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• Security Access Control With Solaris Virtualization

  - by Thierry Manfe-Oracle

  Numerous Solaris customers consolidate multiple applications or servers on a single platform. The resulting configuration consists of many environments hosted on a single infrastructure and security constraints sometimes exist between these environments. Recently, a customer consolidated many virtual machines belonging to both their Intranet and Extranet on a pair of SPARC Solaris servers interconnected through Infiniband. Virtual Machines were mapped to Solaris Zones and one security constraint was to prevent SSH connections between the Intranet and the Extranet. This case study gives us the opportunity to understand how the Oracle Solaris Network Virtualization Technology —a.k.a. Project Crossbow— can be used to control outbound traffic from Solaris Zones. Solaris Zones from both the Intranet and Extranet use an Infiniband network to access a ZFS Storage Appliance that exports NFS shares. Solaris global zones on both SPARC servers mount iSCSI LU exported by the Storage Appliance.  Non-global zones are installed on these iSCSI LU. With no security hardening, if an Extranet zone gets compromised, the attacker could try to use the Storage Appliance as a gateway to the Intranet zones, or even worse, to the global zones as all the zones are reachable from this node. One solution consists in using Solaris Network Virtualization Technology to stop outbound SSH traffic from the Solaris Zones. The virtualized network stack provides per-network link flows. A flow classifies network traffic on a specific link. As an example, on the network link used by a Solaris Zone to connect to the Infiniband, a flow can be created for TCP traffic on port 22, thereby a flow for the ssh traffic. A bandwidth can be specified for that flow and, if set to zero, the traffic is blocked. Last but not least, flows are created from the global zone, which means that even with root privileges in a Solaris zone an attacker cannot disable or delete a flow. With the flow approach, the outbound traffic of a Solaris zone is controlled from outside the zone. Schema 1 describes the new network setting once the security has been put in place. Here are the instructions to create a Crossbow flow as used in Schema 1 : (GZ)# zoneadm -z zonename halt ...halts the Solaris Zone. (GZ)# flowadm add-flow -l iblink -a transport=TCP,remote_port=22 -p maxbw=0 sshFilter  ...creates a flow on the IB partition "iblink" used by the zone to connect to the Infiniband.  This IB partition can be identified by intersecting the output of the commands 'zonecfg -z zonename info net' and 'dladm show-part'.  The flow is created on port 22, for the TCP traffic with a zero maximum bandwidth.  The name given to the flow is "sshFilter". (GZ)# zoneadm -z zonename boot  ...restarts the Solaris zone now that the flow is in place.Solaris Zones and Solaris Network Virtualization enable SSH access control on Infiniband (and on Ethernet) without the extra cost of a firewall. With this approach, no change is required on the Infiniband switch. All the security enforcements are put in place at the Solaris level, minimizing the impact on the overall infrastructure. The Crossbow flows come in addition to many other security controls available with Oracle Solaris such as IPFilter and Role Based Access Control, and that can be used to tackle security challenges.

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• Approach for packing 2D shapes while minimizing total enclosing area

  - by Dennis

  Not sure on my tags for this question, but in short .... I need to solve a problem of packing industrial parts into crates while minimizing total containing area. These parts are motors, or pumps, or custom-made components, and they have quite unusual shapes. For some, it may be possible to assume that a part === rectangular cuboid, but some are not so simple, i.e. they assume a shape more of that of a hammer or letter T. With those, (assuming 2D shape), by alternating direction of top & bottom, one can pack more objects into the same space, than if all tops were in the same direction. Crude example below with letter "T"-shaped parts: ***** xxxxx ***** x ***** *** ooo * x vs * x vs * x vs * x o * x * xxxxx * x * x o xxxxx xxx Right now we are solving the problem by something like this: using CAD software, make actual models of how things fit in crate boxes make estimates of actual crate dimensions & write them into Excel file (1) is crazy amount of work and as the result we have just a limited amount of possible entries in (2), the Excel file. The good things is that programming this is relatively easy. Given a combination of products to go into crates, we do a lookup, and if entry exists in the Excel (or Database), we bring it out. If it doesn't, we say "sorry, no data!". I don't necessarily want to go full force on making up some crazy algorithm that given geometrical part description can align, rotate, and figure out best part packing into a crate, given its shape, but maybe I do.. Question Well, here is my question: assuming that I can represent my parts as 2D (to be determined how), and that some parts look like letter T, and some parts look like rectangles, which algorithm can I use to give me a good estimate on the dimensions of the encompassing area, while ensuring that the parts are packed in a minimal possible area, to minimize crating/shipping costs? Are there approximation algorithms? Seeing how this can get complex, is there an existing library I could use? My thought / Approach My naive approach would be to define a way to describe position of parts, and place the first part, compute total enclosing area & dimensions. Then place 2nd part in 0 degree orientation, repeat, place it at 180 degree orientation, repeat (for my case I don't think 90 degree rotations will be meaningful due to long lengths of parts). Proceed using brute force "tacking on" other parts to the enclosing area until all parts are processed. I may have to shift some parts a tad (see 3rd pictorial example above with letters T). This adds a layer of 2D complexity rather than 1D. I am not sure how to approach this. One idea I have is genetic algorithms, but I think those will take up too much processing power and time. I will need to look out for shape collisions, as well as adding extra padding space, since we are talking about real parts with irregularities rather than perfect imaginary blocks. I'm afraid this can get geometrically messy fairly fast, and I'd rather keep things simple, if I can. But what if the best (practical) solution is to pack things into different crate boxes rather than just one? This can get a bit more tricky. There is human element involved as well, i.e. like parts can go into same box and are thus a constraint to be considered. Some parts that are not the same are sometimes grouped together for shipping and can be considered as a common grouped item. Sometimes customers want things shipped their way, which adds human element to constraints. so there will have to be some customization.

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• Consolidation in a Database Cloud

  - by B R Clouse

  Consolidation of multiple databases onto a shared infrastructure is the next step after Standardization.  The potential consolidation density is a function of the extent to which the infrastructure is shared.  The three models provide increasing degrees of sharing: Server: each database is deployed in a dedicated VM. Hardware is shared, but most of the software infrastructure is not. Standardization is often applied incompletely since operating environments can be moved as-is onto the shared platform. The potential for VM sprawl is an additional downside. Database: multiple database instances are deployed on a shared software / hardware infrastructure. This model is very efficient and easily implemented with the features in the Oracle Database and supporting products. Many customers have moved to this model and achieved significant, measurable benefits. Schema: multiple schemas are deployed within a single database instance. The most efficient model, it places constraints on the environment. Usually this model will be implemented only by customers deploying their own applications.  (Note that a single deployment can combine Database and Schema consolidations.) Customer value: lower costs, better system utilization In this phase of the maturity model, under-utilized hardware can be used to host more workloads, or retired and those workloads migrated to consolidation platforms. Customers benefit from higher utilization of the hardware resources, resulting in reduced data center floor space, and lower power and cooling costs. And, the OpEx savings from Standardization are multiplied, since there are fewer physical components (both hardware and software) to manage. Customer value: higher productivity The OpEx benefits from Standardization are compounded since not only are there fewer types of things to manage, now there are fewer entities to manage. In this phase, customers discover that their IT staff has time to move away from "day-to-day" tasks and start investing in higher value activities. Database users benefit from consolidating onto shared infrastructures by relieving themselves of the requirement to maintain their own dedicated servers. Also, if the shared infrastructure offers capabilities such as High Availability / Disaster Recovery, which are often beyond the budget and skillset of a standalone database environment, then moving to the consolidation platform can provide access to those capabilities, resulting in less downtime. Capabilities / Characteristics In this phase, customers will typically deploy fixed-size clusters and consolidate on a cluster until that cluster is deemed "full," at which point a new cluster is built. Customers will define one or a few cluster architectures that are used wherever possible; occasionally there may be deployments which must be handled as exceptions. The "full" policy may be based on number of databases deployed on the cluster, or observed peak workload, etc. IT will own the provisioning of new databases on a cluster, making the decision of when and where to place new workloads. Resources may be managed dynamically, e.g., as a priority workload increases, it may be given more CPU and memory to handle the spike. Users will be charged at a fixed, relatively coarse level; or in some cases, no charging will be applied. Activities / Tasks Oracle offers several tools to plan a successful consolidation. Real Application Testing (RAT) has a feature to help plan and validate database consolidations. Enterprise Manager 12c's Cloud Management Pack for Database includes a planning module. Looking ahead, customers should start planning for the Services phase by defining the Service Catalog that will be made available for database services.

