Examples of com.caucho.vfs.WriteStream

com.caucho.vfs.WriteStream
A fast bufferered output stream supporting both character and byte data. The underlying stream sources are provided by StreamImpl classes, so all streams have the same API regardless of the underlying implementation.
OutputStream and Writers are combined. The write routines write bytes and the print routines write characters.
Most applications will use the Path routines to create their own streams. Specialized applications, like servers, need the capability of recycling streams.

      Thread thread = Thread.currentThread();
      thread.setName("watchdog-process-log-" + _pid + "-" + _id);


      thread.setContextClassLoader(ClassLoader.getSystemClassLoader());
      
      WriteStream out = _out;


      try {
        int len;


        byte []data = new byte[4096];


        while ((len = _is.read(data, 0, data.length)) > 0) {
          out.write(data, 0, len);
          out.flush();
        }
      } catch (Throwable e) {
        log.log(Level.WARNING, e.toString(), e);
      } finally {
        try {
          if (! _watchdog.isConsole()) {
            synchronized (out) {
              out.close();
            }
          }
        } catch (IOException e) {
        }

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    try {
      os = new TempOutputStream();


      Sha256OutputStream mOut = new Sha256OutputStream(os);


      WriteStream out = Vfs.openWrite(mOut);


      out.writeStream(is);


      out.close();


      mOut.close();


      byte[] hash = mOut.getDigest();

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    TempOutputStream os = null;


    try {
      os = new TempOutputStream();


      WriteStream out = Vfs.openWrite(os);


      if (! getDataBacking().loadData(valueKey, out)) {
        if (! loadClusterData(valueKey, flags)) {
          log.warning(this + " cannot load data for " + valueKey + " from triad");
          
          out.close();
        
          return null;
        }


        if (! getDataBacking().loadData(valueKey, out)) {
          out.close();
        
          return null;
        }
      }


      out.close();


      InputStream is = os.openInputStream();


      try {
        InflaterInputStream gzIn = new InflaterInputStream(is);

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    throws IOException
  {
    if (valueKey == null || valueKey == HashManager.NULL)
      throw new IllegalStateException(L.l("readData may not be called with a null value"));


    WriteStream out = Vfs.openWrite(os);


    try {
      if (getDataBacking().loadData(valueKey, out))
        return true;


      if (! loadClusterData(valueKey, flags)) {
        log.warning(this + " cannot load cluster value " + valueKey);


        // XXX: error?  since we have the value key, it should exist


        return false;
      }


      if (getDataBacking().loadData(valueKey, out)) {
        return true;
      }


      log.warning(this + " unexpected load failure in readValue " + valueKey);


      // XXX: error?  since we have the value key, it should exist


      return false;
    } finally {
      out.close();
    }
  }

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  private boolean scanHeaders()
    throws IOException
  {
    boolean isLoggable = log.isLoggable(Level.FINE);
    ReadStream is = getRawRead();
    WriteStream os = getRawWrite();
    CharBuffer cb = getCharBuffer();
    int code;
    int len;


    while (true) {
      _rawWrite.flush();


      code = is.read();


      Server server = getServer();
      if (server == null || server.isDestroyed()) {
        log.fine(dbgId() + " request after server close");
        killKeepalive("after server close");
        return false;
      }


      switch (code) {
      case -1:
        if (isLoggable)
          log.fine(dbgId() + "r: end of file");
        _filter.setClientClosed(true);
        killKeepalive("hmux end of file");
        return false;


      case HMUX_CHANNEL:
        int channel = (is.read() << 8) + is.read();


        if (isLoggable)
          log.fine(dbgId() + "channel-r " + channel);
        break;


      case HMUX_YIELD:
        if (log.isLoggable(Level.FINER))
          log.finer(dbgId() + (char) code + "-r: yield");


        os.write(HMUX_ACK);
        os.write(0);
        os.write(0);
        os.flush();
        break;


      case HMUX_QUIT:
        if (isLoggable)
          log.fine(dbgId() + (char) code + "-r: end of request");

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  }


  void writeFlush()
    throws IOException
  {
    WriteStream out = _rawWrite;


    synchronized (out) {
      out.flush();
    }
  }

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  }


  protected void flushNextBuffer()
    throws IOException
  {
    WriteStream next = _rawWrite;


    if (log.isLoggable(Level.FINE))
      log.fine(dbgId() + "flush()");


    int startOffset = _bufferStartOffset;


    if (startOffset > 0) {
      _bufferStartOffset = 0;
      if (startOffset == next.getBufferOffset()) {
        next.setBufferOffset(startOffset - 3);
      }
      else {
        // illegal state because the data isn't filled
        throw new IllegalStateException();
      }

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  }


  protected void writeTail()
    throws IOException
  {
    WriteStream next = _rawWrite;


    int offset = next.getBufferOffset();


    offset = fillDataBuffer(offset);


    // server/26a6
    // Use setBufferOffset because nextBuffer would
    // force an early flush
    next.setBufferOffset(offset);
  }

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  void writeString(int code, String value)
    throws IOException
  {
    int len = value.length();


    WriteStream os = _rawWrite;


    os.write(code);
    os.write(len >> 8);
    os.write(len);
    os.print(value);


    if (log.isLoggable(Level.FINE))
      log.fine(dbgId() + (char)code + "-w " + value);
  }

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  void writeString(int code, CharBuffer cb)
    throws IOException
  {
    int len = cb.length();


    WriteStream os = _rawWrite;


    os.write(code);
    os.write(len >> 8);
    os.write(len);
    os.print(cb.getBuffer(), 0, len);


    if (log.isLoggable(Level.FINE))
      log.fine(dbgId() + (char)code + "-w: " + cb);
  }

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