| Package | Description | 
|---|---|
| org.springframework.boot.cloud | Low level support for Cloud deployments. | 
| org.springframework.boot.context | Classes related to Spring's  ApplicationContext. | 
| org.springframework.boot.context.config | External configuration support allowing 'application.properties' to be loaded and used
 within a Spring Boot application. | 
| org.springframework.boot.context.event | ApplicationEventstriggered by
 Spring Boot. | 
| org.springframework.boot.liquibase | Custom support for Liquibase database migration. | 
| Class and Description | 
|---|
| ApplicationPreparedEvent Event published as when a  SpringApplicationis starting up and theApplicationContextis fully prepared but not refreshed. | 
| Class and Description | 
|---|
| ApplicationEnvironmentPreparedEvent Event published when a  SpringApplicationis starting up and theEnvironmentis first available for inspection and modification. | 
| SpringApplicationEvent Base class for  ApplicationEventrelated to aSpringApplication. | 
| Class and Description | 
|---|
| ApplicationEnvironmentPreparedEvent Event published when a  SpringApplicationis starting up and theEnvironmentis first available for inspection and modification. | 
| Class and Description | 
|---|
| SpringApplicationEvent Base class for  ApplicationEventrelated to aSpringApplication. | 
| Class and Description | 
|---|
| ApplicationStartingEvent Event published as early as conceivably possible as soon as a  SpringApplicationhas been started - before theEnvironmentorApplicationContextis
 available, but after theApplicationListeners have been registered. | 
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