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• Using XML in a Flex Website to Improve SEO

  - by Laxmidi

  Hi, I've got a Flex 3 site called www.brainpinata.com that's a trivia game. Basically, everything in the site is pulled from a database-- the questions, choices, and answers. So, unfortunately, Google doesn't index my content. So, I'm trying to think of ways to improve the situation: A) If I took my database data and put it in an XML file which was in the website's root directory, would this work? Would it violate any Google policy? (The info would be the same as in the db-- so nothing shady.) Would I have to "wire" the XML into my site or would it be enough to just have the XML sitting in the root directory? B) Another idea is to use the noscript tag and load the XML content there. As I understand it Google indexes content that people who have Javascript turned off would see. I know Flex/Actionscript 3, and unfortunately, I don't know how to load XML content with HTML. Does anyone know of an example where a Flex site uses XML for the noscript content? Thank you. -Laxmidi

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• What should be the architecture of an urban game system?

  - by pmichna

  I'm going to develop an urban game using a telco API for phone geolocation and sending/receiving messages. A player would pick up one of the scenarios, move around the city and when he hits a given location, he gets a message and possibly has to answer it. I'm wondering, what approach would be the best in my case. I came up with this general idea: Web application as a user interface (user registration, players ranking, scenarios editing) written in Ruby on Rails. Game server (hosting games, game logic like checking players location, sending and receiving messages) written in Ruby. Database (users, scores, scenarios etc.), probably MySQL or someother open source DB. I want to learn Ruby and RoR, that's why I chose these language and framework. Do you think it's a good choice for a game server? Another question: is this project division good? I mean, I have little experience with Ruby and Rails - that's why I'm asking. Maybe it's better to have web application merged with game server and somehow have the server hosting RoR application do the tasks like mobile phone pinging and message sending? How would that be performed? Maybe this is worth mentioning: the API is RESTful, most results are JSON, few are XML.

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• Please recommend a patterns book for iOS development

  - by Brett Ryan

  I've read several books on iOS development and Objective-C, however what a lot of them teach is how to work with interfaces and all contain the model inside the view controller, i.e. a UITableViewController based view will simply have an NSArray as it's model. I'm interested in what the best practices are for designing the structure of an application. Specifically I'm interested in best practices for the following: How to separate a model from the view controller. I think I know how to do this by simply replacing the NSArray style example with a specific model object, however what I do not know how to do is alert the view when the model changes. For example in .NET I would solve this by conforming to INotifyPropertyChanged and databinding, and similarly with Java I would use PropertyChangeListener. How to create a service model for my domain objects. For example I want to learn the best way to create a service for a hypothetical Widget object to manage an internal DB and also services for communicating with remote endpoints. I need to learn the best ways to do this in a way that interface components can subscribe to events such as widgetUpdated. These services should be singleton classes and some how dependency injected into model/controller objects. Books I've read so far are: Programming in Objective-C (4th Edition) Beginning iOS 5 Development: Exploring the iOS SDK The iOS 5 Developer's Cookbook: Expanded Electronic Edition: Essentials and Advanced Recipes for iOS Programmers Learn Objective-C on the Mac: For OS X and iOS I've also purchased the following updated books but not yet read them. The Core iOS 6 Developer's Cookbook (4th edition Programming in Objective-C (5th Edition) I come from a Java and C# background with 15 years experience, I understand that many of the ways I would do things in these languages may not fit to the ObjC way of developing applications. Any guidance on the topic is very much appreciated.

