nodejs express mongodb project optimization

# Node.js Express Project Optimization

## Project Overview

We have an existing Node.js Express project that performs the following functions:

1. Connects to a RabbitMQ channel

2. Receives and processes incoming messages

3. Converts XML data to JSON

4. Saves the processed data to MongoDB

5. Utilizes additional services to check saved events

6. Updates event metadata using an external REST API

## Current Status

The project is functional but facing performance issues, primarily due to:

1. Inefficient XML to JSON conversion

2. Presence of special characters (e.g., '$') in the converted data, causing issues with MongoDB

3. Lack of proper indexing in MongoDB

4. Suboptimal data models

## Required Improvements

### 1. Code Refactoring and Optimization

- Review and refactor the existing codebase for better performance and maintainability

- Optimize the XML to JSON conversion process

- Implement efficient error handling and logging

### 2. Data Model Optimization

- Redesign MongoDB schemas to improve query performance

- Eliminate issues caused by special characters in field names (e.g., '$')

- Implement proper indexing strategies for frequently queried fields

### 3. Database Operations

- Optimize MongoDB read and write operations

- Implement efficient bulk operations where applicable

- Ensure proper connection pooling and management

### 4. Message Queue Handling

- Review and optimize RabbitMQ connection and channel management

- Implement robust error handling and recovery mechanisms for queue operations

### 5. API Integration

- Optimize the integration with the external REST API

- Implement caching mechanisms to reduce unnecessary API calls

### 6. Performance Monitoring and Scalability

- Implement performance monitoring tools (e.g., New Relic, PM2)

- Provide recommendations for scaling the application horizontally or vertically

### 7. Documentation

- Create comprehensive documentation for the optimized codebase

- Provide guidelines for future development and maintenance

## Required Skills

- Strong proficiency in Node.js and [login to view URL]

- Experience with MongoDB, including schema design and optimization

- Familiarity with RabbitMQ or similar message queue systems

- Expertise in XML parsing and JSON manipulation in JavaScript

- Knowledge of RESTful API design and integration

- Understanding of performance optimization techniques for Node.js applications

## Deliverables

1. Optimized and refactored codebase

2. Updated MongoDB schemas and indexing strategy

3. Performance analysis report

4. Documentation of changes and recommendations for future improvements

Please provide your approach to tackling these challenges, along with an estimated timeline and any questions you may have about the project.

