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  • March 24 VTSQL Meeting: BI with SQL Server guru Rushabh Mehta

    When: March 24th, 6PM Where: Competitive Computing, Colchester Vermont (www.competitive.com) From Zero to BI in 10 Minutes or less By Rushabh Mehta Finally a technology that the Information Worker can use to take raw data and turn it into valuable information in a matter of minutes from the comfort of their own desktop! In this very exciting and interactive session full of exciting demos, we will walk you through taking raw information from a variety of sources and building a powerful analytical...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • How to Exclude poperties file from jar file ?

    - by Nisarg Mehta
    Hi All, I have a java application for exaple see below. myProject | |----src | | | |--main | | | |--resources | | | |--userConfig.properties | |--log4j.properties | |---target I am using Maven to build my project .I am using maven command to build jar file. mvn package -DMaven.test.skip=true I want to exclude userConfig.properties file from my jar file so i have mentioned in pom.xml as below. <excludes> <exclude>**/userConfig.properties</exclude> </excludes> but it will exclude from the target folder in which compile code resides. And Application will not run because it will not find the userConfig.properties. Can anyone help me ? Thanks Nisarg Mehta

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  • SQLAuthority News – A Successful Community TechDays at Ahmedabad – December 11, 2010

    - by pinaldave
    We recently had one of the best community events in Ahmedabad. We were fortunate that we had SQL Experts from around the world to have presented at this event. This gathering was very special because besides Jacob Sebastian and myself, we had two other speakers traveling all the way from Florida (Rushabh Mehta) and Bangalore (Vinod Kumar).There were a total of nearly 170 attendees and the event was blast. Here are the details of the event. Pinal Dave Presenting at Community Tech Days On the day of the event, it seemed to be the coldest day in Ahmedabad but I was glad to see hundreds of people waiting for the doors to be opened some hours before. We started the day with hot coffee and cookies. Yes, food first; and it was right after my keynote. I could clearly see that the coffee did some magic right away; the hall was almost full after the coffee break. Jacob Sebastian Presenting at Community Tech Days Jacob Sebastian, an SQL Server MVP and a close friend of mine, had an unusual job of surprising everybody with an innovative topic accompanied with lots of question-and-answer portions. That’s definitely one thing to love Jacob, that is, the novelty of the subject. His presentation was entitled “Best Database Practices for the .Net”; it really created magic on the crowd. Pinal Dave Presenting at Community Tech Days Next to Jacob Sebastian, I presented “Best Database Practices for the SharePoint”. It was really fun to present Database with the perspective of the database itself. The main highlight of my presentation was when I talked about how one can speed up the database performance by 40% for SharePoint in just 40 seconds. It was fun because the most important thing was to convince people to use the recommendation as soon as they walk out of the session. It was really amusing and the response of the participants was remarkable. Pinal Dave Presenting at Community Tech Days My session was followed by the most-awaited session of the day: that of Rushabh Mehta. He is an international BI expert who traveled all the way from Florida to present “Self Service BI” session. This session was funny and truly interesting. In fact, no one knew BI could be this much entertaining and fascinating. Rushabh has an appealing style of presenting the session; he instantly got very much interaction from the audience. Rushabh Mehta Presenting at Community Tech Days We had a networking lunch break in-between, when we talked about many various topics. It is always interesting to get in touch with the Community and feel a part of it. I had a wonderful time during the break. Vinod Kumar Presenting at Community Tech Days After lunch was apparently the most difficult session for the presenter as during this time, many people started to fall sleep and get dizzy. This spot was requested by Microsoft SQL Server Evangelist Vinod Kumar himself. During our discussion he suggested that if he gets this slot he would make sure people are up and more interactive than during the morning session. Just like always, this session was one of the best sessions ever. Vinod is true to his word as he presented the subject of “Time Management for Developer”. This session was the biggest hit in the event because the subject was instilled in the mind of every participant. Vinod Kumar Presenting at Community Tech Days Vinod’s session was followed by his own small session. Due to “insistent public demand”, he presented an interesting subject, “Tricks and Tips of SQL Server“. In 20 minutes he has done another awesome job and all attendees wanted more of the tricks. Just as usual he promised to do that next time for us. Vinod’s session was succeeded by Prabhjot Singh Bakshi’s session. He presented an appealing Silverlight concept. Just the same, he did a great job and people cheered him. Prabhjot Presenting at Community Tech Days We had a special invited speaker, Dhananjay Kumar, traveling all the way from Pune. He always supports our cause to help the Community in empowering participants. He presented the topic about Win7 Mobile and SharePoint integration. This was something many did not even expect to be possible. Kudos to Dhananjay for doing a great job. Dhananjay Kumar Presenting at Community Tech Days All in all, this event was one of the best in the Community Tech Days series in Ahmedabad. We were fortunate that legends from the all over the world were present here to present to the Community. I’d say never underestimate the power of the Community and its influence over the direction of the technology. Vinod Kumar Presenting trophy to Pinal Dave Vinod Kumar Presenting trophy to Pinal Dave This event was a very special gathering to me personally because of your support to the vibrant Community. The following awards were won for last year’s performance: Ahmedabad SQL Server User Group (President: Jacob Sebastian; Leader: Pinal Dave) – Best Tier 2 User Group Best Development Community Individual Contributor – Pinal Dave Speakers I was very glad to receive the award for our entire Community. Attendees at Community Tech Days I want to say thanks to Rushabh Mehta, Vinod Kumar and Dhananjay Kumar for visiting the city and presenting various technology topics in Community Tech Days. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: MVP, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority Author Visit, SQLAuthority News, T SQL, Technology

