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  • UriBuilder incorrectly encoding Query Parameters value ?

    - by Fred
    Lets consider the following code sample where a path and single parameter are encoded... Parameter name: "param" Parameter value: "foo/bar?aaa=bbb&ccc=ddd" (happens to be a url with query parameters) String test = UriBuilder.fromPath("https://dummy.com"). queryParam("param", "foo/bar?aaa=bbb&ccc=ddd"). build().toURL().toString(); The encoded URL string returned is: "https://dummy.com?param=foo/bar?aaa%3Dbbb&ccc%3Dddd" Is this correct ? Should not the character "&" (and may be even "?") be encoded in the parameter value string ? Would not the URL produced be interpreted as follow: One first parameter, name="param", value = "ar?aaa%3Dbbb" followed by a second parameter, name="ccc%3Dddd", without value.

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  • Slow insert speed in Postgresql memory tablespace

    - by Prashant
    Hi, I have a requirement where I need to store the records at rate of 10,000 records/sec into a database (with indexing on a few fields). Number of columns in one record is 25. I am doing a batch insert of 100,000 records in one transaction block. To improve the insertion rate, I changed the tablespace from disk to RAM.With that I am able to achieve only 5,000 inserts per second. I have also done the following tuning in the postgres config: Indexes : no fsync : false logging : disabled Other information: - Tablespace : RAM - Number of columns in one row : 25 (mostly integers) - CPU : 4 core, 2.5 GHz - RAM : 48 GB I am wondering why a single insert query is taking around 0.2 msec on average when database is not writing anything on disk (as I am using RAM based tablespace). Is there something I am doing wrong? Help appreciated. Prashant

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  • Memory issue regarding UIImageView on IPhone 4.0 / IPad

    - by Sagar Mane
    Hello All, My Application is crashing due to low memory [ Received memory warning level 1 + 2] To trace this I have used Instrument and come with following points Test Enviorment : Single view controller added on Window When I don't use UIImageView Real Memory is used 3.66 MB When I uses UIImageView with Image having size 25 KB : Real Memory is used 4.24 MB. almost 560 KB extra when compare to w/o UIImageView and which keep on adding as I am adding more UIImageview on the view. below is sample code for adding UIImageview which I am refering UIImageView* iSplashImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default-Landscape.png"]]; iSplashImage.frame = CGRectMake(0, 0, 320, 480); [self.window addSubview:iSplashImage]; AND dealloc if(iSplashImage) { [iSplashImage release]; iSplashImage = nil; } Issue is this 560 KB is not getting release and after some time application receives low memory warning. Can anyone point out if I am missing something or doing else. As My application uses lots of Images in One session. Thanks in Advance, Sagar

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  • SQL Server 2000 tables

    - by klork
    We currently have an SQL Server 2000 database with one table containing data for multiple users. The data is keyed by memberid which is an integer field. The table has a clustered index on memberid. The table is now about 200 million rows. Indexing and maintenance are becoming issues. We are debating splitting the table into one table per user model. This would imply that we would end up with a very large number of tables potentially upto the 2,147,483,647, considering just positive values. My questions: Does anyone have any experience with a SQL Server (2000/2005) installation with millions of tables? What are the implications of this architecture with regards to maintenance and access using Query Analyzer, Enterprise Manager etc. What are the implications to having such a large number of indexes in a database instance. All comments are appreciated. Thanks

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  • PBKDF2-HMAC-SHA1

    - by Jason
    To generate a valid pairwise master key for a WPA2 network a router uses the PBKDF2-HMAC-SHA1 algorithm. I understand that the sha1 function is performed 4096 times to derive the PMK, however I have two questions about the process. Excuse the pseudo code. 1) How is the input to the first instance of the SHA1 function formatted? SHA1("network_name"+"network_name_length"+"network_password") Is it formatted in that order, is it the hex value of the network name, length and password or straight ASCII? Then from what I gather the 160 bit digest received is fed straight into another round of hashing without any additional salting. Like this: SHA1("160bit digest from last round of hashing") Rise and repeat. 2) Once this occurs 4096 times 256 bits of the output is used as the pairwise master key. What I don't understand is that if SHA1 produces 160bit output, how does the algorithm arrive at the 256bits required for a key? Thanks for the help.

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  • How to recognize touch events and control a script object inside UIWebView?

