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  • How to gain understanding of large systems? [closed]

    - by vonolsson
    Possible Duplicate: How do you dive into large code bases? I have worked as a developer developing C/C++ applications for mobile platforms (Windows Mobile and Symbian) for about six years. About a year ago, however, I changed job and currently work with large(!) enterprise systems with high security and availability requirements, all developed in Java. My problem is that I am having a hard time getting a grip on the architecture of the systems, even after a year working with them, and understanding systems other people have built has never been my strong side. The fact that I haven't worked with enterprise systems before doesn't exactly help. Does anyone have a good approach on how to learn and understand large systems? Are there any particular techniques and/or patterns I should read up on?

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  • What should a system architect know? [closed]

    - by marko
    What does the title System Architect really mean? What do you need to know to be a system architect. Do you need to know design patterns or something like that? At work we have a couple so called "System Architects". They do the same stuff as we developers, but the distinction are that they are older and thus has more experience and knowledge of the business domain we work in. But I'm not really seeing the architecting side of work really...

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  • WiX tricks and best practices

    - by Si
    We've been using WiX 3 for a while now, and despite the usual gripes about ease of use, it's going reasonably well. What I'm looking for is useful advice regarding: Setting up a WiX project (layout, references, file patterns) Integrating WiX into solutions, and build/release processes Configuring installers for new installations and upgrades Also interested in any good WiX hacks you'd like to share, thanks!

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  • java Filter URL pattern specific to request params

    - by Rohit Desai
    Hi All, We have a situation where we want to use filter for URL's containing some specific request parameters. e.g htt://mydomain.com/?id=78&formtype=simple_form&....... htt://mydomain.com/?id=788&formtype=special_form&....... and so on , id are fetched at run time, I want configure filter in web.xml only if formtype=special_form. How should achieve the solution . Can filter be configure with regex patterns? Really appreciate your help on this. Thanks, Rohit

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  • Facebook Connect Statistics

    - by thekevinscott
    All, A client is asking for Facebook Connect statistical data. Specifically, how many people have shared a link to their wall. I have a Facebook app setup but I am having trouble interpreting the statistical data. Do Facebook apps collect this data, or can anyone think of any way of gleaning this data from the past month, from server logs or something? For instance, can I look at the logs for xd_receiver.htm and see usage patterns from that, or something?

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  • Becoming a better Android programmer

    - by Drew Dara-Abrams
    Any suggestions on how to become a better Android programmer? I'm past intro tutorials, which mainly focus on how to use pieces of the SDK, but I still struggle to structure big Android apps. Obviously the best use of my time is continuing with my coding projects, but I'm wondering if I should be learning more about Android particulars, solidifying my somewhat shaky Java knowledge, going back to object-oriented fundamentals or patterns...? Pointers to resources (books, example apps, sites) you've found helpful would be great.

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  • pattern matching in Bash

    - by Tim
    Hi, Here is an example to get different parts of a filename bash-3.2$ pathandfile=/tmp/ff.txt bash-3.2$ filename=$(basename $pathandfile) bash-3.2$ echo $filename ff.txt bash-3.2$ echo ${filename##*.} txt bash-3.2$ echo ${filename%.*} ff I was wondering what does ## and % mean in the patterns. How is the patten matching working? Thanks and regards!

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  • Android action bar like twitter sample

    - by Baris
    What is the best way to implement action bar like twitter sample UI Pattern. Twitter for Android: A closer look at Android’s evolving UI patterns Pattern 4: Action Bar http://android-developers.blogspot.com/2010/05/twitter-for-android-closer-look-at.html

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  • WiX tricks and tips

    - by Si
    We've been using WiX 3 for a while now, and despite the usual gripes about ease of use, it's going reasonably well. What I'm looking for is useful advice regarding: Setting up a WiX project (layout, references, file patterns) Integrating WiX into solutions, and build/release processes Configuring installers for new installations and upgrades Also interested in any good WiX hacks you'd like to share, thanks!

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  • Where Firefox extensions store data?

    - by Dmitry
    I want to write plugin for GNOME Do, that will work with Firefox extensions data (for example, with URL Alias patterns). I have looked through files in my profile folder (~/.mozilla/firefox/.default/), but haven't found anything related. Can anybody help me?

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  • How do I create midi data to trigger an Ultrabeat pattern in Logic?

