async getApplication()

in source/services/events-processing/lib/event.js [196:232]
30 lines of code
5 McCabe index (conditional complexity)

  async getApplication(applicationId) {
    const params = {
      TableName: process.env.APPLICATIONS_TABLE,
      Key: {
        application_id: applicationId
      }
    };
    
    // first try to fetch from cache
    let applicationsCacheResult = global.applicationsCache.get(applicationId);
    if (applicationsCacheResult == 'NOT_FOUND') {
      // if already marked not found, skip processing. Applications will remain "NOT_FOUND" until the cache refresh
      return Promise.resolve(null);
    } else if (applicationsCacheResult == undefined) {
      // get from DynamoDB and set in Applications cache
      const docClient = new AWS.DynamoDB.DocumentClient(this.dynamoConfig);
      try {
        let data = await docClient.get(params).promise();
        if (!_.isEmpty(data)) {
          // if found in ddb, set in cache and return it
          global.applicationsCache.set(applicationId, data.Item);
          return Promise.resolve(data.Item);
        } else {
          // if application isn't registered in dynamodb, set not found in cache
          console.log(`Application ${applicationId} not found in DynamoDB`);
          global.applicationsCache.set(applicationId, 'NOT_FOUND');
          return Promise.resolve(null);
        }
      } catch (err) {
        console.log(JSON.stringify(err));
        return Promise.reject(err);
      }
    } else {
      // if in cache, return it
      return Promise.resolve(applicationsCacheResult);
    }
  }