
+            // Can't set up the test, abort it
+            err.println("xferTest05 was aborted.");
+            return;
+        } finally {
+            fc.close();
+        }
+
+        // Get new channels for the source and sink and attempt transfer
+        FileChannel sourceChannel = new FileInputStream(source).getChannel();
+        try {
+            FileChannel sinkChannel = new RandomAccessFile(sink, "rw").getChannel();
+            try {
+                long bytesWritten = sinkChannel.transferFrom(sourceChannel,
+                                                             testSize - 40, 10);
+                if (bytesWritten != 10) {
+                    throw new RuntimeException("Transfer test 5 failed " +
+                                               bytesWritten);
+                }
+            } finally {
+                sinkChannel.close();
+            }
+        } finally {
+            sourceChannel.close();
+        }
+
+        source.delete();
+        sink.delete();
+    }
+
+    /**
+     * Creates file blah of specified size in bytes.
+     */
+    private static void initTestFile(File blah, long size) throws Exception {
+        if (blah.exists())
+            blah.delete();
+        FileOutputStream fos = new FileOutputStream(blah);
+        BufferedWriter awriter
+            = new BufferedWriter(new OutputStreamWriter(fos, "8859_1"));
+
+        for(int i=0; i<size; i++) {
+            awriter.write("e");
+        }
+        awriter.flush();
+        awriter.close();
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/nio/channels/FileChannel/TransferTo6GBFile.java	Fri Mar 17 08:38:12 2017 -0700
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2001, 2017, 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.
+ *
+ * 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.
+ */
+
+/* @test
+ * @bug 6253145
+ * @key intermittent
+ * @summary Test FileChannel.transferTo with file positions up to 8GB
+ * @run testng/timeout=300 TransferTo6GBFile
+ */
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.io.RandomAccessFile;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+import java.util.concurrent.TimeUnit;
+
+import org.testng.annotations.Test;
+
+public class TransferTo6GBFile {
+
+    private static PrintStream err = System.err;
+    private static PrintStream out = System.out;
+
+    // Test transferTo with file positions larger than 2 and 4GB
+    @Test
+    public void xferTest08() throws Exception { // for bug 6253145
+        // Creating a sparse 6GB file on Windows takes too long
+        String osName = System.getProperty("os.name");
+        if (osName.startsWith("Windows"))
+            return;
+
+        final long G = 1024L * 1024L * 1024L;
+
+        // Create 6GB file
+
+        File file = File.createTempFile("source", null);
+        file.deleteOnExit();
+
+        RandomAccessFile raf = new RandomAccessFile(file, "rw");
+        FileChannel fc = raf.getChannel();
+
+        out.println("  Writing large file...");
+        long t0 = System.nanoTime();
+        try {
+            fc.write(ByteBuffer.wrap("0123456789012345".getBytes("UTF-8")), 6*G);
+            long t1 = System.nanoTime();
+            out.printf("  Wrote large file in %d ns (%d ms) %n",
+            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
+        } catch (IOException x) {
+            err.println("  Unable to create test file:" + x);
+            fc.close();
+            return;
+        }
+
+        // Setup looback connection and echo server
+
+        ServerSocketChannel ssc = ServerSocketChannel.open();
+        ssc.socket().bind(new InetSocketAddress(0));
+
+        InetAddress lh = InetAddress.getLocalHost();
+        InetSocketAddress isa = new InetSocketAddress(lh, ssc.socket().getLocalPort());
+        SocketChannel source = SocketChannel.open(isa);
+        SocketChannel sink = ssc.accept();
+
+        Thread thr = new Thread(new EchoServer(sink));
+        thr.start();
+
+        // Test data is array of positions and counts
+
+        long testdata[][] = {
+            { 2*G-1,    1 },
+            { 2*G-1,    10 },       // across 2GB boundary
+            { 2*G,      1 },
+            { 2*G,      10 },
+            { 2*G+1,    1 },
+            { 4*G-1,    1 },
+            { 4*G-1,    10 },       // across 4GB boundary
+            { 4*G,      1 },
+            { 4*G,      10 },
+            { 4*G+1,    1 },
+            { 5*G-1,    1 },
+            { 5*G-1,    10 },
+            { 5*G,      1 },
+            { 5*G,      10 },
+            { 5*G+1,    1 },
+            { 6*G,      1 },
+        };
+
+        ByteBuffer sendbuf = ByteBuffer.allocateDirect(100);
+        ByteBuffer readbuf = ByteBuffer.allocateDirect(100);
+
+        try {
+            byte value = 0;
+            for (int i=0; i<testdata.length; i++) {
+                long position = testdata[(int)i][0];
+                long count = testdata[(int)i][1];
+
+                // generate bytes
+                for (long j=0; j<count; j++) {
+                    sendbuf.put(++value);
+                }
+                sendbuf.flip();
+
+                // write to file and transfer to echo server
+                fc.write(sendbuf, position);
+                t0 = System.nanoTime();
+                fc.transferTo(position, count, source);
+                out.printf("  transferTo(%d, %2d, source): %d ns%n",
+                    position, count, System.nanoTime() - t0);
+
+                // read from echo server
+                long nread = 0;
+                while (nread < count) {
+                    int n = source.read(readbuf);
+                    if (n < 0)
+                        throw new RuntimeException("Premature EOF!");
+                    nread += n;
+                }
+
+                // check reply from echo server
+                readbuf.flip();
+                sendbuf.flip();
+                if (!readbuf.equals(sendbuf))
+                    throw new RuntimeException("Echoed bytes do not match!");
+                readbuf.clear();
+                sendbuf.clear();
+            }
+        } finally {
+            source.close();
+            ssc.close();
+            fc.close();
+            file.delete();
+        }
+    }
+
+    /**
+     * Simple in-process server to echo bytes read by a given socket channel
+     */
+    static class EchoServer implements Runnable {
+        private SocketChannel sc;
+
+        public EchoServer(SocketChannel sc) {
+            this.sc = sc;
+        }
+
+        public void run() {
+            ByteBuffer bb = ByteBuffer.allocateDirect(1024);
+            try {
+                for (;;) {
+                    int n = sc.read(bb);
+                    if (n < 0)
+                        break;
+
+                    bb.flip();
+                    while (bb.remaining() > 0) {
+                        sc.write(bb);
+                    }
+                    bb.clear();
+                }
+            } catch (IOException x) {
+                x.printStackTrace();
+            } finally {
+                try {
+                    sc.close();
+                } catch (IOException ignore) { }
+            }
+        }
+    }
+}