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  • Splitting up a Rails/Ruby app onto multiple servers

    - by craig.kaminsky
    We recently moved a large application to two machines, both running the same codebase. I. Machine A Web server for public facing application Receives web hook call backs from our ESP Handles a few large, list-processing jobs (uploaded spreadsheets with data) II. Machine B Manages a massive set of (background) jobs but, primarily, focuses on building and assembling newsletters Runs all integration with our NetSuite platform Runs all system maintenance (read: DB) jobs To me, having these two apps running the same codebase (a large, monolithic Rails application) seems 'wrong'. I am wondering if anyone has advice on how to better break up the code for these two apps. While they both need the same DB and, ultimately, the same model code, Machine B has no need for Controllers and Views and it feels wasteful running a full-stack Rails app for its tasks. A couple things came to mind but I'm not sure if I'm trying to solve a problem that doesn't exist: Break the models out into a sub-module on git and include into both apps Build out the Mahcine B app in plain Ruby or a lighter framework like Sinatra (where I could use ActiveRecord with Sinatra in combo with a sub-module for the model folder). I'm new to this scenario and appreciate any and all feedback or direction! Thank you.

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  • Java web app, with plugin framework and ability to connect to source for updates

    - by lessthancommon
    I've searched all around for some good sources, but either have been searching for the wrong keywords, or I'm just missing something. I'm looking to redevelop a web app I've been using for some time now. Many parts are out of date, and we're constantly throwing in little hacks to attempt to give it new life. So what I'd like to do is re-engineer it from the ground up, built on some sort of plug-in framework. Before I continue, I'm more or less an intermediate Java programmer. In some ways, I'm hoping to use this project as a big learning experience. I've read a lot about OSGi, and it seems that's the most complete framework. Ideally, I would like an end result web app which I can run one instance as my hosting environment, and other instances can connect to it to grab new and updated plug-ins. Eventually I'll want to lock down these plug-ins based on some undecided criteria of who can get them (basically some will simply be updates, others will provide new functionality and should be "purchased" through an external system). But that will probably be handled in a later phase. There should be an administration view for managing bundles in a hot environment (looking to avoid having to restart the server for an update). I know all these things are possible, I'm just trying to find some good resources for reference. All the OSGi tutorials I'm finding seem to be too simplistic. If anyone here can guide me in the right direction on any or all of the items I'm looking for, it would be much appreciated. Also, this is my first post, so I'll take any comments/criticisms about the content of my post. Thanks!

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  • Best option for PDF viewer embedded in web app

    - by RationalGeek
    I have a web app that needs to be able to display a PDF. It needs to allow the user to page through the PDF, and my application needs to be able to know which page is currently being viewed, because other aspects of the web app will change based on the current page. Ideally it would not be dependent on the client having Adobe Reader but I could probably support that dependency. What are my best options for this? My application stack consists of ASP.NET 4 along with optionally Silverlight 5. Also, I could use something that is client-side based as well using JavaScript / HTML if such a thing exists. I found ComponentOne's offering for this and that seems like the leading candidate at this point, but I want to know if there are other options I should consider. Edit: Per Fosco's comment, converting the PDF to another format (such as HTML) might be an option, as long as I could tie back parts of the converted document to the original PDF page #s. Another note: this has to run entirely on our servers. It would not be acceptable to use a third-party service to view the PDFs.

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  • new project; entire node.js app

    - by Jared
    I have been looking into Node.js, express and Nowjs and love how easy it is to have real time interactions between clients. My background is mostly from CodeIgniter MVC using PHP and MYSql. I want to re make a current web project of mine from scratch to make everything better and more real time with this newer technology. After researching and doing test examples I want to use node.js , express and Nowjs for the real time interactions once someone connects to the socket.io to pull data back to clients. But use Code Igniter for the control of the site and user management , possible shopping cart/store , pretty much everything else. This is purely due to time constraints and that I am already familiar with doing it that way. I have been looking at MongoDB as an alternative to MySql, Basically the app is going to be multiple chat rooms all on one page. with the ability of notifications and private messaging. Lots of data transfer and images. before I started piecing it together I wanted to get people who have already done something similar. My model would use Code Igniter and MySQL to render the page and then connect them onto a node.js server and broadcast using express and nowjs would using a mongoDB be better than mySQL for tons of messages and data being stored or MYSQL? Also does it make since to not make the whole site on Node.js , kinda piece it together like that? I was asked to re post this somewhere else as it was not up to the format for SO, OP from here http://stackoverflow.com/questions/12649469/new-project-need-some-start-up-advice-node-js-app#comment17062924_12649469

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  • App to make a video from photos?

