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• Carpool logical architecture

  - by enrmarc

  I'm designing a carpool system (drivers can publish their routes and passengers can subscribe to them) with WebServices(axis2) and Android clients (ksoap2). I have been having problems with the logical architecture of the system and I wondered if this architecture is fine. And another question: for that architecture (if it is ok), how would be the packages structure? I suppose something like that: (In android) package org.carpool.presentation *All the activities here (and maybe mvc pattern) (In the server) package org.carpool.services *Public interfaces (for example: register(User user), publishRoute(Route route) ) package org.carpool.domain *Pojos (for example: User.java, Route.java, etc) package org.carpool.persistence *Dao Interface and implementation (jdbc or hibernate)

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• Help me classify this type of software architecture

  - by Alex Burtsev

  I read some books about software architecture as we are using it in our project but I can't classify the architecture properly. It's some kind of Enterprise Architecture, but what exactly... SOA, ESB (Enterprise Service Bus), Message Bus, Event Driven SOA, there are so many terms in Enterprise software.... The system is based on custom XML messages exchanges between services. (it's not SOAP, nor any other XML based standard, just plain XML). These messages represent notifications (state changes) that are applied to the Domain model, (it's not like CRUD when you serialize the whole domain object, and pass it to service for persistence). The system is centralized, and system participants use different programming languages and frameworks (c++, c#, java). Also, messages are not processed at the moment they are received as they are stored first and the treatment begins on demand. It's called SOA+EDA -:)

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• Automated architecture validation

  - by P.Brian.Mackey

  I am aware of the fact that TFS 2010 ultimate edition can create and validate architecture diagrams. For example, I can create a new modeling project add Layer Diagram Add Layer called View Add BL Layer Add DL layer. Then I can validate this architecture as part of the build process when someone tries to check code into TFS. In other words, if the View references the DL then the compilation process will fail and the checkin will not be allowed. For those without an MSDN ultimate license, can FxCop or some 3rd party utility be used to validate architecture in an automated fashion? I prefer a TFS install-able plugin, but a local VS plugin will do.

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• S#arp Architecture 1.5 released

  - by AlecWhittington

  The past two weeks have been wonderful for me, spending 12 days on Oahu, Hawaii. Then followed up with the S#arp Architecture 1.5 release. It has been a short 4 months since taking over as the project lead and this is my first major milestone. With this release, we advance S# even more forward with the ASP.NET MVC 2 enhancements. What's is S#? Pronounced "Sharp Architecture," this is a solid architectural foundation for rapidly building maintainable web applications leveraging the ASP.NET MVC framework...(read more)

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• Sharp Architecture 1.9.5 Released

  - by AlecWhittington

  The S#arp Architecture team is proud to announce the release of version 1.9.5. This version has had the following changes: Upgraded to MVC 3 RTM Solution upgraded to .NET 4 Implementation of IDependencyResolver provided, but not implemented This marks the last scheduled release of 1.X for S#arp Architecture . The team is working hard to get the 2.0 release out the door and we hope to have a preview of that coming soon. With regards to IDependencyResolver, we have provided an implementation, but have...(read more)

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• Architecture diagram of a computer virus

  - by Shiraz Bhaiji

  I am looking for an architecture diagram of a computer virus. Does anyone have a link to a good example? Edit Looks like I am getting hammered with downvotes. I agree that there is no single architecture for a virus. But somethings must be included for a program to be a virus. Example for components in the SAD: Replication method Trigger Payload Hosts targeted Vulnerabilities targeted Anti detection method

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• Are there architecture smells?

  - by C. Ross

  There are tons of resources on the web referring to and listing code smells. However, I've never seen information on architectural smells. Is this defined somewhere, and is there a list available? Has any formal research been done into architecture defects, and their impact on project speed, defects, and the like? Edit: I wasn't really looking for a list in the answers, but documentation (on the web or in a book) about architecture smells.

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• Are there architecture smells?

