154      */
 155     public static ServicesCatalog getServicesCatalogOrNull(ClassLoader loader) {
 156         return CLV.get(loader);
 157     }
 158 
 159     /**
 160      * Returns the ServicesCatalog for the given class loader, creating it if
 161      * needed.
 162      */
 163     public static ServicesCatalog getServicesCatalog(ClassLoader loader) {
 164         // CLV.computeIfAbsent(loader, (cl, clv) -> create());
 165         ServicesCatalog catalog = CLV.get(loader);
 166         if (catalog == null) {
 167             catalog = create();
 168             ServicesCatalog previous = CLV.putIfAbsent(loader, catalog);
 169             if (previous != null) catalog = previous;
 170         }
 171         return catalog;
 172     }
 173 







 174     // the ServicesCatalog registered to a class loader
 175     private static final ClassLoaderValue<ServicesCatalog> CLV = new ClassLoaderValue<>();
 176 }

 154      */
 155     public static ServicesCatalog getServicesCatalogOrNull(ClassLoader loader) {
 156         return CLV.get(loader);
 157     }
 158 
 159     /**
 160      * Returns the ServicesCatalog for the given class loader, creating it if
 161      * needed.
 162      */
 163     public static ServicesCatalog getServicesCatalog(ClassLoader loader) {
 164         // CLV.computeIfAbsent(loader, (cl, clv) -> create());
 165         ServicesCatalog catalog = CLV.get(loader);
 166         if (catalog == null) {
 167             catalog = create();
 168             ServicesCatalog previous = CLV.putIfAbsent(loader, catalog);
 169             if (previous != null) catalog = previous;
 170         }
 171         return catalog;
 172     }
 173 
 174     static void setServicesCatalog(ClassLoader loader, ServicesCatalog catalog) {
 175         ServicesCatalog previous = CLV.putIfAbsent(loader, catalog);
 176         if (previous != null) {
 177             throw new RuntimeException("unexpected: " + previous);
 178         }
 179     }
 180 
 181     // the ServicesCatalog registered to a class loader
 182     private static final ClassLoaderValue<ServicesCatalog> CLV = new ClassLoaderValue<>();
 183 }