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  • Registration is Open for Spring 2010 Event!

    - by Day of .Net in Ann Arbor
    Day of .NET in Ann Arbor is a one-day conference on all things .NET organized by developers for developers. This event is being offered at a minimal cost to anyone interested in .NET development, and will take place on May 1, 2010 at Washtenaw Community College in Ann Arbor, MI. Details: http://www.dayofdotnet.org/AnnArbor/Spring2010/ Registration: http://dodn.eventbrite.com/ The Day of .NET in Ann Arbor is a collaborative effort between the following INETA member groups: Great Lakes Area .NET User Group  http://www.migang.org/ Ann Arbor .NET Developer Group  http://www.aadnd.org/ Northwest Ohio .NET User Group  http://www.nwnug.com/

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  • does my js replace view?

    - by Milla Well
    I am writing a web application which is based on Codeigniter and jQuery. I primarily use ajax to call my controller functions and it turned out, that there are just 4 view*.php files, because most of my contoller functions return JSON data, which is processed in my jQuery. So my actual code is divided in kind of MVCC model: Codeigniter model (db, computations) Codeigniter controller (filtering, xss-cleaning, checking permissions, call model functions) jQuery controller (callback functions) jQuery view (adding/removing classes, appending elements,... ) So I violate the paradigm of not using the echo function in my Codeiginter controller and simply call echo json_encode($result); because it doesn't make any sense to me to create a view*.php file for one loc. Especially because all the regular view*.php stuff is covered in my jQuery view. I was wondering if I am missing something out, or if there is a way to integrate this jQuery-controller in my Codeigniter. I found some words on this topic, but this seems pretty handmade. Are there some neat solutions? Does a MVCC model make sense?

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  • HAProxy is caching the forwarding?

    - by shadow_of__soul
    i'm trying to set up a server structure for an application i'm building in Node.js with socket.io. My setup is: HAProxy frontend forward to -> apache2 as default backend (or nginx, is apache in this local test) -> node.js app if the url has socket.io in the request AND a domain name i have something like: global log 127.0.0.1 local0 log 127.0.0.1 local1 notice maxconn 4096 user haproxy group haproxy daemon defaults log global mode http maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 frontend all 0.0.0.0:80 timeout client 5000 default_backend www_backend acl is_soio url_dom(host) -i socket.io #if the request contains socket.io acl is_chat hdr_dom(host) -i chaturl #if the request comes from chaturl.com use_backend chat_backend if is_chat is_soio backend www_backend balance roundrobin option forwardfor # This sets X-Forwarded-For timeout server 5000 timeout connect 4000 server server1 localhost:6060 weight 1 maxconn 1024 check #forwards to apache2 backend chat_backend balance roundrobin option forwardfor # This sets X-Forwarded-For timeout queue 50000 timeout server 50000 timeout connect 50000 server server1 localhost:5558 weight 1 maxconn 1024 check #forward to node.js app The problem comes when i made a request to something like www.chaturl.com/index.html it load perfectly but fails to loads the socket.io files (www.chaturl.com/socket.io/socket.io.js) why it redirect to apache (and should redirect to the node.js app that serve the files). The weird thing is that if i access directly to the socket.io file, after refreshing a few times, it loads, so i suppose is "caching" the forwarding for the client when it makes the first request and reach the apache server. Any suggestion of how this can be solved? or what i can try or look about this?

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  • Event Framework for OO Architecture in JS

    A reusable event framework for all you javascript needs....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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  • What are good JS libraries for game dev?

    - by acidzombie24
    If I decide to write a simple game both text and graphical (2d) what libraries would I use? (Assume we are using a HTML5 compatible browser) The main things I can think of Rendering text on screen Animating sprites (using images/css) Input (capturing the arrow keys and getting relative mouse positions) Perhaps some preloading resource or dynamically loading resources and choosing order Sound (but I am unsure how important this will be to me at first). Perhaps with mixing and chaining sounds or looping forever until stop. Networking (low priority) to connect a user to another or to continuously GET data without multiple request (I know this exist but I don't know how easy it is to setup or use. But this isn't important to me. Its for the question).

