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  • Planning development when academic research is involved

    - by Another Anonymous User
    Dear fellow programmers, how do you do "software planning" when academic research is involved? And, on a side note, how do you convince your boss that writing software is not like building a house and it's more like writing a novel? The gory details are below. I am in charge of a small dev team working in a research lab. We started developing a software with the purpose of going public one day (i.e. sell and make money off that). Such software depends on, amongst other things, at least two independent research lines: that is, there are at least two Ph.D. candidates that will, hopefully, one day come out with a working implementation of what we need. The main software depends also on other, more concrete resources that we as developers can take care of: graphics rendering, soft bodies deformation, etc. My boss asked me to write the specifications, requirements AND a bloody GANTT chart of the entire project. Faced with the fact that I don't have a clue about the research part, and that such research is fundamental for the software, he said "make assumptions." For the clarity of the argument, he is a professor whose Ph.D. students should come up with the research we need. And he comes from a strictly engineering background: plan everything first, write down specifications and only then write down code that "it's the last part". What I am doing now: I broke down the product in features; each 'feature' is, de facto, a separate product; Each feature is built on top of the previous one; Once a feature (A) has a working prototype the team can start working on the next feature (B), while QA for is being done for A (if money allows, more people can be brought in, etc.); Features that depend on research will come last: by then, hopefully, the research part will be completed (when is still a big question) ; Also, I set the team to use SCRUM for the development of 'version 1.0', due in a few months. This deadline could be set based on reasonable assumptions: we listed all required features, we counted our availability, and we gave a reasonable estimate. So my questions, again, are: How do I make my boss happy while at the same time get something out the door? How do I write specifications for something we -the developers- have no clue whether it's possible to do or not? (We still haven't decided which libraries to use for some tasks; we'll do so when we'll need to) How do I get the requirements for that, given that there are yet no clients nor investors, just lots of interests and promises? How do I get peace in the world? I am sure at least one of my questions will be answered :) ps: I am writing this anonymously since a potential investor might backfire if this is discovered. Hope you'll understand. However I must say I do not like this mentality of 'hiding the truth': this program will likely benefit many, and not being able to talk openly about this (with my name and my reputation attached) feels like censorship. But alas, I care more about your suggestions now.

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  • Software and/(x)or Hardware Projects for Pre-School Kids

    - by haylem
    I offered to participate at my kid's pre-school for various activities (yes, I'm crazy like that), and one of them is to help them discover extra-curricular (big word for a pre-school, but by lack of a better one... :)) hobbies, which may or may not relate to a professional activity. At first I thought that it wouldn't be really easy to have pre-schoolers relate to programming or the internal workings of a computer system in general (and I'm more used to teaching middle-school to university-level students), but then I thought there must be a way. So I'm trying to figure out ways to introduce very young kids (3yo) to computer systems in a fun and preferably educational way. Of course, I don't expect them to start smashing the stack for fun and profit right away (or at least not voluntarily, though I could use the occasion for some toddler tests...), but I'm confident there must be ways to get them interested in both: using the systems, becoming curious about understanding what they do, interacting with the systems to modify them. I guess this setting is not really relevant after all, it's pretty much the same as if you were aiming to achieve the same for your own kids at home. Ideas Considering we're talking 3yo pre-schoolers here, and that at this age some kids are already quite confident using a mouse (some even a keyboard, if not for typing, at least to press some buttons they've come to associate with actions) while others have not yet had any interaction with computers of any kind, it needs to be: rather basic, demonstrated and played with in less then 5 or 10 minutes, doable in in groups or alone, scalable and extendable in complexity to accommodate their varying abilities. The obvious options are: basic smallish games to play with, interactive systems like LOGO, Kojo, Squeak and clones (possibly even simpler than that), or thngs like Lego Systems. I guess it can be a thing to reflect on both at the software and the hardware levels: it could be done with a desktop or laptop machine, a tablet, a smartphone (or a crap-phone, for that matter, as long as you can modify it), or even get down to building something from scratch (Raspberry Pi and Arduino being popular options at the moment). I can probably be in the form of games, funny visualizations (which are pretty much games) w/ Prototype, virtual worlds to explore. I also thought on the moment (and I hope this won't offend anyone) that some approaches to teaching pets could work (reward systems, haptic feedback and such things could quickly point a kid in the right direction to understanding how things work, in a similar fashion - I'm not suggesting to shock the kids!). Hmm, Is There an Actual Question in There? What type of systems do you think might be a good fit, both in terms of hardware and software? Do you have seen such systems, or have anything in mind to work on? Are you aware of some research in this domain, with tangible results? Any input is welcome. It's not that I don't see options: there are tons, but I have a harder time pinpointing a more concrete and definite type of project/activity, so I figure some have valuable ideas or existing ones. Note: I am not advocating that every kid should learn to program, be interested in computer systems, or that all of them in a class would even care enough to follow such an introduction with more than a blank stare. I don't buy into the "everybody would benefit from learning to program" thing. Wouldn't hurt, but not necessary in any way. But if I can walk out of there with a few of them having smiled using the thing (or heck, cried because others took them away from them), that'd be good enough. Related Questions I've seen and that seem to complement what I'm looking for, but not exactly for the same age groups or with the same goals: Teaching Programming to Kids Recommendations for teaching kids math concepts & skills for programming?

