Hi Lance, Hi Heinrich
Thank you so much for help me in my problem and take the time to answer me;
I try to implement one of this solution, if I have more questions I hope
that I can communicate with you guys and the all of the members of the
mail-list :)
Best regards,
Diana
2015-02-23 17:27 GMT-05:00 Heinrich Schuchardt <xypron.g...@gmx.de>:
> Hello Diana,
>
> glpk-java/examples/java/GlpkSwing.java shows what needs to be done.
>
> Run glpk/examples/tsp.mod and press the terminate button.
> You will see an output like
>
> ...
> + 7505: mip = 6.859000000e+03 >= 6.729000000e+03 1.9% (143; 254)
> SEARCH TERMINATED BY APPLICATION
> Optimal tour has length 6859
> From node To node Distance
> 1 14 479
> ...
>
> In the program a GlpkCallbackListener is registered with
>
> GlpkCallback.addListener()
>
> In the callback routine of the listener
>
> GLPK.glp_ios_terminate(tree);
>
> signals that no further nodes shall be evaluated.
>
> In the callback routine you will have to evaluate the elapsed runtime to
> decide when to call glp_ios_terminate().
>
> To determine that a feasible solution has been found you could use the
> following code in the callback routine:
>
> int reason = GLPK.glp_ios_reason(tree);
>
> if (reason == GLPKConstants.GLP_IBINGO) {
> // We have a better integer feasible solution.
> }
>
> Do not set tm_lim with glp_iocp.setTm_lim().
>
> Best regards
>
> Heinrich
>
> On 23.02.2015 20:24, Diana Acosta wrote:
> > Hi everybody,
> >
> > I´m working with GLPK for Java and I implemented a MIP problem using GNU
> > MathProg. I have the issue that the time used to obtain a optimal
> > solution it´s more longer that I need; for this reason I decide use the
> > structure glp_iocp to set the time limit of search; this work fine; but
> > I have a problem because my model works with database, I used
> > specifically mysql server and an interface with phpmyadmin, and when the
> > search stop because the time limit was exceed, I have a feasible
> > solution because I know the value of the objective function for MIP
> > solution, but the solution, the values of the variables, isn't write on
> > the database because this limit stop totally the model (file .mod)
> > before can write on database, and there is where I need the answer.
> > So I wanna ask if anybody can help me with a function of a structure of
> > GLPK, that I can use to write the answer on database or with any form to
> > do this,
> >
> > Thank you so much :)
> >
> >
> > --
> > Diana Acosta Rueda
>
>
--
Diana Acosta Rueda
Estudiante de Ingeniería de Telecomunicaciones
Universidad de Antioquia
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