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  • Invalid Html Response and JS Errors when you open your Application in Visual Studio 2013

    - by imran_ku07
     I was working on an application which uses Telerik controls. The application was working fine for a while. Suddenly, the application stopped working. I mean lot of my application pages becoming very very ugly. I found JavaScript errors on every Browser's console. When I check the page view-source, the generated HTML was messy and invalid. This was only happening with my local machine. If someone else on my network accesses my application pages, he will get the correct HTML and no JavaScript errors. My mind was blowing because the same page was generating invalid HTML(and JavaScript errors) when I access the page using a local browser but generate correct HTML(and no JavaScript errors) when someone else access my application page remotely. Then I realized that I the only change I made last was opening my application in Visual Studio 2013 RTM which I installed few days ago. I closed the Visual Studio 2013, everything work like a charm. Then I became100% sure that this is only happening due to new Visual Studio 2013 feature called Browser Link. I just open the application again and add this in web.config. Everything become fine Happy coding :)   <add key="vs:EnableBrowserLink" value="false" />

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  • Checking whether a specific key was pressed in enchantJS

    - by MxyL
    I am using enchantJS and would like to use the letters and numbers as well as numpad on a keyboard to do different things (eg: hotkeys). From this page http://users.csc.calpoly.edu/~foaad/enchant/guide/playerInput.html By default, enchant.js provides input listeners for six buttons: UP, DOWN, LEFT, RIGHT, A, and B. By default, the directions are bound to the arrow keys. Any of the six buttons may also be bound to any key with an ASCII value. We’ll address that later. So enchant provides the ability to bind keys to different input such as up, down, left, right...but how can I simply check whether the D or X key was pressed, and if so, perform certain actions based on that event?

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  • Optimization of a Hybrid Pagination Scheme

    - by Kaustubh Karkare
    I'm working on a Web Application using node.js in which I'm building a partial copy of the database on the client-side to decrease the load on my server. Right now, I have a function like this (expressed as python-style pseudocode, but implemented in JavaScript): get(table_name,primary_key): if primary_key in cache[table_name]: return cache[table_name][primary_key] else: x = get_data_from_server(table_name,primary_key) # socket.io return cache[table_name][primary_key] = x While this scheme works perfectly well for caching individual rows, I'd like to extend it to support the creation of paginated tables ordered according to the primary_key, and loading additional data using the above function for only the current and possibly the adjacent pages. Now, I don't want to keep the list of primary keys on the server to be retrieved every time I need to change the page (which, for reasons beyond the scope here, will be very frequent), and keeping it on the client side, subject to real-time create/delete events from the server, doesn't seem that good an idea, even after compression (using ranges, instead of individual values). What is the best way to calculate which items are to be displayed on a random page, minimizing the space requirements & the need for communication with the server?

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  • Why is Backbone.js a bad option in the Technology radar 2012 of thoughtworks?

    - by Cfontes
    In the latest Technology Radar 2012 they state that Backbone.js has pushed to far on it's MVC abstraction and say that Knockout.js or Angular.js should be used instead. I cannot get why they think that Backbone.js model is bad, for me it's just a way to create a standard so people can have some kind of roadmap to dev frontend JS without Spaghetti code. Also for me Angular and Knockout solve a different problem, I like both of them but having to code all MVC classes is something I think is kind of a rework. The thing is simple easy extendable and fast to learn, comes with a lot of goodies and is easy to combine with other Frameworks. (see Knockback.js) Can anybody tell me what made it so bad to their eyes ?

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  • Spring SQL Connections 2011 and SQLServerCentral.