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  • Using WKA in Large Coherence Clusters (Disabling Multicast)

    - by jpurdy
    Disabling hardware multicast (by configuring well-known addresses aka WKA) will place significant stress on the network. For messages that must be sent to multiple servers, rather than having a server send a single packet to the switch and having the switch broadcast that packet to the rest of the cluster, the server must send a packet to each of the other servers. While hardware varies significantly, consider that a server with a single gigabit connection can send at most ~70,000 packets per second. To continue with some concrete numbers, in a cluster with 500 members, that means that each server can send at most 140 cluster-wide messages per second. And if there are 10 cluster members on each physical machine, that number shrinks to 14 cluster-wide messages per second (or with only mild hyperbole, roughly zero). It is also important to keep in mind that network I/O is not only expensive in terms of the network itself, but also the consumption of CPU required to send (or receive) a message (due to things like copying the packet bytes, processing a interrupt, etc). Fortunately, Coherence is designed to rely primarily on point-to-point messages, but there are some features that are inherently one-to-many: Announcing the arrival or departure of a member Updating partition assignment maps across the cluster Creating or destroying a NamedCache Invalidating a cache entry from a large number of client-side near caches Distributing a filter-based request across the full set of cache servers (e.g. queries, aggregators and entry processors) Invoking clear() on a NamedCache The first few of these are operations that are primarily routed through a single senior member, and also occur infrequently, so they usually are not a primary consideration. There are cases, however, where the load from introducing new members can be substantial (to the point of destabilizing the cluster). Consider the case where cluster in the first paragraph grows from 500 members to 1000 members (holding the number of physical machines constant). During this period, there will be 500 new member introductions, each of which may consist of several cluster-wide operations (for the cluster membership itself as well as the partitioned cache services, replicated cache services, invocation services, management services, etc). Note that all of these introductions will route through that one senior member, which is sharing its network bandwidth with several other members (which will be communicating to a lesser degree with other members throughout this process). While each service may have a distinct senior member, there's a good chance during initial startup that a single member will be the senior for all services (if those services start on the senior before the second member joins the cluster). It's obvious that this could cause CPU and/or network starvation. In the current release of Coherence (3.7.1.3 as of this writing), the pure unicast code path also has less sophisticated flow-control for cluster-wide messages (compared to the multicast-enabled code path), which may also result in significant heap consumption on the senior member's JVM (from the message backlog). This is almost never a problem in practice, but with sufficient CPU or network starvation, it could become critical. For the non-operational concerns (near caches, queries, etc), the application itself will determine how much load is placed on the cluster. Applications intended for deployment in a pure unicast environment should be careful to avoid excessive dependence on these features. Even in an environment with multicast support, these operations may scale poorly since even with a constant request rate, the underlying workload will increase at roughly the same rate as the underlying resources are added. Unless there is an infrastructural requirement to the contrary, multicast should be enabled. If it can't be enabled, care should be taken to ensure the added overhead doesn't lead to performance or stability issues. This is particularly crucial in large clusters.

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  • Branding Support for TopComponents

