Java Code Examples for io.netty.channel.Channel#config()

@Override
public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {
    Channel ch = ctx.channel();
    ChannelConfig config = ch.config();

    // 高水位线: ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK
    // 低水位线: ChannelOption.WRITE_BUFFER_LOW_WATER_MARK
    if (!ch.isWritable()) {
        // 当前channel的缓冲区(OutboundBuffer)大小超过了WRITE_BUFFER_HIGH_WATER_MARK
        if (logger.isWarnEnabled()) {
            logger.warn("{} is not writable, high water mask: {}, the number of flushed entries that are not written yet: {}.",
                    ch, config.getWriteBufferHighWaterMark(), ch.unsafe().outboundBuffer().size());
        }

        config.setAutoRead(false);
    } else {
        // 曾经高于高水位线的OutboundBuffer现在已经低于WRITE_BUFFER_LOW_WATER_MARK了
        if (logger.isWarnEnabled()) {
            logger.warn("{} is writable(rehabilitate), low water mask: {}, the number of flushed entries that are not written yet: {}.",
                    ch, config.getWriteBufferLowWaterMark(), ch.unsafe().outboundBuffer().size());
        }

        config.setAutoRead(true);
    }
}
 

@Override
public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {
    Channel ch = ctx.channel();
    ChannelConfig config = ch.config();

    // 高水位线: ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK
    // 低水位线: ChannelOption.WRITE_BUFFER_LOW_WATER_MARK
    if (!ch.isWritable()) {
        // 当前channel的缓冲区(OutboundBuffer)大小超过了WRITE_BUFFER_HIGH_WATER_MARK
        if (logger.isWarnEnabled()) {
            logger.warn("{} is not writable, high water mask: {}, the number of flushed entries that are not written yet: {}.",
                    ch, config.getWriteBufferHighWaterMark(), ch.unsafe().outboundBuffer().size());
        }

        config.setAutoRead(false);
    } else {
        // 曾经高于高水位线的OutboundBuffer现在已经低于WRITE_BUFFER_LOW_WATER_MARK了
        if (logger.isWarnEnabled()) {
            logger.warn("{} is writable(rehabilitate), low water mask: {}, the number of flushed entries that are not written yet: {}.",
                    ch, config.getWriteBufferLowWaterMark(), ch.unsafe().outboundBuffer().size());
        }

        config.setAutoRead(true);
    }
}
 

@Override
public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {
    Channel ch = ctx.channel();
    ChannelConfig config = ch.config();

    // 高水位线: ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK
    // 低水位线: ChannelOption.WRITE_BUFFER_LOW_WATER_MARK
    if (!ch.isWritable()) {
        // 当前channel的缓冲区(OutboundBuffer)大小超过了WRITE_BUFFER_HIGH_WATER_MARK
        if (logger.isWarnEnabled()) {
            logger.warn("{} is not writable, high water mask: {}, the number of flushed entries that are not written yet: {}.",
                    ch, config.getWriteBufferHighWaterMark(), ch.unsafe().outboundBuffer().size());
        }

        config.setAutoRead(false);
    } else {
        // 曾经高于高水位线的OutboundBuffer现在已经低于WRITE_BUFFER_LOW_WATER_MARK了
        if (logger.isWarnEnabled()) {
            logger.warn("{} is writable(rehabilitate), low water mask: {}, the number of flushed entries that are not written yet: {}.",
                    ch, config.getWriteBufferLowWaterMark(), ch.unsafe().outboundBuffer().size());
        }

        config.setAutoRead(true);
    }
}
 

static InternalChannelz.SocketOptions getSocketOptions(Channel channel) {
  ChannelConfig config = channel.config();
  InternalChannelz.SocketOptions.Builder b = new InternalChannelz.SocketOptions.Builder();

  // The API allows returning null but not sure if it can happen in practice.
  // Let's be paranoid and do null checking just in case.
  Integer lingerSeconds = config.getOption(SO_LINGER);
  if (lingerSeconds != null) {
    b.setSocketOptionLingerSeconds(lingerSeconds);
  }