    - by chtfn
    I was wondering what could be a good app (with a GUI ;) ) for making a video from a bunch of photos or images, to create a time-lapse video, or a stop-motion animation, or even a video like this one. The idea is to set a really small time between each photo, but also to be able to change this time every so often, or add some effects, to make the succession smoother in particular. What would be perfect is a function that allows automatic cropping of the photos as well as exposure adjustment so they all have the same background and so the time-lapse video looks smoother. I know about the slide show app "Imagination" but the interval can not go under one second. Cheers! Edit: here is my progress, also thanks to the first answer: I tried Luciole, it is really simple and promessing, but pretty buggy, and I only could export an average video in .dv format (mpg2 and avi don't work). Apparently, it has difficulties when changing the fps. I also tried StopMotion: also pretty buggy, I had to go into preferences and modify the encoding commands to get a result, but it's the best result I got so far. But none of those has effects to make transitions smoother... I tried several diaporama apps: Imagination doesn't handle more than 1 image per second; PhotoFilmStrip (repo version and latest version from website): same problem even though you can go down to 0.1 second per image, it still behaves wierdly (going back to 1 second automatically); Videoporama: doesn't start at all on 12.04. Any other idea, folks?

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  • android app unable to connect to the hsqldb server

    - by Chinta
    I am trying to connect my android app to the hsql db server. Server runs on computer-1. I can connect to the db server from local machine through java as well as Db-visualizer. I can connect to the db server from another computer(computer-2) using Db-visualizer with comouter-1 ip address. Now trying to connect from my app in Nexus 7 the same way I was connecting from computer-2. I am getting "No Suitable Driver" error. Below is the log. 11-02 12:01:41.235: W/System.err(9803): connection string <jdbc:hsqldb:hsql://192.168.2.6:9001/qBank> 11-02 12:01:41.235: W/System.err(9803): user id string <SA> 11-02 12:01:41.235: W/System.err(9803): password string <> 11-02 12:01:41.235: W/System.err(9803): ERROR: failed to get connection. 11-02 12:01:41.235: W/System.err(9803): java.sql.SQLException: No suitable driver 11-02 12:01:41.235: W/System.err(9803): at java.sql.DriverManager.getConnection(DriverManager.java:186) 11-02 12:01:41.235: W/System.err(9803): at java.sql.DriverManager.getConnection(DriverManager.java:213) 11-02 12:01:41.235: W/System.err(9803): at com.scan.util.GatherData.getConnection(GatherData.java:135)

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  • Download Google+ Android App

    - by Gopinath
    You can access Google’s new social networking service,Google+, on your Android mobile phones using a native application. Google+ for mobile makes sharing the right things with the right people a lot simpler. Huddle lets you send super-fast messages to the people you care about most. With your permission, Instant Upload automatically puts the photos and videos you take into a private album in the cloud, so you can share them anytime, from anywhere. And no matter where you are, the stream lets you stay in the loop about what your friends are sharing and where they’re checking in. Here is a demonstration video of Google+ for Android. Google will release a native app for iPhone soon and there is no word on when they are going to release Google+ for other mobiles like Windows Phone 7, BlackBerry and Nokia. By the way you need invitation to access Google+ and you can request for one over here (more information on how to get Google+ Invite) Download Google+ for Android from Market Place This article titled,Download Google+ Android App, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • Identify high CPU consumed thread for Java app