    - by Geertjan
    In yesterday's blog entry, you saw how a menu item can be created, in this case with the label "Brand", especially for Java classes that extend TopComponent: And, as you can see here, it's not about the name of the class, i.e., not because the class above is named "BlaTopComponent" because below the "Brand" men item is also available for the class named "Bla": Both the files BlaTopComponent.java and Bla.java have the "Brand" menu item available, because both extend the "org.openide.windows.TopComponent"  class, as shown yesterday. Now we continue by creating a new JPanel, with checkboxes for each part of a TopComponent that we consider to be brandable. In my case, this is the end result, at deployment, when the Brand menu item is clicked for the Bla class: When the user (who, in this case, is a developer) clicks OK, a constructor is created and the related client properties are added, depending on which of the checkboxes are clicked: public Bla() {     putClientProperty(TopComponent.PROP_SLIDING_DISABLED, false);     putClientProperty(TopComponent.PROP_UNDOCKING_DISABLED, true);     putClientProperty(TopComponent.PROP_MAXIMIZATION_DISABLED, false);     putClientProperty(TopComponent.PROP_CLOSING_DISABLED, true);     putClientProperty(TopComponent.PROP_DRAGGING_DISABLED, false); } At this point, no check is done to see whether a constructor already exists, nor whether the client properties are already available. That's for an upcoming blog entry! Right now, the constructor is always created, regardless of whether it already exists, and the client properties are always added. The key to all this is the 'actionPeformed' of the TopComponent, which was left empty yesterday. We start by creating a JDialog from the JPanel and we retrieve the selected state of the checkboxes defined in the JPanel: @Override public void actionPerformed(ActionEvent ev) {     String msg = dobj.getName() + " Branding";     final BrandTopComponentPanel brandTopComponentPanel = new BrandTopComponentPanel();     dd = new DialogDescriptor(brandTopComponentPanel, msg, true, new ActionListener() {         @Override         public void actionPerformed(ActionEvent e) {             Object result = dd.getValue();             if (DialogDescriptor.OK_OPTION == result) {                 isClosing = brandTopComponentPanel.getClosingCheckBox().isSelected();                 isDragging = brandTopComponentPanel.getDraggingCheckBox().isSelected();                 isMaximization = brandTopComponentPanel.getMaximizationCheckBox().isSelected();                 isSliding = brandTopComponentPanel.getSlidingCheckBox().isSelected();                 isUndocking = brandTopComponentPanel.getUndockingCheckBox().isSelected();                 JavaSource javaSource = JavaSource.forFileObject(dobj.getPrimaryFile());                 try {                     javaSource.runUserActionTask(new ScanTask(javaSource), true);                 } catch (IOException ex) {                     Exceptions.printStackTrace(ex);                 }             }         }     });     DialogDisplayer.getDefault().createDialog(dd).setVisible(true); } Then we start a scan process, which introduces the branding. We're already doing a scan process for identifying whether a class is a TopComponent. So, let's combine those two scans, branching out based on which one we're doing: private class ScanTask implements Task<CompilationController> {     private BrandTopComponentAction action = null;     private JavaSource js = null;     private ScanTask(JavaSource js) {         this.js = js;     }     private ScanTask(BrandTopComponentAction action) {         this.action = action;     }     @Override     public void run(final CompilationController info) throws Exception {         info.toPhase(Phase.ELEMENTS_RESOLVED);         if (action != null) {             new EnableIfTopComponentScanner(info, action).scan(                     info.getCompilationUnit(), null);         } else {             introduceBranding();         }     }     private void introduceBranding() throws IOException {         CancellableTask task = new CancellableTask<WorkingCopy>() {             @Override             public void run(WorkingCopy workingCopy) throws IOException {                 workingCopy.toPhase(Phase.RESOLVED);                 CompilationUnitTree cut = workingCopy.getCompilationUnit();                 TreeMaker treeMaker = workingCopy.getTreeMaker();                 for (Tree typeDecl : cut.getTypeDecls()) {                     if (Tree.Kind.CLASS == typeDecl.getKind()) {                         ClassTree clazz = (ClassTree) typeDecl;                         ModifiersTree methodModifiers = treeMaker.Modifiers(Collections.<Modifier>singleton(Modifier.PUBLIC));                         MethodTree newMethod =                                 treeMaker.Method(methodModifiers,                                 "<init>",                                 treeMaker.PrimitiveType(TypeKind.VOID),                                 Collections.<TypeParameterTree>emptyList(),                                 Collections.EMPTY_LIST,                                 Collections.<ExpressionTree>emptyList(),                                 "{ putClientProperty(TopComponent.PROP_SLIDING_DISABLED, " + isSliding + ");\n"+                                 "  putClientProperty(TopComponent.PROP_UNDOCKING_DISABLED, " + isUndocking + ");\n"+                                 "  putClientProperty(TopComponent.PROP_MAXIMIZATION_DISABLED, " + isMaximization + ");\n"+                                 "  putClientProperty(TopComponent.PROP_CLOSING_DISABLED, " + isClosing + ");\n"+                                 "  putClientProperty(TopComponent.PROP_DRAGGING_DISABLED, " + isDragging + "); }\n",                                 null);                         ClassTree modifiedClazz = treeMaker.addClassMember(clazz, newMethod);                         workingCopy.rewrite(clazz, modifiedClazz);                     }                 }             }             @Override             public void cancel() {             }         };         ModificationResult result = js.runModificationTask(task);         result.commit();     } } private static class EnableIfTopComponentScanner extends TreePathScanner<Void, Void> {     private CompilationInfo info;     private final AbstractAction action;     public EnableIfTopComponentScanner(CompilationInfo info, AbstractAction action) {         this.info = info;         this.action = action;     }     @Override     public Void visitClass(ClassTree t, Void v) {         Element el = info.getTrees().getElement(getCurrentPath());         if (el != null) {             TypeElement te = (TypeElement) el;             if (te.getSuperclass().toString().equals("org.openide.windows.TopComponent")) {                 action.setEnabled(true);             } else {                 action.setEnabled(false);             }         }         return null;     } }

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  • Writing a method to 'transform' an immutable object: how should I approach this?