  Integer timeoutMillis = config.getOption(SO_TIMEOUT);
  if (timeoutMillis != null) {
    // in java, SO_TIMEOUT only applies to receiving
    b.setSocketOptionTimeoutMillis(timeoutMillis);
  }

  for (Entry<ChannelOption<?>, Object> opt : config.getOptions().entrySet()) {
    ChannelOption<?> key = opt.getKey();
    // Constants are pooled, so there should only be one instance of each constant
    if (key.equals(SO_LINGER) || key.equals(SO_TIMEOUT)) {
      continue;
    }
    Object value = opt.getValue();
    // zpencer: Can a netty option be null?
    b.addOption(key.name(), String.valueOf(value));
  }

  NativeSocketOptions nativeOptions
      = NettySocketSupport.getNativeSocketOptions(channel);
  if (nativeOptions != null) {
    b.setTcpInfo(nativeOptions.tcpInfo); // may be null
    for (Entry<String, String> entry : nativeOptions.otherInfo.entrySet()) {
      b.addOption(entry.getKey(), entry.getValue());
    }
  }
  return b.build();
}
 

@Override
public void run() {
    Channel channel = ctx.channel();
    ChannelConfig config = channel.config();
    if (!config.isAutoRead() && isHandlerActive(ctx)) {
        // If AutoRead is False and Active is True, user make a direct setAutoRead(false)
        // Then Just reset the status
        if (logger.isDebugEnabled()) {
            logger.debug("Not unsuspend: " + config.isAutoRead() + ':' +
                    isHandlerActive(ctx));
        }
        channel.attr(READ_SUSPENDED).set(false);
    } else {
        // Anything else allows the handler to reset the AutoRead
        if (logger.isDebugEnabled()) {
            if (config.isAutoRead() && !isHandlerActive(ctx)) {
                logger.debug("Unsuspend: " + config.isAutoRead() + ':' +
                        isHandlerActive(ctx));
            } else {
                logger.debug("Normal unsuspend: " + config.isAutoRead() + ':'
                        + isHandlerActive(ctx));
            }
        }
        channel.attr(READ_SUSPENDED).set(false);
        config.setAutoRead(true);
        channel.read();
    }
    if (logger.isDebugEnabled()) {
        logger.debug("Unsuspend final status => " + config.isAutoRead() + ':'
                + isHandlerActive(ctx));
    }
}
 

static InternalChannelz.SocketOptions getSocketOptions(Channel channel) {
  ChannelConfig config = channel.config();
  InternalChannelz.SocketOptions.Builder b = new InternalChannelz.SocketOptions.Builder();

  // The API allows returning null but not sure if it can happen in practice.
  // Let's be paranoid and do null checking just in case.
  Integer lingerSeconds = config.getOption(SO_LINGER);
  if (lingerSeconds != null) {
    b.setSocketOptionLingerSeconds(lingerSeconds);
  }

  Integer timeoutMillis = config.getOption(SO_TIMEOUT);
  if (timeoutMillis != null) {
    // in java, SO_TIMEOUT only applies to receiving
    b.setSocketOptionTimeoutMillis(timeoutMillis);
  }

  for (Entry<ChannelOption<?>, Object> opt : config.getOptions().entrySet()) {
    ChannelOption<?> key = opt.getKey();
    // Constants are pooled, so there should only be one instance of each constant
    if (key.equals(SO_LINGER) || key.equals(SO_TIMEOUT)) {
      continue;
    }
    Object value = opt.getValue();
    // zpencer: Can a netty option be null?
    b.addOption(key.name(), String.valueOf(value));
  }

  NativeSocketOptions nativeOptions
      = NettySocketSupport.getNativeSocketOptions(channel);
  if (nativeOptions != null) {
    b.setTcpInfo(nativeOptions.tcpInfo); // may be null
    for (Entry<String, String> entry : nativeOptions.otherInfo.entrySet()) {
      b.addOption(entry.getKey(), entry.getValue());
    }
  }
  return b.build();
}
 

private InboundTrafficController(@Nullable Channel channel, int highWatermark, int lowWatermark) {
    cfg = channel != null ? channel.config() : null;
    this.highWatermark = highWatermark;
    this.lowWatermark = lowWatermark;
}