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• OBIEE 11.1.1 - (Updated) Best Practices Guide for Tuning Oracle® Business Intelligence Enterprise Edition (Whitepaper)

  - by Ahmed Awan

  Applies To: This whitepaper applies to OBIEE release 11.1.1.3, 11.1.1.5 and 11.1.1.6 Introduction: One of the most challenging aspects of performance tuning is knowing where to begin. To maximize Oracle® Business Intelligence Enterprise Edition performance, you need to monitor, analyze, and tune all the Fusion Middleware / BI components. This guide describes the tools that you can use to monitor performance and the techniques for optimizing the performance of Oracle® Business Intelligence Enterprise Edition components. Click to Download the OBIEE Infrastructure Tuning Whitepaper (Right click or option-click the link and choose "Save As..." to download this file) Disclaimer: All tuning information stated in this guide is only for orientation, every modification has to be tested and its impact should be monitored and analyzed. Before implementing any of the tuning settings, it is recommended to carry out end to end performance testing that will also include to obtain baseline performance data for the default configurations, make incremental changes to the tuning settings and then collect performance data. Otherwise it may worse the system performance.

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• Why does Chrome video performance substantially degrade after waking from suspend in 10.10?

  - by Grant Heaslip

  Note: For some more details, some of which may not be true given what I've figured out, see this post. When I first boot my computer, video performance (both native H.264 HTML5 in YouTube and Vimeo, and in Flash) in Chrome is perfectly reasonable. CPU usage stays slow, everything works correctly, and the video is silky-smooth. But for whatever reason, if I suspend my computer then wake it up, video performance plummets. Full screen HTML5 video is choppy at best, and full-screen Flash video basically brings my computer to its knees (I'm talking less than a frame a second, and a 5 second lead time to leave full-screen after hitting Esc). Restarting Chrome doesn't fix this — I need to completely restart my machine before performance goes back to normal. Video performance in other applications, such as Movie Player, doesn't seem to be affected at all by the suspend cycle — it's only Chrome. I'm using a Lenovo X201, with an Intel GMA HD graphics chipset, and Intel compnents all around (I don't need any proprietary drivers). This didn't happen in 10.04, and I haven't anything that I think would have caused this to happen. It's possible that a Chrome release could have caused this, but it seems less likely than a regression between 10.04 and 10.10. Any ideas? EDIT: In response Georg's comment, logging in and out doesn't fix it. Restarting Compiz or switching to Metacity (at least by using "compiz/metacity --replace & disown" — am I doing it right?) doesn't help (actually, it seemed to help somewhat with Flash once, but I haven't been able to reproduce this). I'm not sure about GDM — when I use "sudo restart gdm" I get kicked back to the Linux shell (?), which I have no idea how to get out of. Also, I want to make very clear that this isn't just a case of Flash sucking (it does,but that's beside the point). I"m seeing the same general problem with HTML5 videos, and Flash is performing better on my Nexus One than it does on my Core i5 laptop. There's something screwy going on with Chrome and/or 10.10.

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• Deployment Error: Silverlight 4.0 w/WCF RIA Services in ASP.NET MVC 2 App

  - by Dennis Ward

  I've got an MVC 2 App with an RIA Services link to a Silverlight Application. On my local machine, all is well, but when I deploy to Discount ASP servers, neither the MVC controller nor the WCF RIA services called from silverlight function: A silverlight datagrid gets a load error: System.ServiceModel.DomainServices.Client.DomainOperationException: Load operation failed for query... The remote server returned an error NotFound. In the MVC page where I had a simple table that worked prior to adding an EF model and DomainDataSource, I now get the error: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. This is very similar to an issue I had before, but after upgrading from the betas of WCF/Silverlight 4, but the fix I had added there doesn't seem to work any longer. The link for that issue is: SL4/MVC2/WCF RIA Services = Load Error I'm really struggling with deploying, and could use some help if anybody can shed any light on this. Thanks! Dennis

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• WCF, Timer Jobs, Web Service which is better ???

  - by kannan.ambadi

  I am working with a Web application, based on Asp.Net 3.5 and WSS 3.0 platform. Recenlty i've got a task as follows. Import bank statement using FTX - Desktop application and parse those statements into database in every 24 hours ie. i need to download bank statement with the help of a desktop application(which i can call by batch file). Then i have to go through each statement(text file) and convert those data into our database for future reference. As far as i know, .Net provides the following options to implement such a functionality. SharePoint Timer Jobs Web Services WCF Windows Services I would like to go for SharePoint Timer Jobs, but there are some plans to move whole application to Asp.net platform. I am interested with WCF since i haven't much experience with WCF applications, but not in a position to take final decision :) Which is the most suitable way for this kind of task? Please suggest.