    - by Prog
    (While this question has to do with a concrete coding dilemma, it's mostly about what's the best way to design a function.) I'm writing a method that should take two Color objects, and gradually transform the first Color into the second one, creating an animation. The method will be in a utility class. My problem is that Color is an immutable object. That means that I can't do color.setRGB or color.setBlue inside a loop in the method. What I can do, is instantiate a new Color and return it from the method. But then I won't be able to gradually change the color. So I thought of three possible solutions: 1- The client code includes the method call inside a loop. For example: int duration = 1500; // duration of the animation in milliseconds int steps = 20; // how many 'cycles' the animation will take for(int i=0; i<steps; i++) color = transformColor(color, targetColor, duration, steps); And the method would look like this: Color transformColor(Color original, Color target, int duration, int steps){ int redDiff = target.getRed() - original.getRed(); int redAddition = redDiff / steps; int newRed = original.getRed() + redAddition; // same for green and blue .. Thread.sleep(duration / STEPS); // exception handling omitted return new Color(newRed, newGreen, newBlue); } The disadvantage of this approach is that the client code has to "do part of the method's job" and include a for loop. The method doesn't do it's work entirely on it's own, which I don't like. 2- Make a mutable Color subclass with methods such as setRed, and pass objects of this class into transformColor. Then it could look something like this: void transformColor(MutableColor original, Color target, int duration){ final int STEPS = 20; int redDiff = target.getRed() - original.getRed(); int redAddition = redDiff / steps; int newRed = original.getRed() + redAddition; // same for green and blue .. for(int i=0; i<STEPS; i++){ original.setRed(original.getRed() + redAddition); // same for green and blue .. Thread.sleep(duration / STEPS); // exception handling omitted } } Then the calling code would usually look something like this: // The method will usually transform colors of JComponents JComponent someComponent = ... ; // setting the Color in JComponent to be a MutableColor Color mutableColor = new MutableColor(someComponent.getForeground()); someComponent.setForeground(mutableColor); // later, transforming the Color in the JComponent transformColor((MutableColor)someComponent.getForeground(), new Color(200,100,150), 2000); The disadvantage is - the need to create a new class MutableColor, and also the need to do casting. 3- Pass into the method the actual mutable object that holds the color. Then the method could do object.setColor or similar every iteration of the loop. Two disadvantages: A- Not so elegant. Passing in the object that holds the color just to transform the color feels unnatural. B- While most of the time this method will be used to transform colors inside JComponent objects, other kinds of objects may have colors too. So the method would need to be overloaded to receive other types, or receive Objects and have instanceof checks inside.. Not optimal. Right now I think I like solution #2 the most, than solution #1 and solution #3 the least. However I'd like to hear your opinions and suggestions regarding this.

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  • How can I Setup overloaded method invocations in Moq?

    - by arootbeer
    I'm trying to mock a mapping interface IMapper: public interface IMapper<TFoo, TBar> { TBar Map(TFoo foo); TFoo Map(TBar bar); } In my test, I'm setting the mock mapper up to expect an invocation of each (around an NHibernate update operation): //... _mapperMock.Setup(m => m.Map(fooMock.Object)).Returns(barMock.Object); _mapperMock.Setup(m => m.Map(barMock.Object)).Returns(fooMock.Object); //... However, when the second Map invocation is made, the mapper mock throws because it is only expecting a single invocation. Watching the mapper mock during setup at runtime, I can look see the Map(TFoo foo) overload get registered, and then see it get replaced when the Map(TBar bar) overload is set up. Is this a problem with the way Moq handles setup, or is there a different syntax I need to use in this case?

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  • How to dock CPaneDialog to MainFrm and.. ?

    - by JongAm Park
    Hello, I have problem with CPaneDialog. I tested with SetPaneSize MFC feature pack sample projects. What is weird is that CPaneDialog can't be docked to MainFrm while CDockablePane can be. The CPaneDialog is also a child class of the CDockablePane, but it can't be. Only DockToWindow( &other_CPaneDialog_instance... ) is possible. If I call DockToPane(), the content of the CPaneDialog is not drawn or refreshed correctly. How can a CPaneDialog be docked to MainFrm window? Another problem is about drawing. If remove codes for tree control in the SetPaneSize sample, the content of the view1 ( an instance of CDockablePane) is not redrawn properly. After doing some experiment, I decided that something should be done in its OnSize and OnPaint method. (OnSize is more critical. ) Is this expected behaviour?

