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• Is it better to return NULL or empty values from functions/methods where the return value is not present?

  - by P B

  I am looking for a recommendation here. I am struggling with whether it is better to return NULL or an empty value from a method when the return value is not present or cannot be determined. Take the following two methods as an examples: string ReverseString(string stringToReverse) // takes a string and reverses it. Person FindPerson(int personID) // finds a Person with a matching personID. In ReverseString(), I would say return an empty string because the return type is string, so the caller is expecting that. Also, this way, the caller would not have to check to see if a NULL was returned. In FindPerson(), returning NULL seems like a better fit. Regardless of whether or not NULL or an empty Person Object (new Person()) is returned the caller is going to have to check to see if the Person Object is NULL or empty before doing anything to it (like calling UpdateName()). So why not just return NULL here and then the caller only has to check for NULL. Does anyone else struggle with this? Any help or insight is appreciated.

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• Managing different utility classes between engine and libraries

  - by hayer

  I'm currently in updating some engine code (which does not work, so it is more like creating a engine). I've decided to swap over to SFML (instead of my own crappy renderer, window manager, and audio), Box2D (since I need physics, but have none), and some small utilities I've built myself. The problem is that each of the project mentioned over use different types for things like Vector2, etc. So to the question: is it a good idea to replace Box2D and SFML vectors with my own vector class (which is one of my better implementations)? My idea then was to have a separate .lib with all my classes that should be shared between all the projects in the solution.

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• Resource Managers - Are they any good?

  - by The Communist Duck

  Hey. I've seen many a time in source code, things like this [well, this is more of a pseudo C++ idea of mine] type defshared_ptr ResourcePtr;// for ease ResourcePtr sound1 = resourceManager.Get("boom.ogg"); sound1-Play(); ResourcePtr sprite = resourceManager.Get("sprite.png"); I was just wondering how useful a class like this was, something that: Loaded media files Stored them in memory Did this at the start of a level - loading screen. Cleaned up Rather than having a system of: Resources are held by entities only, or loose. Responsible for own load into memory. The first is a 'manager' as such; something I feel indicates it's wrong to use. However, it allows for something like a vector of resource names to be passed, rather than having to scramble around finding everything that needs to be loaded.

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• How can I refactor my code to use fewer singletons?

  - by fish

  I started a component based, networked game (so far only working on the server). I know why singletons can be bad, but I can't think of another way to implement the same thing. So far I have: A GameState singleton (for managing the global state of the game, i.e. pre-game, running, exiting). A World singleton, which is the root entity for my entity graph An EntityFactory A ComponentFactory I'm thinking about adding a "MessageDispatcher" so individual components can subscribe to network messages. The factories do not have state, so I suppose they aren't so bad. However, the others do have global state, which is asking for trouble. How can I refactor my code so it uses fewer singletons?

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• When designing an application around Model-View-Controller (MVC), what is in your toolbox?

  - by ericgorr

  There are a lot of great explanations for what the Model-View-Controller design pattern is, but I am having trouble finding good resources showing how to use it in practice. So, when you are starting a new application (doesn't matter what it is), what is in your toolbox? For example, it was suggested that using UML collaboration diagrams ( http://www.objectmentor.com/resources/articles/umlCollaborationDiagrams.pdf ) can be useful when designing an application around MVC, although, I am not certain exactly how or why this might be the case...? So, what is in your toolbox for MVC?

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• Modern website/webapp setup

  - by onepiece

  I'm new to web development. From looking at popular open-source frameworks for both front-end and back-end, I have a general idea of what the modern full-stack web setup looks like: Database <- Back-end language ~ REST API <- Front-end Notes: The back-end language (Python, Ruby, PHP, Java) generates the API, which is the only layer between the back and the front. The API will have authentication to protect private data. The front-end sends GET and POST requests to the API. A MVC framework can be used, such as Backbone, Angular, or Ember.js. Does this align with best practices for web development?

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• Should Business Interfaces be part of the Model layer?

  - by Mik378

  In an oriented-services enterprise application, isn't it an antipattern to mix Service APIs (containing interface that external users depends on) with Model objects (entities, custom exceptions objects etc...) ? According to me, Services should only depends on Model layer but never mixed with it. In fact, my colleague told me that it doesn't make sense to separate it since client need both. (model and service interfaces) But I notice that everytime a client asks for some changes, like adding a new method in some interface (means a new service), Model layer has to be also delivered... Thus, client who has not interested by this "addition" is constrained to be concerned by this update of Model... and in a large enterprise application, this kind of delivery is known to be very risked... What is the best practice ? Separate services(only interfaces so) and model objects or mix it ?