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• Which tools you use for development in your company?…Please be exact [closed]

  - by predrag.music

  If you are a professional php/(my/postgre/?)sql/? developer and working in a professional team ... I would like to know which tools you use for development in your company. I do not care which tool is better or worse, but "which tools you use", if it is not a TOP SECRET :) For example, these are just some of the tools i/we use (first those used most (in general)): Pen, paper lots of cofee, cola ... let me think ... mmmm ... yeah more cofee :) All kinds of books (a lots of books) OS: Win / MacOS X Server: Hosted (CentOS )/ At work Mac OS X Dev server: XAMPP / MAMP / LAMP Editor: Notepad++ IDE: Netbeans / Zend Studio / Eclipse Version Control System: Mercurial / SVN FTP: Filezilla mostly / ... Passwords: KeePass js / ajax: jQuery / pure js / jQuery UI Framework:CI / Zend / pure php Database: MySQL / Other ORM: Framework layer db (Not an ORM I know but...) / Doctrine (2) / no ORM Debugging: Xdebug (PHP) / firebug (ajax/js/html/css/...) / framework profiler (stuff) / ... (x) Dreaming: About... Thinking: Not about chaos in ? direction .... n Anything else that comes to mind n+1 Zilion other stuff i know but i can't remember ... 8 some other stuff i (don't) remember i forgot, give up, delete, lost, said to myself never again, i haven't had time stuff, have on computer stuff but can't find or don't even know i have it on my computer at least 2-3 or more times, stuff I said to myself i'll check later and never checked again for all sort of "perfectly justified" reasons (time, memory, wife :), whatever,...), ... what is the reason i'm asking this?:) 8 and beyond looking forward to see a lot of answers ?

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• Highly scalable and dynamic "rule-based" applications?

  - by Prof Plum

  For a large enterprise app, everyone knows that being able to adjust to change is one of the most important aspects of design. I use a rule-based approach a lot of the time to deal with changing business logic, with each rule being stored in a DB. This allows for easy changes to be made without diving into nasty details. Now since C# cannot Eval("foo(bar);") this is accomplished by using formatted strings stored in rows that are then processed in JavaScript at runtime. This works fine, however, it is less than elegant, and would not be the most enjoyable for anyone else to pick up on once it becomes legacy. Is there a more elegant solution to this? When you get into thousands of rules that change fairly frequently it becomes a real bear, but this cannot be that uncommon of a problem that someone has not thought of a better way to do this. Any suggestions? Is this current method defensible? What are the alternatives? Edit: Just to clarify, this is a large enterprise app, so no matter which solution works, there will be plenty of people constantly maintaining its rules and data (around 10). Also, The data changes frequently enough to say that some sort of centralized server system is basically a must.

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• RMS java web framework

  - by Kamil Tomšík

  We're currently reconsidering technologies and frameworks to get more agile with "simple" RMS CRUD-based projects. In short, short-living things like this Right now we have custom extension on top of SmartGWT but after some time it has proven not to be enough flexible. I also personally dislike that java-js compilation process and the whole GWT codebase. Not only its ugly designed, it also makes certain low-level js things very complicated if not completely impossible. So what I'm looking for is: closest to web as possible, like JSF or possibly Tapestry, it is very important to be able get "low" and weave framework if necessary. Happens more often than we thought. datagrid capable - Ext.js & PrimeFaces looks pretty good, Vaadin does too. db-schema generators (optional, no matter in which way) If it were only on me, I'd probably stick to Ext.js + custom rest-based java solution, possibly generated from database schema (not sure about concrete tooling yet) I only does have experience with vanilla Ext.js, vanilla GWT and JSF 2.0 / Seam, so it kinda hard for me to judge or even propose other frameworks. What would be your proposition? What are the problems you've faced, what was your solution and how hard do you think it was to deal with them in "big picture"?

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• How to deal with colleagues refuse to follow practices?

  - by Adrian Shum

  I was discussing with another colleague about what we should be used when an DB entity is referring to another. I don't think there is any good reason to break the practice of putting the Primary Key in the referring entity. However, one of my colleague says: "You should use a surrogate key in the entity, but it is better to put the human-readable natural key in the referring entity. As long it is unique, it is fine and it is easier when you are doing support or maintenance job" I know it will works, but obviously it is not a good practice you are putting a non-PK unique column as "foreign key", just for gaining a bit of ease in writing SQL during support as we can have less table join. Though I mentioned the his approach is conceptual incorrect, and causing problem too practically etc, he seems rather trade off correctness in data model in exchange of ease of maintenance. And he said: "I know it is not good practice, but good practice is not golden rule" Honestly I feel frustrated when dealing with something like this. I know there are always case that we should break some rule or practice, but doubtless it is not such case now. What will you when you are facing situation like this? Please assume yourself being a senior developer which is expected to contribute in misc development direction and convention.

