publish subscribe - Remove read topic from DDS -


I have a problem subscribing to data (using the Java platform) When a customer subscribes to a topic, Then the data containing that subscription should be removed from the DDS. But in my case whenever I subscribe to the data, the same data is subscribed multiple times. The data has not been removed from DDS. I tried with QoS but I do not know how to use it.

Please suggest how I can remove the data I read from DDS.

This behavior is not due to your QOS settings, but to reach DataReader Is by your method When you retrieve your data, you are probably making some calls in one of the following loopholes in the read () : 

  FooReader.read (DataSec, information SEC, 10, ANIISAMAPMEDAAT, value, ANY_VIEW_STATE.value, ANY_INSTANCE_STATE.value);   
  reading ()  The method applied will return all existing samples in your  FooReader . After reading  () , these samples are still available in  FooReader , so the  read ()  method behaves. Think about reading as "Peak". The next time you invite the  read ()  method in this way, you will see all the samples you had seen before, as long as They have a  DataWriter .  
 To solve your problem, you can replace  reading ()  with  LE () , like this:  
  FooReader.take (DataSec, Information SEC, 10, ANIASAMPLAYAD.AV, ANAI_XIDE_A.A.A.U.E.A.A.A., ANIICIETXT.T.T.AVU);   
  LE ()  method  reading ()  is different from the method in which it reads a destroyer; It not only reads the data but also removes it from the  FooReader , in this way, you will not get the same sample twice. In fact, if you resist  as read ()  as opposed to  reading () , you will never be able to see a sample twice.  
 Another way to solve your problem is to stick to  reading () , but the requested  SAMPLE_STATE  to  any  Adjust  NOT_READ  from:  
  FooReader.read (DataSec, info SEC, 10, NOT_READ_SAMPLE_STATE.value, ANY_VIEW_STATE.value, ANY_INSTANCE_STATE.value );   
 In this way, you will only read samples that you have not read before in this case. In this case the difference with  LE ()  is that the data is in your  FooReader  which can be useful if you want to read it again at the later level (in that case you have to resist the  NOT_READ  to get the previously read samples < Code> any  sample status is to be used).

Comments

Post a Comment

Popular posts from this blog

python - Assemble mpeg file unable to play in mediaplayer -

I am currently working on a school project and I think that is to gather some problems with the MPEG file I The scope of my project is: 1) Split the MPEG file into pieces of many fixed sizes. 2) Collecting some of them and leaving some part. Problem 1: When I run the file in the media player, it will play the video until it reaches that segment which I left Give it Example: Chunk = ["yui_1", "yui_2", "yui_3", "yui_5", "yui_6"] Duration of each segment: 1 second * If you think I have left the "yui_4" section. * If I went to collect all the parts except "yui_4", then the video will play the first 2 seconds before being hanged throughout the period. Problem 2: When I gather the first part off the part, it is unable to run the full MPEG file is. Duration of each piece: 1 second Example: wheel = ["yui_2", "yui_3", "yui_4", "yui_5", "yui_6"...
Read more

c# - crystal report failed -

I have created a crystal report with parameters, but this does not load the value. It only shows the title, I mean column name only. Please check your code and correct me. And I tried to load that report in PDF format, which shows an error like "Load report failed" Please correct me. Protected Zero Button 2_Click (Object Sender, EventArgs E) {Report Document Reports Document = New Report Document (); Reportdocument.Load (Server.MapPath ("CrystalReport.rpt")); Reportdocument.SetDatabaseLogon ("", "", "Arvind", "My ScamDDB"); Report document. Setpermator val ("mrno", textbox 1. text); CrystalReportViewer1.ReportSource = Report Document; } Secure Zero LinkButton1_Click (Object Sender, EventArgs E) {Exportport (); Private Zero Exports () {MemoriStream Ostream; Response.Clear (); reaction. Buffer = true; Report Document Report Document = New Report Document (); Reportdocument.Load (Server.MapPath ("CrystalReor...
Read more

mongodb - CakePHP paginator ignoring order, but only for certain values -

While pagging my user model in kppp, I can sort with some values, but not others. For example, I can order results from created or email , for example, but username or reputation seems to come back order by arbitrary command for example with a list of users: $ this-> paginate = array ('condition' => array ( 'User.is_active' = & gt; true), 'border' => 24, 'order' => array ('User.created' => DESC)); Works as expected, but $ this - & gt; Paged = array ('conditions' = & gt; array (' user.isIactive '= & gt; true),' border '= & gt; 24,' command '= & gt; array (' user repeats' = ' & Gt; DESC ')); No, no. I first thought that this could be a database issue, but when I search the database directly, sorted as expected. Note: I am using Mangodebi with the Mongo DB plugin of Ichikawa for the KPPHP; Pagnetizing users are used to work properl...
Read more