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John Hitchcock of Pace Describes the Oracle Agile PLM Customer Experience

John Hitchcock, Senior Manager of Configuration Management at Pace (formerly 2Wire, Inc.), sat down for an interview during Oracle's Innovation Summit with Kerrie Foy, Manager of PLM Product Marketing at Oracle. Learn why his organization upgraded to the latest version of Agile and expanded the footprint to achieve impressive savings and productivity gains across the global, networked product value-chain.

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Auto-hydrate your objects with ADO.NET

- by Jake Rutherford

Recently while writing the monotonous code for pulling data out of a DataReader to hydrate some objects in an application I suddenly wondered "is this really necessary?" You've probably asked yourself the same question, and many of you have: - Used a code generator - Used a ORM such as Entity Framework - Wrote the code anyway because you like busy work In most of the cases I've dealt with when making a call to a stored procedure the column names match up with the properties of the object I am hydrating. Sure that isn't always the case, but most of the time it's 1 to 1 mapping. Given that fact I whipped up the following method of hydrating my objects without having write all of the code. First I'll show the code, and then explain what it is doing. /// <summary> /// Abstract base class for all Shared objects. /// </summary> /// <typeparam name="T"></typeparam> [Serializable, DataContract(Name = "{0}SharedBase")] public abstract class SharedBase<T> where T : SharedBase<T> { private static List<PropertyInfo> cachedProperties; /// <summary> /// Hydrates derived class with values from record. /// </summary> /// <param name="dataRecord"></param> /// <param name="instance"></param> public static void Hydrate(IDataRecord dataRecord, T instance) { var instanceType = instance.GetType(); //Caching properties to avoid repeated calls to GetProperties. //Noticable performance gains when processing same types repeatedly. if (cachedProperties == null) { cachedProperties = instanceType.GetProperties().ToList(); } foreach (var property in cachedProperties) { if (!dataRecord.ColumnExists(property.Name)) continue; var ordinal = dataRecord.GetOrdinal(property.Name); var isNullable = property.PropertyType.IsGenericType && property.PropertyType.GetGenericTypeDefinition() == typeof (Nullable<>); var isNull = dataRecord.IsDBNull(ordinal); var propertyType = property.PropertyType; if (isNullable) { if (!string.IsNullOrEmpty(propertyType.FullName)) { var nullableType = Type.GetType(propertyType.FullName); propertyType = nullableType != null ? nullableType.GetGenericArguments()[0] : propertyType; } } switch (Type.GetTypeCode(propertyType)) { case TypeCode.Int32: property.SetValue(instance, (isNullable && isNull) ? (int?) null : dataRecord.GetInt32(ordinal), null); break; case TypeCode.Double: property.SetValue(instance, (isNullable && isNull) ? (double?) null : dataRecord.GetDouble(ordinal), null); break; case TypeCode.Boolean: property.SetValue(instance, (isNullable && isNull) ? (bool?) null : dataRecord.GetBoolean(ordinal), null); break; case TypeCode.String: property.SetValue(instance, (isNullable && isNull) ? null : isNull ? null : dataRecord.GetString(ordinal), null); break; case TypeCode.Int16: property.SetValue(instance, (isNullable && isNull) ? (int?) null : dataRecord.GetInt16(ordinal), null); break; case TypeCode.DateTime: property.SetValue(instance, (isNullable && isNull) ? (DateTime?) null : dataRecord.GetDateTime(ordinal), null); break; } } } } Here is a class which utilizes the above: [Serializable] [DataContract] public class foo : SharedBase<foo> { [DataMember] public int? ID { get; set; } [DataMember] public string Name { get; set; } [DataMember] public string Description { get; set; } [DataMember] public string Subject { get; set; } [DataMember] public string Body { get; set; } public foo(IDataRecord record) { Hydrate(record, this); } public foo() {} } Explanation: - Class foo inherits from SharedBase specifying itself as the type. (NOTE SharedBase is abstract here in the event we want to provide additional methods which could be overridden by the instance class) public class foo : SharedBase<foo> - One of the foo class constructors accepts a data record which then calls the Hydrate method on SharedBase passing in the record and itself. public foo(IDataRecord record) { Hydrate(record, this); } - Hydrate method on SharedBase will use reflection on the object passed in to determine its properties. At the same time, it will effectively cache these properties to avoid repeated expensive reflection calls public static void Hydrate(IDataRecord dataRecord, T instance) { var instanceType = instance.GetType(); //Caching properties to avoid repeated calls to GetProperties. //Noticable performance gains when processing same types repeatedly. if (cachedProperties == null) { cachedProperties = instanceType.GetProperties().ToList(); } . . . - Hydrate method on SharedBase will iterate each property on the object and determine if a column with matching name exists in data record foreach (var property in cachedProperties) { if (!dataRecord.ColumnExists(property.Name)) continue; var ordinal = dataRecord.GetOrdinal(property.Name); . . . NOTE: ColumnExists is an extension method I put on IDataRecord which I’ll include at the end of this post. - Hydrate method will determine if the property is nullable and whether the value in the corresponding column of the data record has a null value var isNullable = property.PropertyType.IsGenericType && property.PropertyType.GetGenericTypeDefinition() == typeof (Nullable<>); var isNull = dataRecord.IsDBNull(ordinal); var propertyType = property.PropertyType; . . . - If Hydrate method determines the property is nullable it will determine the underlying type and set propertyType accordingly - Hydrate method will set the value of the property based upon the propertyType That’s it!!! The magic here is in a few places. First, you may have noticed the following: public abstract class SharedBase<T> where T : SharedBase<T> This says that SharedBase can be created with any type and that for each type it will have it’s own instance. This is important because of the static members within SharedBase. We want this behavior because we are caching the properties for each type. If we did not handle things in this way only 1 type could be cached at a time, or, we’d need to create a collection that allows us to cache the properties for each type = not very elegant. Second, in the constructor for foo you may have noticed this (literally): public foo(IDataRecord record) { Hydrate(record, this); } I wanted the code for auto-hydrating to be as simple as possible. At first I wasn’t quite sure how I could call Hydrate on SharedBase within an instance of the class and pass in the instance itself. Fortunately simply passing in “this” does the trick. I wasn’t sure it would work until I tried it out, and fortunately it did. So, to actually use this feature when utilizing ADO.NET you’d do something like the following: public List<foo> GetFoo(int? fooId) { List<foo> fooList; const string uspName = "usp_GetFoo"; using (var conn = new SqlConnection(_dbConnection)) using (var cmd = new SqlCommand(uspName, conn)) { cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(new SqlParameter("@FooID", SqlDbType.Int) {Direction = ParameterDirection.Input, Value = fooId}); conn.Open(); using (var dr = cmd.ExecuteReader()) { fooList= (from row in dr.Cast<DbDataRecord>() select new foo(row) ).ToList(); } } return fooList; } Nice! Instead of having line after line manually assigning values from data record to an object you simply create a new instance and pass in the data record. Note that there are certainly instances where columns returned from stored procedure do not always match up with property names. In this scenario you can still use the above method and simply do your manual assignments afterward.

