Package org.springframework.boot.autoconfigure

Class BackgroundPreinitializer

java.lang.Object

org.springframework.boot.autoconfigure.BackgroundPreinitializer

All Implemented Interfaces:

EventListener, ApplicationListener<SpringApplicationEvent>, Ordered

public class BackgroundPreinitializer
extends Object
implements ApplicationListener<SpringApplicationEvent>, Ordered

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

Author:

Phillip Webb, Andy Wilkinson, Artsiom Yudovin, Sebastien Deleuze

Field Summary

Fields

Modifier and Type	Field	Description
static final String	IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME	System property that instructs Spring Boot how to run pre initialization.

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
BackgroundPreinitializer()

Method Summary

Modifier and Type	Method	Description
int	getOrder()
void	onApplicationEvent(SpringApplicationEvent event)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

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 Details

BackgroundPreinitializer

public BackgroundPreinitializer()

Method Details

getOrder

public int getOrder()

Specified by:

getOrder in interface Ordered

onApplicationEvent

public void onApplicationEvent(SpringApplicationEvent event)

Specified by:

onApplicationEvent in interface ApplicationListener<SpringApplicationEvent>