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  • Architecture of a "website generator" web application

    - by Resorath
    What is the most maintainable and efficient way to architect a web application who's purpose is to host and generate websites which can be customized to a certain degree? There are a lot of these style of applications in the wild that generate all kinds of sites, from sites that host World of Warcraft guilds like guildlaunch to other sites like my wedding for wedding site hosting. My question is, what is the basic architecture that these sites operate on? I imagine there are two ways of thinking about this. A central set of code that all sites on the host run against, and it acts differently based on which site was visited. In this manner, when the base code is updated all sites are updated simultaneously. Or, the code for an individual site exists in a silo, and is simply replicated to a new directory each time a site is created. When an update needs to be applied, the code is pushed out to each site silo. In my case, I am working in PHP with the CodeIgniter framework, however the answer need not be limited to this case. Which method (if any) creates a more maintainable and efficient architecture to manage this style of web application?

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  • Good practices when writing a parser for a standard file format (such as ePub)

    - by J-F L-R
    I am considering writing an Android reader software that can read ePubs and display them. I checked the ePub standard documents. However, these contain a lot of information. So I am wondering what is the process of implementing a standard for a file format. What are the steps to get a working implementation without passing by parts of the standard? Are there any best practices? Also, is it even possible to program this alone in a reasonable time? From what I have already found out, ePub is basically a zip archive. That means I could probably use zlib to decompress it. The content is in XHTML and CSS, so I believe it should be possible to display it in a WebView. The parts that are missing are writing the code that can read the metadata and manage the non-standard XHTML extensions.

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  • C# and SQL data layer code generator

    I've created a simple yet efficient tool to help generate stored procedures and a C# data access layer from a table.  Instead of using an ORM, this uses standard ADO .NET (SqlConnection, SqlDataReader, etc).  Check it out at www.asteio.com.  It's saved me a ton of time and I'm hoping it does the same for you....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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  • Licensing generator/validator program [closed]

    - by AtoMerZ
    I need to write a program that generates/validates license for users of my application. The application has a number of features each of which can be purchased by the user. Also each feature can be enabled in trial mode. Meaning only for a specified duration of time. Before I actually try to write the code myself, I'm wondering if there are any free/commercial programs similar to what I'm looking for.

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  • What's the best way to customize / add pages to the admin generator?

    - by Guillaume Flandre
    I'm using Symfony 1.4 and Doctrine. My application's backend was built using Symfony's admin generator. It works great when I want to display basic stuff. But tehre's not a lot of documentation on how to enhance it and add new pages. Let's take an example: I want to list published items on one page and to-be-published items on another one. I've used several ways to that in my application but can't figure out what the best way is: playing with filters and then modify templates depending on where you are? creating another module calling a different table_method? some other technique I don't know about? What's the best practice here? How do you guys usually do to customize your admin?

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  • How hard is it to create a not-so-random number generator?

    - by Duracell
    Backstory: So I was driving to band practice this evening. My car has a USB port where you can plug in a USB stick with MP3 files on it and the stereo will play them. I have about 100 MP3s on my stick so I pushed the 'Random' button. So from here to band practice, it played: Track 22 Track 45 Track 4 Track 11 Track 87 Track 66 Track 98 Then on the way home, it played Track 16 Track 27 Track 33 And then I stopped at the petrol station. I filled up, got back in the car and the stereo fired up again. It played Track 22 Track 45 Track 4 Track 11 Track 87 I thought, WTF? What's with this 'random' generator? What are they using as a seed, if not time? Is a car stereo so memory-tight that it can't even use the C stdlib? Does anyone know how this kind of thing happens?

