CPN::RemoteContextServer Class Reference

the server for the remote context. More...

#include <RemoteContextServer.h>

Inheritance diagram for CPN::RemoteContextServer:

Collaboration diagram for CPN::RemoteContextServer:

Public Member Functions
	RemoteContextServer ()
virtual	~RemoteContextServer ()
virtual void	Terminate ()
bool	IsTerminated () const
int	DebugLevel () const
int	DebugLevel (int level)

Protected Member Functions
void	DispatchMessage (const std::string &sender, const Variant &msg)
	Process the given message. More...
virtual void	SendMessage (const std::string &recipient, const Variant &msg)=0
	Send the given message to the given client. More...
virtual void	BroadcastMessage (const Variant &msg)=0
	Broadcast a message to all clients. More...
virtual void	LogMessage (const std::string &msg)=0
	Log a message. More...
void	dbprintf (int level, const char *fmt,...)

Private Types
typedef std::map< Key_t, Variant >	DataMap
typedef std::map< std::string, Key_t >	NameKeyMap

Private Member Functions
void	SetupKernel (const std::string &sender, const Variant &msg)
void	SignalKernelStart (const Variant &msg)
void	SignalKernelEnd (const Variant &msg)
void	GetKernelInfo (const std::string &sender, const Variant &msg)
void	CreateNodeKey (const std::string &sender, const Variant &msg)
void	SignalNodeStart (const Variant &msg)
void	SignalNodeEnd (const Variant &msg)
void	GetNodeInfo (const std::string &sender, const Variant &msg)
void	GetNumNodeLive (const std::string &sender, const Variant &msg)
void	GetCreateEndpointKey (const std::string &sender, const Variant &msg)
void	GetEndpointInfo (const std::string &sender, const Variant &msg)
void	ConnectEndpoints (const Variant &msg)
Key_t	NewKey ()
void	RouteKernelMessage (const Variant &msg)
Variant	NewBroadcastMessage ()

Private Attributes
DataMap	datamap
NameKeyMap	kernelmap
NameKeyMap	nodemap
int	debuglevel
bool	shutdown
unsigned	numlivenodes
Key_t	keycount

Detailed Description

the server for the remote context.

Implementors only need to override SendMessage, BroadcastMessage, and LogMessage. then call DispatchMessage for all messages from the clients.

Definition at line 114 of file RemoteContextServer.h.

Member Typedef Documentation

typedef std::map<Key_t, Variant> CPN::RemoteContextServer::DataMap

private

Definition at line 170 of file RemoteContextServer.h.

typedef std::map<std::string, Key_t> CPN::RemoteContextServer::NameKeyMap

private

Definition at line 172 of file RemoteContextServer.h.

Constructor & Destructor Documentation

CPN::RemoteContextServer::RemoteContextServer

(

)

Definition at line 32 of file RemoteContextServer.cc.

        : debuglevel(0), shutdown(false), numlivenodes(0), keycount(0)
    {
    }

CPN::RemoteContextServer::~RemoteContextServer ( )

virtual

Definition at line 37 of file RemoteContextServer.cc.

                                              {
    }

Member Function Documentation

virtual void CPN::RemoteContextServer::BroadcastMessage ( const Variant &  msg )

protectedpure virtual

Broadcast a message to all clients.

Parameters

msg	the message to send to all clients

Implemented in CPN::RemoteContextDaemon.

Referenced by SignalKernelEnd(), SignalKernelStart(), SignalNodeEnd(), SignalNodeStart(), and Terminate().

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void CPN::RemoteContextServer::ConnectEndpoints ( const Variant &  msg )

private

Definition at line 331 of file RemoteContextServer.cc.

References datamap.

Referenced by DispatchMessage().

                                                                 {
        Key_t wkey = msg["writerkey"].AsNumber<Key_t>();
        Key_t rkey = msg["readerkey"].AsNumber<Key_t>();
        std::string qname = msg["qname"].AsString();
        datamap[wkey]["readerkey"] = rkey;
        datamap[rkey]["writerkey"] = wkey;
        datamap[rkey]["qname"] = qname;
        datamap[wkey]["qname"] = qname;
    }

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void CPN::RemoteContextServer::CreateNodeKey ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 197 of file RemoteContextServer.cc.