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• Migrating VB6 to HTML5 is not a fiction - Customer success story

  - by Webgui

  All of you VB developers in the present or past would probably find it hard to believe that the old VB code can be migrated and modernized into the latest .NET based HTML5 without having to rewrite the application. But we have been working on such tools for the past couple of years and already have several real world applications that were fully 'transposed' from VB6. The solution is called Instant CloudMove and its main tool is called the TranspositionStudio. It is a unique solution that relies on the concept of transposition. Transposition comes from mathematics and music and refers to exchanging elements while everything else remains the same or moving an element as is from one environment to another. This means that we are taking the source code and put it in a modern technological environment with relatively few adjustments.The concept is based on a set of Mapping Expressions which are basically links between an element in the source environment and one in the target environment that has the same functionality. About 95% of the code is usually mapped out-of-the-box and the rest is handled with easy-to-use mapping tools designed for Visual Studio developers providing them with a familiar environment and concepts for completing the mapping and allowing them to extend and customize existing mapping expressions. The solution is also based on a circular workflow that enables developers to make any changes as required until the result is satisfying.As opposed to existing migration solutions that offer automation are usually a “black box” to the user, the transposition concept enables full visibility, flexibility and control over the code and process at all times allowing to also add/change functionalities or upgrade the UI within the process and tools.This is exactly the case with our customer’s aging VB6 PMS (Property Management System) which needed a technological update as well as a design refresh. The decision was to move the VB6 application which had about 1 million lines of code into the latest web technology. Since the application was initially written 13 years ago and had many upgrades since the code must be very patchy and includes unused sections. As a result, the company Mihshuv Group considered rewriting the entire application in Java since it already had the knowledge. Rewrite would allow starting with a clean slate and designing functionality, database architecture, UI without any constraints. On the other hand, rewrite entitles a long and detailed specification work as well as a thorough QA and this translates into a long project with high risk and costs.So the company looked for a migration solution as an alternative; the research lead to Gizmox and after examining the technology it was decided to perform a hybrid project which would include an automatic transposition of the core of the VB6 application (200,000 lines of code) while they redesigning the UI, adding new functionality, deleting unused code and rewriting about 140 reports with Crystal Reports will be done manually using Visual WebGui development tools.The migration part of the project was completed in 65 days by 3 developers from Mihshuv Group guided by Gizmox migration experts while the rewrite and UI upgrade tasks took about the same. So in only a few months period Mihshuv Group generated an up-to-date product, written in the latest Web technology with modern, friendly UI and improved functionality. Guest selection screen of the original VB6 PMS Guest selection screen on the new web–based PMS Compared to the initial plan to rewrite the entire application in Java, the hybrid migration/rewrite approach taken by Mihshuv Group using Gizmox technology proved as a great decision. In terms of time and cost there were substantial savings; from a project that was priced for at least a year (without taking into account the huge risk and uncertainty) it became a few months project only. More about this and other customer stories can be found here

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• Come up with a real-world problem in which only the best solution will do (a problem from Introduction to algorithms) [closed]

  - by Mike

  EDITED (I realized that the question certainly needs a context) The problem 1.1-5 in the book of Thomas Cormen et al Introduction to algorithms is: "Come up with a real-world problem in which only the best solution will do. Then come up with one in which a solution that is “approximately” the best is good enough." I'm interested in its first statement. And (from my understanding) it is asked to name a real-world problem where only the exact solution will work as opposed to a real-world problem where good-enough solution will be ok. So what is the difference between the exact and good enough solution. Consider some physics problem for example the simulation of the fulid flow in the permeable medium. To make this simulation happen some simplyfing assumptions have to be made when deriving a mathematical model. Otherwise the model becomes at least complex and unsolvable. Virtually any particle in the universe has its influence on the fluid flow. But not all particles are equal. Those that form the permeable medium are much more influental than the ones located light years away. Then when the mathematical model needs to be solved an exact solution can rarely be found unless the mathematical model is simple enough (wich probably means the model isn't close to reality). We take an approximate numerical method and after hours of coding and days of verification come up with the program or algorithm which is a solution. And if the model and an algorithm give results close to a real problem by some degree that is good enough soultion. Its worth noting the difference between exact solution algorithm and exact computation result. When considering real-world problems and real-world computation machines I believe all physical problems solutions where any calculations are taken can not be exact because universal physical constants are represented approximately in the computer. Any numbers are represented with the limited precision, at least limited by amount of memory available to computing machine. I can imagine plenty of problems where good-enough, good to some degree solution will work, like train scheduling, automated trading, satellite orbit calculation, health care expert systems. In that cases exact solutions can't be derived due to constraints on computation time, limitations in computer memory or due to the nature of problems. I googled this question and like what this guy suggests: there're kinds of mathematical problems that need exact solutions (little note here: because the question is taken from the book "Introduction to algorithms" the term "solution" means an algorithm or a program, which in this case gives exact answer on each input). But that's probably more of theoretical interest. So I would like to narrow down the question to: What are the real-world practical problems where only the best (exact) solution algorithm or program will do (but not the good-enough solution)? There are problems like breaking of cryptographic ciphers where only exact solution matters in practice and again in practice the process of deciphering without knowing a secret should take reasonable amount of time. Returning to the original question this is the problem where good-enough (fast-enough) solution will do there's no practical need in instant crack though it's desired. So the quality of "best" can be understood in any sense: exact, fastest, requiring least memory, having minimal possible network traffic etc. And still I want this question to be theoretical if possible. In a sense that there may be example of computer X that has limited resource R of amount Y where the best solution to problem P is the one that takes not more than available Y for inputs of size N*Y. But that's the problem of finding solution for P on computer X which is... well, good enough. My final thought that we live in a world where it is required from programming solutions to practical purposes to be good enough. In rare cases really very very good but still not the best ones. Isn't it? :) If it's not can you provide an example? Or can you name any such unsolved problem of practical interest?

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• How to make a stack stable? Need help for an explicit resting contact scheme (2-dimensional)

  - by Register Sole

  Previously, I struggle with the sequential impulse-based method I developed. Thanks to jedediah referring me to this paper, I managed to rebuild the codes and implement the simultaneous impulse based method with Projected-Gauss-Seidel (PGS) iterative solver as described by Erin Catto (mentioned in the reference of the paper as [Catt05]). So here's how it currently is: The simulation handles 2-dimensional rotating convex polygons. Detection is using separating-axis test, with a SKIN, meaning closest points between two polygons is detected and determined if their distance is less than SKIN. To resolve collision, simultaneous impulse-based method is used. It is solved using iterative solver (PGS-solver) as in Erin Catto's paper. Error-correction is implemented using Baumgarte's stabilization (you can refer to either paper for this) using J V = beta/dt*overlap, J is the Jacobian for the constraints, V the matrix containing the velocities of the bodies, beta an error-correction parameter that is better be < 1, dt the time-step taken by the engine, and overlap, the overlap between the bodies (true overlap, so SKIN is ignored). However, it is still less stable than I expected :s I tried to stack hexagons (or squares, doesn't really matter), and even with only 4 to 5 of them, they would swing! Also note that I am not looking for a sleeping scheme. But I would settle if you have any explicit scheme to handle resting contacts. That said, I would be more than happy if you have a way of treating it generally (as continuous collision, instead of explicitly as a special state). Ideas I have tried: Using simultaneous position based error correction as described in the paper in section 5.3.2, turned out to be worse than the current scheme. If you want to know the parameters I used: Hexagons, side 50 (pixels) gravity 2400 (pixels/sec^2) time-step 1/60 (sec) beta 0.1 restitution 0 to 0.2 coeff. of friction 0.2 PGS iteration 10 initial separation 10 (pixels) mass 1 (unit is irrelevant for now, i modified velocity directly<-impulse method) inertia 1/1000 Thanks in advance! I really appreciate any help from you guys!! :) EDIT In response to Cholesky's comment about warm starting the solver and Baumgarte: Oh right, I forgot to mention! I do save the contact history and the impulse determined in this time step to be used as initial guess in the next time step. As for the Baumgarte, here's what actually happens in the code. Collision is detected when the bodies' closest distance is less than SKIN, meaning they are actually still separated. If at this moment, I used the PGS solver without Baumgarte, restitution of 0 alone would be able to stop the bodies, separated by a distance of ~SKIN, in mid-air! So this isn't right, I want to have the bodies touching each other. So I turn on the Baumgarte, where its role is actually to pull the bodies together! Weird I know, a scheme intended to push the body apart becomes useful for the reverse. Also, I found that if I increase the number of iteration to 100, stacks become much more stable, though the program becomes so slow. UPDATE Since the stack swings left and right, could it be something is wrong with my friction model? Current friction constraint: relative_tangential_velocity = 0