    - by Vincent Ma
    Following java code to emulate busy and Idle thread and start it. import java.util.concurrent.*;import java.lang.*; public class ThreadTest {    public static void main(String[] args) {        new Thread(new Idle(), "Idle").start();        new Thread(new Busy(), "Busy").start();    }}class Idle implements Runnable {    @Override    public void run() {        try {            TimeUnit.HOURS.sleep(1);        } catch (InterruptedException e) {        }    }}class Busy implements Runnable {    @Override    public void run() {        while(true) {            "Test".matches("T.*");        }    }} Using Processor Explorer to get this busy java processor and get Thread id it cost lots of CPU see the following screenshot: Cover to 4044 to Hexadecimal is oxfcc. Using VistulVM to dump thread and get that thread. see the following screenshot In Linux you can use  top -H to get Thread information. That it! Any question let me know. Thanks

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  • 'Buy the app' landing page implementations

    - by benwad
    My site (using Django) has an app that I'm trying to push - I currently have a piece of middleware that redirects the user to a page advertising the app if they're accessing the page on the iPhone, then setting a cookie so that the user isn't bugged by the message every time they visit the site. This works fine, however checking the page with the mobile Googlebot checker shows that the Googlebot gets stuck in the redirect (since it doesn't store cookies) and therefore won't index the proper content. So, I'm trying to think of an alternative implementation that won't hurt the site's Google ranking and won't have any other adverse effects. I've considered a couple of options: Redirect (the current solution), but don't redirect if the user agent matches the Googlebot's UA string. This would be ideal, however I'm not sure if Google like their bot being treated differently from other users, and I'm afraid the site's ranking may be somehow penalised if I go ahead with this. Use a Javascript popup instead of a redirect. This would make sure the Googlebot finds the content it needs, however I envision this approach causing compatibility issues with the myriad mobile devices/browsers out there, and may affect the page load time. How valid are these options? And is there a better option for implementing this feature out there? I've tried researching this topic but surprisingly can't find any reputable-looking blog posts that explore this topic. EDIT: I posted this on SF because it seemed unsuitable for SO, but if there's another site that would be better for this issue then I'd be happy to move the question elsewhere.

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  • deploying titanium app on jailbroken iphone

    - by portoalet
    Hi, What do I need to do to deploy Titanium app into a jailbroken iPhone? I can deploy an XCode app into a jailbroken iphone by creating my own certificate. I tried packaging the KitchenSink app, but it came up with packaging error. I assume if I can get pass the packaging stage, I can just simply copy and paste the app file into my iPhone (following the previous iPhone guide) THanks

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  • How to run Django 1.3/1.4 on uWSGI on nginx on EC2 (Apache2 works)

    - by Tadeck
    I am posting a question on behalf of my administrator. Basically he wants to set up Django app (made on Django 1.3, but will be moving to Django 1.4, so it should not really matter which one of these two will work, I hope) on WSGI on nginx, installed on Amazon EC2. The app runs correctly when Django's development server is used (with ./manage.py runserver 0.0.0.0:8080 for example), also Apache works correctly. The only problem is with nginx and it looks there is something else wrong with nginx / WSGI or Django configuration. His description is as follows: Server has been configured according to many tutorials, but unfortunately Nginx and uWSGI still do not work with application. ProjectName.py: import os, sys, wsgi os.environ.setdefault("DJANGO_SETTINGS_MODULE", "ProjectName.settings") from django.core.wsgi import get_wsgi_application application = get_wsgi_application() I run uWSGI by comand: uwsgi -x /etc/uwsgi/apps-enabled/projectname.xml XML file: <uwsgi> <chdir>/home/projectname</chdir> <pythonpath>/usr/local/lib/python2.7</pythonpath> <socket>127.0.0.1:8001</socket> <daemonize>/var/log/uwsgi/proJectname.log</daemonize> <processes>1</processes> <uid>33</uid> <gid>33</gid> <enable-threads/> <master/> <vacuum/> <harakiri>120</harakiri> <max-requests>5000</max-requests> <vhost/> </uwsgi> In logs from uWSGI: *** no app loaded. going in full dynamic mode *** In logs from Nginx: XXX.com [pid: XXX|app: -1|req: -1/1] XXX.XXX.XXX.XXX () {48 vars in 989 bytes} [Date] GET / => generated 46 bytes in 77 m secs (HTTP/1.1 500) 2 headers in 63 bytes (0 switches on core 0) added /usr/lib/python2.7/ to pythonpath. Traceback (most recent call last): File "./ProjectName.py", line 26, in <module> from django.core.wsgi import get_wsgi_application ImportError: No module named wsgi unable to load app SCRIPT_NAME=XXX.com| Example tutorials that were used: http://projects.unbit.it/uwsgi/wiki/RunOnNginx https://docs.djangoproject.com/en/1.4/howto/deployment/wsgi/ Do you have any idea what has been done incorrectly, or what should be done to make Django work on uWSGI on nginx on EC2?

