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  • Application development : method to manage backgound process

    - by Simon Dubois
    I am developing an application with different behavior depending on the arguments : - "-config" starts a Gtk window to change options, start and close the daemon. - "-daemon" starts a background process that does something every X minutes. I already know how to use fork/system/exec etc... But I would like to know the main logic of such application to : - restart or refresh the daemon when configuration change. - keep only one instance of the daemon. I have red that killing the daemon to restart it is not a clean way to do. How other applications do ? (ubuntuone, weather forecast, rss feed working with notification area) Thanks for your help. PS : I don't want to create a system-wide daemon, just a user application with a background process.

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  • .net Email Template engine...

    - by alex
    I'm looking to create emails, mainly HTML, based on templates - I'd really like to do something like: Set up my template, as an HTML (or similar) file Include tags, that are then replaced with specific data (kind of like mail-merge....) I've seen this: http://www.bitethebullet.co.uk/EmailTemplateFramework/tabid/58/Default.aspx From searching on stack overflow, i understand nVelocity might be another option? But i can't find any examples to do what i want to do... Any other suggestions?

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  • Guaranteed Restore Points as Fallback Method

    - by Mike Dietrich
    Thanks to the great audience yesterday in the Upgrade & Migration Workshop in Utrecht. That was really fun and I was amazed by our new facilities (and the  "wellness" lights surrounding the plenum room's walls). And another reason why I like to do these workshops is that often I learn new things from you So credits here to Rick van  Ek who has highlighted the following topic to me. Yesterday (and in some previous workshops) I did mention during the discussion about Fallback Strategies that you'll have to switch on Flashback Database beforehand to create a guaranteed restore point in case you'll encounter an issue during the database upgrade. I knew that we've made it possible since Oracle Database 11.2 to switch Flashback Database on without taking the database into MOUNT status (you could switch it off anyway while the database is open before in all releases). But before Oracle Database 11.2 that did require MOUNT status. SQL> create restore point rp1 guarantee flashback database ; create restore point rp1 guarantee flashback database * ERROR at line 1: ORA-38784: Cannot create restore point 'RP1'. ORA-38787: Creating the first guaranteed restore point requires mount mode when flashback database is off. But Rick did mention that I won't need to switch Flashback Database On to create a guaranteed restore point. And he's right - in older releases I would have had to go into MOUNT state to define the restore point which meant to restart the database. But in 11.2 that's no necessary anymore. And the same will apply when you upgrade your pre-11.2 database (e.g. an Oracle Database 10.2.0.4) to Oracle Database 11.2. As soon as you start your "old" not-yet-upgraded database in your 11.2 environment with STARTUP UPGRADE you can define a guaranteed restore point. If you tail the alert.log you'll see that the database will start the RVWR (Recovery Writer) background process - you'll just have to make sure that you'd define the values for db_recovery_file_dest_size and db_recovery_file_dest. SQL> startup upgrade ORACLE instance started. Total System Global Area  417546240 bytes Fixed Size                  2228944 bytes Variable Size             134221104 bytes Database Buffers          272629760 bytes Redo Buffers                8466432 bytes Database mounted. Database opened. SQL> create restore point grpt guarantee flashback database; Restore point created.SQL> drop restore point grpt; And don't forget to drop that restore point the sooner or later as it is guaranteed - and will fill up your Fast Recovery Area pretty quickly Just on the side: in any case archivelog mode is required if you'd like to work with restore points. - Mike

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  • OOP private method parameters coding style

    - by Jake
    After coding for many years as a solo programmer, I have come to feel that most of the time there are many benefits to write private member functions with all of the used member variables included in the parameter list, especially development stage. This allow me to check at one look what member variables are used and also allow me to supply other values for tests and debugging. Also, a change in code by removing a particular member variable can break many functions. In this case however, the private function remains isolated am I can still call it using other values without fixing the function. Is this a bad idea afterall, especially in a team environment? Is it like redundant or confusing, or are there better ways?

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  • Best method to do A B testing across to subdomains

    - by Lior
    I want to do an A B test of an entire site for a new design and UX with only slight changes in content (a big brand site that has good Google rankings for many generic keywords. My idea of implementation is doing a 302 redirect to the new version (placing it on www1 subdomain) and allowing only user agents of known browsers to pass. The test version will have disallow all in the robots text. Will Google treat this favorably or do I have to use Google Website Optimizer (which will give me tracking headaches)?

