/// <summary>
/// Stores all Remoting responses.
/// </summary>
/// <param name="hdr">Header contain response.</param>
private void handleRemotingResponse(StackHeader hdr)
{
hdr.deserializeResponse(currentMethodCall);
IMessage resp = hdr.Message;
lock (remotingResponses)
{
remotingResponses.Add(resp);
Monitor.Pulse(remotingResponses);
}
}
/// <summary>
/// Sends request into infrastructure, then passes back result.
/// </summary>
/// <param name="hdr">Header contain request.</param>
private void handleRemotingRequest(StackHeader hdr)
{
IMessage responseMsg;
ITransportHeaders responseHeaders;
Stream responseStream;
IMessage req = hdr.Message;
ServerChannelSinkStack sinkStack = new ServerChannelSinkStack();
ProcessMessage(sinkStack, req, null, null, out responseMsg, out responseHeaders, out responseStream);
//send response back down the stack
Address dest = hdr.Source;
Message remotingMsg = new Message(dest, local_addr, null);
StackHeader rspHdr = new StackHeader(StackHeader.REMOTE_RSP, responseMsg, "");
remotingMsg.putHeader(name, rspHdr);
down(new Event(Event.MSG, remotingMsg));
}
/// <summary>
/// Stores all Remoting responses.
/// </summary>
/// <param name="hdr">Header contain response.</param>
private void handleRemotingResponse(StackHeader hdr)
{
hdr.deserializeResponse(currentMethodCall);
IMessage resp = hdr.Message;
lock(remotingResponses)
{
remotingResponses.Add(resp);
Monitor.Pulse(remotingResponses);
}
}
/// <summary>
/// Sends request into infrastructure, then passes back result.
/// </summary>
/// <param name="hdr">Header contain request.</param>
private void handleRemotingRequest(StackHeader hdr)
{
IMessage responseMsg;
ITransportHeaders responseHeaders;
Stream responseStream;
IMessage req = hdr.Message;
ServerChannelSinkStack sinkStack = new ServerChannelSinkStack();
ProcessMessage(sinkStack,req,null,null,out responseMsg,out responseHeaders,out responseStream);
//send response back down the stack
Address dest = hdr.Source;
Message remotingMsg = new Message(dest,local_addr,null);
StackHeader rspHdr = new StackHeader(StackHeader.REMOTE_RSP,responseMsg, "");
remotingMsg.putHeader(name,rspHdr);
down(new Event(Event.MSG,remotingMsg));
}
/// <remarks>
/// The Remoting call is packaged as a message and sent to all group members.
/// The response will be choosen using a chooser if present otherwise the
/// response with the most 'votes' will be chosen.
/// </remarks>
/// <summary>
/// Processes the Remoting call.
/// </summary>
/// <param name="msg"></param>
/// <returns></returns>
public IMessage SyncProcessMessage(IMessage msg)
{
IMethodCallMessage mcm = msg as IMethodCallMessage;
currentMethodCall = mcm;
IMessage retMsg = null;
long time_to_wait;
long start_time;
try
{
Address dest = null;;
if (objectURI == null)
return null;
if (channelURI != null)
{
String ip = "";
int port = 0;
int startpos = (channelURI.IndexOf("//")+2);
int endpos = (channelURI.IndexOf(":",startpos));
ip = channelURI.Substring(startpos,endpos-startpos);
if(String.Compare(ip,"null")==0)
dest = null;
else
{
++endpos;
string tmpPort = channelURI.Substring(endpos,channelURI.Length-endpos);
port = Convert.ToInt32(tmpPort);
dest = new Address(ip, port);
}
}
if(dest!=null && !members.Contains(dest))
throw new Exception("Remoting request cannot be sent to non-member");
Message remotingMsg = new Message(dest,null,null);
StackHeader hdr = new StackHeader(StackHeader.REMOTE_REQ,mcm,objectURI);
remotingMsg.putHeader(name,hdr);
remotingResponses.Clear();
down(new Event(Event.MSG,remotingMsg));
lock(remotingResponses)
{
start_time = System.Environment.TickCount;
time_to_wait = remotingTimeout;
int responsesDesired = 1;
if(dest==null)
responsesDesired = members.Count;
while(remotingResponses.Count < responsesDesired && time_to_wait > 0)
{
if(Trace.trace)
Trace.info(name + ".SyncProcessMessage()", "waiting for responses: time_to_wait=" + time_to_wait +
", got " + remotingResponses.Count + "|"+ responsesDesired + " rsps");
Monitor.Wait(remotingResponses, (int)time_to_wait, true);
time_to_wait -= System.Environment.TickCount - start_time;
}
if(Trace.trace)
Trace.info(name + ".SyncProcessMessage()", "No longer waiting for responses as Initial Members = " + remotingResponses.Count + "|" +responsesDesired + " TimeToWait = " + time_to_wait );
retMsg = determineResponse();
if (retMsg ==null)
throw new NullReferenceException("No remoting response to request");
}
}
catch (Exception e)
{
if(Trace.trace)
Trace.error(name + ".SyncProcessMessage()", "General error occured: " + e + "/n" + e.StackTrace);
retMsg = new ReturnMessage(e, mcm);
}
currentMethodCall = null;
return retMsg;
}
/// <remarks>
/// The Remoting call is packaged as a message and sent to all group members.
