I learned that calling an Object's wait() method will release the object monitor, if present. But I have some questions regarding calling notify() on this object by another thread: (when) will the waiting thread wake up, if another (a 3rd) thread owns the object monitor in the meanwhile? will the waiting thread wake up, if a 3rd threa...
I've written a php file that changes a MySql table entry when it receives an http post. I would also like the php file to send out a notification to the table entry's owner. This idea is similar to a chat room or instant messengering program. I've looked at php chat scripts but I really need something that has a very simple interface tha...
I'm trying to write a program with 2 classes, a controller and a class that does a lot of computation. The controller creates a couple instances of the other class, then tells them all to start their calculations (in parallel). They each return when they are finished, and the controller resumes, and then, some time later, the controller ...
I've got a python program which runs via crontab and that works perfectly. However, I decided to add the ability to notify me of what it's doing, and suddenly it's failing. It runs from the command line, however, running it as a crontab program causes it to fail libnotify-Message: Unable to get session bus: /bin/dbus-launch terminated a...
some comments here have confused me! I thought I knew this and god knows I've written a ton of MT code, but its been a while and so.... FWIK notify/notifyall notify: one thread is selected from the waitset and moved to the entryset to acquire monitor lock notifyall : all threads are "notified" - are they all moved to the entryset ? ...
Specifically, can somebody tell me what is wrong with this piece of code. It should start the threads, so should print "Entering thread.." 5 times and then wait until notifyAll() is called. But, it randomly prints "Entering.." and "Done.." and still keeps waiting on others. public class ThreadTest implements Runnable { private int n...
Having this wait declaration: public final native void wait(long timeout) throws InterruptedException; It could exit by InterruptedException, or by timeout, or because Notify/NotifyAll method was called in another thread, Exception is easy to catch but... There is any way to know if the exits cause was timeout or notify? EDIT: This...
I have a main game thread but when the target score is achieved I have an activity that is launched called StageCleared which basically displays the stats to the user of their performance and then they can press a continue button to carry on with the game. This should switch focus back to the running thread that should continue execution...
Hi, If the main thread quits before child finishes its work, and child tries to notify, what will happen? Thanks ...
Alternatively, I could use something like viewWillAppear, only switching tabs doesn't call viewWillAppear - IF I can access selectedItem or selectedIndex reliably from there. The goal is to re-use a similar table view, with 3 tabs filling the table with differently filtered data. I tried overriding didSelect and using the app delegate ...
Hi, I would like to develop a desktop application with Java (I've got very basic knowledge of Java). It'll run on the client's computer and will pull information from the server hosted in the internet. I can set a schedule task to connect to the server every 2minutes and check for any update/changes but I don't think it's a very good id...
For example. I have a database upgrade script for adding a column to a database table. It looks a little like this: IF NOT Exists(SELECT * FROM SysColumns sc, SysObjects so WHERE sc.Name = 'dealer_number' AND so.Name = 'collector' AND so.Type= 'U' AND so.id = sc.id) BEGIN -- SQ...
I Have a VS2008 app that needs to display two notifyIcons in the System tray. One is the main application icon, which allows quick access to the GUI. The second is a "new message" icon, which is displayed when a new message arrives, and hidden when the user double-clicks on it, much like the new Outlook mail message icon. The problem i...
I've been using ReadDirectoryChangesW to monitor a particular portion of the file system. It rather nicely provides a partial pathname to the file or directory which changed along with a clue about the nature of the change. This may have spoiled me. I also need to monitor a particular portion of the registry, but it looks as if RegNotif...
I've read many docs about thread states, some of them tells that there is two different states: blocked (before synchronized) and wait (if calls wait), some others are telling that there is only one state: wait. Moreover, some docs telling that you should call notify() for every wait() and if you don't then threads waiting() will never b...
I have 3 threads (A, B, C) that i just can't make them work how i want them to. ALL these 3 threads share a reference to the same object - K. What i'm trying to do, is to start all 3 up, then at some point in time when thread A arrives in a certain state, pause threads B and C, until A executes some method work() and when work finishes, ...
I have three pages: The first inserts some info into the DB. The second inserts some new info into the DB ,when it is requested The third shows this information How to notify the third page when the second updates the info? ...