BackgroundPreinitializer (Spring Boot API)

java.lang.Object
- org.springframework.boot.autoconfigure.BackgroundPreinitializer

All Implemented Interfaces:
EventListener, org.springframework.context.ApplicationListener<org.springframework.boot.context.event.SpringApplicationEvent>
```
@Order(-2147483627)
public class BackgroundPreinitializer
extends Object
implements org.springframework.context.ApplicationListener<org.springframework.boot.context.event.SpringApplicationEvent>
```
ApplicationListener to trigger early initialization in a background thread of time consuming tasks.
Set the IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME system property to true to disable this mechanism and let such initialization happen in the foreground.
Since:
1.3.0

- Field Summary
  Fields
  Modifier and Type Field Description
  static String IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME
  System property that instructs Spring Boot how to run pre initialization.
- Constructor Summary
  Constructors
  Constructor Description
  BackgroundPreinitializer()
- Method Summary
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  void onApplicationEvent(org.springframework.boot.context.event.SpringApplicationEvent event)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME
```
public static final String IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME
```
    System property that instructs Spring Boot how to run pre initialization. When the property is set to true, no pre-initialization happens and each item is initialized in the foreground as it needs to. When the property is false (default), pre initialization runs in a separate thread in the background.
    Since:
    2.1.0
    See Also:
    Constant Field Values
- Constructor Detail
  - BackgroundPreinitializer
```
public BackgroundPreinitializer()
```
- Method Detail
  - onApplicationEvent
```
public void onApplicationEvent(org.springframework.boot.context.event.SpringApplicationEvent event)
```
    Specified by:
    onApplicationEvent in interface org.springframework.context.ApplicationListener<org.springframework.boot.context.event.SpringApplicationEvent>