aleksandar vacic - Developer IT

SQL - query inside NOT IN takes longer than the complete query ??

- by Aleksandar Tomic

Hi every1, I'm using NOT IN inside my SQL query. For example: select columnA from table1 where columnA not in ( select columnB from table2) How is it possible that this part of the query select columnB from table2 takes 30sec to complete, but the whole query above takes 0.1sec to complete?? Shouldn't the complete query take 30sec + ? BTW, both queries return valid results. Thanks! Answers to Comments Is it because the second query hasn't actually completed but has only returned back the first 'x' rows (out of a very large table?) No, the query is completed after 30 seconds, not to many rows returned (eg. 50). But @Aleksandar wondered why the question congaing the performance killer was so fast. my point exactly Also how long does select distinct columnB from table2 take to execute? actually, the original query is "select distinct...

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How to add a "Show desktop" icon to the launcher?

- by Aleksandar Maricak

I recently upgraded from 10.04 to 12.04, and there is no show desktop in the launcher. I know I can use Ctrl+Super+D, but is there a way to get it in the launcher? Edit: I just installed the "show desktop" icon on the launcher with MyUnity (see below) and it worked fine. It did not install the icon above Dash launcher, but well below it. That bug has apparently been fixed. This is as of 2012.9.30.

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Display in applications on ubuntu 12.10 is broken - maybe theme problem

- by Aleksandar

I have a problem which looks like this: http://s16.postimage.org/yjusy9en9/Screenshot_from_2012_10_28_22_49_07.png If you take a look at buttons "Apply", "Reset", "Close" or any other buttons or drop-downs, you will see there is no style on them. It is a fresh install of ubuntu 12.10 and it was working on the beginning. But after some time setting up ubuntu I noticed the style on the elements has gone - I don't know when. I installed compiz-settings - maybe that caused - but when I un-install nothing changes. Also checking/unchecking "window decoration" in compiz doesn't help. Please help me. I am out of options :/

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RegEx strip html tags problem

- by Aleksandar Mirilovic

Hi, I've tried to strip html tags using regex replace with pattern "<[^]*" from word generated html that looks like this: <html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=iso-8859-2"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place" downloadurl="http://www.5iantlavalamp.com/"/>  <style>  </style> </head> Everything works fine except for the bolded lines above, anybody got ideas how to match the them to? Thanks, Aleksandar

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How to hide/show controls in UITableViewCell when it goes in/out of editing mode?

- by Aleksandar Vacic

I have few custom controls (image views) added programmatically to table cell. I want to hide them when table view goes into editing mode and show them again when view gets out of editing mode. I'm not using UITableViewCell subclasses, controls are added through tableView:cellForRowAtIndexPath: method. When and where should I do the hide/show? I'm wondering is this even possible without subclassing (where I could do this in layoutSubviews)...

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skipping a variable using while read in bash

- by Aleksandar Ivanisevic

i'm reading a few variables from a file using while read a b c; do (something) done < filename is there an elegant way to skip a variable (read in an empty value), i.e. if I want a=1 b= c=3, what should I write in the file? Right now i'm putting 1 "" 3 and then use b=$(echo $b | tr -d \" ) but this is pretty cumbersome, IMHO any ideas?

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PCI DSS requirement 6.4.2 separation of duties between development/test environments

- by Aleksandar Ivanisevic

6.4.2 Is there separation of duties between personnel assigned to the development/test environments and those assigned to the production environment? What does the separation of duties here mean? Is it in the sense of http://www.sans.edu/research/security-laboratory/article/it-separation-duties or something else? The formulation "between test and production environment" is really confusing me, it looks like they mean that one should have different sysadmins for test and production? Or do they just mean that developers shouldn't have access to production? thanks.

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speeding up cvs pserver over WAN

- by Aleksandar Ivanisevic

I have a remote location with 5 developers that are using a CVS (pserver) repository in main office via WAN, but the bandwidth i have is only a couple of hundred kbps so CVS operations are fairly slow. Is there any way to speed this up? I can rsync over a local copy of the CVS root(s) every couple of minutes, so this can handle the updates, but obviously not the commits. Is there any way to say to CVS to update from one server, but push to another one? Any other ideas?

