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annotate src/org/eclipse/jetty/io/nio/DirectNIOBuffer.java @ 1020:6be43ef1eb96
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Mon, 31 Oct 2016 22:24:41 -0600 |
| parents | 2712133d5bce |
| children | 80cad9086593 |
| rev | line source |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.io.nio; |
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20 |
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21 import java.io.File; |
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22 import java.io.FileInputStream; |
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23 import java.io.IOException; |
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24 import java.io.InputStream; |
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25 import java.io.OutputStream; |
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26 import java.nio.ByteBuffer; |
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27 import java.nio.channels.Channels; |
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28 import java.nio.channels.FileChannel; |
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29 import java.nio.channels.ReadableByteChannel; |
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30 import java.nio.channels.WritableByteChannel; |
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31 |
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32 import org.eclipse.jetty.io.AbstractBuffer; |
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33 import org.eclipse.jetty.io.Buffer; |
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34 import org.eclipse.jetty.util.IO; |
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35 import org.slf4j.Logger; |
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36 import org.slf4j.LoggerFactory; |
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37 |
| 1010 | 38 |
| 39 public final class DirectNIOBuffer extends AbstractBuffer implements NIOBuffer | |
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40 { |
| 1010 | 41 private static final Logger LOG = LoggerFactory.getLogger(DirectNIOBuffer.class); |
| 42 | |
| 43 protected final ByteBuffer _buf; | |
| 44 private ReadableByteChannel _in; | |
| 45 private InputStream _inStream; | |
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46 |
| 1010 | 47 public DirectNIOBuffer(int size) |
| 48 { | |
| 49 super(READWRITE,NON_VOLATILE); | |
| 50 _buf = ByteBuffer.allocateDirect(size); | |
| 51 _buf.position(0); | |
| 52 _buf.limit(_buf.capacity()); | |
| 53 } | |
| 54 | |
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55 |
| 1010 | 56 @Override |
| 57 public boolean isDirect() | |
| 58 { | |
| 59 return true; | |
| 60 } | |
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61 |
| 1010 | 62 @Override |
| 63 public byte[] array() | |
| 64 { | |
| 65 return null; | |
| 66 } | |
| 67 | |
| 68 @Override | |
| 69 public int capacity() | |
| 70 { | |
| 71 return _buf.capacity(); | |
| 72 } | |
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73 |
| 1010 | 74 @Override |
| 75 public byte peek(int position) | |
| 76 { | |
| 77 return _buf.get(position); | |
| 78 } | |
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79 |
| 1010 | 80 @Override |
| 81 public int peek(int index, byte[] b, int offset, int length) | |
| 82 { | |
| 83 int l = length; | |
| 84 if (index+l > capacity()) | |
| 85 { | |
| 86 l=capacity()-index; | |
| 87 if (l==0) | |
| 88 return -1; | |
| 89 } | |
| 90 | |
| 91 if (l < 0) | |
| 92 return -1; | |
| 93 try | |
| 94 { | |
| 95 _buf.position(index); | |
| 96 _buf.get(b,offset,l); | |
| 97 } | |
| 98 finally | |
| 99 { | |
| 100 _buf.position(0); | |
| 101 } | |
| 102 | |
| 103 return l; | |
| 104 } | |
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105 |
| 1010 | 106 @Override |
| 107 public void poke(int index, byte b) | |
| 108 { | |
| 109 if (isReadOnly()) throw new IllegalStateException(__READONLY); | |
| 110 if (index < 0) throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 111 if (index > capacity()) | |
| 112 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 113 _buf.put(index,b); | |