    Once again SQLServerCentral is sponsoring a track at SQL Connections in Orlando this March. Read about the event and our speakers and join us for SQL Server training in Florida. Join SQL Backup’s 35,000+ customers to compress and strengthen your backups "SQL Backup will be a REAL boost to any DBA lucky enough to use it." Jonathan Allen. Download a free trial now.

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  • Can various browsers be assumed to maintain predictible state accurately in multiplayer online gaming?

    - by Nikos
    With many games it is said that server will assume that clients keep track of the world accurately. Assuming this is true, for a browser based multiplier space invaders game you would only tell the client when new bullets or the players ship moves and everything that behaves in a predetermined manner in the js client. It would be expected that positions would be the same in the browsers. Do you think you could trust browsers to do this? I feel that timings could differ between rendering loops and cause positions to get out of sync and might just get the server to maintain all the positions to make sure.

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  • Alternatives to JS in the browser: your experience [closed]

    - by Andrea
    In these days there are many projects whose aim is to bring new languages to the browser by compiling them to JavaScript. Among the others one can mention ClojureScript, CoffeScript, Dart, haXe, Emscripten, Amber Smalltalk. I understand that in part the response to this answer depends on the particular project. But, anyway: Have you tried any of them? Are these tentatives suitable for production sites? Should I want to try one of those, what are the downsides I should carefully evaluate? By the way, I expect the answer to be slightly misleading for CoffeeScript, since its semantics is very close to that of JavaScript, so I guess it should be easier to make it work seamlessly with the existing JavaScript ecosystem.

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  • Windows Azure v1.7 Spring Release Today&ndash;New Management Dashboard

    - by ToStringTheory
    Today, Microsoft will be publicly releasing a new version of Azure for public consumption.  The web conference, at http://www.meetwindowsazure.com will be airing at 1 PM PST.  They have already released an update to the Service Dashboard that can be accessed by going to http://manage.windowsazure.com.  I have some images of the new dashboard here that I have gathered and removed any PII from.  Let me know what you think! Images You should be able to click any of the images for a full resolution image. Tutorial The first thing you get after signing in is the tutorial: Landing After the tutorial completes, you get a screen with services that are active on your account on the left, and a list of ALL services (db/blob/SQL Azure) on the right.  I like the quick access to services across any of my subscriptions: Service Information These are images from a running web site with several roles.  I love how easy they have made many of the features: SQL Azure They have given some great quick functionality for looking at your DB information: Storage Here is the basic information that they give you for any storage accounts you have: Adding Services Super quick and easy to add services with the new UI: Conclusion I am EXCITED!  As you may have seen in the left side of my blog, I am an MCPD in Azure Development, and I must say that I am excited to see Microsoft moving forward with the technology and not letting it stagnate.  After as much as I have fought the other Azure dashboard, I like the friendliness and fluidity of this one. The important thing to note about ALL of the images above: this is HTML, not Silverlight.  The responsiveness is FAST on all of the actions I completed, and I believe that this is a big step forward for Azure… So, what do you think?

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  • What are deferred callbacks?

    - by tentimes
    I understand the idea of a callback, where I pass a function into another function and that function then uses the supplied function at will. I am struggling to understand deferred callbacks, even after googling it. Could someone provide a simple explanation please? I program in Ruby, but also know C/C++ a bit, but most of all I was a experienced assembly language programmer. So I am wondering is it a bit like a stack of callback addresses that get pop'd? I am hoping to learn jquery or node.js and these deferred callbacks seem integral to both. I understand basic threading principles (though mutex object makes my head hurt ;)

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  • How to synchronise the acceleration, velocity and position of the monsters on the server with the players?

    - by Nick
    I'm building an MMO using Node.js, and there are monsters roaming around. I can make them move around on the server using vector variables acceleration, velocity and position. acceleration = steeringForce / mass; velocity += acceleration * dTime; position += velocity * dTime; Right now I just send the positions over, and tell the players these are the "target positions" of the monsters, and let the monsters move towards the target positions on the client with a speed dependant on the distance of the target position. It works but looks rather strange. How do I synchronise these properly with the players without looking funny to them, taking into account the server lag? The problem is that I don't know how to make use of the correct acceleration/velocity values here; right now they just move directly in a straight line to the target position instead of accelerating/braking there properly. How can I implement such behaviour?