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  • Enemy Spawning method in a Top-Down Shooter

    - by Chris Waters
    I'm working on a top-down shooter akin to DoDonPachi, Ikaruga, etc. The camera movement through the world is handled automatically with the player able to move inside of the camera's visible region. Along the way, enemies are scripted to spawn at particular points along the path. While this sounds straightforward, I could see two ways to define these points: Camera's position: 'trigger' spawning as the camera passes by the points Time along path: "30 seconds in, spawn 2 enemies" In both cases, the camera-relative positions would be defined as well as the behavior of the enemy. The way I see it, the way you define these points will directly affect how the 'level editor', or what have you, will work. Would there be any benefits of one approach over the other?

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  • Drawing 2D Grid in 3D View - Need help with method

    - by Deukalion
    I'm trying to draw a simple 2D grid for an editor, to able to navigate more clearly around the 3D space, but I can't render it: Grid2D class, creates a grid of a certain size at a location and should just draw lines. public class Grid2D : IShape { private VertexPositionColor[] _vertices; private Vector2 _size; private Vector3 _location; private int _faces; public Grid2D(Vector2 size, Vector3 location, Color color) { float x = 0, y = 0; if (size.X < 1f) { size.X = 1f; } if (size.Y < 1f) { size.Y = 1f; } _size = size; _location = location; List<VertexPositionColor> vertices = new List<VertexPositionColor>(); _faces = 0; for (y = -size.Y; y <= size.Y; y++) { vertices.Add(new VertexPositionColor(location + new Vector3(-size.X, y, 0), color)); vertices.Add(new VertexPositionColor(location + new Vector3(size.X, y, 0), color)); _faces++; } for (x = -size.X; x <= size.X; x++) { vertices.Add(new VertexPositionColor(location + new Vector3(x, -size.Y, 0), color)); vertices.Add(new VertexPositionColor(location + new Vector3(x, size.Y, 0), color)); _faces++; } _vertices = vertices.ToArray(); } public void Render(GraphicsDevice device) { device.DrawUserPrimitives<VertexPositionColor>(PrimitiveType.LineList, _vertices, 0, _faces); } } Like this: +----+----+----+----+ | | | | | +----+----+----+----+ | | | | | +----+----+----+----+ | | | | | +----+----+----+----+ | | | | | +----+----+----+----+ Anyone knows what I'm doing wrong? If I add a Shape without texture, it's set automatically to VertexColorEnabled and TextureEnabled = false. This is how I render it: foreach (RenderObject render in _renderObjects) { render.Effect.Projection = projection; render.Effect.View = view; render.Effect.World = world; foreach (EffectPass pass in render.Effect.CurrentTechnique.Passes) { pass.Apply(); try { // Could be a Grid2D render.Shape.Render(_device); } catch { throw; } } } Exception is thrown: The current vertex shader declaration does not include all the elements required by the current Vertex Shader. Normal0 is missing. Simply put, I can't figure out how to draw a few lines. I want to draw them one at a time and I guess that's the problem I haven't figured out, and even when I tried rendering vertices[i], vertices[i+1] and primitiveCount = 1, vertices = 2, and so on it didn't work either. Any suggestions?

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  • Private Cloud: Putting some method behind the madness