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Simplifying C++11 optimal parameter passing when a copy is needed

- by Mr.C64

It seems to me that in C++11 lots of attention was made to simplify returning values from functions and methods, i.e.: with move semantics it's possible to simply return heavy-to-copy but cheap-to-move values (while in C++98/03 the general guideline was to use output parameters via non-const references or pointers), e.g.: // C++11 style vector<string> MakeAVeryBigStringList(); // C++98/03 style void MakeAVeryBigStringList(vector<string>& result); On the other side, it seems to me that more work should be done on input parameter passing, in particular when a copy of an input parameter is needed, e.g. in constructors and setters. My understanding is that the best technique in this case is to use templates and std::forward<>, e.g. (following the pattern of this answer on C++11 optimal parameter passing): class Person { std::string m_name; public: template <class T, class = typename std::enable_if < std::is_constructible<std::string, T>::value >::type> explicit Person(T&& name) : m_name(std::forward<T>(name)) { } ... }; A similar code could be written for setters. Frankly, this code seems boilerplate and complex, and doesn't scale up well when there are more parameters (e.g. if a surname attribute is added to the above class). Would it be possible to add a new feature to C++11 to simplify code like this (just like lambdas simplify C++98/03 code with functors in several cases)? I was thinking of a syntax with some special character, like @ (since introducing a &&& in addition to && would be too much typing :) e.g.: class Person { std::string m_name; public: /* Simplified syntax to produce boilerplate code like this: template <class T, class = typename std::enable_if < std::is_constructible<std::string, T>::value >::type> */ explicit Person(std::string@ name) : m_name(name) // implicit std::forward as well { } ... }; This would be very convenient also for more complex cases involving more parameters, e.g. Person(std::string@ name, std::string@ surname) : m_name(name), m_surname(surname) { } Would it be possible to add a simplified convenient syntax like this in C++? What would be the downsides of such a syntax?

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Building Queries Systematically

- by Jeremy Smyth

The SQL language is a bit like a toolkit for data. It consists of lots of little fiddly bits of syntax that, taken together, allow you to build complex edifices and return powerful results. For the uninitiated, the many tools can be quite confusing, and it's sometimes difficult to decide how to go about the process of building non-trivial queries, that is, queries that are more than a simple SELECT a, b FROM c; A System for Building Queries When you're building queries, you could use a system like the following: Decide which fields contain the values you want to use in our output, and how you wish to alias those fields Values you want to see in your output Values you want to use in calculations . For example, to calculate margin on a product, you could calculate price - cost and give it the alias margin. Values you want to filter with. For example, you might only want to see products that weigh more than 2Kg or that are blue. The weight or colour columns could contain that information. Values you want to order by. For example you might want the most expensive products first, and the least last. You could use the price column in descending order to achieve that. Assuming the fields you've picked in point 1 are in multiple tables, find the connections between those tables Look for relationships between tables and identify the columns that implement those relationships. For example, The Orders table could have a CustomerID field referencing the same column in the Customers table. Sometimes the problem doesn't use relationships but rests on a different field; sometimes the query is looking for a coincidence of fact rather than a foreign key constraint. For example you might have sales representatives who live in the same state as a customer; this information is normally not used in relationships, but if your query is for organizing events where sales representatives meet customers, it's useful in that query. In such a case you would record the names of columns at either end of such a connection. Sometimes relationships require a bridge, a junction table that wasn't identified in point 1 above but is needed to connect tables you need; these are used in "many-to-many relationships". In these cases you need to record the columns in each table that connect to similar columns in other tables. Construct a join or series of joins using the fields and tables identified in point 2 above. This becomes your FROM clause. Filter using some of the fields in point 1 above. This becomes your WHERE clause. Construct an ORDER BY clause using values from point 1 above that are relevant to the desired order of the output rows. Project the result using the remainder of the fields in point 1 above. This becomes your SELECT clause. A Worked Example Let's say you want to query the world database to find a list of countries (with their capitals) and the change in GNP, using the difference between the GNP and GNPOld columns, and that you only want to see results for countries with a population greater than 100,000,000. Using the system described above, we could do the following: The Country.Name and City.Name columns contain the name of the country and city respectively. The change in GNP comes from the calculation GNP - GNPOld. Both those columns are in the Country table. This calculation is also used to order the output, in descending order To see only countries with a population greater than 100,000,000, you need the Population field of the Country table. There is also a Population field in the City table, so you'll need to specify the table name to disambiguate. You can also represent a number like 100 million as 100e6 instead of 100000000 to make it easier to read. Because the fields come from the Country and City tables, you'll need to join them. There are two relationships between these tables: Each city is hosted within a country, and the city's CountryCode column identifies that country. Also, each country has a capital city, whose ID is contained within the country's Capital column. This latter relationship is the one to use, so the relevant columns and the condition that uses them is represented by the following FROM clause: FROM Country JOIN City ON Country.Capital = City.ID The statement should only return countries with a population greater than 100,000,000. Country.Population is the relevant column, so the WHERE clause becomes: WHERE Country.Population > 100e6 To sort the result set in reverse order of difference in GNP, you could use either the calculation, or the position in the output (it's the third column): ORDER BY GNP - GNPOld or ORDER BY 3 Finally, project the columns you wish to see by constructing the SELECT clause: SELECT Country.Name AS Country, City.Name AS Capital, GNP - GNPOld AS `Difference in GNP` The whole statement ends up looking like this: mysql> SELECT Country.Name AS Country, City.Name AS Capital, -> GNP - GNPOld AS `Difference in GNP` -> FROM Country JOIN City ON Country.Capital = City.ID -> WHERE Country.Population > 100e6 -> ORDER BY 3 DESC; +--------------------+------------+-------------------+ | Country | Capital | Difference in GNP | +--------------------+------------+-------------------+ | United States | Washington | 399800.00 | | China | Peking | 64549.00 | | India | New Delhi | 16542.00 | | Nigeria | Abuja | 7084.00 | | Pakistan | Islamabad | 2740.00 | | Bangladesh | Dhaka | 886.00 | | Brazil | Brasília | -27369.00 | | Indonesia | Jakarta | -130020.00 | | Russian Federation | Moscow | -166381.00 | | Japan | Tokyo | -405596.00 | +--------------------+------------+-------------------+ 10 rows in set (0.00 sec) Queries with Aggregates and GROUP BY While this system might work well for many queries, it doesn't cater for situations where you have complex summaries and aggregation. For aggregation, you'd start with choosing which columns to view in the output, but this time you'd construct them as aggregate expressions. For example, you could look at the average population, or the count of distinct regions.You could also perform more complex aggregations, such as the average of GNP per head of population calculated as AVG(GNP/Population). Having chosen the values to appear in the output, you must choose how to aggregate those values. A useful way to think about this is that every aggregate query is of the form X, Y per Z. The SELECT clause contains the expressions for X and Y, as already described, and Z becomes your GROUP BY clause. Ordinarily you would also include Z in the query so you see how you are grouping, so the output becomes Z, X, Y per Z. As an example, consider the following, which shows a count of countries and the average population per continent: mysql> SELECT Continent, COUNT(Name), AVG(Population) -> FROM Country -> GROUP BY Continent; +---------------+-------------+-----------------+ | Continent | COUNT(Name) | AVG(Population) | +---------------+-------------+-----------------+ | Asia | 51 | 72647562.7451 | | Europe | 46 | 15871186.9565 | | North America | 37 | 13053864.8649 | | Africa | 58 | 13525431.0345 | | Oceania | 28 | 1085755.3571 | | Antarctica | 5 | 0.0000 | | South America | 14 | 24698571.4286 | +---------------+-------------+-----------------+ 7 rows in set (0.00 sec) In this case, X is the number of countries, Y is the average population, and Z is the continent. Of course, you could have more fields in the SELECT clause, and more fields in the GROUP BY clause as you require. You would also normally alias columns to make the output more suited to your requirements. More Complex Queries Queries can get considerably more interesting than this. You could also add joins and other expressions to your aggregate query, as in the earlier part of this post. You could have more complex conditions in the WHERE clause. Similarly, you could use queries such as these in subqueries of yet more complex super-queries. Each technique becomes another tool in your toolbox, until before you know it you're writing queries across 15 tables that take two pages to write out. But that's for another day...