example saved data And models

{"_id":{"$oid":"66d59f08a425cc66c5c05bcc"},"event_id":"sr:match:47118519","bet_settlement":[],"createdAt":{"$date":"2024-09-02T11:18:32.918Z"},"machstatus":false,"odds_change":[{"timestamp":"1725276016986","data":{"$":{"product":"3","event_id":"sr:match:47118519","timestamp":"1725276016986"},"sport_event_status":[{"$":{"home_score":"0","away_score":"0","tiebreak":"false","match_status":"0","status":"0"},"statistics":[{"yellow_cards":[{"$":{"home":"0","away":"0"}}],"red_cards":[{"$":{"home":"0","away":"0"}}],"yellow_red_cards":[{"$":{"home":"0","away":"0"}}],"corners":[{"$":{"home":"0","away":"0"}}]}]}],"odds":[{"market":[{"$":{"status":"1","id":"1","favourite":"1"},"outcome":[{"$":{"id":"1","active":"1","odds":"2.84"}},{"$":{"id":"2","active":"1","odds":"3.65"}},{"$":{"id":"3","active":"1","odds":"2.54"}}]},{"$":{"status":"1","id":"547","specifiers":"total=3.5"},"outcome":[{"$":{"id":"1724","active":"1","odds":"2.2"}},{"$":{"id":"1725","active":"1","odds":"1.85"}},{"$":{"id":"1726","active":"1","odds":"2.07"}},{"$":{"id":"1727","active":"1","odds":"5.27"}},{"$":{"id":"1728","active":"1","odds":"4.11"}},{"$":{"id":"1729","active":"1","odds":"4.76"}}]},{"$":{"status":"1","id":"547","specifiers":"total=4.5"},"outcome":[{"$":{"id":"1724","active":"1","odds":"1.78"}},{"$":{"id":"1725","active":"1","odds":"1.56"}},{"$":{"id":"1726","active":"1","odds":"1.66"}},{"$":{"id":"1727","active":"1","odds":"12.42"}},{"$":{"id":"1728","active":"1","odds":"7.06"}},{"$":{"id":"1729","active":"1","odds":"10.89"}}]}]}]},"_id":{"$oid":"66d59f718e8cd716bb4ff09d"}}],"updatedAt":{"$date":"2024-09-02T11:20:17.431Z"},"event_status":[{"$":{"home_score":"0","away_score":"0","tiebreak":"false","match_status":"0","status":"0"},"statistics":[{"yellow_cards":[{"$":{"home":"0","away":"0"}}],"red_cards":[{"$":{"home":"0","away":"0"}}],"yellow_red_cards":[{"$":{"home":"0","away":"0"}}],"corners":[{"$":{"home":"0","away":"0"}}]}]}],"meta_data":{"event_id":"sr:match:47118519","json_data":{"match_summary":{"$":{"xmlns:xsi":"[login to view URL]","generated_at":"2024-09-02T11:19:37+00:00","xmlns":"[login to view URL]","xsi:schemaLocation":"[login to view URL] [login to view URL]"},"sport_event":[{"$":{"id":"sr:match:47118519","scheduled":"2024-09-02T17:00:00+00:00","start_time_tbd":"false"},"tournament_round":[{"$":{"type":"group","phase":"regular season","number":"20","betradar_id":"4301","betradar_name":"Ettan, Sodra","group_long_name":"Ettan, Sodra"}}],"season":[{"$":{"id":"sr:season:114999","name":"Ettan, Sodra 2024","tournament_id":"sr:tournament:68","start_date":"2024-03-29","end_date":"2024-11-12","year":"2024"}}],"tournament":[{"$":{"id":"sr:tournament:68","name":"Ettan, Sodra"},"sport":[{"$":{"id":"sr:sport:1","name":"Soccer"}}],"category":[{"$":{"id":"sr:category:9","name":"Sweden","country_code":"SWE"}}]}],"competitors":[{"competitor":[{"$":{"id":"sr:competitor:1841","name":"Jonkopings Sodra IF","country":"Sweden","short_name":"Jonkopings Sodra","country_code":"SWE","abbreviation":"JON","gender":"male","qualifier":"home"}},{"$":{"id":"sr:competitor:1849","name":"Norrby IF","country":"Sweden","short_name":"Norrby","country_code":"SWE","abbreviation":"NOR","gender":"male","qualifier":"away"}}]}]}],"sport_event_status":[{"$":{"status_code":"0","status":"not_started"}}],"coverage_info":[{"$":{"level":"silver","covered_from":"venue","live_coverage":"true"},"coverage":[{"$":{"includes":"basic_score"}},{"$":{"includes":"key_events"}}]}]}}},"updated_at":{"$date":"2024-09-02T11:19:37.099Z"},"sport_name":"Soccer","sportdate":{"$date":"2024-09-02T17:00:00.000Z"}}

const mongoose = require('mongoose');

const EventSchema = new [login to view URL]({

event_id: {

type: String,

required: true,

unique: true

},

odds_change: [{

timestamp: String,

data: Object

}],

bet_settlement: [{

timestamp: String,

data: Object

}],

meta_data: {

event_id: String,

json_data: Object

},

event_status: Object,

sport_name: String,

sportdate: Date,

status: String,

machstatus: {

type: Boolean,

default: false

},

updated_at: Date

}, {

timestamps: true,

versionKey: false

});

// Indexes (opsiyonel)

[login to view URL]({ sport_name: 1 });

[login to view URL]({ status: 1 });

[login to view URL]({ sportdate: 1 });

// 'meta_data.json_data.match_summary.sport_event.0.tournament.0.sport.0.$.id': 1,

[login to view URL]({ 'meta_data.json_data.match_summary.sport_event.0.tournament.0.sport.0.$.id': 1 });

// pre('save') Middleware

[login to view URL]('save', async function (next) {

// sport_name ve sportdate alanlarını belirleme

if (this.meta_data &&

this.meta_data.json_data &&

this.meta_data.json_data.match_summary &&

this.meta_data.json_data.match_summary.sport_event &&

[login to view URL] > 0) {

// sport_name

const sport = this.meta_data.json_data.match_summary.sport_event[0]?.tournament[0]?.sport[0]?.['$'];

if (sport?.name) {

this.sport_name = [login to view URL];

}

// sportdate

const scheduledDate = this.meta_data.json_data.match_summary.sport_event[0]?.['$']?.scheduled;

if (scheduledDate) {

[login to view URL] = new Date(scheduledDate);

}

}

next();

});

const Event = [login to view URL]('Event', EventSchema);

[login to view URL] = Event;

Node.js Express JS MongoDB MySQL

Project ID: #38525825

About the project