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Search found 37 results on 2 pages for 'zengr'.

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  • A question every programmer has. Maybe.

    - by zengr
    I have been using Java from the last 2yrs (academics). Now, when I am graduating, I received a job offer from a .com. The job is awesome and it's a backend Java work. I wanted to get involved with Ruby on Rails, looked for alot of jobs, gave few interviews, but didn't make it. So, what should I do now? Should I go ahead with Java and learn/do more with Java, a complete 360degree of the java world - Full stack of Java from backend to frontend? OR Java at workplace and try to improve my Ruby on Rails. I understand, this is a very subjective question and depends on the individual, but what would you have done? Have you ever faced a similar problem? I feel I have wasted some time with Rails, where I could not "conquer" Rails, where as I could have used that time to go more into Java.

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  • A good course on HTML/CSS/JS/UX worth it in part time?

    - by zengr
    I am a java/ruby developer from the last 3yrs, trying my hands on JS now. I am fascinated by the awesome UI designs these days. Any app I make, the worst aspect is the UI and I suck at it. I end up copying a design and with a crappy one. I am a student in San Jose, CA, and will be working from next month on Java most probably. My questions are: Are there any good courses (in the the colleges in silicon valley) on web Design (Photoshop), html, css, JS? Is it worth it?

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  • Essential topics to be discussed in Linux 101

    - by zengr
    Hi, We are organizing a Linux 101 Workshop for undergrad and grad students. Can you share some ideas/topics that are must for people who are just starting with Linux. Preconditions: No knowledge of Linux OS, philosophy and technical aspects (kernel, shell, commands) Post conditions: A basic crash course of Linux which will give them a good start and answer some basic questions asked on it.

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  • Do CDNs actually dump the data to the client or pass the URL of the content?

    - by zengr
    I am curious, say for example: Facebook is the client of Akamai CDN. So, now when I login to my FaceBook page, I see all the content (vid, image, text etc) and I click on a video to view it. Now, Facebook is the client to Akami to get the content. So, when a request is made from Facebook to Akami, does Akamai dump the vid/image from their data centers to Facebook's data centers where they reside for a while (depending on their heuristics) and flushed after some time? Or, I see that video (stream it) directly from Akamai's server? UPDATE Data resides in CDN permanently (agreed), but is a copy of the content sent to Facebook's data centers too

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  • How does allmyapps.com work on Ubuntu and Windows?

    - by zengr
    The question describes everything, how does allmyapps work? With a single click (like iPhone app store), you click on install and my system asks me "DO you want to install?" In contrast to regular installation, we 1st download the .exe or .deb and install it. So, how is it possible via web? I think, I am missing out on something very basic, but can some one please explain.

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  • Not able to login to new AMI on EC2 - moveing from micro to small instance

    - by zengr
    I had a t1.micro instance (old_server) on Linux on EC2 and now I need to upgrade my server to m1.small Linux (new_server). So, here is what I did: Shutdown old_server and create an AMI. Launch the new AMI with m1.small configuration. (I kept the key and security group same as old_server) I tried to login by: ssh -i my_key.pem [email protected] But, it gives a connection timeout error. My login to old_server works fine. So, my question is: What is the correct way to scale up (vertically) an EC2 instance? Where am I going wrong in the above mentioned step? When I create an AMI in step 1, is the EBS (data) also copied.

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  • How to migrate Fedora DS (389 DS) to a new machine?

    - by zengr
    Hello, I am trying to migrate a Fedora DS (1.2.2) to a new server (1.2.7.5). The process has been painful to say the least. The old server (1.2.2) was also an upgrade from an old fedora DS setup, so it does not contain migrate-ds-admin.pl. I found this question, but the URL does not open. I am aware that I need to use migrate-ds-admin.pl, but I am clueless. How do I use it? I assume this works like this: 1. Copy migrate-ds-admin.pl from server which has 1.2.7 to 1.2.2 2. Run migrate-ds-admin.pl to export the schema+ldif from 1.2.2 3. Import the schema+ldif to 1.2.7 using migrate-ds-admin.pl. If the above is true, then what parameters are need for export and import? Note: ./ldif2db -n NetscapeRoot -i /root/NetscapeRoot.ldif ./ldif2db -n userRoot -i /root/userRoot.ldif The above two commands work like a charm, but since the schema (custom schema) is not migrated, I see alot of errors during import.