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  • Implementing Database Settings Using Policy Based Management

    - by Ashish Kumar Mehta
    Introduction Database Administrators have always had a tough time to ensuring that all the SQL Servers administered by them are configured according to the policies and standards of organization. Using SQL Server’s  Policy Based Management feature DBAs can now manage one or more instances of SQL Server 2008 and check for policy compliance issues. In this article we will utilize Policy Based Management (aka Declarative Management Framework or DMF) feature of SQL Server to implement and verify database settings on all production databases. It is best practice to enforce the below settings on each Production database. However, it can be tedious to go through each database and then check whether the below database settings are implemented across databases. In this article I will explain it to you how to utilize the Policy Based Management Feature of SQL Server 2008 to create a policy to verify these settings on all databases and in cases of non-complaince how to bring them back into complaince. Database setting to enforce on each user database : Auto Close and Auto Shrink Properties of database set to False Auto Create Statistics and Auto Update Statistics set to True Compatibility Level of all the user database set as 100 Page Verify set as CHECKSUM Recovery Model of all user database set to Full Restrict Access set as MULTI_USER Configure a Policy to Verify Database Settings 1. Connect to SQL Server 2008 Instance using SQL Server Management Studio 2. In the Object Explorer, Click on Management > Policy Management and you will be able to see Policies, Conditions & Facets as child nodes 3. Right click Policies and then select New Policy…. from the drop down list as shown in the snippet below to open the  Create New Policy Popup window. 4. In the Create New Policy popup window you need to provide the name of the policy as “Implementing and Verify Database Settings for Production Databases” and then click the drop down list under Check Condition. As highlighted in the snippet below click on the New Condition… option to open up the Create New Condition window. 5. In the Create New Condition popup window you need to provide the name of the condition as “Verify and Change Database Settings”. In the Facet drop down list you need to choose the Facet as Database Options as shown in the snippet below. Under Expression you need to select Field value as @AutoClose and then choose Operator value as ‘ = ‘ and finally choose Value as False. Now that you have successfully added the first field you can now go ahead and add rest of the fields as shown in the snippet below. Once you have successfully added all the above shown fields of Database Options Facet, click OK to save the changes and to return to the parent Create New Policy – Implementing and Verify Database Settings for Production Database windows where you will see that the newly created condition “Verify and Change Database Settings” is selected by default. Continues…

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  • database api commands

    - by Rahul Mehta
    As I am developing database api for a project. I am developing commands for getting data from database. e.g. i have one gib table so command for that is getgib name alias limit fields if user pass the name e.g. getgib rahul than it will return all the gib data whose name is like rahul. if alias is given than it will return the all the gib owned by the user whose alias(userid) given . So i want to design the commands. limit : is to limit the record in query, fields : is the extra fields i want to add in the select query . so as now commands are set but now Question 1 : i want the gibs by the gibid , so how to make this or any suggestion to improve my command is welcome. Question 2 : if user don't want to specify the name , and he want only the gibs by providing alias then at this what separator at the place of name i should used.

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  • Are Get-Set methods a violation of Encapsulation?

    - by Dipan Mehta
    In an Object oriented framework, one believes there must be strict encapsulation. Hence, internal variables are not to be exposed to outside applications. But in many codebases, we see tons of get/set methods which essentially open a formal window to modify internal variables that were originally intended to be strictly prohibited. Isn't it a clear violation of encapsulation? How broadly such a practice is seen and what to do about it? EDIT: I have seen some discussions where there are two opinions in extreme: on one hand people believe that because get/set interface is used to modify any parameter, it does qualifies not be violating encapsulation. On the other hand, there are people who believe it is does violate. Here is my point. Take a case of UDP server, with methods - get_URL(), set_URL(). The URL (to listen to) property is quite a parameter that application needs to be supplied and modified. However, in the same case, if the property like get_byte_buffer_length() and set_byte_buffer_length(), clearly points to values which are quite internal. Won't it imply that it does violate the encapsulation? In fact, even get_byte_buffer_length() which otherwise doesn't modify the object, still misses the point of encapsulation, because, certainly there is an App which knows i have an internal buffer! Tomorrow, if the internal buffer is replaced by something like a *packet_list* the method goes dysfunctional. Is there a universal yes/no towards get set method? Is there any strong guideline that tell programmers (specially the junior ones) as to when does it violate encapsulation and when does it not?

