good architecture software

Concurrency Mode Two models designed to share resources among multiple threads or processes: · The Active Object design mode separates method execution from method calls. The purpose is to enhance concurrency and simplify synchronous access to objects residing in the control thread. · The monitor Object Design Pattern synchronizes the execution of Concurrent methods to ensure that there is only one method running within the object at the same time. It also allows the execution sequence of

Layer 3: Business, IT implementation, and Interaction The future software should be a service provider in the traditional industry, and the future software should be highly interactive. Therefore, based on these two aspirations, we have come up with a three-layer architecture of future software. Or three major pieces

?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

Abstract: Software philosophy, software path, silver bullet, Wolf, software architecture, see: top ten proposition programming rules for eliminating wolf in sequence Sage said: Gu Shen does not die is called Xuan. The door to xuanjicang is the root of Heaven and Earth. It is useless if it is stored. The key to ap

-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

located and execute the Python ez_setup.py on the command line The scripts directory will be generated in the Python installation directory, with Easy_install.exe Add the script directory to the environment variable path. 2. Installing the SQLAlchemy module CMD command line, Run command: Easy_install sqlalchemy Specific code shows: For more tutorials, you are welcome to focus on today's headlines-making full-stack siege lions. Talk about learning together.

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

release it explicitly when exiting the critical section. 2) inflexible and inefficient. Depending on the context in which the application is running, different lock types are required for implementing the critical section. However, if the lock primitive is hard-coded to the software in every place in use, it is completely unnecessary and time-consuming to change the primitive. These modes can alleviate the above problems to simplify serialization

There are no software development companies that do not use a three-tier architecture or higher-level architecture. For example, if your project team has three people. If a layer-3 structure is used, the job can be split into one person as the UI Layer, one person as the data access layer, and one person as the business logic layer. Everyone is responsible for

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

http://blog.csdn.net/horkychen/article/details/46612899From the point of view of architecture design (so-called composition theory), software systems are modules and interfaces.The module (Hierarchy/component) determines the division of labor, and the interface determines interaction.An API is the definition of an interface. The modules do not need to be concerned with the implementation of other modules, o

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