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• Where to generate data in an Entity-Component System?

  - by Mark Mandel

  So I'm making a small game where I generate 2D landscape using perlin noise when the game first loads. I've got it working in a OO way, but want to move over to an ES architecure, and I'm just struggling to work out the right place for the code that does the generation to go? In OO world, I have a World object which gets passes a coordinate value that is used as the seed for the perlin noise, and generates all the points for the land mass when the world is created. I'm thinking I need a World component with a coordinate field on it - that's an easy part. From there - is it right for a component to generate data when it's first initialised (or is that too OO?)? Or should a System be doing that instead, when the game first starts? Or... some other solution I'm not aware of? Thanks in advance for any guidance.

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• Plagued by multithreaded bugs

  - by koncurrency

  On my new team that I manage, the majority of our code is platform, TCP socket, and http networking code. All C++. Most of it originated from other developers that have left the team. The current developers on the team are very smart, but mostly junior in terms of experience. Our biggest problem: multi-threaded concurrency bugs. Most of our class libraries are written to be asynchronous by use of some thread pool classes. Methods on the class libraries often enqueue long running taks onto the thread pool from one thread and then the callback methods of that class get invoked on a different thread. As a result, we have a lot of edge case bugs involving incorrect threading assumptions. This results in subtle bugs that go beyond just having critical sections and locks to guard against concurrency issues. What makes these problems even harder is that the attempts to fix are often incorrect. Some mistakes I've observed the team attempting (or within the legacy code itself) includes something like the following: Common mistake #1 - Fixing concurrency issue by just put a lock around the shared data, but forgetting about what happens when methods don't get called in an expected order. Here's a very simple example: void Foo::OnHttpRequestComplete(statuscode status) { m_pBar->DoSomethingImportant(status); } void Foo::Shutdown() { m_pBar->Cleanup(); delete m_pBar; m_pBar=nullptr; } So now we have a bug in which Shutdown could get called while OnHttpNetworkRequestComplete is occuring on. A tester finds the bug, captures the crash dump, and assigns the bug to a developer. He in turn fixes the bug like this. void Foo::OnHttpRequestComplete(statuscode status) { AutoLock lock(m_cs); m_pBar->DoSomethingImportant(status); } void Foo::Shutdown() { AutoLock lock(m_cs); m_pBar->Cleanup(); delete m_pBar; m_pBar=nullptr; } The above fix looks good until you realize there's an even more subtle edge case. What happens if Shutdown gets called before OnHttpRequestComplete gets called back? The real world examples my team has are even more complex, and the edge cases are even harder to spot during the code review process. Common Mistake #2 - fixing deadlock issues by blindly exiting the lock, wait for the other thread to finish, then re-enter the lock - but without handling the case that the object just got updated by the other thread! Common Mistake #3 - Even though the objects are reference counted, the shutdown sequence "releases" it's pointer. But forgets to wait for the thread that is still running to release it's instance. As such, components are shutdown cleanly, then spurious or late callbacks are invoked on an object in an state not expecting any more calls. There are other edge cases, but the bottom line is this: Multithreaded programming is just plain hard, even for smart people. As I catch these mistakes, I spend time discussing the errors with each developer on developing a more appropriate fix. But I suspect they are often confused on how to solve each issue because of the enormous amount of legacy code that the "right" fix will involve touching. We're going to be shipping soon, and I'm sure the patches we're applying will hold for the upcoming release. Afterwards, we're going to have some time to improve the code base and refactor where needed. We won't have time to just re-write everything. And the majority of the code isn't all that bad. But I'm looking to refactor code such that threading issues can be avoided altogether. One approach I am considering is this. For each significant platform feature, have a dedicated single thread where all events and network callbacks get marshalled onto. Similar to COM apartment threading in Windows with use of a message loop. Long blocking operations could still get dispatched to a work pool thread, but the completion callback is invoked on on the component's thread. Components could possibly even share the same thread. Then all the class libraries running inside the thread can be written under the assumption of a single threaded world. Before I go down that path, I am also very interested if there are other standard techniques or design patterns for dealing with multithreaded issues. And I have to emphasize - something beyond a book that describes the basics of mutexes and semaphores. What do you think? I am also interested in any other approaches to take towards a refactoring process. Including any of the following: Literature or papers on design patterns around threads. Something beyond an introduction to mutexes and semaphores. We don't need massive parallelism either, just ways to design an object model so as to handle asynchronous events from other threads correctly. Ways to diagram the threading of various components, so that it will be easy to study and evolve solutions for. (That is, a UML equivalent for discussing threads across objects and classes) Educating your development team on the issues with multithreaded code. What would you do?