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• Career-Defining Moments

  - by Robz / Fervent Coder

  Originally posted on: http://geekswithblogs.net/robz/archive/2013/06/25/career-defining-moments.aspx Fear holds us back from many things. A little fear is healthy, but don’t let it overwhelm you into missing opportunities. In every career there is a moment when you can either step forward and define yourself, or sit down and regret it later. Why do we hold back: is it fear, constraints, family concerns, or that we simply can't do it? I think in many cases it comes to the unknown, and we are good at fearing the unknown. Some people hold back because they are fearful of what they don’t know. Some hold back because they are fearful of learning new things. Some hold back simply because to take on a new challenge it means they have to give something else up. The phrase sometimes used is “It’s the devil you know versus the one you don’t.” That fear sometimes allows us to miss great opportunities. In many people’s case it is the opportunity to go into business for yourself, to start something that never existed. Most hold back hear for a fear of failing. We’ve all heard the phrase “What would you do if you knew you couldn’t fail?”, which is intended to get people to think about the opportunities they might create. A better term I heard recently on the Ruby Rogues podcast was “What would be worth doing even if you knew you were going to fail?” I think that wording suits the intent better. If you knew (or thought) going in that you were going to fail and you didn’t care, it would open you up to the possibility of paying more attention to the journey and not the outcome. In my case it is a fear of acceptance. I am fearful that I may not learn what I need to learn or may not do a good enough job to be accepted. At the same time that fear drives me and makes me want to leap forward. Some folks would define this as “The Flinch”. I’m learning Ruby and Puppet right now. I have limited experience with both, limited to the degree it scares me some that I don’t know much about either. Okay, it scares me quite a bit! Some people’s defining moment might be going to work for Microsoft. All of you who know me know that I am in love with automation, from low-tech to high-tech automation. So for me, my “mecca” is a little different in that regard. Awhile back I sat down and defined where I wanted my career to go and it had to do more with DevOps, defined as applying developer practices to system administration operations (I could not find this definition when I searched). It’s an area that interests me and why I really want to expand chocolatey into something more awesome. I want to see Windows be as automatable and awesome as other operating systems that are out there. Back to the career-defining moment. Sometimes these moments only come once in a lifetime. The key is to recognize when you are in one of these moments and step back to evaluate it before choosing to dive in head first. So I am about to embark on what I define as one of these “moments.”  On July 1st I will be joining Puppet Labs and working to help make the Windows automation experience rock solid! I’m both scared and excited about the opportunity!

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• Cloud Fact for Business Managers #3: Where You Data Is, and Who Has Access to It Might Surprise You

  - by yaldahhakim

  Written by: David Krauss While data security and operational risk conversations usually happen around the desk of a CCO/CSO (chief compliance and/or security officer), or perhaps the CFO, since business managers are now selecting cloud providers, they need to be able to at least ask some high-level questions on the topic of risk and compliance.  While the report found that 76% of adopters were motivated to adopt cloud apps because of quick access to software, most of these managers found that after they made a purchase decision their access to exciting new capabilities in the cloud could be hindered due to performance and scalability constraints put forth  by their cloud provider.  If you are going to let your business consume their mission critical business applications as a service, then it’s important to understand who is providing those cloud services and what kind of performance you are going to get.  Different types of departments, companies and industries will all have unique requirements so it’s key to take this also into consideration.   Nothing puts a CEO in a bad mood like a public data breach or finding out the company lost money when customers couldn’t buy a product or service because your cloud service provider had a problem.  With 42% of business managers having seen a data security breach in their department associated directly with the use of cloud applications, this is happening more than you think.   We’ve talked about the importance of being able to avoid information silos through a unified cloud approach and platform.  This is also important when keeping your data safe and secure, and a key conversation to have with your cloud provider.  Your customers want to know that their information is protected when they do business with you, just like you want your own company information protected.   This is really hard to do when each line of business is running different cloud application services managed by different cloud providers, all with different processes and controls.   It only adds to the complexity, and the more complex, the more risky and the chance that something will go wrong. What about compliance? Depending on the cloud provider, it can be difficult at best to understand who has access to your data, and were your data is actually stored.  Add to this multiple cloud providers spanning multiple departments and it becomes very problematic when trying to comply with certain industry and country data security regulations.  With 73% of business managers complaining that having cloud data handled externally by one or more cloud vendors makes it hard for their department to be compliant, this is a big time suck for executives and it puts the organization at risk. Is There A Complete, Integrated, Modern Cloud Out there for Business Executives?If you are a business manager looking to drive faster innovation for your business and want a cloud application that your CIO would approve of, I would encourage you take a look at Oracle Cloud.  It’s everything you want from a SaaS based application, but without compromising on functionality and other modern capabilities like embedded business intelligence, social relationship management (for your entire business), and advanced mobile.  And because Oracle Cloud is built and managed by Oracle, you can be confident that your cloud application services are enterprise-grade.  Over 25 Million users and 10 thousands companies around the globe rely on Oracle Cloud application services everyday – maybe your business should too.  For more information, visit cloud.oracle.com. Additional Resources •    Try it: cloud.oracle.com•    Learn more: http://www.oracle.com/us/corporate/features/complete-cloud/index.html•    Research Report: Cloud for Business Managers: The Good, the Bad, and the Ugly

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• Path Not Found error when opening VB6 project from a shared folder on Virtual PC 2007 (XP sp3)

  - by law1185

  I currently work on a small software team that primarily maintains legacy software. I am trying to set up a VirtualPC that we can use to do this maintenance. Specifically, I would like to be able to debug and run VB6 web apps from a folder on the host pc. My constraints are as follows: The VirtualPC will not be registered on the domain. The server that hosts our Subversion repository does not run the subversion service so the only way to interact with the repository is through "file:\\", which requires domain authentication. It is not possible to debug/run VB6 web apps that are located on mapped network drives, because IIS requires that the VirtualPC be on the same domain as the network drive I would like to avoid having to copy the folder from the host pc to the VirtualPC and then copying it back in order to have the latest revision from Subversion So, I am trying to use VirtualPC's shared folder feature to share the host machine's Subversion directory and open the project in VB6 on the VirtualPC. Problem is that Visual Basic throws the error: "Path not found: '\\C:\\Subversion\Path\Project.vbp'" when I try to open it. Folder C:\Subversion on the host machine is mapped to G: on the VirtualPC. If anyone can help me resolve this error or find some other way to accomplish this, I would be deeply grateful. Oh, both host and virtual OS is Windows XP sp3. Using VB 6.0, IIS v5.1. I can manipulate files in the shared directory freely from the VirtualPC ie. copy, paste, delete, etc. Edit: Link to screenshot: http://img190.imageshack.us/img190/5439/vpcscreen.png

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• Entity Framework: Delete Object and its related entities

  - by Waheed

  Hi, Does anyone know how to delete an object and all of it's related entities. For example i have tables, Products, Category, ProductCategory and productDetails, the productCategory is joining table of both Product and Category. I have red from http://msdn.microsoft.com/en-us/library/bb738580.aspx that Deleting the parent object also deletes all the child objects in the constrained relationship. This result is the same as enabling the CascadeDelete property on the association for the relationship. I am using this code Product productObj = this.ObjectContext.Product.Where(p => p.ProductID.Equals(productID)).First(); if (!productObj.ProductCategory.IsLoaded) productObj.ProductCategory.Load(); if (!productObj.ProductDetails.IsLoaded) productObj.ProductDetails.Load(); //my own methods. base.Delete(productObj); base.SaveAllObjectChanges(); But i am getting error on ObjectContext.SaveChanges(); i.e A relationship is being added or deleted from an AssociationSet 'FK_ProductCategory_Product'. With cardinality constraints, a corresponding 'ProductCategory' must also be added or deleted. Thanks in advance....