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  • Problem after installing node.js on Debian Lenny

    - by gmunk
    I managed to install node.js successfully on my machine but when invoking make test I get an error message: python tools/test.py --mode=release simple === release test-net-pingpong === Path: simple/test-net-pingpong server listening on 20989 localhost server listening on 20988 undefined Error: EAFNOSUPPORT, Address family not supported by protocol at net:1041:19 at dns:105:7 at EventEmitter._tickCallback (node.js:48:25) at node.js:176:9 I found out that EAFNOSUPPORT means that the OS does not support a particular protocol and a program tries to use it. So from what I can deduce my Debian does not have support for dns? Any help is appreciated!

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  • Spring Cleaning

    - by Tim Dexter
    I recently got a shiny new laptop; moving my shiz from old to new, was not the nightmare it used to be. I have gotten into the habit of using a second hard drive in the media bay where the CDROM normally sits. That drive contains my life's work with BIP. I can pull it out and plug it into another machine very easily. I have been sorting through some old directories and files, archiving some, sharing others with colleagues. For instance, a little dated but if you were looking for a list of Publisher reports available in EBS R12.1, here it is. Im trying to track down a more recent R12 instance and will re-post the document. I also found another gem; its a little out there in terms of usefulness but Im sharing it none the less. You can embed, locally or remotely reference SVG graphics (in XML format) and bring the images into the BIP outputs. Template and sample data here. A nice set of templates showing page number control and page suppression - they will need some explanation, so I'll save them for another post. The list goes on but I'll save them for later. Back to the clean up!

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  • node.js on CentOS box is at v0.6.18, yum doesn't update or upgrade it. Why?

    - by ariestav
    I'm currently working with a CentOS box that has a version of node installed, when I do: nodejs -v I get v0.6.18 But I noticed on nodejs.org website, that the latest release is 0.8.12, so do: sudo yum update nodejs I get Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos-mirror.jchost.net * epel: fedora-epel.mirror.lstn.net * extras: centos.mirror.lstn.net * updates: centos.mirror.lstn.net Setting up Update Process No Packages marked for Update What's the deal? Why doesn't yum find the latest version of node? Do I have to download the .tar.gz from nodejs.org and install it that way?

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  • The Spring 2010 Linux Distro Scorecard

    <b>Linux.com:</b> "Which Linux distro should I use? It's one of the most common questions for new and aspiring Linux users. There's so many to choose from, how can you pick the right one? Let's see if we can help clear it up a little and help you choose between all the other major distros."

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  • Maven Error - Expected START_TAG or END_TAG not TEXT