References datamap, dbprintf(), NewKey(), nodemap, and SendMessage().

Referenced by DispatchMessage().

                                                                                       {
        std::string nodename = msg["name"].AsString();
        Variant reply(Variant::MapType);
        reply["msgid"] = msg["msgid"];
        reply["msgtype"] = "reply";
        if (nodemap.find(nodename) != nodemap.end()) {
            reply["success"] = false;
        } else {
            Key_t nodekey = NewKey();
            Variant nodeinfo(Variant::MapType);
            nodeinfo["name"] = nodename;
            nodeinfo["key"] = nodekey;
            nodeinfo["kernelkey"] = msg["kernelkey"];
            nodeinfo["started"] = false;
            nodeinfo["dead"] = false;
            nodeinfo["type"] = "nodeinfo";
            nodeinfo["endpoints"] = Variant::MapType;
            dbprintf(2, "Node %s created\n", nodename.c_str());
            nodemap[nodename] = nodekey;
            datamap[nodekey] = nodeinfo;
            reply["success"] = true;
            reply["nodeinfo"] = nodeinfo.Copy();
        }
        SendMessage(sender, reply);
    }

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void CPN::RemoteContextServer::dbprintf ( int  level, const char *  fmt,   ...  )

protected

Definition at line 40 of file RemoteContextServer.cc.

References debuglevel.

Referenced by CPN::RemoteContextDaemon::BroadcastMessage(), CPN::RemoteContextDaemon::Client::Client(), CreateNodeKey(), DispatchMessage(), CPN::RemoteContextDaemon::LogMessage(), CPN::RemoteContextDaemon::Run(), CPN::RemoteContextDaemon::SendMessage(), SetupKernel(), SignalKernelEnd(), SignalKernelStart(), SignalNodeEnd(), SignalNodeStart(), and CPN::RemoteContextDaemon::Terminate().

                                                                      {
        if (debuglevel >= level) {
            va_list ap;
            va_start(ap, fmt);
            vprintf(fmt, ap);
            va_end(ap);
        }
    }

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int CPN::RemoteContextServer::DebugLevel ( ) const

inline

Definition at line 126 of file RemoteContextServer.h.

References debuglevel.

{ return debuglevel; }

int CPN::RemoteContextServer::DebugLevel ( int  level )

inline

Definition at line 127 of file RemoteContextServer.h.

References debuglevel.

{ return debuglevel = level; }

void CPN::RemoteContextServer::DispatchMessage ( const std::string &  sender, const Variant &  msg  )

protected

Process the given message.

Parameters

sender	a string id for the client
msg	the message that the client sent

Definition at line 49 of file RemoteContextServer.cc.

References ASSERT, ConnectEndpoints(), CreateNodeKey(), dbprintf(), GetCreateEndpointKey(), GetEndpointInfo(), GetKernelInfo(), GetNodeInfo(), GetNumNodeLive(), IsTerminated(), LogMessage(), CPN::RCTXMT_CONNECT_ENDPOINTS, CPN::RCTXMT_CREATE_NODE, CPN::RCTXMT_CREATE_NODE_KEY, CPN::RCTXMT_CREATE_QUEUE, CPN::RCTXMT_CREATE_READER, CPN::RCTXMT_CREATE_WRITER, CPN::RCTXMT_GET_CREATE_READER_KEY, CPN::RCTXMT_GET_CREATE_WRITER_KEY, CPN::RCTXMT_GET_KERNEL_INFO, CPN::RCTXMT_GET_NODE_INFO, CPN::RCTXMT_GET_NUM_NODE_LIVE, CPN::RCTXMT_GET_READER_INFO, CPN::RCTXMT_GET_WRITER_INFO, CPN::RCTXMT_LOG, CPN::RCTXMT_SETUP_KERNEL, CPN::RCTXMT_SIGNAL_KERNEL_END, CPN::RCTXMT_SIGNAL_KERNEL_START, CPN::RCTXMT_SIGNAL_NODE_END, CPN::RCTXMT_SIGNAL_NODE_START, CPN::RCTXMT_TERMINATE, RouteKernelMessage(), SetupKernel(), SignalKernelEnd(), SignalKernelStart(), SignalNodeEnd(), SignalNodeStart(), and Terminate().