    - by user289581
    I've made some Ultrabeat patterns but I can't figure out how to trigger them. I make the pattern on C-1, then I go back to the arrange window and hit record and then hit C1 on my keyboard, and it doesn't play the pattern, it just plays a single note. I have Pattern Mode enabled on Ultrabeat and I'm using a one-shot trigger but I can't seem to trigger my pattern to play at all. What am I doing wrong?

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  • ant compile problem

    - by senzacionale
    If I start ant compile in JDeveloper all classes are compiled successfully and copied to the classes folder. But if I run ant compile from console then no classes are copied to the classes folder. Does anyone know why? Maybe the problem is with: build.compiler=oracle.ojc.ant.taskdefs.OjcAdapter? build.properties: javac.debug=on oracle.home=C:/Oracle/jdevstudio10133 build.compiler=oracle.ojc.ant.taskdefs.OjcAdapter output.dir=classes javac.deprecation=on javac.nowarn=off package.name=KIS dest.dir=C:/Projekti/Projekt ANT/CVS src.dir=src view.dir=View model.dir=Model modelirc2000.dir=ModelIRC2000 build.xml for compile <target name="compile" description="Compile Java source files" depends="init"> <javac destdir="${dest.dir}/${package.name}/${model.dir}/${output.dir}" classpathref="classpath" debug="${javac.debug}" nowarn="${javac.nowarn}" deprecation="${javac.deprecation}" encoding="Cp1250" source="1.5" target="1.5"> <src path="${dest.dir}/${package.name}/${model.dir}/${src.dir}"/> <exclude name="irc/kis/model/dm/entity/common/ZnanjeImplMsgBundle.java/"/> <exclude name="META-INF/"/> <exclude name="irc/kis/view/"/> <exclude name="irc/kis/model/zap/view/vp/"/> </javac> </target> <target name="copy" description="Copy files to output directory" depends="init"> <patternset id="copy.patterns"> <include name="**/*.gif"/> <include name="**/*.jpg"/> <include name="**/*.jpeg"/> <include name="**/*.png"/> <include name="**/*.properties"/> <include name="**/*.xml"/> <include name="**/*-apf.xml"/> <include name="**/*.ejx"/> <include name="**/*.xcfg"/> <include name="**/*.cpx"/> <include name="**/*.dcx"/> <include name="**/*.wsdl"/> <include name="**/*.ini"/> <include name="**/*.tld"/> <include name="**/*.tag"/> <include name="**/*.jpx"/> </patternset> <copy todir="${dest.dir}/${package.name}/${model.dir}/${output.dir}"> <fileset dir="${dest.dir}/${package.name}/${model.dir}/${src.dir}"> <patternset refid="copy.patterns"/> </fileset> </copy> </target>

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  • High performance web (-services) applications

    - by User Friendly
    Hi, I'd like to become a guru in high performance web & web-services applications. What technologies/patterns/skills do you reccomend to look at? Basically, I have good skills at ASP.NET/.NET based web development, but I'd like to know how big things are built (on any platform, not depending on .net technology stack). Thank you.

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  • What is the python "with" statement designed for?

    - by fmark
    I came across the Python with statement for the first time today. I've been using Python lightly for several months and didn't even of its existence! Given its somewhat obscure status, I thought it would be worth asking: What is the Python with statement designed to be used for? What do you use it for? Are their any gotchas I need to be aware of, or common anti-patterns associated with its use?

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  • Validating XML using XSD with regex pattern

    - by Steel Plume
    Hello, I am parsing a XML file against a XSD containing some regex patterns used for checking input data, but only this regex generates an error, even if it passes into the Eclipse XSD plugin: InvalidRegex: Pattern value '(((com|it|org)\.)+(\b[a-z]+[.]{1}\b)+)?[A-Z]{1}[A-Za-z]+' is not a valid regular expression. The reported error was: 'This expression is not supported in the current option setting.'. So, with SAX validator where can I find the fatal "current option setting"?

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  • What is 'System Usage Specification' ?

    - by rohit k.
    My software is a video-audio converter and video cutter. I have used Qt(compiled from source) and ffmpeg (compiled from source). I have to prepare System Usage Specification outline and Specify Usage patterns of the system and indicate it using Run charts / Histograms. I am told to use Winrunner for this purpose. I don't know exactly what to do. Please help.

