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package org.glassfish.cdi.hk2;
import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.AfterDeploymentValidation;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.InjectionTarget;
import javax.enterprise.inject.spi.ProcessInjectionTarget;
import javax.inject.Singleton;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.DynamicConfiguration;
import org.glassfish.hk2.api.DynamicConfigurationService;
import org.glassfish.hk2.api.Injectee;
import org.glassfish.hk2.api.PerLookup;
import org.glassfish.hk2.api.ServiceLocator;
/**
* The touch-point for hk2 integration with CDI
*
* @author jwells
*
*/
public class HK2IntegrationExtension implements Extension {
private final HashMap<Long, ActiveDescriptor<?>> foundWithHK2 = new HashMap<Long, ActiveDescriptor<?>>();
private final ServiceLocator locator = HK2IntegrationUtilities.getApplicationServiceLocator();
/**
* Called by CDI, gathers up all of the injection points known to hk2
*
* @param pit The injection target even from CDI
*/
@SuppressWarnings("unused")
private <T> void injectionTargetObserver(@Observes ProcessInjectionTarget<T> pit) {
if (locator == null) return;
InjectionTarget<?> injectionTarget = pit.getInjectionTarget();
Set<InjectionPoint> injectionPoints = injectionTarget.getInjectionPoints();
for (InjectionPoint injectionPoint : injectionPoints) {
Injectee injectee = HK2IntegrationUtilities.convertInjectionPointToInjectee(injectionPoint);
ActiveDescriptor<?> descriptor = locator.getInjecteeDescriptor(injectee);
if (descriptor == null) continue;
// using a map removes duplicates
foundWithHK2.put(descriptor.getServiceId(), descriptor);
}
}
/**
* Called by CDI after going through all of the injection points. For each
* service known to hk2 adds a CDI bean
*
* @param abd This is used just to mark the type of the event
*/
@SuppressWarnings({ "unused", "unchecked", "rawtypes" })
private void afterDiscoveryObserver(@Observes AfterBeanDiscovery abd) {
if (locator == null) return;
HashSet<Class<? extends Annotation>> customScopes = new HashSet<Class<? extends Annotation>>();
for (ActiveDescriptor<?> descriptor : foundWithHK2.values()) {
abd.addBean(new HK2CDIBean(locator, descriptor));
customScopes.add(descriptor.getScopeAnnotation());
}
customScopes.remove(PerLookup.class);
customScopes.remove(Singleton.class);
List<org.glassfish.hk2.api.Context> hk2Contexts = locator.getAllServices(org.glassfish.hk2.api.Context.class);
for (org.glassfish.hk2.api.Context hk2Context : hk2Contexts) {
if (!customScopes.contains(hk2Context.getScope())) {
continue;
}
abd.addContext(new HK2ContextBridge(hk2Context));
}
foundWithHK2.clear(); // No need to keep these references around
}
/**
* Called by CDI after it has been completely validated. Will add the JIT resolver to HK2
* with the BeanManager
*
* @param event This is just to mark the type of the event
* @param manager The manager that will be used to get references
*/
@SuppressWarnings("unused")
private void afterDeploymentValidation(@Observes AfterDeploymentValidation event) {
if (locator == null) return;
DynamicConfigurationService dcs = locator.getService(DynamicConfigurationService.class);
DynamicConfiguration config = dcs.createDynamicConfiguration();
config.addActiveDescriptor(CDISecondChanceResolver.class);
config.addActiveDescriptor(CDIContextBridge.class);
config.commit();
}
public String toString() {
return "HK2IntegrationExtension(" + locator + "," + System.identityHashCode(this) + ")";
}
}