In Proxy why we want to have 2 classes, when decompiling the proxy class the real class can be visualized. so what is the real use?
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startup Blazor server side
I already tried to register classes in scoped but it doesn't work
class where I send data to another class following the mvvm architecture
I also use iprovider service but in the same way I can't make it work.
class container
class where I implement the IServiceProvider
I have been working with for a while but somehow never thought about this. Every aem project that I have worked on, has one similarity in their code structure. There is an interface for every service written.
My question is why do we need a interface for every service?
Can #reference or #inject not use the services without an interface?
Using interfaces is a good practice to decouple the user of a service from the implementation. In many cases you even want to have an API bundle so the user of the service does not need a maven dependency to the implementing bundle.
On the other hand you are not required to use interfaces. Especially when I wire components inside a bundle interfaces are often an unnecessary layer. In this case simply export the service directly with the class.
See here for an example:
#Component(service = DistributionMetricsService.class)
public class DistributionMetricsService {
...
}
and here for the client code:
#Reference
private DistributionMetricsService distributionMetricsService;
So the main difference is that you have to specify the service property if you want to export a component with its implementation class.
I am trying to Create Class Diagram for my Web Application but i dont know how to Represent Database Connection and REST API in Class diagrams.
P.S. I am Creating Class Diagram by following model view controller pattern.
A class is a class
In your class diagrams, you model classes of your system. And all the classes look alike:
a database connection would be a class like another, that will keep some properties about the database context and offer methods for connecting to and disconnecting from a given database.
a REST API class would be a class (or a set of classes) like any other. If you're the API consumer you would certainly have no properties in these classes (because REST is stateless and properties create a state). You could for example have a method for every service you could invoke.
Conceptually speaking theses classes in your system are proxies for something which is out of your system, and which would invoke the APIs provided by the database and the webservice.
But perhaps you want to model something else ?
If your system offers an API, and you want to show how the API offered to the external world relates to your internal classes, you could be interested in using a composite structure diagram.
If you want to show the different components if your system, especially how these are wired together using an API, you could be interested in the component diagram.
If your question is not so much about the structure of the classes and the deeper internals of your system, but more about showing that some part are on remote servers or in containers, you could even think of deployment diagrams. But these are more about the concrete layout of the operating infrastructure, and to link it to the classes, you'd need the component diagrams first.
I’m using GWT 2.5, and RPC to exchange information between client and server.
I’m trying to define the interface that extends RemoteService and another one CRUDService<T> that has among others (CRUD methods) the following method:
public Class<T> getDtoType();
But this method is only intended to be user by the implementation, on the server side.
Is there a way not to expose this method to client side (transient method)?
Otherwise I’m getting an error, when I compile the project, saying Class<T> does not implements Serializable nor IsSerializable.
Could anyone help me?
Not possible. Atleast not without hacking gwt-dev and rpc related code for service proxy generation.
1) SampleService extends RemoteService, CrudService<String>
2) SampleService extends CrudService<String> ( where CrudService extends RemoteService )
In both above scenarios Async Interface cribs first. If you fix it then GWT proxy generators crib about Serialization interface.
I have class in server side and I want use method of this class in client side. How can I do it?
Thanks!
You have to look at the basics of how the communication of the client application works with the server.
All server side functionality has to be exposed as a service/RPC based functionality in GWT.
If you look at the tutorial at http://code.google.com/webtoolkit/doc/1.5/tutorial/RPC.html, you have to do the following.
For your requirement, you have to create another method (except the methods you already have created), so do the following:
Define the service – in the interface which extends RemoteService interface
Implementing the service – in the class which extends RemoteServiceServlet class and implements the service defined interface
Implements the server-side – in the class which extends RemoteServiceServlet and implements the service defined interface
Hope this would help.