MVC mode is not easy to use? Why not try MOVE

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2012/07/25 08:51

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MVC mode The application in programming is a great idea. "Model" can encapsulate the data related to the business logic of the application and the processing method of the data; "View" can realize the purposeful display of data; "Controller" can play an organizational role at different levels and control the process of the application.

However, you may get confused in the process of using this three-tier architecture model. Because you don't know where to put a lot of code, you have to put it in the control layer. Finally, you find that there is too much code in the control layer.

LinkedIn Software Engineer Conrad Irwin He also encountered the same problem, so he began to use another mode: MOVE， That is, Models, Operations, Views, Events.

Conrad Irwin recently Personal blog Shared some views on this model.

summary

Irwin first gives a simple definition of MOVE mode in combination with the figure above:

Models， Encapsulates everything you know about the application;
Operations， Encapsulates everything the application needs to do;
Views， Help users interact with applications;
Events， Used to securely connect all these components.

In order to avoid spaghetti code, the figure shows which types of objects are allowed to operate. For example, views allow listening to events generated by the model; Operations allow you to modify the model, but the model should not involve views or operations.

Models

Here we take a "User" object as the prototype. It has at least one email address, and may also have a user name and phone number.

Only knowledge is packaged in a MOVE model. This means that in addition to the Get and Set functions, they can include such methods as checking whether the user's password is correct, but they will not include such functions as saving the password to the database or passing it to external APIs, because Operations will complete these tasks later.

Operations

For applications, a common operation is user login. This is actually composed of two sub operations: first, obtain the email address and password from the user, then load the "user" model from the database and check whether the password matches.

Operations is an actor in MOVE mode. It is responsible for modifying the model, displaying the correct view at the correct time, and responding to events triggered by user interaction. In a well decomposed application, each sub operation can run independently.

The operation in this way is very exciting, that is, after the program is started, the entire application itself can be regarded as an Operations. It generates as many sub operations as needed, each of which runs in parallel. When all sub operations are completed, the program exits.

Views

The login page is a view, which is responsible for displaying some text boxes to users. When the user clicks the "Login" button, the view will generate a "loginAttempt" event, which contains the user name and password entered by the user.

The content that users can see and the interaction they can feel are supported by views. They will present application feedback in a form that users can understand, and they can also transform simple user interaction into meaningful events. More importantly, views do not directly change the model. They just send events to Operations, and then wait for events sent by the model through listening.

Events

When the user logs in, the view will initiate the "loginAttempt" event. After the login operation is completed, the "currentUser" model will send an event to notify the application that the login status has changed.

Event monitoring enables MOVE (and MVC) to implement inversion of control, allowing the model to update the view. This is a powerful abstraction technique that allows components to be coupled together without interference.

Why now?

Of course, Conrad Irwin does not want to be considered as suggesting that MVC mode is poor. This large-scale application architecture has been very successful in the past decades. However, several decades later, new programming technology has become more and more popular, so you will gradually have some doubts in the use process.

MVC mode is really great, but it was designed for old technology decades ago after all. MOVE mode is an upgrade based on it, so that you can make better use of the existing new tools.

Francesca 2024-06-09 13:21

But the end of closed source must be open source, because many people who are dissatisfied with closed source have created open source, so the end of open source is not necessarily closed source, but to find a business model that is open source= Free Admission

kangert 2024-06-09 20:07

The problem of docker hub is very uncomfortable

Xiaoxia cat ball 2024-06-09 21:29

Very good, come on

zoujiaqing 2024-06-07 21:21

Spring boot was not updated last year

zhuzhua 2024-05-21 10:08

I'm laughing to death. Those who have been deeply kidnapped dare not pay? Who will use the domestic open source framework of small companies in the future will be 213!!! Wait for harvesting later

zhy 2024-05-16 13:16

At the end of Shannon is Nong

Xiao_f 2024-06-07 22:59

One thing to say, compared with other domestic manufacturers, Qwen's relaxed licensing fully demonstrates the style of a large factory

Small and beautiful software development 2024-06-08 23:03

It's mainly about waist training

SnailJob 2024-06-09 09:13

Yes, please continue to follow Snail Job

abeet 2024-06-08 20:38

There are no pictures, for fear that we will learn, right

Xiao Xu Middle aged 2024-06-08 10:12

First place in making money!! Money and treasures will be plentiful

GDWhisperer 2024-05-15 17:23

I transferred tens of thousands of yuan to my own account, which was under risk control. How did I do this? The bank should be responsible for this**

Ding Yun H 2024-06-07 20:44

There is no querydsl. Since querydsl was used, I can't look at other forms anymore

gamedot 2024-05-17 11:14

Old Zhou is deeply concerned about Huawei's great cause of open source. He is not a Huawei person, but has Huawei's soul.

MrChen89 2024-04-29 09:18

There are a group of people like this. I don't know what they have experienced. When it comes to HW, I can't say anything good, even if it's neutral

Xiao Xu Middle aged 2024-06-08 12:43

Do AI functions need networking? Will it be 404?