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• Applying Test Driven Development to a tightly coupled architecture

  - by Chris D

  Hi all, I've recently been studying TDD, attended a conference and have dabbled in few tests and already I'm 100% sold, I absolutely love it TDD. As a result I've raised this with my seniors and they are prepared to give it a chance, so they have tasked me with coming up with a way to implement TDD in the development of our enterprise product. The problem is our system has evolved since the days of VB6 to .NET and implements alot of legacy technology and some far from best practice development techniques i.e. alot of business logic in the ASP.NET code behind and client script. The largest problem however is how our classes are tightly coupled with database access; properties, methods, constructors - usually has some database access in some form or another. We use an in-house data access code generator tool that creates sqlDataAdapters that gives us all the database access we could ever want, which helps us develop extremely quickly, however, classes in our business layer are very tightly coupled to this data layer - we aren't even close to implementing some form of repository design. This and the issues above have created me all sorts of problems. I have tried to develop some unit tests for some existing classes I've already written but the tests take ALOT longer to run since db access is required, not to mention since we use the MS Enterprise Caching framework I am forced to fake a httpcontext for my tests to run successfully which isn't practical. Also, I can't see how to use TDD to drive the design of any new classes I write since they have to be soo tightly coupled to the database ... help! Because of the architecture of the system it appears I can't implement TDD without some real hack which in my eyes just defeats the aim of TDD and the huge benefits that come with. Does anyone have any suggestions how I could implement TDD with the constraints I'm bound too? or do I need to push the repository design pattern down my seniors throats and tell them we either change our architecture/development methodology or forget about TDD altogether? :) Thanks

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• Asp.net MVC Route class that supports catch-all parameter anywhere in the URL

  - by Robert Koritnik

  the more I think about it the more I believe it's possible to write a custom route that would consume these URL definitions: {var1}/{var2}/{var3} Const/{var1}/{var2} Const1/{var1}/Const2/{var2} {var1}/{var2}/Const as well as having at most one greedy parameter on any position within any of the upper URLs like {*var1}/{var2}/{var3} {var1}/{*var2}/{var3} {var1}/{var2}/{*var3} There is one important constraint. Routes with greedy segment can't have any optional parts. All of them are mandatory. Example This is an exemplary request http://localhost/Show/Topic/SubTopic/SubSubTopic/123/This-is-an-example This is URL route definition {action}/{*topicTree}/{id}/{title} Algorithm Parsing request route inside GetRouteData() should work like this: Split request into segments: Show Topic SubTopic SubSubTopic 123 This-is-an-example Process route URL definition starting from the left and assigning single segment values to parameters (or matching request segment values to static route constant segments). When route segment is defined as greedy, reverse parsing and go to the last segment. Parse route segments one by one backwards (assigning them request values) until you get to the greedy catch-all one again. When you reach the greedy one again, join all remaining request segments (in original order) and assign them to the greedy catch-all route parameter. Questions As far as I can think of this, it could work. But I would like to know: Has anyone already written this so I don't have to (because there are other aspects to parsing as well that I didn't mention (constraints, defaults etc.) Do you see any flaws in this algorithm, because I'm going to have to write it myself if noone has done it so far. I haven't thought about GetVirtuaPath() method at all.

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• Developer certificate vs purchased certificate for WCF

  - by RemotecUk

  I understsand that if I want to use authentication in WCF then I need to install a certificate on my server which WCF will use to encrypt data passing between my server and client. For development purposes I believe I can use the makecert.exe util. to make a development certificate. What is the worst that can happen if I use this certificate on the production environment? and... Why cant I use this certificate on the production environment? and ... What is the certificate actually going to do in this scenario? [Edit: Added another question] finally... In a scenario where the website has a certificate installed to provide HTTPS support can the same certificate be used for the WCF services as well? Note on my application: Its a NetTCP client and server service. The users will log in using the same username and password which they use for the website which is passed in clear text. I would be happy to pass the u/n + p/w in cleartext to WCF but this isnt allowed by the framework and a certificate must be in place. However, I dont want to buy an certificate due to budget constraints! (Sorry for the possibly stupid question but I really dont understand this so would welcome some help with this).

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• A tool to aid completion of missing or incomplete source code documentation

  - by Pekka

  I have several finished, older PHP projects with a lot of includes that I would like to document in javadoc/phpDocumentor style. While working through each file manually and being forced to do a code review alongside the documenting would be the best thing, I am, simply out of time constraints, interested in tools to help me automate the task as much as possible. The tool I am thinking about would ideally have the following features: Parse a PHP project tree and tell me where there are undocumented files, classes, and functions/methods (i.e. elements missing the appropriate docblock comment) Provide a method to half-way easily add the missing docblocks by creating the empty structures and, ideally, opening the file in an editor (internal or external I don't care) so I can put in the description. Optional: Automatic recognition of parameter types, return values and such. But that's not really required. The language in question is PHP, though I could imagine that a C/Java tool might be able to handle PHP files after some tweaking. Looking forward to your suggestions! Bounty There are already very good suggestions for this (that I have not yet had the time to check out) to point out the gaps, but none yet providing aid in filling them. I want to give the question some more exposure, maybe there is some sort of a graphical extension to php_codesniffer to achieve the level of automation I'm dreaming of. Looking forward to any additional input!

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• Difference between DataTable.Load() and DataTable = dataSet.Tables[];

  - by subbu

  Hi All , I have a doubt i use the following piece of code get data from a SQLlite data base and Load it into a data table "SQLiteConnection cnn = new SQLiteConnection("Data Source=" + path); cnn.Open(); SQLiteCommand mycommand = new SQLiteCommand(cnn); string sql = "select Company,Phone,Email,Address,City,State,Zip,Country,Fax,Web from RecordsTable"; mycommand.CommandText = sql; SQLiteDataReader reader = mycommand.ExecuteReader(); dt.Load(reader); reader.Close(); cnn.Close();" In some cases when I try to load it Gives me "Failed to enable constraints exception" But when I tried this below given piece of code for same table and same set of records it worked "SQLiteConnection ObjConnection = new SQLiteConnection("Data Source=" + path); SQLiteCommand ObjCommand = new SQLiteCommand("select Company,Phone,Email,Address,City,State,Zip,Country,Fax,Web from RecordsTable", ObjConnection); ObjCommand.CommandType = CommandType.Text; SQLiteDataAdapter ObjDataAdapter = new SQLiteDataAdapter(ObjCommand); DataSet dataSet = new DataSet(); ObjDataAdapter.Fill(dataSet, "RecordsTable"); dt = dataSet.Tables["RecordsTable"]; " Can any one tell me what is the difference between two

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• Android - drawing path as overlay on MapView

  - by Rabas

  Hello, I have a class that extends Overlay and implemments Overlay.Snappable. I have overriden its draw method: @Override public void draw(Canvas canvas, MapView mv, boolean shadow) { Projection projection = mv.getProjection(); ArrayList<GeoPoint> geoPoints = new ArrayList<GeoPoint>(); //Creating geopoints - ommited for readability Path p = new Path(); for (int i = 0; i < geoPoints.size(); i++) { if (i == geoPoints.size() - 1) { break; } Point from = new Point(); Point to = new Point(); projection.toPixels(geoPoints.get(i), from); projection.toPixels(geoPoints.get(i + 1), to); p.moveTo(from.x, from.y); p.lineTo(to.x, to.y); } Paint mPaint = new Paint(); mPaint.setStyle(Style.FILL); mPaint.setColor(0xFFFF0000); mPaint.setAntiAlias(true); canvas.drawPath(p, mPaint); super.draw(canvas, mv, shadow); } As you can see, I make a list of points on a map and I want them to form a polygonal shape. Now, the problem is that when I set paint style to be FILL or FILL_AND_STROKE nothing shows up on the screen, but when I set it to be just stroke, and set stroke width, it acctually draws what it is supposed to draw. Now, I looked for solution, but nothing comes up. Can you tell me if I something missed to set in the code itself, or are there some sorts of constraints when drawing on Overlay canvases? Thanks

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• Find the "largest" dense sub matrix in a large sparse matrix

