StayFit Servers

Dependencies

java
node.js + npm (https://nodejs.org/en/)
mvn (https://maven.apache.org/)
pm2 (https://www.npmjs.com/package/pm2): npm install pm2 -g

Installation

Node.js dependencies installation

To install Node.js dependencies for Load_Balancer and Server_Amazon, go in each of these directories and execute:

npm install

MySQL Database

Database name: stayfit
Database username: stayfit
Database password: stayfit

To initialize the MySQL Database, you can import the ./sql/stayfit.sql file. This file contains all the MySQL tables needed to execute the application properly.

MongoDB Database

Create a database named stayfit and then create two collections named user_history and user_diet in it.

Getting Started

To build .jar files and execute the Java and Node.js servers together, you can use ./start.sh -b. Instead, if you don't want to build, you can simply use ./start.sh.

The ./start.sh script contains the default host value of each server:

...

STAYFIT_SERVER_HOST="localhost:8080"
OAUTH2_SERVICE_HOST="localhost:8081"
LOAD_BALANCER_HOST="localhost:8070"

USER_SERVICE_HOST_1="localhost:8082"
USER_HISTORY_SERVICE_HOST_1="localhost:8083"
USER_DIET_SERVICE_HOST_1="localhost:8084"

USER_SERVICE_HOST_2="localhost:8092"
USER_HISTORY_SERVICE_HOST_2="localhost:8093"
USER_DIET_SERVICE_HOST_2="localhost:8094"

MYSQL_DATABASE_URL="jdbc:mysql://localhost:3306/stayfit?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC"
MONGODB_DATABASE_URL="localhost:27017"

...

Also, the ./start.sh script contains the default PORT value of each Monitor and for the Server_Amazon server:

# USER SERVICE 1
export PORT=8071
# USER SERVICE 2
export PORT=8072

# USER HISTORY SERVICE 1
export PORT=8073
# USER HISTORY SERVICE 2
export PORT=8074

# USER DIET SERVICE 1
export PORT=8075
# USER DIET SERVICE 2
export PORT=8076

# OAUTH2 SERVICE
export PORT=8077

# AMAZON API
export PORT=3000

# LOAD BALANCER
export PORT=8070

# PROSUMER
export PORT=8078

The ./Load_Balancer/index.js script contains also the host value of each Monitor and Java Server, that are:

...

// available hosts
let serviceHosts = {
  "/user/services/user": [
    { pm2: "http://localhost:8071", java: "http://localhost:8082" },
    { pm2: "http://localhost:8072", java: "http://localhost:8092" }
  ],
  "/user_history/services/user_history": [
    { pm2: "http://localhost:8073", java: "http://localhost:8083" },
    { pm2: "http://localhost:8074", java: "http://localhost:8093" }
  ],
  "/user_diet/services/user_diet": [
    { pm2: "http://localhost:8075", java: "http://localhost:8084" },
    { pm2: "http://localhost:8076", java: "http://localhost:8094" }
  ]
};

...

Usage Example

The MySQL Database contains already an User called admin with password admin1234.

To get an access token, we need to send a POST request to the Authorization Service (OAuth2) using this endpoint: http://localhost:8081/oauth/token:

Headers:
- Authorization: Basic c3ByaW5nLXNlY3VyaXR5LW9hdXRoMi1yZWFkLXdyaXRlLWNsaWVudDpzcHJpbmctc2VjdXJpdHktb2F1dGgyLXJlYWQtd3JpdGUtY2xpZW50LXBhc3N3b3JkMTIzNA
- Content-Type: application/x-www-form-urlencoded
Body (x-www-form-urlencoded):
- grant_type: password
- username: admin
- password: admin1234
- cliend_id: spring-security-oauth2-read-write-client

Where Authorization: Basic uses these credentials base64 encoded:

Username: spring-security-oauth2-read-write-client
Password: spring-security-oauth2-read-write-client-password1234

The response will be something like:

{
    "access_token": "a2722351-8b9a-40ef-bd39-3fa6331a8cf1",
    "token_type": "bearer",
    "refresh_token": "404672eb-a9da-48a1-9964-9f5eb755ec2a",
    "expires_in": 10799,
    "scope": "read write"
}

After that, we can test our REST API using the access_token. For example we want to get information about User with id 1. In this case, we need to send a GET request to the Coordinator (Prosumer) using this endpoint: http://localhost:8080/api/v1/users/1:

Headers:
- Authorization: Bearer Token a2722351-8b9a-40ef-bd39-3fa6331a8cf1

The response will be something like:

{
    "id": 1,
    "username": "admin",
    "email": "admin@gmail.com",
    "enabled": true,
    "gender": true,
    "height": 175,
    "weight": 68,
    "birthDate": "1994-11-13T23:00:00.000+0000",
    "roles": [
        {
            "id": 1,
            "name": "ROLE_ADMIN"
        }
    ]
}

Load Testing

To execute a load testing, we use Artillery (https://artillery.io/), that is a modern, powerful & easy-to-use load testing and functional testing toolkit. To install artillery, you need to run npm install -g artillery.

Before you run the load test, you need to set the Authorization: Bearer Token in the config section of ./Load_Balancer/test.yml. After that, we can use this tool to run the load test ./Load_Balancer/test.yml. Simply, run the command artillery run ./Load_Balancer/test.yml.

As Artillery runs the test, an intermediate report will be printed to the terminal every 10 seconds, followed by an aggregate report at the end of the test.

An aggregate report will look similar to this:

All virtual users finished
Summary report @ 14:28:15(+0100) 2019-03-01
  Scenarios launched:  2947
  Scenarios completed: 2947
  Requests completed:  2947
  RPS sent: 26.15
  Request latency:
    min: 25.4
    max: 7116.2
    median: 728.6
    p95: 2664.8
    p99: 3397.7
  Scenario counts:
    0: 729 (24.737%)
    1: 705 (23.923%)
    2: 748 (25.382%)
    3: 765 (25.959%)
  Codes:
    200: 2947

See https://artillery.io/docs/getting-started/ for more details.

pichillilorenzo / StayFitServer