/// The response will be choosen using a chooser if present otherwise the
/// response with the most 'votes' will be chosen.
/// </remarks>
/// <summary>
/// Processes the Remoting call.
/// </summary>
/// <param name="msg"></param>
/// <returns></returns>
public IMessage SyncProcessMessage(IMessage msg)
{
IMethodCallMessage mcm = msg as IMethodCallMessage;
currentMethodCall = mcm;
IMessage retMsg = null;
long time_to_wait;
long start_time;
try
{
Address dest = null;;
if (objectURI == null)
{
return(null);
}
if (channelURI != null)
{
String ip = "";
int port = 0;
int startpos = (channelURI.IndexOf("//") + 2);
int endpos = (channelURI.IndexOf(":", startpos));
ip = channelURI.Substring(startpos, endpos - startpos);
if (String.Compare(ip, "null") == 0)
{
dest = null;
}
else
{
++endpos;
string tmpPort = channelURI.Substring(endpos, channelURI.Length - endpos);
port = Convert.ToInt32(tmpPort);
dest = new Address(ip, port);
}
}
if (dest != null && !members.Contains(dest))
{
throw new Exception("Remoting request cannot be sent to non-member");
}
Message remotingMsg = new Message(dest, null, null);
StackHeader hdr = new StackHeader(StackHeader.REMOTE_REQ, mcm, objectURI);
remotingMsg.putHeader(name, hdr);
remotingResponses.Clear();
down(new Event(Event.MSG, remotingMsg));
lock (remotingResponses)
{
start_time = System.Environment.TickCount;
time_to_wait = remotingTimeout;
int responsesDesired = 1;
if (dest == null)
{
responsesDesired = members.Count;
}
while (remotingResponses.Count < responsesDesired && time_to_wait > 0)
{
if (Trace.trace)
{
Trace.info(name + ".SyncProcessMessage()", "waiting for responses: time_to_wait=" + time_to_wait +
", got " + remotingResponses.Count + "|" + responsesDesired + " rsps");
}
Monitor.Wait(remotingResponses, (int)time_to_wait, true);
time_to_wait -= System.Environment.TickCount - start_time;
}
if (Trace.trace)
{
Trace.info(name + ".SyncProcessMessage()", "No longer waiting for responses as Initial Members = " + remotingResponses.Count + "|" + responsesDesired + " TimeToWait = " + time_to_wait);
}
retMsg = determineResponse();
if (retMsg == null)
{
throw new NullReferenceException("No remoting response to request");
}
}
}
catch (Exception e)
{
if (Trace.trace)
{
Trace.error(name + ".SyncProcessMessage()", "General error occured: " + e + "/n" + e.StackTrace);
}
retMsg = new ReturnMessage(e, mcm);
}
currentMethodCall = null;
return(retMsg);
}
/// <summary>
/// Receives events from the top of the stack
/// </summary>
/// <param name="evt">Event received</param>
public override void up(Event evt)
{
Object obj;
Message msg;
StackHeader hdr;
switch (evt.Type)
{
case Event.SET_LOCAL_ADDRESS:
local_addr = (Address)evt.Arg;
break;
case Event.MSG:
msg = (Message)evt.Arg;
obj = msg.getHeader(name);
if (obj == null || !(obj is StackHeader))
{
break;
}
hdr = (StackHeader)msg.removeHeader(name);
if (Trace.trace)
{
Trace.info("ProtocolSinkStack.up()", "received MSG : " + StackHeader.type2String(hdr.Type));
}
if (hdr.Type == StackHeader.REMOTE_RSP)
{
handleRemotingResponse(hdr);
}
else if (hdr.Type == StackHeader.REMOTE_REQ)
{
handleRemotingRequest(hdr);
}
else
{
if (Trace.trace)
{
Trace.error("GMS.up()", "StackHeader with type=" + hdr.Type + " not known");
}
}
return; // don't pass up
case Event.VIEW_CHANGE:
ArrayList tmp;
if ((tmp = ((View)evt.Arg).getMembers()) != null)
{
lock (members)
{
members.Clear();
for (int i = 0; i < tmp.Count; i++)
{
members.Add(tmp[i]);
}
}
}
break;
}
if (channel != null)
{
channel.up(evt);
}
}