H Fine water and long flow H 2024-06-10 09:39

I haven't heard about whether fartran has paid. I'm in the top ten

yh2216 2024-06-09 13:15

Like c++

pan3793 2024-06-07 22:26

Let AI give AI a score

-SORA- 2024-04-30 17:07

When this happened in a foreign country, the comment area suddenly became very objective and rational**

Chief taxi captain 2024-05-17 11:17

I suggest that 360 open source all its products, and then become the leading enterprise in the domestic open source industry through open source, leading everyone to compete with foreign enterprises

Qin Liming 2024-05-11 09:12

be devoid of any sense of shame

One code Yma 2024-05-06 09:14

My technical article was moved by CSDN. Why didn't anyone step on the sewing machine? This kind of report is a joke to me. The monsters with background are fine, and the monsters without background fight to death

infoworld 2024-05-11 15:12

Universities should use open source free software instead of commercial ones. In this way, hands and feet will not be tied technically.

Ma Nong Little Fatty Brother 2024-05-16 14:40

I give you six seconds. I give you six moves with the same effect in the martial arts contest, which shows the invincibility and confidence of the master

monkey_cici 2024-05-09 00:25

My I9 CPU, 64GB memory module and 3080Ti computer are inferior to the top configuration of 19999 on a tablet

golyu 2024-06-10 14:45

If only this was the library of solidjs

generation

Code e person 2024-06-09 10:03

Prepare the next project and try it

Francesca 2024-06-10 16:19

Be ignorant. This thing has a long history. It is used for scientific computing and has high performance

kangert 2024-06-09 20:10

Really need to practice

muwanqing123 2024-06-09 08:28

Bullshit authentication

osc_92224065 2024-04-29 10:57

Long term oppressed outsourcing of state-owned enterprises

xiaoqibabby 2024-05-15 17:36

The bank is strongly required to be responsible for

CodeDoger 2024-05-02 20:48

35 It's too old to go to work and too early to retire at 60

Yoona520 2024-05-17 16:34

Zhou Hongyi is now living more and more like a clown. If he stays behind the scenes, he has to become an online celebrity. Can you learn from Lei Jun?

Li Yinghui 2024-05-09 16:40

Buddhism has a good word, evil opinion. In dealing with the world, it is meaningless to draw conclusions from preset positions; It is also important to receive good logic training.

Kevin586 2024-06-08 14:41

Dream is garbage, which can also be listed and refresh my cognition

Ai East 2024-06-10 19:11

Absolutely easy to use

Bright 2024-05-19 23:25

What a fool! I killed myself. How can people deal with me later.

lyh97157268 2024-06-09 20:58

zhangleijie 2024-06-08 10:08

pretty good

osc_27546117 2024-06-09 22:36

Learned electric programming and expected its progress

Yeah, for 2024-05-17 13:42

That's too right. Old Zhou can't control Google, but he can control 360. Do not do to others what you do not want. All 360 products should be opened first.

zzeric 2024-04-28 20:01

Although France is the parent community, the core developers of OCCT on github are all Russians. Without Russians, the French parent community cannot continue to operate. So Huawei took over, moved to China, changed its name and resumed open source and community operations. What's the problem?

Happy LeapFrog 2024-05-18 09:18

But the question is: "What's the use of this for ordinary Android users?" Now the answer seems to be: "Almost nothing.".

brucepapa 2024-06-09 21:02

I also have several backaches... After a few days of exercise, it will be much better to focus on stretching the back muscles.

kakai 2024-05-10 10:21

The world only knows that Android was created by Google. Several people know that Android is only a product acquired by Google. Similarly, what is the problem with Huawei's contribution to the collection of OGG open source work and integration into its own proprietary product line?

One code Yma 2024-05-09 09:58

Recently, I often go to interviews. People who hate Ali background most regard me as a fool, even though I am a fool

Monkeys think of apes 2024-05-31 18:31

You can cheat your brother. Just don't cheat yourself

Xiao Xu Middle aged 2024-06-10 07:05

Learn

Francesca 2024-05-19 18:00

Wine runs the Android emulator of Windows. Chrome OS is installed in the Android emulator. Linux environment is installed in chrome OS. Linux environment is installed in the Linux environment. Wine is installed in the Android emulator

Single structure 2024-05-11 10:09

Selected as Open Source China's disgrace pillar

osc_566335 2024-04-28 14:44

This is also called floor washing? Does it mean that Tesla will not wash the floor if it releases all the source code? Some people HWptds? That is to say, the language is ambiguous, which will also rise to the washing ground? Are some people too focused? Think the people he pays attention to must be staring at?

oldpig 2024-04-28 09:59

”Huawei contributed all the source code "?, the title is completely inconsistent with the content.

sunday12345 2024-05-15 18:31

What does the bank do? It's blamed on the remote desktop. Persimmons really pick up soft pinches~?

iVista 2024-06-10 18:13

I was blinded by the math test

zoujiaqing 2024-06-07 21:22

I dare not use it

Wang Zheng 2024-06-08 09:46

You said, "All the tests are graduate students" and smiled. I don't know my level is low.

yh2216 2024-06-09 23:03

I remember saying that one year C++was the language of the year,

Shuimu Yi'an 2024-05-20 09:58

The news should be read continuously. I'm waiting for the third news besides rustdesk and teamviewer. Localized remote desktop software is far ahead.

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