software architecture software

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

the subsequent article in-depth analysis, extraction design structure and design skills of the essence, for the vast number of software industry colleagues to share. 2. Basic knowledge of SCA specification The SCA programming model is highly extensible and language neutral, and it is easy to be extended to various implementations of language technology java,c++,bpel,php, spring, and many other remote access bindings including Web SERVICE,JMS, Ejb,j

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

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

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

We talked about the underlying core OS in the iOS software architecture, and the core service layer of the iOS system, on top of the kernel OS layer, consists of two parts: Core service libraries and advanced features based on core services. This article makes a detailed explanation of these two functions.First, the core services layer contains the following libraries:1. Address Book FrameworkFor Address Bo

Complex software must have a clear and reasonable architecture, otherwise it cannot be developed and maintained.MVC (Model-view-controller) is one of the most common software architectures and is widely used in the industry. It's easy to understand, but it's not easy to tell the difference between the derived MVP and the MVVM

notification mechanism to achieve synchronization.4) Synchronization is flexible, you can synchronize only a subset of the data in the database.5) daemon is implemented in Perl language, and is synchronized by Pl/pgsql and Pl/perlu functions.4, Pl/proxyThe software, features and features of the PG database for horizontal splitting are as follows:1) The application sends the request to the horizontal split middleware, which sends SQL to the underlying

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

Types of software EvolutionSoftware evolution is like biological evolution, some mutations are beneficial to species, and some are harmful.The key to differentiate the type of software evolution is whether the quality of the program is increased or decreased in this process. The second is that this evolution is the result of the process of the construction of the show sea, or the maintenance process of modi

, but these are enough)II. application points (for courses)1. Whether the given string conforms to the filtering logic of the regular expression (i.e. "match");2. Use regular expressions to get the specific part you want from the string.Iii. Some simple examples (expressions)1. Match URL: [a-za-z]+://[^\s]*2.QQ (at least 5 digits, not starting with 0): [1-9][0-9]{4,}3.((HTTP|FTP|HTTPS)://) ([a-za-z0-9\._-]+\.[ a-za-z]{2,6})4. Email:^[a-zA-Z0-9_-][emailprotected][a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$

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

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

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

Module Division Module Partition "Zoned" is the meaning of planning, meaning how reasonable to divide a large software into a series of functional independent part of the cooperation to complete the system needs. C language as a structured programming language, in the division of modules mainly based on functions (according to the function of the division in the object-oriented design to become a mistake, Newton's law encountered relativity), C-langu

-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

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

Single taskProgramTypical Architecture (1) starting from the specified address when the CPU is reset; (2) Jump to assemblyCodeExecute at startup; (3) Jump to the main program of the user owner and execute it in main: A. testing various hardware devices; B. initialize each software module; C. Enter an infinite loop and call the processing functions of each module. The user's main program and