connection

问题 I'm trying to create a scenario on my Macbook with Mojave in Anylogic, which is part of agent-based simulation with many different tools. My idea is to connect Anylogic via Java Interface to Eclipse. The main problem is, that Anylogic somehow does not respond. I have tried many different codes with sockets, but could not find one, which worked for Anylogic. I'm using the free version of Anylogic and created a Java Interface under my Main Project. To run the Java Interface I press right-click

问题 Essentially, I am trying to print out information in JSON so that I can communicate with my app, but I cannot connect to the MySQL database from a php script for some odd reason. What could it be that causes the error: Warning: mysql_connect() [function.mysql-connect]: Lost connection to MySQL server during query in /srv/disk11/1158855/www/(myphpwebsite)/lib.php on line 13 Could not connect: Lost connection to MySQL server during query. Also, line 13 is indicating the line in lib.php: mysql

问题 I used static scaffolding to create CRUD-methods for my Test domain class. When using the created TestController only I had no problems whatsoever saving new Test objects. However, I wanted to extend the functionality and implemented a corresponding TestService class. Doing so I now always get an error on saving a Test object: Connection is read-only. Queries leading to data modification are not allowed And here it started to malfunction. Following the code of TestService . If I understood it

问题 Following advice, I'm planning to log errors from several time critical python processes (clients) to a single logging process (server). SysLogHandler seems to be the correct choice as it uses UDP (I rather be system-agnostic) and does not wait for any confirmation, and as I'm using localhost so there should practically be no loss of logs. However, I'm unclear as to how I should implement the server side on two accounts: Should I simply open a multiprocessing.connection and conn.recv() the

问题 I'm trying to set up my cordova app to use socket.io websocket connection but I can't get it to connect when I run in debug mode. Everything I've read tells me this should work, what am I doing wrong? Server Side var http = require('http'); var server = http.createServer(); var io = require('socket.io')(server); server.listen(5022, function () { console.log('listening on *:5022'); }); io.sockets.on('connection', function (socket) { console.log('socket connected'); socket.on('disconnect',

问题 I wrote this code. ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity != null) { NetworkInfo[] info = connectivity.getAllNetworkInfo(); if (info != null) { for (int i = 0; i < info.length; i++) { if (info[i].getState() == NetworkInfo.State.CONNECTED) {} But getAllNetworkInfo() is deprecated. Please help. Thank you. 回答1: as the docs say: getAllNetworkInfo() This method was deprecated in API level 23. This method

问题 I am trying to figure out the best structure for connection pools so that I can access the connection pool from any servlet and establish a connection to my database. I have been following some tutorials in setting up and configuring the datasource and connection pool and they all have them initialized and accessed in classes that extend HttpServlet. So it looks something like this: public class DatabaseConnector extends HttpServlet { private static final long serialVersionUID = 1L; private

问题 I am currently trying to make a socket connection from my client (iOS simulator) to my host (Genymotion simulator). I am having a hard time finding the correct IP address and configuring the right settings for VirtualBox to get this to work. How can I find the proper IP address and port for iOS to connect to when I host the server on the Genymotion server? 回答1: By default Genymotion devices use a NAT connection to connect to internet. It means they are not visible from your local network. You

问题 I'm using processing and I'm reading inputs from Arduino with a serial port but connection drop may occur, in this case how to I reopen this connection? 回答1: You can catch RuntimeExceptions thrown by Serial.java, which generally indicate the serial port is no longer available. Within that catch block, then, you can start polling the serial port; once it allows you to reinstantiate your Serial instance, the port is again available (e.g. the USB cable is plugged back in) and you're back in the

问题 I have two servers setup on Amazon AWS. One server is running PHP and the other has MySQL. I can connect to the MySQL database through my terminal and MySQL Query Browser. I am trying to get a connection between the PHP and MySQL servers. Here is the PHP Code that I am using (works for "localhost" databases) $dbbase = 'mydb'; $dbuser = 'myuser'; // Your MySQL username $dbpass = 'mypassword'; // ...and password $dbhost = 'localhost:3306'; // Internal IP for MYSQL Server // connect to database