  - by C. Ross

  There are tons of resources on the web referring to and listing code smells. However, I've never seen information on architectural smells. Is this defined somewhere, and is there a list available? Has any formal research been done into architecture defects, and their impact on project speed, defects, and the like? Edit: I wasn't really looking for a list in the answers, but documentation (on the web or in a book) about architecture smells.

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• Service-Oriented Architecture and Web Services

  Service oriented architecture is an architectural model for developing distributed systems across a network or the Internet. The main goal of this model is to create a collection of sub-systems to function as one unified system. This approach allows applications to work within the context of a client server relationship much like a web browser would interact with a web server. In this relationship a client application can request an action to be performed on a server application and are returned to the requesting client. It is important to note that primary implementation of service oriented architecture is through the use of web services. Web services are exposed components of a remote application over a network. Typically web services communicate over the HTTP and HTTPS protocols which are also the standard protocol for accessing web pages on the Internet.  These exposed components are self-contained and are self-describing.  Due to web services independence, they can be called by any application as long as it can be accessed via the network.  Web services allow for a lot of flexibility when connecting two distinct systems because the service works independently from the client. In this case a web services built with Java in a UNIX environment not will have problems handling request from a C# application in a windows environment. This is because these systems are communicating over an open protocol allowed by both environments. Additionally web services can be found by using UDDI. References: Colan, M. (2004). Service-Oriented Architecture expands the vision of web services, Part 1. Retrieved on August 21, 2011 from http://www.ibm.com/developerworks/library/ws-soaintro/index.html W3Schools.com. (2011). Web Services Introduction - What is Web Services. Retrieved on August 21, 2011 from http://www.w3schools.com/webservices/ws_intro.asp

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• Podcast Show Notes: Evolving Enterprise Architecture

  - by Bob Rhubart

  The latest series of ArchBeat podcast programs grew out of another virtual meet-up, held on March 11. As with previous meet-ups, I sent out a general invitation to the roster of previous ArchBeat panelists to join me on Skype to talk about whatever topic comes up. For this event, Oracle ACE Directors Mike van Alst and Jordan Braunstein  showed up, along with Oracle product manager Jeff Davies.  The result was an impressive and wide-ranging discussion on the evolution of Enterprise Architecture, the role of technology in EA, the impact of social computing, and challenge of having three generations of IT people at work in the enterprise – each with different perspectives on technology. Mike, Jordan, and Jeff talked for more than an hour, and the conversation was so good that slicing and dicing it to meet the time constraints for these podcasts has been a challenge. The first two segments of the conversation are now available. Listen to Part 1 Listen to Part 2 Part 3 will go live next week, and an unprecedented fourth segment will follow. These guys have strong opinions, and while there is common ground, they don’t always agree. But isn’t that what a community is all about? I suspect that you’ll have questions and comments after listening, so I encourage you to reach out to Mike, Jordan, and Jeff  via the following links: Mike van Alst Blog | Twitter | LinkedIn | Business |Oracle Mix | Oracle ACE Profile Jordan Braunstein Blog | Twitter | LinkedIn | Business | Oracle Mix | Oracle ACE Profile Jeff Davies Homepage | Blog | LinkedIn | Oracle Mix (Also check out Jeff’s book: The Definitive Guide to SOA: Oracle Service Bus)   Coming Soon ArchBeat’s microphones were there for the panel discussions at the recent Oracle Technology Network Architect Days in Dallas and Anaheim. Excerpts from those conversations will be available soon. Stay tuned: RSS Technorati Tags: oracle,otn,enterprise architecture,podcast. arch2arch,archbeat del.icio.us Tags: oracle,otn,enterprise architecture,podcast. arch2arch,archbeat

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• PHP - Making CMS (architecture, etc.)

