RESTful API server app with Java Spring Reactive Framework

A light-weight RESTful API server starter app built with Java Spring Reactive Framework, MongoDB, WebFlux and Gradle.

Features

• Containerised App with Docker
• NoSQL DB - MongoDB
• Metrics exposed. Easy intergration with prometheus and Grafana.
• SQL Version - Coming soon.

Running everything on Docker:

Using docker-compose run both mongoDB and the app as docker containers.

docker-compose up

Not familiar with Docker? No problem run it locally on your machine:

For this you will need to set up the MongoDB Locally on your machine(Refer the Local MongoDB Setup section towards the end.). Add the configurations in application.properties and run the below or use your fav IDE:

./gradlew clean build
./gradlew bootRun

Try the CRUD. Test the endPoints / REST APIs.

Once the server is running try to access the below APIs using cURL or POSTMAN or any tool that you are already using.

CREATE: POST /api/add

curl -X POST -d '{"name":"Giri Jeedigunta","email":"[email protected]"}' -H "Content-Type: application/json" http://localhost:4000/api/add -v

READ: GET /api/get

curl http://localhost:4000/api/get

GET /api/get/{email}

curl http://localhost:4000/api/get/{email}

UPDATE: POST /api/udpate/{id}

curl -X POST -d '{"name":"Giri J","email":"[email protected]"}' -H "Content-Type: application/json" http://localhost:4000/api/update/5f85c2c8b0abe7062019dd16

DELETE: POST /api/delete/{id}

curl -X POST http://localhost:4000/api/delete/5f85c2c8b0abe7062019dd16

Local MongoDB Setup(Mac OS):

If you are not familiar with docker. Follow these steps to setup MongoDB on your machine locally. Here I have instructions for Mac OS.

Easy MongoDB Installation:

brew tap mongodb/brew
brew install [email protected]

Starting MongoDB

brew services start [email protected]
or
mongod --config /usr/local/etc/mongod.conf --fork

Add User, DB and collections:

Use the below section to create user, db, collections etc,.

Creating User:

use admin;

db.createUser({
    user: "giri",
    pwd: "spring2020",
    roles:[
        {role: "dbAdmin", db:"springapi"}
    ]
});

Creating New Collection:

use springapi;

db.createCollection( "api", {
   validator: { $jsonSchema: {
      bsonType: "object",
      required: [ "name" ],
      properties: {
         name: {
            bsonType: "string",
            description: "must be a string and is required"
         },
         email: {
            bsonType : "string",
            description: "must be a string and match the regular expression pattern"
         }
      }
   } }
} );

Sample Data

db.api.insert({"name":"Giri Jeedigunta","email":"[email protected]"});

Adding Configuration to Java App:

Add all the MongoDB related config in a simple URI format like below in the application.properties file.

spring.data.mongodb.uri=mongodb://<Add_Your_UserName>:<Your_Password>@localhost:27017/<DB_NAME>?authSource=admin

// Example: 
spring.data.mongodb.uri=mongodb://giri:spring2020@localhost:27017/springapi?authSource=admin