message: improved again
diff: @@ -25,6 +25,7 @@ export default class MongoDBStorage {
  private dbPingFailed = 0;
  private readonly dbConfig: StorageConfiguration;
  private readonly migrationConfig: MigrationConfiguration;
  + private connections = new Set<any>();
  // Create database access
  public constructor(dbConfig: StorageConfiguration) {
  @@ -293,17 +294,18 @@ export default class MongoDBStorage {
  readPreference: this.dbConfig.readPreference ? this.dbConfig.readPreference as ReadPreferenceMode : ReadPreferenceMode.secondaryPreferred
  }
  );
  - const connections = new Set<any>();
  this.mongoDBClient.on('connectionCreated',
  + // eslint-disable-next-line @typescript-eslint/no-unused-vars
  (event) => global.monitoringServer.getGauge(Constants.MONGODB_CONNECTION_CREATED).inc(1)
  );
  this.mongoDBClient.on('connectionClosed',
  + // eslint-disable-next-line @typescript-eslint/no-unused-vars
  (event) => global.monitoringServer.getGauge(Constants.MONGODB_CONNECTION_CLOSED).inc(1)
  );
  this.mongoDBClient.on('connectionReady',
  (event) => {
  - connections.add(event.connectionId);
  - global.monitoringServer.getGauge(Constants.MONGODB_CONNECTION_READY).set(connections.size);
  + this.connections.add(event.connectionId);
  + global.monitoringServer.getGauge(Constants.MONGODB_CONNECTION_READY).set(this.connections.size);
  }
  );
  this.database = this.mongoDBClient.db();
  