In a spring bean is it possible to have a shutdown method which can use transactions? - spring

Question

In the destroy method of a spring bean I want to execute some queries to clean up some stuff in the database. Spring doesn't seem to allow this by any means I can find.
The error is always something like:
Invocation of destroy method failed on
bean with name 'someBean':
org.springframework.beans.factory.BeanCreationNotAllowedException:
Error creating bean with name
'transactionManager': Singleton bean
creation not allowed while the
singletons of this factory are in
destruction (Do not request a bean
from a BeanFactory in a destroy method
implementation!)
The following will tell spring to call shutdownDestroy after the bean is no longer needed. But, I get the above error when trying to use transactions.
<bean id="someId" name="someName" class="someClass"
destroy-method="shutdownDestroy"/>
The same is true when I enable common lifecycle annotations using:
<bean class="org.springframework. ... .CommonAnnotationBeanPostProcessor"/>
and then mark the method with #PreDestroy. That method can't use transactions either.
Is there any way to do this?
EDIT:
Thanks! I had the bean implement SmartLifecycle and adding the following and it works very nicely.
private boolean isRunning = false;
#Override
public boolean isAutoStartup() {return true;}
#Override
public boolean isRunning() {return isRunning;}
/** Run as early as possible so the shutdown method can still use transactions. */
#Override
public int getPhase() {return Integer.MIN_VALUE;}
#Override
public void start() {isRunning = true;}
#Override
public void stop(Runnable callback) {
shutdownDestroy();
isRunning = false;
callback.run();
}
#Override
public void stop() {
shutdownDestroy();
isRunning = false;
}

Answer 1

Interesting Question. I'd say you should be able to do it by letting your bean implement SmartLifeCycle.
That way, if your int getPhase(); method returns Integer.MAX_VALUE, it will be among the first to be called when the ApplicationContext finally shuts down.
Reference:
3.6.1.5 Startup and shutdown
callbacks
SmartLifeCycle javadocs

Answer 2

I come across this same issue. After check spring's source code, U can try to implements
public class SomeBean implements ApplicationListener<ContextClosedEvent> {
public void onApplicationEvent(ContextClosedEvent event) {
stopHook();
}
}
onApplicationEvent will be call before bean destory, you can check it on spring's org.springframework.context.support.AbstractApplicationContext#doClose method. I paste it below, so ContextEvent -> LifeCycle -> Bean destory.
try {
// Publish shutdown event.
publishEvent(new ContextClosedEvent(this));
}
catch (Throwable ex) {
logger.warn("Exception thrown from ApplicationListener handling ContextClosedEvent", ex);
}
// Stop all Lifecycle beans, to avoid delays during individual destruction.
try {
getLifecycleProcessor().onClose();
}
catch (Throwable ex) {
logger.warn("Exception thrown from LifecycleProcessor on context close", ex);
}
// Destroy all cached singletons in the context's BeanFactory.
destroyBeans();
// Close the state of this context itself.
closeBeanFactory();
// Let subclasses do some final clean-up if they wish...
onClose();