scheduler

Can I set a timer on a Java Swing JDialog box to close after a number of milliseconds

由 爱⌒轻易说出口 提交于 2019-11-27 02:47:58
问题 Hi is it possible to create a Java Swing JDialog box (or an alternative Swing object type), that I can use to alert the user of a certain event and then automatically close the dialog after a delay; without the user having to close the dialog? 回答1: This solution is based on oxbow_lakes', but it uses a javax.swing.Timer, which is intended for this type of thing. It always executes its code on the event dispatch thread. This is important to avoid subtle but nasty bugs import javax.swing.*;

How to check whether Quartz cron job is running?

由 放肆的年华 提交于 2019-11-27 02:43:35
问题 How to check if scheduled Quartz cron job is running or not? Is there any API to do the checking? 回答1: scheduler.getCurrentlyExecutingJobs() should work in most case. But remember not to use it in Job class, for it use ExecutingJobsManager(a JobListener) to put the running job to a HashMap, which run before the job class, so use this method to check job is running will definitely return true. One simple approach is to check that fire times are different: public static boolean isJobRunning

Request admin privileges for Java app on Windows Vista

由 只愿长相守 提交于 2019-11-27 01:57:54
问题 When I try to create a new task in the task scheduler via the Java ProcessBuilder class I get an access denied error an Windows Vista. On XP it works just fine. When I use the "Run as adminstrator" option it runs on Vista as well.. However this is a additional step requeried an the users might not know about this. When the user just double clicks on the app icon it will fail with access denied. My question is how can I force a java app to reuest admin privileges right after startup? 回答1: I'm

Java scheduler which is completely independent of system time changes

由 喜你入骨 提交于 2019-11-27 01:56:28
问题 Was using Java Timer, Then switched to ScheduledExecutorService, but my problem is not fixed. As Tasks scheduled before system time change (through ntpd) are not executed on delay specified. Have no logs for same as nothing happens :(. using jre 1.6.0_26 64 bit in my target on 64 bit linux. Update: ScheduledExecutorService works fine on Windows. Problem is only on 64 bit Linux based system running 64 bit JVM. It works fine on 64 bit linux running 32 bit JVM...strange. Have not found any

Mesos DRF算法的论文阅读

由 大憨熊 提交于 2019-11-27 00:10:20
<p>dominant resource fairness算法是Mesos的灵魂，不同于hadoop基于slot-based实现的fair scheduler和capacity scheduler，学习阅读了一下论文“Dominant Resource Fairness: Fair Allocation of Multiple Resource Types”，顺便简单地翻译了一下。以下是论文翻译地正文。</p> <p>------------------------------------------------------------------------------</p> <p>我们考虑在一个包括多种资源类型的系统的公平资源分配问题，其中不同用户对资源有不同的需求。为了解决这个问题，我们提出了Dominant Resource Fairness(DRF)，一种针对不同资源类型的max-min fairness。首先DRF激励用户去共享资源，如果资源是在用户之间被平均地切分，会保证没有用户会拿到更多资源。其次，DRF 是strategy-proof，用户不能通过欺骗来获取更多地资源分配。然后，RDF是envy-free（非嫉妒），没有一个用户会与其他用户交换资源分配。最后，RDF分配是Pareto efficient

How can I see which CPU core a thread is running in?

由 隐身守侯 提交于 2019-11-27 00:02:18
问题 In Linux, supposing a thread's pid is [pid], from the directory /proc/[pid] we can get many useful information. For example, these proc files, /proc/[pid]/status,/proc/[pid]/stat and /proc/[pid]/schedstat are all useful. But how can I get the CPU core number that a thread is running in? If a thread is in sleep state, how can I know which core it will run after it is scheduled again? BTW, is there a way to dump the process(thread) list of running and sleeping tasks for each CPU core? 回答1: The

How to run a thread repeatedly after some interval

由 匆匆过客 提交于 2019-11-26 23:11:25
问题 I want to run a thread (Which does some time consuming task in background and does NOT update UI) it just downloads some files form the internet and it is independent from the UI. I want to run this thread repeatedly after some time interval. How can i do this, I have thread something like below: boolean mResult =false; void onCreate() { DownloadThread mDownloadThread = new DownloadThread(); mDownloadThread.start(); } class DownloadThread extends Thread implements Runnable { public void run()

Passing arguments to oracle stored procedure through scheduler job

由 坚强是说给别人听的谎言 提交于 2019-11-26 21:52:32
问题 I have a stored procedure which is being called from a dbms job. i.e. DBMS_SCHEDULER.RUN_JOB ('Procedure_JB', FALSE); A java code stored procedure, which after doing some stuff, kicks off Procedure_JB asynchronously. And then this Procedure_JB calls Procedure_PRogram and then the program would call the stored procedure. How can i pass arguments to my stored procedure? The arguments which i have to pass to the job are from java. 回答1: Define your job Procedure_JB to accept arguments. Then use

Testing @Scheduled in spring

由 試著忘記壹切 提交于 2019-11-26 19:14:35
问题 Spring offers the possibility to schedule and execute tasks at specific intervals using annotations, e.g. @Scheduled Is there a convenient way to unit test this behavior? Of course I could call the method of the bean myself, but I want to make sure I don't run into problems like multiple executions due to misconfiguration and so on. Other frameworks offer the possibility to fast forward the time yourself. One example is Activiti where you can call org.activiti.engine.impl.util.ClockUtil

GWT: Timer and Scheduler Classes

由 巧了我就是萌 提交于 2019-11-26 19:01:19
I have read this page over several times, and am just not seeing some of the inherent differences between GWT's Timer and Scheduler classes. I'm looking for the use cases and applicability of each of the following: Timer , Timer::schedule and Timer::scheduleRepeating Scheduler::scheduleDeferred Scheduler::scheduleIncremental IncrementalCommand DeferredCommand These all appear to be doing the same thing, more or less, and it feels like you can accomplish the same objectives with all of them. Is this just GWT's way a providing multiple ways of doing the same thing? If not, please help me
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