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  • Puppet master fails to run under nginx+passenger configuration as rack app, works when run as system service

    - by Anadi Misra
    I get the error [anadi@bangda ~]# tail -f /var/log/nginx/error.log [ pid=19741 thr=23597654217140 file=utils.rb:176 time=2012-09-17 12:52:43.307 ]: *** Exception LoadError in PhusionPassenger::Rack::ApplicationSpawner (no such file to load -- puppet/application/master) (process 19741, thread #<Thread:0x2aec83982368>): from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from config.ru:13 from /usr/local/lib/ruby/gems/1.8/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' from /usr/local/lib/ruby/gems/1.8/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' from config.ru:1:in `new' from config.ru:1 when I start nginx server with passenger module configured, puppet master configured to run through rack. here is the config.ru [anadi@bangda ~]# cat /etc/puppet/rack/config.ru # a config.ru, for use with every rack-compatible webserver. # SSL needs to be handled outside this, though. # if puppet is not in your RUBYLIB: #$:.unshift('/usr/share/puppet/lib') $0 = "master" # if you want debugging: # ARGV << "--debug" ARGV << "--rack" require 'puppet/application/master' # we're usually running inside a Rack::Builder.new {} block, # therefore we need to call run *here*. run Puppet::Application[:master].run and the nginx configuration for puppet master is as follows [anadi@bangda ~]# cat /etc/nginx/conf.d/puppet-master.conf server { listen 8140 ssl; server_name bangda.mycompany.com; passenger_enabled on; passenger_set_cgi_param HTTP_X_CLIENT_DN $ssl_client_s_dn; passenger_set_cgi_param HTTP_X_CLIENT_VERIFY $ssl_client_verify; access_log /var/log/nginx/puppet/master.access.log; error_log /var/log/nginx/puppet/master.error.log; root /etc/puppet/rack/public; ssl_certificate /var/lib/puppet/ssl/certs/bangda.mycompany.com.pem; ssl_certificate_key /var/lib/puppet/ssl/private_keys/bangda.mycompany.com.pem; ssl_crl /var/lib/puppet/ssl/ca/ca_crl.pem; ssl_client_certificate /var/lib/puppet/ssl/certs/ca.pem; ssl_ciphers SSLv2:-LOW:-EXPORT:RC4+RSA; ssl_prefer_server_ciphers on; ssl_verify_client optional; ssl_verify_depth 1; ssl_session_cache shared:SSL:128m; ssl_session_timeout 5m; } however when I run puppet through the ususal puppetmasterd daemon it works perfect with no errors. I can see somehow the nginx+passenger+rack setup fails to initialize while the same works when running the natvie puppetmaster daemon. Any configuration that I am missing?

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  • Reset push notification settings for app

    - by hanno
    I am developing an app with push notifications. To check all possible ways of user interaction, I'd like to test my app when a user declines to have push notifications enabled for my app during the first start. The dialog (initiated by registerForRemoteNotificationTypes), however, appears only once per app. How do I reset the iPhone OS's memory of my app. Deleting the app and reinstalling doesn't help.

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  • iPhone: launch image for tab app?

    - by Karsten Silz
    I have a tab-based iPhone app where I want to increase the perceived start-up speed with a launch image. As defined by the iPhone HIG, the launch image is a screenshot of your app (called Default.png) that is displayed immediately and looks very similar to the app's first screen (e.g., the screenshot of an empty table when the app displays a table first). Now the problem with a tab-based app is that users can rearrange the order of tabs so that any of the tabs may be the first tab to show upon launch. I think I read somewhere that you can't change the Default.png programmatically in your app, but I couldn't find that in the HIG (and the "Clock" app seems to do exactly that - having one launch image per tab). So, how do provide a launch image for a tab-based app?

