gatsby - Developer IT

Apache2 proxypass

- by gatsby

i'm trying to figure out why my apache2 reverse proxy doesn't work... hope someone can clarify. i'm using an apache server as a gateway with proxy pass: 10.184.1.2 is the IP. these are PP instructions i inserted in the 000-default config file. ProxyPass / http://192.168.102.31/ ProxyPassReverse / http://192.168.102.31/ the host 192.168.102.31 is an internal IP of a subnet wich is not reachable directly by clients, but only by the apache gateway. when i try to access such a address: http://apache_gateway_name/dir i see the client trying to reach 192.168.102.31 address and of course timeout occurs. can someone help? Best regards

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Java program runtime error

- by Sam

public class BooksTestDrive { public static void main(String[] args) { Books [] myBooks = new Books[3]; int x=0; myBooks[0].title = "The Grapes of Jave"; myBooks[1].title = "The Java Gatsby"; myBooks[2].title = "The Java Cookbook"; myBooks[0].author = "bob"; myBooks[1].author = "sue"; myBooks[2].author = "ian"; while (x < 3) { System.out.print(myBooks[x].title); System.out.print("by"); System.out.println(myBooks[x].author); x = x+1; } } } This code compiles but while runtime, its giving nullpointer exception.

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NHibernate IQueryable Collection as Property of Root

- by Khalid Abuhakmeh

Hello and thank you for taking the time to read this. I have a root object that has a property that is a collection. For example : I have a Shelf object that has Books. // now public class Shelf { public ICollection<Book> Books {get; set;} } // want public class Shelf { public IQueryable<Book> Books {get;set;} } What I want to accomplish is to return a collection that is IQueryable so that I can run paging and filtering off of the collection directly from the the parent. var shelf = shelfRepository.Get(1); var filtered = from book in shelf.Books where book.Name == "The Great Gatsby" select book; I want to have that query executed specifically by NHibernate and not a get all to load a whole collection and then parse it in memory (which is what currently happens when I use ICollection). The reasoning behind this is that my collection could be huge, tens of thousands of records, and a get all query could bash my database. I would like to do this implicitly so that when NHibernate sees and IQueryable on my class it knows what to do. I have looked at NHibernates Linq provider and currently I am making the decision to take large collections and split them into their own repository so that I can make explicit calls for filtering and paging. Linq To SQL offers something similar to what I'm talking about.

Developer IT