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  • Sqlite catalog and schema settings (for MyBatis generator)

    - by user1769754
    I have been trying to use the MyBatis generator on a Sqlite database but can't seem to find what settings to use for the XML attributes catalog and schema. The generator errors with "Generation Warnings Occured: Table configuration with catalog main, schema sqlite_master, and table testTable did not resolve to any tables" I can't find much from the sqlite website other than this which gives something like catalog = main, schema = sqlite or sqlite_master My generator XML file is <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" > <generatorConfiguration > <context id="context"> <jdbcConnection driverClass="org.sqlite.JDBC" connectionURL="jdbc:sqlite:testDB.sqlite" userId="" password="" ></jdbcConnection> <javaModelGenerator targetPackage="model" targetProject="test/src" ></javaModelGenerator> <sqlMapGenerator targetPackage="model" targetProject="test/src" ></sqlMapGenerator> <javaClientGenerator targetPackage="model" targetProject="test" type="XMLMAPPER" ></javaClientGenerator> <table catalog="main" schema="sqlite_master" tableName="testTable" > <property name="useActualColumnNames" value="true"/> </table> </context> </generatorConfiguration> I have also tried other combinations like <table catalog="main" schema="sqlite" tableName="testTable" > <table schema="sqlite" tableName="testTable" > <table schema="sqlite_master" tableName="testTable" > <table schema="main.testTable" tableName="testTable" > Anyone here know the right settings?

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  • What is purpuse of T4 Generator in T4toolbox

    - by Fred Yang
    I am using T4toolbox, I am confused what the generator is for. I can run the following public class Generator1 : Generator { protected override void RunCore() { Template1 t = new Template1(); t.Output.File = "t3.txt"; t.Render(); } } or I can run t4 script directly like the following. Template1 t = new Template1(); t.Output.File = "t3.txt"; t.Render(); But I can do the same using t4 script without generator as well. So I mean can do the same thing with two approach "script -- generator -- template" and "script -- template", am I missing something? Thanks

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  • Configuring hibernate.reveng.xml to detect a sequence PK generator with hibernate3-maven-plugin and

    - by mmm
    Hi, is there a way to configure hibernate3-maven-plugin so that a sequence generator is detected for a primary-key? I'm using a bottom-up approach for hibernate configuration (which means letting hibernate-tools generate the hibernate configuration using a jdbc-connection for you via reverse-engineering on an existing database schema). I've read this, but also this already (those two can be unrelated, but can also leave a hint). My hibernate.reveng.xml is the following: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-reverse-engineering SYSTEM "http://hibernate.sourceforge.net/hibernate-reverse-engineering-3.0.dtd" > <hibernate-reverse-engineering> <table name="ORDERS"> <primary-key> <!-- setting up a specific id generator for a table --> <generator class="sequence"> <param name="sequence">ORDERS_ORDER_ID_seq</param> </generator> <key-column name="ORDER_ID"/> </primary-key> </table> </hibernate-reverse-engineering> And I'm expecting it to generate an Orders.hbm.xml file like this: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 2010-06-06 18:55:42 by Hibernate Tools 3.2.2.GA --> <hibernate-mapping> <class name="some.package.Orders" table="orders" schema="public"> <id name="orderId" type="long"> <column name="order_id" /> <generator class="sequence"> <param name="sequence">ORDERS_ORDER_ID_seq</param> </generator> </id> ... </class> </hibernate-mapping> ...but receiving this instead: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 2010-06-06 18:55:42 by Hibernate Tools 3.2.2.GA --> <hibernate-mapping> <class name="some.package.Orders" table="orders" schema="public"> <id name="orderId" type="long"> <column name="order_id" /> <generator class="assigned" /> </id> ... </class> </hibernate-mapping> I know my hibernate.reveng.xml is being read by hibernate3-maven-plugin, as I experience maven errors whenever syntax errors appear in the file, so pom.xml seems to be correct and hibernate.reveng.xml syntactically correct. Any clues?

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  • Error launching external scanner info generator (sh -c 'g++ -E -P -v -dD )

    - by kranthikumar
    Error launching external scanner info generator (sh -c 'g++ -E -P -v -dD ) (Cannot run program "make": Launching failed) More precisely, the error messages are: Error Launching external scanner info generator - gcc link problem on MingGW Error launching external scanner info generator (sh -c 'g++ -E -P -v -dD C:/Documents and Settings/user1/workspace123/.metadata/.plugins/org.eclipse.cdt.make.core/specs.cpp ') Error launching external scanner info generator (sh -c 'gcc -E -P -v -dD C:/Documents and Settings/user1/workspace123/.metadata/.plugins/org.eclipse.cdt.make.core/specs.c ') This problem is occurring in eclipse-SDK-3.2.2-win32 with CDT. Can anyone solve this problem? Did anyone have any solution to this problem? Please help to me to solve this problem . Yours faithfully. Anilkumar.k

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  • Is it possible to create a single tokenizer to parse this?