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  • Using memcache to store obj's in google app engine.

    - by fredrik
    Hi, I'm trying to use memcache to cache data retrevied from the datastore. Storing stings works fine. But can't one store an object? I get an error "TypeError: 'str' object is not callable" when trying to store with this: pageData = PageType(page) memcache.add(memcacheid, pageData, 60) I've read in the documentation that it requires "The value type can be any value supported by the Python pickle module for serializing values." But don't really understand what that is. Or how to convert pageData to it. Any ideas? ..fredrik

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  • IPhone app with SSL client certs

    - by Pavel Georgiev
    I'm building an iphone app that needs to access a web service over https using client certificates. If I put the client cert (in pkcs12 format) in the app bundle, I'm able to load it into the app and make the https call (largely thanks to stackoverflow.com). However, I need a way to distribute the app without any certs and leave it to the user to provide his own certificate. I thought I would just do that by instructing the user to import the certificate in iphone's profiles (settings-general-profiles), which is what you get by opening a .p12 file in Mail.app and then I would access that item in my app. I would expect that the certificates in profiles are available through the keychain API, but I guess I'm wrong on that. 1) Is there a way to access a certificate that I've already loaded in iphone's profile in my app? 2) What other options I have for loading a user specified certificate in my app? The only thing I can come up with is providing some interface where the user can give an URL to his .p12 cerificate, which I can then load into the app's keychain for later use, but thats not exactly user-friednly. I'm looking for something that would allow the user to put the cert on phone (email it to himself) and then load it in my app.

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  • how to dispose a incoming email and then send some words back using googe-app-engine..

    - by zjm1126
    from google.appengine.api import mail i read the doc: mail.send_mail(sender="[email protected]", to="Albert Johnson <[email protected]>", subject="Your account has been approved", body=""" Dear Albert: Your example.com account has been approved. You can now visit http://www.example.com/ and sign in using your Google Account to access new features. Please let us know if you have any questions. The example.com Team """) and i know hwo to send a email using gae ,but how to check a email incoming, and then do something thanks

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  • How do you Access an Authenticated Google App Engine Service with Ruby?

    - by viatropos
    I am trying to do this same thing here but with Ruby: Access Authenticated GAE Client with Python. Any ideas how to retrieve authenticated content from GAE with Ruby? I am using the Ruby GData Gem to access everything in Google Docs and such and it's making life very easy, but now I'd like to access things on GAE that require admin access, programmatically, and it doesn't support that. Here's what I'm getting (using DocList, not sure what to use yet): c = GData::Client::DocList.new c.clientlogin(username, password, nil, nil, nil, "HOSTED") c => #<GData::Client::DocList:0x201bad8 @clientlogin_service="writely", @version="2", @auth_handler=#<GData::Auth::ClientLogin:0x200803c @account_type="HOSTED", @token="long-hash", @auth_url="https://www.google.com/accounts/ClientLogin", @service="writely">, @source="AnonymousApp", @headers={"Authorization"=>"GoogleLogin auth=long-hash", "User-Agent"=>"GoogleDataRubyUtil-AnonymousApp", "GData-Version"=>"2", "Content-Type"=>"application/atom+xml"}, @authsub_scope="http://docs.google.com/feeds/", @http_service=GData::HTTP::DefaultService> url = "http://my-cdn.appspot.com/files/restricted-file.html" c.get(url) => #<GData::HTTP::Response:0x20004b8 @status_code=302, @body="", @headers={"connection"=>"close", "date"=>"Sun, 11 Apr 2010 00:30:20 GMT", "content-type"=>"text/html", "server"=>"Google Frontend", "content-length"=>"0", "location"=>"https://www.google.com/accounts/ServiceLogin service=ah&continue=http://my-cdn.appspot.com/_ah/login%3Fcontinue%3D http://my-cdn.appspot.com/files/restricted-file.html& ltmpl=gm&ahname=My+CDN&sig=a-signature"}> Any tips? That other SO question pointed to doing something with the redirect... Not sure how to handle that. Just looking for a point in the right direction from the ruby experts. Thanks.