| 114 } | |
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115 |
| 1010 | 116 @Override |
| 117 public int poke(int index, Buffer src) | |
| 118 { | |
| 119 if (isReadOnly()) throw new IllegalStateException(__READONLY); | |
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120 |
| 1010 | 121 byte[] array=src.array(); |
| 122 if (array!=null) | |
| 123 { | |
| 124 return poke(index,array,src.getIndex(),src.length()); | |
| 125 } | |
| 126 else | |
| 127 { | |
| 128 Buffer src_buf=src.buffer(); | |
| 129 if (src_buf instanceof DirectNIOBuffer) | |
| 130 { | |
| 131 ByteBuffer src_bytebuf = ((DirectNIOBuffer)src_buf)._buf; | |
| 132 if (src_bytebuf==_buf) | |
| 133 src_bytebuf=_buf.duplicate(); | |
| 134 try | |
| 135 { | |
| 136 _buf.position(index); | |
| 137 int space = _buf.remaining(); | |
| 138 | |
| 139 int length=src.length(); | |
| 140 if (length>space) | |
| 141 length=space; | |
| 142 | |
| 143 src_bytebuf.position(src.getIndex()); | |
| 144 src_bytebuf.limit(src.getIndex()+length); | |
| 145 | |
| 146 _buf.put(src_bytebuf); | |
| 147 return length; | |
| 148 } | |
| 149 finally | |
| 150 { | |
| 151 _buf.position(0); | |
| 152 src_bytebuf.limit(src_bytebuf.capacity()); | |
| 153 src_bytebuf.position(0); | |
| 154 } | |
| 155 } | |
| 156 else | |
| 157 return super.poke(index,src); | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 @Override | |
| 162 public int poke(int index, byte[] b, int offset, int length) | |
| 163 { | |
| 164 if (isReadOnly()) throw new IllegalStateException(__READONLY); | |
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165 |
| 1010 | 166 if (index < 0) throw new IllegalArgumentException("index<0: " + index + "<0"); |
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167 |
| 1010 | 168 if (index + length > capacity()) |
| 169 { | |
| 170 length=capacity()-index; | |
| 171 if (length<0) | |
| 172 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 173 } | |
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174 |
| 1010 | 175 try |
| 176 { | |
| 177 _buf.position(index); | |
| 178 | |
| 179 int space=_buf.remaining(); | |
| 180 | |
| 181 if (length>space) | |
| 182 length=space; | |
| 183 if (length>0) | |
| 184 _buf.put(b,offset,length); | |
| 185 return length; | |
| 186 } | |
| 187 finally | |
| 188 { | |
| 189 _buf.position(0); | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 @Override | |
| 194 public ByteBuffer getByteBuffer() | |
| 195 { | |
| 196 return _buf; | |
| 197 } | |
| 198 | |
| 199 @Override | |
| 200 public int readFrom(InputStream in, int max) throws IOException | |
| 201 { | |
| 202 if (_in==null || !_in.isOpen() || in!=_inStream) | |
| 203 { | |
| 204 _in = Channels.newChannel(in); | |
| 205 _inStream = in; | |
| 206 } | |
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207 |
| 1010 | 208 if (max<0 || max>space()) |
| 209 max=space(); | |
| 210 int p = putIndex(); | |
| 211 | |
| 212 try | |
| 213 { | |
| 214 int len=0, total=0, available=max; | |
| 215 int loop=0; | |
| 216 while (total<max) | |
| 217 { | |
| 218 _buf.position(p); | |
| 219 _buf.limit(p+available); | |
| 220 len = _in.read(_buf); | |
| 221 if (len<0) | |
| 222 { | |
| 223 _in = null; | |
| 224 _inStream = in; | |
| 225 break; | |
| 226 } | |
| 227 else if (len>0) | |
| 228 { | |
| 229 p += len; | |
| 230 total += len; | |
| 231 available -= len; | |
| 232 setPutIndex(p); | |
| 233 loop=0; | |
| 234 } | |
| 235 else if (loop++>1) | |
| 236 break; | |
| 237 if (in.available()<=0) | |
| 238 break; | |
| 239 } | |
| 240 if (len<0 && total==0) | |
| 241 return -1; | |
| 242 return total; | |
| 243 | |
| 244 } | |
| 245 catch(IOException e) | |
| 246 { | |
| 247 _in = null; | |
| 248 _inStream = in; | |
| 249 throw e; | |
| 250 } | |
| 251 finally | |
| 252 { | |
| 253 if (_in!=null && !_in.isOpen()) | |
| 254 { | |
| 255 _in = null; | |
| 256 _inStream = in; | |
| 257 } | |
| 258 _buf.position(0); | |
| 259 _buf.limit(_buf.capacity()); | |
| 260 } | |
| 261 } | |
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262 |
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263 } |