restart | 易学教程

Is there a way to stop/re-start ejb 3.1 automatic timer during runtime?

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问题 I'm trying to use a simple automatic EJB schedule/timer. My code goes something like this: @Singleton @Lock(LockType.READ) public class Scheduler { @Schedule(second = "0", minute = "*/20", hour = "*"), private void fetchSomeData() { ... } @Schedule(second = "0", minute = "*/5", hour = "*"), private void cleanThingsUp() { ... } } Is there a way to stop and restart automatic timers during the runtime? Please notice that I don't need to change the timeouts, I only need to stop and start the

How can I tell if the computer has been restarted?

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问题 I once used a command line SMTP mailer that, as a limit of the trial version, allowed you to receive up to 10 emails with it per Windows session. If you rebooted your computer, you could receive 10 more. I thought this kind of shareware crippling was pretty neat, and I'd like to replicate it in my app. I'm just stuck on how to do it. I know how to limit the user's actions, but how can I tell if the computer has been restarted since the application has been last run? The OS is Windows and the

Python restart program

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问题 I made a program that asks you at the end for a restart. I import os and used os.execl(sys.executable, sys.executable, * sys.argv) but nothing happened, why? Here's the code: restart = input("\nDo you want to restart the program? [y/n] > ") if str(restart) == str("y"): os.execl(sys.executable, sys.executable, * sys.argv) # Nothing hapens else: print("\nThe program will be closed...") sys.exit(0) 回答1: import os import sys restart = input("\nDo you want to restart the program? [y/n] > ") if

How to prevent Android to restart application after calling camera intent?

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问题 On low memory device I've got a problem after calling camera intent. When activity result should be received Android restart the whole app. Have anybody faced same problem? Is there any solution? 回答1: I faced the same issue a while ago: Android system stops application when launching Media Intent Apparently there is no solution, so you have to make sure that you save and restore the application state. 回答2: Well i think, the problem could be: Image byte array is too big such that it touches

Nginx 启动/重启脚本笔记

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Nginx本身可以通过 kill - HUP `cat /usr/local/nginx/logs/nginx.pid` 进行平滑重启的，可以通过ps进程查看一下。效果还是挺不错的。这里介绍的是另外一种方式service，适合RHEL/CentOS系列。 kill nginx进程 kill `cat /usr/local/nginx/logs/nginx.pid` 建立 /etc/init.d/nginx 文件 #!/bin/sh # # nginx - this script starts and stops the nginx daemin # # chkconfig: - 85 15 # description: Nginx is an HTTP(S) server, HTTP(S) reverse \ # proxy and IMAP/POP3 proxy server # processname: nginx # config: /usr/local/nginx/conf/nginx.conf # pidfile: /usr/local/nginx/logs/nginx.pid # Source function library. . / etc / rc . d / init . d / functions # Source networking

Program restart self on update

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问题 I checked everywhere so I am hopefully not repeating a question. I want to add a portable update feature to some C code I am writing. The program may not be in any specific location, and I would prefer to keep it to a single binary (No dynamic library loading) Then after the update is complete, I want the program to be able to restart (not a loop, actually reload from the HDD) Is there any way to do this in C on Linux? 回答1: If you know where the program is saved on disk, then you can exec()

Android GPS does not work until restart on new phones

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问题 I have posted about this issue before, and found a few other people who have had the same issue with no solutions found. I am developing an Android app that submits a JSON query to a server with the obtained GPS coordinates and geocoded Zip Code. For brand new users that have never downloaded the app, GPS does not work whatsoever. It is not until rebooting the phone that GPS will work. After installing the app and then rebooting, the GPS will work every time without problem, even if they

How to protect application pools from session serialization exceptions?

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问题 We're using an Out-of-Process Session Provider ( ScaleOut ) for an ASP.NET application and we've noticed that when an object that's not correctly setup for de-serialization inadvertently makes its way into session it will eventually cause the entire process to terminate . Reproducing and handling this scenario is where it gets even more interesting. The exception that terminates the process is raised in AnyStaObjectsInSessionState whose implementation is pretty straightforward: internal

Detect if user interacts with phone?

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问题 I need to detect when user interacts with the phone and restart my app after 60 seconds from last user's touch on screen. Is is possible to do something like that? It must work as the screenserver for PC. 回答1: Is is possible to do something like that? Only if your activity is in the foreground, in which case you can keep track of touch events. You cannot find out about touch events happening elsewhere in the system. 回答2: ACTION_USER_PRESENT is a broadcast action, so you should be able to

How to restart a JFrame when creating a multiple level game?

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问题 I have a one level computer game that I created , and I want to add another level . Here is the Main : public class Main extends JDialog { private static final long serialVersionUID = 1L; protected static TimerThread timerThread; static JStatusBar statusBar = new JStatusBar(); private static JFrame frame; private static final int FRAME_LOCATION_X = 300; private static final int FRAME_LOCATION_Y = 50; private static final int FRAME_SIZE_X = 850; // animator's target frames per second private