import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
@SuppressWarnings("resource")
public void sendInitMessage(Socket socket, boolean isForOutgoing) throws IOException
{
    StreamInitMessage message = new StreamInitMessage(
            FBUtilities.getBroadcastAddress(),
            session.sessionIndex(),
            session.planId(),
            session.description(),
            isForOutgoing,
            session.keepSSTableLevel(),
            session.isIncremental());
    ByteBuffer messageBuf = message.createMessage(false, protocolVersion);
    DataOutputStreamPlus out = getWriteChannel(socket);
    out.write(messageBuf);
    out.flush();
}
 

import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
@Override
public void run()
{
    try
    {
        // streaming connections are per-session and have a fixed version.  we can't do anything with a wrong-version stream connection, so drop it.
        if (version != StreamMessage.CURRENT_VERSION)
            throw new IOException(String.format("Received stream using protocol version %d (my version %d). Terminating connection", version, MessagingService.current_version));

        DataInput input = new DataInputStream(socket.getInputStream());
        StreamInitMessage init = StreamInitMessage.serializer.deserialize(input, version);

        // The initiator makes two connections, one for incoming and one for outgoing.
        // The receiving side distinguish two connections by looking at StreamInitMessage#isForOutgoing.
        // Note: we cannot use the same socket for incoming and outgoing streams because we want to
        // parallelize said streams and the socket is blocking, so we might deadlock.
        StreamResultFuture.initReceivingSide(init.sessionIndex, init.planId, init.description, init.from, socket, init.isForOutgoing, version);
    }
    catch (IOException e)
    {
        logger.debug("IOException reading from socket; closing", e);
        try
        {
            socket.close();
        }
        catch (IOException e2)
        {
            logger.debug("error closing socket", e2);
        }
    }
}
 

import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
public void sendInitMessage(Socket socket, boolean isForOutgoing) throws IOException
{
    StreamInitMessage message = new StreamInitMessage(
            FBUtilities.getBroadcastAddress(),
            session.sessionIndex(),
            session.planId(),
            session.description(),
            isForOutgoing);
    ByteBuffer messageBuf = message.createMessage(false, protocolVersion);
    getWriteChannel(socket).write(messageBuf);
}
 

import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
@Override
public void run()
{
    try
    {
        // streaming connections are per-session and have a fixed version.  we can't do anything with a wrong-version stream connection, so drop it.
        if (version != StreamMessage.CURRENT_VERSION)
            throw new IOException(String.format("Received stream using protocol version %d (my version %d). Terminating connection", version, MessagingService.current_version));

        DataInput input = new DataInputStream(socket.getInputStream());
        StreamInitMessage init = StreamInitMessage.serializer.deserialize(input, version);

        // The initiator makes two connections, one for incoming and one for outgoing.
        // The receiving side distinguish two connections by looking at StreamInitMessage#isForOutgoing.
        // Note: we cannot use the same socket for incoming and outgoing streams because we want to
        // parallelize said streams and the socket is blocking, so we might deadlock.
        StreamResultFuture.initReceivingSide(init.planId, init.description, init.from, socket, init.isForOutgoing, version);
    }
    catch (IOException e)
    {
        logger.debug("IOException reading from socket; closing", e);
        try
        {
            socket.close();
        }
        catch (IOException e2)
        {
            logger.debug("error closing socket", e2);
        }
    }
}
 

import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
@Override
@SuppressWarnings("resource") // Not closing constructed DataInputPlus's as the stream needs to remain open.
public void run()
{
    try
    {
        // streaming connections are per-session and have a fixed version.
        // we can't do anything with a wrong-version stream connection, so drop it.
        if (version != StreamMessage.CURRENT_VERSION)
            throw new IOException(String.format("Received stream using protocol version %d (my version %d). Terminating connection", version, StreamMessage.CURRENT_VERSION));

        DataInputPlus input = new DataInputStreamPlus(socket.getInputStream());
        StreamInitMessage init = StreamInitMessage.serializer.deserialize(input, version);

        //Set SO_TIMEOUT on follower side
        if (!init.isForOutgoing)
            socket.setSoTimeout(DatabaseDescriptor.getStreamingSocketTimeout());

        // The initiator makes two connections, one for incoming and one for outgoing.
        // The receiving side distinguish two connections by looking at StreamInitMessage#isForOutgoing.
        // Note: we cannot use the same socket for incoming and outgoing streams because we want to
        // parallelize said streams and the socket is blocking, so we might deadlock.
        StreamResultFuture.initReceivingSide(init.sessionIndex, init.planId, init.description, init.from, this, init.isForOutgoing, version, init.keepSSTableLevel, init.isIncremental);
    }
    catch (IOException e)
    {
        logger.error(String.format("IOException while reading from socket from %s, closing: %s",
                                   socket.getRemoteSocketAddress(), e));
        close();
    }
}
 

import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
public void sendInitMessage(boolean isForOutgoing) throws IOException
{
    StreamInitMessage message = new StreamInitMessage(FBUtilities.getBroadcastAddress(), session.planId(), session.description(), isForOutgoing);
    getWriteChannel().write(message.createMessage(false, protocolVersion));
}
 

import org.apache.cassandra.streaming.messages.StreamInitMessage; //导入依赖的package包/类
public void sendInitMessage(Socket socket, boolean isForOutgoing) throws IOException
{
    StreamInitMessage message = new StreamInitMessage(FBUtilities.getBroadcastAddress(), session.planId(), session.description(), isForOutgoing);
    ByteBuffer messageBuf = message.createMessage(false, protocolVersion);
    getWriteChannel(socket).write(messageBuf);
}