    - by Sudip Datta
    Finally, I decided to join the blogging community. And what could be a better time to start than the week after OpenWorld 2012. 50K+ attendees, demonstrations, speaker sessions and a whole lot of buzz on Oracle Cloud..It was raining clouds in this year's Openworld. I am not here to write about Oracle's cloud strategy in general, but on Enterprise Manager's cloud management capabilities. This year's Openworld was the first after we announced the 12c Cloud Control and we were happy to share the stage with quite a few early adopters. Stay tuned for videos from our customers and partners, I will post them as they get published. I met a number of platform administrators in Oracle-DBAs, Middleware Admins, SOA Admins...The cloud has affected them all, at least to the point where it beckoned more than just curiosity..Most IT infrastructure are already heavily virtualized (on VMWare and on others including Oracle VM), and some would claim they are already on “cloud” (at least their Sysadmins told them so). But none of them were confident of the benefits because their pain points continued to grow.. Isn't cloud supposed to ease those? Instead, they were chasing hundreds of databases running on hundreds of VMs, often with as much certainty propounded by Heisenberg. What happened to the age-old IT discipline around administration, compliance, configuration management? VMs are great for what they are. I personally think they have opened the doors to new approaches in which an application stack gets provisioned and updated. In fact, Enterprise Manager 12c is possibly the only tool out there that can provision full-fledged application as VM Assemblies. In this year's Openworld, customers talked on how they provisioned RAC and Siebel assemblies, which as the techies out there know, are not trivial (hearing provisioning time for Siebel down from weeks to hours was gratifying indeed). However, I do have an issue with a "one-size fits all" approach to cloud. In a week's span, I met several personas: Project owners requiring an EC2 like VM instance for their projects Admins needing the same for Sparc-Solaris. DBAs requiring dedicated databases for new projects APEX Developers needing just a ready-to-consume schema as a service Java Developers looking for a runtime platform QA engineers needing a fast clone of their production environment If you drill down further, you will end up peeling more layers of the details. For example, the requirements for Load testing and Functional testing are very different. For Load testing the test environment should ideally be the same as the production. You shouldn't run production on Exadata and load test on a VM; they will just not be good representations of one another. For Functional testing it does not possibly matter. DBAs seem to be at the worst affected of the lot. It seems they have been asked to choose between agile provisioning and  faster runtime performance. And in some cases, it is really a Hobson's choice, because their infrastructure provider made no distinction between the OLTP application and the Virtual desktop! Sad indeed. When one looks at the portfolio of services that we already offer (vanilla IaaS, VM Assembly based PaaS, DBaaS) or have announced (Java PaaS, Instant Cloning, Schema-aaS), one can possibly think that we are trying to be the "renaissance man" ! Well I would have possibly digested that had it not been for the various personas that I described above. Getting the use cases right is very important for an application such as cloud management. We iterate and iterate over these over and over again and re-validate them in CABs (Customer Advisory Boards). We consider over the major aspects of tenancy: service placement, resource isolation (can a tenant execute an expensive SQL and run away with all the resources), quota and security. We, in Engineering, keep reminding ourselves that we are dealing with enterprise clouds. We owe it to our customer base ! In the coming posts, I will drill down more into each of the services. In the meanwhile, here are some collateral and  demos for starters with EM 12c. http://www.oracle.com/technetwork/oem/cloud-mgmt/index.html Sudip Datta The views expressed here are my own and do not necessarily reflect the views of Oracle. Stay Connected: Twitter | Facebook | YouTube | Linkedin | Newsletter --

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  • Trouble using Ray.Intersect method on bounding boxes in a 2D XNA game

    - by getsauce
    I am trying to use a ray and bounding box to determine if a box is between the player and the mouse pointer in 2D space. When I try testing the code, the collision will return true when pointed at the box but it also returns true under other circumstances where it shouldn't. For instance. If I have a player on the left and a box directly to the right, I can put the mouse pointer a few hundred pixels above the box or a few hundred below and it will still return true. Also, I can put my mouse pointer to the left of the player and in a certain area it will still return true. Does anyone have any idea what might cause this? I have left out definitions for some of my members and properties just to make this code sample easier to read. The position property is just a Vector2 for where each object is located. ray = new Ray(new Vector3(player.Position, 0), new Vector3(mouse.Position, 0); box = new BoundingBox(new Vector3(box.Position, 0), new Vector3( new Vector2(box.Position + box.Width, box.Position + box.Height), 0); if (ray.Intersects(box) != null) collision = true; else collision = false;

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  • How to get Site Template Back?

    - by asher
    Hi Everybody, I have saved a site as tempalte (i.e. MyMarketing.stp) and added to sharepoint server using stsadm addtemplate command and after few days lost MyMarketing.stp file. Now it is available for creating top level sites as well. I want to get this site template back as MyMarketing.stp file. Is it possible to extract it from the server as MyMarketing.stp file? Thanks and in advance! Regards, Asher

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  • When to use each user research method

    - by user12277104
    There are a lot of user research methods out there, but sometimes we get stuck in a rut, conducting all formative usability testing before coding, or running surveys to gather satisfaction data. I'll be the first to admit that it happens to me, but to get out of a rut, it just takes a minute to look at where I am in the design & development cycle, what kind(s) of data I need, and what methods are available to me. We need reminders, or refreshers, every once in a while. One tool I've found useful is a graphic organizer that I created many years ago. It's been through several revisions, as I've adapted it to the product cycles of the places I've worked, changed my mind about how to categorize it, and added methods that I've used or created over time. I shared a version of this table at the 2012 International UPA conference, and I was contacted by someone yesterday who wanted to use it in a university course on user-center design. I was flattered at the the thought, but embarrassed, because I was sure it needed updating -- that was a year ago, after all. But I opened it today, and really, there's not much I'd change -- sure, I could add some nuance regarding what types of formative testing, such as modality (remote, unmoderated remote, or in-person) or flavor of testing (RITE, RITE-Krug, comparative, performance), but I think it's pretty much ok as is. Click on the image below, to get the full-size PDF. And whether it's entirely "right" or "wrong" isn't the whole value of looking at these methods across the product lifecycle. The real value lies in the reminder that I have options. And what those options are change as the field changes, so while I don't expect this graphic to have an eternal shelf life, it's still ok a year after I last updated it. That said, if you find something missing or out of place, let me know :) 

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  • Execute method with Action<T> argument using Reflection

    - by JGr
    How can i create a Action method to use as a argument to the following function? public void When(Action<T> action) { if (internalValue != null) action(internalValue); } I have the MethodInfo on the method, and the parameter type like so: var methods = value.GetType().GetMethods(); MethodInfo mInfo = methods.First(method => method.Name == "When"); Type parameterType = (mInfo.GetParameters()[0]).ParameterType; But after that i have no idea how to make the actual Action method to pass as argument, i also do not know how to define the Action method body.