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• why is there no interface file with silverlight enabled wcf services

  - by Ralph Shillington

  Using Visual Studio 2010 when creating a wcf service the template creates a class file, svc endpoint and an interface file. Why is it that when adding a silverlight-enabled wcf service they don't follow this pattern. As discussed here this seems like a bad idea. After adding the silverlight-enabled service, should one go back and incorporate the interface as discussed in the referenced article. If so, then would it not be as simple to start with a simple WCF service, bypassing the whole "silverlight-enabled" bits altogether.

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• Arguments of using WCF/OData as access layer instead of EF/L2S/nHibernate directly

  - by Carl Hörberg

  We develop mostly low traffic but highly specialized web applications. Normally we use L2S, EF or nHibernate as access layer and then throws Asp.Net MVC to it and in which for normal crud operations we query the ISession/DataContext directly but for more advanced functions/side effects we put it in a some kind of service layer. Now, i was think about publishing the data through OData (WCF Data Service) and query that from the controllers (or even from jQuery when the a good template engine shows up) and publish the service operations through a WCF service (or as custom methods on the WCF Data Service?). What advantages/disadvantages does this architecture poses? Do I gain something except higher complexity and latency? Better separations of concerns (or is it just a illusion)?

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• WCF VS. Sockets

  - by kite

  Hello, I would like to know which of WCF or .NET Sockets is the more efficient and the more recommended in a game developpment scenario. Here are the different parts of the game : -a client/server communication to play on the internet -peer to peer on local network. I would like to know which technology you would use on these parts (wcf on both, socket on both, wcf on one and socket on the other...) and why, if possible. The game involved doesn't require a high communication frequency (3-4 per second is enough). Thanks, KiTe

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• silverlight with WCF(get data through collections)

  - by Piyush

  in my silverlight page I am fetching the data through WCF WCF is returning an BusinessEntityCollection that is the collection of rows SqlParameter[] sqlParameter = new SqlParameter[]{new SqlParameter("@recordType",recordType)}; MenuEntity menuEntity; MenuEntityCollection menuEntityCollection = new MenuEntityCollection(); using (SqlDataReader sqlDataReader = SqlHelper.ExecuteReader(_ConnectionString,CommandType.StoredProcedure, StoredProcedures.GetMenus, sqlParameter)) { if (sqlDataReader.Read()) { menuEntity = new MenuEntity(); DataAccessHelper.GetEntity(sqlDataReader, menuEntity); menuEntityCollection.Add(menuEntity); } } return menuEntityCollection; -- in silverlight page when I am calling WCF there I am getting an error MenuEntity menuList = new MenuEntity(); menuList = e.Result; <-----error line error: Cannot implicitly convert type 'System.Collections.ObjectModel.ObservableCollection' to 'FastTrackSLUI.AdminServiceReference.MenuEntity'

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• WCF(HTTPS,UserName) calling by SilverLight

  - by Andrew Kalashnikov

  Hello colleagues. I've created wcf service with transport security over HTTPS. Also I use UserName authentication as described at http://msdn.microsoft.com/en-us/library/cc949025.aspx, so I can use my Membership,RoleProvider. When I work with this service with ASP.NET all is OK var client = new RegistratorClient(); client.ClientCredentials.UserName.UserName = ConfigurationManager.AppSettings["registratorLogin"]; client.ClientCredentials.UserName.Password = ConfigurationManager.AppSettings["registratorPassword"]; But at my SilverLight appliation I can't do the same. When I try setup credntials and call wcf I get standard browser window with username and password. When I insert it SL application works well, but this message is so annoyed. I can't use clientCredentialType="Basic" at my SL config. What should I do for silence calling my WCF. Big thanks

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• Creating WCF DataContracts dynamically from code

  - by Fredrik Tonn

  Given the fact that I have a fully dynamic object model, that is, I have no concrete classes defined anywhere in code, but I still want to be able to create WCF DataContracts for them so I can use them in operations. How can I achieve this? My concrete class "Entity" implements ICustomTypeDescriptor which is used to present the various properties to the outside world, but my expeimentation with WCF suggests that WCF does not care about ICustomTypeDescriptor. Is this correct or have I missed something? Is this possible? It cannot be so that the only way to create a DataContract is to actually have a concrete harcoded class, can it?