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Check parameters annotated with @Nonnull for null?

- by David Harkness

We've begun using FindBugs with and annotating our parameters with @Nonnull appropriately, and it works great to point out bugs early in the cycle. So far we have continued checking these arguments for null using Guava's checkNotNull, but I would prefer to check for null only at the edges--places where the value can come in without having been checked for null, e.g., a SOAP request. // service layer accessible from outside public Person createPerson(@CheckForNull String name) { return new Person(Preconditions.checkNotNull(name)); } ... // internal constructor accessed only by the service layer public Person(@Nonnull String name) { this.name = Preconditions.checkNotNull(name); // remove this check? } I understand that @Nonnull does not block null values itself. However, given that FindBugs will point out anywhere a value is transferred from an unmarked field to one marked @Nonnull, can't we depend on it to catch these cases (which it does) without having to check these values for null everywhere they get passed around in the system? Am I naive to want to trust the tool and avoid these verbose checks? Bottom line: While it seems safe to remove the second null check below, is it bad practice? This question is perhaps too similar to Should one check for null if he does not expect null, but I'm asking specifically in relation to the @Nonnull annotation.

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How to remove java.sql.BatchUpdateException in Grails? [closed]

- by aman.nepid

I have a domain like this: class BusinessOrganization { static hasMany = [organizationBusinessTypes:OrganizationBusinessType] String name String icon static constraints = { name(blank:false,unique:true) icon(unique:true) } String toString() { return "${name}" } } When I save some data for first time it works fine. But when by the next time it shows this error : Error 500: Internal Server Error URI /nLocatePortal/businessOrganization/save Class java.sql.BatchUpdateException Message Batch entry 0 insert into business_organization (version, icon, name, id) values ('0', '', 'dddd', '2') was aborted. Call getNextException to see the cause. **Around line 24 of grails-app/controllers/com/nlocate/portal/BusinessOrganizationController.groovy** 21: 22: def save() { 23: def businessOrganizationInstance = new BusinessOrganization(params) 24: if (!businessOrganizationInstance.save(flush: true)) { 25: render(view: "create", model: [businessOrganizationInstance: businessOrganizationInstance]) 26: return 27: } Please someone help me why this is happening. I am new to Grails. I have not modified the controllers but still I get this error.

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Content API for Shopping Office Hours - June 12, 2012

Content API for Shopping Office Hours - June 12, 2012 Hangout discussing Product Listing Ads (PLAs) and the Google Affiliate Network (GAN) with guest Mark Coppin (GAN) and Claire Hugo (PLAs) of Google. In the Hangout, we reference the video "How to create a new Product Listing Ads campaign" (www.youtube.com which can be found in the Getting Starting page on the Shopping/Ads integration site (www.google.com Also, check out the GAN site to learn more: www.google.com From: GoogleDevelopers Views: 703 6 ratings Time: 31:23 More in Science & Technology

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Stumbling Through: Visual Studio 2010 (Part I)