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  • Error while compiling ffmpeg during make

    - by Rahul Mehta
    I want to install ffmpeg on ubuntu. and following this article http://pasindudps.blogspot.com/2010/12/compiling-ffmpeg-in-ubuntu-1010.html but when m doing make after config Then go to the ffmpeg folder. cd ffmpeg Start the installation ./configure --enable-gpl --enable-version3 --enable-nonfree --enable-postproc \ --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb \ --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis \ --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab make giving this error /home/reach121/ffmpeg/libavcodec/x86/cabac.h:93: undefined reference to `ff_h264_norm_shift' /home/reach121/ffmpeg/libavcodec/x86/cabac.h:93: undefined reference to `ff_h264_lps_range' /home/reach121/ffmpeg/libavcodec/x86/cabac.h:93: undefined reference to `ff_h264_norm_shift' /home/reach121/ffmpeg/libavcodec/x86/cabac.h:93: undefined reference to `ff_h264_mlps_state' /home/reach121/ffmpeg/libavcodec/x86/cabac.h:93: undefined reference to `ff_h264_norm_shift' collect2: ld returned 1 exit status make: *** [ffmpeg_g] Error 1 Please suggest why this error is coming and what to do to solve this problem

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  • how to improve concepts for interview

    - by Rahul Mehta
    Hi, I had given the interview , and interviewer tell me to improve the concepts , e.g. he ask me type of array ,and i answered two types of array simple array and associative array . e.g. 2 he ask me why you use pdo , and i answered we can use any database e.g. oracle , mysql and it helps in sql injection , then he ask me how it helps in sql injection then i was not having correct answer. e.g. 3 he ask me about persistent connection , i just use the mysql_pconnect i dont where it will be used and how . is there is any standard way to follow to improve concepts. Please suggest . Thanks

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  • why installing lame it is getting failed

