connection

how to connect SPSS with mongodb

半世苍凉 提交于 2019-12-03 21:15:46
I have mongodb where my data is stored. I am using SPSS where I have do some data analysis. Can someone help me in connecting SPSS to mongodb. Thank you. Are you using SPSS Modeler or Statistics? In both cases you can access MongoDB using R. Both Statistics and Modeler have integration with R. So you can just use the R package 'rmongodb' and connect to your MongoDB. Here you have some links: https://docs.compose.io/languages/r.html http://www.r-bloggers.com/r-and-mongodb/ Remember to use R with Statistics you need to install the plugin 'IBM SPSS Statistics - Essentials for R' ftp://public.dhe

Getting a JDBC connection from EclipseLink

笑着哭i 提交于 2019-12-03 20:41:17
问题 using EclipseLink as JPA 2.0 provider, I can obtain a JDBC connection by simply calling Connection con = entityManager.unwrap(Connection.class); But I'm unsure what I'm responsible for. Do I have to close the connection after submitting my queries? Or are I'm not allowed to close the connection, because EclipseLink also uses this connection internally. Or does it not care, because EclipseLink observes my behaviour and closes the connection automatically if I don't do it? 回答1: If you are in

how to determine, if an internet connection is currently available and active on an android device?

孤人 提交于 2019-12-03 20:26:10
i have this android application that requires to load data from a remote server via the internet. this update-functionaliy obviously requires the device to not only be connected to some kind of network, but also to the internet. so: is want to schedule the update-service to some date and when it starts, it should determine whether it actually CAN reach the target server or not. therefore, a simple "is the device connected to wifi?" does not suffice, as the device may be connected to a wireless network that does not offer internet access. something like a PING is required... whats the easiest /

What to do to make the HSQL driver working?

徘徊边缘 提交于 2019-12-03 20:05:19
I'm currently learning some database tricks in Java and I found this nice book I'm reading. At some point, it encourages me to try a manual database connection with the following class: import java.sql.DriverManager; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; public class DemoSelect { public static void main(final String[] arguments) { // Connection parameters String usr = "sa"; String pwd = ""; String driver = "org.hsqldb.jdbcDriver"; String url = "jdbc:hsqldb:hsql://localhost/xdb"; Connection con = null; PreparedStatement pstm = null; ResultSet

Stop LINQ to SQL dbml from updating connection string when I drag tables into the dbml file

陌路散爱 提交于 2019-12-03 19:26:39
问题 Every time I drag a modified table into my dbml, VS2010 wants me to update the connection string even though I have created a data connection with the exact same information. Every time this happens it changes my connection string to 'DataSourceConnectionString' and I have to delete it from 5 different files and replace it with the name of the connection string I was using previously so it doesn't screw up everyone else using the file through source control. Any Ideas? 回答1: I figured out

Standalone Tomcat 6.0.* + 20,000 simultaneous connections

核能气质少年 提交于 2019-12-03 17:28:57
Does anyone know how to configure Tomcat 6.0 as a standalone web server (on Windows XP) that can handle 20,000 simultaneous connections? Please help me. If you configure it to use the HTTP NIO connector and give it enough memory, it must in theory be able to do so. With the normal HTTP connector, the performance will start to slowdown around 1K connections and then drastically drop around 5K simultaneous connections, simply because each connection implicitly uses its own thread. The HTTP NIO connector has enough with a single thread which scales much, much better. Basically all you need to do

Connect multiple databases dynamically in laravel

不想你离开。 提交于 2019-12-03 17:11:35
I'm building an application which requires connecting 2 database. first one is static and another one is dynamic. config/database.php is like 'mysql' => array ( 'driver' => 'mysql', 'host' => '127.0.0.1', 'port' => '3306', 'database' => 'blog', 'username' => 'root', 'password' => '', 'unix_socket' => '', 'charset' => 'utf8mb4', 'collation' => 'utf8mb4_unicode_ci', 'prefix' => '', 'strict' => true, 'engine' => NULL, ), 'business2' => array ( 'driver' => 'mysql', 'host' => '127.0.0.1', 'port' => '3306', 'database' => 'blog2', 'username' => 'root', 'password' => '', 'unix_socket' => '', 'charset'

How can I receive data from URL on iPhone?

岁酱吖の 提交于 2019-12-03 17:06:57
I'm using the code from Apple's Document to do some HTTP communication. I can connect to the URL successfully, but I failed to receive the data from my server. // create the request NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://..."] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; // create the connection with the request // and start loading the data NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection) { // Create the NSMutableData that will hold // the received data //

Insert SQL statements via command line without reopening connection to remote database

痴心易碎 提交于 2019-12-03 16:47:59
问题 I have a large amount of data files to process and to be stored in the remote database. Each line of a data file represents a row in the database, but must be formatted before inserting into the database. My first solution was to process data files by writing bash scripts and produce SQL data files, and then import the dump SQL files into the database. This solution seems to be too slow and as you can see involves an extra step of creating intermediary SQL file. My second solution was to

Connect Websocket with Poco libraries

橙三吉。 提交于 2019-12-03 16:35:02
I am trying to connect to the Echo Test Websocket using the Poco C++ libraries. In order to do so here is my code which should set up the Websocket: HTTPClientSession cs("echo.websocket.org"); HTTPRequest request(HTTPRequest::HTTP_GET, "/ws"); HTTPResponse response; WebSocket* m_psock = new WebSocket(cs, request, response); m_psock->close(); //close immidiately However it does not work: I am getting an error message like this: Poco::Exception: WebSocket Exception: Cannot upgrade to WebSocket connection: Not Found Can anybody help? The 'Not Found' error is the standard HTTP 404 Not Found