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  • Perl copy directory excluding some files

    - by user65457
    In my Perl code, I need to copy a directory from one location to another on the same host excluding some files/patterns (e.g. *.log, ./myDir/abc.cl). What would be the optimum way of doing this in Perl across all the platforms? On windows, xcopy is one such solution. On unix platforms, is there a way to do this in perl?

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  • Bash: trim a parameter from both ends

    - by Andrey Kazak
    Greetings! This are well know Bash parameter expansion patterns: ${parameter#word}, ${parameter##word} and ${parameter%word}, ${parameter%%word} I need to chop one part from the beginning and anoter part from the trailing of the parameter. Could you advice something for me please?

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  • Collaboration Diagrams: how to represent setting a variable's and attribute's value to a specified v

    - by devoured elysium
    Let's assume I have a class called MyClass with an attribute called MyAttribute and a method called MyMethod(). Inside that method I'd like to have a variable called MyVariable. I'd like to set the value of MyVariable to "MyVariable" and MyAttribute to "MyAttribute" inside the call to MyMethod(). How can I do this in a Collaboration Diagram? I can't find any info of this kind on the internet and the book I'm studying from (Applying UML and Patterns) is very vague in the details. Thanks

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  • Good event calendaring / scheduling design guide?

    - by Neil McF
    Hello, In an application I'm designing, the user has to be able to specify rather complex event scheduling (continuous time-block vs. daily time-blocks, exception date/times, recurrence patterns etc.) Does anyone know of a good design page for such a thing online? For example, I was highly impressed with this page's description of how to do database audit trails, and would love something similar. Thanks.

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  • Any software for pattern-matching and -rewriting source code?

    - by Steven A. Lowe
    I have some old software (in a language that's not dead but is dead to me ;-)) that implements a basic pattern-matching and -rewriting system for source code. I am considering resurrecting this code, translating it into a modern language, and open-sourcing the project as a refactoring power-tool. Before I go much further, I want to know if anything like this exists already (my google-fu is fanning air on this tonight). Here's how it works: the pattern-matching part matches source-code patterns spanning multiple lines of code using a template with binding variables, the pattern-rewriting part uses a template to rewrite the matched code, inserting the contents of the bound variables from the matching template matching and rewriting templates are associated (1:1) by a simple (unconditional) rewrite rule the software operates on the abstract syntax tree (AST) of the input application, and outputs a modified AST which can then be regenerated into new source code for example, suppose we find a bunch of while-loops that really should be for-loops. The following template will match the while-loop pattern: Template oldLoopPtrn int @cnt@ = 0; while (@cnt@ < @max@) { … @body@ ++@cnt@; } End_Template while the following template will specify the output rewrite pattern: Template newLoopPtrn for(int @cnt@ = 0; @cnt@ < @max@; @cnt@++) { @body@ } End_Template and a simple rule to associate them Rule oldLoopPtrn --> newLoopPtrn so code that looks like this int i=0; while(i<arrlen) { printf("element %d: %f\n",i,arr[i]); ++i; } gets automatically rewritten to look like this for(int i = 0; i < arrlen; i++) { printf("element %d: %f\n",i,arr[i]); } The closest thing I've seen like this is some of the code-refactoring tools, but they seem to be geared towards interactive rewriting of selected snippets, not wholesale automated changes. I believe that this kind of tool could supercharge refactoring, and would work on multiple languages (even HTML/CSS). I also believe that converting and polishing the code base would be a huge project that I simply cannot do alone in any reasonable amount of time. So, anything like this out there already? If not, any obvious features (besides rewrite-rule conditions) to consider? EDIT: The one feature of this system that I like very much is that the template patterns are fairly obvious and easy to read because they're written in the same language as the target source code, not in some esoteric mutated regex/BNF format.

