/** Ensures that all additional files that this file requires are loaded. */
private void ensureAdditionalClassesLoaded(Class<?> clazz) {
if (!cache.isClassLoadedFromCache(clazz)) return;
if (!hasFileDependencyAnnotation(clazz)) return;
// we're here if annotation is present. We have to detect if all files are loaded.
//
// getting items where this class is registered.
//
String[] items = cache.getItemNames(clazz.getName());
// finding the item that we used to instantiate this class.
String usedItem = null;
if (items != null)
for (String item : items)
if (usedOffers.contains(item)) {
usedItem = item;
break;
}
//
// checking if files for this item were loaded.
//
ClassLoaderRequest request = null;
if (usedItem != null) {
String[] classesWithFiles = cache.getClassesWithFiles(usedItem);
if (classesWithFiles != null && Arrays.asList(classesWithFiles).contains(clazz.getName()))
return; // everything is fine, we loaded all necessary stuff.
request =
new ClassLoaderRequest(
clazz.getName(), new ClassLoaderOffer[] {cache.createOfferByItemName(usedItem)});
} else {
log.info(
"Class "
+ clazz.getName()
+ " has FileDependency annotation, but we could not detect the offer that this class was taken from. Asking from the client.");
request = new ClassLoaderRequest(clazz.getName());
}
// files were not loaded. asking client for the data for our class.
// Client will have to include files.
try {
ClassLoaderResponse response = (ClassLoaderResponse) mq.requestResponse(request, id);
ClassLoaderOffer acceptedOffer = response.getAcceptedOffer();
// updating the offer
if (acceptedOffer.hasFiles()) {
cache.registerOffer(acceptedOffer);
// unpacking and using it.
// we don't need class, just files. but let's do the whole sequence...
useOffer(null, acceptedOffer);
} else
log.info(
"Trying to load missing dependent files of class "
+ clazz.getName()
+ " we received offer without files. Nothing to load.");
} catch (JMSException | TimeoutException e) {
log.severe(
"Failed to load additional files for class "
+ clazz.getName()
+ " . Exception occured: "
+ e);
return;
}
}