    - by Adrian
    This extends off this other Q&A thread, but is going into details that are out of scope from the original question. I am generating a parser that is to parse a context-sensitive grammar which can take in the following subset of symbols: ,, [, ], {, }, m/[a-zA-Z_][a-zA-Z_0-9]*/, m/[0-9]+/ The grammar can take in the following string { abc[1] }, } and parse it as ({, abc[1], }, }). Another example would be to take: { abc[1] [, } and parse it as ({, abc[1], [,, }). This is similar to the grammar used in Perl for the qw() syntax. The braces indicate that the contents are to be whitespace tokenized. A closing brace must be on its own to indicate the end of the whitespace tokenized group. Can this be done using a single lexer/tokenizer, or would it be necessary to have a separate tokenizer when parsing this group?

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  • Is there a good (standalone) PHPDoc parser class or function in PHP?

    - by Kris
    Hi folks, I'm looking for some method of converting a PHP Docblock (as used for generating documentation by tools like Doxygen) into a structure I can inspect in PHP. For example, I want to parse the following lines: /** * Multiply two values * @CHECKME * * @author someone * @created eons ago * * @param integer $x * @param integer $x * * @return integer */ function multiply($x, $y) { return $x * $y; } Into something similar to: array( 'author' = 'someone' ,'created' = 'eons ago' ,'param' = array( 'integer $x' ,'integer $y' ) ,'_flags' = array( '@CHECKME' ) ); I explicitly cannot use PEAR or any such library, it has to be relatively standalone. Any given solution that is better than using a bunch of regexes after stripping away comment outline would be awesome.

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  • Ubuntu: disable udev's persistent-net-generator.rules

    - by Luke404
    I'm using Ubuntu 12.04 LTS server edition and I am modifying /etc/udev/rules.d/70-persistent-net.rules to define my own mappings of ethernet interfaces to MAC addresses; that file is initially generated by rules in /lib/udev/rules.d/75-persistent-net-generator.rules at system installation time (or at the first boot, I actually don't know and it doesn't matter here). How can I be sure that my edited version will never ever be overwritten by anything? Removing the persistent-net-generator, as suggested on some websites, is not the Right Thing™ to do as told by comments in the file itself: it will be overwritten by any update of the udev package. I'm looking for a more formally correct way to disable it. Is it enough to just make sure that /etc/udev/rules.d/70-persistent-net.rules does exist? Maybe there are other events that could trigger its regeneration? (eg. adding or removing ethernet interfaces to the system?)

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  • How to read reduce/shift conflicts in LR(1) DFA?

    - by greenoldman
    I am reading an explanation (awesome "Parsing Techniques" by D.Grune and C.J.H.Jacobs; p.293 in the 2nd edition) and I moved forward from my last question: How to get lookahead symbol when constructing LR(1) NFA for parser? Now I have such "problem" (maybe not a problem, but rather need of confirmation from some more knowledgeable people). The authors present state in LR(0) which has reduce/shift conflict. Then they build DFA for LR(1) for the same grammar. And now they say it does not have a conflict (lookaheads at the end): S -> E . eof E -> E . - T eof E -> E . - T - and there is an edge from this state labeled - but no labeled eof. Authors says, that on eof there will be reduce, on - there will be shift. However eof is for shift as well (as lookahead). So my personal understanding of LR(1) DFA is this -- you can drop lookaheads for shifts, because they serve no purpose now -- shifts rely on input, not on lookaheads -- and after that, remove duplicates. S -> E . eof E -> E . - T So the lookahead for reduce serves as input really, because at this stage (all required input is read) it is really incoming symbol right now. For shifts, the input symbols are on the edges. So my question is this -- am I actually right about dropping lookaheads for shifts (after fully constructing DFA)?