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  • IoC/DI in the face of winforms and other generated code

    - by Kaleb Pederson
    When using dependency injection (DI) and inversion of control (IoC) objects will typically have a constructor that accepts the set of dependencies required for the object to function properly. For example, if I have a form that requires a service to populate a combo box you might see something like this: // my files public interface IDataService { IList<MyData> GetData(); } public interface IComboDataService { IList<MyComboData> GetComboData(); } public partial class PopulatedForm : BaseForm { private IDataService service; public PopulatedForm(IDataService service) { //... InitializeComponent(); } } This works fine at the top level, I just use my IoC container to resolve the dependencies: var form = ioc.Resolve<PopulatedForm>(); But in the face of generated code, this gets harder. In winforms a second file composing the rest of the partial class is generated. This file references other components, such as custom controls, and uses no-args constructors to create such controls: // generated file: PopulatedForm.Designer.cs public partial class PopulatedForm { private void InitializeComponent() { this.customComboBox = new UserCreatedComboBox(); // customComboBox has an IComboDataService dependency } } Since this is generated code, I can't pass in the dependencies and there's no easy way to have my IoC container automatically inject all the dependencies. One solution is to pass in the dependencies of each child component to PopulatedForm even though it may not need them directly, such as with the IComboDataService required by the UserCreatedComboBox. I then have the responsibility to make sure that the dependencies are provided through various properties or setter methods. Then, my PopulatedForm constructor might look as follows: public PopulatedForm(IDataService service, IComboDataService comboDataService) { this.service = service; InitializeComponent(); this.customComboBox.ComboDataService = comboDataService; } Another possible solution is to have the no-args constructor to do the necessary resolution: public class UserCreatedComboBox { private IComboDataService comboDataService; public UserCreatedComboBox() { if (!DesignMode && IoC.Instance != null) { comboDataService = Ioc.Instance.Resolve<IComboDataService>(); } } } Neither solution is particularly good. What patterns and alternatives are available to more capably handle dependency-injection in the face of generated code? I'd love to see both general solutions, such as patterns, and ones specific to C#, Winforms, and Autofac.

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  • Matching unmatched strings based on a unknown pattern

    - by Polity
    Alright guys, i really hurt my brain over this one and i'm curious if you guys can give me any pointers towards the right direction i should be taking. The situation is this: Lets say, i have a collection of strings (let it be clear that the pattern of this strings is unknown. For a fact, i can say that the string contain only signs from the ASCII table and therefore, i dont have to worry about weird Chinese signs). For this example, i take the following collection of strings (note that the strings dont have to make any human sence so dont try figguring them out :)): "[001].[FOO].[TEST] - 'foofoo.test'", "[002].[FOO].[TEST] - 'foofoo.test'", "[003].[FOO].[TEST] - 'foofoo.test'", "[001].[FOO].[TEST] - 'foofoo.test.sample'", "[002].[FOO].[TEST] - 'foofoo.test.sample'", "-001- BAR.[TEST] - 'bartest.xx1", "-002- BAR.[TEST] - 'bartest.xx1" Now, what i need to have is a way of finding logical groups (and subgroups) of these set of strings, so in the above example, just by rational thinking, you can combine the first 3, the 2 after that and the last 2. Also the resulting groups from the first 5 can be combined in one main group with 2 subgroups, this should give you something like this: { { "[001].[FOO].[TEST] - 'foofoo.test'", "[002].[FOO].[TEST] - 'foofoo.test'", "[003].[FOO].[TEST] - 'foofoo.test'", } { "[001].[FOO].[TEST] - 'foofoo.test.sample'", "[002].[FOO].[TEST] - 'foofoo.test.sample'", } { "-001- BAR.[TEST] - 'bartest.xx1", "-002- BAR.[TEST] - 'bartest.xx1" } } Sorry for the layout above but indenting with 4 spaces doesnt seem to work correctly (or im frakk'n it up). Anyways, I'm not sure how to approach this problem (how to get the result desired as indicated above). First of, i thought of creating a huge set of regexes which would parse most known patterns but the amount of different patterns is just to huge that this isn't realistic. Another think i thought of was parsing each indidual word within a string (so strip all non alphabetic or numeric characters and split by those), and if X% matches, i can assume the strings belong to the same group. (where X wil probably be around 80/90). However, i find the area of speculation kinda big. For example, when matching strings with each 20 words, the change of hitting above 80% is kinda big (that means that 4 words can differ), however when matching only 8 words, 2 words at most can differ. My question to you is, what would be a logical approach in the above situation? Thanks in advance!

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  • How do I get the entity framework to work with archive flags?

    - by Orion Adrian
    I'm trying to create a set of tables where we don't actually delete them, but rather we set the archive flags instead. When we delete an entity, it shouldn't be deleted, it should be marked as archived instead. What are the programming patterns to support this? I would also prefer not to have to roll out my own stored procs for every table that have these archive flags if there is another solution.

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