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• Site in subdomain (MaraDNS + Nginx)

  - by Grzegorz

  Welcome, Actually I'm doing some experiments on my VPS with Ubuntu. I've installed MaraDNS with Nginx. At this moment I've correctly launch static site which is available from Internet (maindomain.com). In next step I want to add new site which will be available in subdomain, for example dev.maindomain.com. I've tried to db.maindomain.com file (used by MaraDNS): maindomain.com. xxx.xxx.xxx.xxx www.maindomain.com. CNAME maindomain.com. dev.maindomain.com. xxx.xxx.xxx.xxx Where xxx.xxx.xxx.xxx is VPS IP address. In nginx.conf I have: server { listen 80; server_name maindomain.com; access_log /var/log/nginx/maindomain.com.log location / { root /var/www/maindomain.com; index index.html; } } server { listen 80; server_name dev.maindomain.com; access_log /var/log/nginx/dev.maindomain.com.log location / { root /var/www/dev.maindomain.com; index index.html; } } With this configuration maindomain.com works properly, but dev.maindomain.com isn't available. When I try: ping dev.maindomain.com then I get my xxx.xxx.xxx.xxx IP. Do you have any suggestions how can I resolve this problem?

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• Amazon how does their remarkable search work?

  - by JonH

  We are working on a fairly large CRM system /knowledge management system in asp.net. The db is SQL server and is growing in size based on all the various relationships. Upper management keeps asking us to implement search much like amazon does. Right from there search you can specify to search certain objects like outdoor equipment, clothing, etc. and you can even select all. I keep mentioning to upper management that we need to define the various fields to search on. Their response is all fields...they probably look at the search and assume that it is so simple. I'm the guy who has to say hold on guys we are talking about amazon here. My question is how can amazon run a search on an "all" category. Also one of the things management here likes is the dynamic filters. For instance, searching robot brings up filters specific to a robot toy. How can I put management in check and at least come up with search functionality that works like amazon. We are using asp.net, SQL server 2008 and jquery.

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• Can AJAX in a CMS slow down your server

  - by Saif Bechan

  I am currently developing some plugins for WordPress, and I was wondering which route to take. Let's take an example, you want to display the last 3 tweets on your page. Option 1 You do things the normal way inside WordPress. Someone enters the website, while generating the page, you fetch the tweets in php via the twitter api, and just display them where you want. Now the small problem with this is, that you have to wait for the response from twitter. This takes a few ms. NO real problem, but this is question is just out of curiosity. Option 2 Here you don't do anything in WordPress on the initial load, but you do have the API inside. Now you just generate the page, and as soon as the page is done on the client side, you do a small AJAX call back to the server via a WordPress plugin, to fetch your latest tweets. Also called asynchronously. Now the problem with this IMO is that you have much more stress on your server. For starters you have two HTTP requests instead of one. Secondly the WordPress core has to load two times instead of one. Other options Now I know there are a lot of other options: 1) Getting the tweets directly via javascript, no stress on the server at all. 2) Cache the tweets so they are fetched from the DB instead of using the API every time. 3) Getting the tweets from an ajax call that is not a WordPress plugin. 4) Many more. My Question Now my question is if you only compare 1 and 2, which would be a better choice.