Ive spent the better part of the last two years doing nothing but K2 workflow development, which until very recently could only be done in Visual Studio 2005 so I am a bit behind the times. I seem to have skipped over using Visual Studio 2008 entirely, and I am now ready to stumble through all that Ive missed. Not that I will abandon my K2 ramblings, but I need to get back to some of the other technologies I am passionate about but havent had the option of working with them on a day-to-day basis as I have with K2 blackpearl. Specifically, I am going to be focusing my efforts on what is new in the Entity Framework and WPF in Visual Studio 2010, though you have to keep in mind that since I have skipped VS 2008, I may be giving VS 2010 credit for things that really have been around for a while (hey, if I havent seen it, it is new to me!). I have the following simple goals in mind for this exercise: Entity Framework Model an inherited class Entity Framework Model a lookup entity WPF Bind a list of entities WPF - on selection of an entity in the bound list, display values of the selected entity WPF For the lookup field, provide a dropdown of potential values to lookup All of these goals must be accomplished using as little code as possible, relying on the features we get out of the box in Visual Studio 2010. This isnt going to be rocket science here, Im not even looking to get or save this data from/to a data source, but I gotta start somewhere and hopefully it will grow into something more interesting. For this exercise, I am going to try to model some fictional data about football players and personnel (maybe turning this into some sort of NFL simulation game if I lose my job and can play with this all day), so Ill start with a Person class that has a name property, and extend that with a Player class to include a Position lookup property. The idea is that a Person can be a Player, Coach or whatever other personnel type may be associated with a football team but well only flesh out the Player aspect of a person for this. So to get started, I fired up Visual Studio 2010 and created a new WPF Application: To this project, I added a new ADO.NET Entity Data Model named PlayerModel (for now, not sure what will be an appropriate name so this may be revisited): I chose for it to be an empty model, as I dont have a database designed for this yet: Using the toolbox, I dragged out an entity for each of the items we identified earlier: Person, Player and Position, and gave them some simple properties (note that I kept the default Id property for each of them): Now to figure out how to link these things together the way I want to first, lets try to tell it that Player extends Person. I see that Inheritance is one of the items in the toolbox, but I cant seem to drag it out anywhere onto the canvas. However, when I right-click an element, I get the option to Add Inheritance to it, which gives us exactly what we want: Ok, now that we have that, how do we tell it that each player has a position? Well, despite association being in the toolbox, I have learned that you cant just drag and drop those elements so I right click Player and select Add -> Association to get the following dialog: I see the option here to Add foreign key properties to my entities Ive read somewhere this this is a new and highly-sought after feature so Ill see what it does. Selecting it includes a PositionId on the Player element for me, which seems pretty database-centric and I would like to see if I can live without it for now given that we also got the Position property out of this association. Ill bring it back into the fold if it ends up being useful later. Here is what we end up with now: Trying to compile this resulted in an error stating that the Player entity cannot have an Id, because the Person element it extends already has a property named Id. Makes sense, so I remove it and compile again. Success, but with a warning but success is a good thing so Ill pretend I didnt see that warning for now. It probably has to do with the fact that my Player entity is now pretty useless as it doesnt have any non-navigation properties. So things seem to match what we are going for, great now what the heck do we do with this? Lets switch gears and see what we get for free dealing with this model from the UI. Lets open up the MainWindow.xaml and see if we can connect to our entities as a data source. Hey, whats this? Have you read my mind, Visual Studio? Our entities are already listed in the Data Sources panel: I do notice, however, that our Player entity is missing. Is this due to that compilation warning? Ill add a bogus property to our player entity just to see if that is the case no, still no love. The warning reads: Error 2062: No mapping specified for instances of the EntitySet and AssociationSet in the EntityContainer PlayerModelContainer. Well if everything worked without any issues, then I wouldnt be stumbling through at all, so lets get to the bottom of this. My good friend google indicates that the warning is due to the model not being tied up to a database. Hmmm, so why dont Players show up in my data sources? A little bit of drill-down shows that they are, in fact, exposed under Positions: Well now that isnt quite what I want. While you could get to players through a position, it shouldnt be that way exclusively. Oh well, I can ignore that for now lets drag Players out onto the canvas after selecting List from the dropdown: Hey, what the heck? I wanted a list not a listview. Get rid of that list view that was just dropped, drop in a listbox and then drop the Players entity into it. That will bind it for us. Of course, there isnt any data to show, which brings us to the really hacky part of all this and that is to stuff some test data into our view source without actually getting it from any data source. To do this through code, we need to grab a reference to the positionsPlayersViewSource resource that was created for us when we dragged out our Players entity. We then set the source of that reference equal to a populated list of Players. Well add a couple of players that way as well as a few positions via the positionsViewSource resource, and Ill ensure that each player has a position specified. Ultimately, the code looks like this: System.Windows.Data.CollectionViewSource positionViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("positionsViewSource"))); List<Position> positions = new List<Position>(); Position newPosition = new Position(); newPosition.Id = 0; newPosition.Name = "WR"; positions.Add(newPosition); newPosition = new Position(); newPosition.Id = 1; newPosition.Name = "RB"; positions.Add(newPosition); newPosition = new Position(); newPosition.Id = 2; newPosition.Name = "QB"; positions.Add(newPosition); positionViewSource.Source = positions; System.Windows.Data.CollectionViewSource playerViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("positionsPlayersViewSource"))); List<Player> players = new List<Player>(); Player newPlayer = new Player(); newPlayer.Id = 0; newPlayer.Name = "Test Dude"; newPlayer.Position = positions[0]; players.Add(newPlayer); newPlayer = new Player(); newPlayer.Id = 1; newPlayer.Name = "Test Dude II"; newPlayer.Position = positions[1]; players.Add(newPlayer); newPlayer = new Player(); newPlayer.Id = 2; newPlayer.Name = "Test Dude III"; newPlayer.Position = positions[2]; players.Add(newPlayer); playerViewSource.Source = players; Now that our views are being loaded with data, we can go about tying things together visually. Drop a text box (to show the selected players name) and a combo box (to show the selected players position). Drag the Positions entity from the data sources panel to the combo box to wire it up to the positions view source. Click the text box that was dragged, and find its Text property in the properties pane. There is a little glyph next to it that displays Advanced Properties when hovered over click this and then select Apply Data Binding. In the dialog that appears, we can select the current players name as the value to bind to: Similarly, we can wire up the combo boxs SelectedItem value to the current players position: When the application is executed and we navigate through the various players, we automatically get their name and position bound to the appropriate fields: All of this was accomplished with no code save for loading the test data, and I might add, it was pretty intuitive to do so via the drag and drop of entities straight from the data sources panel. So maybe all of this was old hat to you, but I was very impressed with this experience and I look forward to stumbling through the caveats of doing more complex data modeling and binding in this fashion. Next up, I suppose, will be figuring out how to get the entities to get real data from a data source instead of stuffing it with test data as well as trying to figure out why Players ended up being under Positions in the data sources panel.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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Problem connecting to isp server using xl2tpd as client. Ubuntu server 13.04