    - by Markus S.
    Situation: I have an UIView with an UIWebView in it. When the viewDidLoad the Javascript Object inside the UIWebView is called (Microsoft Seadragon AJAX JS). For your Understanding: Seadragon loads a specified megapixel image(JPEG) and in a Desktop Browser like Firefox i can Zoom into the image and I can drag the crop for example from the middle to the left. In the iPhone Simulator (for iPad) only the Zooming Function is working on one single tap but when i try to drag the crop (with left mouse button click and holding it) I'm dragging the whole UIWebView but not the crop of course! Is that feature which the simulator isn't able to handle or what's yout solutin guys? Special Thanks!! P.S.: It's a bit jiggling when the zooming function of Seadragon is called. Is that authentic to the real performance of the iPad or does the simulator not have the power as the iPad has?

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  • How do you use Linq2Sql in your applications ?

    - by this. __curious_geek
    I'm recently migrating to Linq2Sql and all my future projects would be done in Linq2Sql. Having said that, I researched a lot on how to properly plug-in Linq2Sql in application design. what to put at what layer ? Should I use DTOs over Linq2Sql entities ? I did not find any rock-solid material that really talked about one single thing and everyone had their own opinions and I found all of them justified right from their arguments. I'm looking forward to your ideas on how to integrate/use Linq2Sql in projects. My priority is maintenance[it should be maintenable and when multiple people work on same project] and scalabilty [it should have scope of evolution]. Thanks.

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  • Rendering spatial data of GeoQuerySet in a custom view on GeoDjango

    - by dmytro
    Hello. I have just started my first project on GeoDjango. As a matter of fact, with GeoDjango powered Admin application we all have a great possibility to view/edit spatial data, associated with the current object. The problem is that after the objects having been populated I need to render several objects' associated geometry at once on a single map. I might implement it as a model action, redirecting to a custom view. I just don't know, how to include the OpenLayers widget in the view and how to render there my compound geometry from my GeoQuerySet. I would be very thankful for any hint from an experienced GeoDjango programmer.

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  • Javas Math.sin() produces NaN all the time

    - by milan1612
    Forgive me if this is a dumb beginners problem, but I really don't get it. I have a member variable declared like so: public Double Value; When I assign 3.14159265 to Value and try to compute the sine of it, this happens: system.out.println(Value.toString()); //outputs 3.14159265 Value = Math.sin(Value); system.out.println(Value.toString()); //outputs NaN In fact, this happens with every single value I tried - even with 0! Math.sin() seems to always produce NaN as a result, regardless of the arguments value. The docs say: If the argument is NaN or an infinity, then the result is NaN. But my argument is clearly not NaN or infinity! What the heck is happening there?

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  • How do i create a group of h:selectOneRadio in JSF?

    - by Nitesh Panchal
    Hello, I am trying to create a grooup of h:selectOneRadio but ui:repeat gives it different id for each row. This is my code :- <ui:repeat id="themes" value="#{RegisterBean.objBlogTemplateList}" var="item"> <p:graphicImage alt="#{item.templatePicName}" style="border: solid 5px white;width: 200px;height: 200px;" value="#{app:getCommonImagePath(item.templatePicName)}"/> <h:selectOneRadio rendered="false" value="#{RegisterBean.blogTemplateId}" layout="lineDirection" id = "rdTemplateId"> <f:selectItem itemLabel="#{item.templateName}" itemValue="#{item.templateId}"/> </h:selectOneRadio> </ui:repeat> Actually i want to create a single radio button with different selectItems in it which should be from the rows of my table in database. How do i do this?

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  • T-SQL How To: Compare and List Duplicate Entries in a Table

    - by Dan7el
    SQL Server 2000. Single table has a list of users that includes a unique user ID and a non-unique user name. I want to search the table and list out any users that share the same non-unique user name. For example, my table looks like this: ID User Name Name == ========= ==== 0 parker Peter Parker 1 parker Mary Jane Parker 2 heroman Joseph (Joey) Carter Jones 3 thehulk Bruce Banner What I want to do is do a SELECT and have the result set be: ID User Name Name == ========= ==== 0 parker Peter Parker 1 parker Mary Jane Parker from my table. I'm not a T-SQL guru. I can do the basic joins and such, but I'm thinking there must be an elegant way of doing this. Barring elegance, there must be ANY way of doing this. I appreciate any methods that you can help me with on this topic. Thanks! ---Dan---

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  • Empty accessors do matter? Regarding value types and their modification