  - by UnknownProgramer

  I'm in the stage of planning new CMS. Before I used WordPress and other open source CMS for my clients, but I always had to write new modules and even mess with the code in order to do certain things. Which as you understand is not the best thing to do. So I finally decided to make my own CMS to work with, the way I need. But before I start it, I would like to think it trough carefully to ensure that I won't need to rewrite it ground up, just because I forgot to include some feature into architecture or did it wrong. I would like to hear your thoughs and the most important I would like you to suggest me some articles or books on that subject, especially on architecture of such systems. I googled a few good books, but that is not enough. The way I'm planning to do it: PHP5, completely OOP, modules architecture. You make a page and add any modules you need there, but modules are not global, but local to a page so you can make two pages with the same module, but content will be different if you set different "content ID" for these two entities. But it can be set the same, so two pages has the same content of the modules put there. Also I plan to support online storage web service (like amazon S3) for images and files, so I would like to hear your thoughs on it too. Also I have not yet decided how to store language data. I don't want to use DB for that, but I haven't decided yet. Also I think I will support other DB with global DB class and separate DB wrappers for MySQL and other databases. And, well, I would appreciate any other information you can provide for that subject.

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• Best Architecture for ASP.NET WebForms Application

  - by stack man

  I have written an ASP.NET WebForms portal for a client. The project has kind of evolved rather than being properly planned and structured from the beginning. Consequently, all the code is mashed together within the same project and without any layers. The client is now happy with the functionality, so I would like to refactor the code such that I will be confident about releasing the project. As there seems to be many differing ways to design the architecture, I would like some opinions about the best approach to take. FUNCTIONALITY The portal allows administrators to configure HTML templates. Other associated "partners" will be able to display these templates by adding IFrame code to their site. Within these templates, customers can register and purchase products. An API has been implemented using WCF allowing external companies to interface with the system also. An Admin section allows Administrators to configure various functionality and view reports for each partner. The system sends out invoices and email notifications to customers. CURRENT ARCHITECTURE It is currently using EF4 to read/write to the database. The EF objects are used directly within the aspx files. This has facilitated rapid development while I have been writing the site but it is probably unacceptable to keep it like that as it is tightly coupling the db with the UI. Specific business logic has been added to partial classes of the EF objects. QUESTIONS The goal of refactoring will be to make the site scalable, easily maintainable and secure. 1) What kind of architecture would be best for this? Please describe what should be in each layer, whether I should use DTO's / POCO / Active Record pattern etc. 2) Is there a robust way to auto-generate DTO's / BOs so that any future enhancements will be simple to implement despite the extra layers? 3) Would it be beneficial to convert the project from WebForms to MVC?

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• Which architecture should I choose for this project?

  - by Jichao

  I have a project. The server which based on a phone PCI-board is responsible for received phone calls from the customer and then redirect the phone calls to the operators. I have decided to code the server using c++ programming language and qt framework because the PCI-board SDK's interface is c/c++ originated and for the sake of portability. The server need to send the information of the the customer to the operator while ringing the operator and the ui interface of the operator client should be browser-based. Now the key problem is how could the server notify the operator that there is a phone call for he/she. One architecture I have considered is like this, The operator browser client use ajax pooling the web server to check whether there is call to the client; the web server pooling the database server to check whether there is call; the desktop server(c++) wait for the phone calls and set the information in the database. The other operations such as hang up the phone call from the client, retransfer the phone call to the other operator also use this architecture. Then, is there any way other than pooling the server(js code setInterval('getDail', 1000)) to decide whether there is a call to the operator? Is this architecture feasible or should I use some terrific techniques that I do know such as web services,xml-rpc, soap???

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• Learning computer architecture as a programmer

  - by Samaursa

  I typically run across gurus at SO and other places (instructors, book authors etc.) that would say something along the lines "This will cause alignment issues" or other low level tidbits. I want to learn about all these tidbits that are relevant to programming. Now usually when I see low level books (computer architecture books for example) they are too low level and geared towards people whose primary area of interest is computer architecture and not software design. Do you have recommendations for books that go through low-level stuff that is relevant to programmers?