    - by Rahul Mehta
    I want to install ffmpeg with mp3lame enabled for this m following this tutorial , http://ubuntuforums.org/showpost.php?p=9868359&postcount=1289 and in step 2 error is libfaac is not found ? and in step 5 installing lame is giving this error , why it is getting failed , please advised what to do ? reach121@youngib:~/lame-3.98.4$ sudo checkinstall --pkgname=lame-ffmpeg --pkgversion="3.98.4" --backup=no --default --deldoc=yes checkinstall 1.6.2, Copyright 2009 Felipe Eduardo Sanchez Diaz Duran This software is released under the GNU GPL. ***************************************** **** Debian package creation selected *** ***************************************** This package will be built according to these values: 0 - Maintainer: [ root@youngib ] 1 - Summary: [ Package created with checkinstall 1.6.2 ] 2 - Name: [ lame-ffmpeg ] 3 - Version: [ 3.98.4 ] 4 - Release: [ 1 ] 5 - License: [ GPL ] 6 - Group: [ checkinstall ] 7 - Architecture: [ amd64 ] 8 - Source location: [ lame-3.98.4 ] 9 - Alternate source location: [ ] 10 - Requires: [ ] 11 - Provides: [ lame-ffmpeg ] 12 - Conflicts: [ ] 13 - Replaces: [ ] Enter a number to change any of them or press ENTER to continue: Installing with make install... ========================= Installation results =========================== Making install in mpglib make[1]: Entering directory `/home/reach121/lame-3.98.4/mpglib' make[2]: Entering directory `/home/reach121/lame-3.98.4/mpglib' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/mpglib' make[1]: Leaving directory `/home/reach121/lame-3.98.4/mpglib' Making install in libmp3lame make[1]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame' Making install in i386 make[2]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/i386' make[3]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/i386' make[3]: Nothing to be done for `install-exec-am'. make[3]: Nothing to be done for `install-data-am'. make[3]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/i386' make[2]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/i386' Making install in vector make[2]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[3]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[3]: Nothing to be done for `install-exec-am'. make[3]: Nothing to be done for `install-data-am'. make[3]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[2]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[2]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame' make[3]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame' test -z "/usr/local/lib" || /bin/mkdir -p "/usr/local/lib" /bin/bash ../libtool --mode=install /usr/bin/install -c 'libmp3lame.la' '/usr/local/lib/libmp3lame.la' /usr/bin/install -c .libs/libmp3lame.lai /usr/local/lib/libmp3lame.la /usr/bin/install -c .libs/libmp3lame.a /usr/local/lib/libmp3lame.a chmod 644 /usr/local/lib/libmp3lame.a ranlib /usr/local/lib/libmp3lame.a PATH="$PATH:/sbin" ldconfig -n /usr/local/lib ---------------------------------------------------------------------- Libraries have been installed in: /usr/local/lib If you ever happen to want to link against installed libraries in a given directory, LIBDIR, you must either use libtool, and specify the full pathname of the library, or use the `-LLIBDIR' flag during linking and do at least one of the following: - add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution - add LIBDIR to the `LD_RUN_PATH' environment variable during linking - use the `-Wl,--rpath -Wl,LIBDIR' linker flag - have your system administrator add LIBDIR to `/etc/ld.so.conf' See any operating system documentation about shared libraries for more information, such as the ld(1) and ld.so(8) manual pages. ---------------------------------------------------------------------- make[3]: Nothing to be done for `install-data-am'. make[3]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame' make[2]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame' make[1]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame' Making install in frontend make[1]: Entering directory `/home/reach121/lame-3.98.4/frontend' make[2]: Entering directory `/home/reach121/lame-3.98.4/frontend' test -z "/usr/local/bin" || /bin/mkdir -p "/usr/local/bin" /bin/bash ../libtool --mode=install /usr/bin/install -c 'lame' '/usr/local/bin/lame' /usr/bin/install -c lame /usr/local/bin/lame make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/frontend' make[1]: Leaving directory `/home/reach121/lame-3.98.4/frontend' Making install in Dll make[1]: Entering directory `/home/reach121/lame-3.98.4/Dll' make[2]: Entering directory `/home/reach121/lame-3.98.4/Dll' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/Dll' make[1]: Leaving directory `/home/reach121/lame-3.98.4/Dll' Making install in debian make[1]: Entering directory `/home/reach121/lame-3.98.4/debian' make[2]: Entering directory `/home/reach121/lame-3.98.4/debian' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/debian' make[1]: Leaving directory `/home/reach121/lame-3.98.4/debian' Making install in doc make[1]: Entering directory `/home/reach121/lame-3.98.4/doc' Making install in html make[2]: Entering directory `/home/reach121/lame-3.98.4/doc/html' make[3]: Entering directory `/home/reach121/lame-3.98.4/doc/html' make[3]: Nothing to be done for `install-exec-am'. test -z "/usr/local/share/doc/lame/html" || /bin/mkdir -p "/usr/local/share/doc/lame/html" /bin/mkdir: cannot create directory `/usr/local/share/doc': No such file or directory make[3]: *** [install-pkghtmlDATA] Error 1 make[3]: Leaving directory `/home/reach121/lame-3.98.4/doc/html' make[2]: *** [install-am] Error 2 make[2]: Leaving directory `/home/reach121/lame-3.98.4/doc/html' make[1]: *** [install-recursive] Error 1 make[1]: Leaving directory `/home/reach121/lame-3.98.4/doc' make: *** [install-recursive] Error 1 **** Installation failed. Aborting package creation. Cleaning up...OK Bye. reach121@youngib:~/lame-3.98.4$

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  • Pattern for Accessing MySQL connection

    - by Dipan Mehta
    We have an application which is C++ trying to access MySQL database. There are several (about 5 or so) threads in the application (with Boost library for threading) and in each thread has a few objects, each of which is trying to access Database for its' own purpose. It has a simple ORM kind of model but that really is not an important factor here. There are three potential access patterns i can think of: There could be single connection object per application or thread and is shared between all (or group). The object needs to be thread safe and there will be contentions but MySQL will not be fired with too many connections. Every object could initiate connection on its own. The database needs to take care of concurrency (which i think MySQL can) and the design could be much simpler. There could be two possibilities here. a. either object keeps a persistent connection for its life OR b. object initiate connection as and when needed. To simplify the contention as in case of 1 and not to create too many sockets as in case of 2, we can have group/set based connections. So there could be there could be more than one connection (say N), each of this connection could be shared connection across M objects. Naturally, each of the pattern has different resource cost and would work under different constraints and objectives. What criteria should i use to choose the pattern of this for my own application? What are some of the advantages and disadvantages of each of these pattern over the other? Are there any other pattern which is better? PS: I have been through these questions: mysql, one connection vs multiple and MySQL with mutiple threads and processes But they don't quite answer exactly what i am trying to ask.

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  • Good Literature for "Object oriented programming in C"

    - by Dipan Mehta
    This is not a debate question about whether or not C is a good candidate for Object oriented programming or not. Quite often C is the primary platform where the development is happening. I have seen, and hopefully learnt through crawling many open source and commercial projects - that while the language inherently doesn't stop you if you create "non-object" code. However, you can still think in the "Object" way and reasonably write code that captures this designs thinking. For those who has done this, OO way is still the best way to write code even when you are programming in C. While, I have learnt most of it through the hard way, are there any deep literature that can help educate the relatively young guys about how to do OO programming in C?