  - by BCS

  Given a large sparse matrix (say 10k+ by 1M+) I need to find a subset, not necessarily continuous, of the rows and columns that form a dense matrix (all non-zero elements). I want this sub matrix to be as large as possible (not the largest sum, but the largest number of elements) within some aspect ratio constraints. Are there any known exact or aproxamate solutions to this problem? A quick scan on Google seems to give a lot of close-but-not-exactly results. What terms should I be looking for? edit: Just to clarify; the sub matrix need not be continuous. In fact the row and column order is completely arbitrary so adjacency is completely irrelevant. A thought based on Chad Okere's idea Order the rows from largest count to smallest count (not necessary but might help perf) Select two rows that have a "large" overlap Add all other rows that won't reduce the overlap Record that set Add whatever row reduces the overlap by the least Repeat at #3 until the result gets to small Start over at #2 with a different starting pair Continue until you decide the result is good enough

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• Development Environment in a VM against an isolated development/test network

  - by bart

  I currently work in an organization that forces all software development to be done inside a VM. This is for a variety of risk/governance/security/compliance reasons. The standard setup is something like: VMWare image given to devs with tools installed VM is customized to suit project/stream needs VM sits in a network & domain that is isolated from the live/production network SCM connectivity is only possible through dev/test network Email and office tools need to be on live network so this means having two separate desktops going at once Heavyweight dev tools in use on VMs so they are very resource hungry Some problems that people complain about are: Development environment runs slower than normal (host OS is windows XP so memory is limited) Switching between DEV machine and Email/Office machine is a pain, simple things like cut and paste are made harder. This is less efficient from a usability perspective. Mouse in particular doesn't seem to work properly using VMWare player or RDP. Need a separate login to Dev/Test network/domain Has anyone seen or worked in other (hopefully better) setups to this that have similar constraints (as mentioned at the top)? In particular are there viable options that would remove the need for running stuff in a VM altogether?

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• How to best transfer large payloads of data using wsHttp with WCF with message security

  - by jpierson

  I have a case where I need to transfer large amounts of serialized object graphs (via NetDataContractSerializer) using WCF using wsHttp. I'm using message security and would like to continue to do so. Using this setup I would like to transfer serialized object graph which can sometimes approach around 300MB or so but when I try to do so I've started seeing a exception of type System.InsufficientMemoryException appear. After a little research it appears that by default in WCF that a result to a service call is contained within a single message by default which contains the serialized data and this data is buffered by default on the server until the whole message is completely written. Thus the memory exception is being caused by the fact that the server is running out of memory resources that it is allowed to allocate because that buffer is full. The two main recommendations that I've come across are to use streaming or chunking to solve this problem however it is not clear to me what that involves and whether either solution is possible with my current setup (wsHttp/NetDataContractSerializer/Message Security). So far I understand that to use streaming message security would not work because message encryption and decryption need to work on the whole set of data and not a partial message. Chunking however sounds like it might be possible however it is not clear to me how it would be done with the other constraints that I've listed. If anybody could offer some guidance on what solutions are available and how to go about implementing it I would greatly appreciate it. Related resources: Chunking Channel How to: Enable Streaming Large attachments over WCF Custom Message Encoder Another spotting of InsufficientMemoryException I'm also interested in any type of compression that could be done on this data but it looks like I would probably be best off doing this at the transport level once I can transition into .NET 4.0 so that the client will automatically support the gzip headers if I understand this properly.

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• [Linq to SQL] Multiple foreign keys to the same table

  - by cdonner

  I have a reference table with all sorts of controlled value lookup data for gender, address type, contact type, etc. Many tables have multiple foreign keys to this reference table I also have many-to-many association tables that have two foreign keys to the same table. Unfortunately, when these tables are pulled into a Linq model and the DBML is generated, SQLMetal does not look at the names of the foreign key columns, or the names of the constraints, but only at the target table. So I end up with members called Reference1, Reference2, ... not very maintenance-friendly. Example: <Association Name="tb_reference_tb_account" Member="tb_reference" <====== ThisKey="shipping_preference_type_id" OtherKey="id" Type="tb_reference" IsForeignKey="true" /> <Association Name="tb_reference_tb_account1" Member="tb_reference1" <====== ThisKey="status_type_id" OtherKey="id" Type="tb_reference" IsForeignKey="true" /> I can go into the DBML and manually change the member names, of course, but this would mean I can no longer round-trip my database schema. This is not an option at the current stage of the model, which is still evolving. Splitting the reference table into n individual tables is also not desirable. I can probably write a script that runs against the XML after each generation and replaces the member name with something derived from ThisKey (since I adhere to a naming convention for these types of keys). Has anybody found a better solution to this problem?

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• Seems doctrine listener is not fired