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• How to set WCF threads to schedual differently

  - by Gilad

  Hi, I'm running a winservice that has 2 main objectives. Execute/Handle exposed webmethods. Run Inner processes that consume allot of CPU. The problem is that when I execute many inner processes |(as tasks) that are queued to the threadpool or taskpool, the execution of the webmethods takes much more time as WCF also queues its executions to the same threadpool. This even happens when setting the inner processes task priority to lowest and setting the webmethods thread priority to heights. I hoped that Framework 4.0 would improve this, and they have, but still it takes quite allot of time for the system to handle the WCF queued tasks if the CPU is handling other inner tasks. Is it possible to change the Threadpool that WCF uses to a different one? Is it possible to manually change the task queue (global task queue, local task queue). Is it possible to manually handle 2 task queues that behave differently ? Any help in the subject would be appropriated. Gilad.

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• WCF host in windows service: cannot get wsdl

  - by michele

  Hi guys! i've a windows service that hosts a WCF service with basicHTTPBinding. In test everything goes right, when i deploy the win service on a Window Server 2003, service hosts correctly wcf, I print out endpoints in tracing, they're correct, but when i ask for wsdl using the address that service exposed (i.e. http://mybaseaddress/?wsdl) i get a dns error, i cannot get the page! Where i fail? I miss something? If i host the wcf with a console app, using the same config file, i can get the wsdl without problems! Thank you in advance Michele

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• WCF DataContracts and underlying data structures

  - by Xerx

  I am wondering what makes sense in relation to what objects to expose through a WCF service - should I add WCF Serialization specifications to my business entities or should I implement a converter that maps my business entities to the DataContracts that I want to expose through my WCF service? Right now I have entities on different levels: DataAccess, Business and Contract. I have converters in place that can map entities from DataAccess to Business and from Business to Contract and vice versa. Implementing and Maintaining those is time consuming and pretty tedious. What are best practices in relation to this? If I were using an OR/M such as NHibernate or Entity Framework should I be exposing the entities from the ORM directly or should I abstract them the same way I am doing now? Thanks in advance.

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• WCF Web Service chnage wsdl name and targetNamespace

  - by Graham

  All, I'm a little new to WCF over IIS but have done some ASMX web services before. My WCF service is up and running but the helper page generated by the web service for me has the default names, i.e. the page that says: You have created a service. To test this service, you will need to create a client and use it to call the service. You can do this using the svcutil.exe tool from the command line with the following syntax: svcutil.exe http://localhost:53456/ServicesHost.svc?wsdl In a standard ASMX site I would use method/class attributes to give the web service a name and a namespace. When I click on the link the WSDL has: <wsdl:definitions name="SearchServices" targetNamespace="http://tempuri.org/" i.e. not the WCF Service Contract Name and Namespace from my Interface. I assume the MEX is using some kind of default settings but I'd like to change them to be the correct names. How can I do this?

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• WCF RIA Services and RFCs

  - by Kottan

  I want (have) to write a Silverlight and (or) ASP.NET based webapplication with SAP in the backend (in other words, the datasource is no classical database) . The usage of Silverlight and ASP.NET is a precondition. Is it possible to use the WCF RIA Services (and Silverlight) where the data-source are RFCs from SAP ? Makes this sense ? If yes, how the pattern/architecture could be shortly described ? Or should I take other architectures into considerations (usage of plan WCF services, WCF data services,...) ?

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• WCF without NET 3.0

  - by Murat

  Hello there, Does anyone tell me if it's possible to use WCF without .NET 3.0? Our company develops a 3-tier client-server end-user solution based on .Remoting. One of the limitation of our project is using .NET 2.0. Unfortunately .NET 3.0 framework is too large to be included in our installation package and I don't know if MS license allows this. But WCF might helps us to drastically reduce our efforts in some tasks. Does anyone have a chance to use WCF from Mono? Thanks in advance -- Murat

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• Usage of WCF RIA Services, where the datasource isn't a classical (relational) database

  - by Kottan

  I want (have) to write a Silverlight and (or) ASP.NET based webapplication with SAP in the backend (in other words, the datasource is no classical database) . The usage of Silverlight and ASP.NET is a precondition. Is it possible to use the WCF RIA Services (and Silverlight) where the data-source are RFCs from SAP ? Makes this sense ? If yes, how the pattern/architecture could be shortly described ? Or should I take other architectures into considerations (usage of plain WCF services, WCF data services,...) ?

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• Self host WCF (Windows Communication Foundation) Ajax services

  - by Wayne Lo

  I am having trouble to understand how to expose the WCF services through Javascript. Here are what I found after days of research: Exposing WCF services through Javascript but not self host: http://msdn.microsoft.com/en-us/library/bb472488.aspx In this example, it requires the creation of a .svc file <%@ServiceHost language="c#" Debug="true" Service="Microsoft.Samples.XmlAjaxService.CalculatorService" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %> Self host WCF Ajax services but not exposing the services through Javascript. http://msdn.microsoft.com/en-us/library/bb943471%28v=VS.100%29.aspx Please help. Thanks.