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  • Offline iOS web app: loads my manifest, but doesn't work offline

    - by Ken
    I'm writing a web app to be used offline on iOS. I've created a manifest, am serving it up as text/cache-manifest, and it usually works fine, when running inside Safari. If I add it as an app to my home screen, then turn on Airplane mode, it can't open the app at all -- I get an error and it offers to close the app. (I thought this was the entire purpose of an offline app!) When I load the app a first time when online, I can see in my logs that it's requesting every page listed in the manifest. If I turn off Airplane mode, and load the app, I can see the first file it's requesting is my main.html file (which is both listed in the manifest, and has the manifest=... attribute). It then requests the manifest, and all my other files, getting 200's for all (and 304's for anything requested a second time during this load). When I load the page in Chrome, and click around, the logs show the only thing it's trying to reach on the server is "/favicon.ico" (which is a 404, and which I don't think iOS Safari tries to load, anyway). All of the files listed in the manifest are valid and served without error. The Chrome inspector lists, under "APPLICATION CACHE", all the cached files I've listed which I expect. The entire set of files is about 50 KB, way under any limit on offline resources that I've found. Is this supposed to work, i.e., am I supposed to be able to create an offline iOS app using only HTML/CSS/JS? And where do I go about figuring out why it's failing to work offline? (Related but doesn't sound quite the same to me, since it's about Safari and not a standalone app: "Can't get a web app to work offline on iPod")

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  • Google App Engine - Memcache - Java version of Python's client.add?

    - by Spines
    The python interface to the memcache has an add method: add(key, value, time=0, min_compress_len=0, namespace=None) Sets a key's value, if and only if the item is not already in memcache. ... The return value is True if added, False on error. So with this you can add an item if it doesn't exist, and see if it previously existed by the return value. The java memcache api equivalent for this doesn't let you know if there was a previous value or not: put(key, value, expiration, MemcacheService.SetPolicy.ADD_ONLY_IF_NOT_PRESENT); MemcacheService.SetPolicy.ADD_ONLY_IF_NOT_PRESENT: add the value if no value with the key, do nothing if the key exists Is there a way to know if a previous value existed or not with the java api? I can't just check with the contains method beforehand, because in between the call to contains and the call to put, another JVM instance could modify the memcache.

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  • Google App Engine JDO how to define class fields ?

    - by Frank
    I have a class like this : import java.io.*; import java.util.*; public class Contact_Info_Entry implements Serializable { public static final long serialVersionUID=26362862L; String Contact_Id,First_Name="",Last_Name="",Company_Name="",Branch_Name="",Address_1="",Address_2="",City="",State="",Zip="",Country="",E_Mail="",Phone; int I_1,I_2; float F_1,F_2; boolean B_1,B_2; GregorianCalendar Date_1, Date_2; Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } If I want to translate it to a class for JDO, do I need to define each field by it self or can I do a group at a time ? For instance do I have to make it like this : @PersistenceCapable(identityType=IdentityType.APPLICATION) public class Contact_Info_Entry implements Serializable { @PrimaryKey @Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY) private Long id; @Persistent public static final long serialVersionUID=26362862L; @Persistent String Contact_Id; @Persistent String First_Name; @Persistent String Last_Name; ...... @Persistent int I_1; @Persistent int I_2; ... @Persistent float F_1; ... @Persistent boolean B_1; @Persistent boolean B_2; @Persistent GregorianCalendar Date_1; ... @Persistent Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } Or can I do a group at a time like this : @PersistenceCapable(identityType=IdentityType.APPLICATION) public class Contact_Info_Entry implements Serializable { @PrimaryKey @Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY) private Long id; @Persistent public static final long serialVersionUID=26362862L; @Persistent String Contact_Id,First_Name,Last_Name=""; ...... @Persistent int I_1=0,I_2=1; ... @Persistent float F_1; ... @Persistent boolean B_1,B_2; @Persistent GregorianCalendar Date_1; ... @Persistent Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } Or can I skip the "@Persistent" all together like this : import java.io.*; import java.util.*; @PersistenceCapable(identityType=IdentityType.APPLICATION) public class Contact_Info_Entry implements Serializable { public static final long serialVersionUID=26362862L; String Contact_Id,First_Name="",Last_Name="",Company_Name="",Branch_Name="",Address_1="",Address_2="",City="",State="",Zip="",Country="", E_Mail="",Phone; int I_1,I_2; float F_1,F_2; boolean B_1,B_2; GregorianCalendar Date_1, Date_2; Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } Which are correct ? Frank

