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https://github.com/ashfaqbs/spring-boot-jpa-v3
https://github.com/ashfaqbs/spring-boot-jpa-v3
Last synced: 15 days ago
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- Host: GitHub
- URL: https://github.com/ashfaqbs/spring-boot-jpa-v3
- Owner: Ashfaqbs
- Created: 2024-07-21T07:24:11.000Z (4 months ago)
- Default Branch: main
- Last Pushed: 2024-10-21T17:01:30.000Z (about 1 month ago)
- Last Synced: 2024-10-23T03:51:33.637Z (29 days ago)
- Language: Java
- Size: 49 MB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
## Understanding db/jpa properties in springboot
```
-- from airbnb backend props
spring:
datasource:
type: com.zaxxer.hikari.HikariDataSource
hikari:
poolName: Hikari
auto-commit: false
data:
jpa:
repositories:
bootstrap-mode: deferred
jpa:
open-in-view: false
hibernate:
ddl-auto: validate
properties:
hibernate:
default_schema: airbnb_clone
-- ignore
liquibase:
contexts: dev
change-log: classpath:db/changelog/master.xml
default-schema: airbnb_clone
enabled: true
```
### **Datasource Configuration**
```yml
spring:
datasource:
type: com.zaxxer.hikari.HikariDataSource
hikari:
poolName: Hikari
auto-commit: false
```
- **type: com.zaxxer.hikari.HikariDataSource**: Specifies the use of `HikariCP` as the connection pool, which is a highly efficient and fast JDBC connection pooling library.
- **hikari.poolName: Hikari**: Sets the name of the Hikari connection pool.
- **hikari.auto-commit: false**: Disables auto-commit for database transactions, meaning changes to the database won't be committed until explicitly done.
### **JPA Data and Repositories**
```yml
spring:
data:
jpa:
repositories:
bootstrap-mode: deferred
```
- **repositories.bootstrap-mode: deferred**: The JPA repositories are initialized after the application context is fully started, which helps prevent issues with database initialization.
### **JPA and Hibernate Configuration**
```yml
spring:
jpa:
open-in-view: false
hibernate:
ddl-auto: validate
properties:
hibernate:
default_schema: airbnb_clone
```
- **open-in-view: false**: Disables the Open Session in View pattern, which keeps the Hibernate session open for the entire web request. Setting this to `false` is recommended in production to prevent issues like LazyInitializationException.
- **hibernate.ddl-auto: validate**: This ensures that Hibernate will validate the schema but not make any changes to it. If the schema doesn’t match, an error will be thrown.
- **hibernate.properties.default_schema: airbnb_clone**: Sets `airbnb_clone` as the default schema for Hibernate, so all database operations will use this schema.
### **Liquibase Configuration**
```yml
spring:
liquibase:
contexts: dev
change-log: classpath:db/changelog/master.xml
default-schema: airbnb_clone
enabled: true
# drop-first: true
```
- **liquibase.contexts: dev**: Liquibase will run database migrations within the `dev` context. Liquibase is a tool for database versioning and schema management.
- **change-log: classpath:db/changelog/master.xml**: Specifies the location of the Liquibase changelog file, which contains the database changesets.
- **default-schema: airbnb_clone**: Liquibase will apply changes to the `airbnb_clone` schema by default.
- **enabled: true**: Liquibase is enabled, so it will run on application startup.
- **drop-first: true** (commented): If uncommented, this would drop the existing database schema before applying changes. It's typically used in development but dangerous for production environments.