org.glassfish.appclient.client.acc.ACCModulesManager Maven / Gradle / Ivy
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package org.glassfish.appclient.client.acc;
import com.sun.enterprise.module.ModulesRegistry;
import com.sun.enterprise.module.bootstrap.StartupContext;
import com.sun.enterprise.module.single.StaticModulesRegistry;
import com.sun.enterprise.naming.impl.ClientNamingConfiguratorImpl;
import com.sun.hk2.component.ExistingSingletonInhabitant;
import java.net.URISyntaxException;
import java.util.Collection;
import org.glassfish.api.admin.ProcessEnvironment;
import org.glassfish.api.naming.ClientNamingConfigurator;
import org.glassfish.internal.api.Globals;
import org.jvnet.hk2.component.Habitat;
import org.jvnet.hk2.component.Inhabitant;
/**
* Encapsulates details of preparing the HK2 habitat while also providing
* a "main" HK2 module the HK2 bootstrap logic can start.
*
* The HK2 habitat must be initialized before any AppClientContainer can be
* created, because each ACC is an HK2 service so it can use injection. The
* AppClientContainerBuilder uses the habitat directly (without injection)
* to create new ACCs. Part of initializing the habitat involves (at least
* currently) finding and starting a "main HK2 module." This class serves
* that purpose, even though this class is not the main program. To support
* embedded ACCs we do not assume we provide the actual main program, but we
* seem to need to offer a main module to HK2. So this class implements
* ModuleStartup even though it does little.
*
* @author tjquinn
*/
public class ACCModulesManager /*implements ModuleStartup*/ {
private static Habitat habitat = null;
public synchronized static void initialize(final ClassLoader loader) throws URISyntaxException {
/*
* The habitat might have been initialized earlier. Currently
* we use a single habitat for the JVM.
*/
if (habitat == null) {
habitat = prepareHabitat(
loader);
/*
* Set up the default habitat in Globals as soon as we know
* which habitat we'll use.
*/
Globals.setDefaultHabitat(habitat);
/*
* Remove any already-loaded startup context so we can replace it
* with the ACC one.
*/
habitat.removeAllByType(StartupContext.class);
StartupContext startupContext = new ACCStartupContext();
habitat.add(new ExistingSingletonInhabitant(StartupContext.class, startupContext));
/*
* Following the example from AppServerStartup, remove any
* pre-loaded lazy inhabitant for ProcessEnvironment that exists
* from HK2's scan for services. Then add in
* an ACC ProcessEnvironment.
*/
Inhabitant inh =
habitat.getInhabitantByType(ProcessEnvironment.class);
if (inh!=null) {
habitat.remove(inh);
}
habitat.add(new ExistingSingletonInhabitant
(new ProcessEnvironment(ProcessEnvironment.ProcessType.ACC)));
ProcessEnvironment env = habitat.getComponent(ProcessEnvironment.class);
/*
* Create the ClientNamingConfigurator used by naming.
*/
ClientNamingConfigurator cnc = new ClientNamingConfiguratorImpl();
habitat.add(new ExistingSingletonInhabitant(
ClientNamingConfigurator.class, cnc));
}
}
static Habitat getHabitat() {
return habitat;
}
public static T getComponent(Class c) {
return habitat.getComponent(c);
}
/**
* Sets up the HK2 habitat.
*
* Must be invoked at least once before an AppClientContainerBuilder
* returns a new AppClientContainer to the caller.
* @param classLoader
* @param logger
* @throws com.sun.enterprise.module.bootstrap.BootException
* @throws java.net.URISyntaxException
*/
private static Habitat prepareHabitat(
final ClassLoader loader) {
/*
* Initialize the habitat.
*/
ModulesRegistry registry = new StaticModulesRegistry(loader);
Habitat h = registry.createHabitat("default");
return h;
}
}