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  • PetStore 2.0 - java.lang.RuntimeException: javax.naming.NamingException: Lookup failed for 'jdbc/Pet

    - by Harry Pham
    I download PetStore 2.0 from https://blueprints.dev.java.net/servlets/ProjectDocumentList?folderID=5315&expandFolder=5315&folderID=0. I tried to build them in netbean 6.8 and I got this error SEVERE: Exception while preparing the app java.lang.RuntimeException: javax.naming.NamingException: Lookup failed for 'jdbc/PetstoreDB' in SerialContext [Root exception is javax.naming.NameNotFoundException: PetstoreDB not found] Seems like it cant find 'jdbc/PetStoreDB'. So I went back to the website and it look like I have to build the database via Ant script. So at the PetStore home directory, I run this command ant setup ant run And I got the same error when I try ant run [exec] Deprecated syntax, instead use: [exec] asadmin --port 4848 --host localhost --passwordfile /Users/KingdomHeart/.asadminpass --user admin deploy [options] ... [exec] com.sun.enterprise.admin.cli.CommandException: remote failure: Exception while preparing the app : java.lang.RuntimeException: javax.naming.NamingException: Lookup failed for 'jdbc/PetstoreDB' in SerialContext [Root exception is javax.naming.NameNotFoundException: PetstoreDB not found] [exec] [exec] [exec] Command deploy failed. Any idea what happen?

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  • Jquery JQGrid trigger reloadGrid

    - by JK
    I'm using a jqgrid to display the results of a search. When the search button is clicked it does this: $("#Search").jqGrid('setGridParam', { url: url }).trigger("reloadGrid"); Where url contains the search params eg: var url ="/search?first=joe&last=smith" The web server is receiving this url and responding appropriately. But on the client side it throws this error in jqgrid.min.js line 21: Syntax error: }); b.fn.jqGrid = function(f) { What can I do to fix this? I'm using jqgrid sucessfully in many other places, but this is the only one where I'm changing the url and reloading.

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  • jsTree: async loading

    - by vandalo
    Hello everyone, I am trying to use this jQuery plugin (jsTree) in one of my project. All the others I've found haven't been recently updated. Anyway, I am using this plugin to load a folder structure, but I would like to do this operation async. The examples I've found on their site (called async) are ridiculous. I've tried to check on the Internet but it seems that most people load the whole tree. I would like to load a branch on every single node click. I am using JSON. Thank in advance

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  • WPF Treeview contextmenu IsChecked binding MVVM

    - by BrettRobi
    I've got a TreeView to which I associate a ContextMenu. That contextmenu has an item whose IsChecked property I want to bind to my ViewModel. Since I am using a tree each treeitem is bound to a subproperty of my ViewModel. In the VS2010 output window I am seeing this databinding error: BindingExpression path error: 'IsAutoStart' property not found on 'object' ''HostMgmtViewModel' (HashCode=12565727)'. BindingExpression:Path=IsAutoStart; DataItem='HostMgmtViewModel' This clearly shows it is trying to bind to my ViewModel and not to the treeitem's associated data. How do I bind to the correct object? Remember my contextmenu is associated with the whole TreeView not to the specific treeitem.

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  • MSBuild target _CopyWebApplication does not copy all necessary files to the bin folder

    - by apollodude217
    Elsewhere on the Web, you can find recommendations on using something like this to simulate the Publish feature in the VS 2005-2008 IDE from a command-line (I hope I did not goof up the syntax!): msbuild /t:ResolveReferences;_CopyWebApplication /p:BuildingProject=true;OutDir=C:\inetpub\wwwroot\ blah.csproj Now, it looks like the .dll's copy fine. However, there are certain configuration files and template files that are copied to the bin folder which are needed for the app to work. For example, an NHibernate configuration file shows up in blah.csproj as: <None Include="blah.cfg.xml"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </None> While using Publish from within the IDE copies this file as it should, the aforementioned _CopyWebApplication target does not. I need this file to be copied in the build script. Is this desired behavior for _CopyWebApplication? Any recommendations on how to fix this?

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  • TVirtualStringTree compatibility between Delphi 7 and Delphi 2010 - 'Parameter lists differ'

    - by Brian Frost
    Hi, I've made a form containing a TVirtualStringTree that works in Delphi 7 and Delphi 2010. I notice that as I move between the two platforms I get the message '...parameter list differ..' on the tree events and that the string type is changing bewteen TWideString (D7) and string (D2010). The only trick I've found to work to suppress this error is to use compiler directives as follows: {$IFDEF TargetDelphi7} procedure VirtualStringTree1GetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: WideString); {$ELSE} procedure VirtualStringTree1GetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: string); {$ENDIF} and to repeat this where the events are implemented. Am I missing a simple solution? Thanks.

