Is It possible to support sync and async Application Events in Spring[5] - spring-async

Question

<bean id="applicationEventMulticaster"
class="com.test.listener.CustomApplicationEventMulticaster">
<property name="taskExecutor" >
<bean class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
<property name="maxPoolSize" value="10"/>
<property name="corePoolSize" value="10"/>
<property name="waitForTasksToCompleteOnShutdown" value="true"/>
<property name="awaitTerminationSeconds" value="200"/>
</bean>
</property>
</bean>
public class CustomApplicationEventMulticaster extends SimpleApplicationEventMulticaster {
#Override
public void multicastEvent(final ApplicationEvent event, ResolvableType eventType) {
boolean async = (event instanceof AbstractApplicationEvent) ? ((AbstractApplicationEvent) event).isAsyncEvent()
: true;
final SecurityContext sc = SecurityContextHolder.getContext();
ResolvableType defaultEventType = ResolvableType.forInstance(event);
for (final ApplicationListener listener : getApplicationListeners(event, defaultEventType)) {
Executor executor = getTaskExecutor();
if (async && executor != null) {
executor.execute(() -> {
try {
SecurityContextHolder.setContext(sc);
listener.onApplicationEvent(event);
} finally {
SecurityContextHolder.clearContext();
}
});
} else {
listener.onApplicationEvent(event);
}
}
}
}
In Application, I am trying to trigger sync and async event.
It is this fine to do?

Answer 1

executor.execute(() -> {
try {
SecurityContext emptyContext = SecurityContextHolder.createEmptyContext();
emptyContext.setAuthentication(sc.getAuthentication());
listener.onApplicationEvent(event);
} finally {
SecurityContextHolder.clearContext();
}
});