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Establishing database connection in RCP [message #414229]

Thu, 10 March 2005 00:30

Eclipse User

Hi all,

My app needs to connect to database and keep the connection throghout the
entire apps, where's is most appropriate event to put code to connect to
database ?

Thanks in advance

Setya

Re: Establishing database connection in RCP [message #414906 is a reply to message #414229]

Fri, 11 March 2005 21:32

Eclipse User

The singleton approach is probably the easiest one to implement.
You initialize the connection on first access.
However if you are accessing the connection on the critical path of
opening the workbench (ie in the application, or in the advisors) you
may slow down the startup if connecting to the db is slow.

PaScaL

Setya wrote:
> Hi all,
>
> My app needs to connect to database and keep the connection throghout
> the entire apps, where's is most appropriate event to put code to
> connect to database ?
>
> Thanks in advance
>
>
> Setya
>

Re: Establishing database connection in RCP [message #414931 is a reply to message #414906]

Sun, 13 March 2005 22:47

Eclipse User

Thanks for the response,

> The singleton approach is probably the easiest one to implement.
> You initialize the connection on first access.
> However if you are accessing the connection on the critical path of
> opening the workbench (ie in the application, or in the advisors) you
> may slow down the startup if connecting to the db is slow.

Yes, I'm aware of the effect if the db connection is slow. So basically I
can put the database connection establishing code in application.run
method ?

> PaScaL

Thanks.

Setya

Re: Establishing database connection in RCP [message #416816 is a reply to message #414931]

Sun, 20 March 2005 03:27

Eclipse User

Originally posted by: shashireo.hotmail.com

Setya wrote:
> Thanks for the response,
>
>> The singleton approach is probably the easiest one to implement.
>> You initialize the connection on first access.
>> However if you are accessing the connection on the critical path of
>> opening the workbench (ie in the application, or in the advisors) you
>> may slow down the startup if connecting to the db is slow.
>
>
> Yes, I'm aware of the effect if the db connection is slow. So basically
> I can put the database connection establishing code in application.run
> method ?

I think you can make the application responsive enough by starting a
background job for the database connection.
http://www.eclipse.org/articles/Article-Concurrency/jobs-api .html

Shashi

>
>> PaScaL
>
>
> Thanks.
>
>
> Setya
>
>

Re: Establishing database connection in RCP [message #416818 is a reply to message #416816]

Sun, 20 March 2005 05:22

Eclipse User

Shashi wrote:

> Setya wrote:
>> Thanks for the response,
>>
>>> The singleton approach is probably the easiest one to implement.
>>> You initialize the connection on first access.
>>> However if you are accessing the connection on the critical path of
>>> opening the workbench (ie in the application, or in the advisors) you
>>> may slow down the startup if connecting to the db is slow.
>>
>>
>> Yes, I'm aware of the effect if the db connection is slow. So basically
>> I can put the database connection establishing code in application.run
>> method ?

> I think you can make the application responsive enough by starting a
> background job for the database connection.
> http://www.eclipse.org/articles/Article-Concurrency/jobs-api .html

> Shashi

>>
>>> PaScaL
>>
>>
>> Thanks.
>>
>>
>> Setya
>>
>>

Great article, thank you very much Sashi.

Regards,

Setya

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