    - by Petr
    Hi, I have following code that does not work due to "a" being a value typed. But I thought it would not work even without accessors, but it did: class Program { a _a //with accessors it WONT compile { get; set; } static void Main(string[] args) { Program p = new Program(); p._a.X = 5; //when both accessors are deleted, compiler does not //complain about _a.X not being as variable } } struct a { public int X; } It does not work as "a" is struct. But when I delete accessors from "_a" instance, it works. I do not understand why. Thanks

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  • How to recover gracefully from a C# udp socket exception

    - by Gearoid Murphy
    Context: I'm porting a linux perl app to C#, the server listens on a udp port and maintains multiple concurrent dialogs with remote clients via a single udp socket. During testing, I send out high volumes of packets to the udp server, randomly restarting the clients to observe the server registering the new connections. The problem is this: when I kill a udp client, there may still be data on the server destined for that client. When the server tries to send this data, it gets an icmp "no service available" message back and consequently an exception occurs on the socket. I cannot reuse this socket, when I try to associate a C# async handler with the socket, it complains about the exception, so I have to close and reopen the udp socket on the server port. Is this the only way around this problem?, surely there's some way of "fixing" the udp socket, as technically, UDP sockets shouldn't be aware of the status of a remote socket? Any help or pointers would be much appreciated. Thanks.

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  • How to change line thickness in iText?

    - by drasto
    I'm drawing images to pdf using Java framework iText. I need to draw lines of specified width. There is a method setLineWidth(float width) in class PdfContentByte that should change it. However no matter what value I pass as its parameter the lines drawn are always extra thin. There is following line in javadoc of setLineWidth: The line width specifies the thickness of the line used to stroke a path and is measured in user space units. I don't know what is "space unit". Everything else in iText seems to be measured in point(around 1/72 inch). I cant find any reference to what are those "space units" and how to change them. code: to.setLineWidth(thickness); to.moveTo(x, y); to.lineTo(x + 100, y + 100); Variable to contains instance of PdfContentByte.

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  • Entity framework and many to many queries unusable?

    - by John Landheer
    I'm trying EF out and I do a lot of filtering based on many to many relationships. For instance I have persons, locations and a personlocation table to link the two. I also have a role and personrole table. EDIT: Tables: Person (personid, name) Personlocation (personid, locationid) Location (locationid, description) Personrole (personid, roleid) Role (roleid, description) EF will give me persons, roles and location entities. EDIT: Since EF will NOT generate the personlocation and personrole entity types, they cannot be used in the query. How do I create a query to give me all the persons of a given location with a given role? In SQL the query would be select p.* from persons as p join personlocations as pl on p.personid=pl.personid join locations as l on pl.locationid=l.locationid join personroles as pr on p.personid=pr.personid join roles as r on pr.roleid=r.roleid where r.description='Student' and l.description='Amsterdam' I've looked, but I can't seem to find a simple solution.

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  • Specify JDK for Maven to use

    - by DanInDC
    Hi all. I am trying to build a Hudson plugin I've modified and it requires jdk1.6. This is fine, but I don't see how I can tell maven where the different jdk is. I've found few mentions on the internet but they don't seem to apply to me. Some suggest adding some config to .m2/settings.xml but I don't have a settings.xml. Plus, I don't want to use 1.6 for all maven builds. One kink is I am using mvn in cygwin, if that matters at all. It appears I should be able to make the specification in the project pom file, but the existing pom is pretty bare. So bottom line is, is there a way to specify a jdk for a single invocation of maven?

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  • ASP.Net State Server on EC2 not connection

    - by CountCet
    I am trying to set up an Asp.Net State Server on Amazon EC2. The single web server using this State Server is also on EC2. I've done the following things. I've added the IIS role on the State Server. I changed the value in the registry to allow connections for the service and started the aspstate service. I verified it is listening on port 42424 by checking netstat. I edited the web.config of the Web server to point to this server. I added the the tcp port to my EC2 security group and allowed it for all incoming ip's. Anything else I am not doing?

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  • ImageView scale type not working in list activity

    - by Justin
    I have used ImageView's before and understand the different scale types that can be set... However I am having an incredibly difficult time trying to get an ImageView to scale properly in the row of a ListActivity or an ExpandableListActivity. I have tried setting the android:scaleType property to every single value but the image never scales down. I have set the min and max sizes as well and they don't seem to have any effect. I have done both of these things in both the XMl and in code to no avail... Does anyone have any ideas or perhaps a workaround? Thanks in advance!

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  • XML::LibXML Line Ending (whitespace) Problem.

