Java SocketOptions.TCP_NODELAY属性代码示例

@Override
public Object getOption(int optID) throws SocketException {
    if (optID == SocketOptions.SO_TIMEOUT) {
        return Integer.valueOf(receiveTimeout);
    } else if (optID == SocketOptions.IP_TOS) {
        return Integer.valueOf(trafficClass);
    } else {
        // Call the native first so there will be
        // an exception if the socket if closed.
        Object result = netImpl.getSocketOption(fd, optID);
        if (optID == SocketOptions.TCP_NODELAY
                && (netImpl.getSocketFlags() & TCP_NODELAY) != 0) {
            return Boolean.valueOf(tcpNoDelay);
        }
        return result;
    }
}
 

public Object getOption(int key) throws SocketException {
    if (key==SocketOptions.SO_TIMEOUT) {
        // get timeout
        return inputStreamTimeout;
    }
    if (key==SocketOptions.TCP_NODELAY) {
        return tcpNodelay;
    }
    if (key==SocketOptions.SO_LINGER) {
        // get timeout
        return soLinger;
    }
    
    // unsupported option
    String msg = "no implementation for getOption("+key+"). List of all options in java.net.SocketOptions.";
    if (log.isLoggable(Level.FINER)) {
        log.log(Level.FINER, msg, new Throwable("method not completely implemented"));
    } else {
        log.info(msg+" - Log with level=FINER to get call hierarchy.");
    }
    return null;
}
 

/**
 * Get a socket option. This implementation is only required to support
 * socket options that are boolean values, which include:
 *
 *  SocketOptions.IP_MULTICAST_LOOP
 *  SocketOptions.SO_BROADCAST
 *  SocketOptions.SO_KEEPALIVE
 *  SocketOptions.SO_OOBINLINE
 *  SocketOptions.SO_REUSEADDR
 *  SocketOptions.TCP_NODELAY
 *
 * and socket options that are integer values, which include:
 *
 *  SocketOptions.IP_TOS
 *  SocketOptions.SO_LINGER
 *  SocketOptions.SO_RCVBUF
 *  SocketOptions.SO_SNDBUF
 *  SocketOptions.SO_TIMEOUT
 *
 * @param optionId The option ID to fetch.
 * @return A {@link Boolean} or {@link Integer} containing the socket
 *  option.
 * @throws SocketException
 */
public Object getOption(int optionId) throws SocketException
{
  int value;
  try
    {
      value = getOption(nfd.getNativeFD(), optionId);
    }
  catch (IOException ioe)
    {
      SocketException se = new SocketException();
      se.initCause(ioe);
      throw se;
    }

  switch (optionId)
    {
      case SocketOptions.IP_MULTICAST_LOOP:
      case SocketOptions.SO_BROADCAST:
      case SocketOptions.SO_KEEPALIVE:
      case SocketOptions.SO_OOBINLINE:
      case SocketOptions.SO_REUSEADDR:
      case SocketOptions.TCP_NODELAY:
        return Boolean.valueOf(value != 0);

      case SocketOptions.IP_TOS:
      case SocketOptions.SO_LINGER:
      case SocketOptions.SO_RCVBUF:
      case SocketOptions.SO_SNDBUF:
      case SocketOptions.SO_TIMEOUT:
        return new Integer(value);

      default:
        throw new SocketException("getting option " + optionId +
                                  " not supported here");
    }
}
 

/**
 * Get a socket option. This implementation is only required to support
 * socket options that are boolean values, which include:
 * 
 *  SocketOptions.IP_MULTICAST_LOOP
 *  SocketOptions.SO_BROADCAST
 *  SocketOptions.SO_KEEPALIVE
 *  SocketOptions.SO_OOBINLINE
 *  SocketOptions.SO_REUSEADDR
 *  SocketOptions.TCP_NODELAY
 * 
 * and socket options that are integer values, which include:
 * 
 *  SocketOptions.IP_TOS
 *  SocketOptions.SO_LINGER
 *  SocketOptions.SO_RCVBUF
 *  SocketOptions.SO_SNDBUF
 *  SocketOptions.SO_TIMEOUT
 *
 * @param optionId The option ID to fetch.
 * @return A {@link Boolean} or {@link Integer} containing the socket
 *  option.
 * @throws SocketException
 */
public Object getOption(int optionId) throws SocketException
{
  int value;
  try
    {
      value = getOption(nfd.getNativeFD(), optionId);
    }
  catch (IOException ioe)
    {
      SocketException se = new SocketException();
      se.initCause(ioe);
      throw se;
    }
  
  switch (optionId)
    {
      case SocketOptions.IP_MULTICAST_LOOP:
      case SocketOptions.SO_BROADCAST:
      case SocketOptions.SO_KEEPALIVE:
      case SocketOptions.SO_OOBINLINE:
      case SocketOptions.SO_REUSEADDR:
      case SocketOptions.TCP_NODELAY:
        return Boolean.valueOf(value != 0);
        
      case SocketOptions.IP_TOS:
      case SocketOptions.SO_LINGER:
      case SocketOptions.SO_RCVBUF:
      case SocketOptions.SO_SNDBUF:
      case SocketOptions.SO_TIMEOUT:
        return new Integer(value);
        
      default:
        throw new SocketException("getting option " + optionId +
                                  " not supported here");
    }
}
 

