learn-foreign-languages

Describe

App for learning English

Screenshots

Frameworks and tools

Java&IDE: JDK8 Eclipse
Backend: Spring Boot, Spring Data, Spring Security
Frontend: Angular, Bootstrap
Database: mongoDB, redis
Build Tool: Gradle
Linux： Arch Linux
Other: Docker, Log4j, Spring Mail, google translator, Spring actuator

Start app

0. Get project

       $ git clone https://github.com/Bananiys202024/learn-foreign-languages
       cd learn-foreign-languages
   

1. Start back-end

       ./gradlew bootJar           
        docker-compose build
        docker-compose up
   

2. Start front-end

        cd client
        npm install
        ng serve --port 4203
   

3. Go to http://localhost:4203/

Tutorials "How use" with "Arch Linux"

Docker

Clear all started containers

        docker rm -f $(docker ps -a -q) 	

Start(long note)

        ./gradlew bootJar

        docker-compose build

        docker-compose up

Start(short note)

        ./gradlew bootJar;docker-compose build;docker-compose up;

or

        sudo ./gradlew bootJar;sudo docker-compose build;sudo docker-compose up;

Redis

Start

        redis-cli

Revise all keys

        redis-cli --scan --pattern '*'

Revise type of key "Anton"

        type Anton

Check TTL of key "mykey"

        TTL mykey  

Set TTL to key "mykey" in seconds

        EXPIRE mykey 10

Delete key "mykey"

        del mykey

Read hash key "mykey"

        HGETALL mykey

Redis Sets are unordered collections of strings. The SADD command adds new elements to a set. It's also possible to do a number of other operations against sets like testing if a given element already exists, performing the intersection, union or difference between multiple sets, and so forth. Following command create unordered collections "myset"

        sadd myset 1 2 3

Get sets or get unordered collections of strings "myset"

        smembers myset

Redis is free to return the elements in any order at every call This is a good time to introduce the set command that provides the number of elements inside a set. This is often called the cardinality of a set in the context of set theory, so the Redis command is called SCARD. Get number elements of set "myset"

         scard myset

Mongodb

Show all databases

        show dbs; 	

Use database "tongues"

       use tongues

Show tables

       show tables

Show content of table "users"

       db.users.find({})

Show content of table "users"

       db.users.find()

Show define content of table "users", only with value "Mortal" in column "username"

       db.users.find({"username": "Mortal"})

Show define content of table "users", only with value "Mortal" in column "username" and with value IamDisabledUser" in column email

       db.users.find({"email": "IamDisabledUser", "username":"Mortal"})

Get number of lines in table "users"

       db.users.count();

Revise content of table "users"

       db.users.find();

Drop database "tongues"

       use tongues       
       db.dropDatabase()

Access

Back-end: http://localhost:8083/
Front-end: http://localhost:4203/