                                                                                         {
        dbprintf(4, "msg:%s:%s\n", sender.c_str(), libvariant::SerializeJSON(msg).c_str());
        if (!msg.IsMap()) { return; }
        if (IsTerminated()) {
            return;
        }
        RCTXMT_t type = msg["type"].AsNumber<RCTXMT_t>();
        switch (type) {
        case RCTXMT_SETUP_KERNEL:
            SetupKernel(sender, msg);
            break;
        case RCTXMT_SIGNAL_KERNEL_START:
            SignalKernelStart(msg);
            break;
        case RCTXMT_SIGNAL_KERNEL_END:
            SignalKernelEnd(msg);
            break;
        case RCTXMT_GET_KERNEL_INFO:
            GetKernelInfo(sender, msg);
            break;
        case RCTXMT_CREATE_WRITER:
        case RCTXMT_CREATE_READER:
        case RCTXMT_CREATE_QUEUE:
        case RCTXMT_CREATE_NODE:
            RouteKernelMessage(msg);
            break;
        case RCTXMT_CREATE_NODE_KEY:
            CreateNodeKey(sender, msg);
            break;
        case RCTXMT_SIGNAL_NODE_START:
            SignalNodeStart(msg);
            break;
        case RCTXMT_SIGNAL_NODE_END:
            SignalNodeEnd(msg);
            break;
        case RCTXMT_GET_NODE_INFO:
            GetNodeInfo(sender, msg);
            break;
        case RCTXMT_GET_NUM_NODE_LIVE:
            GetNumNodeLive(sender, msg);
            break;
        case RCTXMT_GET_CREATE_READER_KEY:
            GetCreateEndpointKey(sender, msg);
            break;
        case RCTXMT_GET_READER_INFO:
            GetEndpointInfo(sender, msg);
            break;
        case RCTXMT_GET_CREATE_WRITER_KEY:
            GetCreateEndpointKey(sender, msg);
            break;
        case RCTXMT_GET_WRITER_INFO:
            GetEndpointInfo(sender, msg);
            break;
        case RCTXMT_CONNECT_ENDPOINTS:
            ConnectEndpoints(msg);
            break;
        case RCTXMT_TERMINATE:
            Terminate();
            break;
        case RCTXMT_LOG:
            LogMessage(sender + ":" + msg["msg"].AsString());
            break;
        default:
            ASSERT(false);
        }
    }

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void CPN::RemoteContextServer::GetCreateEndpointKey ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 281 of file RemoteContextServer.cc.

References ASSERT, datamap, NewKey(), and SendMessage().

Referenced by DispatchMessage().

                                                                                              {
        std::string name = msg["name"].AsString();
        Variant reply;
        reply["msgid"] = msg["msgid"];
        reply["msgtype"] = "reply";
        reply["success"] = false;
        Key_t nodekey = msg["nodekey"].AsNumber<Key_t>();
        DataMap::iterator nodeentry = datamap.find(nodekey);
        if (nodeentry != datamap.end()) {
            Variant nodeinfo = nodeentry->second;
            Variant epinfo;
            Key_t epkey;
            if (nodeinfo["endpoints"].Contains(name)) {
                epkey = nodeinfo["endpoints"][name].AsNumber<Key_t>();
                epinfo = datamap[epkey];
                ASSERT(epinfo["type"].AsString() == "endpointinfo");
            } else {
                epkey = NewKey();
                nodeinfo["endpoints"][name] = epkey;
                epinfo = Variant(Variant::MapType);
                epinfo["key"] = epkey;
                epinfo["name"] = name;
                epinfo["nodekey"] = nodekey;
                epinfo["kernelkey"] = nodeinfo["kernelkey"];
                epinfo["live"] = true;
                epinfo["type"] = "endpointinfo";
                datamap[epkey] = epinfo;
            }
            reply["endpointinfo"] = epinfo.Copy();
            reply["success"] = true;
        }
        SendMessage(sender, reply);
    }

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void CPN::RemoteContextServer::GetEndpointInfo ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 315 of file RemoteContextServer.cc.

References ASSERT, datamap, and SendMessage().

