runtime

问题 Problem Exploring an option of enabling/disabling a @RequestMapping endpoint on demand without restarting JVM. Implement a kill switch on a endpoint at runtime. Attempt I've tried the following but @RefreshScope does not seem to work with @ConditionOnProperty @RestController @RefreshScope @ConditionalOnProperty(name = "stackoverflow.endpoints", havingValue = "enabled") public class MyController { @Value("${stackoverflow.endpoints}") String value; @RequestMapping(path = "/sample", method =

问题 Is it possible to replace a method of a Moose object at runtime ? By looking at the source code of Class::MOP::Method (which Moose::Meta::Method inherits from) I concluded that by doing $method->{body} = sub{ my stuff } I would be able to replace at runtime a method of an object. I can get the method using $object->meta->find_method_by_name(<method_name>); However, this didn't quite work out. Is it conceivable to modify methods at run time? And, what is the way to do it with Moose? 回答1: Moose

问题 I have on a usercontrol a datagridview. I created a datatable and I set the source of datagrid to be this datatable. I want,at runtime,to be able to add how many rows on gridview I want at every button click. My code : private DataTable CreateTable() { Datatable table=new Datatable(); table.Columns.Add("Name".ToString()); table.Columns.Add("Size".ToString()); DataRow dr = table.NewRow(); dr["Name"] = "Mike"; DataRow dr2 = table.NewRow(); dr2["Name"] = "Ryan; DataRow dr3 = table.NewRow(); dr3[

问题 I had referred this question (I changed its title). I am aware that code generation related to virtual ness are implementation specific. However, earlier question suggests that, there is an additional cost related to virtual inheritance, when calling non-virtual base method. I wrote following test codes and checked its assembly in g++ (with -O4 ): Common part struct Base { int t_size; Base (int i) : t_size(i) {} virtual ~Base () {} int size () const { return t_size; }; }; struct D1 : virtual

问题 im trying to build a usercontrol which contains a tablelayoutpanel. in this panel i need to dynamically add 3 columns with each having different a width and 5 rows which all shell have the same height (20% of the tablelayoutpanel's height). column1 should have an absolute width of 20, column2 depending a width on its content (a textbox with .dock = fill) column3 a width of 30. my code: Private Sub BuildGUI() If Rows > 0 Then tlp.Controls.Clear() tlp.ColumnStyles.Clear() tlp.RowStyles.Clear()

问题 My question is similar to Is there any good dynamic SQL builder library in Java? However one important point taken from above thread: Querydsl and jOOQ seem to be the most popular and mature choices however there's one thing to be aware of: Both rely on the concept of code generation , where meta classes are generated for database tables and fields. This facilitates a nice, clean DSL but it faces a problem when trying to create queries for databases that are only known at runtime . Is there

问题 I got a factory, where Action Script follows an xml and builds DisplayObject hierarchy out of it. It is meant that script doesn't know beforehand what elements it will encounter in xml and therefore doesn't know what user-defined factory classes it will need. I know that it is possible to do something like this: var rect:*, className:String = "flash.geom.Rectangle"; if (ApplicationDomain.currentDomain.hasDefinition(className)) { rect = new(getDefinitionByName(className)); } And Rectangle

问题 Is it possible? I have found solution for Visual Studio Print n levels of callstack? 回答1: To print a backtrace at runtime programmatically, you can use this function: #import <execinfo.h> void PrintBacktrace ( void ) { void *callstack[128]; int frameCount = backtrace(callstack, 128); char **frameStrings = backtrace_symbols(callstack, frameCount); if ( frameStrings != NULL ) { // Start with frame 1 because frame 0 is PrintBacktrace() for ( int i = 1; i < frameCount; i++ ) { printf("%s\n",

问题 What is the best way to enable my webapplication to use JSF files stored in the database? I'd like to be able to dynamically (during runtime) create new JSF pages which will be made available without having to redeploy the application. So in other words: I would like to store the bigger part of my JSF pages in the database and would like JSF to use the database as a datasource for getting JSF files. I've thought long about a solution and found some possible ways. However, I haven't been able

问题 What is the best way to enable my webapplication to use JSF files stored in the database? I'd like to be able to dynamically (during runtime) create new JSF pages which will be made available without having to redeploy the application. So in other words: I would like to store the bigger part of my JSF pages in the database and would like JSF to use the database as a datasource for getting JSF files. I've thought long about a solution and found some possible ways. However, I haven't been able