src/com/owncloud/android/network/webdav/ChunkFromFileChannelRequestEntity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013 ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17
  18 package com.owncloud.android.network.webdav;
  19
  20 import java.io.File;
  21 import java.io.IOException;
  22 import java.io.OutputStream;
  23 import java.nio.ByteBuffer;
  24 import java.nio.channels.FileChannel;
  25 import java.util.Collection;
  26 import java.util.HashSet;
  27 import java.util.Iterator;
  28 import java.util.Set;
  29
  30 import org.apache.commons.httpclient.methods.RequestEntity;
  31
  32 import com.owncloud.android.Log_OC;
  33 import com.owncloud.android.network.ProgressiveDataTransferer;
  34
  35
  36
  37 /**
  38  * A RequestEntity that represents a PIECE of a file.
  39  *
  40  * @author David A. Velasco
  41  */
  42 public class ChunkFromFileChannelRequestEntity implements RequestEntity, ProgressiveDataTransferer {
  43
  44     private static final String TAG = ChunkFromFileChannelRequestEntity.class.getSimpleName();
  45
  46     //private final File mFile;
  47     private final FileChannel mChannel;
  48     private final String mContentType;
  49     private final long mChunkSize;
  50     private final File mFile;
  51     private long mOffset;
  52     private long mTransferred;
  53     Set<OnDatatransferProgressListener> mDataTransferListeners = new HashSet<OnDatatransferProgressListener>();
  54     private ByteBuffer mBuffer = ByteBuffer.allocate(4096);
  55
  56     public ChunkFromFileChannelRequestEntity(final FileChannel channel, final String contentType, long chunkSize, final File file) {
  57         super();
  58         if (channel == null) {
  59             throw new IllegalArgumentException("File may not be null");
  60         }
  61         if (chunkSize <= 0) {
  62             throw new IllegalArgumentException("Chunk size must be greater than zero");
  63         }
  64         mChannel = channel;
  65         mContentType = contentType;
  66         mChunkSize = chunkSize;
  67         mFile = file;
  68         mOffset = 0;
  69         mTransferred = 0;
  70     }
  71
  72     public void setOffset(long offset) {
  73         mOffset = offset;
  74     }
  75
  76     public long getContentLength() {
  77         try {
  78             return Math.min(mChunkSize, mChannel.size() - mChannel.position());
  79         } catch (IOException e) {
  80             return mChunkSize;
  81         }
  82     }
  83
  84     public String getContentType() {
  85         return mContentType;
  86     }
  87
  88     public boolean isRepeatable() {
  89         return true;
  90     }
  91
  92     @Override
  93     public void addDatatransferProgressListener(OnDatatransferProgressListener listener) {
  94         synchronized (mDataTransferListeners) {
  95             mDataTransferListeners.add(listener);
  96         }
  97     }
  98
  99     @Override
 100     public void addDatatransferProgressListeners(Collection<OnDatatransferProgressListener> listeners) {
 101         synchronized (mDataTransferListeners) {
 102             mDataTransferListeners.addAll(listeners);
 103         }
 104     }
 105
 106     @Override
 107     public void removeDatatransferProgressListener(OnDatatransferProgressListener listener) {
 108         synchronized (mDataTransferListeners) {
 109             mDataTransferListeners.remove(listener);
 110         }
 111     }
 112
 113
 114     public void writeRequest(final OutputStream out) throws IOException {
 115         int readCount = 0;
 116         Iterator<OnDatatransferProgressListener> it = null;
 117
 118        try {
 119             mChannel.position(mOffset);
 120             long size = mFile.length();
 121             if (size == 0) size = -1;
 122             long maxCount = Math.min(mOffset + mChunkSize, mChannel.size());
 123             while (mChannel.position() < maxCount) {
 124                 readCount = mChannel.read(mBuffer);
 125                 out.write(mBuffer.array(), 0, readCount);
 126                 mBuffer.clear();
 127                 if (mTransferred < maxCount) {  // condition to avoid accumulate progress for repeated chunks
 128                     mTransferred += readCount;
 129                 }
 130                 synchronized (mDataTransferListeners) {
 131                     it = mDataTransferListeners.iterator();
 132                     while (it.hasNext()) {
 133                         it.next().onTransferProgress(readCount, mTransferred, size, mFile.getName());
 134                     }
 135                 }
 136             }
 137
 138         } catch (IOException io) {
 139             Log_OC.e(TAG, io.getMessage());
 140             throw new RuntimeException("Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really", io);
 141
 142         }
 143     }
 144
 145 }