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added 5 structural problems in Readme.md

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schrom01 2022-04-16 23:38:32 +02:00
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Uebung-hk1-Schrom01-Fassband-Brandleo
#most important Problems
#Most important Problems
## Our 5 most important functional Errors
###1. Multiple Server Connections not possible (Issue [#4](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/4))
If a client was connected to the server, it was not possible to connect another client. The Server created a new instance of ServerConnectionHandler which was in a endless loop to receive data.
@ -38,21 +38,26 @@ The message field is cleared if the method message of the connection handler ret
## Our 5 most important structural problems
###1. Data Class Message (Issues [#14](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/14), [#49](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/49))
The class MessageList had multiple List objects to save the different informations about a message. We created a Message Class which will be stored in a Array List in the MessageList instance and can also be sent from the server to a client and from a client to the server.
<br>
The new class message contains the datafields type, sender, receiver, text and also the enum with the different data types. We also added a method to check if a message matches a filter, which can be used in the method getFilteredMessages in MessageList.
###2. ClientConnectionHandler and ServerConnectionHandler have a lot in common (Issue [#11](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/11))
We created a superclass Connectionhandler to remove code dupplication. Common datafields and method "sendData" are now in superclass and can be used in ServerConnectionHandler and ClientConnectionHandler.
###3. Creation of instances of ClientMessageList and ClientConnectionHandler (Issues [#18](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/18)[#24](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/24)), [#24](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/24))
The instances of ClientMessageList and ClientConnectionHandler had been created and stored only in ChatwindowController. Those Classes are acting as model in our application. The should not be created in a window controller. So we created methods to set those objects in chat window controller and call those methods from clientUI Class.
###4. ClientConnectionHandler calls Methods on ChatWindowController to add new Messages (Issue [#23](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/23))
A Object of ChatWindowController was saved in ClientConnectionHandler and methods of window controller were called to add messages in the window. A Model should not call any methods of a window controller and should work without any controller object. We removed those method calls and added listeners to those properties in ChatWindowController to update the view if there are any changes in the models.
###5. ChatWindowController MessagePattern and method message (Issue [#17](https://github.zhaw.ch/PM2-IT21bWIN-ruiz-mach-krea/Uebung-hk1-Schrom01-Fassband-Brandleo/issues/17))
The Method "message" in ChatWindowController had a lot of logic in it and a MessagePattern object was saved in this class for that. We moved the logic to get the receiver and the message text into class ConnectionHandler, because the ConnectionHandler has to send the message to the server and it returns a boolean to give feedback if it was successful.
# Description of our solution
###Classdiagram of original handout
###Classdiagram of our new structure
![Classdiagram of this program](./Klassendiagramm.svg)
### Structure of Client:
The instances of ClientConnectionHandler and ClientMessageList are not created in the ChatWindowControllerClass anymore. It's created in the ClientUI Class and the ChatWindowController Class has access to them. This makes it possible for a client to have multiple windows open or close all windows without losing the message list or closing the connection.