T.I.L_220727

What’s New for Today

1. Java Spring Framework
   • DB Transaction
     • Applying Trasaction into application
     • Use Database lock
   • Spring Built-in Transaction
     • Limitations for jdbc dependence
       • using specific technique dependent methods –> disobeying DIP
       • Error leakage –> JDBC error needs to transformed to Spring Error
       • Too much repetition in codes
     • Transaction Manager
     • PlatformTransactionManager
2. Algorithm
   • 2021 카카오 코딩 테스트
     • 1차
       • 3
3. JPA Recap
   • Persistence Context
     • Lazy Loading
     • L1 cache
     • Lazy Writing(SQL)
     • Tracking Changes
   • Entity Life Cycle