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  • WPF: Filter TreeView without collapsing it's nodes

    - by Julian Lettner
    This one is a follow-up question. I filter the top level nodes of a TreeView control like shown below. private void ApplyFilterHandler(object sender, RoutedEventArgs e) { if (_filterCheckBox.IsChecked.Value) CollectionViewSource.GetDefaultView(TopLevelNodes).Filter += MyFilter; else CollectionViewSource.GetDefaultView(TopLevelNodes).Filter -= MyFilter; } . <TreeView ItemsSource="{Binding TopLevelNodes}"> ... </TreeView> When the user applies the filter all nodes get collapsed. Question How can I hide certain nodes in a tree while retaining the expand state of the other nodes? Can someone explain, what happens internally on ICollectionView.Filter += MyFilter. Thanks for your time.

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  • Nhibernate upgraded getting 'Antlr.Runtime.NoViableAltException' on outer join using *=

    - by user86431
    so we upgraded to newer Nhibernate and Fluent Nhibernate. now I' getting this exception: FailedNHibernate.Hql.Ast.ANTLR.QuerySyntaxException: Exception of type 'Antlr.Runtime.NoViableAltException' was thrown. near line 1, column 459 On this hql, which worked fine before the upgrade. SELECT s.StudId, s.StudLname, s.StudFname, s.StudMi, s.Ssn, s.Sex, s.Dob, et.EnrtypeId, et.Active, et.EnrId, sss.StaffLname, sss.StaffFname, sss.StaffMi,vas.CurrentAge FROM CIS3G.Jcdc.EO.StudentEO s , CIS3G.Jcdc.EO.EnrollmentEO e , CIS3G.Jcdc.EO.EnrollmentTypeEO et , CIS3G.Jcdc.EO.VwStaffStudentStaffEO sss, CIS3G.Jcdc.EO.VwAgeStudentEO vas WHERE ( e.EnrId = et.EnrId ) AND ( s.StudId = vas.StudId ) AND ( s.StudId = e.StudId ) AND ( et.EnrtypeId *= sss.EnrtypeId ) AND ( Isnull ( sss.StudStaffRoleCd , 1044 ) = 1044 ) AND ( s.StudId = 4000 ) Clearly it does nto like the *= syntax, I tried rewritign is as ansi sql outer join and no joy. Can anyone tell me what ineed to change the sql to so I can get the outer join to work correctly? Thanks, Eric-

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  • MVC repository pattern design decision

    - by bradjive
    I have an asp .net MVC application and recently started implementing the repository pattern with a service validation layer, much like this. I've been creating one repository/service for each model that I create. Is this overkill? Instead, should I create one repository/service for each logical business area that provides CRUD for many different models? To me, it seems like I'm either cluttering the project tree with many files or cluttering a class with many methods. 6 one way half dozen the other. Can you think of any good arguments either way?

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  • How to use Winmerge with Git Extensions?

    - by sebastiaan
    I'm using Git Extensions and it pre-installs and sets up KDiff as the diff tool to solve merge conflicts. I'm very fond of Winmerge though and would like to replace KDiff with Winmerge. In the Git Extensions settings, there are settings to change the Mergetool, but I can't seem to figure out what syntax I should use and why. There seem to be 4 variables: $BASE, $LOCAL, $REMOTE, $MERGED. It seems that I should pass these to WinMergeU.exe, but with which command line parameters? I've tried to search for this a few times, but there is no answer that actually seems to work.

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  • Host a IWpfTextView in a custom tool for a Visual Studio Extension

    - by Adam Driscoll
    I'm trying to create a IWpfTextView and then put it into a custom tool window. I can create the view, read a file to populate the ITextBuffer and display the view into my tool. I cannot edit the code at all and the code is not syntax highlighted. What steps am I missing to make this a full fledged editor? Code: IComponentModel componentModel = (IComponentModel)GetGlobalService (typeof(SComponentModel)); var _textEditorFactoryService = componentModel.GetService<ITextEditorFactoryService>(); var _textBufferFactoryService = componentModel.GetService<ITextBufferFactoryService>(); var _contentTypeRegistryService = componentModel.GetService<IContentTypeRegistryService>(); TextReader reader = new StreamReader(fileName); var types = _contentTypeRegistryService.GetContentType("CSharp"); ITextBuffer textBuffer = _textBufferFactoryService.CreateTextBuffer(reader, types); var view = _textEditorFactoryService.CreateTextView(textBuffer); IWpfTextViewHost editor = _textEditorFactoryService.CreateTextViewHost(view, true);

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  • GWT layout panels vs. CSS layout

    - by David
    I read an article entitled "Tags First GWT", in which the writer suggests using GWT for event-handling, and CSS for layout. I just don't know whether the benefit of GWT's cross-browser compatibility goodness outweighs the flexibility offered by pure CSS layout. GWT GWT 2.0 has some snazzy layout panels, but to get them to resize properly you really need to build the entire panel containment tree from the root panel down. It's an all-or-nothing thing, it seems. CSS You can use CSS to layout an application too, and I'm inclined to do just that, if only to justify my purchase of several books touting the 'semantic markup' gospel. The downside might be cross-browser incompatibilities, the prevalence of which I have yet to determine. Which way to go? What is your opinion? Are cross-browser problems bad enough, and prevalent enough, to warrant ditching my CSS books, and building with GWT layout panels?