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  • What do you do if you reach a design dead-end in evolutionary methods like Agile or XP?

    - by Dipan Mehta
    As I was reading Martin Fowler's famous blog post Is Design Dead?, one of the striking impressions I got is that given the fact that in Agile Methodology and Extreme Programming, the design as well as programming is evolutionary, there are always points where things need to get refactored. It may be possible that when a programmer's level is good, and they understand design implications and don't make critical mistakes, the code continues to evolve. However, in a normal context, what is the ground reality in this context? In a normal day given some significant development goes into product, and when critical change occurs in requirement isn't it a constraint that how much ever we wish, fundamental design aspects cannot be modified? (without throwing away major part of the code). Is it not quite likely that one reaches dead-end on any further possible improvement on design and requirements? I am not advocating any non-Agile practice here, but I want to know from people who practice agile or iterative or evolutionary development methods, as for their real experiences. Have you ever reached such dead-ends? How have you managed to avoid it or escaped it? Or are there measures to ensure that design remains clean and flexible as it evolves?

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  • Requirment Analysis Communication

    - by Rahul Mehta
    Hi, Someday s ago we was discussing about the current project, and suddenly sir and my senior started talking about the new feature to add in the project , and i become lost :). i was not able to find how i should provide my input for the new feature. So i want to know what things should be discussed for developing new feature in project and how we can contribute in requirement talk of new features. Please suggest.

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  • How to solve my big communication issue and take care in future

    - by Rahul Mehta
    My company had a POC which was done by me,my senior ,my boss and our channel partner team 4 people and our company team done most of coding and first installation of the softwares of the POC was done by channel partner team, and documented the same thing, i had installed on our server, Our comapny team worked very hard. Now we are about to start second stage of POC. But today my boss told me that my senior and channel partner team have issue with me ,regarding my communication. So before considering me on this project they want to resolve this issue or not considered me . I agree i have less communications skills. and I don't ask any question till i need to any one , i prefer to ask on stackoverflow. But i don't know, how this issue is being arise ,i had done all the things they asked , replied to all email and talk on phone. I always obeyed them. I always told them what they asked. what should i do that these type of issue doesn't arrive in future. And now boss told me to prepare a script to talk with my senior to resolve the issue. what should i talk to my senior? I want to work on this project , but i don't want to do so much request to work on this project. How should and what should (Code Documentation , Research Material I done etc . what are docs neccessary for communication with team member )i communication with my team member in future so these kind of issue not arise.

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  • Retrive JSON data from JSON Object in C#

    - by user1638260
    JsonObject friendlist = facebookClient.Get("/me/friends") as JsonObject; //Retrive Data from friendlist { "data": [ { "name": "Mehta", "id": "1000032633029611" }, { "name": "Patu Mehta", "id": "1000042433527270" } ], "paging": { "next": "https://graph.facebook.com/100004241944047/friends?access_token=AAAEXJfmh18QBALKtilFYJz5PU6XvxKIaZAc65NYtyZCLbOqFKyZC8hdyjaU7C7w1CaLKG8tFdRtLYqtAX3vqrPwYNNe5G0aTGhB5x1mwgZDZD&limit=5000&offset=5000&__after_id=100004244527270" } } Count: 2 IsReadOnly: false Keys: Count = 2 Values: Count = 2 But i required only data not whole value like

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  • Best Creational Pattern for loggers in a multi-threaded system?

    - by Dipan Mehta
    This is a follow up question on my past questions : Concurrency pattern of logger in multithreaded application As suggested by others, I am putting this question separately. As the learning from the last question. In a multi-threaded environment, the logger should be made thread safe and probably asynchronous (where in messages are queued while a background thread does writing releasing the requesting object thread). The logger could be signleton or it can be a per-group logger which is a generalization of the above. Now, the question that arise is how does logger should be assigned to the object? There are two options I can think of: 1. Object requesting for the logger: Should each of the object call some global API such as get_logger()? Such an API returns "the" singleton or the group logger. However, I feel this involves assumption about the Application environment to implement the logger -which I think is some kind of coupling. If the same object needs to be used by other application - this new application also need to implement such a method. 2. Assign logger through some known API The other alternative approach is to create a kind of virtual class which is implemented by application based on App's own structure and assign the object sometime in the constructor. This is more generalized method. Unfortunately, when there are so many objects - and rather a tree of objects passing on the logger objects to each level is quite messy. My question is there a better way to do this? If you need to pick any one of the above, which approach is would you pick and why? Other questions remain open about how to configure them: How do objects' names or ID are assigned so that will be used for printing on the log messages (as the module names) How do these objects find the appropriate properties (such as log levels, and other such parameters) In the first approach, the central API needs to deal with all this varieties. In the second approach - there needs to be additional work. Hence, I want to understand from the real experience of people, as to how to write logger effectively in such an environment.