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• How can I justify a technology over another? (Java over .NET)

  - by user674887

  We are working in a Java/.NET company and my team and I are planning a project for a client. One of the requirements is that the project has to be done in .NET I've asked about this requirement, and the client said that it doesn't matter, and that if I have a good reason we can use other technology. But, I have to justify the decision. As a Project Manager / Analyst I'm interested in making the project in Java because: The team knows java much better, regarding the language and frameworks I don't know anything about .NET technology (and maybe we could make bad decisions thinking in a Java way to do things) There are other people in company that have more skills in .NET but they have other projects with more priority. For experience, I'm sure that if we use Java, the project will have much more quality. But this arguments could be weak from the client perspective. How can I justify making the project in Java? EDIT: I'm not asking if one technology is better than other. "It's not a technology war" question.

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• What should a system architect know? [closed]

  - by marko

  What does the title System Architect really mean? What do you need to know to be a system architect. Do you need to know design patterns or something like that? At work we have a couple so called "System Architects". They do the same stuff as we developers, but the distinction are that they are older and thus has more experience and knowledge of the business domain we work in. But I'm not really seeing the architecting side of work really...

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• IXRepository and test problems

  - by Ridermansb

  Recently had a doubt about how and where to test repository methods. Let the following situation: I have an interface IRepository like this: public interface IRepository<T> where T: class, IEntity { IQueryable<T> Query(Expression<Func<T, bool>> expression); // ... Omitted } And a generic implementation of IRepository public class Repository<T> : IRepository<T> where T : class, IEntity { public IQueryable<T> Query(Expression<Func<T, bool>> expression) { return All().Where(expression).AsQueryable(); } } This is an implementation base that can be used by any repository. It contains the basic implementation of my ORM. Some repositories have specific filters, in which case we will IEmployeeRepository with a specific filter: public interface IEmployeeRepository : IRepository<Employee> { IQueryable<Employee> GetInactiveEmployees(); } And the implementation of IEmployeeRepository: public class EmployeeRepository : Repository<Employee>, IEmployeeRepository // TODO: I have a dependency with ORM at this point in Repository<Employee>. How to solve? How to test the GetInactiveEmployees method { public IQueryable<Employee> GetInactiveEmployees() { return Query(p => p.Status != StatusEmployeeEnum.Active || p.StartDate < DateTime.Now); } } Questions Is right to inherit Repository<Employee>? The goal is to reuse code once all implementing IRepository already been made. If EmployeeRepository inherit only IEmployeeRepository, I have to literally copy and paste the code of Repository<T>. In our example, in EmployeeRepository : Repository<Employee> our Repository lies in our ORM layer. We have a dependency here with our ORM impossible to perform some unit test. How to create a unit test to ensure that the filter GetInactiveEmployees return all Employees in which the Status != Active and StartDate < DateTime.Now. I can not create a Fake/Mock of IEmployeeRepository because I would be testing? Need to test the actual implementation of GetInactiveEmployees. The complete code can be found on Github

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• knowing all available entity types

  - by plofplof

  I'm making a game where at some point the game will create enemies of random types. Each type of enemy available is defined on its own class derived from an enemy superclass. To do this, obviously the different types of enemies should be known. This is what I have thought of: Just make a list manually. Very simple to do, but I don't like it because I'll be adding more enemy types over time, so any time I add a new class I have to remember to update this (same if I remove an enemy). I would like some kind of auto-updating list. A completely component based system. There are no different classes for each enemy, but definitions of enemies in some file where all enemy types can be found. I really don't need that level of complexity for my game. I'm still using a component based model to some degree, but each Enemy type gets defined on its own class. Java Annotation processing. Give each enemy subclass an annotation like @EnemyType("whatever"), then code an annotation processor that writes in a file all available enemy types. Any time a new class is added the file gets updated after compilation.This gives me a feeling of failure even if its a good solution, it's very dependant on Java, so it means I cant think of a general design good for any kind of language. Also I think that this would be too much work for something so simple. I would like to see comments on these ideas and other possible solutions Thanks

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• Do I need a Point and a Vector object? Or just using a Vector object to represent a Point is ok?

