java - Model View Controller: Where to conditionally fetch new data into model? -


I have an Eclipse RCP application that has a view-patch that adheres to the Model-View-Controller (MVC) design is. The model is a catch-up of current data. Newsstand is a scene that listens for changes on the model and reloads the UI if necessary.

In my application logic, I want to get new data in a model, when a user selects entry from the list. Since the data is brought to a server, I am doing this to avoid using the Eclipse job framework in another thread to block the UI.

Now, I'm struggling to find the best place to build and start. Background jobs Do you have any recommendations on this? I look at two possible ways:

  • For this, in the Administrator , the controller will also need to hear changes in the model. When the new data is received, the administrator should inform and update the controller model; Or should I pass the reference of the model which automatically updates the model?
  • In the model . I have seen references that say that the data should be part of the fetching model. In this way I can directly control the model, which triggers conditions to load new data. This can be considered as a "business logic" but then I have the dependency on the eclipse interior within the model and hence it is no longer a standalone unit (hard test).
    • Edit: I know that MVC is rather loosely defined if I use the example for model-view-presenter design, then what answer is different Or would anyone be clear? There are slightly better defined responsibilities in the IMHO presenter in MVP.

I would say ...

selects the user list entry Is - & gt; Controller handles events - & gt; The controller starts a job, passing the model - & gt; Job update model - & gt; UI update based on change in model (if necessary)

My argument ...

Controller's role is to handle UI events - List entry selections from there , You are receiving data from the server and it is injected into the model. In my opinion, it should be kept different (i.e. external) from the model - for example, you can change the networking library without affecting the data model.


Comments

Post a Comment

Popular posts from this blog

python - Overriding the save method in Django ModelForm -

I'm having trouble overriding a ModelForm save method. I get this error I'm: Exception type: TypeErier Exception Value: Save () found an unexpected keyword argument 'committed' My intentions include a form 3 fields Submit several values ​​for, then create an object for each combination of those areas, and to save each object file models.py class collarsult type (models.Model): id = model. AutoField (db_column = 'icontact_result_code_type_id', primary_key = true) callResult = models.ForeignKey ( 'CallResult', db_column = 'icontact_result_code_id') campaign = models.ForeignKey ( 'campaign', db_column = 'icampaign_id') CALLTYPE = models.ForeignKey ( 'CALLTYPE', db_column = 'icall_type_id') agent = models.BooleanField (db_column = 'bagent', default = true) teamLeader = models.BooleanField (db_column = 'bTeamLeader', default = true) active = models.BooleanField (db_column = Django.form...
Read more

html - CSS autoheight, but fit content to height of div -

I have a div in which there are three children- div in the left and middle div: float: left while true: float: true because it is my layout Actually will spoil, I've used ClearFix Hack: .cf {zoom: 1; }. Cf: First,. Cf: {content: ""; Display: Table; }. Cf: After {clear: both; } It still works, but I want to be the right div an indicator. So it should fill 100% of the parent unit of height. How can I complete this? PS is the full code: & Lt; / Div & gt; & Lt; Div class = "mobile_content" & gt; & Lt; H5 & gt; {{Data.titel}} & lt; / H5> & Lt; Table & gt; & Lt; TR & gt; & Lt; Th & gt; Komponist: & lt; / Th & gt; & Lt; TD & gt; {{Data.komponist}} & lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; Th & gt; Instrument: & lt; / Th & gt; & Lt; TD & gt; {{Data.instrumente}} & lt; / TD & gt; & Lt; / TR & gt;...
Read more

qt - How to prevent QAudioInput from automatically boosting the master volume to 100%? -

I have been trying to use Qt5 multimedia to record audio with QAudioInput, however, when I see If QAudioInput is started, it increases the master volume of my sound device to 100%. How can I prevent QAudioInput from changing the master volume? My current development platform is Linux with PalsAdio (with flat audio disabled). How can I use QAudioInput : QAudioDeviceInfo device_info = QAudioDeviceInfo :: defaultInputDevice (); QAudio format format; Format.setSampleRate (44100); Format.setChannelCount (1); Format.setSampleSize (16); Format.setCodec ("Audio / PCM"); Format.setSampleType (QAudioFormat :: SignedInt); Format.setByteOrder (QAudioFormat :: LittleEndian); Std :: cout & lt; & Lt; Device_info.deviceName (). ToUtf8 (). ConstData () & lt; & Lt; Std :: endl; QAudioInput * default_device = new QAudioInput (device_info, format); QIODevice * default_io_device = default_device-> Start (); a QAudioInput.setVolume () method is not you I ...
Read more