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  • How to recover data from NTFS partition that was made into a Swap partition?

    - by Raghav Mehta
    I have extremely important stuff on my windows partition which during the ubuntu 10.10 installation,when it said that I should create something called swap space, I selected it to be a swap space (without even knowing what it actually meant) The Grub2 doesn't show up so I don't get a choice to boot Ubuntu or Windows. I don't get my windows partition as a removable device in Ubuntu either. When I go to disk utility and select the sda2 (i.e.. my windows partition) and click edit partition and select HPFS/NTFS for the type and tick bootable and click OK the small processing sign keep on rotating on the bottom right of the sda2 in the chart and after about 10 to 15 minutes it gives an unknown error and thus, I am still unable to use my windows. I am even worse than a beginner who doesn't know a thing about Ubuntu so please be patient and help me out.

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  • good literature for teaching object oriented thinking in C [closed]

    - by Dipan Mehta
    Quite often C is the primary platform for the development. And when things are large scale, I have seen partitioning of the system as different objects is quite a natural thing. Some or many of the object orientated analysis and design principles are used here very well. This is not a debate question about whether or not C is a good candidate for object oriented programming or not. This is also NOT a question how to do OO in C. You can refer to this question and there are probably many such citations. As far as I am concerned, I have learned some of this things while working with many open source and commercial projects. (libjpeg, ffmpeg, Gstreamer which is based on GObject). I can probably extend a few references that explains some of these concepts such as - 1. Event Helix article, 2. Linux Mag article 3. one of my answers which links Schreiner's reference. Unfortunately, when we induct younger folks, it seems too hard to make them learn all of it the hard way. Usually, when we say it's C, a general reaction is to throw away all of the "Object thinking". Looking for help extending above references from those who have been in the similar areas of work. Are there any good formal literature that explains how Object thinking can be made to use while you are working in C? I have seen tons of book on general "object oriented paradigms" but they all focus on advanced languages mostly not in C. You see most C books - but most focus only on the syntax and the obfuscated corners of C and that's it. There are hardly ANY good reference, specially books or any systematic (I mean formal) literature on how to apply OO in C. This is very surprising given that so many large scale open source projects use C which are truly using this very well; but we hardly see any good formal literature on this subject.

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  • How to do thread management in C++?

    - by Dipan Mehta
    We use pthread for thread management in C based systems. pthread is in general compilable by C++ compiler (like g++). However, what are the better ways of abstractions for threads in C++? Also, for making any system to be working in a multi-threaded system, it is also important to make thread safe. What are the standard libraries that requires alternative (installs) to be thread safe or are they unsafe for multi-threaded environments? Is smart pointers, templates require special measures to make it safe? What are the best practices for the thread managements in C++?

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  • Concurrency pattern of logger in multithreaded application

    - by Dipan Mehta
    The context: We are working on a multi-threaded (Linux-C) application that follows a pipeline model. Each module has a private thread and encapsulated objects which do processing of data; and each stage has a standard form of exchanging data with next unit. The application is free from memory leak and is threadsafe using locks at the point where they exchange data. Total number of threads is about 15- and each thread can have from 1 to 4 objects. Making about 25 - 30 odd objects which all have some critical logging to do. Most discussion I have seen about different levels as in Log4J and it's other translations. The real big questions is about how the overall logging should really happen? One approach is all local logging does fprintf to stderr. The stderr is redirected to some file. This approach is very bad when logs become too big. If all object instantiate their individual loggers - (about 30-40 of them) there will be too many files. And unlike above, one won't have the idea of true order of events. Timestamping is one possibility - but it is still a mess to collate. If there is a single global logger (singleton) pattern - it indirectly blocks so many threads while one is busy putting up logs. This is unacceptable when processing of the threads are heavy. So what should be the ideal way to structure the logging objects? What are some of the best practices in actual large scale applications? I would also love to learn from some of the real designs of large scale applications to get inspirations from!

