man poc

poc-datacollector/modules/ROOT/pages/doc-readmongo_service.adoc

@@ -5,6 +5,11 @@
 
  src: readmongo/swarmlab-app/src/run/
 
+
+
+
+
+
 === stream2mongo
 
 [source,javascript]
@@ -56,6 +61,51 @@ After clients insert new additional documents into a capped collection, the tail
 [source,javascript]
 ----
 
+const pubClient = new Redis({
+  host: REDIS,
+  port: REDIS_PORT,
+});
+
+// read from redis
+async function getkey(id) {
+  return new Promise((resolve) => {
+    pubClient.get(id, function (err, reply) {
+      if (err) {
+        resolve(null);
+      } else {
+        if (reply) {
+          //console.log("---------fount----------");
+          resolve(1);
+        } else {
+          console.log("----------not fount------------");
+          resolve(2);
+        }
+      }
+    });
+  });
+}
+
+// check if stream exists
+async function checkstream(data) {
+  var res = await getkey(data.id);
+  if (res == "1") {
+    console.log("Stream is on!");
+  } else {
+    console.log("Creating Stream....");
+
+    var url = URL;
+    MongoClient.connect(
+      url,
+      { useNewUrlParser: true, useUnifiedTopology: true },
+      function (err, db) {
+        if (err) throw err;
+        var dbo = db.db(DATABASE);
+        dbo.collection(COLLECTION, onCollectionNew.bind(data));
+      }
+    );
+  }
+}
+
 io.on("connection", (s) => {
   console.error("socket connection");
   var usersession = new Object();
@@ -91,6 +141,10 @@ io.on("connection", (s) => {
       user: data,
       id: s.id,
     };
+    checkstream(binddata);
+  });
+
+}
 ----