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  • In Google App Engine, what is the simplest way to keep a record of items that you have put into memc

    - by Chris Boesch
    I am starting to use memcache more frequently to avoid having to recalculate things between page requests. When the memcache periodically clears, as it is designed to do, I have to start all over rebuilding various items that I have placed in memcache. What I would like to do is create a very simple model that enables me to periodically save the items that I put into memcache based on the memcache keys that I'm using along with a datetime that is related to the data being memcached. What is the best way to do this? I'm looking for something like this: class MemcacheRecord(db.Model): key = db.StringProperty(required=True) value = #Something that can store whatever memcache can validThru = db.DateTimeProperty(required=True) def set(self, key, value, validThru): #Save a new memcache record newMemcacheRecord = MemcacheRecord(key=key, value=value, validThru=validThru) .. return True # or False def get_latest(self, key): #Get the memcache record with the most recent validThru datetime latestMemcacheRecord = MemcacheRecord.all().order('-validThru').get() return {'validThru':latestMemcacheRecord.validThru, 'value':latestMemcachRecord.value}

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  • Google App Engine JDO how to define instance fields ?

    - by Frank
    I have a class like this : import java.io.*; import java.util.*; public class Contact_Info_Entry implements Serializable { public static final long serialVersionUID=26362862L; String Contact_Id,First_Name="",Last_Name="",Company_Name="",Branch_Name="",Address_1="",Address_2="",City="",State="",Zip="",Country="",E_Mail="",Phone; int I_1,I_2; float F_1,F_2; boolean B_1,B_2; GregorianCalendar Date_1, Date_2; Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } If I want to translate it to a class for JDO, do I need to define each field by it self or can I do a group at a time ? For instance do I have to make it like this : @PersistenceCapable(identityType=IdentityType.APPLICATION) public class Contact_Info_Entry implements Serializable { @PrimaryKey @Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY) private Long id; @Persistent public static final long serialVersionUID=26362862L; @Persistent String Contact_Id; @Persistent String First_Name; @Persistent String Last_Name; ...... @Persistent int I_1; @Persistent int I_2; ... @Persistent float F_1; ... @Persistent boolean B_1; @Persistent boolean B_2; @Persistent GregorianCalendar Date_1; ... @Persistent Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } Or can I do a group at a time like this : @PersistenceCapable(identityType=IdentityType.APPLICATION) public class Contact_Info_Entry implements Serializable { @PrimaryKey @Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY) private Long id; @Persistent public static final long serialVersionUID=26362862L; @Persistent String Contact_Id,First_Name,Last_Name=""; ...... @Persistent int I_1=0,I_2=1; ... @Persistent float F_1; ... @Persistent boolean B_1,B_2; @Persistent GregorianCalendar Date_1; ... @Persistent Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } Or can I skip the "@Persistent" all together like this : import java.io.*; import java.util.*; @PersistenceCapable(identityType=IdentityType.APPLICATION) public class Contact_Info_Entry implements Serializable { public static final long serialVersionUID=26362862L; String Contact_Id,First_Name="",Last_Name="",Company_Name="",Branch_Name="",Address_1="",Address_2="",City="",State="",Zip="",Country="", E_Mail="",Phone; int I_1,I_2; float F_1,F_2; boolean B_1,B_2; GregorianCalendar Date_1, Date_2; Vector<String> A_Vector=new Vector<String>(); public Contact_Info_Entry() { } ...... } Which are correct ? Frank

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