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  • RIA Services vs ADO.NET Data Services

    - by Cody C
    I'm currently in the process of creating a Silverlight 3 data driven application. To access the database, 2 common approaches are used: RIA Services and ADO.NET Data Services. Does anyone have any guidance on when/why to choose each approach? Here is what I've gathered from my research / experience. Any thoughts? ADO.NET seems to be only useful for strictly database calls. If you need to expose the data services to other applications (ignoring Silverlight 3's domain restriction), this is a good approach. Also, if the URL/Query syntax can be useful in your application, this is another advantage RIA Services seem to be a more flexible, accepted framework. It seems to give you more than strictly database access. It does have a limitation of only being used for the Silverlight / Web application as it is not exposed via a service. Thoughts? Ideas? Comments?

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  • android memory management outside heap

    - by Daniel Benedykt
    Hi I am working on an application for android and we since we have lots of graphics, we use a lot of memory. I monitor the memory heap size and its about 3-4 Mb , and peeks of 5Mb when I do something that requires more memory (and then goes back to 3). This is not a big deal, but some other stuff is handled outside the heap memory, like loading of drawables. For example if I run the ddms tool outside eclipse, and go to sysinfo, I see that my app is taking 20Mb on the Droid and 12 on the G1, but heap size are the same in both, because data is the same but images are different. So the questions are: How do I know what is taking the memory outside the heap memory? What other stuff takes memory outside the heap memory? Complex layouts (big tree) ? Animations? Thanks Daniel

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  • Populating Tcl Treeview with Sqlite Data

    - by DFM
    Hello: I am building a Tcl application that reads off of a Sqlite Db. Currently, I can enter data into the database using the Tcl frontend. Now, I am trying to figure out how to display the data within the Sqlite Db from the Tcl frontend. After a little bit of research, I found that the treeview widget would work well for my needs. I now have the following code: set z1 [ttk::treeview .c1.t1 -columns {1 2} -show headings] $z1 heading #1 -text "First Name" $z1 heading #2 -text "Last Name" proc Srch {} {global z1 sqlite3 db test.db pack $z1 db close } When the "Srch" procedure is executed (button event), the treeview (z1) appears with the headings First Name and Last Name. Additionally, the Sqlite Db gets connected, then closes. I wanted to add code that would populate the treeview from the Sqlite Db between connecting to the Db and packing the treeview (z1). Does anyone know the correct syntax to populate a Tcl treeview with data from Sqlite? Thank you everyone in advance, DFM

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  • Hierarchical templating multiple object types in silverlight

    - by Dan Wray
    Is it possible and if so what is the best way to implement the following hierarchical structure in a silverlight (4) TreeView control? (where Item and Group are classes which can exist in the tree). Group | |-Item | |-Group | | | |-Item | | | |-Item | |-Item The structure could of course be arbitrarily more complex than this, if needed. HierarchicalDataTemplates appear to be the way to approach this, but I'm specifically having trouble understanding how I might apply the template to interpret the different classes correctly. A similar question was asked for WPF, the answer for which made use of the TargetType property on the HierarchicalDataTemplate, but I am uncertain whether that property is available in the silverlight version since I don't appear to have access to it in my environment.

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  • <?xml version=“1.0” encoding=“UTF-8”?> not <?xml version='1.0' encoding='UTF-8'?>

    - by user2446702
    I am using lxml with tree.write(xmlFileOut, pretty_print = True, xml_declaration = True, encoding='UTF-8' to write out my opened and edited xml file, but I absolutely need to have the xml declaration as <?xml version=“1.0” encoding=“UTF-8”?> and NOT <?xml version='1.0' encoding='UTF-8'?> Now I know they are exactly the same when it comes to xml, but I am dealing with a very tricky customer who absolutely has to have " in the declaration and not '. I have searched everywhere but can't find the answer. Could I create it and add it in myself to the head of the xml somehow? Could I tell lxml that this is what I need as an xml declaration?