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  • Cannot install vlc in ubuntu 13.10

    - by nisargshah95
    for some reasons I cannot instal VLC media player on my Ubuntu Gnome 13.10 32bit. I added the VideoLAN PPA repository and ran sudo apt-get update and sudo apt-get install vlc Here's the log - nisarg@nisarg-ThinkPad-T61:~$ sudo apt-get install vlc Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: liba52-0.7.4 libaacs0 libass4 libavcodec53 libavformat53 libavutil51 libbluray1 libcddb2 libcrystalhd3 libdc1394-22 libdca0 libdirac-encoder0 libdirectfb-1.2-9 libdvbpsi8 libdvdnav4 libdvdread4 libebml3 libfaad2 libgsm1 libiso9660-8 libkate1 libmad0 libmatroska5 libmodplug1 libmpcdec6 libmpeg2-4 libopus0 libpostproc52 libresid-builder0c2a libschroedinger-1.0-0 libsdl-image1.2 libsdl1.2debian libsidplay2 libssh2-1 libswscale2 libtar0 libts-0.0-0 libtwolame0 libupnp6 libva-x11-1 libva1 libvcdinfo0 libvlc5 libvlccore5 libwebp4 libx264-123 libxcb-composite0 libxcb-keysyms1 libxcb-randr0 libxcb-xv0 libzvbi-common libzvbi0 tsconf vlc-data vlc-nox vlc-plugin-notify vlc-plugin-pulse Suggested packages: libbluray-bdj firmware-crystalhd libdvdcss2 debhelper opus-tools videolan-doc The following NEW packages will be installed: liba52-0.7.4 libaacs0 libass4 libavcodec53 libavformat53 libavutil51 libbluray1 libcddb2 libcrystalhd3 libdc1394-22 libdca0 libdirac-encoder0 libdirectfb-1.2-9 libdvbpsi8 libdvdnav4 libdvdread4 libebml3 libfaad2 libgsm1 libiso9660-8 libkate1 libmad0 libmatroska5 libmodplug1 libmpcdec6 libmpeg2-4 libopus0 libpostproc52 libresid-builder0c2a libschroedinger-1.0-0 libsdl-image1.2 libsdl1.2debian libsidplay2 libssh2-1 libswscale2 libtar0 libts-0.0-0 libtwolame0 libupnp6 libva-x11-1 libva1 libvcdinfo0 libvlc5 libvlccore5 libwebp4 libx264-123 libxcb-composite0 libxcb-keysyms1 libxcb-randr0 libxcb-xv0 libzvbi-common libzvbi0 tsconf vlc vlc-data vlc-nox vlc-plugin-notify vlc-plugin-pulse 0 upgraded, 58 newly installed, 0 to remove and 7 not upgraded. Need to get 16.7 MB of archives. After this operation, 75.0 MB of additional disk space will be used. Do you want to continue [Y/n]? y Get:1 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main vlc-data all 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [4,967 kB] Get:2 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main libvlccore5 i386 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [384 kB] Get:3 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main libvlc5 i386 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [42.4 kB] Get:4 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main vlc-nox i386 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [2,084 kB] Get:5 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main vlc i386 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [1,078 kB] Get:6 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main vlc-plugin-notify i386 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [5,836 B] Get:7 http://ppa.launchpad.net/videolan/stable-daily/ubuntu/ saucy/main vlc-plugin-pulse i386 2.0.8+git20131025+r620-0~r13~ubuntu13.10.1 [18.2 kB] Err http://archive.ubuntu.com/ubuntu/ saucy/universe libaacs0 i386 0.6.0-2 Connection failed [IP: 91.189.92.176 80] 51% [Waiting for headers] Now it doesn't move forward after this point. Any suggestions?

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  • java.lang.OutOfMemory error when fetching records from Database

    - by Nisarg Mehta
    Hi All, When I try to fetch around 20,000 records and return to ArrayList then it throws java heap space error. JdbcTemplate select = new JdbcTemplate(dataSource); String SQL_SELECT_XML_IRP_ADDRESS = " SELECT * FROM "+ SCHEMA +".XML_ADDRESS "+ " WHERE FILE_NAME = ? "; Object[] parameters=new Object[] {xmlFileName}; return (ArrayList<XmlAddressDto> ) select.query(SQL_SELECT_XML_ADDRESS, parameters,new XmAddressMapExt()); Is there any solution for this ? How should i process this effectively ?

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  • Could not find function: resolve-uri

    - by Nisarg Mehta
    When i am trying to transform xml it gives me erro that Could not find function: resolve-uri where resolve-uri is a xpath function . below is my xslt line which will use resolve uri function . <xsl:variable name="filename" select="resolve-uri(concat($dir,'/',$xmlFileName,'_',position(),'.xml'))" /> Can anybody please help me.Is it because of xslt version difference ? Thanks in Advance.