@Override
public Object getOption(final int key) throws SocketException
{
	if (key == SocketOptions.SO_TIMEOUT)
	{
		// get timeout
		return inputStreamTimeout;
	}
	if (key == SocketOptions.TCP_NODELAY)
	{
		return tcpNodelay;
	}
	if (key == SocketOptions.SO_LINGER)
	{
		// get timeout
		return soLinger;
	}

	// unsupported option
	final String msg = "no implementation for getOption(" + key
			+ "). List of all options in java.net.SocketOptions.";
	if (logger.isDebugEnabled())
	{
		logger.debug(msg, new Throwable("method not completely implemented"));
	}
	else
	{
		logger.info(msg + " - Log with level=debug to get call hierarchy.");
	}
	return null;
}
 

@Override
public void setOption(int optID, Object val) throws SocketException {
    if (optID == SocketOptions.SO_TIMEOUT) {
        receiveTimeout = ((Integer) val).intValue();
    } else {
        try {
            netImpl.setSocketOption(fd, optID, val);
            if (optID == SocketOptions.TCP_NODELAY
                    && (netImpl.getSocketFlags() & TCP_NODELAY) != 0) {
                tcpNoDelay = ((Boolean) val).booleanValue();
            }
        } catch (SocketException e) {
            // we don't throw an exception for IP_TOS even if the platform
            // won't let us set the requested value
            if (optID != SocketOptions.IP_TOS) {
                throw e;
            }
        }

        /*
         * save this value as it is actually used differently for IPv4 and
         * IPv6 so we cannot get the value using the getOption. The option
         * is actually only set for IPv4 and a masked version of the value
         * will be set as only a subset of the values are allowed on the
         * socket. Therefore we need to retain it to return the value that
         * was set. We also need the value to be passed into a number of
         * natives so that it can be used properly with IPv6
         */
        if (optID == SocketOptions.IP_TOS) {
            trafficClass = ((Integer) val).intValue();
        }
    }
}
 

public Object getOption(int optID) throws SocketException {
	if(optID == SocketOptions.SO_LINGER) {
		return 0;
	} else if(optID == SocketOptions.TCP_NODELAY) {
		return Boolean.TRUE;
	} else if(optID == SocketOptions.SO_TIMEOUT) {
		return 0;
	} else {
		return 0;
	}
}
 

@Override
public void setOption(int optID, Object value) throws SocketException {
  try {
    super.setOption(optID, value);
  } catch (SocketException e) {
    switch (optID) {
      case SocketOptions.TCP_NODELAY:
        return;
      default:
        throw e;
    }
  }
}
 

@Override
public Object getOption(int optID) throws SocketException {
  try {
    return super.getOption(optID);
  } catch (SocketException e) {
    switch (optID) {
      case SocketOptions.TCP_NODELAY:
      case SocketOptions.SO_KEEPALIVE:
        return false;
      default:
        throw e;
    }
  }
}
 

private static Object getSocketOptionErrno(FileDescriptor fd, int option) throws ErrnoException, SocketException {
    switch (option) {
    case SocketOptions.IP_MULTICAST_IF:
        // This is IPv4-only.
        return Libcore.os.getsockoptInAddr(fd, IPPROTO_IP, IP_MULTICAST_IF);
    case SocketOptions.IP_MULTICAST_IF2:
        // This is IPv6-only.
        return Libcore.os.getsockoptInt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF);
    case SocketOptions.IP_MULTICAST_LOOP:
        // Since setting this from java.net always sets IPv4 and IPv6 to the same value,
        // it doesn't matter which we return.
        return booleanFromInt(Libcore.os.getsockoptInt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP));
    case IoBridge.JAVA_IP_MULTICAST_TTL:
        // Since setting this from java.net always sets IPv4 and IPv6 to the same value,
        // it doesn't matter which we return.
        return Libcore.os.getsockoptInt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS);
    case SocketOptions.IP_TOS:
        // Since setting this from java.net always sets IPv4 and IPv6 to the same value,
        // it doesn't matter which we return.
        return Libcore.os.getsockoptInt(fd, IPPROTO_IPV6, IPV6_TCLASS);
    case SocketOptions.SO_BROADCAST:
        return booleanFromInt(Libcore.os.getsockoptInt(fd, SOL_SOCKET, SO_BROADCAST));
    case SocketOptions.SO_KEEPALIVE:
        return booleanFromInt(Libcore.os.getsockoptInt(fd, SOL_SOCKET, SO_KEEPALIVE));
    case SocketOptions.SO_LINGER:
        StructLinger linger = Libcore.os.getsockoptLinger(fd, SOL_SOCKET, SO_LINGER);
        if (!linger.isOn()) {
            return false;
        }
        return linger.l_linger;
    case SocketOptions.SO_OOBINLINE:
        return booleanFromInt(Libcore.os.getsockoptInt(fd, SOL_SOCKET, SO_OOBINLINE));
    case SocketOptions.SO_RCVBUF:
        return Libcore.os.getsockoptInt(fd, SOL_SOCKET, SO_RCVBUF);
    case SocketOptions.SO_REUSEADDR:
        return booleanFromInt(Libcore.os.getsockoptInt(fd, SOL_SOCKET, SO_REUSEADDR));
    case SocketOptions.SO_SNDBUF:
        return Libcore.os.getsockoptInt(fd, SOL_SOCKET, SO_SNDBUF);
    case SocketOptions.SO_TIMEOUT:
        return (int) Libcore.os.getsockoptTimeval(fd, SOL_SOCKET, SO_RCVTIMEO).toMillis();
    case SocketOptions.TCP_NODELAY:
        return booleanFromInt(Libcore.os.getsockoptInt(fd, IPPROTO_TCP, TCP_NODELAY));
    default:
        throw new SocketException("Unknown socket option: " + option);
    }
}
 