- by Deon Pretorius

I have followed guides found on google and ubuntu support pages and can get xl2tpd connection up but only under the following conditions: 1 - ADSL model must be configured and connected to the ISP or 2 - ADSL modem in bridge mode I must have an existing PPPoe connection established. If neither of the above are active xl2tpd wont trigger pppd and connect to the isp and thus tunnel connection fails to connect to the L2TP server of the ISP. Am I doing something wrong; /etc/ppp/options.l2tpd.axxess ipcp-accept-local ipcp-accept-remote refuse-eap refuse-chap require-pap noccp noauth idle 1800 mtu 1200 mru 1200 defaultroute usepeerdns debug lock connect-delay 5000 name (name used for ppp connection) /etc/ppp/pap-secrets # * password (name used for ppp connection as above) * (ppp password supplied by isp) /etc/xl2tpd/xl2tpd.conf [global] ; Global parameters: auth file = /etc/xl2tpd/l2tp-secrets ; * Where our challenge secrets are access control = yes ; * Refuse connections without IP match debug tunnel = yes [lac axxess] lns = 196.30.121.50 ; * Who is our LNS? redial = yes ; * Redial if disconnected? redial timeout = 5 ; * Wait n seconds between redials max redials = 5 ; * Give up after n consecutive failures hidden bit = yes ; * User hidden AVP's? length bit = yes ; * Use length bit in payload? require pap = yes ; * Require PAP auth. by peer require chap = no ; * Require CHAP auth. by peer refuse chap = yes ; * Refuse CHAP authentication require authentication = yes ; * Require peer to authenticate name = BLA85003@axxess ; * Report this as our hostname ppp debug = yes ; * Turn on PPP debugging pppoptfile = /etc/ppp/options.l2tpd.axxess ; * ppp options file for this lac /etc/xl2tpd/l2tp-secrets # Secrets for authenticating l2tp tunnels # us them secret # * marko blah2 # zeus marko blah # * * interop * vzb_l2tp (*** secret supplied by isp) ^ isp server host name Any help will be greatly appreciated

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.htaccess url rewriting problem

- by letsworktogether

I'm kind of stuck at this part and was hoping that I'd get some assistance. I'm building a highscores page in PHP, that's going great, it works. however, I dislike the idea of "index.php?skill=name" and therefore wanted a bit of SEO in this. I have successfully replaced the url with a more friendly version: "highscores/skill/name" And this is where the problem starts, I have added pagination to the highscores and the page is read from the HTTP_GET page variable ($_GET['page']). I dislike the idea of "highscores/skill/name&page=2" and was hoping if you guys could assist me to make the url like the following: Page 1, so accessing the file without declaring the page number: DOMAIN.TLD/highscores/skill/name Page 1 so now the page variable is needed:DOMAIN.TLD/highscores/skill/name/2 As you can tell the "2" will define page 2 and load the correct data for page 2. However, I'm having much trouble in my .htaccess file to configure it this way. RewriteRule ^highscores\/skill\/(.*?)(\/(.*?)*)$ highscores/skills.php?skill=$1&page=$2 [L] # Skills page That is my latest attempt in order to get it to work, unfortunately it does not work, it makes the page look horrible (CSS doesn't work) and it doesn't go to the page specified on the URL. I hope you understand my issue, thank you!

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Is There a Real Advantage to Generic Repository?

- by Sam

Was reading through some articles on the advantages of creating Generic Repositories for a new app (example). The idea seems nice because it lets me use the same repository to do several things for several different entity types at once: IRepository repo = new EfRepository(); // Would normally pass through IOC into constructor var c1 = new Country() { Name = "United States", CountryCode = "US" }; var c2 = new Country() { Name = "Canada", CountryCode = "CA" }; var c3 = new Country() { Name = "Mexico", CountryCode = "MX" }; var p1 = new Province() { Country = c1, Name = "Alabama", Abbreviation = "AL" }; var p2 = new Province() { Country = c1, Name = "Alaska", Abbreviation = "AK" }; var p3 = new Province() { Country = c2, Name = "Alberta", Abbreviation = "AB" }; repo.Add<Country>(c1); repo.Add<Country>(c2); repo.Add<Country>(c3); repo.Add<Province>(p1); repo.Add<Province>(p2); repo.Add<Province>(p3); repo.Save(); However, the rest of the implementation of the Repository has a heavy reliance on Linq: IQueryable<T> Query(); IList<T> Find(Expression<Func<T,bool>> predicate); T Get(Expression<Func<T,bool>> predicate); T First(Expression<Func<T,bool>> predicate); //... and so on This repository pattern worked fantastic for Entity Framework, and pretty much offered a 1 to 1 mapping of the methods available on DbContext/DbSet. But given the slow uptake of Linq on other data access technologies outside of Entity Framework, what advantage does this provide over working directly with the DbContext? I attempted to write a PetaPoco version of the Repository, but PetaPoco doesn't support Linq Expressions, which makes creating a generic IRepository interface pretty much useless unless you only use it for the basic GetAll, GetById, Add, Update, Delete, and Save methods and utilize it as a base class. Then you have to create specific repositories with specialized methods to handle all the "where" clauses that I could previously pass in as a predicate. Is the Generic Repository pattern useful for anything outside of Entity Framework? If not, why would someone use it at all instead of working directly with Entity Framework? Edit: Original link doesn't reflect the pattern I was using in my sample code. Here is an (updated link).

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WebLogic Server 11gR1 Interactive Quick Reference

- by JuergenKress

The WebLogic Server 11gR1 Administration interactive quick reference is a multimedia tool for various terms and concepts used in WebLogic Server architecture. This tool is available for administrators for online or offline use. This is built as a multimedia web page which provides descriptions of WebLogic Server Architectural components, and references to relevant documentation. This tool offers valuable reference information for any complex concept or product in an intuitive and useful manner. Each interactive type presents data that may be available in the documentation (in the case of Oracle products), but presents it in a way that is more intuitive and useful to a user of Oracle products because it displays data the way it is used in a real world, best practice scenario. For example, the architectural diagram interactive type provides an image of an architectural diagram that is typically larger than a single slide or paper. The image is scrollable and provides zoom capabilities to easily and clearly view any part of the image. The image itself contains a hotspot map that you can click to get more information about a feature, including reference links to the documentation in question. Linking the visual image of the component and where it fits in the overall architecture of the product, or technology in use, to the technical explanation and how-to materials related to that component is something not offered by the documentation. In a future release, the poster will also enable you to drill down even further into the individual subsystems in nested diagrams to look at the details of that subsystem. In short, the interactive posters are good at showing you the big picture, then quickly and easily getting you to the detailed information you need. In an instant, you can see where a technical component fits into an overall architecture, and zero in on the nitty-gritty details that show you how to do it yourself. Note: This is a first initial release with more features in development. Currently known information: Only Firefox 8.0 and higher is known to work with this product. This product may work with Chrome and Safari browsers, but is known to have issues in Internet Explorer at this time. Smartphones, such as iPads and iPhones, are partially supported WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. BlogTwitterLinkedInMixForumWiki Technorati Tags: WebLogic server quick reference,weblogic overview,weblogic 12c,WebLogic Community,Oracle,OPN,Jürgen Kress

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Trends in today's CRM Marketplace

Christine Viera, Vice President, Product management discusses the trends in the CRM Marketplace today and how Oracle is using its PeopleSoft and Siebel acquisitions to build a better product.