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• Keep user connected with WCF

  - by Frank

  Hi, Context : I would like to create WCF Service that can be consumed by an ASP.NET web app and an iphone application. My goal : Create an SOA architecture. My problem : How "keep the user connected" on the WCF service? I tried asp.net membership provider with wcf and that works fine. But the problem is that I have to give username/password for each call. What can I do to resolve this problem? What's the best way to solve this kind of problem? Possible solution after googlising : Use Windows Identity Foundation. Thank you, Frank

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• Authenticating wcf service

  - by Muhammad Jamal Shaikh

  hi , i want to implement a web service which is both in java and .net.but i will first create a wcf service and later convert the code to java . for securing the webservice , i have this in my mind. i shall be implementing asp.net form authentication type of stuff . i intent to sent a token to the client on providing valid userID and password to the login method. in return i would send a token. on all other service operations i shall check the token . Now i have a wcf client and a wcf service . what should be the shortest way forward ?should i use soap auth header to send the user ID and password and how should the token be transported ( in which field ? http or soap's ?) . P.S: of course i shall enable ssl later.

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• HOWTO: Deserialize WCF message using OperationContract

  - by Stefan

  Hi, I succeeded in building a WCF client generated by svcutil.exe from the WSDL. Using the generated client proxy class I can call the web service of an external service supplier. I also succeeded in coding a message inspector, as I need to log both raw XML request and response as full SOAP message to the database. For an emergency szenario I also need to be able to "import" a raw XML response. I found many hints on using XMLSerializer or deserializing WCF messages based on the message contract. But how can I deserialize a raw XML response based on an operation contract? For a first test I use one of the logged raw responses, save it to a file and now try to deserialize it to the response type as generated in the client proxy. Somehow I must succeed in calling DeserializeReply() from class ClientOperation. But how to get there? I happily acced any help as I'm quite new to WCF... TIA, Stefan

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• Implementing an interface using an asynchronous WCF service?

  - by John K.

  Hello, I am trying to figure out if it is possible to implement a .NET interface, where the interface method has to return something and you are implementing that particular interface method with an asynchronous WCF service? Hopefully you should already see the issue I am encountering. Here is the interface: public interface IDataService { IDataServiceResponse SendDataRequest(); } IDataServiceResponse is supposed to represent a simple container that holds the result of my asynchronous WCF callback. Here is the code snippet where I am implementing the interface method, SendDataRequest() public IDataServiceResponse SendDataRequest() { InitializeDataServiceParameters(); // Call the web service asynchronously, here.... _client.BeginQueryJobs(_parameters, DataServiceQueryCallBack, _client); // How do I return _dataServiceResponse, if I am calling the WCF service // asynchronously?? return _dataServiceResponse; } And the callback method signature: void DataServiceQueryCallBack(IAsyncResult result) { // ... implementation code } Thanks in advance, John

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• WCF configuration setting information at a glance

  - by Newbie

  Is there any site from where I can get the most of the information about WCF configuration settings e.g. keyEntropyMode,maxStatefulNegotiations,sessionKeyRolloverInterval, negotiationTimeout etc. I have started recently working in wcf but is facing many troubles in understanding the terms. There are to be honest huge. And whenever I get stuck, it takes a long time for me to solve it (searching and searching in google and after spending sometime hours I may get the solution). Henceforth, I think it is better to know if not all astleast some of the terms and their usage and what they means. It would be great help if anyone can point such a link. I searched in the net with " wcf configuration file elements" but with not much luck. Thanks

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• WCF service and Identity in configuration.

  - by pdiddy

  What is the purpose of this Identify that sometime I find in the generated in the configuration when adding a service reference in the a client project. I have this wcf service running under local system account. It looks like I don't need to specify this identity in the client configuration. But if I run the wcf service under a specific account. I have to set the identity userprincipalname to the account the service is running under or else my client can't communicate at all with the wcf service. Can someone shed more light on this configuration? Maybe some articles on the net?

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• How to correctly open WCF service

  - by Sergej Andrejev

  Hi there, I'm using WCF client like this... var client = new TestClient(); try { response = service.Operation(request); } finally { try { if (client.State != CommunicationState.Faulted) client.Close(); } catch (Exception) { client.Abort(); } } but from time to time I get 500 HTTP error which is the only answer I get for next 15 minutes, then everything is back to normal for 15 minutes and so on. I know there is some load balancing stuff going on service side but guys there can't find any problems with it. That's why I started wondering am I using WCF service correctly. I already made a mistake once when I was using "using" to close service connection and I'm afraid I doing something wrong again. So can anybody say whether my way of calling WCF service is correct or not in all (event the most rare) circumstances?

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