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I am trying my best to setup a build server. I went to install and downloaded the latest build tools but as soon as I try to install it shows me this So I though ok maybe it does not support it so I went here requirements If you scroll down to build tools it says it support windows 2012 am I missing something. thanks Only Windows Server 2012 R2 (with Update 2919355): Essentials, Standard, Datacenter is Supported https://docs.microsoft.com/en-us/visualstudio/productinfo/vs2017-system-requirements-vs 来源： https://stackoverflow.com/questions/43919197/visual-studio-2017-build-tools-not-installing

一、ROWLOCK的使用 1、ROWLOCK行级锁确保，在用户取得被更新的行，到该行进行更新，这段时间内不被其它用户所修改。因而行级锁即可保证数据的一致性，又能提高数据操作的并发性。 2、ROWLOCK告诉SQL Server只使用行级锁，ROWLOCK语法可以使用在SELECT,UPDATE和DELETE语句中。 3、例如select语句中 A 连接中执行 SET TRANSACTION ISOLATION LEVEL REPEATABLE READ begin tran select * from tablename with (rowlock,UpdLock) where id = 3 waitfor delay ' 00:00:05 ' commit tran B连接中如果执行 update tablename set colname = ' 10 ' where id = 3 -- 则要等待5秒 update tablename set colname = ' 10 ' where id <> 3 -- 可立即执行 二、SQL Server中使用ROWLOCK需要注意的地方 1、如果你错误地使用在过多行上，数据库并不会聪明到自动将行级锁升级到页面锁，服务器也会因为行级锁的开销而消耗大量的内存和CPU，直至无法响应。 2、select 语句中

I want to send notifications without using Firebase console (I want to make with server side). For this,I am trying to send device token id to web service. I am using Firebase Cloud Messaging in this Android project. How can I do this? public class MyFirebaseInstanceIdService extends FirebaseInstanceIdService{ private static final String TAG = "MyFirebaseIIDService"; @Override public void onTokenRefresh() { String token = FirebaseInstanceId.getInstance().getToken(); Log.d(TAG, "Token: " + token); sendRegistrationToServer(token); } private void sendRegistrationToServer(String token) { // send

I have a web application that runs fine when used by one user, but as more clients start using it, it is unbearably slow. The server side is written in python and uses tornado. I noticed that while the server it's running on has 4 cores, only 1 is being used, so I've started looking at python's multiprocessing. I've seen the basic example from: http://sebastianraschka.com/Articles/2014_multiprocessing_intro.html and the tornado processors from: http://tornado.readthedocs.org/en/latest/_modules/tornado/process.html (which seems a bit more complicated), but I'm still not sure this is what I'm

I need to work Location API for android where first the data is to be stored on Local Sqlite datbase in android itself each 15 minutes and then send it to a server, so that data can be tracked offline too. Any suggestions, code or help is really appreciated ! You, can simply create a background service then implements a location listener. In that location listener, you can set the time interval in the requestLocationUpdate method to ping the GPS at particular time intervals. or you can use timertask to send gps at particular intervals Here is a location manager instance: lm

I have tried the run spring boot jar file using putty. but the problem is after closed the putty session service was stopped. then i tried up the jar file with following command. its working fine . **nohup java -jar /web/server.jar ** You should avoid using nohup as it will just disassociate your terminal and the process. Instead, use the following command to run your process as a service. sudo ln -s /path/to/your-spring-boot-app.jar /etc/init.d/your-spring-boot-app This command creates a symbolic link to your JAR file. Which then, you can run as a service using the command sudo service your