src/share/classes/java/net/SocketInputStream.java

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rev 5501 : imported patch io-trace


  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.net;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.FileInputStream;
  30 import java.io.IOException;
  31 import java.nio.channels.FileChannel;
  32 

  33 import sun.net.ConnectionResetException;
  34 
  35 /**
  36  * This stream extends FileInputStream to implement a
  37  * SocketInputStream. Note that this class should <b>NOT</b> be
  38  * public.
  39  *
  40  * @author      Jonathan Payne
  41  * @author      Arthur van Hoff
  42  */
  43 class SocketInputStream extends FileInputStream
  44 {
  45     static {
  46         init();
  47     }
  48 
  49     private boolean eof;
  50     private AbstractPlainSocketImpl impl = null;
  51     private byte temp[];
  52     private Socket socket = null;


 105      */
 106     public int read(byte b[]) throws IOException {
 107         return read(b, 0, b.length);
 108     }
 109 
 110     /**
 111      * Reads into a byte array <i>b</i> at offset <i>off</i>,
 112      * <i>length</i> bytes of data.
 113      * @param b the buffer into which the data is read
 114      * @param off the start offset of the data
 115      * @param len the maximum number of bytes read
 116      * @return the actual number of bytes read, -1 is
 117      *          returned when the end of the stream is reached.
 118      * @exception IOException If an I/O error has occurred.
 119      */
 120     public int read(byte b[], int off, int length) throws IOException {
 121         return read(b, off, length, impl.getTimeout());
 122     }
 123 
 124     int read(byte b[], int off, int length, int timeout) throws IOException {
 125         int n;
 126 
 127         // EOF already encountered
 128         if (eof) {
 129             return -1;
 130         }
 131 
 132         // connection reset
 133         if (impl.isConnectionReset()) {
 134             throw new SocketException("Connection reset");
 135         }
 136 
 137         // bounds check
 138         if (length <= 0 || off < 0 || off + length > b.length) {
 139             if (length == 0) {
 140                 return 0;
 141             }
 142             throw new ArrayIndexOutOfBoundsException();
 143         }
 144 
 145         boolean gotReset = false;
 146 

 147         // acquire file descriptor and do the read
 148         FileDescriptor fd = impl.acquireFD();
 149         try {
 150             n = socketRead0(fd, b, off, length, timeout);
 151             if (n > 0) {
 152                 return n;
 153             }
 154         } catch (ConnectionResetException rstExc) {
 155             gotReset = true;
 156         } finally {
 157             impl.releaseFD();

 158         }
 159 
 160         /*
 161          * We receive a "connection reset" but there may be bytes still
 162          * buffered on the socket
 163          */
 164         if (gotReset) {

 165             impl.setConnectionResetPending();
 166             impl.acquireFD();
 167             try {
 168                 n = socketRead0(fd, b, off, length, timeout);
 169                 if (n > 0) {
 170                     return n;
 171                 }
 172             } catch (ConnectionResetException rstExc) {
 173             } finally {
 174                 impl.releaseFD();

 175             }
 176         }
 177 
 178         /*
 179          * If we get here we are at EOF, the socket has been closed,
 180          * or the connection has been reset.
 181          */
 182         if (impl.isClosedOrPending()) {
 183             throw new SocketException("Socket closed");
 184         }
 185         if (impl.isConnectionResetPending()) {
 186             impl.setConnectionReset();
 187         }
 188         if (impl.isConnectionReset()) {
 189             throw new SocketException("Connection reset");
 190         }
 191         eof = true;
 192         return -1;
 193     }
 194 




  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.net;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.FileInputStream;
  30 import java.io.IOException;
  31 import java.nio.channels.FileChannel;
  32 
  33 import sun.misc.IoTrace;
  34 import sun.net.ConnectionResetException;
  35 
  36 /**
  37  * This stream extends FileInputStream to implement a
  38  * SocketInputStream. Note that this class should <b>NOT</b> be
  39  * public.
  40  *
  41  * @author      Jonathan Payne
  42  * @author      Arthur van Hoff
  43  */
  44 class SocketInputStream extends FileInputStream
  45 {
  46     static {
  47         init();
  48     }
  49 
  50     private boolean eof;
  51     private AbstractPlainSocketImpl impl = null;
  52     private byte temp[];
  53     private Socket socket = null;


 106      */
 107     public int read(byte b[]) throws IOException {
 108         return read(b, 0, b.length);
 109     }
 110 
 111     /**
 112      * Reads into a byte array <i>b</i> at offset <i>off</i>,
 113      * <i>length</i> bytes of data.
 114      * @param b the buffer into which the data is read
 115      * @param off the start offset of the data
 116      * @param len the maximum number of bytes read
 117      * @return the actual number of bytes read, -1 is
 118      *          returned when the end of the stream is reached.
 119      * @exception IOException If an I/O error has occurred.
 120      */
 121     public int read(byte b[], int off, int length) throws IOException {
 122         return read(b, off, length, impl.getTimeout());
 123     }
 124 
 125     int read(byte b[], int off, int length, int timeout) throws IOException {
 126         int n = 0;
 127 
 128         // EOF already encountered
 129         if (eof) {
 130             return -1;
 131         }
 132 
 133         // connection reset
 134         if (impl.isConnectionReset()) {
 135             throw new SocketException("Connection reset");
 136         }
 137 
 138         // bounds check
 139         if (length <= 0 || off < 0 || off + length > b.length) {
 140             if (length == 0) {
 141                 return 0;
 142             }
 143             throw new ArrayIndexOutOfBoundsException();
 144         }
 145 
 146         boolean gotReset = false;
 147 
 148         Object traceContext = IoTrace.socketReadBegin(impl.address, impl.port, timeout);
 149         // acquire file descriptor and do the read
 150         FileDescriptor fd = impl.acquireFD();
 151         try {
 152             n = socketRead0(fd, b, off, length, timeout);
 153             if (n > 0) {
 154                 return n;
 155             }
 156         } catch (ConnectionResetException rstExc) {
 157             gotReset = true;
 158         } finally {
 159             impl.releaseFD();
 160             IoTrace.socketReadEnd(traceContext, n > 0 ? n : 0);
 161         }
 162 
 163         /*
 164          * We receive a "connection reset" but there may be bytes still
 165          * buffered on the socket
 166          */
 167         if (gotReset) {
 168             traceContext = IoTrace.socketReadBegin(impl.address, impl.port, timeout);
 169             impl.setConnectionResetPending();
 170             impl.acquireFD();
 171             try {
 172                 n = socketRead0(fd, b, off, length, timeout);
 173                 if (n > 0) {
 174                     return n;
 175                 }
 176             } catch (ConnectionResetException rstExc) {
 177             } finally {
 178                 impl.releaseFD();
 179                 IoTrace.socketReadEnd(traceContext, n > 0 ? n : 0);
 180             }
 181         }
 182 
 183         /*
 184          * If we get here we are at EOF, the socket has been closed,
 185          * or the connection has been reset.
 186          */
 187         if (impl.isClosedOrPending()) {
 188             throw new SocketException("Socket closed");
 189         }
 190         if (impl.isConnectionResetPending()) {
 191             impl.setConnectionReset();
 192         }
 193         if (impl.isConnectionReset()) {
 194             throw new SocketException("Connection reset");
 195         }
 196         eof = true;
 197         return -1;
 198     }
 199