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package org.glassfish.jersey.server.internal;
import java.util.LinkedList;
import javax.ws.rs.core.Application;
import org.glassfish.jersey.internal.inject.Injections;
import org.glassfish.jersey.internal.inject.Providers;
import org.glassfish.jersey.server.ApplicationHandler;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.server.spi.AbstractContainerLifecycleListener;
import org.glassfish.jersey.server.spi.Container;
import org.glassfish.jersey.server.spi.ContainerLifecycleListener;
import org.glassfish.hk2.api.ServiceLocator;
import jersey.repackaged.com.google.common.collect.Iterables;
/**
* Helper class to provide some common functionality related to
* {@link org.glassfish.jersey.server.ResourceConfig application configuration}.
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
*/
public final class ConfigHelper {
/**
* Default port number for HTTP protocol.
*/
public static final int DEFAULT_HTTP_PORT = 80;
/**
* Default port number for HTTPS protocol.
*/
public static final int DEFAULT_HTTPS_PORT = 443;
/**
* Prevents instantiation.
*/
private ConfigHelper() {
}
/**
* Provides a single ContainerLifecycleListener instance based on the {@link ApplicationHandler application} configuration.
* This method looks for providers implementing {@link ContainerLifecycleListener} interface and aggregates them into
* a single umbrella listener instance that is returned.
*
* @param applicationHandler actual application from where to get the listener.
* @return a single instance of a ContainerLifecycleListener, can not be null.
*/
public static ContainerLifecycleListener getContainerLifecycleListener(final ApplicationHandler applicationHandler) {
final Iterable<ContainerLifecycleListener> listeners = Iterables.concat(
Providers.getAllProviders(applicationHandler.getServiceLocator(), ContainerLifecycleListener.class),
new LinkedList<ContainerLifecycleListener>() {{ add(new ServiceLocatorShutdownListener()); }});
return new ContainerLifecycleListener() {
@Override
public void onStartup(final Container container) {
for (final ContainerLifecycleListener listener : listeners) {
listener.onStartup(container);
}
}
@Override
public void onReload(final Container container) {
for (final ContainerLifecycleListener listener : listeners) {
listener.onReload(container);
}
}
@Override
public void onShutdown(final Container container) {
for (final ContainerLifecycleListener listener : listeners) {
listener.onShutdown(container);
}
}
};
}
/**
* Gets the most internal wrapped {@link Application application} class. This method is similar to
* {@link ResourceConfig#getApplication()} except if provided application was created by wrapping multiple
* {@link ResourceConfig} instances this method returns the original application and not a resource config wrapper.
*
* @return the original {@link Application} subclass.
*/
public static Application getWrappedApplication(Application app) {
while (app instanceof ResourceConfig) {
final Application wrappedApplication = ((ResourceConfig) app).getApplication();
if (wrappedApplication == app) {
break;
}
app = wrappedApplication;
}
return app;
}
private static class ServiceLocatorShutdownListener extends AbstractContainerLifecycleListener {
@Override
public void onShutdown(final Container container) {
final ApplicationHandler handler = container.getApplicationHandler();
final ServiceLocator locator = handler.getServiceLocator();
// Call @PreDestroy method on Application.
locator.preDestroy(getWrappedApplication(handler.getConfiguration()));
// Shutdown ServiceLocator.
Injections.shutdownLocator(locator);
}
}
}