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• S#arp Architecture 1.5.2 released

  - by AlecWhittington

  It has been a few weeks since S#arp Architecture 1.5 RTM has been released. While it was a major success a few issues were found that needed to be addressed. These mostly involved the Visual Studio templates. What's new in S#arp Architecture 1.5.2? Merged the SharpArch.* assemblies into a single assembly (SharpArch.dll) Updated both VS 2008 and 2010 templates to reflect the use of the merged assembly Updated SharpArch.build with custom script that allows the merging of the assemblies. Copys new merged...(read more)

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• Resources for understanding iOS architecture [closed]

  - by BlackJack

  I recently finished reading Randall Hyde's excellent book Write Great Code: Volume 1: Understanding the Machine, and I have a much better knowledge of what's going on under the hood now. I want to start making iPhone apps, and there are lots of guides for that. Embracing my inner Hyde, however, I want to first learn about the iOS system architecture. Apple has a really good overview here: iOS Technology Overview Before I start, I wanted to know if there were any other good resources for understanding iOS architecture and using that knowledge for iPhone programming. Thanks.

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• Need explanation of hexagonal architecture

  - by Victor Grazi

  I am reading about Alistair Cockburn's Hexagonal Architecture http://alistair.cockburn.us/Hexagonal+architecture with interest. One claim he makes is: "Finally, the automated function regression tests detect any violation of the promise to keep business logic out of the presentation layer. The organization can detect, and then correct, the logic leak." I do not understand this point. Is he saying that because the test is headless, then calls to a ui layer will throw exceptions? That doesn't seem to be a very sound test!

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• Architecture - 32-bit handling 64-bit instructions

  - by tkoomzaaskz

  tomasz@tomasz-lenovo-ideapad-Y530:~$ lscpu Architecture: i686 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 2 On-line CPU(s) list: 0,1 Thread(s) per core: 1 Core(s) per socket: 2 Socket(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 23 Stepping: 6 CPU MHz: 2000.000 BogoMIPS: 4000.12 Cache L1d: 32K Cache L1i: 32K Cache L2: 3072K I can see that my architecture is 32-bit (i686). But CPU op-mode(s) are 32-bit and 64-bit. The question is: how come? How is it handled that a 32-bit processor performs 64-bit operations? I guess it's a lot slower than native 32-bit operations. Is it built-in processor functionality (to emulate being 64-bit) or is it software dependent? When does it make sense for a 32-bit processor to run 64-bit operations?

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• What would one call this architecture?

  - by Chris

  I have developed a distributed test automation system which consists of two different entities. One entity is responsible for triggering tests runs and monitoring/displaying their progress. The other is responsible for carrying out tests on that host. Both of these entities retrieve data from a central DB. Now, my first thought is that this is clearly a server-client architecture. After all, you have exactly one organizing entity and many entities that communicate with said entity. However, while the supposed clients to communicate to the server via RPC, they are not actually requesting services or information, rather they are simply reporting back test progress, in fact, once the test run has been triggered they can complete their tasks without connection to the server. The request for a service is actually made by the supposed server which triggers the clients to carry out tests. So would this still be considered a server-client architecture or is this something different?

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• What would one call this architecture?

  - by Chris

  I have developed a distributed test automation system which consists of two different entities. One entity is responsible for triggering tests runs and monitoring/displaying their progress. The other is responsible for carrying out tests on that host. Both of these entities retrieve data from a central DB. Now, my first thought is that this is clearly a server-client architecture. After all, you have exactly one organizing entity and many entities that communicate with said entity. However, while the supposed clients to communicate to the server via RPC, they are not actually requesting services or information, rather they are simply reporting back test progress, in fact, once the test run has been triggered they can complete their tasks without connection to the server. The request for a service is actually made by the supposed server which triggers the clients to carry out tests. So would this still be considered a server-client architecture or is this something different?

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• Entity framework architecture

  - by user1741807

  I want to make a entity framework application in Winforms C#. I'm new to entity framework, and don't know how to make the architecture. I want to have the model in a class library, and a GUI layer, and maybe a controller layer. I'm used to that architecture, but don't know have to handle the objects in other layers than the model. Have do I manage objects in the gui layer, when I can't have a reference to the model? I'm used to have some kind of dto, but what's the best way?