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  • Play Framework: Error getting sequence nextval using H2 in-memory database

    - by alexhanschke
    As the title suggests, I get an error running Play 2.0.1 Tests using a FakeApplication w/ H2 in memory. I set up a basic unit test: public class ModelTest { @Test public void checkThatIndustriesExist() { running(fakeApplication(inMemoryDatabase()), new Runnable() { public void run() { Industry industry = new Industry(); industry.name = "Some name"; industry.shortname = "some-name"; industry.save(); assertThat(Industry.find.all()).hasSize(1); } }); } Which yields the following exception: [info] test.ModelTest [error] Test test.ModelTest.checkThatIndustriesExist failed: Error getting sequence nextval [error] at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.getMoreIds(SequenceIdGenerator.java:213) [error] at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.loadMoreIds(SequenceIdGenerator.java:163) [error] at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.nextId(SequenceIdGenerator.java:118) [error] at com.avaje.ebeaninternal.server.deploy.BeanDescriptor.nextId(BeanDescriptor.java:1218) [error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.setIdGenValue(DefaultPersister.java:1304) [error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.insert(DefaultPersister.java:403) [error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveEnhanced(DefaultPersister.java:345) [error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveRecurse(DefaultPersister.java:315) [error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.save(DefaultPersister.java:282) [error] at com.avaje.ebeaninternal.server.core.DefaultServer.save(DefaultServer.java:1577) [error] at com.avaje.ebeaninternal.server.core.DefaultServer.save(DefaultServer.java:1567) [error] at com.avaje.ebean.Ebean.save(Ebean.java:538) [error] at play.db.ebean.Model.save(Model.java:76) [error] at test.ModelTest$1.run(ModelTest.java:24) [error] at play.test.Helpers.running(Helpers.java:277) [error] at test.ModelTest.checkThatIndustriesExist(ModelTest.java:21) [error] ... [error] Caused by: org.h2.jdbc.JdbcSQLException: Syntax Fehler in SQL Befehl "SELECT INDUSTRY_SEQ.NEXTVAL UNION[*] SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL "; erwartet "identifier" [error] Syntax error in SQL statement "SELECT INDUSTRY_SEQ.NEXTVAL UNION[*] SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL UNION SELECT INDUSTRY_SEQ.NEXTVAL "; expected "identifier"; SQL statement: [error] select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval union select industry_seq.nextval [42001-158] [error] at org.h2.message.DbException.getJdbcSQLException(DbException.java:329) [error] at org.h2.message.DbException.get(DbException.java:169) [error] at org.h2.message.DbException.getSyntaxError(DbException.java:194) [error] at org.h2.command.Parser.readColumnIdentifier(Parser.java:2777) [error] at org.h2.command.Parser.readTermObjectDot(Parser.java:2336) [error] at org.h2.command.Parser.readTerm(Parser.java:2453) [error] at org.h2.command.Parser.readFactor(Parser.java:2035) [error] at org.h2.command.Parser.readSum(Parser.java:2022) [error] at org.h2.command.Parser.readConcat(Parser.java:1995) [error] at org.h2.command.Parser.readCondition(Parser.java:1860) [error] at org.h2.command.Parser.readAnd(Parser.java:1841) [error] at org.h2.command.Parser.readExpression(Parser.java:1833) [error] at org.h2.command.Parser.parseSelectSimpleSelectPart(Parser.java:1746) [error] at org.h2.command.Parser.parseSelectSimple(Parser.java:1778) [error] at org.h2.command.Parser.parseSelectSub(Parser.java:1673) [error] at org.h2.command.Parser.parseSelectUnion(Parser.java:1518) [error] at org.h2.command.Parser.parseSelect(Parser.java:1506) [error] at org.h2.command.Parser.parsePrepared(Parser.java:405) [error] at org.h2.command.Parser.parse(Parser.java:279) [error] at org.h2.command.Parser.parse(Parser.java:251) [error] at org.h2.command.Parser.prepareCommand(Parser.java:217) [error] at org.h2.engine.Session.prepareLocal(Session.java:415) [error] at org.h2.engine.Session.prepareCommand(Session.java:364) [error] at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1119) [error] at org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:71) [error] at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:267) [error] at com.jolbox.bonecp.ConnectionHandle.prepareStatement(ConnectionHandle.java:820) [error] at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.getMoreIds(SequenceIdGenerator.java:193) [error] ... 80 more My model looks like this: @Entity @Table(name = "industry") public class Industry extends Model { @Id public Long id; public String name; public String shortname; // called in the view to trigger lazy-loading public String getName() { return name; } public static Finder<Long, Industry> find = new Finder<Long, Industry>(Long.class, Industry.class); } ... and finally the relevant part from my initial evolution: create table industry ( id bigint not null, name varchar(255), shortname varchar(255), constraint pk_industry primary key (id) } create sequence industry_seq start with 1000; Everything works fine running on my PostgreSQL DB, and from my point of view the code is not any different from the Play2.0 Computer Database Sample. I am happy for any help - thanks! Regards, Alex

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