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Access control for cross site requests in Internet Explorer

- by Aleksandar

I am trying to make an AJAX call from several domains to a single one which will handle the request. Enabling Cross domain in Firefox and Chrome was easy by setting the header on the handling server: header("Access-Control-Allow-Origin: *"); But this doesn't help enabling it in Internet Explorer. When I try: httpreq.send(''); it stops with error Access denied. How can this be enabled in Internet Explorer?

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Architectural advice on connecting multiple diverse sites into a single community.

- by Aleksandar

Hi SO, I've been given a task to connect multiple sites of the same client into a single network. So i would like to hear an architectural advice on connecting these sites into a single community. These sites include: 1. Invision Power Board Forum (the most important site) 2. 3 custom made cms-s (changes to code allowable) 3. 1 drupal site 4. 3-4 wordpress blogs Requirements are as follows: 1. Connecting all users of all sites into a single administrable entity. With permissions changing ability, users banning etc. 2. Later on, based on this implementation I have to implement "facebook like" chat, which will be available to all users regardless of place of login. I have few ideas on my mind on how to go with this, but would like to hear some people with more experience and expertize than my self. Cheers!

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importing an existing x509 certificate and private key in Java keystore to use in ActiveMQ ssl context

- by Aleksandar Ivanisevic

I have this in activemq config <sslContext> <sslContext keyStore="file:/home/alex/work/amq/broker.ks" keyStorePassword="password" trustStore="file:${activemq.base}/conf/broker.ts" trustStorePassword="password"/> </sslContext> I have a pair of x509 cert and a key file How do I import those two to be used in ssl and ssl+stomp connectors? All examples i could google always generate the key themselves, but I already have a key. I have tried keytool -import -keystore ./broker.ks -file mycert.crt but this only imports the certificate and not the key file and results in 2009-05-25 13:16:24,270 [localhost:61612] ERROR TransportConnector - Could not accept connection : No available certificate or key corresponds to the SSL cipher suites which are enabled. I have tried concatenating the cert and the key but got the same result How do I import the key?

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IValueConverter from string

- by Aleksandar Toplek

I have an Enum that needs to be shown in ComboBox. I have managed to get enum values to combobox using ItemsSource and I'm trying to localize them. I thought that that could be done using value converter but as my enum values are already strings compiler throws error that IValueConverter can't take string as input. I'm not aware of any other way to convert them to other string value. Is there some other way to do that (not the localization but conversion)? I'm using this marku extension to get enum values [MarkupExtensionReturnType(typeof (IEnumerable))] public class EnumValuesExtension : MarkupExtension { public EnumValuesExtension() {} public EnumValuesExtension(Type enumType) { this.EnumType = enumType; } [ConstructorArgument("enumType")] public Type EnumType { get; set; } public override object ProvideValue(IServiceProvider serviceProvider) { if (this.EnumType == null) throw new ArgumentException("The enum type is not set"); return Enum.GetValues(this.EnumType); } } and in Window.xaml <Converters:UserTypesToStringConverter x:Key="userTypeToStringConverter" /> .... <ComboBox ItemsSource="{Helpers:EnumValuesExtension Data:UserTypes}" Margin="2" Grid.Row="0" Grid.Column="1" SelectedIndex="0" TabIndex="1" IsTabStop="False"> <ComboBox.ItemTemplate> <DataTemplate DataType="{x:Type Data:UserTypes}"> <Label Content="{Binding Converter=userTypeToStringConverter}" /> </DataTemplate> </ComboBox.ItemTemplate> </ComboBox> And here is converter class, it's just a test class, no localization yet. public class UserTypesToStringConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return (int) ((Data.UserTypes) value) == 0 ? "Fizicka osoba" : "Pravna osoba"; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { return default(Data.UserTypes); } }

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CSS3 Hover transition strange behavior