@Override
public synchronized void setOption(final int key, final Object value)
		throws SocketException
{
	logger.debug("setOption(key={},value={})", key, value);
	if (key == SocketOptions.SO_TIMEOUT)
	{
		// set timeout
		if (value instanceof Integer)
		{
			inputStreamTimeout = (Integer) value;
			if (inputStream != null)
			{
				inputStream.setTimeout(inputStreamTimeout);
			}
		}
		else
		{
			logger.warn("ignored value of wrong type of setOption(key={}"
					+ ",value={}"
					+ "). List of all options in java.net.SocketOptions.", key, value);
		}
		return;
	}
	if (key == SocketOptions.TCP_NODELAY)
	{
		// ignore the value but keep it for later get operations
		if (value instanceof Boolean)
		{
			tcpNodelay = (Boolean) value;
		}
		else
		{
			logger.warn("ignored value of wrong type of setOption(key={}"
					+ ",value={}). List of all options in java.net.SocketOptions.", key, value);
		}
		return;
	}
	if (key == SocketOptions.SO_TIMEOUT)
	{
		// ignore the value but keep it for later get operations
		if (value instanceof Integer)
		{
			soLinger = (Integer) value;
		}
		else
		{
			logger.warn("ignored value of wrong type of setOption(key={}"
					+ ",value={}). List of all options in java.net.SocketOptions.", key, value);
		}
		return;
	}

	// unsupported option
	final String msg = "no implementation for setOption(key=" + key
			+ ",value=" + value
			+ "). List of all options in java.net.SocketOptions.";
	if (logger.isDebugEnabled())
	{
		logger.debug(msg, new Throwable("method not completely implemented"));
	}
	else
	{
		logger.warn(msg + " Log with level=debug to get call hierarchy.");
	}
}
 

public synchronized void setOption(int key, Object value) throws SocketException {
    log.fine("setOption(key="+key+",value="+value+")");
    if (key==SocketOptions.SO_TIMEOUT) {
        // set timeout
        if (value instanceof Integer) {
            inputStreamTimeout = (Integer)value;
            if (inputStream!=null) {
                inputStream.setTimeout(inputStreamTimeout);
            }
        } else {
            log.warning("ignored value of wrong type of setOption(key="+key+",value="+value+"). List of all options in java.net.SocketOptions.");
        }
        return;
    }
    if (key==SocketOptions.TCP_NODELAY) {
        // ignore the value but keep it for later get operations
        if (value instanceof Boolean) {
            tcpNodelay = (Boolean)value;
        } else {
            log.warning("ignored value of wrong type of setOption(key="+key+",value="+value+"). List of all options in java.net.SocketOptions.");
        }
        return;
    }
    if (key==SocketOptions.SO_TIMEOUT) {
        // ignore the value but keep it for later get operations
        if (value instanceof Integer) {
            soLinger = (Integer)value;
        } else {
            log.warning("ignored value of wrong type of setOption(key="+key+",value="+value+"). List of all options in java.net.SocketOptions.");
        }
        return;
    }
    
    // unsupported option
    String msg = "no implementation for setOption(key="+key+",value="+value+"). List of all options in java.net.SocketOptions.";
    if (log.isLoggable(Level.FINE)) {
        log.log(Level.FINE, msg, new Throwable("method not completely implemented"));
    } else {
        log.warning(msg+" Log with level=FINE to get call hierarchy.");
    }
}