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• Simulating pass by reference for an array reference (i.e. a reference to a reference) in Java

  - by Leif Andersen

  I was wondering, in java, is it possible to in anyway, simulate pass by reference for an array? Yes, I know the language doesn't support it, but is there anyway I can do it. Say, for example, I want to create a method that reverses the order of all the elements in an array. (I know that this code snippet isn't the best example, as there is a better algorithms to do this, but this is a good example of the type of thing I want to do for more complex problems). Currently, I need to make a class like this: public static void reverse(Object[] arr) { Object[] tmpArr = new Object[arr.length]; count = arr.length - 1; for(Object i : arr) tmpArr[count--] = i; // I would like to do arr = tmpArr, but that will only make the shallow // reference tmpArr, I would like to actually change the pointer they passed in // Not just the values in the array, so I have to do this: count = arr.length - 1; for(Object i : tmpArr) arr[count--] = i; return; } Yes, I know that I could just swap the values until I get to the middle, and it would be much more efficient, but for other, more complex purposes, is there anyway that I can manipulate the actual pointer? Again, thank you.

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• Not able to compile dbus-ping-pong

  - by Mahipal

  I have downloaded files from http://cgit.collabora.com/git/user/alban/dbus-ping-pong.git/tree/ I am trying to compile it using the command gcc pkg-config --libs --cflags dbus-1 dbus-glib-1-2 glib-2.0 -o dbus-ping-pong dbus-ping-pong.c However, I get errors: /tmp/ccmJkxXb.o: In function g_once_init_enter: dbus-ping-pong.c:(.text+0x22): undefined reference to g_once_init_enter_impl /tmp/ccmJkxXb.o: In function dbus_glib_marshal_echo_srv__BOOLEAN__STRING_POINTER_POINTER: dbus-ping-pong.c:(.text+0x52): undefined reference to g_return_if_fail_warning dbus-ping-pong.c:(.text+0x79): undefined reference to g_return_if_fail_warning dbus-ping-pong.c:(.text+0x9d): undefined reference to g_value_peek_pointer dbus-ping-pong.c:(.text+0xac): undefined reference to g_value_peek_pointer dbus-ping-pong.c:(.text+0x109): undefined reference to g_value_set_boolean /tmp/ccmJkxXb.o: In function echo_ping_class_intern_init: dbus-ping-pong.c:(.text+0x122): undefined reference to g_type_class_peek_parent /tmp/ccmJkxXb.o: In function echo_ping_get_type: dbus-ping-pong.c:(.text+0x162): undefined reference to g_intern_static_string dbus-ping-pong.c:(.text+0x192): undefined reference to g_type_register_static_simple dbus-ping-pong.c:(.text+0x1a8): undefined reference to g_once_init_leave /tmp/ccmJkxXb.o: In function echo_ping_class_init: dbus-ping-pong.c:(.text+0x1cd): undefined reference to g_type_class_add_private dbus-ping-pong.c:(.text+0x1e2): undefined reference to dbus_g_object_type_install_info /tmp/ccmJkxXb.o: In function echo_ping_init: dbus-ping-pong.c:(.text+0x1fe): undefined reference to g_type_instance_get_private /tmp/ccmJkxXb.o: In function echo_ping: dbus-ping-pong.c:(.text+0x21d): undefined reference to g_strdup /tmp/ccmJkxXb.o: In function client: dbus-ping-pong.c:(.text+0x265): undefined reference to dbus_g_proxy_new_for_name dbus-ping-pong.c:(.text+0x2c3): undefined reference to dbus_g_proxy_call dbus-ping-pong.c:(.text+0x2d1): undefined reference to dbus_g_error_quark dbus-ping-pong.c:(.text+0x2f1): undefined reference to dbus_g_error_get_name dbus-ping-pong.c:(.text+0x305): undefined reference to g_printerr dbus-ping-pong.c:(.text+0x31d): undefined reference to g_printerr dbus-ping-pong.c:(.text+0x328): undefined reference to g_error_free dbus-ping-pong.c:(.text+0x358): undefined reference to g_print dbus-ping-pong.c:(.text+0x363): undefined reference to g_free /tmp/ccmJkxXb.o: In function main: dbus-ping-pong.c:(.text+0x38f): undefined reference to g_type_init dbus-ping-pong.c:(.text+0x3a3): undefined reference to dbus_g_bus_get dbus-ping-pong.c:(.text+0x3c7): undefined reference to g_object_new dbus-ping-pong.c:(.text+0x3df): undefined reference to g_type_check_instance_cast dbus-ping-pong.c:(.text+0x3f9): undefined reference to dbus_g_connection_register_g_object dbus-ping-pong.c:(.text+0x406): undefined reference to dbus_g_connection_get_connection dbus-ping-pong.c:(.text+0x426): undefined reference to dbus_bus_request_name dbus-ping-pong.c:(.text+0x43a): undefined reference to g_main_loop_new dbus-ping-pong.c:(.text+0x44a): undefined reference to g_main_loop_run How do I resolve this issue ?

