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package org.glassfish.internal.api;
import com.sun.enterprise.module.ModulesRegistry;
import com.sun.enterprise.module.single.StaticModulesRegistry;
import org.jvnet.hk2.annotations.Service;
import org.glassfish.common.util.Constants;
import org.glassfish.hk2.api.Rank;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.runlevel.RunLevel;
import com.sun.enterprise.config.serverbeans.ConfigBeansUtilities;
import javax.inject.Inject;
import javax.inject.Singleton;
/**
* Very sensitive class, anything stored here cannot be garbage collected
*
* @author Jerome Dochez
*/
@Service(name = "globals")
@Singleton
public class Globals {
private static volatile ServiceLocator defaultHabitat;
private static Object staticLock = new Object();
// dochez : remove this once we can get rid of ConfigBeanUtilities class
@SuppressWarnings("unused")
@Inject
private ConfigBeansUtilities utilities;
@Inject
private Globals(ServiceLocator habitat) {
defaultHabitat = habitat;
}
public static ServiceLocator getDefaultBaseServiceLocator() {
return getDefaultHabitat();
}
public static ServiceLocator getDefaultHabitat() {
return defaultHabitat;
}
public static <T> T get(Class<T> type) {
return defaultHabitat.getService(type);
}
public static void setDefaultHabitat(final ServiceLocator habitat) {
defaultHabitat = habitat;
}
public static ServiceLocator getStaticBaseServiceLocator() {
return getStaticHabitat();
}
public static ServiceLocator getStaticHabitat() {
if (defaultHabitat == null) {
synchronized (staticLock) {
if (defaultHabitat == null) {
ModulesRegistry modulesRegistry = new StaticModulesRegistry(Globals.class.getClassLoader());
defaultHabitat = modulesRegistry.createServiceLocator("default");
}
}
}
return defaultHabitat;
}
/**
* The point of this service is to ensure that the Globals
* service is properly initialized by the RunLevelService
* at the InitRunLevel. However, Globals itself must be
* of scope Singleton because it us used in contexts where
* the RunLevelService is not there
*
* @author jwells
*
*/
@Service
@RunLevel(value=(InitRunLevel.VAL - 1), mode=RunLevel.RUNLEVEL_MODE_NON_VALIDATING)
public static class GlobalsInitializer {
@SuppressWarnings("unused")
@Inject
private Globals globals;
}
}