  - by JCM

  Structuring the components of an engine that I am developing along with a friend (learning purposes), I came to this doubt. Initially we had a Point constructor, like the following: var Point = function( x, y ) { this.x = x; this.y = y; }; But them we started to add some Vector math to it, and them decided to rename it to Vector2d. But now, some methods are a bit confusing (at least in my opinion), such as the following, which is used to make a line: //before the renaming of Point to Vector2, the parameters were startingPoint and endingPoint Geometry.Line = function( startingVector, endingVector ) { //... }; I should make a specific constructor for the Point object, or there are no problems in defining a point as a vector? I know a vector have magnitude and direction, but I see so many people using a vector to just represent the position of an object.

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• Driver inversion

  - by Val

  I have a GUI game, which is driven by user every time it clicks the mouse. Every time user clicks a square on a board, the board state is updated (we re-compute the score, the player to make next move and legal movements it can make) and repainted. Both mouse click, state recomputation and painting are handled in the GUI thread. Now, suppose that I want to train AI to play without GUI. That is, game engine should consume next move by simply calling AI's makeMove function in one thread. This would allow to play millions of games per second automatically. GUI may just screenshot some arbitrary states time after time. How do you switch to this strategy?

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• ASP.Net MVC 3: multiple versions of the site without changing of URL, is it possible?

  - by Seacat

  Our website is written in ASP.NET MVC 3 and we want to change a feature in the core functionality of the site. The problem is not every client can be moved to this new version/format (because of some technical inner restrictions) so it means that we need to keep 2 versions of the same functionality (backend and frontend) simultaneously. We don't want our clients to worry about URLs, so the ideal solution would be keep the same URL but redirect clients to the different versions. The information about clients is stored in database. So the moment when user (client) logs in we know which version of site we should show. I'm thinking about routing and areas but I'm not sure if it's possible for example to have 2 areas with the different versions of the same application. Or is it possible to load the assemblies on the fly? After user is logged in we can decide if (s)he should be redirected to the new or old version. As far as all the clients have been moved to the new version we don't need this system more. How can I do this in ASP.NET MVC?

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• Whar parts of functionality should be refactored into a directive? [AngularJS]

  - by Sprottenwels

  I am creating an application from legacy code using AngularJS. I wonder what parts of my code should be moved into a directive. For example, i had thought of moving a table which is used multiple times across the application into a directive. The tables alter from headings and size. Is it worth the effort or even a good practice to turn such things into their own directives or should i create each table in a unique way?

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• How is this paradigm/style called?

  - by McMannus

  I have the following situation: I'm developing an add-in for a UML modeling tool. The models that can be created by the user are stored inside the main application and a limited access to the models is given through its API. However, the add-in has a lot of callbacks for events that are triggered by the main application, when changes to the model occur by the user. Since the models are already stored once in the main application, I considered it not practicable to duplicate the models in the add-in, which leads to the fact that I have only behavior in the add-in, rather than having a state. This behavior is mainly expressed by static functions, that are organized in functional cohesive classes. The callbacks for the events have always references to the model elements relevant for the specifc event that ocurred. First, it seemed to me that this is a procedural style in general, but procedural style doesn't consider events/callbacks, so this boils down to the question. How is this programming style called?

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• Entity System and rendering

  - by hayer

  Okey, what I know so far; The entity contains a component(data-storage) which holds information like; - Texture/sprite - Shader - etc And then I have a renderer system which draws all this. But what I don't understand is how the renderer should be designed. Should I have one component for each "visual type". One component without shader, one with shader, etc? Just need some input on whats the "correct way" to do this. Tips and pitfalls to watch out for.

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• Designing a hierarchical structure with lots of reads and writes?

  - by JD01

  I am in the process of working on a video on demand system part of it involves the management of a hierarchical tree structure (think windows explorer) which allows users to upload videos, move folders around, create new folders etc. User action will be allowed depending on which permissions they have. In addition to managing the structure (creating folders and uploading videos), subscribers will be viewing content (read access). The number of reads will be significantly more than the writes. My question (and it is big one) is should I store the data in a database (for the writes) and also have some sort of cache which will be used for the reads? or do I use two databases? or is there a better solution? Also I will have to resolve concurrency issues which I think optimistic locking on the database will resolve. I have a fair bit about CQRS over the last few months but not sure if this is the way to go. Any ideas?