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In a multidisciplicary team, how much should each member's skills overlap?

- by spade78

I've been working in embedded software development for this small startup and our team is pretty small: about 3-4 people. We're responsible for all engineering which involves an RF device controlled by an embedded microcontroller that connects to a PC host which runs some sort of data collection and analysis software. I have come to develop these two guidelines when I work with my colleagues: Define a clear separation of responsibilities and make sure each person's contribution to the final product doesn't overlap. Don't assume your colleagues know everything about their responsibilities. I assume there is some sort of technology that I will need to be competent at to properly interface with the work of my colleagues. The first point is pretty easy for us. I do firmware, one guy does the RF, another does the PC software, and the last does the DSP work. Nothing overlaps in terms of two people's work being mixed into the final product. For that to happen, one guy has to hand off work to another guy who will vet it and integrate it himself. The second point is the heart of my question. I've learned the hard way not to trust the knowledge of my colleagues absolutley no matter how many years experience they claim to have. At least not until they've demonstrated it to me a couple of times. So given that whenever I develop a piece of firmware, if it interfaces with some technology that I don't know then I'll try to learn it and develop a piece of test code that helps me understand what they're doing. That way if my piece of the product comes into conflict with another piece then I have some knowledge about possible causes. For example, the PC guy has started implementing his GUI's in .NET WPF (C#) and using LibUSBdotNET for USB access. So I've been learning C# and the .NET USB library that he uses and I build a little console app to help me understand how that USB library works. Now all this takes extra time and energy but I feel it's justified as it gives me a foothold to confront integration problems. Also I like learning this new stuff so I don't mind. On the other hand I can see how this can turn into a time synch for work that won't make it into the final product and may never turn into a problem. So how much experience/skills overlap do you expect in your teammates relative to your own skills? Does this issue go away as the teams get bigger and more diverse?

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How To: Using SimpleMembserhipProvider with MySql Connector/Net.

- by Francisco Tirado

Now on Connector/Net 6.9 the users will have the ability to use SimpleMembership Provider on MVC4 templates. The configuration is very simple and also have compatibility with OAuth, in this post we'll explain step by step how to configure it in a MVC 4 Web Application. Requirements The requirements to use SimpleMembership with Connector/Net are: Install Connector/Net 6.9, or download the No Install version. Net Framework 4.0 or greater. MVC 4 Visual Studio 2012 or newer version Creating and configuring a new project In this example we'll use VS2012 to create the project basis on the Internet Aplication template and using Entity Framework to manage the User model. Open VS 2012 and create a new project, we'll create a new MVC 4 Web Application and configure the project to use Net Framework 4.5. Type a name for the project and then click “Ok”. In the next dialog we'll choose the “Internet Application” template and use Razor as engine without creating a test project. Click “Ok” to continue. Now we have a new project with the templates necessaries to run a Web Application with the default values. We'll use the current files to continue working. If you have installed Connector/Net you can skip this step, if you don't have installed but you're planning to do it, please install it and continue with the next step. If you're using the No Install version of Connector/Net we'll need to add the references to our project, the assemblies needed are: MySql.Data, MySql.Data.Entities and MySql.Web. Be sure that the assemblies chosen match the Net Framework version used in our project and the MySql.Data.Entities is compatible with EF5 (EF5 is the default added by the project). Now open the “web.config” file, and under the <connectionStrings> node add a connection string that points to a MySql instance. We'll use the following connection configuration: <add name="MyConnection" connectionString="server=localhost;UserId=root;password=pass;database=MySqlSimpleMembership;" providerName="MySql.Data.MySqlClient"/> Under the node <system.web> we'll add the following configuration: <membership defaultProvider="MySqlSimpleMembershipProvider"><providers><clear/><add name="MySqlSimpleMembershipProvider" type="MySql.Web.Security.MySqlSimpleMembershipProvider,MySql.Web,Version=6.9.3.0,Culture=neutral,PublicKeyToken=c5687fc88969c44d" applicationName="MySqlSimpleMembershipTest" description="MySQLdefaultapplication" connectionStringName="MyConnection" userTableName="UserProfile" userIdColumn="UserId" userNameColumn="UserName" autoGenerateTables="True"/></providers></membership> In the previous configuration the mandatory properties are: connectionStringName, userTableName, userIdColumn, userNameColumn and autoGenerateTables. If the other properties are not provided a default value is set to it but if the mandatory properties are not set a ProviderException will be thrown. The valid properties for the MySqlSimpleMembership are the same used for MySqlMembership plus the mandatory fields. UserTableName: Name of the table where will be stored the user, this table is independent from the schema generated by the provider and can be edited later by the user. UserId: name of the column that will store the id for the records in the userTableName. UserName : name of the column that will store the name/user for the records in the userTableName. The connectionStringName property must match a connection string defined in web.config file. Once the configuration is done in web.config, we need to be sure that our database context for the Users Table point to the right connection string. In our case we just need to update the class UsersContext in the file AcountModel.cs in the Models folder. The file also contains the UserProfile class which match the configuration for our UserTable. Other class that needs to be updated is the SimpleMembershipInitializer in the file InitializeSimpleMembershipAttribute.cs in the Filters folder. In that class we'll see a call to the method “WebSecurity.InitializeDatabaseConnection”, in that call is where we need to update the parameters to match our configuration. If the database that you configure in your connection string doesn't exists, you need to create it empty. Now we're ready to run our web application, press F5 or the Run button in the tool bar. You'll see the following screen: If you go to your database used by the application you'll see some tables created, now we are using SimpleMembership. Now create a user, click on “Register” at the top-right in the web page. Type your user name and password, then click on “Register”. You'll be redirected to the home page and you'll see the name of your user at the top-right page. If you take a look on the tables just created in your database you will find the data about the user you just register. In our case the tables that contains the information are UserProfile and Webpages_Membership. Configuring OAuth Other option to access your website will be using OAuth, so you can validate an user using an external account like Facebook, Twitter, Google, etc. In this post we'll enable the authentication for Google account in our application. Go to the class AuthConfig.cs in the folder App_Start. In the method “RegisterAuth” uncomment the last line where is the call to the method “OauthWebSecurity.RegisterGoogleClient”. Run the application. Once the application is running click on “Login”. You will see at the right side the option to login using a Google account, click on “Google”. You will be asked for Google credentials. If your login is successful you'll see a message asking for your approval to give permission to your site to access your information. Click on “Accept”. Now a page to register your user will be shown, click on “Register”. Now your new user is logged in in your application. You can take a look of the user information created in the tables UserProfile and Webpages_OauthMembership. If you want to use another external option to authenticate users you must enable the client in the same class where we enable the Google authentication, but for others providers is mandatory to register your Application in their site. Once you have register your application they will give you a token/key and the id for your application, that information you're going to use it to register the client. Thanks for reading.