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  • Recursive rm with condition in Linux

    - by zengr
    I have the following folder structure: parent - folder1 - main1.x - main1.y - main1.z - main1-626262.x - main1-626263.x - main1-626264.x - main1-626265.x - main1-626266.x - main1-626267.x - folder2 - main2.x - main2.y - main2.z - main2-726262.x - main2-726263.x - main2-726264.x - main2-726265.x - main2-726266.x - main2-726267.x Now, I want to remove: main-*********.x So, my required folder structure: parent - folder1 - main1.x - main1.y - main1.z - folder2 - main2.x - main2.y - main2.z So, how can I achieve this?

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  • Recursive rm with condition in Linux

    - by zengr
    I have the following folder structure: parent - folder1 - main1.x - main1.y - main1.z - main1-626262.x - main1-626263.x - main1-626264.x - main1-626265.x - main1-626266.x - main1-626267.x - folder2 - main2.x - main2.y - main2.z - main2-726262.x - main2-726263.x - main2-726264.x - main2-726265.x - main2-726266.x - main2-726267.x Now, I want to remove: main-*********.x So, my required folder structure: parent - folder1 - main1.x - main1.y - main1.z - folder2 - main2.x - main2.y - main2.z So, how can I achieve this?

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  • How to use EMF to read XML file?

    - by zengr
    I have to use EMF in one of my class projects. I am trying to understand how to use EMF to do the following: Read XML, Get the values into objects. Use ORM to persist the values in objects to database. - Done Get data from database using ORM and generate XML. I need to do all of that using: EMF (no idea what so ever) and JPA (DONE). I have used JAXB and I know, this can be done using JAXB, but how is (EMF == JAXB)?! I have created many java classes using EMF, but there are so many of them! Where do I implement the read/write methods and how do I run the EMF project? Thanks

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  • "detached entity passed to persist error" with JPA/EJB code

    - by zengr
    I am trying to run this basic JPA/EJB code: public static void main(String[] args){ UserBean user = new UserBean(); user.setId(1); user.setUserName("name1"); user.setPassword("passwd1"); em.persist(user); } I get this error: javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.JPA.Database Any ideas? I search on the internet and the reason I found was: This was caused by how you created the objects, i.e. If you set the ID property explicitly. Removing ID assignment fixed it. But I didn't get it, what will I have to modify to get the code working?

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  • What does template<class key, class type> mean before a method in C++?

    - by zengr
    Hi, I have got this code and I am trying to understand the convention followed, all the method defined in the .cpp file have template<class KeyType, class DataType> written before them. What does that mean? Example: //Constructor template<class key, class type> MyOperation<key, type>::MyOperation() { //method implementation } //A method template<class key, class type> MyOperation<key, type>::otherOperation() { //method implementation } Thanks

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  • Copy hashtable to another hashtable using c++

    - by zengr
    I am starting with c++ and need to know, what should be the approach to copy one hashtable to another hashtable in C++? We can easily do this in java using: HashMap copyOfOriginal=new HashMap(original); But what about C++? How should I go about it? UPDATE Well, I am doing it at a very basic level,perhaps the java example was a wrong one to give. This is what I am trying to implement using C++: I have this hash array and each element of the array point to the head of a linked list. Which has it's individual nodes (data and next pointer). And now, I need to copy the complete hash array and the linked list each node is pointing to.

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  • How does MTOM work + sample code

    - by zengr
    I am trying to make a very simple web-service which does the following: The client hits the web service requesting a file. The web service's service class queries a hashtable which has the key (search query) and the value as the base64encoded value of a file (say a pdf) Now,I need to use MTOM to return the base64encoded value stored in the hashtable to the client. It's upto the client to decode it and convert it to pdf. So, here are my questions: I understand we encode files to base64 for transmission via web service, but where and how does MTOM come into the picture there? Can some one provide me a simple method which uses MTOM and sends the data back. Do we need to specify something in the WSDL too? or a simple String return type would suffice? Why/Why not? Thanks I have seen this code. It uses a lot of annotations, I just need a simple java code using MTOM. New to J2EE HERE :)

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  • Steps in creating a web service using Axis2 - The client code

