Whether to use JNI-JDBC from C++ OR directly use C++ API for connecting to Sybase RDBMS
Hi, I have a design problem to solve. Please suggest a better solution based on your experience. 1)Whether it is advisable to directly connect to Sybase DB using some approriate API from a C++ Application? Or 2)Is it better to go for JNI Wrapper on the JDBC calls to connect to Sybase DB from C++ App. Problem definition: We have a C++ core application which logs to a file the packets which it grabs from an port/Interface at realtime and at the sametime sends it to a Web based GUI application over a socket connection.The logging in file is done, so that the same packet information can be replayed in offline mode. Now we have the requirement is to replace the log files with a standard RDBMS. And we have decided to go for Sybase RDBMS. SO in this new scenario, the C++ core application will populate the DB and at the same time send the information on a socket to GUI for reporting purpose in raltime mode. In offline mode, the Java based GUI would directly query the RDBMS to get the data already populated during the realtime mode. The design goal would be have good Performance, since we are dealing with realtime data on an interface, we should be populating the RDBMS with every packet that is being read on the interface without loosing any packet As GUI is Java based it looks cleaner to have all Java based solution. For queries from GUI obvious choice is to go for JDBC as Sybase RDBMS is very well supported by JDBC driver and more over GUI side there is no much of a performance issue. But the issue is only in C++ core code which will populate the Database.So my questions in the beginiing apply to only this issue. Now with 1st approach I feel it would be a performance efficient solution, but I do not know have much idea or have used any APIs for directly connecting to Sybase from an C++ API. Does Sybase provide any APIs for this solution? If so does it come along with Sybase RDBMS? Because we are looking for some freeware preferably. 2nd approach: By using JNI as the glue between C++, which in turn will make JDBC calls to populate the Sybase RDBMS, will it degrade the performance? The advantage with this approach is that even if C++ code is ported to java or for whatever reason RDBMS changes then there is nothing much to change.Has anybody tried this approach. If so can you please give some hints as to how to go about and some example code if possible. If anyone has encountered similar problem, please let me know the pros and cons of both approach. Thanking you in advance, Regards, Sunita
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sunita
10/24/2002 1:11:26 PM
sybase.ase.general
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sudesai@cisco.com wrote... > Hi, > > I have a design problem to solve. Please suggest a better solution based on > your experience. > > 1)Whether it is advisable to directly connect to Sybase DB using some > approriate API from a C++ Application? Or > 2)Is it better to go for JNI Wrapper on the JDBC calls to connect to Sybase > DB from C++ App. > > Problem definition: We have a C++ core application which logs to a file the > packets which it grabs from an port/Interface at realtime and at the > sametime sends it to a Web based GUI application over a socket > connection.The logging in file is done, so that the same packet information > can be replayed in offline mode. Now we have the requirement is to replace > the log files with a standard RDBMS. And we have decided to go for Sybase > RDBMS. SO in this new scenario, the C++ core application will populate the > DB and at the same time send the information on a socket to GUI for > reporting purpose in raltime mode. In offline mode, the Java based GUI would > directly query the RDBMS to get the data already populated during the > realtime mode. > > The design goal would be have good Performance, since we are dealing with > realtime data on an interface, we should be populating the RDBMS with every > packet that is being read on the interface without loosing any packet > > As GUI is Java based it looks cleaner to have all Java based solution. For > queries from GUI obvious choice is to go for JDBC as Sybase RDBMS is very > well supported by JDBC driver and more over GUI side there is no much of a > performance issue. > But the issue is only in C++ core code which will populate the Database.So > my questions in the beginiing apply to only this issue. > > Now with 1st approach I feel it would be a performance efficient solution, > but I do not know have much idea or have used any APIs for directly > connecting to Sybase from an C++ API. Does Sybase provide any APIs for this > solution? If so does it come along with Sybase RDBMS? Because we are looking > for some freeware preferably. > > 2nd approach: By using JNI as the glue between C++, which in turn will make > JDBC calls to populate the Sybase RDBMS, will it degrade the performance? > The advantage with this approach is that even if C++ code is ported to java > or for whatever reason RDBMS changes then there is nothing much to > change.Has anybody tried this approach. If so can you please give some hints > as to how to go about and some example code if possible. > If anyone has encountered similar problem, please let me know the pros and > cons of both approach. You can certainly connect to ASE through an API from C++. I don't use C++ so I can't comment any further on that. When Open Client is installed on a machine you can choose to install sample code. On my Win2K machine the location is C:\sybase\OCS-12_0\sample\ctlib. IMO, performing the insert directly from the C++ application is the ideal situation. It should be the fastest method and present fewer problems due to fewer layers. -- Jim Egan [TeamSybase]
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Jim
11/1/2002 10:28:14 PM
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