Referenced by DispatchMessage().

                                                                                         {
        Key_t epkey = msg["key"].AsNumber<Key_t>();
        Variant reply;
        reply["msgid"] = msg["msgid"];
        reply["msgtype"] = "reply";
        reply["success"] = false;
        DataMap::iterator entry = datamap.find(epkey);
        if (entry != datamap.end()) {
            reply["success"] = true;
            reply["endpointinfo"] = entry->second.Copy();
            ASSERT(reply["endpointinfo"]["type"].AsString() == "endpointinfo");
        }
        SendMessage(sender, reply);

    }

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void CPN::RemoteContextServer::GetKernelInfo ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 172 of file RemoteContextServer.cc.

References ASSERT, datamap, kernelmap, and SendMessage().

Referenced by DispatchMessage().

                                                                                       {
        Key_t kernelkey;
        Variant reply(Variant::MapType);
        reply["msgtype"] = "reply";
        reply["msgid"] = msg["msgid"];
        reply["success"] = false;
        if (msg.Contains("name")) {
            NameKeyMap::iterator entry = kernelmap.find(msg["name"].AsString());
            if (entry == kernelmap.end()) {
                SendMessage(sender, reply);
                return;
            }
            kernelkey = entry->second;
        } else {
            kernelkey = msg["key"].AsNumber<Key_t>();
        }
        DataMap::iterator entry = datamap.find(kernelkey);
        if (entry != datamap.end()) {
            ASSERT(entry->second["type"].AsString() == "kernelinfo");
            reply["success"] = true;
            reply["kernelinfo"] = entry->second.Copy();
        }
        SendMessage(sender, reply);
    }

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void CPN::RemoteContextServer::GetNodeInfo ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 247 of file RemoteContextServer.cc.

References ASSERT, datamap, nodemap, and SendMessage().

Referenced by DispatchMessage().

                                                                                     {
        Key_t nodekey;
        Variant reply(Variant::MapType);
        reply["msgtype"] = "reply";
        reply["msgid"] = msg["msgid"];
        reply["success"] = false;
        if (msg.Contains("name")) {
            NameKeyMap::iterator entry = nodemap.find(msg["name"].AsString());
            if (entry == nodemap.end()) {
                SendMessage(sender, reply);
                return;
            }
            nodekey = entry->second;
        } else {
            nodekey = msg["key"].AsNumber<Key_t>();
        }
        DataMap::iterator entry = datamap.find(nodekey);
        if (entry != datamap.end()) {
            reply["nodeinfo"] = entry->second.Copy();
            ASSERT(reply["nodeinfo"]["type"].AsString() == "nodeinfo");
            reply["success"] = true;
        }
        SendMessage(sender, reply);
    }

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void CPN::RemoteContextServer::GetNumNodeLive ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 272 of file RemoteContextServer.cc.

References numlivenodes, and SendMessage().

Referenced by DispatchMessage().

                                                                                        {
        Variant reply(Variant::MapType);
        reply["msgid"] = msg["msgid"];
        reply["msgtype"] = "reply";
        reply["numlivenodes"] = numlivenodes;
        reply["success"] = true;
        SendMessage(sender, reply);
    }

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bool CPN::RemoteContextServer::IsTerminated ( ) const

inline

Returns

whether or not the context is in the shutdown state.

Definition at line 125 of file RemoteContextServer.h.

References shutdown.

Referenced by CPN::RemoteContextDaemon::BroadcastMessage(), DispatchMessage(), CPN::RemoteContextDaemon::Run(), CPN::RemoteContextDaemon::SendMessage(), and CPN::RemoteContextDaemon::Terminate().

{ return shutdown; }

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virtual void CPN::RemoteContextServer::LogMessage ( const std::string &  msg )

protectedpure virtual

Log a message.

Parameters

msg	the message to be logged

Implemented in CPN::RemoteContextDaemon.

Referenced by DispatchMessage().

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Variant CPN::RemoteContextServer::NewBroadcastMessage ( )

private

Definition at line 352 of file RemoteContextServer.cc.

References numlivenodes.

Referenced by SignalKernelEnd(), SignalKernelStart(), SignalNodeEnd(), and SignalNodeStart().