- by Aleksandar Ivanov

So I was playing around with transition/hover effects so that's the code. <pre> <code> /* HTML */ section> a href="#" title="button">CLICK!</a> // deleted the lt sign for visibility reasons! a href="#" title="button">CLICK!</a> a href="#" title="button">CLICK!</a> a href="#" title="button">CLICK!</a> /section> /********/ /* CSS */ section{ width: 700px; height: 500px; margin: 250px auto; position: relative; background: #08c; } section a{ border-radius: 51px; background: #e60; line-height: 100px; text-align: center; color: #04e; font-size: 24px; font-weight: bold; font-family: tahoma; text-decoration: none; display: block; width: 100px; height: 100px; } section a:nth-child(1){ position: absolute; top: -100px; left: -100px; -webkit-transition: left 2s ease; } section a:nth-child(2){ position: absolute; top: -100px; right: -100px; -webkit-transition: top 2s ease; } section a:nth-child(3){ position: absolute; bottom: -100px; right: -100px; -webkit-transition: right 2s ease; } section a:nth-child(4){ position: absolute; bottom: -100px; left: -100px; -webkit-transition: bottom 2s ease; } section a:nth-child(1):hover,section a:nth-child(1):focus{ left: 800px; } section a:nth-child(2):hover{ top: 600px; } section a:nth-child(3):hover{ right: 800px; } section a:nth-child(4):hover{ bottom: 600px; } /*******/ </code> </pre> BUT, I stumbled upon a strange thing. When I hover over a link its starts getting to its right position applied by the hover, but at some point (always different) the effect stops and it gets back to its original position! Have anyone seen this and know what is the problem ?

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Podcast Show Notes – Oracle Coherence and Data Grid Technology - Part 1

- by Bob Rhubart

This week’s ArchBeat Podcast program kicks off a three-part series featuring a discussion of Oracle Coherence and data grid technology. Listen to Part 1 The panelists for this discussion are: Cameron Purdy, VP of Development, Oracle Blog | Twitter | LinkedIn | Oracle Mix Aleksandar Seovic, founder and managing director at S4HC Inc. Blog| Twitter | LinkedIn | Oracle Mix | Oracle ACE Profile (Aleks is also the author of Oracle Coherence 3.5 from Packt Publishing.) John Stouffer, independent consultant, Oracle Applications DBA/Architect Blog | LinkedIn | Oracle Mix | Oracle ACE Profile Part two will be available on June 23, part 3 on June 30. Coming soon On July 7 the ArchBeat Podcast kicks of a series featuring an open discussion of Architecture and Agility. Stay tuned: RSS Technorati Tags: oracle,otn,arch2arch,archbeat,coherence,data grid,cameron purdy,aleks seovic del.icio.us Tags: oracle,otn,arch2arch,archbeat,coherence,data grid,cameron purdy,aleks seovic

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??????????????????????????/????????????????????????·???????????|WebLogic Channel|??????

- by ???02

??????????????????·???????Oracle Coherence??????Java???????????????????????????????????????????????????????????????????Java API??????Oracle Coherence???????????3????????????????????????Coherence???????????????????????????????3???????????(???)???????Coherence???????????????Java??????????　???????????????????????·??????????/????·????Oracle Coherence???????????????????????Java API??????Oracle Coherence????????????????????????????????????????????????????????????????　?????????????Coherence??????????????????????????????/???????????????????????????????????????????3???????(4)????????/????????????　????????????????????????????????????·???/?????????　Oracle Coherence????????????????1?????????????????????????????????????????????????????????????????????????????????????????????????????????????Oracle Coherence?????????????????????????·????????????????????????????????????????In-Place Processing????????Oracle Coherence???In-Place Processing?????????????????????????????????????????　????·???/???????????In-Place Processing??????????????????·??????????????????????????????????????????????????????????????????????????????????????????　???????????????????????????????????????????????????　???In-Place Processing????????·????????????Oracle Coherence 3.6????????????Coherence Query Language(CohQL)??????????????????????????????CohQL???????????????????SQL?????????????????SQL?WHERE?????????????????????????????(5)???????????????　???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????(?????)?????????????????????????????????????????????????????????????????????????????　Oracle Coherence?????????????????????????????????????Oracle Coherence???????????????????????????????????????????????????????????????????????????????????????????????/????????????????????????????????????????????　??????·????????????????????????????????????????????????????Oracle Coherence?????????????????????????????????????????????(??????)?????????????????????????????????????????????????????????　???????·????????????Continuous Query Cache??????????????????????????????????????????????????????????????????????????????????????????????????????????????Continuous Query Cache????????????????????????(6)???????????????????　????Oracle Coherence????????????Invocation Service??????????????????(4)?????In-Place Processing?????????????·?????????????????????????????????????????????????????Java??????????????????????????????·????????????????????????????????????????????????　??????????????????????Oracle Coherence ??????????????????????????????????????????CPU???????????????????????Oracle Coherence???????????????????????????????????Web???????????????????????????Oracle Coherence?????????????????????????????????????????*　　　*　　　*　?????????Java????????????????????Oracle Coherence?6???????????????????????????Oracle Coherence????????????????????????????????????????????????????????Oracle Coherence?????:Aleksandar Seovic?Mark Falco?Patrick Peralta??:????·??????????????·????Oracle Coherence: Share and Manage Data In Clusters?···3????????????·??????????????????????????