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• C# calendar needs Business Logic for real-time reminders? [on hold]

  - by lazfish

  I am not a super experienced C# user, though I have some experience in .Net and VB.Net. Just got this new job and my first assignment is a mission critical part of the business. It is pretty important I get it right so I was hoping for some sage advice. We have created a calendar using jQuery, C#, .Net & SQL Server 08. The calendar works but now we are wanting to add email, SMS and voice-call reminders. We are a small company and can do whatever we need to do with no restrictions on our IT environment. I have some base-line experience with Unix servers but would prefer to stay in the Micro$oft universe if it is prudent to do so. I know how to add the API calls and services to initiate these reminders (using built in email services for email and Twilio.com for SMS). I am asking for advice about how to approach a reliable and timely listener service that knows when to call the service or API for the reminder before an appointment. EG. SMS: "You have a conference call in 30 minutes." I have done some research, but it is hard to know what is a proven reliable approach. What I am looking for is an experienced opinion on a good (or the best) strategy for implementing a solution that will reliably listen for appointments and dispatch the reminders when needed.

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• ??Oracle EBS R12 on Sun database Machine MAA&HPA ????

  - by longchun.zhu

  ??????1????,3??hands-on ?????, ?????????XXX,XXX Partners ??OSS,SC,??iTech ?20????,,??????????,?????????????!??????,????????????????????????! ??,??????,???????,???????,??EBS ???????,??,????ORACLE ?N?????????????,????????????? 5? ?????????, ?????????,????????2T??..??????????PPT ?????????!???eric.gao ??????????? ?????????, ????eric,cindy,??????????! ?????????! ?????,???????????,????,????????... Course Objectives ??: After completing this course, you can be able to do the following : •Understand EBS R12 on Exadata MAA •Install and Configure Oracle EBS R12 Single Instance •Apply Chinese Package on EBS R12 •Upgrade Application DB Version to 11gR2 •Deploy Clone EBS R12 to Sun Database Machine •Migration File System to Exadata Storage ASM •Converting Application DB to RAC •Configure EBS R12 MAA with Exadata 1: Oracle EBS R12.1.1 Single Instance Install 2: Apply Chinese Package on EBS R12 3: Upgrade Application DB Version to 11gR2 4: Clone EBS R12 to Sun Database Machine 5: Migrate File Systems to ASM Storage 6: Converting Application DB to RAC 7: Configure EBS MAA with Exadata

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• ??EBS,Siebel,PS,JDE????????Exadata,Golden-gate,Reri,DBV,AV,RAC,IDM ??N???.

  - by longchun.zhu

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• «Oracle E-Business Suite: ERP DBA????»??

