architecture

问题 I'm possibly writing a plugin system for a Cocoa application (Mac, not iPhone). A common approach is the make each plugin a bundle, then inject the bundle into the main application. I'm concerned with the security implications of doing this, as the bundle will have complete access to the Objective-C runtime. I am especially concerned with a plugin having access to the code that handles registration and serial keys. Another plugin system we are considering is based on distributed notifications

问题 I am and android developer and I have worked on all of these three architecture patterns in my applications. Also I have gone through several post's on stackoverflow about the difference of each. My understanding might not be 100% correct but this is what I know so far in brief. MVC - User input is received by controller. Controller updates the model then tells the view to update itself. MVP - View gets the user input and notify the Presenter. Presenter gets the data from Model and then sends

问题 My situation ... I have a set of workers that are scheduled to run periodically, each at different intervals, and would like to find a good implementation to manage their execution. Example: Let's say I have a worker that goes to the store and buys me milk once a week. I would like to store this job and it's configuration in a mysql table. But, it seems like a really bad idea to poll the table (every second?) and see which jobs are ready to be put into the execution pipeline. All of my

问题 I'm developing a Java REST API that uses client data from a postgreSQL database. The numbers: . About 600 clients at the beginning . Some of them doing requests every few seconds Because clients pay per request, we need to control if their number of successful requests reach their limit, and as querying postgresql data (update the value of 'hitsCounter' field) after every request is bad in terms of performance, we are thinking about implementing a cache system with redis. The idea: After a

问题 Currently my employer deploys a web application over 3 servers. DB - No public route Web Service DAL - No public route Web Server - Public route The reason for this is the theory that if the web server is compromised, they don't arrive at the DB directly, but instead arrive at the DAL box. To my mind, as the DAL box and Web Sever box - both run windows/IIS - if the public box has been compromised, the same exploit would likely work on the DAL box - therefore I do not see this as a real

问题 I have been searching for this online, but I can't seem to find something that is clear enough for me to understand. I have seen "similiar" questions on here about this in Java. class animal{ private $name; // traditional setters and getters public function setName($name){ $this->name = $name; } public function getName(){ return $this->name; } // animal constructors function __construct(){ // some code here } // vs function __construct($name){ $this->name = $name; echo $this->name; } } $dog =

问题 I saw a code example that creates a method Window_Loaded() which is called by XAML's "Window Loaded" event: <Window x:Class="TestModuleLoader.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300" Loaded="Window_Loaded"> <Grid> ... </Grid> </Window> But in the code behind, the code worked in both the constructor and the Window_Loaded() method: using System.Windows; namespace

问题 I have a simply Class that is intended to be a simple POCO - it just holds data. With one exception: It contains a Collection of Notes. I want to lazy-load this collection so that I don't have to fetch the Notes on Pages that don't need them. The stub for this is this: public class MyDTOClass { private ICollection<Note> _notes = null; public ICollection<Note> Notes { get { if(_notes == null) { // Get an INoteRepository and initialize the collection } return _notes; } } } Now, I'm wondering

问题 I'm just reading up on SOA and the service registry / UDDI get mentioned regularly. It sounds nice but how is used in reality? Is the registry meant to decouple a logical service from its' physical implementation (port, url etc)? Is the registry meant to be browsed by a human looking for an interesting service to play with? Would it be 'wrong' to hard-wire an application to the services it uses? 回答1: I find it to be more theoretically useful than practically useful. It is infrequently

问题 I built my project on a real iOS device and it was working fine but when I tried to run it on the simulator it gives me the below architecture error. Also, I have faced the same issue earlier and that time App was working fine for simulator and gave me the same error for the real device. Non-fat binary /Users/dhavalkansara/Library/Developer/Xcode/DerivedData/Runner-dwtuugielmxutoatpwezjbbcemuy/Build/Products/Debug-iphonesimulator/Runner.app/Frameworks/App.framework/App is not x86_64. Running