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  • Edit comment template in Visual Studio

    - by Patrick
    I have poked around and getting the feeling that it isn't possible, however I was wondering if anyone knew how to edit the code comment templates for C# in VS 2010. I was able to change the class file template so it would seem like the ability it there to do it manually, but I have no idea where MS would stick the file. Any insight would be great, patrick

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  • Filling own template files

    - by Azat
    What is the best way to fill a template file with variables, which are collected from a Windows Form or Web Page. I want to create a wizard program that collects some data from user, for instance, reportname, reporttype, etc. and I need to create then some xml files (templates) with these variables inserted.

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  • image button template?

    - by Rev
    Hi I want Image button with two state(normal , mouse over). that button must change image with Mouse Over event trigger automatically. this image button must be a user control. Also i want to set image for each state form code in which form i use that user control. Solution is using a template with "Value Converter" but i don't know how?

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  • ASP.NET UpdateProgress template does not disapper when panel in UpdatePanel has display set to none

    - by Greg Balajewicz
    I am using very simple code where I have a update panel with some panels inside and a submit button. On submit, i hide one of the panels using this code: panel.Style.Add("display", "none"); I am also using a UpdateProgress which works great in all but this case. When i set the display to none using this code, the UpdateProgress template does not disappear! remove the line, all is well .... No idea why...

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  • Problem in calling a method recursively in nodejs mongodb [closed]

    - by Nilesh
    I am trying to create a tree using nodejs and mongodb.Wanted to show a path of a particulr node from the root.So I am finding the destination path and looping back to its parent iteratively until the root.So this is the snippet I am using which results in infinite looping articleProvider.finditsparent(t,function(error,tap){ if(tap[0].parent=='null') { t=(tap[0].parent); console.log(n); } else { n.push(tap[0].parent); console.log(tap[0].parent); t=(tap[0].parent); res.send(n); } }); res.send(n); }); How should I get rid of this problem?Is there any way to call it recursively?

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  • advantage and disadvantage of smarty template

    - by Bharanikumar
    Hi , New to smarty , Why people's showing interest in framework , What are the advantages in that , also lot of people little bit avoiding template what is the reason , What is the real reason people choosing the smarty , How much really smarty best for web development , Regards Bharanikumar

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  • Modelling multiple simultaneous states

    - by James P.
    How can you go about modelling an object that can have multiple simultaneous states? For example, you could have a person that's waiting for a bus. That's one state. But they could also be reading a newspaper while waiting for the bus. Furthermore, they could be thinking about something while reading the newspaper. They could also be sniffing their nose because they have a cold. That's a four states in all taking place at the same time. Obviously using booleans would be tedious and unflexible. Also, a conventional state pattern would mean that states are exclusive and can't be simultaneous in nature. The only thing I can think of is a State pattern combined with a Composite. Would this do or is there a way of taking things further?

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  • RDoc template customization

    - by ximus
    Hi, how can I change my default RDoc template for my gem environment. I'd like my gem server to look like this RDoc: http://getcloudkit.com/api/ and I've seen that design around so this shouldn't be so difficult.

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  • Asynch a synchronous method with await async

    - by Sahil Malik
    SharePoint, WCF and Azure Trainings: more information Stock this in “bag of tricks”, but very frequently we run into APIs that do not offer Asynch methods.But between C# ‘s amazing set of features, and asynch await keywords, there is a lot you can do. For instance, consider this code - Read full article ....

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  • Best Method/Library For Remote Authentication

    - by Mike
    I have a web app that has a REST API interface: http://api.example.com/core that uses API Keys and domain specific keys (key has to be used on the specified domain). I then will have several client sites with ajax forms where we will require users to sign in before being able to submit the form. This form will add data to a table, and submit an email to several recipients along with checking credentials. This form will use an ajax submit to our REST API. All Communication to/from the API is over SSL Ideal Flow: Visitor Fills Form Out -> Enters User/pass -> Submits Form -> ajax request to REST API -> API Verifies credentials -> does CRUD -> sends emails -> returns 200/403 -> perform DOM manipulation based on return code in ajax call Are there any libraries in PHP that currently do something to this similarly? Would OAuth be a good use for this scenario? Languages used are: js/html/css/php/MySQL

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