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• Running Non-profit Web Applications on Cloud/Dedicated Hosting [closed]

  - by cillosis

  Possible Duplicate: How to find web hosting that meets my requirements? I often times build web applications purely because I enjoy it. I like building useful tools or open source applications that don't come with a price tag. That being said, many of these applications can be quite complex requiring services beyond shared hosting (ex. specific PHP extensions). This leaves me with two options: Make the web application less complex and run on shared hosting. Fork out money for cloud or dedicated/VPS hosting. Considering the application is free (I don't make money off of it intentionally), the money for hosting comes out of my own pocket. I know I am not alone in this sticky situation. So the question is, what are the hosting options that provide more advanced features such as shell access via SSH, ability to install specific software/extensions (ex. if I wish to use a NoSQL DB such as Redis, MongoDB, or Cassandra), etc., at a free or low price point? I know free usually equates to bad/unreliable hosting -- but it's not always the case. There are a couple providers with free plans I know of: Amazon EC2 - Free micro-instance for 1 year AppHarbor - Cloud based .NET web application hosting w/ free plan. What else is available for hosting of non-profit applications?

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• 150????????????????~2010?11??????????(????)

  - by Yusuke.Yamamoto

  2010?11???????????(????)?????????????????? ???????????Oracle Database 10g Release 2(10gR2)? Microsoft Windows Server 2008 R2 ?? Windows 7 ????????? ?????????????SQL Developer???????? ???????????????????????????? Oracle SQL Developer ?????150????????????????????? ????????????????????????????????????????? ?? ???? ???? ??? ??? Oracle 10gR2?Windows 2008R2/Windows 7??????? ??? ?????? Oracle???????·??????(????)??(2010?10?) ??? SQL Developer SQL Developer????~??!????????SQL???? New! ??? ????? Oracle ASM?1???? - ????????????·?????·?? ??? ??? ??????????????~2010?10??????????(???) New! ??? ??? Oracle?????(11gR2)????~DB??????·????????????! ??? ??????? LIKE??(?????????)??????????~Oracle Text????? ??? ??????? SQL*Loader???? New! ??? ??????·???? Oracle????????(2010?9?) ??? ??????? Oracle?????~??????????????????????3????????? New!

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• Development environment to manage multiple Oracle databases

  - by jkohlhepp

  I am in an enterprise environment where we have applications that need to run against multiple Oracle databases. Developers may need to manage multiple vintages of these databases to support different test data or diagnose bugs against different versions of the code. Right now, we have a limited set of test environments set up on "real" Oracle servers within the data center. We juggle these among development and QA groups and there is a lot of conflicts and inefficiencies that arise because of it. I am taking a look at Oracle Express Edition which would allow me to spin up a local Oracle database. This is similar to the workflow I most often see with SQL Server. Devs work on their location machine until they are ready to integration and then they push their DB changes to integration / QA environments. However, from what I read it seems that Oracle XE only supports one database instance at a time. So if I have an application that utilizes two different databases, I can't have both of them running on my local machine. Is that correct? Does Oracle Standard or Personal editions get around this limitation? If I had one of those installed locally, how difficult would it be to get multiple databases working on the same development machine? How do dev shops handle developing against Oracle where they need to be using several different Oracle instances for their applications?

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• Intel 82576 Network card

  - by No1_Melman

  I have an Intel dual port pcie NIC card with two 82576 interfaces according to ubuntu 12.04. I run the command sudo lshw -html > /home/melman/Documents/hardware.html and it shows both of the interfaces but they're grayed out?! How can enable them? ifconfig output: bond0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:192.168.100.2 Bcast:192.168.100.255 Mask:255.255.255.0 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) eth0 Link encap:Ethernet HWaddr e0:69:95:d1:db:ff inet addr:192.168.10.63 Bcast:192.168.10.255 Mask:255.255.255.0 inet6 addr: fe80::e269:95ff:fed1:dbff/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2903 errors:0 dropped:0 overruns:0 frame:0 TX packets:2627 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1524738 (1.5 MB) TX bytes:430196 (430.1 KB) Interrupt:20 Memory:f7f00000-f7f20000 eth3 Link encap:Ethernet HWaddr 00:50:b6:50:a7:f9 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) eth4 Link encap:Ethernet HWaddr 00:1b:21:6e:99:77 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Memory:f7c00000-f7c20000 eth5 Link encap:Ethernet HWaddr 00:1b:21:6e:99:76 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Memory:f7c20000-f7c40000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:246 errors:0 dropped:0 overruns:0 frame:0 TX packets:246 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:17584 (17.5 KB) TX bytes:17584 (17.5 KB)