  - by Roel Veldhuizen

  Got a service which should be executed the moment an object is persisted. Though, I think the code looks like it should work, it doesn't. I configured the service like the following yml. services: bla_orm.listener: class: Bla\OrmBundle\EventListener\UserManager arguments: [@security.encoder_factory] tags: - { name: doctrine.event_listener, event: prePersist } The class: namespace Bla\OrmBundle\EventListener; use Doctrine\ORM\Event\LifecycleEventArgs; use Bla\OrmBundle\Entity\User; class UserManager { protected $encoderFactory; public function __construct(\Symfony\Component\Security\Core\Encoder\EncoderFactoryInterface $encoderFactory) { $this->encoderFactory = $encoderFactory; } public function prePersist(LifecycleEventArgs $args) { $entity = $args->getEntity(); if ($entity instanceof User) { $encoder = $this->encoderFactory ->getEncoder($entity); $entity->setSalt(rand(10000, 99999)); $password = $encoder->encodePassword($entity->getPassword(), $entity->getSalt()); $entity->setPassword($password); } } } Symfony version: Symfony version 2.3.3 - app/dev/debug Output of container:debug [container] Public services Service Id Scope Class Name annotation_reader container Doctrine\Common\Annotations\FileCacheReader assetic.asset_manager container Assetic\Factory\LazyAssetManager assetic.controller prototype Symfony\Bundle\AsseticBundle\Controller\AsseticController assetic.filter.cssrewrite container Assetic\Filter\CssRewriteFilter assetic.filter_manager container Symfony\Bundle\AsseticBundle\FilterManager assetic.request_listener container Symfony\Bundle\AsseticBundle\EventListener\RequestListener cache_clearer container Symfony\Component\HttpKernel\CacheClearer\ChainCacheClearer cache_warmer container Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerAggregate data_collector.request container Symfony\Component\HttpKernel\DataCollector\RequestDataCollector data_collector.router container Symfony\Bundle\FrameworkBundle\DataCollector\RouterDataCollector database_connection n/a alias for doctrine.dbal.default_connection debug.controller_resolver container Symfony\Component\HttpKernel\Controller\TraceableControllerResolver debug.deprecation_logger_listener container Symfony\Component\HttpKernel\EventListener\ErrorsLoggerListener debug.emergency_logger_listener container Symfony\Component\HttpKernel\EventListener\ErrorsLoggerListener debug.event_dispatcher container Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher debug.stopwatch container Symfony\Component\Stopwatch\Stopwatch debug.templating.engine.php container Symfony\Bundle\FrameworkBundle\Templating\TimedPhpEngine debug.templating.engine.twig n/a alias for templating doctrine container Doctrine\Bundle\DoctrineBundle\Registry doctrine.dbal.connection_factory container Doctrine\Bundle\DoctrineBundle\ConnectionFactory doctrine.dbal.default_connection container stdClass doctrine.orm.default_entity_manager container Doctrine\ORM\EntityManager doctrine.orm.default_manager_configurator container Doctrine\Bundle\DoctrineBundle\ManagerConfigurator doctrine.orm.entity_manager n/a alias for doctrine.orm.default_entity_manager doctrine.orm.validator.unique container Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntityValidator doctrine.orm.validator_initializer container Symfony\Bridge\Doctrine\Validator\DoctrineInitializer event_dispatcher container Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher file_locator container Symfony\Component\HttpKernel\Config\FileLocator filesystem container Symfony\Component\Filesystem\Filesystem form.csrf_provider container Symfony\Component\Form\Extension\Csrf\CsrfProvider\SessionCsrfProvider form.factory container Symfony\Component\Form\FormFactory form.registry container Symfony\Component\Form\FormRegistry form.resolved_type_factory container Symfony\Component\Form\ResolvedFormTypeFactory form.type.birthday container Symfony\Component\Form\Extension\Core\Type\BirthdayType form.type.button container Symfony\Component\Form\Extension\Core\Type\ButtonType form.type.checkbox container Symfony\Component\Form\Extension\Core\Type\CheckboxType form.type.choice container Symfony\Component\Form\Extension\Core\Type\ChoiceType form.type.collection container Symfony\Component\Form\Extension\Core\Type\CollectionType form.type.country container Symfony\Component\Form\Extension\Core\Type\CountryType form.type.currency container Symfony\Component\Form\Extension\Core\Type\CurrencyType form.type.date container Symfony\Component\Form\Extension\Core\Type\DateType form.type.datetime container Symfony\Component\Form\Extension\Core\Type\DateTimeType form.type.email container Symfony\Component\Form\Extension\Core\Type\EmailType form.type.entity container Symfony\Bridge\Doctrine\Form\Type\EntityType form.type.file container Symfony\Component\Form\Extension\Core\Type\FileType form.type.form container Symfony\Component\Form\Extension\Core\Type\FormType form.type.hidden container Symfony\Component\Form\Extension\Core\Type\HiddenType form.type.integer container Symfony\Component\Form\Extension\Core\Type\IntegerType form.type.language container Symfony\Component\Form\Extension\Core\Type\LanguageType form.type.locale container Symfony\Component\Form\Extension\Core\Type\LocaleType form.type.money container Symfony\Component\Form\Extension\Core\Type\MoneyType form.type.number container Symfony\Component\Form\Extension\Core\Type\NumberType form.type.password container Symfony\Component\Form\Extension\Core\Type\PasswordType form.type.percent container Symfony\Component\Form\Extension\Core\Type\PercentType form.type.radio container Symfony\Component\Form\Extension\Core\Type\RadioType form.type.repeated container Symfony\Component\Form\Extension\Core\Type\RepeatedType form.type.reset container Symfony\Component\Form\Extension\Core\Type\ResetType form.type.search container Symfony\Component\Form\Extension\Core\Type\SearchType form.type.submit container Symfony\Component\Form\Extension\Core\Type\SubmitType form.type.text container Symfony\Component\Form\Extension\Core\Type\TextType form.type.textarea container Symfony\Component\Form\Extension\Core\Type\TextareaType form.type.time container Symfony\Component\Form\Extension\Core\Type\TimeType form.type.timezone container Symfony\Component\Form\Extension\Core\Type\TimezoneType form.type.url container Symfony\Component\Form\Extension\Core\Type\UrlType form.type_extension.csrf container Symfony\Component\Form\Extension\Csrf\Type\FormTypeCsrfExtension form.type_extension.form.http_foundation container Symfony\Component\Form\Extension\HttpFoundation\Type\FormTypeHttpFoundationExtension form.type_extension.form.validator container Symfony\Component\Form\Extension\Validator\Type\FormTypeValidatorExtension form.type_extension.repeated.validator container Symfony\Component\Form\Extension\Validator\Type\RepeatedTypeValidatorExtension form.type_extension.submit.validator container Symfony\Component\Form\Extension\Validator\Type\SubmitTypeValidatorExtension form.type_guesser.doctrine container Symfony\Bridge\Doctrine\Form\DoctrineOrmTypeGuesser form.type_guesser.validator container Symfony\Component\Form\Extension\Validator\ValidatorTypeGuesser fragment.handler container Symfony\Component\HttpKernel\Fragment\FragmentHandler fragment.listener container Symfony\Component\HttpKernel\EventListener\FragmentListener fragment.renderer.hinclude container Symfony\Bundle\FrameworkBundle\Fragment\ContainerAwareHIncludeFragmentRenderer fragment.renderer.inline container Symfony\Component\HttpKernel\Fragment\InlineFragmentRenderer http_kernel container Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel kernel container locale_listener container Symfony\Component\HttpKernel\EventListener\LocaleListener logger container Symfony\Bridge\Monolog\Logger mailer n/a alias for swiftmailer.mailer.default monolog.handler.chromephp container Symfony\Bridge\Monolog\Handler\ChromePhpHandler monolog.handler.debug container Symfony\Bridge\Monolog\Handler\DebugHandler monolog.handler.firephp container Symfony\Bridge\Monolog\Handler\FirePHPHandler monolog.handler.main container Monolog\Handler\StreamHandler monolog.logger.deprecation container Symfony\Bridge\Monolog\Logger monolog.logger.doctrine container Symfony\Bridge\Monolog\Logger monolog.logger.emergency container Symfony\Bridge\Monolog\Logger monolog.logger.event container Symfony\Bridge\Monolog\Logger monolog.logger.profiler container Symfony\Bridge\Monolog\Logger monolog.logger.request container Symfony\Bridge\Monolog\Logger monolog.logger.router container Symfony\Bridge\Monolog\Logger monolog.logger.security container Symfony\Bridge\Monolog\Logger monolog.logger.templating container Symfony\Bridge\Monolog\Logger profiler container Symfony\Component\HttpKernel\Profiler\Profiler profiler_listener container Symfony\Component\HttpKernel\EventListener\ProfilerListener property_accessor container Symfony\Component\PropertyAccess\PropertyAccessor request request response_listener container Symfony\Component\HttpKernel\EventListener\ResponseListener router container Symfony\Bundle\FrameworkBundle\Routing\Router router_listener container Symfony\Component\HttpKernel\EventListener\RouterListener routing.loader container Symfony\Bundle\FrameworkBundle\Routing\DelegatingLoader security.context container Symfony\Component\Security\Core\SecurityContext security.encoder_factory container Symfony\Component\Security\Core\Encoder\EncoderFactory security.firewall container Symfony\Component\Security\Http\Firewall security.firewall.map.context.dev container Symfony\Bundle\SecurityBundle\Security\FirewallContext security.firewall.map.context.login container Symfony\Bundle\SecurityBundle\Security\FirewallContext security.firewall.map.context.rest container Symfony\Bundle\SecurityBundle\Security\FirewallContext security.firewall.map.context.secured_area container Symfony\Bundle\SecurityBundle\Security\FirewallContext security.rememberme.response_listener container Symfony\Component\Security\Http\RememberMe\ResponseListener security.secure_random container Symfony\Component\Security\Core\Util\SecureRandom security.validator.user_password container Symfony\Component\Security\Core\Validator\Constraints\UserPasswordValidator sensio.distribution.webconfigurator n/a alias for sensio_distribution.webconfigurator sensio_distribution.webconfigurator container Sensio\Bundle\DistributionBundle\Configurator\Configurator sensio_framework_extra.cache.listener container Sensio\Bundle\FrameworkExtraBundle\EventListener\CacheListener sensio_framework_extra.controller.listener container Sensio\Bundle\FrameworkExtraBundle\EventListener\ControllerListener sensio_framework_extra.converter.datetime container Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\DateTimeParamConverter sensio_framework_extra.converter.doctrine.orm container Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\DoctrineParamConverter sensio_framework_extra.converter.listener container Sensio\Bundle\FrameworkExtraBundle\EventListener\ParamConverterListener sensio_framework_extra.converter.manager container Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\ParamConverterManager sensio_framework_extra.view.guesser container Sensio\Bundle\FrameworkExtraBundle\Templating\TemplateGuesser sensio_framework_extra.view.listener container Sensio\Bundle\FrameworkExtraBundle\EventListener\TemplateListener service_container container session container Symfony\Component\HttpFoundation\Session\Session session.handler container Symfony\Component\HttpFoundation\Session\Storage\Handler\NativeFileSessionHandler session.storage n/a alias for session.storage.native session.storage.filesystem container Symfony\Component\HttpFoundation\Session\Storage\MockFileSessionStorage session.storage.native container Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage session.storage.php_bridge container Symfony\Component\HttpFoundation\Session\Storage\PhpBridgeSessionStorage session_listener container Symfony\Bundle\FrameworkBundle\EventListener\SessionListener streamed_response_listener container Symfony\Component\HttpKernel\EventListener\StreamedResponseListener swiftmailer.email_sender.listener container Symfony\Bundle\SwiftmailerBundle\EventListener\EmailSenderListener swiftmailer.mailer n/a alias for swiftmailer.mailer.default swiftmailer.mailer.default container Swift_Mailer swiftmailer.mailer.default.plugin.messagelogger container Swift_Plugins_MessageLogger swiftmailer.mailer.default.spool container Swift_FileSpool swiftmailer.mailer.default.transport container Swift_Transport_SpoolTransport swiftmailer.mailer.default.transport.real container Swift_Transport_EsmtpTransport swiftmailer.plugin.messagelogger n/a alias for swiftmailer.mailer.default.plugin.messagelogger swiftmailer.spool n/a alias for swiftmailer.mailer.default.spool swiftmailer.transport n/a alias for swiftmailer.mailer.default.transport swiftmailer.transport.real n/a alias for swiftmailer.mailer.default.transport.real templating container Symfony\Bundle\TwigBundle\Debug\TimedTwigEngine templating.asset.package_factory container Symfony\Bundle\FrameworkBundle\Templating\Asset\PackageFactory templating.filename_parser container Symfony\Bundle\FrameworkBundle\Templating\TemplateFilenameParser templating.globals container Symfony\Bundle\FrameworkBundle\Templating\GlobalVariables templating.helper.actions container Symfony\Bundle\FrameworkBundle\Templating\Helper\ActionsHelper templating.helper.assets request Symfony\Component\Templating\Helper\CoreAssetsHelper templating.helper.code container Symfony\Bundle\FrameworkBundle\Templating\Helper\CodeHelper templating.helper.form container Symfony\Bundle\FrameworkBundle\Templating\Helper\FormHelper templating.helper.logout_url container Symfony\Bundle\SecurityBundle\Templating\Helper\LogoutUrlHelper templating.helper.request container Symfony\Bundle\FrameworkBundle\Templating\Helper\RequestHelper templating.helper.router container Symfony\Bundle\FrameworkBundle\Templating\Helper\RouterHelper templating.helper.security container Symfony\Bundle\SecurityBundle\Templating\Helper\SecurityHelper templating.helper.session container Symfony\Bundle\FrameworkBundle\Templating\Helper\SessionHelper templating.helper.slots container Symfony\Component\Templating\Helper\SlotsHelper templating.helper.translator container Symfony\Bundle\FrameworkBundle\Templating\Helper\TranslatorHelper templating.loader container Symfony\Bundle\FrameworkBundle\Templating\Loader\FilesystemLoader templating.name_parser container Symfony\Bundle\FrameworkBundle\Templating\TemplateNameParser translation.dumper.csv container Symfony\Component\Translation\Dumper\CsvFileDumper translation.dumper.ini container Symfony\Component\Translation\Dumper\IniFileDumper translation.dumper.mo container Symfony\Component\Translation\Dumper\MoFileDumper translation.dumper.php container Symfony\Component\Translation\Dumper\PhpFileDumper translation.dumper.po container Symfony\Component\Translation\Dumper\PoFileDumper translation.dumper.qt container Symfony\Component\Translation\Dumper\QtFileDumper translation.dumper.res container Symfony\Component\Translation\Dumper\IcuResFileDumper translation.dumper.xliff container Symfony\Component\Translation\Dumper\XliffFileDumper translation.dumper.yml container Symfony\Component\Translation\Dumper\YamlFileDumper translation.extractor container Symfony\Component\Translation\Extractor\ChainExtractor translation.extractor.php container Symfony\Bundle\FrameworkBundle\Translation\PhpExtractor translation.loader container Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader translation.loader.csv container Symfony\Component\Translation\Loader\CsvFileLoader translation.loader.dat container Symfony\Component\Translation\Loader\IcuResFileLoader translation.loader.ini container Symfony\Component\Translation\Loader\IniFileLoader translation.loader.mo container Symfony\Component\Translation\Loader\MoFileLoader translation.loader.php container Symfony\Component\Translation\Loader\PhpFileLoader translation.loader.po container Symfony\Component\Translation\Loader\PoFileLoader translation.loader.qt container Symfony\Component\Translation\Loader\QtFileLoader translation.loader.res container Symfony\Component\Translation\Loader\IcuResFileLoader translation.loader.xliff container Symfony\Component\Translation\Loader\XliffFileLoader translation.loader.yml container Symfony\Component\Translation\Loader\YamlFileLoader translation.writer container Symfony\Component\Translation\Writer\TranslationWriter translator n/a alias for translator.default translator.default container Symfony\Bundle\FrameworkBundle\Translation\Translator twig container Twig_Environment twig.controller.exception container Symfony\Bundle\TwigBundle\Controller\ExceptionController twig.exception_listener container Symfony\Component\HttpKernel\EventListener\ExceptionListener twig.loader container Symfony\Bundle\TwigBundle\Loader\FilesystemLoader twig.translation.extractor container Symfony\Bridge\Twig\Translation\TwigExtractor uri_signer container Symfony\Component\HttpKernel\UriSigner bla_orm.listener container Bla\OrmBundle\EventListener\UserManager validator container Symfony\Component\Validator\Validator web_profiler.controller.exception container Symfony\Bundle\WebProfilerBundle\Controller\ExceptionController web_profiler.controller.profiler container Symfony\Bundle\WebProfilerBundle\Controller\ProfilerController web_profiler.controller.router container Symfony\Bundle\WebProfilerBundle\Controller\RouterController web_profiler.debug_toolbar container Symfony\Bundle\WebProfilerBundle\EventListener\WebDebugToolbarListener Update It seems that the listener is not invoked when an updateAction, generated by generate:doctrine:crud has taken place though. At another part of the code the lister seems to be invoked. Though, there are both Controller types and both us $em->persist($something); $em->flush(); to save the changes. I would expect that in both cases the listener is invoked.

