background-process

问题 I am trying to make a bash script to start a jar file and do it in the background. For that reason I'm using nohup . Right now I can capture the pid of the java process but I also need to be able to execute a command when the process finishes. This is how I started nohup java -jar jarfile.jar & echo $! > conf/pid I also know from this answer that using ; will make a command execute after the first one finishes. nohup java -jar jarfile.jar; echo "done" echo "done" is just an example. My

问题 I'm making an alarm clock-like app. The user should be notified with a vibration and a sound every 10-60 seconds over a period of about 30 minutes. What is the best approach for this? It's easy enough doing it in the foreground, but how can i continue to run scheduled code in the background? I could use local notifications, but the user doesn't receive them when in "do not disturb" mode. 回答1: You should review the documentation about background execution: Background Execution and Multitasking

问题 NOTE: This app I am working on is completely for my own usage and will not be on app store so please don't give answers referring that. I want my app to do some process in background or after termination (double tap the home button and swipe the app from applications multitask) every few minutes. The process is very very light and quick so it won't drain the battery. This process shouldn't require internet connection. I have seen some answers here like and I will explain what are the problems

问题 We are developing C++ apps (lots of MFC) with Visual Studio 2005 on Windows. From time to time it happens that our nightly builds and/or unit tests hang because some part of some app or helper tool opens a message box in a corner case that is hit by the build. Since the automated stuff is run (by a Windows Service) without any desktop session attached, obviously no-one can confirm - or even read - the GUI messages. Is there any way to have Windows prevent apps from opening dialogs? Or maybe a

问题 I working on swift for Ios App. I want to phone user connect specific wifi. So i open iphone wifi settings by NSURL like this. After then my app go to background and i control ssid every 500ms in background by background task like this. When phone connect the specific wifi i can see this status and i stop background task. But i cant comes my app to foreground. I tried open my app use NSURL metod like this video (i add custom url my info.plist and add application function in my appdelagate)

问题 I have a script that creates thumbnails of larger images and it works fine, the problem is that it is placed at the beginning of the page where both images are viewed and to my understanding would run every time someone visits the page. This doesn't seem very performant. I would rather the script have its own page and somehow detected when more large images had been added to the directory it scans and go to work then. How would i go about setting this up or improving it in someway? found this

问题 Whenever I exit the app while I have an alarm set and the alarm goes off while the app is "DEAD" I get an Exception while trying to update a field in Firestore. The code works when the app is running in the foreground so I really have no clue of what is going on. Either way, here is the code for 2 functions which get called from the JobIntentService which is in turn created from a BroadcastReceiver: private val firestoreInstance: FirebaseFirestore by lazy { FirebaseFirestore.getInstance() }

问题 I have a function that I want to run in the app background mode and be executed at least every minute to check for wifi connection and to make decisions. I am using locationManager delegate so I can run my NSTimer in the background. However the location manager is consuming a lot of battery power. This app is not for apple release. However I am looking for more efficient settings for location manager so it will not be that power hungry or maybe any other good ideas?. The current settings that

问题 I have a background process running, it can be seen in task Manager while its running. I need to check from my database, whether the process is running or not I have tried the following query select * from sys.dm_os_threads select * FROM sys.dm_os_tasks But it doesnt show me all process running on the system 回答1: I have a background process running, it can be seen in task Manager while its running. I need to check from my database, whether the process is running or not I hope you are talking

问题 I have an issue using subprocess.call when calling scripts which in turn run background processes. I am calling a bash script from a python script. python 2.7.3. #!/bin/python from subprocess import call . . call(["run_exp",file_name]) print "exp complete!" . . run_exp is a bash script which runs a process in the background. #!/bin/bash . . run_task auto_output 2>/dev/null & . . echo "run_exp finished!" The run task command is another bash script. This is always completed by the time run_exp