Any application shutdown hooks?
Hi, If I am writing a database library such as DSL, Data Service Layer, there is a need for me to do a good clean up for the connections/results sets/transactions that this library is currently handling. How ever, if another library/package somewhere else calls for a java.lang.Runtime#public void addShutdownHook(Thread hook) How do code or what library to use? can someone please provide a simple working D example for try out. Of cause, in Even in Java there is event if some cleaning lady were to accidentally unplug the main socket of your server. :) -- Matthew Ong email: on...@yahoo.com
Re: Any application shutdown hooks?
http://www.digitalmars.com/d/2.0/class.html#StaticDestructor -Steve
Re: Any application shutdown hooks?
On 5/25/2011 11:13 PM, Steven Schveighoffer wrote: http://www.digitalmars.com/d/2.0/class.html#StaticDestructor -Steve Static Destructor maybe executed when the class is being unloaded GC? Because this is a class level. It is more like the application level exit and such. That is not really the same as: http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Runtime.html#addShutdownHook%28java.lang.Thread%29 This is triggered when: # The program exits normally, when the last non-daemon thread exits or when the exit (equivalently, System.exit) method is invoked, or # The virtual machine is terminated in response to a user interrupt, such as typing ^C, or a system-wide event, such as user logoff or system shutdown. -- Matthew Ong email: on...@yahoo.com
Re: Any application shutdown hooks?
On 05/25/2011 08:35 AM, Matthew Ong wrote: On 5/25/2011 11:13 PM, Steven Schveighoffer wrote: http://www.digitalmars.com/d/2.0/class.html#StaticDestructor -Steve Static Destructor maybe executed when the class is being unloaded GC? Because this is a class level. It is more like the application level exit and such. There is a problem at Digital Mars's site. Steve must have meant the module static destructor. Search for Static Construction and Destruction on the module page: http://www.digitalmars.com/d/2.0/module.html (Do not click StaticDestructor at the top of the page. That is linked to the class page.) Ali
Re: Any application shutdown hooks?
On Wed, 25 May 2011 11:35:51 -0400, Matthew Ong on...@yahoo.com wrote: On 5/25/2011 11:13 PM, Steven Schveighoffer wrote: http://www.digitalmars.com/d/2.0/class.html#StaticDestructor -Steve Static Destructor maybe executed when the class is being unloaded GC? Because this is a class level. It is more like the application level exit and such. This is *exactly* what static destructors do. A static destructor gets called on program termination Actually, that description is inaccurate for non-shared static dtors, someone should fix that. That is not really the same as: http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Runtime.html#addShutdownHook%28java.lang.Thread%29 If you want a static dtor that runs on every thread shutdown, use a normal static dtor. If you want one that runs on the entire application shutdown, use a shared static dtor. -Steve
Re: Any application shutdown hooks?
On Wed, 25 May 2011 11:50:16 -0400, Ali Çehreli acehr...@yahoo.com wrote: On 05/25/2011 08:35 AM, Matthew Ong wrote: On 5/25/2011 11:13 PM, Steven Schveighoffer wrote: http://www.digitalmars.com/d/2.0/class.html#StaticDestructor -Steve Static Destructor maybe executed when the class is being unloaded GC? Because this is a class level. It is more like the application level exit and such. There is a problem at Digital Mars's site. Steve must have meant the module static destructor. Search for Static Construction and Destruction on the module page: http://www.digitalmars.com/d/2.0/module.html (Do not click StaticDestructor at the top of the page. That is linked to the class page.) Oh, yeah, that's exactly what I did! hm... Need to file a bug. (filed as http://d.puremagic.com/issues/show_bug.cgi?id=6055 ) Note that class static dtors are exactly the same as module static dtors, they just are inside the class namespace. -Steve
Re: Any application shutdown hooks?
On 5/25/2011 11:52 PM, Steven Schveighoffer wrote: If you want a static dtor that runs on every thread shutdown, use a normal static dtor. If you want one that runs on the entire application shutdown, use a shared static dtor. -Steve Module Destructor: Cool feature that I can consider to use for other purpose. If you want one that runs on the entire application shutdown, use a shared static dtor. It is more like an entire application shutdown event. So I will be placing that at the same module dtor and file as the main(string[] args) using template mixin. That might work. I will test that out. -- Matthew Ong email: on...@yahoo.com
Re: Any application shutdown hooks?
On Wed, 25 May 2011 11:52:14 -0400, Steven Schveighoffer schvei...@yahoo.com wrote: On Wed, 25 May 2011 11:35:51 -0400, Matthew Ong on...@yahoo.com wrote: On 5/25/2011 11:13 PM, Steven Schveighoffer wrote: http://www.digitalmars.com/d/2.0/class.html#StaticDestructor -Steve Static Destructor maybe executed when the class is being unloaded GC? Because this is a class level. It is more like the application level exit and such. This is *exactly* what static destructors do. A static destructor gets called on program termination Actually, that description is inaccurate for non-shared static dtors, someone should fix that. That is not really the same as: http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Runtime.html#addShutdownHook%28java.lang.Thread%29 If you want a static dtor that runs on every thread shutdown, use a normal static dtor. If you want one that runs on the entire application shutdown, use a shared static dtor. I should clarify that when I wrote this, I thought the description was from the module.html file, not the class.html file. Ali pointed out the bug in the web site. So I didn't get why you were talking about classes, sorry :) Class and module static ctor/dtors should be exactly what you are looking for. -Steve
Re: Any application shutdown hooks?
On 5/25/11, Steven Schveighoffer schvei...@yahoo.com wrote: If you want a static dtor that runs on every thread shutdown, use a normal static dtor. If you want one that runs on the entire application shutdown, use a shared static dtor. I saw some commits change a static dtor to a shared static dtor and wondered what was that all about..
Re: Any application shutdown hooks?
On 5/26/2011 12:23 AM, Andrej Mitrovic wrote: On 5/25/11, Steven Schveighofferschvei...@yahoo.com wrote: If you want a static dtor that runs on every thread shutdown, use a normal static dtor. If you want one that runs on the entire application shutdown, use a shared static dtor. I saw some commits change a static dtor to a shared static dtor and wondered what was that all about.. Thanks a lot for the all the comments and instructions shown here. -- Matthew Ong email: on...@yahoo.com