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• How do you keep your business rules DRY?

  - by Mario

  I periodically ponder how to best design an application whose every business rule exists in just a single location. (While I know there is no proverbial “best way” and that designs are situational, people must have a leaning toward one practice or another.) I work for a shop where they prefer to house as much of the business rules as possible in the database. This requires developers in many cases to perform identical front-end validations to avoid sending data to the database that will result in an exception—not very DRY. It grates me anytime I find myself duplicating any kind of logic—even lowly validation logic. I am a single-point-of-truth purist to an anal degree. On the other end of the spectrum, I know of shops that create dumb databases (the Rails community leans in this direction) and handle all of the business logic in a separate tier (in Rails the models would house “most” of this). Note the word “most” which implies that some business logic does end up spilling into other places (in Rails it might spill over into the controllers). In way, a clean separation of concerns where all business logic exists in a single core location is a Utopian fantasy that’s hard to uphold (n-tiered architecture or not). Furthermore, is see the “Database as a fortress” and would agree that it should be built on constraints that cause it to reject bad data. As such, I hold principles that cause a degree of angst as I attempt to balance them. How do you balance the database-as-a-fortress view with the desire to have a single-point-of-truth?

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• How do I eliminate Error 3002?

  - by Andrew

  Say I have the following table definitions in SQL Server 2008: CREATE TABLE Person (PersonId INT IDENTITY NOT NULL PRIMARY KEY, Name VARCHAR(50) NOT NULL, ManyMoreIrrelevantColumns VARCHAR(MAX) NOT NULL) CREATE TABLE Model (ModelId INT IDENTITY NOT NULL PRIMARY KEY, ModelName VARCHAR(50) NOT NULL, Description VARCHAR(200) NULL) CREATE TABLE ModelScore (ModelId INT NOT NULL REFERENCES Model (ModelId), Score INT NOT NULL, Definition VARCHAR(100) NULL, PRIMARY KEY (ModelId, Score)) CREATE TABLE PersonModelScore (PersonId INT NOT NULL REFERENCES Person (PersonId), ModelId INT NOT NULL, Score INT NOT NULL, PRIMARY KEY (PersonId, ModelId), FOREIGN KEY (ModelId, Score) REFERENCES ModelScore (ModelId, Score)) The idea here is that each Person may have only one ModelScore per Model, but each Person may have a score for any number of defined Models. As far as I can tell, this SQL should enforce these constraints naturally. The ModelScore has a particular "meaning," which is contained in the Definition. Nothing earth-shattering there. Now, I try translating this into Entity Framework using the designer. After updating the model from the database and doing some editing, I have a Person object, a Model object, and a ModelScore object. PersonModelScore, being a join table, is not an object but rather is included as an association with some other name (let's say ModelScorePersonAssociation). The mapping details for the association are as follows: - Association - Maps to PersonModelScore - ModelScore ModelId : Int32 <=> ModelId : int Score : Int32 <=> Score : int - Person PersonId : Int32 <=> PersonId : int On the right-hand side, the ModelId and PersonId values have primary key symbols, but the Score value does not. Upon compilation, I get: Error 3002: Problem in Mapping Fragment starting at line 5190: Potential runtime violation of table PersonModelScore's keys (PersonModelScore.ModelId, PersonModelScore.PersonId): Columns (PersonModelScore.PersonId, PersonModelScore.ModelId) are mapped to EntitySet ModelScorePersonAssociation's properties (ModelScorePersonAssociation.Person.PersonId, ModelScorePersonAssociation.ModelScore.ModelId) on the conceptual side but they do not form the EntitySet's key properties (ModelScorePersonAssociation.ModelScore.ModelId, ModelScorePersonAssociation.ModelScore.Score, ModelScorePersonAssociation.Person.PersonId). What have I done wrong in the designer or otherwise, and how can I fix the error? Many thanks!

