Taching Platform Introduction

Enviroment:

• Ubuntu: 16.04
• Java: 1.8
• Backend: Spring Boot, Spring Cloud(Nacos), MyBatis-Plus
• Database: MySQL, Redis
• Testing Tool: Swagger
• Member Authentication: JWT, Session
• Deploy: Docker, Docker Compose
• Dependency management: Maven

Install Docker & Docker Compose

• sudo apt-get update

• sudo apt-get install
  apt-transport-https
  ca-certificates
  curl
  gnupg-agent
  software-properties-common

• curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

• sudo apt-key fingerprint 0EBFCD88

• sudo add-apt-repository
  "deb [arch=amd64] https://download.docker.com/linux/ubuntu
  $(lsb_release -cs)
  stable"

• sudo apt-get update

• sudo apt-get install docker-ce docker-ce-cli containerd.io

• sudo apt install docker-compose

Install Redis

• docker pull redis
• docker run --name redis-lab -p 6379:6379 -d redis

ps -ef | grep redis
losf -i:6369

• vim pom.xml (common)

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

• vim application.properties(service_ucnter)

spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.database=0
spring.redis.timeout=1800000
spring.redis.lettuce.pool.max-active=20
spring.redis.lettuce.pool.max-wait=-1
spring.redis.lettuce.pool.max-idle=5
spring.redis.lettuce.pool.min-idle=0

• add cache

@Cacheable

Install MySQL

• sudo apt-get install mysql-server
• sudo apt install mysql-client
• sudo apt install libmysqlclient-dev
• sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf

# bind-address = 127.0.0.1

• mysql -u root -p

GRANT ALL PRIVILEGES ON spring.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;
flush privileges;  
exit;

• service mysql restart

How to install Nacos?

Concept : Register Center, Producer, Consumer

• You can download the latest version on https://github.com/alibaba/nacos/releases.

tar -xvf nacos-server-$version.tar.gz
cd nacos/bin
sudo sh startup.sh -m standalone

• Step1 : vim pom.xml(service)

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>

• step2: vim ./resources/application.properties

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
feign.hystrix.enabled=true
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=6000

• step3 : vim EduApplication.java

@EnableDiscoveryClient   # Producer
@EnableFeignClients      # Consumer

• step4 : vim ./client/VodApplication.java

@FeignClient(name = "service-vod", fallback = VodFileDegradeFeignClient.class)

• Website : http://127.0.0.1:8848/nacos/index.html

• Spring Cloud調用interface過程：

Feign(Service discovery) --> Hystrix --> Ribbon(Load balancing) --> Http Client gateway

• port: 8222

How to run JWT?

Concept: JWT consist of three parts separated by dots (.), which are: Header; Payload; Signature.

• vim pom.xml(common_utils)

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt</artifactId>
</dependency>

How to test API?

http://127.0.0.1:8080/swagger-ui.html