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  • Grouping on Multiple Field

    - by Nisarg Mehta
    Hi , I am generating XML file from Database as below... <?xml version = '1.0'?> <T0019> <IFTA_ACCOUNT> <IFTA_CARRIER_ID_NUMBER>705</IFTA_CARRIER_ID_NUMBER> <IFTA_LICENSE_NUMBER>631227666</IFTA_LICENSE_NUMBER> <IFTA_BASE_COUNTRY>US</IFTA_BASE_COUNTRY> <IFTA_BASE_STATE>AL</IFTA_BASE_STATE> <IFTA_STATUS_CODE>0 </IFTA_STATUS_CODE> <IFTA_STATUS_DATE>2009-01-01</IFTA_STATUS_DATE> <IFTA_ISSUE_DATE>2009-01-01</IFTA_ISSUE_DATE> <IFTA_EXPIRE_DATE>2009-12-01</IFTA_EXPIRE_DATE> <IFTA_UPDATE_DATE>2008-12-30</IFTA_UPDATE_DATE> <NAME_TYPE>LG</NAME_TYPE> <NAME>K D L TRUCKING INC</NAME> <ADDRESS_TYPE>PH</ADDRESS_TYPE> <STREET_LINE_1>200 MARTIN LANE</STREET_LINE_1> <CITY>OHATCHEE</CITY> <STATE>AL</STATE> <ZIP_CODE>36271</ZIP_CODE> <COUNTY>CALHOUN COUNTY</COUNTY> <COUNTRY>US</COUNTRY> </IFTA_ACCOUNT> <IFTA_ACCOUNT> <IFTA_CARRIER_ID_NUMBER>705</IFTA_CARRIER_ID_NUMBER> <IFTA_LICENSE_NUMBER>631227666</IFTA_LICENSE_NUMBER> <IFTA_BASE_COUNTRY>US</IFTA_BASE_COUNTRY> <IFTA_BASE_STATE>AL</IFTA_BASE_STATE> <IFTA_STATUS_CODE>0 </IFTA_STATUS_CODE> <IFTA_STATUS_DATE>2009-01-01</IFTA_STATUS_DATE> <IFTA_ISSUE_DATE>2009-01-01</IFTA_ISSUE_DATE> <IFTA_EXPIRE_DATE>2009-12-01</IFTA_EXPIRE_DATE> <IFTA_UPDATE_DATE>2008-12-30</IFTA_UPDATE_DATE> <NAME_TYPE>LG</NAME_TYPE> <NAME>K D L TRUCKING INC</NAME> <ADDRESS_TYPE>MA</ADDRESS_TYPE> <STREET_LINE_1>200 MARTIN LANE</STREET_LINE_1> <CITY>OHATCHEE</CITY> <STATE>AL</STATE> <ZIP_CODE>36271</ZIP_CODE> <COUNTRY>US</COUNTRY> </IFTA_ACCOUNT> </T0019> I have taken first two records from generated XSLT. With the use of XSLT I have tried lot to group record on basis of IFTA_LICENSE_NUMBER,IFTA_BASE_COUNTRY,IFTA_BASE_ST ATE,NAME_TYPE,ADDRESS_TYPE but i failed to generated XML like this.. <?xml version="1.0" encoding="UTF-8" ?> <T0019> <IFTA_ACCOUNT> <IFTA_CARRIER_ID_NUMBER>705</IFTA_CARRIER_ID_NUMBER> <IFTA_BASE_COUNTRY>US</IFTA_BASE_COUNTRY> <IFTA_BASE_STATE>AL</IFTA_BASE_STATE> <IFTA_LICENSE_NUMBER>631227666</IFTA_LICENSE_NUMBER> <IFTA_STATUS_CODE>0</IFTA_STATUS_CODE> <IFTA_STATUS_DATE>2009-01-01</IFTA_STATUS_DATE> <IFTA_ISSUE_DATE>2009-01-01</IFTA_ISSUE_DATE> <IFTA_EXPIRE_DATE>2009-12-01</IFTA_EXPIRE_DATE> <IFTA_UPDATE_DATE>2008-12-30</IFTA_UPDATE_DATE> <IFTA_NAME> <NAME_TYPE>LG</NAME_TYPE> <NAME>K D L TRUCKING INC</NAME> <IFTA_ADDRESS> <ADDRESS_TYPE>PH</ADDRESS_TYPE> <STREET_LINE_1>200 MARTIN LANE</STREET_LINE_1> <STREET_LINE_2 /> <CITY>OHATCHEE</CITY> <STATE>AL</STATE> <ZIP_CODE>36271</ZIP_CODE> <COUNTY>CALHOUN COUNTY</COUNTY> <COUNTRY>US</COUNTRY> </IFTA_ADDRESS> <IFTA_ADDRESS> <ADDRESS_TYPE>MA</ADDRESS_TYPE> <STREET_LINE_1>200 MARTIN LANE</STREET_LINE_1> <STREET_LINE_2 /> <CITY>OHATCHEE</CITY> <STATE>AL</STATE> <ZIP_CODE>36271</ZIP_CODE> <COUNTY /> <COUNTRY>US</COUNTRY> </IFTA_ADDRESS> </IFTA_NAME> </IFTA_ACCOUNT> </T0019>

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