    - by zengr
    I am trying to create a web service, my tools of trade are: ** Axis2, Eclipse, Tomcat, Ant ** I need to create a web service from Code, i.e. Write a basic java class which will have the methods to be declared in the WSDL. Then use java2WSDL.sh to create my WSDL. So, is this approach correct: Write my Java class with actual business logic package packageNamel; public class Hello{ public void World(String name) { SOP("Hello" + name); } } Now, when I pass this Hello.java to java2WSDL.sh, this will give me the WSDL. Finally, I will write the services.xml file, and create the Hello.aar with following dir structure: Hello.aar packageName Hello.class META-INF services.xml MANIFEST.MF Hello.WSDL Now, I assume, my service will be deployed when I put the aar in tomcat1/webapps/axis2/WEB-INF/services But, here comes my problem, HOW DO I ACCESS THE METHOD World(String name)???!!, i.e. I am clueless about the client code! Please enlighten me on making a very basic web service and calling the method. The above described 3 steps might be wrong. It's a community wiki, feel free to edit. Thanks

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  • Migrate existing ROR app to GAE

    - by zengr
    I have managed to run a basic rails app1 on App Engine using: http://gist.github.com/268192 So, on my basic app2, I install CE, which works fine on local machine. (communityengine.org) But, when I follow the same steps on my actual app2, where community_engine plugin is installed and all the gems are frozen, the app engine installer script asks for to over write various files like boot.rb, routes.rb, which I don't allow. So, as expected, when I publish the rails + ce app to GAE, it's not published and it also screws the local installation of CE on app2. So, the problem is obvious, CE uses ActiveRecord, and GAE uses DataMapper. So, my question can also be rephrased as: Can we migrate an existing ROR App using Active Record to GAE which uses DataMapper? PS: This is my first project on ROR and GAE.

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  • How to debug Java code when using ANT script in Eclipse

    - by zengr
    Hi, I have a java class and I need to debug it (put breakpoints and continue using F6). I am using ANT script to init, build, deploy and run the code. I am using: <javac srcdir="${src.dir}" destdir="${classes.dir}" debug="true" debuglevel="lines,vars,source"> .......... </javac> But when I place the breakpoint in a line in my foo.java class and I run the ant script (the run part, Right Click on run--Debug As--Ant Build), Eclipse does not stop at that line of code. What am I missing out?!

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  • Rails 2.3.4 Vs Rails 3 + Book - Beginner in RoR

    - by zengr
    Hi, I have started with Ruby and Rails development and I am a Java developer from the last 2 years (student). I am in for two things: Learn Ruby Make my website on ROR I have Agile Web Development with Rails, 2nd Edition. So, here are my questions: How is the Agile Web Development with Rails book to start with, where I don't know anything about Ruby and proficient with Java. What is the difference between 2nd and 3rd edition? People say the changes are irrelevant for a starter, how far is that statement correct? Should I start with Rails 2.3.4 or Rails 3 (around the corner)?

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  • Essential topics to be discussed in Linux 101

    - by zengr
    Hi, We are organizing a Linux 101 Workshop for undergrad and grad students. Can you share some ideas/topics that are must for people who are just starting with Linux. Preconditions: No knowledge of Linux OS, philosophy and technical aspects (kernel, shell, commands) Post conditions: A basic crash course of Linux which will give them a good start and answer some basic questions asked on it.

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  • Ideal way to deliver large data over Web Services

    - by zengr
    We are trying to design 6 web services, which will serve another client component. The client component requires data from the web service we are implementing. Now, the problem is, there is not 1 WS we are implementing, there is one WS which the client component hits, this initiates a series (5 more) of WSs which gather data from their respective data stores and finally provide the data back to the original WS, which then delivers the data back to the client component. So, if the requested data becomes huge, then, this will be a serious problem for our internal communication channel. So, what do you guys suggest? What can be done to avoid overloading of the communication channel between the internal WS and at the same time, also delivering the data to the client component.

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  • Correct usage of Voldemort as key-value pair?

    - by zengr
    Hello, I am trying to understand, how can Voldermort be used? Say, I have this scenario: Since, Voldemort is a key-value pair. I need to fetch a value (say some text) on the basis of 3 parameters. So, what will be the key in this case? I cannot use 3 keys for 1 value right, but that value should be search able on the basis of those 3 parameters. Am I making sense? Thanks EDIT1 eg: A blog system. A user posts a blog: User's data stored: Name, Age and Sex The blog content (text) is stored. Now, I need to use Voldemort here, if a user searches from the front end for all the blog posts by Sex: Male Then, my code should query voldemort and return all the "blog content (text)" which have Sex as Male.

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