                                                     {
        Variant msg;
        msg["msgtype"] = "broadcast";
        msg["numlivenodes"] = numlivenodes;
        return msg;
    }

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Key_t CPN::RemoteContextServer::NewKey ( )

private

Definition at line 341 of file RemoteContextServer.cc.

References keycount.

Referenced by CreateNodeKey(), GetCreateEndpointKey(), and SetupKernel().

                                      {
        // 0 is reserved
        return ++keycount;
    }

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void CPN::RemoteContextServer::RouteKernelMessage ( const Variant &  msg )

private

Definition at line 346 of file RemoteContextServer.cc.

References datamap, and SendMessage().

Referenced by DispatchMessage().

                                                                   {
        Key_t kernelkey = msg["kernelkey"].AsNumber<Key_t>();
        Variant kernelinfo = datamap[kernelkey];
        SendMessage(kernelinfo["client"].AsString(), msg);
    }

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virtual void CPN::RemoteContextServer::SendMessage ( const std::string &  recipient, const Variant &  msg  )

protectedpure virtual

Send the given message to the given client.

Parameters

recipient	the id (previously used in DispatchMessage sender)
msg	the message to be sent to the client

Implemented in CPN::RemoteContextDaemon.

Referenced by CreateNodeKey(), GetCreateEndpointKey(), GetEndpointInfo(), GetKernelInfo(), GetNodeInfo(), GetNumNodeLive(), RouteKernelMessage(), and SetupKernel().

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void CPN::RemoteContextServer::SetupKernel ( const std::string &  sender, const Variant &  msg  )

private

Definition at line 123 of file RemoteContextServer.cc.

References datamap, dbprintf(), kernelmap, NewKey(), and SendMessage().

Referenced by DispatchMessage().

                                                                                     {
        std::string name = msg["name"].AsString();
        Variant reply(Variant::MapType);
        reply["msgid"] = msg["msgid"];
        reply["msgtype"] = "reply";
        if (kernelmap.find(name) != kernelmap.end()) {
            reply["success"] = false;
            return;
        } else {
            Variant kernelinfo(Variant::MapType);
            Key_t kernelkey = NewKey();
            kernelinfo["key"] = kernelkey;
            kernelinfo["name"] = name;
            kernelinfo["hostname"] = msg["hostname"];
            kernelinfo["servname"] = msg["servname"];
            kernelinfo["live"] = false;
            kernelinfo["type"] = "kernelinfo";
            kernelinfo["client"] = sender;
            datamap.insert(std::make_pair(kernelkey, kernelinfo));
            kernelmap.insert(std::make_pair(name, kernelkey));
            dbprintf(2, "Kernel %s created\n", name.c_str());
            reply["success"] = true;
            reply["kernelinfo"] = kernelinfo.Copy();
        }
        SendMessage(sender, reply);
    }

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void CPN::RemoteContextServer::SignalKernelEnd ( const Variant &  msg )

private

Definition at line 161 of file RemoteContextServer.cc.

References ASSERT, BroadcastMessage(), datamap, dbprintf(), and NewBroadcastMessage().

Referenced by DispatchMessage().

                                                                {
        Key_t kernelkey = msg["key"].AsNumber<Key_t>();
        Variant kernelinfo = datamap[kernelkey];
        ASSERT(kernelinfo["type"].AsString() == "kernelinfo");
        kernelinfo["live"] = false;
        dbprintf(2, "Kernel %s stopped\n", kernelinfo["name"].AsString().c_str());
        Variant notice = NewBroadcastMessage();
        notice["kernelinfo"] = kernelinfo.Copy();
        BroadcastMessage(notice);
    }

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void CPN::RemoteContextServer::SignalKernelStart ( const Variant &  msg )

private

Definition at line 150 of file RemoteContextServer.cc.

References ASSERT, BroadcastMessage(), datamap, dbprintf(), and NewBroadcastMessage().

Referenced by DispatchMessage().