    - by onepotato
    I am setting up a spring mvc web application + hibernate jpa + maven from scratch using Eclipse Indigo. I am stuck in this error when doing a Maven build. [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error installing artifact's metadata: Error installing metadata: Error updating group repository metadata expected START_TAG or END_TAG not TEXT (position: TEXT seen ...<extension>war</... @13:25) [INFO] ------------------------------------------------------------------------ I tried googling but can't find a solution that works for me. I even search the whole project for the text <extension>war</ and mysteriously, there is no text like this in my project. However, in the tomcat web.xml there are a lot of <extension> tag, but I doubt that it has something to do in this error because I never touched that web.xml Here is my pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.mycompany.applicationname</groupId> <artifactId>Application MVC</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>Maven Application Webapp</name> <url>http://maven.apache.org</url> <properties> <spring.version>3.0.3.RELEASE</spring.version> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.hibernate.javax.persistence</groupId> <artifactId>hibernate-jpa-2.0-api</artifactId> <version>1.0.0.Final</version> </dependency> </dependencies> <build> <finalName>ApplicationName</finalName> </build> </project> As Funtik has suggested, I did a build with -X. Here is the stacktrace. [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error installing artifact's metadata: Error installing metadata: Error updating group repository metadata expected START_TAG or END_TAG not TEXT (position: TEXT seen ...<extension>war</... @13:25) [INFO] ------------------------------------------------------------------------ [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Error installing artifact's metadata: Error installing metadata: Error updating group repository metadata at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:499) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:478) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: Error installing artifact's metadata: Error installing metadata: Error updating group repository metadata at org.apache.maven.plugin.install.InstallMojo.execute(InstallMojo.java:143) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.artifact.installer.ArtifactInstallationException: Error installing artifact's metadata: Error installing metadata: Error updating group repository metadata at org.apache.maven.artifact.installer.DefaultArtifactInstaller.install(DefaultArtifactInstaller.java:91) at org.apache.maven.plugin.install.InstallMojo.execute(InstallMojo.java:105) ... 18 more Caused by: org.apache.maven.artifact.repository.metadata.RepositoryMetadataInstallationException: Error installing metadata: Error updating group repository metadata at org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.install(DefaultRepositoryMetadataManager.java:463) at org.apache.maven.artifact.installer.DefaultArtifactInstaller.install(DefaultArtifactInstaller.java:79) ... 19 more Caused by: org.apache.maven.artifact.repository.metadata.RepositoryMetadataStoreException: Error updating group repository metadata at org.apache.maven.artifact.repository.metadata.AbstractRepositoryMetadata.storeInLocalRepository(AbstractRepositoryMetadata.java:76) at org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.install(DefaultRepositoryMetadataManager.java:459) ... 20 more Caused by: org.codehaus.plexus.util.xml.pull.XmlPullParserException: expected START_TAG or END_TAG not TEXT (position: TEXT seen ...<extension>war</... @13:25) at org.codehaus.plexus.util.xml.pull.MXParser.nextTag(MXParser.java:1083) at org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader.parseVersioning(MetadataXpp3Reader.java:513) at org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader.parseMetadata(MetadataXpp3Reader.java:352) at org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader.read(MetadataXpp3Reader.java:866) at org.apache.maven.artifact.repository.metadata.AbstractRepositoryMetadata.updateRepositoryMetadata(AbstractRepositoryMetadata.java:98) at org.apache.maven.artifact.repository.metadata.AbstractRepositoryMetadata.storeInLocalRepository(AbstractRepositoryMetadata.java:68) ... 21 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2 seconds [INFO] Finished at: Thu Jun 27 17:36:23 SGT 2013 [INFO] Final Memory: 9M/16M [INFO] ------------------------------------------------------------------------ web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Adjustment Tool</display-name> <servlet> <servlet-name>mvc-dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvc-dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app> Any ideas?

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  • Export enviroment variable Mac

    - by mujer esponja
    Hello, I am starting with spring-roo, so I downloaded it and now I'm trying to export the variable. To get it, I tryed: PATH=$PATH:/Users/myUsr/spring-roo/bin export PATH PATH variable my-Name-3:~ myUsr$ echo $PATH /sw/bin:/sw/sbin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/X11R6/bin:/Users/myUsr/spring-roo/bin In this path (/Users/myUsr/spring-roo/bin), there is roo.sh But then, I can not run the command roo as it is suposed to be. Any idea?? Thanks in advance

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  • Correct way to persist Quartz triggers

    - by davioooh
    I'm quite new to Quartz and now I need to schedule some jobs in Spring Web App. I know about Spring + Quartz integration (I'm using Spring v 3.1.1) but I'm wondering if it's the right way to follow. In particular I need to persist my scheduled tasks in a DB so I can re-initialize them when application is restarted. Are there some utilities provided by Spring scheduling wrapper to do this? Can you suggest me some "well known" approach to follow?

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