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  • Amazon Web Services : Fault tolerant solution

    - by Algorist
    Hi, I am using Boto library to write scripts for automating our jobs on AWS. My script actually starts a hadoop cluster using cloudera scripts and then does some customization. I am having a problem with retries. Seems like very command in my script fails once couple of days. I started adding retry to all the commands, but then the code is very clumsy and difficult to maintain. what do people do in general. Thank you Bala

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  • SQL Server Reporting Services proxy timeout (ASP.NET)

    - by Philip
    Morning, We are using SSRS (2005) and have a ASP.NET frontend using the SSRS WebControl. I've boiled the problem down the time it takes for one particular report to be generated is greater than the timeout on the proxy server. It looks like the way the SSRS web control tries to do things is by performing an HTTP request for the report, however the problem with this is the request can timeout potentially before the report has generated. Looking at the HTTP traffic the response is a 504 (gateway timeout). Is there a way to increase the timeout or change SSRS WebControl to use more robust polling mechanism (which isn't dependant on the timeout of the HTTP request). I could be wrong but I don't think ServerReport.Timeout property would resolve the issue we are seeing? Any thoughts? Philip

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  • List problem in Reporting Services 2005

    - by Kris
    Hi, I have a problem with a list in srss 2005. The list is grouping too much information and I dont know how to un-group it. I made a picture to show it. But because I'm new, I can only show it with this link: http://img32.imageshack.us/img32/6058/listproblem.gif So the list is also grouping the weeks, but that is not what I would like. Does anyone know how to change this? (in the designer view) Thanks in advance, Kris

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  • iPhone SDK / Core Data usage scenario, similar to GAE data store?

    - by boliva
    Hi all, I am currently rewriting a map based App which I wrote in the past, specifically for 2.2.1 devices. Originally I wrote it to make use of SQLite databases but I would like to try and migrate it over Core Data, now that it's available on 3.X (for which I am rewriting to). I am fairly experienced in iPhone/Obj-C development, SQL and server backend technologies, but I have never had the chance to work with Core Data so IDK really if it's the appropiate tool for what I am trying to accomplish. The App works on a limited area in a map over which there are about 4000 placemarks, with different kinds of icons and sizes. Of course not all 4000 placemarks are shown at once but only those currently visible in the map viewport, and depending on the zoom level. What I am doing right now is, after the user moves the map in any way (panning or zooming) I am requesting from the backend server the required information for the placemarks that would be visible given the viewport coordinates boundaries and zoom level, however the process isn't as smooth as I'd like (the backend is sending its response in XML and I am compressing it using gzip), it takes anywhere from 1 to 3 seconds to update the display of the placemarks after the user ends moving the map. What I would like to do is to prefetch all the placemarks data at the App launch and use it all through the app life time - I don't mind storing it for later use because the data should be dynamic. The way I would do it right now is, after retrieving all the data, to store it on an SQLite db which I would query later, whenever the user moves the map, to return only the placemarks inside the viewport coordinate boundaries and specific to a given zoom level. Now, the question itself is, if is it possible to use some more 'native', object driven way to carry this queries process, which got me thinking about Core Data and if it is in any way similar to what Google App Engine offers through its datastore where you can fetch a number of objects from the backend given a certain query or criteria, without resorting to an SQL query itself. Like I said before I don't have any experience on Core Data but I have a pretty deep understanding of Obj-C and iPhone development, as well as SQL databases. Any guides on how to achieve what I'm trying (if possible at all) would be greatly appreciated.

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  • How to programmatically bind to a Core Data model?

