Package org.springframework.boot.autoconfigure

Class BackgroundPreinitializer

java.lang.Object

org.springframework.boot.autoconfigure.BackgroundPreinitializer

All Implemented Interfaces:

EventListener, org.springframework.context.ApplicationListener<org.springframework.boot.context.event.SpringApplicationEvent>, org.springframework.core.Ordered

public class BackgroundPreinitializer
extends Object
implements org.springframework.context.ApplicationListener<org.springframework.boot.context.event.SpringApplicationEvent>, org.springframework.core.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

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(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 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 org.springframework.core.Ordered

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>