Nobody here who can help ? > -----Ursprüngliche Nachricht----- > Von: Norbert Hirneisen [mailto:no...@s2you.de] > Gesendet: Freitag, 17. September 2010 11:01 > An: user@struts.apache.org > Betreff: Struts 1 and thread safety > > > Hello, > > I have al large Struts 1 application with a modified > DispatchAction class. Most > action classes are derivatives from this class. > In the webapp I have several projects defined. The project > can be determined by > analysing the URL. > This is done in the central DispatchAction-class by using > class fields declared > as volatile. The execute-Method is declared as synchronized. > After reading a lot about thread safety now I´m not sure if > this approach is > thread safe on a request level. > Abbreviated example: > > public abstract class DispatchAction extends Action { > .... > protected volatile long projectId = -1; > .... > > @Override > synchronized public ActionForward execute( > ActionMapping mapping, > ActionForm form, > HttpServletRequest request, > HttpServletResponse response) > throws Exception { > ... > long projectId = Project.getIdFromRequest(request); > ... > return forward; > } > > When I access projectId from a derived class is this thread > safe or have I to > implement in the doExecute-Method of each derived action > class ? This would be > thread safe but comes with a lot of redundant code. > > Any help would be helpful. > > Best regards, > Norbert > > > > Norbert Hirneisen > > science4you Online-Monitoring > http://www.science4you.org > email: no...@s2you.de > > Die Falternacht: www.falternacht.de > Werden Sie Falterzähler: www.falterfunde.de > Wanderfalter: www.science4you.org/platform/monitoring/index.do > Tagfalter-Monitoring Deutschland: > www.science4you.org/platform/tmd/tmd-top/index.do > Infos über geschützte Arten ? http://www.wisia.de > > Norbert Hirneisen > Science & Communications > > von-Müllenark-Str. 19 > 53179 Bonn > Tel. 0228/6194930 > Ust.ID-Nr. DE237150377 > > Der Inhalt dieser Mitteilung ist nur für obigen Adressaten > bestimmt und streng > vertraulich. Eine Weitergabe oder Vervielfältigung durch > andere als den > Adressaten ist verboten! Sollten Sie diese Nachricht > irrtümlich erhalten haben, > ersuchen wir Sie um sofortige Verständigung und darum, > sämtliche Dateien von > Ihrem Computer zu löschen. Unsere E-Mail sind geprüft, > erfolgen jedoch ohne > Gewähr. > > The information contained in this message is intended only > for the adressee. It > is strictly confidential. Any distribution, copying or > disclosure by anyone but > the adressee is prohibited. In case you have received this > message in error, > please notify us immediately and delete it form your system. > Any liability for > information send via email of us is excluded. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@struts.apache.org > For additional commands, e-mail: user-h...@struts.apache.org >
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