/// <summary> Sends a message to a single member (destination = msg.dest) and returns the response. The message's destination
/// must be non-zero !
/// </summary>
public virtual object sendMessage(Message msg, byte mode, long timeout)
{
RspList rsp_list = null;
object dest = msg.Dest;
Rsp rsp;
GroupRequest _req = null;
if (dest == null)
return null;
ArrayList mbrs = ArrayList.Synchronized(new ArrayList(1));
mbrs.Add(dest); // dummy membership (of destination address)
ArrayList clusterMembership = channel.View.Members != null ? (ArrayList)channel.View.Members.Clone() : null;
_req = new GroupRequest(msg, corr, mbrs, clusterMembership, mode, timeout, 0, this._ncacheLog);
_req.execute();
if (mode == GroupRequest.GET_NONE)
{
return null;
}
((GroupChannel)channel).Stack.perfStatsColl.IncrementClusteredOperationsPerSecStats();
rsp_list = _req.Results;
if (rsp_list.size() == 0)
{
NCacheLog.Warn("MsgDispatcher.sendMessage()", " response list is empty");
return null;
}
if (rsp_list.size() > 1)
{
NCacheLog.Warn("MsgDispatcher.sendMessage()", "response list contains more that 1 response; returning first response !");
}
rsp = (Rsp) rsp_list.elementAt(0);
if (rsp.wasSuspected())
{
throw new SuspectedException(dest);
}
if (!rsp.wasReceived())
{
//we verify for the destination whether it is still part of the cluster or not.
if (corr.CheckForMembership((Address)rsp.Sender))
throw new Runtime.Exceptions.TimeoutException("operation timeout");
else
{
rsp.suspected = true;
throw new SuspectedException(dest);
}
}
return rsp.Value;
}
/// <summary>
/// Fetches the request status from the nodes.
/// </summary>
/// <param name="nodes"></param>
/// <returns></returns>
public Hashtable FetchRequestStatus(ArrayList nodes, ArrayList clusterMembership, long reqId)
{
Hashtable result = new Hashtable();
if (nodes != null && nodes.Count > 0)
{
HDR hdr = new HDR(HDR.GET_REQ_STATUS, NextRequestId,true, null);
hdr.status_reqId = reqId;
Message msg = new Message();
msg.putHeader(HeaderType.REQUEST_COORELATOR, hdr);
msg.Dests = nodes;
msg.IsSeqRequired = false;
msg.IsUserMsg = true;
msg.RequestId = reqId;
msg.setBuffer(new byte[0]);
GroupRequest req = new GroupRequest(msg, this, nodes, clusterMembership, GroupRequest.GET_ALL, 2000, 0, this._ncacheLog);
req.execute();
RspList rspList = req.Results;
RequestStatus reqStatus = null;
if (rspList != null)
{
for (int i = 0; i < rspList.size(); i++)
{
Rsp rsp = rspList.elementAt(i) as Rsp;
if (rsp != null)
{
if (rsp.received)
{
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("ReqCorrelator.FetchReqStatus", reqId + " status response received from " + rsp.sender);
object rspValue = rsp.Value;
if (rspValue is byte[])
reqStatus = CompactBinaryFormatter.Deserialize(new MemoryStream((byte[])rspValue), null) as RequestStatus;
else
reqStatus = rsp.Value as RequestStatus;
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("ReqCorrelator.FetchReqStatus", reqId + " status response: " + reqStatus);
result[rsp.Sender] = reqStatus;
}
else
{
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("ReqCorrelator.FetchReqStatus", reqId + " status response NOT received from " + rsp.sender);
result[rsp.Sender] = new RequestStatus(reqId,RequestStatus.NONE);
}
}
}
}
}
return result;
}
/// <summary> Cast a message to all members, and wait for <code>mode</code> responses. The responses are returned in a response
/// list, where each response is associated with its sender.<p> Uses <code>GroupRequest</code>.
///
/// </summary>
/// <param name="dests"> The members to which the message is to be sent. If it is null, then the message is sent to all
/// members
/// </param>
/// <param name="msg"> The message to be sent to n members
/// </param>
/// <param name="mode"> Defined in <code>GroupRequest</code>. The number of responses to wait for: <ol> <li>GET_FIRST:
/// return the first response received. <li>GET_ALL: wait for all responses (minus the ones from
/// suspected members) <li>GET_MAJORITY: wait for a majority of all responses (relative to the grp
/// size) <li>GET_ABS_MAJORITY: wait for majority (absolute, computed once) <li>GET_N: wait for n
/// responses (may block if n > group size) <li>GET_NONE: wait for no responses, return immediately
/// (non-blocking) </ol>
/// </param>
/// <param name="timeout">If 0: wait forever. Otherwise, wait for <code>mode</code> responses <em>or</em> timeout time.
/// </param>
/// <returns> RspList A list of responses. Each response is an <code>Object</code> and associated to its sender.
/// </returns>
public virtual RspList castMessage(ArrayList dests, Message msg, byte mode, long timeout)
{
GroupRequest _req = null;
ArrayList real_dests;
ArrayList clusterMembership = channel.View.Members != null ? (ArrayList)channel.View.Members.Clone() : null;
// we need to clone because we don't want to modify the original
// (we remove ourselves if LOCAL is false, see below) !
real_dests = dests != null ? (ArrayList)dests.Clone() : clusterMembership;
// if local delivery is off, then we should not wait for the message from the local member.
// therefore remove it from the membership
if (channel != null && channel.getOpt(Channel.LOCAL).Equals(false))
{
real_dests.Remove(channel.LocalAddress);
}
// don't even send the message if the destination list is empty
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("MsgDispatcher.castMessage()", "real_dests=" + Global.CollectionToString(real_dests));
if (real_dests == null || real_dests.Count == 0)
{
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("MsgDispatcher.castMessage()", "destination list is empty, won't send message");
return new RspList(); // return empty response list
}
_req = new GroupRequest(msg, corr, real_dests, clusterMembership, mode, timeout, 0, this._ncacheLog);
_req.execute();
if(mode != GroupRequest.GET_NONE)
((GroupChannel)channel).Stack.perfStatsColl.IncrementClusteredOperationsPerSecStats();
RspList rspList = _req.Results;
if(rspList != null)
{
for(int i = 0; i< rspList.size(); i++)
{
Rsp rsp = rspList.elementAt(i) as Rsp;
if (rsp != null)
{
if (!rsp.wasReceived() && !rsp.wasSuspected())
{
if (corr.CheckForMembership((Address)rsp.sender))
rsp.suspected = true;
}
}
}
}
return rspList;
}
