Getting reference from one bean to another dynamically - cdi

Question

Is it possible to get a reference from one #ApplicationScoped bean to another by dynamic way, some like JNDI lookup, or getBeanByName?
For example:
#ApplicationScoped
public class MaltiService {
#Inject
BeanManager mgr;
public JsonObject execute(JsonObject request, String taskClassName) {
// for eaxample taskClassName="com.mybean.MyTask"
// Does not work ...
Set<Bean<?> beans = mgr.getBeans(taskClassName);
.....
myTasksInterface.performTask();
}
}
#ApplicationScoped
public class MyTask implements MyTasksInterface {
public performTask() {
// Do something ....
}
}
Could somebody clarify, how to get bean reference by name or class or some another way.

Answer 1

Resolved.
The idea is to select Service Bean according to service name in the JSON request or according to some external configuration.
#Unremovable annotation prevents removing bean by Quarkus in case then it is not injected directly.
#ApplicationScoped
public class MaltiService {
#Inject
BeanManager mgr;
public JsonObject execute(JsonObject request, String taskClassName) {
MyTasksInterface myTasksInterface = getServiceBean(request.get("taskClassName"));
// do somthing
return myTasksInterface.performTask(JsonObject request);
}
//Method example to get a bean reference
private MyTasksInterface getServiceBean(String beanClassName) throws Exception {
ServiceJsonTask ret = null;
Class<?> clazz = Class.forName(beanClassName);
Set<Bean<?>> beans = mgr.getBeans(clazz);
if (beans != null && beans.iterator().hasNext()) {
Bean<?> bean = beans.iterator().next();
CreationalContext<?> ctx = mgr.createCreationalContext(bean);
ret = (ServiceJsonTask) mgr.getReference(bean, clazz, ctx);
}
return ret;
}
}
// Annotate bean as #Unremovable
#ApplicationScoped
#Unremovable
public class MyTask implements MyTasksInterface {
public JsonObject performTask(JsonObject request) {
JsonObject ret = new JsonObject();
// Do something ....
return ret;
}
}