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• SCRIPT REFERENCE PROFILER TO GET JAVASCRIPT REFERENCE DETAILS

  Many of us came through a scenario like, you need the details of total JS files referred to a web page. It's not a matter if all JS are directly referring through physical file. But now a days for cache purose we are embedding JS to the assembly. In these situations how you will get the JS reference details? Here coming ScriptReferenceProfiler.

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• Abstraction, Politics, and Software Architecture

  Abstraction can be defined as a general concept and/or idea that lack any concrete details. Throughout history this type of thinking has led to an array of new ideas and innovations as well as increased confusion and conspiracy. If one was to look back at our history they will see that abstraction has been used in various forms throughout our past. When I was growing up I do not know how many times I heard politicians say “Leave no child left behind” or “No child left behind” as a major part of their campaign rhetoric in regards to a stance on education. As you can see their slogan is a perfect example of abstraction because it only offers a very general concept about improving our education system but they do not mention how they would like to do it. If they did then they would be adding concrete details to their abstraction thus turning it in to an actual working plan as to how we as a society can help children succeed in school and in life, but then they would not be using abstraction. By now I sure you are thinking what does abstraction have to do with software architecture. You are valid in thinking this way, but abstraction is a wonderful tool used in information technology especially in the world of software architecture. Abstraction is one method of extracting the concepts of an idea so that it can be understood and discussed by others of varying technical abilities and backgrounds. One ways in which I tend to extract my architectural design thoughts is through the use of basic diagrams to convey an idea for a system or a new feature for an existing application. This allows me to generically model an architectural design through the use of views and Unified Markup Language (UML). UML is a standard method for creating a 4+1 Architectural View Models. The 4+1 Architectural View Model consists of 4 views typically created with UML as well as a general description of the concept that is being expressed by a model. The 4+1 Architectural View Model: Logical View: Models a system’s end-user functionality. Development View: Models a system as a collection of components and connectors to illustrate how it is intended to be developed.  Process View: Models the interaction between system components and connectors as to indicate the activities of a system. Physical View: Models the placement of the collection of components and connectors of a system within a physical environment. Recently I had to use the concept of abstraction to express an idea for implementing a new security framework on an existing website. My concept would add session based management in order to properly secure and allow page access based on valid user credentials and last user activity.  I created a basic Process View by using UML diagrams to communicate the basic process flow of my changes in the application so that all of the projects stakeholders would be able to understand my idea. Additionally I created a Logical View on a whiteboard while conveying the process workflow with a few stakeholders to show how end-user will be affected by the new framework and gaining additional input about the design. After my Logical and Process Views were accepted I then started on creating a more detailed Development View in order to map how the system will be built based on the concept of components and connections based on the previously defined interactions. I really did not need to create a Physical view for this idea because we were updating an existing system that was already deployed based on an existing Physical View. What do you think about the use of abstraction in the development of software architecture? Please let me know.

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