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• Declarative View Objects (VOs) for better ADF performance

  - by Shay Shmeltzer

  Just got back from ODTUG's kscope13 conference which had a lot of good deep ADF content. In one of my session I ran out of time to do one of my demos, so I wanted to share it here instead. This is a demo of how Declarative View Objects can increase your application's performance. For those who are not familiar with declarative VOs, those are VOs that don't actually specify a hard coded query. Instead ADF creates their query at runtime, and it does it based on the data that is requested in your UI layer. This can be a huge saver of both DB resources and network resources. More in the documentation. Here is a quick example that shows you how using such a VO can automatically switch to a simpler SQL instead of a complex join when needed. (note while I demo with 11.1.2.* the feature is there in 11.1.1.* versions also). The demo also shows you how you can monitor the SQL that ADF BC issues to the database using the WebLogic logging feature in JDeveloper. As a side note, I would have loved to see more ADF developers attending Kscope. This demo was part of the "ADF intro" track at Kscope, In the advanced ADF track you would have been treated to a full tuning session about ADF with lots of other tips. Consider attending Kscope next year - it is going to be in Seattle this time.

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• OWB/ODI Users: Last Chance to Submit and Vote On Sessions for OpenWorld 2010

  - by antonio romero

  Now is the last chance for OWB and ODI users to propose new ETL/DW/DI sessions for OpenWorld! Oracle OpenWorld 2010 "Suggest a Session" lets members of the Oracle Mix community submit and vote on papers/talks for OpenWorld. The most popular session proposals will be included in the conference program. One promising OWB-related topic has already been submitted: Case Study: Real-Time Data Warehousing and Fraud Detection with Oracle 11gR2 Dr. Holger Friedrich and consultants from sumIT AG in Switzerland built a real-time data warehouse and accompanying BI system for real-time online fraud detection with very limited resources and a short schedule. His presentation will cover: How sumIT AG efficiently loads complex data feeds in real time in Oracle 11gR2 using, among others, Advanced Queues and XML DB How they lowered costs and sped up development, by leveraging the DBs development features including Oracle Warehouse Builder How they delivered a production-ready solution in a few short months using only three part-time developers Come vote for this proposal, on Oracle Mix: https://mix.oracle.com/oow10/proposals/10566-case-study-real-time-data-warehousing-and-fraud-detection-with-oracle-11gr2  I have already invited members of the OWB/ODI Linkedin group (with over 1400 members) to come vote on topics like this one and propose their own. If enough of us vote on a few topics, we are sure to get some on the agenda!  And if you have your own topics, using the Suggest-a-Session instructions here: http://wiki.oracle.com/page/Oracle+OpenWorld+2010+Suggest-a-Session If you propose a topic, don't forget to come to Linkedin and promote it! I have already sent the members of the Linkedin group an email announcement about this, and I will send another in a week, with links to all topics submitted. Thanks, all!

