connected to atlas

src/main.ts

@@ -12,7 +12,9 @@ let dispatcher = new mqtt.MqttDispatcher("mqtts://broker.hottis.de:8883",
 
 dispatcher.register('IoT/espThermometer2/#', 'toJson', EspThermToJson.espThermToJson)
 
-let mongo : MongoSave.MongoSave = new MongoSave.MongoSave()
+
+let atlasUrl = "mongodb://receiver:esp8266.@cluster0-shard-00-00-7qduq.mongodb.net:27017,cluster0-shard-00-01-7qduq.mongodb.net:27017,cluster0-shard-00-02-7qduq.mongodb.net:27017/hottis?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin"
+let mongo : MongoSave.MongoSave = new MongoSave.MongoSave(atlasUrl)
 dispatcher.register('IoT/espThermometer2/#', 'MongoSave', mongo);
 
 

src/mongosave.ts

@@ -1,12 +1,52 @@
 import * as CallChain from './callchain'
 import * as log from './log'
+import * as MongoDB from 'mongodb'
+
 
 export class MongoSave extends CallChain.ABaseChainItem  {
-    constructor() {
+    private _url : string
+    private _mongoClient : MongoDB.MongoClient
+    private _dbh : MongoDB.Db | undefined
+    private _connectPending : boolean
+
+    constructor(url:string) {
         super('MongoSave')
+        this._url = url
+        this._mongoClient = new MongoDB.MongoClient()
+        this._connectPending = false
     }
 
     protected func(message : any) : any {
+        if (! this._dbh) {
+            log.info("Not database connection yet")
+            if (! this._connectPending) {
+                this._connectPending = true
+                this._mongoClient.connect(this._url)
+                    .then((db:MongoDB.Db) => { 
+                        log.info("Successfully opened MongoDB connect")
+                        this._dbh = db
+                    })
+                    .catch((err) => {
+                        log.error(`Failure when opening MongoDB connect: ${err}`)
+                        this._dbh = undefined
+                    })
+            } else {
+                log.info("Connecting to database is pending")
+            }
+        }
+        if (this._dbh) {
+            log.info("Database handle is available")
+            let coll : MongoDB.Collection = this._dbh.collection("iot")
+            coll.insertOne(message)
+                .then((res : MongoDB.InsertOneWriteOpResult) => {
+                    log.info(`Successfully wrote one item in database: ${res.insertedId}`)
+                })
+                .catch((err : any) => {
+                    log.error(`Failure when trying to write one item in database: ${err}`)
+                })
+        } else {
+            log.error(`No database connection yet, drop message ${message}`)
+        }
         return "<<" + message + ">>"
     }