java - Writing to the datastore without closing Persistence Manager -

-

how commit database when updating object using persistencemanager without closing it?

you need commit transaction. don't need close persistencemanager.

persistencemanager p; ... p.currenttransaction().begin(); .... //do work p.currenttransaction().commit();

Comments

Post a Comment

Popular posts from this blog

angularjs - Showing an empty as first option in select tag -

-
my app showing empty select field first entry. have read other solution given , tried still not working. my controller code is: .controller('usercreatecontroller', function(user,profile,auth) { alert("hello"); var vm = this; vm.type = 'create'; profile.all() //this service fetch profiles shown in select field .success(function(data){ vm.profile = data; }); vm.userdata.profile = vm.profile[0]; //here have set default value select field and html page is: <label class="col-sm-2 control-label">profile</label> <div class="col-sm-8"> <select ng-model="user.userdata.profile" ng-options="person._id person.profilename person in user.profile"> </select> </div> hierarchy of vm.profile { "_id": 46, "profile": objectid("5516498e95b84548156db754"), "isactive": true, "password": "$2...
Read more

list - C++ | Queue: Dequeue function crashes program -

-
i attempting make queue in c++ using double linked list. have not tested since stuck @ step dequeue. attempted create temp node, , move around stuff when call delete on head node in queue (called queue), , set head temp node next element, (you can see in code) when call delete, crashes, according ms visual studios 2013. add how weird is, following stack called, after delete called, setprev called , set prev node , crashes there. never call function during of destructors deletes do. try best understand answers still new c++ terminology. below code. oh 1 last thing, in main, did call enqueue once, dequeue once, delete node class ... #ifndef tsdnode_h #define tsdnode_h template <class t> class dnode { private: dnode<t>* next; dnode<t>* prev; t data; public: dnode(t); void setnext(dnode<t>* next); void setprev(dnode<t>* prev); dnode<t>* getnext() const; dnode<t>* g...
Read more

python - argument 2 to map() must support iteration -

-
hi i'm making basic raycast engine think nice start minimap problem class map ask mapgrid in constructor , when pass python give me error argument 2 map() must support iteration this code: main part import pygame def map(object): def __init__(self,grid,scale): self.grid= grid self.mapwidth= len(grid[0]) #number of map blocks self.mapheight= len(grid) self.minimapscale= scale #how many pixels draw map block self.miniwidth= self.mapwidth * self.minimapscale #size of minimap self.miniheight= self.mapheight * self.minimapscale self.rectgrid= grid y in range(self.mapheight): x in range(self.mapwidth): self.rectgrid[y][x]= pygame.rect(x,y,self.miniwidth,self.miniheight) def blitminimap(): pass data file mapgrid= [ [1,1,1,1], [1,0,0,1], [1,0,0,1], [1,1,1,1] ] size = [640, 480] map class import pygame def map(object): def __init__(self,grid,sc...
Read more