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• Use Enterprise Manager Cloud Control to monitor OBIEE 11.1.1.7.x Dashboards

  - by Torben Hein -Oracle

  (in via Senthil )  If your OBIEE 11.1.1.7.x is set up in the following way: The OBIEE repository is an Oracle Database and is set up as a data warehouse Usage tracking is enabled in OBIEE. ( For information on how to enable usage tracking in OBIEE, refer to the following link: Setting Up Usage Tracking in Oracle BI 11g ) The OBIEE instance is discovered in EM Cloud Control. ( For information on how to discover an OBIEE instance in Cloud Control, refer to the following link: Discovering Oracle Business Intelligence Instance and Oracle Essbase Targets ) The OBIEE repository is discovered in EM Cloud Control. ( For information on how to discover an Oracle database, refer to the following link: Discovering, Promoting, and Adding Database Targets ) then we've got news for you: KM Article:  OBIEE 11g: How To Diagnose Slowly Performing Dashboards using Enterprise Manager Cloud Control (Doc ID 1668236.1) takes you step by step through monitoring the SQL query performance behind your OBIEE dashboard. This Diagnostic approach ... .. will help you piece together information on BI dashboard performance, e.g. processing time from the different layers of the BI system including the repository. .. should enable you to get to the bottom of slow dashboards by using the wealth of information available in EM Cloud Control on OBIEE and Oracle DB. .. will NOT fix any performance issues on its own, but will help identify bottlenecks while processing dashboard requests. (layout and post: Torben, authorized: Lia)

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• Combo/Input LOV displaying non-reference key value

  - by [email protected]

  Its a very common use-case of LOV that we want to diplay a non key value in the LOV but store the key value in the DB. I had to do the same in a sample application I was building. During implementation of this, I realized that there are multiple ways to achieve this.I am going to describe each of these below.Example : Lets take an example of our classic HR schema. I have 2 tables Employee and Department where Dno is the foreign key attribute in Employee that references Department table.I want to create a LOV for Deparment such that the List always displays Dname instead of Dno. However when I update it, it it should update the reference key Dno.To achieve this I had 3 alternative1) Approach 1 :Create a composite VO and add the attributes from Department into Employee using a join.Refer the blog http://andrejusb.blogspot.com/2009/11/defining-lov-on-reference-attribute-in.htmlPositives :1. Easy to implement and use.2. We can use this attribute directly in queries defined on new attribute i.e If i have to display this inside query panel.Negative : We have to create an additional Join on the VO.Ex:SELECT Employees.EMPLOYEE_ID,        Employees.FIRST_NAME,        Employees.LAST_NAME,        Employees.EMAIL,        Employees.PHONE_NUMBER,       Department.Dno,        Department.DnameFROM EMPLOYEES Employees, Department Department WHERE Employees.Dno = Department .Dno2) Approach 2 :

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• Oracle Developer Days 2013

  - by Anne Manke

  Die Oracle Datenbank in der Praxis Was steckt in den Editionen? Einsatzgebiete, Tipps und Tricks zum Mitnehmen, inkl. Ausblick auf neue Funktionen Die Einsatzgebiete für die Oracle Datenbank sind vielfältig, und so bietet Oracle seine marktführende Datenbank in unterschiedlichen Editionen an. Über 30 Jahre Erfahrung in der Weiterentwicklung haben zu einer Fülle von nützlichen Features geführt, welche in den verschiedenen Ausführungen sinnvoll aufgeteilt sind. Ein Ausblick auf die Funktionen der für 2013 geplanten neuen Datenbank-Version rundet den Workshop ab. In dieser speziell von der BU DB zusammengestellten Veranstaltung werden wir Sie neben vielen Tipps und Tricks zu folgenden Themen auf den neuesten Stand bringen: Die Unterschiede der Editionen und ihre Geheimnisse Umfangreiche Basisausstattung auch ohne Option Performance und Skalierbarkeit in den einzelnen Editionen Kosten- und Ressourceneinsparung leicht gemacht Sicherheit in der Datenbank Steigerung der Verfügbarkeit mit einfachen Mitteln Der Umgang mit großen Datenmengen Cloud Technologien in der Oracle Datenbank Termine 23.01.2013: Oracle Niederlassung Stuttgart Liebknechtstr. 35 D-70565 Stuttgart [Anmeldung per Email] 30.01.2013: Oracle Niederlassung Potsdam Schiffbauergasse 14 D-14467 Potsdam [Anmeldung per Email] 05.02.2013: Oracle Niederlassung Düsseldorf Hamborner Str. 51 D-40472 Düsseldorf [Anmeldung per Email] Anmeldung Melden Sie sich noch heute zur Veranstaltung an - die Teilnahme ist kostenlos! Per Mail an Barbara Frank, ORACLE Deutschland B.V. & Co KG Per Telefon: +49 (0)711 72840-211 Agenda 10:00 Beginn der Veranstaltung Die Oracle Datenbank in ihren Editionen im Überblick OracleXE, SE1, SE, EE: Wer braucht was? Was sind die Unterschiede ...? Die Standard Edition - Eine umfangreiche Grundausstattung SQL und PL/SQL: Mehr als SELECT, Application Express, Oracle TEXT und mehr ... Mittagspause Mehr Performance: Die Sportausstattung in der Enterprise Edition Performante Statementausführung, Garantierte Ressourcenverwendung, Speicherplatz sparen ... Mehr Sicherheit: Die Sicherheitsausstattung in der Enterprise Edition Mandantenfähigkeit out-of-the-box, Audit-Möglichkeiten Mehr Verfügbarkeit: Die Mobilitätsausstattung in der Enterprise Edition Flashback Database, Möglichkeiten mit Data Guard, ... 17:00: Ende der Veranstaltung Wir freuen uns auf Sie!

