Method run

java/libraries/net/src/processing/net/Client.java:220–305

()

  @Override
  public void run() {
    byte[] readBuffer;
    { // make the read buffer same size as socket receive buffer so that
      // we don't waste cycles calling listeners when there is more data waiting
      int readBufferSize = 1 << 16; // 64 KB (default socket receive buffer size)
      try {
        readBufferSize = socket.getReceiveBufferSize();
      } catch (SocketException ignore) { }
      readBuffer = new byte[readBufferSize];
    }
    while (Thread.currentThread() == thread) {
      try {
        while (input != null) {
          int readCount;

          // try to read a byte using a blocking read. 
          // An exception will occur when the sketch is exits.
          try {
            readCount = input.read(readBuffer, 0, readBuffer.length);
          } catch (SocketException e) {
             System.err.println("Client SocketException: " + e.getMessage());
             // the socket had a problem reading so don't try to read from it again.
             stop();
             return;
          }
        
          // read returns -1 if end-of-stream occurs (for example if the host disappears)
          if (readCount == -1) {
            System.err.println("Client got end-of-stream.");
            stop();
            return;
          }

          synchronized (bufferLock) {
            int freeBack = buffer.length - bufferLast;
            if (readCount > freeBack) {
              // not enough space at the back
              int bufferLength = bufferLast - bufferIndex;
              byte[] targetBuffer = buffer;
              if (bufferLength + readCount > buffer.length) {
                // can't fit even after compacting, resize the buffer
                // find the next power of two which can fit everything in
                int newSize = Integer.highestOneBit(bufferLength + readCount - 1) << 1;
                if (newSize > MAX_BUFFER_SIZE) {
                  // buffer is full because client is not reading (fast enough)
                  System.err.println("Client: can't receive more data, buffer is full. " +
                                         "Make sure you read the data from the client.");
                  stop();
                  return;
                }
                targetBuffer = new byte[newSize];
              }
              // compact the buffer (either in-place or into the new bigger buffer)
              System.arraycopy(buffer, bufferIndex, targetBuffer, 0, bufferLength);
              bufferLast -= bufferIndex;
              bufferIndex = 0;
              buffer = targetBuffer;