Quora-Microservices

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Quora-Microservices

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# Live Coding a Project: Building Quora with Microservices in Java Spring Boot

Micro-services can be developed, deployed, and scaled independently. This can improve the performance, reliability, and maintainability of the application.

For example, a Q&A platform like Quora can have services like User Service, Answer Service, Question Service, Search Service, and Recommendation Service, each service has a specific function and communicates with other services through well-defined interfaces making them independent of each other.

## Features

- Used Spring Boot as a backend framework
- Databased used - MongoDb and MySql
- Asyncronous Processing by Message Queue Kafka
- Managed Different Service Discovery by Netflix Eureka Server

## Micro-Services

- Quora QnA Service
- Quora Moderator Service
- User Service
- Load Balancer Api Gateway Service
- Admin Service
- Eureka Discovery Service

### Architecture

![Archietecture](https://iili.io/JKRStqX.png)
## Installation

- Install JAVA (17+)
- Install IntellJ
- Install MongoDB
- Intsall Mongo Compass
- Install MySql 
- Install DBreaver

#### Install Kafka on Docker by Docker Compose

```bash
services:
  kafka:
    ports:
      - 29094:29092
    image: confluentinc/cp-kafka:latest
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_LISTENERS: PLAINTEXT://:9092,PLAINTEXT_HOST://:29092
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://127.0.0.1:29094
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
    depends_on:
      - zookeeper
    networks: 
      - kafka_network
  zookeeper:
    ports:
      - 32181:2181
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
    image: confluentinc/cp-zookeeper:latest
    networks: 
      - kafka_network
networks:
  kafka_network:
    name: kafka_docker_example_net
```

#### Start Service : 
```
docker-compose up
```

#### Connect with Network : 
```
docker network connect kafka_docker_example_net spark-up-spark-master-1
```
## API Reference of Quora QnA Service

#### Get posts of a user

```http
  GET /userspost/getPost/{id}
```

| Route-value | Type     | Description                |
| :-------- | :------- | :------------------------- |
| `id` | `string` | **Required**. User id of Quora User|

#### Get all posts

```http
  GET /userspost/getAllPost
```

#### Add new Post by a user

```http
  POST /userspost/addPost
```

#### Update a posts of a user

```http
  POST /userspost/updatePost/{id}
```

| Request Value | Type     | Description                |
| :-------- | :------- | :------------------------- |
| `id` | `string` | **Required**. User id of Quora User

## Upcoming Live Cohort on 
# Learn Backend Engineering in JAVA Spring Framework

[Know Here](https://events.programmingpathshala.com/Events/76)

Quora-Microservices

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