  - by user10821858

  ????????,???????4????,????????????????????,?????????«Oracle E-Business Suite:ERP DBA????»????????????????????????,??????????????“??”,????????????,???????????,???????????????????,????,????,?????????????????????????,???????????????,????????????????????,??????????,????????????????????????:1.????????????????????2.??DBA???ERP??,??????????3.???????????,?????????????????????ERP??????4.?????????ERP????????5.??????????????ERP????????????6.??ERP???????????????????7.????CIO???ERP???????????8.????????????????????????? ?:?????????????:http://vdisk.weibo.com/s/6X-ze ?:?????:http://product.dangdang.com/product.aspx?product_id=22788613 ?:?????:http://book.360buy.com/11021724.html ?:?????:http://product.china-pub.com/3661378 ?:?????:http://www.amazon.cn/dp/B008BFNAX0 ?:?????:http://detail.tmall.com/item.htm?id=18024644999 ????,?????????????????????????! ? ? ???? ERP ????????????20 ?,?Oracle ??????(E-Business Suite)? ????????ERP ????,????????????????,???????? ????????,????????????? ??ERP ???,?????????????ERP DBA ????????ERP DBA ???????DBA ????????????:ERP DBA ??????????,?? ???ERP ????????,????????????????????????? ?,???????????????????,ERP DBA ????????????? ??????,?Oracle ???????????ERP ??,?????????,?? ???????????,?????????ERP DBA ??????,??????? ????ERP ?????,???????????????? ???????????ERP DBA ?????,?????????????ERP ? ???,???ERP ??????????,????????????????ERP ? ?????????,??????????ERP ????,?????:“?????? ??,????????”,???“????”????????????????,? ??ERP DBA ?????,?????????????,????????????? ???“????”??,?“??????”???,??????????????, ??????,???????????????????“????,??????”, ???????????,??????????????,???????????? ????????,????????????ERP ????,????ERP ???? ????? ?????? ????7 ?,???????3 ?:?????????????? ???(?1 ~ 2 ?):??????Oracle ????????????????? ???????,??????????ERP ???????????????,??? ???? ???(?3 ~ 6 ?):?3 ????Oracle ERP ?????????????;?4 ????Oracle ERP ???????ERP ????;?5 ??????Oracle ????? ??????????????;?6 ?????????????????ERP ???? ??? ?????(?7 ?):????????Oracle ERP ??????????,??? ??????????????????????,???????????????? ?,????????????????????????????????????? ???? ????????????: (1)????,?????????????????????????????? ?,???????????????????,?????????????????? ??????,??????????????????????? (2)???,???,??????,??????????????????Oracle ERP ???????????,????;????????????Oracle ERP ??? ??????????,????? (3)????????,???????????????????????,?? ?????????,???????????????????????????;?? ERP DBA ????????????,????????????????????,? ???????????,????????,???????????? ??????? (1)Oracle ERP ??????????????????ERP ???????? (2)???ERP ?????????DBA ????IT ????? (3)??????????????????? ??????? ?????????????,??????????????,????????? ???????????????????????????????,???????? ??????: E-Mail:longchun.zhu-AT-gmail-DOT-com ?? “?????,?????”,???????????????“?????”??? ?????????????,???????????????????????? ?????????????????,??Mike?Charles???????????, ????????????????????,??????????????????? ??????? ? ? ? ? ?1 ? Oracle ??????/1 1.1 Oracle ?????????????/2 1.2 Oracle ??????R12 /3 1.2.1 R12 ???????/3 1.2.2 R12 ???/4 1.3 ????/5 ?2 ? ERP ????/6 2.1 ERP ??????/7 2.1.1 ERP ??????????/7 2.1.2 ERP ?????????/8 2.1.3 ERP ??????/8 2.2 ??????/9 2.2.1 ????????/9 2.2.2 ???????/11 2.2.3 ?????????/12 2.3 ??ERP ?????????/14 2.3.1 ????/14 2.3.2 ??????/15 2.3.3 ????/16 2.3.4 ?????/19 2.3.5 ????/19 2.3.6 ??????/23 2.3.7 ???????/25 2.3.8 ????/26 2.3.9 ???????/27 2.4 ????/28 2.5 ????/29 ?3 ? Oracle ERP ??/31 3.1 ?????/32 3.1.1 ?????? /32 3.1.2 ????/34 3.1.3 ????/35 3.1.4 ????/37 3.1.5 ?????/37 3.1.6 ??Bug ??/39 3.1.7 ????/40 3.2 Oracle ??????R12 ???/42 3.2.1 ????/42 3.2.2 ???????/43 3.2.3 ????/43 3.2.4 ??????/60 3.3 ??????????????/62 3.3.1 ???????/62 3.3.2 ??DNS ???/63 3.3.3 ????Oracle ??????/63 3.3.4 ?????/64 3.4 ????/66 ?4 ? ??????ERP ????/67 4.1 ???????/68 4.2 ??????/81 4.3 ??????/83 4.4 ??????/85 4.4.1 ??????????/86 4.4.2 ????????????/86 4.4.3 ??????ERP ????