Spring boot advance 1

Cache (Redis)

Run

App

#---------------------------
# Run app
#---------------------------

# build
mvn package

# run
java -jar <built_jar>


#---------------------------
# Run Mysql
#---------------------------
brew services start mysql
mysql -u root

Redis (Docker)

#---------------------------
# Run Redis
#---------------------------

# Install Redis (Docker)
# https://hub.docker.com/_/redis
# https://www.youtube.com/watch?v=c3lLy3KCjYk&list=PLmOn9nNkQxJESDPnrV6v_aiFgsehwLgku&index=10
docker pull redis

# check pull images
docker images

# run Redis (Docker)
# -d : run in background
# -p : expose docker internal 6379 port to local machine's 6379 port 
# --name : name docker instance
# name of iamge we want to run
docker run -d -p 6379:6379 --name myredis redis

docker ps -a

redis-cli

# remove/stop container
docker stop <container_id>
docker rm  <container_id>

# basic command
# https://redis.io/commands/

# 1) String
# append to key (msg)
append msg hello
append msg world

# get by key
get msg

# 2) List
# push into list
LPUSH mylist 1 2 3

# pop element from list (from left, right)
LPOP mylist
RPOP mylist

# 3) Set
SADD myset tim jack

SMEMBERS myset

# 4) check is elment in a key
SISMEMBER myset lynn
SISMEMBER myset tim

RabbitMQ (Docker)

#---------------------------
# Run RabbitMQ
#---------------------------

# Install RabbitMQ (Docker)
# https://www.youtube.com/watch?v=IVjsiu0OrfQ&list=PLmOn9nNkQxJESDPnrV6v_aiFgsehwLgku&index=16
# management : has UI
docker pull rabbitmq:3.10-management

# check pull images
# account : guest, pwd: guest
docker images

# run Redis (Docker)
# -d : run in background
# -p : expose docker internal 6379 port to local machine's 6379 port 
# --name : name docker instance
# name of iamge we want to run
# 5672 : client, RabbitMQ port, 15672: UI port
docker run -d -p 5672:5672 -p 15672:15672 --name myrabbitmq <docker_img_id>

# visit RabbitMQ UI
# http://localhost:15672/

docker ps -a

# remove/stop container
docker stop <container_id>
docker rm  <container_id>

API

API	Type	Purpose	Example cmd	Comment
Employee
GET	GET	get employee by id	http://localhost:8888/emp/{id}, http://localhost:8888/emp/1	id=1 or 2 or 3...
POST	POST	update employee by id	http://localhost:8888/emp	id=xxx, lastName=yyy ...
GET	GET	delete employee by id	http://localhost:8888/delemp?id=1	id=1 or 2 or 3...
GET	GET	get employee by lastName	http://localhost:8888/lastname/{lastname}, http://localhost:8888/emp/lastname/Jill	lastname=Bob or Lily or Kim...
GET	GET	get dept by id	http://localhost:8888/dept/{id}, http://localhost:8888/dept/1	id=1 or 2 or 3...
POST	POST	add new employee	http://localhost:8888/emp/add?id=4&lastName=kkk&[email protected]&gender=1&dId=100
Test
GET	GET	test endpoint	http://localhost:8888/test

Important concept

• Cache
  • since Spring 3.1
    • org.springframwork.cache.Cache
      • cache implementation, define cache op
        • class : RedisCache, EhCacheCache, ConcurrentMapCache..
    • org.springframwork.cache.CacheManager
      • cache manager, manage cache components
    • @Cacheable
      • if implement on a method, then such method will have cache mechanism
    • @CacheEvict
      • clean cache
    • @CachePut
      • make sure method is called, put result to cache
    • @EnableCaching
      • enable cache (based on annotation)
    • @keyGenerator
      • generate key for cache
    • @serialize
      • serialization for cache value
    • 
    • ref
      • https://www.youtube.com/watch?v=puGukebF5E0&list=PLmOn9nNkQxJESDPnrV6v_aiFgsehwLgku&index=3

Ref

• Course
  • Material
    • video
      • https://www.youtube.com/watch?v=5zosKtv3-HA&list=PLmOn9nNkQxJESDPnrV6v_aiFgsehwLgku