相关源码注释
Spring 5 SimpleAliasRegistry 源码注释 Spring 5 DefaultSingletonBeanRegistry 源码注释 Spring 5 FactoryBeanRegistrySupport 源码注释 Spring 5 AbstractBeanFactory 源码注释 Spring 5 AbstractAutowireCapableBeanFactory 源码注释 Spring 5 DefaultLisbaleBeanFactory 源码注释
UML类图
源码
public abstract class FactoryBeanRegistrySupport extends DefaultSingletonBeanRegistry {
private final Map
<String, Object> factoryBeanObjectCache
= new ConcurrentHashMap<>(16);
@Nullable
protected Class
<?> getTypeForFactoryBean(final FactoryBean
<?> factoryBean
) {
try {
if (System
.getSecurityManager() != null
) {
return AccessController
.doPrivileged((PrivilegedAction
<Class
<?>>)
factoryBean
::getObjectType
, getAccessControlContext());
}
else {
return factoryBean
.getObjectType();
}
}
catch (Throwable ex
) {
logger
.info("FactoryBean threw exception from getObjectType, despite the contract saying " +
"that it should return null if the type of its object cannot be determined yet", ex
);
return null
;
}
}
@Nullable
protected Object
getCachedObjectForFactoryBean(String beanName
) {
return this.factoryBeanObjectCache
.get(beanName
);
}
protected Object
getObjectFromFactoryBean(FactoryBean
<?> factory
, String beanName
, boolean shouldPostProcess
) {
if (factory
.isSingleton() && containsSingleton(beanName
)) {
synchronized (getSingletonMutex()) {
Object object
= this.factoryBeanObjectCache
.get(beanName
);
if (object
== null
) {
object
= doGetObjectFromFactoryBean(factory
, beanName
);
Object alreadyThere
= this.factoryBeanObjectCache
.get(beanName
);
if (alreadyThere
!= null
) {
object
= alreadyThere
;
}
else {
if (shouldPostProcess
) {
if (isSingletonCurrentlyInCreation(beanName
)) {
return object
;
}
beforeSingletonCreation(beanName
);
try {
object
= postProcessObjectFromFactoryBean(object
, beanName
);
}
catch (Throwable ex
) {
throw new BeanCreationException(beanName
,
"Post-processing of FactoryBean's singleton object failed", ex
);
}
finally {
afterSingletonCreation(beanName
);
}
}
if (containsSingleton(beanName
)) {
this.factoryBeanObjectCache
.put(beanName
, object
);
}
}
}
return object
;
}
}
else {
Object object
= doGetObjectFromFactoryBean(factory
, beanName
);
if (shouldPostProcess
) {
try {
object
= postProcessObjectFromFactoryBean(object
, beanName
);
}
catch (Throwable ex
) {
throw new BeanCreationException(beanName
, "Post-processing of FactoryBean's object failed", ex
);
}
}
return object
;
}
}
private Object
doGetObjectFromFactoryBean(final FactoryBean
<?> factory
, final String beanName
)
throws BeanCreationException
{
Object object
;
try {
if (System
.getSecurityManager() != null
) {
AccessControlContext acc
= getAccessControlContext();
try {
object
= AccessController
.doPrivileged((PrivilegedExceptionAction
<Object>) factory
::getObject
, acc
);
}
catch (PrivilegedActionException pae
) {
throw pae
.getException();
}
}
else {
object
= factory
.getObject();
}
}
catch (FactoryBeanNotInitializedException ex
) {
throw new BeanCurrentlyInCreationException(beanName
, ex
.toString());
}
catch (Throwable ex
) {
throw new BeanCreationException(beanName
, "FactoryBean threw exception on object creation", ex
);
}
if (object
== null
) {
if (isSingletonCurrentlyInCreation(beanName
)) {
throw new BeanCurrentlyInCreationException(
beanName
, "FactoryBean which is currently in creation returned null from getObject");
}
object
= new NullBean();
}
return object
;
}
protected Object
postProcessObjectFromFactoryBean(Object object
, String beanName
) throws BeansException
{
return object
;
}
protected FactoryBean
<?> getFactoryBean(String beanName
, Object beanInstance
) throws BeansException
{
if (!(beanInstance
instanceof FactoryBean)) {
throw new BeanCreationException(beanName
,
"Bean instance of type [" + beanInstance
.getClass() + "] is not a FactoryBean");
}
return (FactoryBean
<?>) beanInstance
;
}
@Override
protected void removeSingleton(String beanName
) {
synchronized (getSingletonMutex()) {
super.removeSingleton(beanName
);
this.factoryBeanObjectCache
.remove(beanName
);
}
}
@Override
protected void clearSingletonCache() {
synchronized (getSingletonMutex()) {
super.clearSingletonCache();
this.factoryBeanObjectCache
.clear();
}
}
protected AccessControlContext
getAccessControlContext() {
return AccessController
.getContext();
}
}