    - by Gilbeg
    HI, I am parsing an XML file using LibXML in Perl. The problem that I have is the ending characters (whitespace) is treated as a text node. For instance, given an input like the following abc 123 The parser thinks that the number of child of node "books" is 3, they are: - text node (containing the char between and - element node of "book" - text node (containing the char between and Question is how do I tell LibXML to ignore whitespaces? I tried with no_blanks (that is $parser = XML::LibXML-new(no_blanks = 1) when construction the parser) but it seems that it has no effect. Thanks in advance

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  • jQuery won't parse my JSON from AJAX query

    - by littlecharva
    Hi, I'm having difficulty parsing some JSON data returned from my server using jQuery.ajax() To perform the AJAX I'm using: $.ajax({ url: myUrl, cache: false, dataType: "json", success: function(data){ ... }, error: function(e, xhr){ ... } }); And if I return an array of items then it works fine: [ { title: "One", key: "1" }, { title: "Two", key: "2" } ] The success function is called and receives the correct object. However, when I'm trying to return a single object: { title: "One", key: "1" } The error function is called and xhr contains 'parsererror'. I've tried wrapping the JSON in parenthesis on the server before sending it down the wire, but it makes no difference. Yet if I paste the content into a string in Javascript and then use the eval() function, it evaluates it perfectly. Any ideas what I'm doing wrong? Anthony

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  • Receiving messages part by part from serial port using c#

    - by karthik
    I am using the below code to receive the messages from serial port using c# void comPort_DataReceived(object sender, SerialDataReceivedEventArgs e) { if (comPort.IsOpen == true) { string msg = comPort.ReadExisting(); MessageBox.Show(msg.Trim()); } } The problem is, i am getting the messages part by part. Like, if u send "Hello, How are you" I am receiving it word by word. I want that in a single stretch. How can i do ?? Also, is it possible to retrieve the port name from which the application is sending and receiving messages ?

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  • What is the complexity of the below code with respect to memory ?

    - by Cshah
    Hi, I read about Big-O Notation from here and had few questions on calculating the complexity.So for the below code i have calculated the complexity. need your inputs for the same. private void reverse(String strToRevers) { if(strToRevers.length() == 0) { return ; } else { reverse(strToRevers.substring(1)); System.out.print(strToRevers.charAt(0)); } } If the memory factor is considered then the complexity of above code for a string of n characters is O(n^2). The explanation is for a string that consists of n characters, the below function would be called recursively n-1 times and each function call creates a string of single character(stringToReverse.charAT(0)). Hence it is n*(n-1)*2 which translates to o(n^2). Let me know if this is right ?

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  • Boolean 'NOT' in T-SQL not working on 'bit' datatype?

    - by Joannes Vermorel
    Trying to perform a single boolean NOT operation, it appears that under MS SQL Server 2005, the following block does not work DECLARE @MyBoolean bit; SET @MyBoolean = 0; SET @MyBoolean = NOT @MyBoolean; SELECT @MyBoolean; Instead, I am getting more successful with DECLARE @MyBoolean bit; SET @MyBoolean = 0; SET @MyBoolean = 1 - @MyBoolean; SELECT @MyBoolean; Yet, this looks a bit a twisted way to express something as simple as a negation. Am I missing something?

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  • Removing http301 redirect from client's cache

    - by ChessWhiz
    Hi, I have a server/client architecture where the client hits the ASP.NET server's service at a certain host name, IP address, and port. Without thinking, I logged on to the server and set up permanent HTTP301 redirection through IIS from that service to another URL that the machine handles via IIS (same IP and port), mistakenly thinking it was another site that is hosted there. When the client hit the server at the old host name, it cached the permanent redirect. Now, even though I have removed the redirection, the client no longer uses the old address. How can I clear the client's cache so that it no longer stores the redirect? I have read about how permanent HTTP301 can be, but in this case, it should be possible to reset a single client's knowledge of the incorrectly-learned host name. Any ideas?

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  • What is the best option for reading Java property files?

    - by Mr Morgan
    Hello I have an application which uses a servlet to read an intialization parameter from web.xml for the location of a property file. The serlvet then creates an instance of a class which stores the location of the file for other programs to read as required. This class has appropriate get and set methods. But my question concerns access to the properties: should the physical property file be read by each program as at runtime or should the properties be stored in memory instead? The properties are not currently altered at runtime but this could change? I've seen various alternative approaches but am not sure which is best. Thanks Mr Morgan

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