                                                                  {
        Key_t kernelkey = msg["key"].AsNumber<Key_t>();
        Variant kernelinfo = datamap[kernelkey];
        ASSERT(kernelinfo["type"].AsString() == "kernelinfo");
        kernelinfo["live"] = true;
        dbprintf(2, "Kernel %s started\n", kernelinfo["name"].AsString().c_str());
        Variant notice = NewBroadcastMessage();
        notice["kernelinfo"] = kernelinfo.Copy();
        BroadcastMessage(notice);
    }

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void CPN::RemoteContextServer::SignalNodeEnd ( const Variant &  msg )

private

Definition at line 235 of file RemoteContextServer.cc.

References ASSERT, BroadcastMessage(), datamap, dbprintf(), NewBroadcastMessage(), and numlivenodes.

Referenced by DispatchMessage().

                                                              {
        --numlivenodes;
        Key_t nodekey = msg["key"].AsNumber<Key_t>();
        Variant nodeinfo = datamap[nodekey];
        ASSERT(nodeinfo["type"].AsString() == "nodeinfo");
        nodeinfo["dead"] = true;
        dbprintf(2, "Node %s stopped\n", nodeinfo["name"].AsString().c_str());
        Variant notice = NewBroadcastMessage();
        notice["nodeinfo"] = nodeinfo.Copy();
        BroadcastMessage(notice);
    }

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void CPN::RemoteContextServer::SignalNodeStart ( const Variant &  msg )

private

Definition at line 223 of file RemoteContextServer.cc.

References ASSERT, BroadcastMessage(), datamap, dbprintf(), NewBroadcastMessage(), and numlivenodes.

Referenced by DispatchMessage().

                                                                {
        ++numlivenodes;
        Key_t nodekey = msg["key"].AsNumber<Key_t>();
        Variant nodeinfo = datamap[nodekey];
        ASSERT(nodeinfo["type"].AsString() == "nodeinfo");
        nodeinfo["started"] = true;
        dbprintf(2, "Node %s started\n", nodeinfo["name"].AsString().c_str());
        Variant notice = NewBroadcastMessage();
        notice["nodeinfo"] = nodeinfo.Copy();
        BroadcastMessage(notice);
    }

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void CPN::RemoteContextServer::Terminate ( )

virtual

Cause the context to go into the shutdown state.

Reimplemented in CPN::RemoteContextDaemon.

Definition at line 116 of file RemoteContextServer.cc.

References BroadcastMessage(), CPN::RCTXMT_TERMINATE, and shutdown.

Referenced by DispatchMessage(), and CPN::RemoteContextDaemon::Terminate().

                                        {
        Variant msg(Variant::MapType);
        msg["type"] = RCTXMT_TERMINATE;
        BroadcastMessage(msg);
        shutdown = true;
    }

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Member Data Documentation

DataMap CPN::RemoteContextServer::datamap

private

Definition at line 171 of file RemoteContextServer.h.

Referenced by ConnectEndpoints(), CreateNodeKey(), GetCreateEndpointKey(), GetEndpointInfo(), GetKernelInfo(), GetNodeInfo(), RouteKernelMessage(), SetupKernel(), SignalKernelEnd(), SignalKernelStart(), SignalNodeEnd(), and SignalNodeStart().

int CPN::RemoteContextServer::debuglevel

private

Definition at line 176 of file RemoteContextServer.h.

Referenced by dbprintf(), and DebugLevel().

NameKeyMap CPN::RemoteContextServer::kernelmap

private

Definition at line 173 of file RemoteContextServer.h.

Referenced by GetKernelInfo(), and SetupKernel().

Key_t CPN::RemoteContextServer::keycount

private

Definition at line 180 of file RemoteContextServer.h.

Referenced by NewKey().

NameKeyMap CPN::RemoteContextServer::nodemap

private

Definition at line 174 of file RemoteContextServer.h.

Referenced by CreateNodeKey(), and GetNodeInfo().

unsigned CPN::RemoteContextServer::numlivenodes

private

Definition at line 178 of file RemoteContextServer.h.

Referenced by GetNumNodeLive(), NewBroadcastMessage(), SignalNodeEnd(), and SignalNodeStart().

bool CPN::RemoteContextServer::shutdown

private

Definition at line 177 of file RemoteContextServer.h.

Referenced by IsTerminated(), and Terminate().

---

The documentation for this class was generated from the following files:

• include/cpn/remote_context/RemoteContextServer.h
• lib/RemoteContextServer.cc