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• Glassfish4 throw exception when I declare validation.xml file on classpath

  - by Rafael Ruiz Tabares

  I've tried to declare a custom validator for @NotNull constraint and Glassfish4 throw this exception when find /META-INF/validation.xml. Project works fine if I omit this file. Exception while dispatching an event java.lang.IllegalStateException: Singleton not set for WebappClassLoader(delegate=true; repositories=WEB-INF/classes/) at org.glassfish.weld.ACLSingletonProvider$ACLSingleton.get(ACLSingletonProvider.java:110) at org.jboss.weld.Container.instance(Container.java:54) at org.jboss.weld.bootstrap.WeldBootstrap.shutdown(WeldBootstrap.java:644) at org.glassfish.weld.WeldDeployer.doBootstrapShutdown(WeldDeployer.java:309) at org.glassfish.weld.WeldDeployer.event(WeldDeployer.java:220) at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131) at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:328) at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:493) at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219) at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:527) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:523) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:356) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:522) at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:546) at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1423) at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1500(CommandRunnerImpl.java:108) at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1762) at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1674) at org.glassfish.admin.rest.resources.admin.CommandResource.executeCommand(CommandResource.java:396) at org.glassfish.admin.rest.resources.admin.CommandResource.execCommandSimpInMultOut(CommandResource.java:234) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:91) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:346) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:341) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101) at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:224) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946) at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:331) at org.glassfish.admin.rest.adapter.JerseyContainerCommandService$3.service(JerseyContainerCommandService.java:165) at org.glassfish.admin.rest.adapter.RestAdapter.service(RestAdapter.java:181) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:246) at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191) at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168) at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189) at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206) at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136) at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114) at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544) at java.lang.Thread.run(Thread.java:744) ]] [2014-06-09T19:37:52.476+0200] [glassfish 4.0] [SEVERE] [AS-WEB-CORE-00108] [javax.enterprise.web.core] [tid: _ThreadID=32 _ThreadName=admin-listener(1)] [timeMillis: 1402335472476] [levelValue: 1000] [[ ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.IllegalArgumentException: javax.servlet.ServletException: com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class: class org.jboss.weld.servlet.WeldListener at org.apache.catalina.core.StandardContext.start(StandardContext.java:5864) at com.sun.enterprise.web.WebModule.start(WebModule.java:691) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1041) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:1024) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:747) at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2278) at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1924) at com.sun.enterprise.web.WebApplication.start(WebApplication.java:139) at org.glassfish.internal.data.EngineRef.start(EngineRef.java:122) at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:291) at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:352) at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:497) at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219) at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:527) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:523) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:356) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:522) at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:546) at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1423) at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1500(CommandRunnerImpl.java:108) at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1762) at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1674) at org.glassfish.admin.rest.resources.admin.CommandResource.executeCommand(CommandResource.java:396) at org.glassfish.admin.rest.resources.admin.CommandResource.execCommandSimpInMultOut(CommandResource.java:234) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:91) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:346) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:341) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101) at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:224) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946) at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:331) at org.glassfish.admin.rest.adapter.JerseyContainerCommandService$3.service(JerseyContainerCommandService.java:165) at org.glassfish.admin.rest.adapter.RestAdapter.service(RestAdapter.java:181) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:246) at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191) at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168) at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189) at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206) at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136) at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114) at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544) at java.lang.Thread.run(Thread.java:744) Caused by: java.lang.IllegalArgumentException: javax.servlet.ServletException: com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class: class org.jboss.weld.servlet.WeldListener at org.apache.catalina.core.StandardContext.addListener(StandardContext.java:3270) at org.apache.catalina.core.StandardContext.addApplicationListener(StandardContext.java:2476) at com.sun.enterprise.web.TomcatDeploymentConfig.configureApplicationListener(TomcatDeploymentConfig.java:251) at com.sun.enterprise.web.TomcatDeploymentConfig.configureWebModule(TomcatDeploymentConfig.java:110) at com.sun.enterprise.web.WebModuleContextConfig.start(WebModuleContextConfig.java:266) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:486) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:163) at org.apache.catalina.core.StandardContext.start(StandardContext.java:5861) ... 66 more Caused by: javax.servlet.ServletException: com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class: class org.jboss.weld.servlet.WeldListener at org.apache.catalina.core.StandardContext.createListener(StandardContext.java:3391) at org.apache.catalina.core.StandardContext.loadListener(StandardContext.java:5414) at com.sun.enterprise.web.WebModule.loadListener(WebModule.java:1788) at org.apache.catalina.core.StandardContext.addListener(StandardContext.java:3268) ... 73 more Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class: class org.jboss.weld.servlet.WeldListener at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:329) at com.sun.enterprise.web.WebContainer.createListenerInstance(WebContainer.java:1015) at com.sun.enterprise.web.WebModule.createListenerInstance(WebModule.java:2158) at org.apache.catalina.core.StandardContext.createListener(StandardContext.java:3389) ... 76 more Caused by: java.lang.NullPointerException at org.jboss.weld.bootstrap.WeldBootstrap.getManager(WeldBootstrap.java:435) at org.glassfish.weld.services.JCDIServiceImpl.createManagedObject(JCDIServiceImpl.java:320) at org.glassfish.weld.services.JCDIServiceImpl.createManagedObject(JCDIServiceImpl.java:263) at com.sun.enterprise.container.common.impl.managedbean.ManagedBeanManagerImpl.createManagedBean(ManagedBeanManagerImpl.java:485) at com.sun.enterprise.container.common.impl.managedbean.ManagedBeanManagerImpl.createManagedBean(ManagedBeanManagerImpl.java:439) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:313) ... 79 more This is constraint xml file <constraint-definition annotation="org.hibernate.validator.constraints.NotNull"> <validated-by include-existing-validators="true"> <value>es.project.validator.customConstraint.NotEmptyValidator</value> </validated-by> </constraint-definition> And validation.xml <validation-config xmlns="http://jboss.org/xml/ns/javax/validation/configuration" xsi:schemaLocation="http://jboss.org/xml/ns/javax/validation/configuration validation-configuration-1.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <constraint-mapping>META-INF/validation/mapping.xml</constraint-mapping> Project's structure WEB-INF +----\classes +-------\META-INF ------- validation.xml ----------\validation +----------\mapping.xml Validator code import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext; import javax.validation.constraints.NotNull; import org.hibernate.validator.constraintvalidation.HibernateConstraintValidatorContext; public class NotEmptyValidator implements ConstraintValidator<NotNull,Object> { @Override public void initialize(NotNull constraintAnnotation) { } @Override public boolean isValid(Object value, ConstraintValidatorContext context) { if(value.toString().isEmpty()){ ........... ........... ........... } return true; } }

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• Don't Understand Sql Server Error

  - by Jonathan Wood

  I have a table of users (User), and need to create a new table to track which users have referred other users. So, basically, I'm creating a many-to-many relation between rows in the same table. So I'm trying to create table UserReferrals with the columns UserId and UserReferredId. I made both columns a compound primary key. And both columns are foreign keys that link to User.UserID. Since deleting a user should also delete the relationship, I set both foreign keys to cascade deletes. When the user is deleted, any related rows in UserReferrals should also delete. But this gives me the message: 'User' table saved successfully 'UserReferrals' table Unable to create relationship 'FK_UserReferrals_User'. Introducing FOREIGN KEY constraint 'FK_UserReferrals_User' on table 'UserReferrals' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints. Could not create constraint. See previous errors. I don't get this error. A cascading delete only deletes the row with the foreign key, right? So how can it cause "cycling cascade paths"? Thanks for any tips.

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