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package org.glassfish.jersey.ext.cdi1x.internal;
import java.util.LinkedList;
import java.util.List;
import org.glassfish.jersey.ext.cdi1x.internal.spi.InjectionManagerInjectedTarget;
import org.glassfish.jersey.ext.cdi1x.internal.spi.InjectionManagerStore;
import org.glassfish.jersey.ext.cdi1x.internal.spi.InjectionTargetListener;
import org.glassfish.jersey.internal.inject.InjectionManager;
/**
* Generic {@link InjectionManagerStore injection manager store} that allows multiple
* injection managers to run in parallel. {@link #lookupInjectionManager()}
* method must be implemented that shall be utilized at runtime in the case that more than a single
* injection manager has been registered.
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
* @since 2.20
*/
public abstract class GenericInjectionManagerStore implements InjectionManagerStore, InjectionTargetListener {
private final List<InjectionManagerInjectedTarget> injectionTargets;
private volatile InjectionManager injectionManager;
private volatile boolean multipleInjectionManagers = false;
public GenericInjectionManagerStore() {
injectionTargets = new LinkedList<>();
}
@Override
public void registerInjectionManager(final InjectionManager injectionManager) {
if (!multipleInjectionManagers) {
if (this.injectionManager == null) { // first one
this.injectionManager = injectionManager;
} else { // second one
this.injectionManager = null;
multipleInjectionManagers = true;
} // first and second case
}
// pass the injection manager to registered injection targets anyway
for (final InjectionManagerInjectedTarget target : injectionTargets) {
target.setInjectionManager(injectionManager);
}
}
@Override
public InjectionManager getEffectiveInjectionManager() {
return !multipleInjectionManagers ? injectionManager : lookupInjectionManager();
}
/**
* CDI container specific method to obtain the actual injection manager
* belonging to the Jersey application where the current HTTP requests
* is being processed.
*
* @return actual injection manager.
*/
public abstract InjectionManager lookupInjectionManager();
@Override
public void notify(final InjectionManagerInjectedTarget target) {
injectionTargets.add(target);
}
}