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• Data Aggregation of CSV files java

  - by royB

  I have k csv files (5 csv files for example), each file has m fields which produce a key and n values. I need to produce a single csv file with aggregated data. I'm looking for the most efficient solution for this problem, speed mainly. I don't think by the way that we will have memory issues. Also I would like to know if hashing is really a good solution because we will have to use 64 bit hashing solution to reduce the chance for a collision to less than 1% (we are having around 30000000 rows per aggregation). For example file 1: f1,f2,f3,v1,v2,v3,v4 a1,b1,c1,50,60,70,80 a3,b2,c4,60,60,80,90 file 2: f1,f2,f3,v1,v2,v3,v4 a1,b1,c1,30,50,90,40 a3,b2,c4,30,70,50,90 result: f1,f2,f3,v1,v2,v3,v4 a1,b1,c1,80,110,160,120 a3,b2,c4,90,130,130,180 algorithm that we thought until now: hashing (using concurentHashTable) merge sorting the files DB: using mysql or hadoop or redis. The solution needs to be able to handle Huge amount of data (each file more than two million rows) a better example: file 1 country,city,peopleNum england,london,1000000 england,coventry,500000 file 2: country,city,peopleNum england,london,500000 england,coventry,500000 england,manchester,500000 merged file: country,city,peopleNum england,london,1500000 england,coventry,1000000 england,manchester,500000 The key is: country,city. This is just an example, my real key is of size 6 and the data columns are of size 8 - total of 14 columns. We would like that the solution will be the fastest in regard of data processing.

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• Generating Deep Arrays: Shallow to Deep, Deep to Shallow or Bad idea?

  - by MobyD

  I'm working on an array structure that will be used as the data source for a report template in a web app. The data comes from relatively complex SQL queries that return one or many rows as one dimensional associative arrays. In the case of many, they are turned into two dimensional indexed array. The data is complex and in some cases there is a lot of it. To save trips to the database (which are extremely expensive in this scenario) I'm attempting to get all of the basic arrays (1 and 2 dimension raw database data) and put them, conditionally, into a single, five level deep array. Organizing the data in PHP seems like a better idea than by using where statements in the SQL. Array Structure Array of years( year => array of types( types => array of information( total => value, table => array of data( index => db array ) ) ) ) My first question is, is this a bad idea. Are arrays like this appropriate for this situation? If this would work, how should I go about populating it? My initial thought was shallow to deep, but the more I work on this, the more I realize that it'd be very difficult to abstract out the conditionals that determine where each item goes in the array. So it seems that starting from the most deeply nested data may be the approach I should take. If this is array abuse, what alternatives exist?

