udemy software architecture

?Software Architecture has ethical consequencesMichael NygardThe ethical diMEnSion in software was obvious when we were talking about civil rights, identity theft, or malicious software . But it arises the less exotic circumstances. IF programs is successful, they affect the lives of thousands or millions of people. Th

Image The image architecture model provides a mechanism to dynamically change the structure and behavior of the software system, which is divided into two main parts: one metalayer and one basic layer. The meta-hierarchy provides a software self-representation to give the software's own structure and behavior knowledge. The meta-hierarchy is composed of so-call

-14, with little meaning.7. Do not pay attention to the details:The preliminary design should not pay attention to details. For example1. Only the object name is identified for each object, and its properties and methods are not recognized.2. "Current Account Pin user interface", which may be a dialog box, Web interface, character terminal interface, but the robust diagram does not care about these details.3. Are entity objects such as "customer data" required to be persisted? Do not care, more

, let's talk about this. Next, I remember that I used to take this course in college: software demand analysis and design. The instructor defined the requirement to know what the user needs! Finally, let's talk about the document's problems. "Software Engineering" emphasizes that there are documents step by step. I personally understand the role of this document: 1. It provides an interface for transpar

1. Warehouse Style In the repository style. There are two different components: the central data structure shows the current state. The independent component is executed on the central data storage. The interaction between the warehouse and the external component is greatly changed in the system. If a process execution is triggered at a certain time in the input stream, the repository is a traditional database. On the other hand, if the current state of the Central Data Structure triggers the pr

Hello everyone:As a software developer, I'm sure everyone has thought about the question: Why is the performance of the native Godson processor so different from Intel's processor performance in the same period? Why is domestic open source software development far less than abroad? ------is our software developer's own lack of literacy? Or is it the hardware perf

1 Common software system architecture b/ S/C1.1　C/SL/C structure is client / server (client/server), such as QQ;L need to write server-side programs, as well as client programs, for example, we installed QQ client program;L Disadvantage: Software updates need to update both client and server side at the same time, more trouble;L Advantages: good security. 1.2　b/

(to be continued) A cursory look at the Yang Guangfu Video tutorial, the software architecture is organized as follows.1. First introduce the side-slip menu, and the main content page.The slide-by menu is registered in the first oncreate of the software. and set parameters, such as slide-slip mode and the number of pixels sliding.2. Write the layout file for the

The three mainstream Web services implementations currently known are:REST: Representational state transitions (software architecture style)SOAP: Simple Object Access ProtocolXML-RPC: Remote Procedure Call protocolBrief Introduction: REST: Characterize state transitions (representational states Transfer), using a standard HTTP method (Get/put/post/delete) for Web services to abstract the services of all WEB

service and adapts to the presentation layer. Here we will talk about macro services and microservices. Macro services have some coarse-grained services. A user's usecase operation, such as an e-commerce order, CreateOrder is a macro service, rather than fine-grained goods inventory check and order legality. The corresponding microservice is sometimes called an Application Service). It is represented by the logic details of the problem domain, such as the fine-grained services such as inventory

more than ten years. However, while the industry is evolving, some of the things that asterisk, such as the basic concept of channels, flexible call handling using dial plans, still support the development of complex telephony systems. there is one area where the asterisk architecture has not been handled too well, that is, how to make the system scalable across multiple servers. The asterisk development community is developing a partner project call

,easy and straightforward to complete...①User StorySelection of design patterns;Domain ModelorTransaction Script. ② User Story in the Entity with the Value Object the design. ③ User Story test case latitude and the design of the test data. A "scene tree"; an extremely simple and lightweight practice that enables developers to integrate requirements analysis, architecture (software) design, development and t

Hierarchy in Software System Architecture About the layered structureAs we all know, the classic three-tier structure includes the data access layer, business logic layer, and presentation layer. Of course, if you continue to expand, it can also be divided into four layers, five layers ...... I believe that many people have used it and many people have written it. But why is it so difficult for some people

MVC to your application, and because of the strict separation of the model and the view, it is also difficult to debug the application. Each component needs to be thoroughly tested before it can be used. Once your components have been tested, you can reuse them without scruple.Based on my personal experience, since we have divided an application into three parts, using MVC also means that you will be managing more files than before, which is obvious. It seems that our workload has increased, bu

according to the configuration file (Struts-config.xml) Delegate the request received by Actionservlet to the appropriate action handler. In the business layer, the spring IOC container that manages the serviced component is responsible for delivering the business model component to the action and the component's collaboration Object data Processing (DAO) component to complete the business logic and to provide container components such as transaction processing, buffer pooling to improve system

is0.125us, so here's probably the execution. theInstructions.While8.12usRelative to1ms, it was extremely short, and only accounted for the8.2%Time, so there's91.8%The free time can be given toCPUTo handle background tasks.--------------------------------------------------------------------------------------------------------------- ----------------------Step two: Message management module------------------------------------------------------------------------------------------------------------