Who does the glue?
Crossposted to algorithms forum.
I am writing an application using a Model-View-Presenter pattern. In these applications, who is responsible for "gluing" the pieces together? How is this glue logic tested?
For example, I am creating a login dialog box. It includes a view with the usual "username" and "password" text fields, and a "login" button. I have a presenter whose constructor takes an ILoginView interface object and an ILoginModel interface object. It sets itself up as the ActionListener for the login button, etc.
Who calls this constructor? How is that code tested?
Continuing on in the application, who creates other dialogs and their respective presenters and models?
Are you using Factories and replacing them at test time with versions that return mocks?
What about displaying errors? Suppose the user enters an invalid password. Who is responsible for showing a message box? How is this tested?
Thanks.
I am writing an application using a Model-View-Presenter pattern. In these applications, who is responsible for "gluing" the pieces together? How is this glue logic tested?Never heard of this pattern. Perhaps you meant Model-View-Controller?
>
For example, I am creating a login dialog box. It includes a view with the usual "username" and "password" text fields, and a "login" button. I have a presenter whose constructor takes an ILoginView interface object and an ILoginModel interface object. It sets itself up as the ActionListener for the login button, etc.
Who calls this constructor? How is that code tested?Your "bootstrap" class. The code that sets up the stage and then start the show.
The code (any code you write) should be tested with JUnit tests :)
>
Continuing on in the application, who creates other dialogs and their respective presenters and models?Same as above.
This "wiring" process of ensuring that all objects have their dependencies correctly setup could be done manually by you (writing the "glue" code in the bootstrap class) or by a DI container (like Spring, PicoContainer etc).
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Barry Myles wrote:
> Consider creating a connectionfactory (with server affinity unticked, load balancing
> ticked and using the message delivery policy of round robin) we then go on to
> create a distributed domain targetted at the cluster of two managed server's (managed1
> and managed2)
>
> If I create a simple java app that put's messages to that distributed destination,
> using the connectionfactory above, who's responsible for doing the load balancing.
>
> Does the client create the session knowing that the connectionfactory requires
> load balancing and thus takes the responsibility for it, or does the client just
> put a constant stream of JMS messages to the WLS and the connectionfactory class
> takes responsibility for the load balancing
>
> Who maintain's the delivery state, the client application or WLS (i.e who's job
> is it to look up the last messages queue destination?)
>
>
>
>
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I have a class Foo1 which implements java.io.Serializable.
I have another class which performs this function:
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>
For instance, what if there were violatile member
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Moderator message: not directly related to ABAP development, please have a look in the respective functional forum.
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