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• Which would be a better way to load data via ajax

  - by Mike

  I am using google maps and returning html/lat/long from my MySQL database Currently A user picks a business category e.g; "Video Production". an ajax call is sent to a CodeIgniter controller the Controller then queries the db, and returns the following data via JSON Lat/Long of the marker HTML for the popup window this is approximately 34 rows in the database across two tables per business the ajax call receives this data and then plots the marker along with the html onto the map The data that is returned from the controller is one big json object... This is done for all businesses that exist in the Video Production category (currently approx 40 businesses). As you can see, pulling this data for multiple categories (100s of businesses) can get very very taxing on the server. My question is Would it be more beneficial to modify the process flow as such: a user picks a business category e.g; "Video Production". an ajax call is sent to a CodeIgniter controller the controller then queries the database for the location base information lat/long level (used to change marker icon color) This would be a single row per business with several columns the ajax call receives this data and then plots the marker on the map when the user clicks a marker an ajax call is sent to a CodeIgniter Controller the controller queries the database for the HTML and additional data based on business_id and if not, what are some better suggestions to this problem? In summary this means rather than including the HTML and additional data along for each business, only submitting minimal location information and then re-query for that information when each business marker is clicked. Potential Downsides longer load times when a user clicks a marker icon more code?? more queries to the database

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• Firefox dependencies problem on 12.10

  - by theshu

  I did a fresh install of Ubuntu 12.10 today and now am getting the following error: You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: firefox-globalmenu : Depends: firefox (= 17.0.1+build1-0ubuntu0.12.10.1) but 16.0.1+build1-0ubuntu1 is installed E: Unmet dependencies. Try using -f. When I run the sudo apt-get -f install...I get the following after I type the "y": (Reading database ... 179765 files and directories currently installed.) Preparing to replace firefox 16.0.1+build1-0ubuntu1 (using .../firefox_17.0.1+build1-0ubuntu0.12.10.1_i386.deb) ... Unpacking replacement firefox ... dpkg-deb (subprocess): decompressing archive member: internal gzip read error: '<fd:4>: incorrect data check' dpkg-deb: error: subprocess <decompress> returned error exit status 2 dpkg: error processing /var/cache/apt/archives/firefox_17.0.1+build1-0ubuntu0.12.10.1_i386.deb (--unpack): cannot copy extracted data for './etc/apparmor.d/usr.bin.firefox' to '/etc/apparmor.d/usr.bin.firefox.dpkg-new': unexpected end of file or stream Please restart all running instances of firefox, or you will experience problems. Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for desktop-file-utils ... Processing triggers for gnome-menus ... Processing triggers for man-db ... Errors were encountered while processing: /var/cache/apt/archives/firefox_17.0.1+build1-0ubuntu0.12.10.1_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) This error is preventing me from installing Synaptic package manager and is also preventing me from installing anything with the Software center or Update manager. I tried uninstalling Firefox and also upgrading Firefox to no avail as well. Open to suggestions.

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• POST attack on my website

  - by benhowdle89

  Hi, I have a site (humanisms.co.uk) which incorporates a voting system, ie. user clicks "Up" and it sends a parameter to a PHP script via AJAX, the PHP inserts vote into MYSQL db and the new "Up" vote is sent back to the page to update the vote count. This is working great but i've noticed that the number of votes for one of my questions shot up last night. I viewed my webhosts access logs and saw this line: 108.27.195.232 - - [03/Mar/2011:15:20:18 +0000] "POST /vote.php HTTP/1.1" 200 2 "http://www.humanisms.co.uk/" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_6; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.114 Safari/534.16" This is repeated well over 100 times and sometimes more than once a second. Now i know they probably arent sitting there clicking Vote but running some sort of PHP loop? I'm not worried about SQL injection but what can i do to prevent this same IP address from doing this or what can i do in general to avoid this scenario. I should also say that there's no login so anyone can click using the voting system. Thanks

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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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