    - by Dave Gallagher
    Hello. I have a Core Data model, and was wondering if you know how to create a binding to an Entity, programmatically? Normally you use bind:toObject:withKeyPath:options: to create a binding. But I'm having a little difficulty getting this to work with Core Data, and couldn't find anything in Apple's docs regarding doing this programmatically. The Core Data model is simple: An Entity called Book An Attribute of Book called author (NSString) I have an object called BookController. It looks like so: @interface BookController : NSObject { NSString *anAuthor; } @property (nonatomic, retain) NSString *anAuthor; // @synthesize anAuthor; inside @implementation I'd like to bind anAuthor inside BookController, to author inside a Book entity. This is how I'm attempting to wrongly do it (it partially works): // A custom class I made, providing an interface to the Core Data database CoreData *db = [[CoreData alloc] init]; // Creating a Book entity, saving it [db addMocObject:@"Book"]; [db saveMoc]; // Fetching the Book entity we just created NSArray *books = [db fetchObjectsForEntity:@"Book" withPredicate:nil withSortDescriptors:nil]; NSManagedObject *book = [books objectAtIndex:0]; // Creating the binding BookController *bookController = [[BookController alloc] init]; [bookController bind:@"anAuthor" toObject:book withKeyPath:@"author" options:nil]; // Manipulating the binding [bookController setAnAuthor:@"Bill Gates"]; Now, when updating from the perspective of bookController, things don't work quite right: // Testing the binding from the bookController's perspective [bookController setAnAuthor:@"Bill Gates"]; // Prints: "bookController's anAuthor: Bill Gates" NSLog(@"bookController's anAuthor: %@", [bookController anAuthor]); // OK! // ERROR HERE - Prints: "bookController's anAuthor: (null)" NSLog(@"Book's author: %@", [book valueForKey:@"author"]); // DOES NOT WORK! :( When updating from the perspective of the Book entity, things work fine: // ------------------------------ // Testing the binding from the Book's (Entity) perspective (this works perfect) [book setValue:@"Steve Jobs" forKey:@"author"]; // Prints: "bookController's anAuthor: Steve Jobs" NSLog(@"bookController's anAuthor: %@", [bookController anAuthor]); // OK! // Prints: "bookController's anAuthor: Steve Jobs" NSLog(@"Book's author: %@", [book valueForKey:@"author"]); // OK! It appears that the binding is partially working. I can update it on the side of the Model and it propagates up to the Controller via KVO, but if I update it on the side of the Controller, it doesn't trickle down to the Model via KVC. Any idea on what I'm doing wrong? Thanks so much for looking! :)

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  • WCF Data Services - neither .Expand or .LoadProperty seems to do what I need

    - by TomK
    I am building a school management app where they track student tardiness and absences. I've got three entities to help me in this. A Students entity (first name, last name, ID, etc.); a SystemAbsenceTypes entity with SystemAbsenceTypeID values for Late, Absent-with-Reason, Absent-without-Reason; and a cross-reference table called StudentAbsences (matching the student IDs with the absence-type ID, plus a date, and a Notes field). What I want to do is query my entities for a given student, and then add up the number of each kind of Absence, for a given date range. I prepare my currentStudent object without a problem, then I do this... Me.Data.LoadProperty(currentStudent, "StudentAbsences") 'Loads the cross-ref data lblDaysLate.Text = (From ab In currentStudent.StudentAbsences Where ab.SystemAbsenceTypes.SystemAbsenceTypeID = Common.enuStudentAbsenceTypes.Late).Count.ToString ...and this second line fails, complaining it has no value for an object. I presume the problem is that while it DOES see that there are (let's say) four absences for the currentStudent (ie, currentStudent.StudentAbsences.Count = 4) -- it can't yet "peer into" each one of the absences to look at its type. How do I use .Expand or .LoadProperty to make this happen? I tried fiddling with .LoadProperty but it doesn't take a two-level syntax like so... Data.LoadProperty(currentStudent,"StudentAbsences.SystemAbsenceTypeID") or the like. Is there some other technique?

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  • Discovery of web services using Python

    - by chrissygormley
    Hello, I have several devices on a network. I am trying to use a library to discover the presence and itentity of these devices using Python script, the devices all have a web service. My question is, are there any modules that would help me with this problem as the only module I have found is ws-discovery for Python? And if this is the only module does anyone have any example Python script using ws-discovery? Thanks for any help.

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  • Usehttpget for script methods in config of asp.net web services

    - by Ajay
    Is there a way to put the usehttpget true/false option for scriptmethods in web.config? I see that even the scriptmethod annotations are placed inline with the code. Is there a way to move this to config as well? Ive seen usehttpget/post option in web.config for webservices but I need the same thing applicable for scriptservices.

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  • Reporting Services Expression

    - by Alex
    I'm trying to set the Hidden-property of a Textbox based on this expression: =IIf(IsNothing(Parameters!customer_numbers.Value) AND IsNothing(Parameters!country_codes.Value),False,True) Error: "Argument not specified for parameter 'FalsePart' of Public Function IIf(Expression As Boolean, TruePart As Object, FalsePart As Object) As Object" I'm a jScript/C# guy and not used to this pseudo-VB language. What is wrong? Regards Alex

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  • How do I do client-side validation in WPF using WCF RIA Services

    - by lsb
    Hi! I've created a WCF RIA Service that I'd like to use with a WPF application. I've added several System.ComponentModel.DataAnnotations validation rules on the entities meta-data, all which work great on the server when I call .SubmitChanges(changeSet) from the client. I'd also like to validate my entities on the client side before I sumbit my changes to the server but I have no idea how to do so. Any help in this regard would be greatly appreciated! Thanks....

