BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How to return a recordset???          BorlandTalk.com Forum Index -> JBuilder Applet Issues View previous topic :: View next topic   Author Message Davisote Guest Posted: Mon Apr 04, 2005 8:10 pm    Post subject: How to return a recordset??? Hi. I'm implementing a client-server application. The client is an applet and the server is a normal application. From the applet I send a string with the query and in the server I execute this query and I get a recordset (and everything is ok). My problem is how to make my recordset serializable so I can transfer over the net.??? I 've seen some examples, but I can understand how is it?.. Any help??? Thanks. Back to top Kevin Dean [TeamB] Guest Posted: Tue Apr 05, 2005 1:52 am    Post subject: Re: How to return a recordset??? Davisote wrote: Quote: Hi. I'm implementing a client-server application. The client is an applet and the server is a normal application. From the applet I send a string with the query and in the server I execute this query and I get a recordset (and everything is ok). My problem is how to make my recordset serializable so I can transfer over the net.??? I 've seen some examples, but I can understand how is it?.. Any help??? Thanks. The RecordSet itself is not serializable. You can, however, serialize the data. Pseudo-code for this is: Collection records = new ArrayList(); Iterator rsi = myRecordSet.iterator(); while (rsi.hasNext()) { MyValueObject mvo = new MyValueObject(); // Populate mvo with data from recordset. // ... records.add(mvo); } You have to make sure that the MyValueObject class is serializable. The above is the most common technique and should work quite well for you. -- Kevin Dean [TeamB] Dolphin Data Development Ltd. http://www.datadevelopment.com/ NEW WHITEPAPERS Team Development with JBuilder and Borland Enterprise Server Securing Borland Enterprise Server http://www.datadevelopment.com/papers/index.html Please see Borland's newsgroup guidelines at http://info.borland.com/newsgroups/guide.html Back to top Davisote Guest Posted: Thu Apr 07, 2005 10:29 pm    Post subject: Re: How to return a recordset??? Thanks both. "Paul Nichols (TeamB)" <paul (AT) comp (DOT) net> escribió en el mensaje news:4254a4dc$1 (AT) newsgroups (DOT) borland.com... Quote: "Davisote" <yeses (AT) hotmail (DOT) com> wrote in message news:42519f4d (AT) newsgroups (DOT) borland.com... My problem is how to make my recordset serializable so I can transfer over the net.??? I 've seen some examples, but I can understand how is it?.. RecordSet's as Kevin mentioned is not serializable, nor should it be. Having a live resultset that is remotable, would mean some type of locking on the database itself, which is not something you would want to hold for any amount of time, while you pass the recordset across the net domain. Kevin gave you one approach (using a serializable class to hold records), or you can opt to use a cachedrowset, which can be used and does not hold live connects to the database. See http://www.javaworld.com/javaworld/jw-02-2001/jw-0202-cachedrow.html and http://www.onjava.com/pub/a/onjava/2004/06/23/cachedrowset.html for examples on doing precisely what you wish to do. Back to top Paul Nichols (TeamB) Guest Posted: Fri Apr 08, 2005 3:20 am    Post subject: Re: How to return a recordset??? "Davisote" <yeses (AT) hotmail (DOT) com> wrote My problem is how Quote: to make my recordset serializable so I can transfer over the net.??? I 've seen some examples, but I can understand how is it?.. RecordSet's as Kevin mentioned is not serializable, nor should it be. Having a live resultset that is remotable, would mean some type of locking on the database itself, which is not something you would want to hold for any amount of time, while you pass the recordset across the net domain. Kevin gave you one approach (using a serializable class to hold records), or you can opt to use a cachedrowset, which can be used and does not hold live connects to the database. See http://www.javaworld.com/javaworld/jw-02-2001/jw-0202-cachedrow.html and http://www.onjava.com/pub/a/onjava/2004/06/23/cachedrowset.html for examples on doing precisely what you wish to do. 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