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Perform enablement checks once in BackgroundPreinitializer

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Closes gh-22406
This commit is contained in:
Andy Wilkinson
2020-07-20 12:12:38 +01:00
parent 8a450c7906
commit 85828953bd
1 changed files with 12 additions and 8 deletions
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20
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/BackgroundPreinitializer.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -63,11 +63,19 @@ public class BackgroundPreinitializer implements ApplicationListener<SpringAppli
private static final CountDownLatch preinitializationComplete = new CountDownLatch(1);
private static final boolean ENABLED;
static {
ENABLED = !Boolean.getBoolean(IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME)
&& Runtime.getRuntime().availableProcessors() > 1;
}
@Override
public void onApplicationEvent(SpringApplicationEvent event) {
if (!Boolean.getBoolean(IGNORE_BACKGROUNDPREINITIALIZER_PROPERTY_NAME)
&& event instanceof ApplicationStartingEvent && multipleProcessors()
&& preinitializationStarted.compareAndSet(false, true)) {
if (!ENABLED) {
return;
}
if (event instanceof ApplicationStartingEvent && preinitializationStarted.compareAndSet(false, true)) {
performPreinitialization();
}
if ((event instanceof ApplicationReadyEvent || event instanceof ApplicationFailedEvent)
@@ -81,10 +89,6 @@ public class BackgroundPreinitializer implements ApplicationListener<SpringAppli
}
}
private boolean multipleProcessors() {
return Runtime.getRuntime().availableProcessors() > 1;
}
private void performPreinitialization() {
try {
Thread thread = new Thread(new Runnable() {