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SUM of metric for normalized logical hierarchy

- by Alex254

Suppose there's a following table Table1, describing parent-child relationship and metric: Parent | Child | Metric (of a child) ------------------------------------ name0 | name1 | a name0 | name2 | b name1 | name3 | c name2 | name4 | d name2 | name5 | e name3 | name6 | f Characteristics: 1) Child always has 1 and only 1 parent; 2) Parent can have multiple children (name2 has name4 and name5 as children); 3) Number of levels in this "hierarchy" and number of children for any given parent are arbitrary and do not depend on each other; I need SQL request that will return result set with each name and a sum of metric of all its descendants down to the bottom level plus itself, so for this example table the result would be (look carefully at name1): Name | Metric ------------------ name1 | a + c + f name2 | b + d + e name3 | c + f name4 | d name5 | e name6 | f (name0 is irrelevant and can be excluded). It should be ANSI or Teradata SQL. I got as far as a recursive query that can return a SUM (metric) of all descendants of a given name: WITH RECURSIVE temp_table (Child, metric) AS ( SELECT root.Child, root.metric FROM table1 root WHERE root.Child = 'name1' UNION ALL SELECT indirect.Child, indirect.metric FROM temp_table direct, table1 indirect WHERE direct.Child = indirect.Parent) SELECT SUM(metric) FROM temp_table; Is there a way to turn this query into a function that takes name as an argument and returns this sum, so it can be called like this? SELECT Sum_Of_Descendants (Child) FROM Table1; Any suggestions about how to approach this from a different angle would be appreciated as well, because even if the above way is implementable, it will be of poor performance - there would be a lot of iterations of reading metrics (value f would be read 3 times in this example). Ideally, the query should read a metric of each name only once.

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Existential CAML - does an item exist?

- by PointsToShare

© 2011 By: Dov Trietsch. All rights reserved More CAML and existence. In “SharePoint List Issues” and “Passing the CAML thru the EY of the NEEDL we saw how to use CAML to return a subset of a list and also how to check the existence of lists, fields, defaults, and values. Here is a general function that may be used to get a subset of a list by comparing a “text” type field to a given value. The function is pretty smart. It can be used to check existence or to return a collection of items that may be further processed. It handles non existing fields and replaces them with the ubiquitous “Title”, but only once! /// Build an SPQuery that returns a selected set of columns from a List /// titleField must be a "Text" type field /// When the titleField parameter is empty ("") "Title" is assumed /// When the title parameter is empty ("") All is assumed /// When the columnNames parameter is null, the query returns all the fields /// When the rowLimit parameter is 0, the query return all the items. /// with a non-zero, the query returns at most rowLimits /// /// usage: to check if an item titled "Blah" exists in your list, do: /// colNames = {"Title"} /// col = GetListItemColumnByTitle(myList, "", "Blah", colNames, 1) /// Check the col.Count. if > 0 the item exists and is in the collection private static SPListItemCollection GetListItemColumnByTitle(SPList list, string titleField, string title, string[] columnNames, uint rowLimit) { try { char QT = Convert.ToChar((int)34); SPQuery query = new SPQuery(); if (title != "") { string tf = titleField; if (titleField == "") tf = "Title"; tf = CAMLThisName(list, tf, "Title"); StringBuilder titleQuery = new StringBuilder ("<Where><Eq><FieldRef Name="); titleQuery.Append(QT); titleQuery.Append(tf); titleQuery.Append(QT); titleQuery.Append("/><Value Type="); titleQuery.Append(QT); titleQuery.Append("Text"); titleQuery.Append(QT); titleQuery.Append(">"); titleQuery.Append(title); titleQuery.Append("</Value></Eq></Where>"); query.Query = titleQuery.ToString(); } if (columnNames.Length != 0) { StringBuilder sb = new StringBuilder(""); bool TitleAlreadyIncluded = false; foreach (string columnName in columnNames) { string tst = CAMLThisName(list, columnName, "Title"); //Allow Title only once if (tst != "Title" || !TitleAlreadyIncluded) { sb.Append("<FieldRef Name="); sb.Append(QT); sb.Append(tst); sb.Append(QT); sb.Append("/>"); if (tst == "Title") TitleAlreadyIncluded = true; } } query.ViewFields = sb.ToString(); } if (rowLimit > 0) { query.RowLimit = rowLimit; } SPListItemCollection col = list.GetItems(query); return col; } catch (Exception ex) { //Console.WriteLine("GetListItemColumnByTitle" + ex.ToString()); //sw.WriteLine("GetListItemColumnByTitle" + ex.ToString()); return null; } } Here I called it for a list in which “Author” (it is the internal name for “Created”) and “Blah” do not exist. The list of column names is: string[] columnNames = {"Test Column1", "Title", "Author", "Allow Multiple Ratings", "Blah"}; So if I use this call, I get all the items for which “01-STD MIL_some” has the value of 1. the fields returned are: “Test Column1”, “Title”, and “Allow Multiple Ratings”. Because “Title” was already included and the default for non exixsting is “Title”, it was not replicated for the 2 non-existing fields. SPListItemCollection col = GetListItemColumnByTitle(masterList, "01-STD MIL_some", "1", columnNames, 0); The following call checks if there are any items where “01-STD MIL_some” has the value of “1”. Note that I limited the number of returned items to 1. SPListItemCollection col = GetListItemColumnByTitle(masterList, "01-STD MIL_some", "1", columnNames, 1); The code also uses the CAMLThisName function that checks for an existence of a field and returns its InternalName. This is yet another useful function that I use again and again. /// <summary> /// return a fields internal name (CAMLName) /// or the "default" name that you passed. /// To check existence pass "" or some funny name like "mud in your eye" /// </summary> public static string CAMLThisName(SPList list, string name, string def) { String CAMLName = def; SPField fld = GetFieldByName(list, name); if (fld != null) { CAMLName = fld.InternalName; } return CAMLName; } That’s all folks?!