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  • Silverlight (RIA Services) spontaneous culture changing

    - by Marc Wittke
    My RIA enabled Silverlight Application is setting the thread culture in the App constructor (this is absolutley okay since it is an intranet application and will never ever be used by someone who is not german): public App() { InitializeComponent(); Thread.CurrentThread.CurrentCulture = new CultureInfo("de-DE"); } It does what it should, the DataForms are displaying datetime values in german notation. BUT: it is spontaneously changing to en-US notation when navigating between items in the data source that is bound to the DataForm. Why?

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  • SQL Server Reporting Services: creating a Pareto chart

    - by william
    I am trying to create a Pareto Chart in SQL Server Reporting Service 2005. I created a chart, but having difficulties in trying to get my cumulative(line) to display. I listed my values below. =SUM(Fields!Total_SR.Value)/MAX(Fields!Total_SR.Value, "SeriesGroup")*0.75 cumulative value: =RunningValue(Fields!Total_SR, Sum, "SeriesGroup") / Sum(Fields!Total_SR, "SeriesGroup") I am able to get the Bar to display. This is the instructions I used: http://msdn.microsoft.com/en-us/library/aa964128(SQL.90).aspx

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  • RESTful services and update operations

    - by Igor Brejc
    I know REST is meant to be resource-oriented, which roughly translates to CRUD operations on these resources using standard HTTP methods. But what I just wanted to update a part of a resource? For example, let's say I have Payment resource and I wanted to mark its status as "paid". I don't want to POST the whole Payment object through HTTP (sometimes I don't even have all the data). What would be the RESTful way of doing this? I've seen that Twitter uses the following approach for updating Twitter statuses: http://api.twitter.com/1/statuses/update.xml?status=playing with cURL and the Twitter API Is this approach in "the spirit" of REST? UPDATE: PUT - POST Some links I found in the meantime: PUT or POST: The REST of the Story PUT is not UPDATE PATCH Method for HTTP

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  • oData/ADO.NET Data Services using LINQ-to-SQL with a decryption layer

    - by Program.X
    I have written an application using LINQ-to-SQL that submits a web form into a database. I absact the LINQ-to-SQL away using a Repository pattern. This repository has the basic methods: Get(), Save(), etc. As a development of the project, I needed to encrypt certain fields in the form. This was trivial, as I just added the encryption calls to the Get(), Save() methods in the Repository. Now, I want to put an oData layer over it, to allow RESTful extraction from MS Excel 2010 (when it comes out). I have this working, after a few stumbles on useless error messages, etc. However, obviously, those encrypted fields are still encrypted. My repository pattern would have decrypted these for me. As far as I know, I have to directly bind my oData service to the LINQ-to-SQL context for the schema, etc. to work - unless I enter a whole world of pain (any URLs appreciated). Is there a way I can insert my encryption/decryption layer into the request so decryption is done "on the fly"? I looked at the OnStartProcessingRequest() overload of DataService but this doesn't seem that useful.

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  • Exceptions and web services

    - by Schildmeijer
    Im using the standard java ws implementation shipped with e.g. java6 (javax.jws.*). I have the following: import javax.jws.*; @WebService(name="Widget") public interface Widget { @WebMethod public @WebResult String getGadget(@WebParam(name = "id") long id) throw MyOwnException; } Is this possible? Do I have to annotate MyOwnException with e.g the @WebFault annotation? During my initial tests I also noticed that, on the client side, the autogenerated MyOwnException was renamed to MyOwnException_Exception and wrapped the "original" MyOwnException. Or if this is a bad idea, are there any recommended Exceptions to throw from a webservice like this?

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  • Web services that implement the same interface

    - by zachary
    My friend build a web service in java I build one in .net I want them to implement the same interface then in my program change the web.config to point to one or the other. In my mind this would be done by implementing the same interface. Not sure how it would actually be done...

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  • Forcing Spring web services to add the xsd namespace to the response

    - by David Rabinowitz
    I'm using the Spring WS version 1.5.8. My response looks like this: <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"> <SOAP-ENV:Header/> <SOAP-ENV:Body> ... </SOAP-ENV:Body> </SOAP-ENV:Envelope> However, my client (whom I integrate with) requires that I will add more namespace declerations in order for the parsing to succeed: <?xml version="1.0" encoding="UTF-8"?> <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <soapenv:Body> ... </soapenv:Body> </soapenv:Envelope> How can I do it?

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