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Avoid wide locks in order to remove deadlock potential in case of multi-threaded singleton creation/destruction

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Issue: SPR-10020
Issue: SPR-8471
This commit is contained in:
Juergen Hoeller
2012-11-25 23:32:52 +01:00
parent 87b7e3d8cf
commit 52124fa31b
3 changed files with 55 additions and 49 deletions
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55
spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java
View File

@@ -576,35 +576,36 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
if (this.logger.isInfoEnabled()) {
this.logger.info("Pre-instantiating singletons in " + this);
}
List<String> beanNames;
synchronized (this.beanDefinitionMap) {
// Iterate over a copy to allow for init methods which in turn register new bean definitions.
// While this may not be part of the regular factory bootstrap, it does otherwise work fine.
List<String> beanNames = new ArrayList<String>(this.beanDefinitionNames);
for (String beanName : beanNames) {
RootBeanDefinition bd = getMergedLocalBeanDefinition(beanName);
if (!bd.isAbstract() && bd.isSingleton() && !bd.isLazyInit()) {
if (isFactoryBean(beanName)) {
final FactoryBean<?> factory = (FactoryBean<?>) getBean(FACTORY_BEAN_PREFIX + beanName);
boolean isEagerInit;
if (System.getSecurityManager() != null && factory instanceof SmartFactoryBean) {
isEagerInit = AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
public Boolean run() {
return ((SmartFactoryBean<?>) factory).isEagerInit();
}
}, getAccessControlContext());
}
else {
isEagerInit = (factory instanceof SmartFactoryBean &&
((SmartFactoryBean<?>) factory).isEagerInit());
}
if (isEagerInit) {
getBean(beanName);
}
beanNames = new ArrayList<String>(this.beanDefinitionNames);
}
for (String beanName : beanNames) {
RootBeanDefinition bd = getMergedLocalBeanDefinition(beanName);
if (!bd.isAbstract() && bd.isSingleton() && !bd.isLazyInit()) {
if (isFactoryBean(beanName)) {
final FactoryBean<?> factory = (FactoryBean<?>) getBean(FACTORY_BEAN_PREFIX + beanName);
boolean isEagerInit;
if (System.getSecurityManager() != null && factory instanceof SmartFactoryBean) {
isEagerInit = AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
public Boolean run() {
return ((SmartFactoryBean<?>) factory).isEagerInit();
}
}, getAccessControlContext());
}
else {
isEagerInit = (factory instanceof SmartFactoryBean &&
((SmartFactoryBean<?>) factory).isEagerInit());
}
if (isEagerInit) {
getBean(beanName);
}
}
else {
getBean(beanName);
}
}
}
}
@@ -650,9 +651,9 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
this.frozenBeanDefinitionNames = null;
}
this.beanDefinitionMap.put(beanName, beanDefinition);
resetBeanDefinition(beanName);
}
resetBeanDefinition(beanName);
}
public void removeBeanDefinition(String beanName) throws NoSuchBeanDefinitionException {
@@ -668,9 +669,9 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
}
this.beanDefinitionNames.remove(beanName);
this.frozenBeanDefinitionNames = null;
resetBeanDefinition(beanName);
}
resetBeanDefinition(beanName);
}
/**
@@ -685,9 +686,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
// Remove corresponding bean from singleton cache, if any. Shouldn't usually
// be necessary, rather just meant for overriding a context's default beans
// (e.g. the default StaticMessageSource in a StaticApplicationContext).
synchronized (getSingletonMutex()) {
destroySingleton(beanName);
}
destroySingleton(beanName);
// Remove any assumptions about by-type mappings
this.singletonBeanNamesByType.clear();

9
spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultSingletonBeanRegistry.java
View File

@@ -447,11 +447,12 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
this.singletonsCurrentlyInDestruction = true;
}
String[] disposableBeanNames;
synchronized (this.disposableBeans) {
String[] disposableBeanNames = StringUtils.toStringArray(this.disposableBeans.keySet());
for (int i = disposableBeanNames.length - 1; i >= 0; i--) {
destroySingleton(disposableBeanNames[i]);
}
disposableBeanNames = StringUtils.toStringArray(this.disposableBeans.keySet());
}
for (int i = disposableBeanNames.length - 1; i >= 0; i--) {
destroySingleton(disposableBeanNames[i]);
}
this.containedBeanMap.clear();