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How exactly is Google Webmaster Tools measuring "Site Performance"?

- by Rémi

I've been working for two months now on improving our response time (mainly server side) on a new forum (a brand new product on a technical point of view) we've launched in Germany a few month ago and I'm a lot surprised by the results I get. I monitor our response time using Apache logs and our own implementation of Boomerang beacon. Using my stats, I can see that our new product responds in about 680 ms where our old product was responding in about 1050 ms. On the other side, Google Webmaster Tool tells us that our pages have an average reponse time of about 1500 ms today where it was 700 three months ago with our old product. I've figured that GWT was taking client side metrics into account so I've added some measures on our Boomerang beacon and everything looks just fine. I've also ran some random pages on ySlow and Google's Page Speed and everything looks better than it was before. We event have a 82% on Google's Page Speed tool which is quite cool for a site with some ads in it :) Lately, we have signed a deal with Akamai to use two of their products : CDN for our static files (we were using another CDN before but it wasn't very effective) and RMA to improve Networks routes. We have also introduced a new agressive cache mecanism to ensure that most of the pages served to crawlers are cached by our memcache grid. After checking my metrics, it seems that this changes have improved from 650ms to about 500ms, which is good (still not great but it is definitly an improvement). But webmaster tools continues to report an increasing average response time where we see it decreasing in the same time. Have you ever had the same kind of wierd behavior on your sites while doing performance improvements ? Do you have any idea how to monitor the same thing Google does with Site Performance in Google Webmaster Tools so that we could improve our site and constantly check if it is what Google wants ? Edit 2011/07/26 : Thanks for your answers guys ! Nevertheless, I was not precise enough. The main issue we have is not with the Site Performance page but with the Crawl Stats one for now. We probably found an issue on our side with some very slow pages (around 3000 ms !!) and we are trying to fix them. I'll keep you posted as soon I'll have some infos. Thanks again !

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The Acquisition of PLM Leader, Agile, Provides Oracle Customers with Great Benefits

Jon Chorley, Oracle's Vice President of Supply Chain Product Strategy, discusses with Cliff, the strategic importance of Product Lifecycle Management (PLM) to Oracle, why Agile best addresses these needs, and the benefits this acquisition will provide customers and partners.

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Managing and Connecting to AlwaysOn Availability Groups

From the previous AlwaysOn Availability Group article, we provided a name for the availability group listener which is simply a unique DNS name as a Virtual Network Name (VNN) to direct read-write requests to the primary replica and read-only requests to the read-only secondary replica. The Future of SQL Server Monitoring "Being web-based, SQL Monitor enables you to check on your servers from almost any location" Jonathan Allen.Try SQL Monitor now.

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Generating grammatically correct MUD-style attack descriptions

- by Extrakun

I am currently working on a text based game, where the outcome of a combat round goes something like this %attacker% inflicts a serious wound (12 points damage) on %defender% Right now, I just swap %attacker% with the name of the attacker, and %defender% for the name of the defender. However, the description works, but don't read correctly. Since the game is just all text, I don't want to resort to generic descriptions (Such as "You use Attack on Goblin for 5 damage", which arguably solve the problem) How do I generate correct descriptions for cases where %attacker% refers to "You", the player? "You inflicts..." is wrong "Bees", or other plural? I need somehow to know I should prefix the name with a "The " If %attacker% is a generic noun, such as "Goblin", it will read weird as opposed to %attacker% being a name. Compare "Goblin inflicts..." vs. "Aldraic Swordbringer inflicts...." How does text-based games usually resolve such issues?

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Find PublicKeyToken easily

- by Sahil Malik

SharePoint 2010 Training: more information This tip will make it easy for you to get that assembly name right within Visual Studio.This applies to both SP2010 and SP2007 or General .NET. In Visual Studio, Go to Tools –> External Tools. Click on “Add” to add a tool, and put in the following values: Title: S&trong Name Command: Powershell.exe Arguments: -command "[System.Reflection.AssemblyName]::GetAssemblyName(\"$(TargetPath)\").FullName" Check “Use Output Window” Uncheck everything else – here’s how it should look - 3. That’s it, now in your project, Visit Tools –> Strong Name, and in the output window, itwill give you the assembly name like this –> SandBoxWebPartWithProxy, Version=1.0.0.0, Culture=neutral, PublicKeyToken=64b818b3ff69ccfa Read full article ....

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New Videos in the Tailspin Spyworks series live.

Weve posted a few new videos in the Tailspin Spyworks tutorial serials. Many more in the works ! http://www.asp.net/web-forms/fundamentals http://www.asp.net/aspnet-4/videos http://www.asp.net/aspnet-4/videos/tailspin-spyworks-display-the-product-list http://www.asp.net/aspnet-4/videos/tailspin-spyworks-display-per-product-details...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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General solution to solve different sports results in different languages

- by sq2

I currently have some code that checks if squash and tennis scores are valid, both in javascript and PHP. This results in 4 blocks of code existing, 2 languages * 2 sports, which does not scale well should any extra sports come around, or extra languages... How can one describe the valid scores of games via a settings/text file, so that each language can parse them and apply these rules. I'm stumped with the strange tie break situations in tennis should it reach 6-6 in a set, and also infinite play off in the final set should it reach 2 sets all. ie: tennis = { "format": [ { "name": "sets" "min": 3, "max": 5, "winby": 1 }, { "name": "games" "min": 6, "max": 7, "winby": 2 } ] } squash = { "format": [ { "name": "games" "min": 3, "max": 5, "winby": 1 }, { "name": "points" "min": 15, "max": 0, "winby": 2 } ] }

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Oracle Exalogic: Simple IT Operations, Great Application Experience

- by Michelle Kimihira

See a demo featuring Yoav Eilat, Director of Product Marketing. Yoav demonstrates how easy it is to deploy new applications and how administrators can manage the entire system from a single console on Exalogic. Click here to view. Additional Information Product Information on Oracle.com: Oracle Fusion Middleware, Oracle Exalogic Follow us on Twitter and Facebook Subscribe to our regular Fusion Middleware Newsletter

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