software architecture software

Two aspectsSystem performance can be extendedAlgorithmScale up-compute intensive applications, using Multithread;io dense applications, async IO (reactive,for example,js node,c++ Ace,java netty Mina)Scale Out-share no status,share little status (example Hadoop, inverse Oracle RAC), Distributed ADT ((probability) monoid etc.)Hybrid-cache (tradeoff with scale out), batchSystem functions can be extendedSOURCE level-Design pattern, oo (prefer composition to inheritance), function combinatorSystem le

selenium and testngFirst, download and install the Selenium ide,selenium rc,selenium grid installation package separately from the Selenium official website. Download and install the testng installation file from the TESTNG official website.Software testing activities are conducted around test cases, and for Web automation testing, the basic steps are as follows: Write test cases, record test scripts, configure test engineering, run test scripts, and view test reports.For the development and ex

pointer array fops is registered in the system's API management array.6. The system is classified management of the drive, it has a record of each driver interface function pointer array Base address array, each driver in advance in order to contract, such as the first element of the group is the key driver Key_fops, and the second is the LCD driver lcd_fops, and so on. When a driver is loaded, the driver logs the corresponding FoPs through the API-managed interface to the corresponding locatio

along each pipeline 3, decide how to implement each pipeline connection 4, design and implement filter 5, design error handling 6, set up a processing lineResolved example--TCP/IP protocol known to use: Unix pipelining tasks: Program compilation, document creation effect-advantages: Not necessarily intermediate files, filter exchange/reorganization flexibility, reuse, rapid prototyping, parallel processing inefficient: Sharing state information expensive/inflexible, parallel processing efficien

Practice of one-time invoicing Software Architecture (I) -- Overview 1. Structure Based on experience, we can find that an interface is always one piece. Each piece contains some basic controls (such as buttons, text boxes, and date controls), as well as a grid control and tree control, if each block is called a region, it becomes an item. In this way, we can abstract the interface into two base classes

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

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------------------------------------------------------------------------------------------------------------

PerformanceFor users, programmers are delivering software, providing a refreshing user interface, and avoiding system crashes is often more important than the performance of the program.There is a loose relationship between performance and code speed. This kind of work is a bit forgotten how if you're just focusing on how fast your code is running. In particular, be careful about giving up other functional areas to make your code run faster. If the sp

++) { (*iter). _uninit (); } } /** * Add module * * @Param mod * Module*/ voidaddmodule (selfmodule MoD) {_list.push_back (mod); } /** * Find module * * @Param ID * ID of the module to be found * @Return return the found module */SelfmoduleFindmodule (stdstring ID); /** * null reference for module*/ StaticSelfmodule _nullmodule; protected: /** * Module list*/Vector_list; protected: Selfmodulelist (vo

Architecture of object-oriented software requirements Here, we need a specific way of thinking and a unique methodology. It is necessary to correctly understand and properly use the classical demand analysis theory.1. establish a system's overall framework as soon as possible in terms of ideological methods, and generally locate the positions of various specific targets in the system framework and their rol

name. After successful matching, the offset of the file in SD is obtained. The 9-bit offset (512 bytes, one sector) is the position of the file. Fopen returns a handle that corresponds to a data structure. The structure generally includes the start position, length, and current read pointer position of the file. The record start position and length are used to prevent cross-border reading. 6. fread The read operation is performed based on the current read pointer of the handle, and the cu

/projects/structuremap/files/Ninject:http://ninject.org/downloadUsing the existing broad application framework above, spring.net originates from Java's Spring, is more complete and powerful, AUTOFAC and Ninject are more clear and friendly, personal recommendation use autofac+ other framework combination.4, interface Isolation principleRequirements: Use a dedicated small interface as much as possible, rather than the total interface, to avoid complex interfaces.5, the Richter replacement principl

be analyzed according to the engineering data provided by the customer, the processing process is made and the average price of each process is calculated. Installation Environment Implementation steps Stage On-line module Implementation cycle 1 Engineering Sales Procurement Warehouse Around 2 Material Control Workshop Control production plan Eight weeks 3 Payables Accounts receivable Ledg

class, where each terminator in the expression produces a Varexpression object in the stack.Nonterminalexpression Non-Terminator expressionEach rule in the grammar corresponds to a non-terminating expression, and our example is that the addition and subtraction rules correspond to the two classes of addexpression and subexpression respectively. The non-terminator expression increases according to the complexity of the logic, in principle each grammar rule corresponds to a non-terminator express