big refacting of communitation architect

opencv-motion-detect/evdaemon.cpp

@@ -55,6 +55,7 @@ private:
     queue<string> eventQue;
     mutex eventQLock;
     mutex cfgLock;
+    mutex mutSubsystem;
 
     /// module gid to process id
     json mapModsToPids;
@@ -100,9 +101,12 @@ private:
                 if(k == this->devSn) {
                     // startup evmgr
                     peerId = v["sn"].get<string>() + ":evmgr:0";
-                    // offline
                     this->peerData["config"][peerId] = v;
-                    this->peerData["status"][peerId] = 0;
+                    if(this->peerData["status"].count(peerId) == 0) {
+                        this->peerData["status"][peerId] = -1; // unkown
+                    }else{
+                        // nop
+                    }
                 }
 
                 // startup other submodules
@@ -129,7 +133,11 @@ private:
                             }
 
                             this->peerData["config"][peerId] = v;
-                            this->peerData["status"][peerId] = 0;
+                            if(this->peerData["status"].count(peerId) == 0) {
+                                this->peerData["status"][peerId] = -1; // unkown
+                            }else{
+                                // nop
+                            }
                         }
                     }
                 }
@@ -165,17 +173,27 @@ private:
     int startSubSystems()
     {
         // check status and startup
+        std::lock_guard<std::mutex> lock(mutSubsystem);
         int ret = 0;
         vector<string> tmp;
+        json unkown;
+        vector<string> terms;
         string info;
         int cnt = 0;
         for(auto &[k,v]: this->peerData["config"].items()) {
-            if(this->peerData["enabled"].count(k) != 0 && this->peerData["enabled"][k] != 0 && (this->peerData["status"].count(k) == 0 || this->peerData["status"][k] == 0)) {
+            if(this->peerData["enabled"].count(k) != 0 && this->peerData["enabled"][k] != 0) {
+                if((this->peerData["status"].count(k) == 0 || this->peerData["status"][k] == 0)){
                     tmp.push_back(k);
                     info += (cnt == 0? "" : string(", ")) + k;
+                }else if(this->peerData["status"][k] == -1) {
+                    unkown[k] = -1;
+                }                
+            }else{
+               terms.push_back(k); 
             }
             cnt++;
         }
+        
         spdlog::info("evdaemon {} will start following subsystems: {}", devSn, info);
         //
         for(string &e : tmp) {
@@ -191,6 +209,36 @@ private:
             }
         }
 
+        for(string &e: terms) {
+            if(this->peerData["pids"].count(e) != 0) {
+                kill(this->peerData["pids"][e], SIGTERM);
+            }
+        }
+
+        while(unkown.size() != 0) {
+            this_thread::sleep_for(chrono::seconds(3));
+            for(auto &[k,v]: unkown.items()) {
+                if(this->peerData["status"][k] != -1 && this->peerData["status"][k] != 0) {
+                    // no need to start
+                    unkown.erase(k);
+                }
+            }
+            cnt++;
+        }
+
+        for(auto &[k,v]: unkown.items()) {
+            pid_t pid = 0;
+            ret = zmqhelper::forkSubsystem(devSn, k, portRouter, pid);
+            if(0 == ret) {
+                this->peerData["status"][k] = 0;
+                this->peerData["pids"][k] = pid;
+                spdlog::info("evdaemon {} created subsystem {}", devSn, k);
+            }
+            else {
+                spdlog::info("evdaemon {} failed to create subsystem {}", devSn, k);
+            }
+        }
+
         return ret;
     }
 
@@ -227,15 +275,8 @@ private:
                 if(peerData["pids"].count(selfId) != 0) {
                     peerData["pids"].erase(selfId);
                 }
-
                 spdlog::warn("evdaemon {} peer {} disconnected. reloading config", devSn, selfId);
 
-                ret = reloadCfg();
-                if(ret != 0) {
-                    spdlog::error("evdaemon {} failed to reload config. please check configuration", devSn);
-                    return -1;
-                }
-
                 if(this->bBootstrap) {
                     startSubSystems();
                 }
@@ -278,7 +319,7 @@ private:
             // message to other peer
             // check peer status
             vector<vector<uint8_t> >v = {body[1], body[0], body[2], body[3]};
-            if(peerData["status"].count(peerId)!= 0 && peerData["status"][peerId] != 0) {
+            if(peerData["status"].count(peerId) != 0 && peerData["status"][peerId] != 0) {
                 spdlog::info("evdaemon {} route msg from {} to {}", devSn, selfId, peerId);
                 ret = z_send_multiple(pRouter, v);
                 if(ret < 0) {
@@ -389,6 +430,7 @@ private:
                             }
 
                             if(bBootstrap) {
+                                // TODO: wait for previous started modules to connecting
                                 startSubSystems();
                             }else{
                                 spdlog::info("evdaemon {} skip startup subsystems since BOOTSTRAP is set to false", devSn);