/87 4.5 ???????????/89 4.6 ?????/89 4.6.1 ???????/90 4.6.2 ???????/92 4.6.3 ??redo ??/95 4.6.4 ??????/96 4.7 ????/98 4.7.1 ???????/98 4.7.2 ?????/99 4.7.3 ???????/100 4.7.4 ??????/100 4.7.5 ?????/101 4.8 ????????? /101 4.8.1 ????/102 4.8.2 ??DNS ???/102 4.8.3 ??sendmail /103 4.8.4 ??IMAP ??? /104 4.8.5 ??Oracle Alert /104 4.8.6 ??Workflow Mail /110 4.8.7 ???????/115 4.9 ?? Forms Socket ??/121 4.10 ????????/123 4.11 ?????????? /124 4.11.1 ???????/124 4.11.2 ???????/125 4.12 ???? /127 ?5 ? Oracle ???????????/128 5.1 Oracle ????????/129 5.1.1 ???/129 5.1.2 ???/130 5.1.3 ????/131 5.1.4 ????/131 5.2 ????????/131 5.2.1 Oracle ?????????????/131 5.2.2 Oracle ??????????/133 5.3 ??????/134 5.3.1 ???????????????/135 5.3.2 AutoPatch/136 5.3.3 AutoConfig/138 5.4 Rapid Clone/141 5.4.1 ????????????/141 5.4.2 ?????/142 5.4.3 ??????/145 5.4.4 ?Clone ?? /146 5.4.5 ??????????/146 5.4.6 Clone ??/148 5.4.7 Clone ??????? /150 5.4.8 ??Clone/157 5.5 OAM ??/158 5.5.1 OAM ?????/158 5.5.2 OAM ????????/158 5.5.3 ????????/159 5.5.4 ????????????/159 5.5.5 ????????/164 5.5.6 OAM ??????/168 5.6 ????/171 ?6 ? ???????/172 6.1 ??Oracle ??????/173 6.1.1 ??Form ?HTML ??/173 6.1.2 ????????/182 6.1.3 ????/187 6.2 ????/192 6.2.1 ?????/193 6.2.2 ????? /193 6.2.3 ?????/194 6.3 ???????/195 6.4 ?????/205 6.4.1 “??”?????/205 6.4.2 ???????/206 6.4.3 ??? /207 6.4.4 ??????? /208 6.4.5 ????????? /208 6.4.6 ??????/209 6.4.7 ???????/218 6.4.8 ??????/225 6.5 ??????/237 6.5.1 ??????/237 6.5.2 ??????/239 6.6 ????/245 ?7 ? ERP ???????/246 7.1 ERP ??????/247 7.2 ERP ???????/247 7.2.1 ????????/248 7.2.2 ?????????/248 7.2.3 ?????????/249 7.2.4 ???????/249 7.3 ????????/249 7.3.1 ERP ???????/249 7.3.2 ????/251 7.3.3 ????/251 7.3.4 ????/253 7.3.5 ????/255 7.4 ERP ??????/255 7.4.1 ????????/255 7.4.2 ???????/256 7.4.3 ?????????/257 7.5 ?????ERP ??/260 7.5.1 ????????/260 7.5.2 ????/261 7.5.3 ??????/262 7.5.4 ????????/273 7.6 ERP ????/280 7.6.1 ??X-Windows/280 7.6.2 ???????/281 7.6.3 ?????????/281 7.6.4 ??redo ??/282 7.6.5 ??opmn.xml ??/283 7.6.6 ???????/283 7.6.7 ??Apache ??/285 7.6.8 Forms Server socket ????/285 7.6.9 ??Forms Dead Client ??/286 7.6.10 ??Cancel Query /287 7.6.11 ??????????/288 7.6.12 ????????/293 7.6.13 ?? GSM ??/294 7.6.14 ??“ICX:????”/297 7.6.15 ????????/298 7.6.16 ???????/302 7.7 ??????/305 7.7.1 ?????/305 7.7.2 ????/305 7.7.3 ?????/305 7.7.4 ???????/306 7.7.5 ??????/306 7.8 ????????/306 7.8.1 ???CSI Number /307 7.8.2 ???SR /307 7.8.3 TAR ??/307 7.8.4 ????/307 7.9 ????/308

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• jQuery plugin for Event Driven Architecture?

  - by leeand00

  Are there any Event Driven Architecture jQuery plugins? Step 1: Subscribing The subscribers subscribe to the event handler in the middle, and pass in a callback method, as well as the name of the event they are listening for... i.e. The two green subscribers will be listening for p0 events. And the blue subscriber will be listening for p1 events. Step 2: The p0 event is fired by another component to the Event Handler A p0 event is fired to the Event Handler The event handler notifies it's subscribers of the event, calling the callback methods they specified when they subscribed in Step 1: Subscribing. Note that the blue subscriber is not notified because it was not listening for p0 events. Step 3: The p1 event is fired a component to the Event Handler The p1 event is fired by another component Just as before except that now the blue subscriber receives the event through its callback and the other two green subscribers do not receive the event. Images by leeand00, on Flickr I can't seem to find one, but my guess is that they just call it something else in Javascript/jquery Also is there a name for this pattern? Because it isn't just a basic publisher/subscriber, it has to be called something else I would think.

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