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z-index has no effect in IE7 with Google Map and Navigation Sub-Menus

- by bhamrick

I feel like the problem is extremely apparent. I'm working on an issue with a client's site, which actually happens on several of my clients' sites but this one is the most apparent. IE7 Is refusing to obey z-index rules. I've played around with differing values, particularly on the divs #mapWrapper and #map. Take a look here: http://thepaysongroup.com/wp-content/plugins/hq_idx/searchlistings.php I've done dozens of web searches and I can't find anything that resolves this issue. I also ready through Aleksandar Vacic's article on IE6/7 z-index discrepancies, but still nothing. Any assistance would be much appreciated, I'm tearing my hair out on this one.

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links for 2010-05-19

- by Bob Rhubart

Presentations from #otnarchday in Dallas now available on Slideshare Includes presentations on IT Optimization, Application Integration Architecture, Application Grid, and Infrastructure Consolidation. More to come. Anthony Shorten: JMX Based Monitoring - Part Four - Business App Server Monitoring Anthony Shorten discuss a new Oracle Utilities Application Framework V4 feature that allows JMX to be used for management and monitoring the Oracle Utilities business application server component. (tags: oracle otn java architect) New book: Oracle Coherence 3.5 An overview of the new book by authors Aleksandar Seovic, Mark Falco, Patrick Peralta. (tags: oracle otn grid architect) Douwe Pieter van den Bos: Next step in Virtualization: VirtualBox 3.2 "For businesses, VirtualBox just might be the answer they where looking for," says Douwe Pieter van den Bos. "A simple and widely supported virtual machine." (tags: oracle otn virtualization architect) Maurice Gamanho: Python and Ruby in Tuxedo Maurice Gamanho's quick overview of new features in Oracle's Service Architecture Leveraging Tuxedo (SALT) 11gR1. (tags: oracle otn soa architect) Live Webcast: Oracle and AmberPoint - May 20, 2010 - 10 a.m. PT/1 p.m. ET Ed Horst and Ashish Mohindroo discuss the advantages of the Oracle and AmberPoint combination. (tags: oracle otn architect soa governance)

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New York Coherence Special Interest Group, Jan 13 2011

- by ruma.sanyal

Please join us for our next exciting event. We are pleased to announce that Aleksander Seovic, Craig Blitz and Madhav Sathe will be presenting to our group. Presentation details are provided below. Time: 3:00pm - 6:00pm ET Where: Oracle Office, Room 30076, 520 Madison Avenue, 30th Floor, NY We will be providing snacks and beverages. Register! - Registration is required for building security. Presentations:? Getting the Most out of your Coherence Cluster with Oracle Enterprise Manager - Madhav Sathe, Principal Product Manager (Oracle) How To Build a Coherence Practice - Craig Blitz, Senior Principal Product Manager (Oracle) Congratulations on your decision to buy Oracle Coherence. We believe you have chosen an excellent product. Now the hard work begins. To help you get the most out of Coherence from both a project and enterprise perspective, this talk will introduce you to resources available from Oracle and through the Coherence ecosystem. The talk will also discuss best organizational practices you can implement to ensure success with Coherence. The speaker will use his significant experience with customers' Coherence deployment to show what works and what doesn't in practice. Coherence in the Cloud - Aleksandar Seovic, Founder and Managing Director (S4HC) Amazon Web Services cloud provides great and affordable foundation for the next generation of scalable web applications. Application servers, load balancers, and scalable storage can be provisioned in a matter of minutes and used for pennies an hour. However, AWS cloud also brings a set of new architectural challenges, such as transient file systems and dynamically assigned IP addresses. In this session we will look at a real-world example of how Coherence can be used to address some of these challenges and show why the combination of AWS cloud and Coherence has a great synergy.

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