pool-monitor

pool-monitor.go

poolMonitor := &event.PoolMonitor{
				Event: func(e *event.PoolEvent) {
					switch e.Type {
					case event.PoolCreated:
						// mongo-connection pool creation events. 
						connPoolCreated++
					case event.GetSucceeded:
						// succesful mongo connection established by the pool
						connSuccess++
					case event.ConnectionClosed:
						// mongo-connection gets closed
						connClosed++
					case event.ConnectionReturned:
						// connection instance returns to the pool after completing a mongo transaction.
						connReturned++
					case event.PoolCleared:
						// PoolCleared event will remove all the connections from the pool
						connPoolCleared++
					}
				},
			}
client, err := mongo.NewClient(options.Client().
ApplyURI("mongodb://<username>:<password>@localhost:27017").SetPoolMonitor(poolMonitor))