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  • Parsing RSS2.0 feeds using Pull Parser on Android

    - by Samuh
    I am trying to parse a RSS2.0 feed, obtained from a remote server, on my Android device using XML Pull Parser. // get a parser instance and set input,encoding XmlPullParser parser = Xml.newPullParser(); parser.setInput(getInputStream(), null); I am getting invalid token exceptions: Error parsing document. (position:line -1, column -1) caused by: org.apache.harmony.xml.ExpatParser$ParseException: At line 158, column 25: not well-formed (invalid token) Strangely, when I download the feed XML on the device, bundle it inside the raw folder and then run the same code. Everything works fine. What could be the problem here? How do I validate the XML before I parse it on device? Thanks.

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  • Perl XML SAX parser emulating XML::Simple record for record

    - by DVK
    Short Q summary: I am looking a fast XML parser (most likely a wrapper around some standard SAX parser) which will produce per-record data structure 100% identical to those produced by XML::Simple. Details: We have a large code infrastructure which depends on processing records one-by-one and expects the record to be a data structure in a format produced by XML::Simple since it always used XML::Simple since early Jurassic era. An example simple XML is: <root> <rec><f1>v1</f1><f2>v2</f2></rec> <rec><f1>v1b</f1><f2>v2b</f2></rec> <rec><f1>v1c</f1><f2>v2c</f2></rec> </root> And example rough code is: sub process_record { my ($obj, $record_hash) = @_; # do_stuff } my $records = XML::Simple->XMLin(@args)->{root}; foreach my $record (@$records) { $obj->process_record($record) }; As everyone knows XML::Simple is, well, simple. And more importantly, it is very slow and a memory hog - due to being a DOM parser and needing to build/store 100% of data in memory. So, it's not the best tool for parsing an XML file consisting of large amount of small records record-by-record. However, re-writing the entire code (which consist of large amount of "process_record"-like methods) to work with standard SAX parser seems like an big task not worth the resources, even at the cost of living with XML::Simple. What I'm looking for is an existing module which will probably be based on a SAX parser (or anything fast with small memory footprint) which can be used to produce $record hashrefs one by one based on the XML pictured above that can be passed to $obj->process_record($record) and be 100% identical to what XML::Simple's hashrefs would have been. I don't care much what the interface of the new module is - e.g whether I need to call next_record() or give it a callback coderef accepting a record.

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  • Perl XML SAX parser emulating XML::Simple record for record

    - by DVK
    Short Q summary: I am looking a fast XML parser (most likely a wrapper around some standard SAX parser) which will produce per-record data structure 100% identical to those produced by XML::Simple. Details: We have a large code infrastructure which depends on processing records one-by-one and expects the record to be a data structure in a format produced by XML::Simple since it always used XML::Simple since early Jurassic era. An example simple XML is: <root> <rec><f1>v1</f1><f2>v2</f2></rec> <rec><f1>v1b</f1><f2>v2b</f2></rec> <rec><f1>v1c</f1><f2>v2c</f2></rec> </root> And example rough code is: sub process_record { my ($obj, $record_hash) = @_; # do_stuff } my $records = XML::Simple->XMLin(@args)->{root}; foreach my $record (@$records) { $obj->process_record($record) }; As everyone knows XML::Simple is, well, simple. And more importantly, it is very slow and a memory hog - due to being a DOM parser and needing to build/store 100% of data in memory. So, it's not the best tool for parsing an XML file consisting of large amount of small records record-by-record. However, re-writing the entire code (which consist of large amount of "process_record"-like methods) to work with standard SAX parser seems like an big task not worth the resources, even at the cost of living with XML::Simple. What I'm looking for is an existing module which will probably be based on a SAX parser (or anything fast with small memory footprint) which can be used to produce $record hashrefs one by one based on the XML pictured above that can be passed to $obj->process_record($record) and be 100% identical to what XML::Simple's hashrefs would have been.

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