/**
* Returns the singleton application object matching the given {@code applicationClass} within
* the given {@code database}.
*/
@SuppressWarnings("unchecked")
public static <T extends Application> T getInstanceUsing(
Class<T> applicationClass, Database database) {
ObjectType type = database.getEnvironment().getTypeByClass(applicationClass);
Query<T> query =
Query.from(applicationClass).where("_type = ?", type.getId()).using(database);
T app = query.first();
if (app == null) {
DistributedLock lock =
DistributedLock.Static.getInstance(database, applicationClass.getName());
lock.lock();
try {
app = query.clone().noCache().first();
if (app == null) {
app = (T) type.createObject(null);
app.setName(type.getDisplayName());
app.saveImmediately();
return app;
}
} finally {
lock.unlock();
}
}
String oldName = app.getName();
String newName = type.getDisplayName();
if (!ObjectUtils.equals(oldName, newName)) {
app.setName(newName);
app.save();
}
return app;
}
public void save(T entity) {
entity.save();
}
