connection

问题 I did a little research about new java socket NIO. I am using MINA for building a simulated server which accept connection from many clients(about 1000) and process the data received from them. I also set up the client simulator which creates around 300 client connection and send data to server using thread. And the result is some of the connection is aborted by the server. Code is below try { listener = new NioSocketAcceptor(ioThread); listener.getFilterChain().addLast("codec", new

问题 How can I implement a connection pooling in Java? There is some pattern? I should use some connections and release it. This connection should be closed after a few times. 回答1: You can use some libraries. For JDBC connection pooling check out bonecp, c3p0 or dbcp. If you need a general purpose pooling, see commons Pool, which dbcp is built on. 来源： https://stackoverflow.com/questions/12640608/connection-pooling-pattern

问题 I'm new to socket programming and trying to get back into python. I wanted to write a simple TCP program which will continuously maintain a connection until some end state is reached, in this case "close" is sent by the client. This works fine for the first iteration, but it freezes on the second thing I send and I'm not sure why. Could someone please explain why my program freezes or how better implement this? TCPServer.py from socket import * serverPort = 12000 serverSocket = socket(AF_INET

问题 It's been two days and I've given up on this. I'm unable to connect to my google compute engine running mysql using workbench. I've followed instructions on numerous stackoverflow links to no avail. See below status of everything. Below is executed on the GCE via ssh browser window. lunchbusters_za@lamp-inst:~$ cat /etc/mysql/mysql.conf.d/mysqld.cnf | grep bind bind-address = 0.0.0.0 Note I've also commented out above bind-address. lunchbusters_za@lamp-inst:~$ netstat -an | grep 3306 tcp 0 0

问题 I have finished a program using sql server and visual studio using c# language . I want to put the database on pc and the program that connected to that database on other PCs I'm using this connection string in App.config : <connectionStrings> <add name="MWEConnectionString" connectionString ="integrated security=yes;initial catalog=MWDB;data source=.\sqlexpress"/> </connectionStrings> Should I change server name by pc external ip address? and according to sql server Should I use windows

问题 I have a multi-user PHP web application that can interact with an FTP server via AJAX. The application allows the user to browse an FTP site. Javascript makes an AJAX call which communicates with a server-script that returns a list of files and directories within a given directory. This works fine. However, each time a directory listing is requested, the server must re-establish a connection with the FTP server, which takes a lot of time. I need to persist an FTP connection PHP resource

问题 i cannot for the life of me get postgres connection a remote postgres db. "Error in postgresqlNewConnection(drv, ...) : RS-DBI driver: (could not connect" I have RPostgreSQL installed, i have postgres running in the background, my macbook is up to date 10.12.5 macOS sierra. and still cannot connect drv <- dbDriver("RPostgreSQL") > con <- dbConnect(drv, host=hostName, + port=portName, + dbname=databaseName, + user=userName, + password=passwordName) Error in postgresqlNewConnection(drv, ...) :

问题 I am trying to create a sample Xamarin Android app to connect devices over bluetooth. I get below error when i try to connect the bluetooth socket at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3819/96c7ba6c/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 at Java.Interop.JniEnvironment+InstanceMethods.CallVoidMethod (Java.Interop.JniObjectReference instance, Java.Interop

问题 Traceback: File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py" in get_response 92. response = callback(request, *callback_args, **callback_kwargs) File "/home/ea/ea/hell/life/views.py" in linkedin_auth 274. token = oauth_linkedin.get_unauthorised_request_token() File "/home/ea/ea/hell/life/oauth_linkedin.py" in get_unauthorised_request_token 52. resp = fetch_response(oauth_request, connection) File "/home/ea/ea/hell/life/oauth_linkedin.py" in fetch_response 42.

问题 I have an OLEDB data connection and I am only wanting to import columns A:O into a table. I can import all the data...successfully, but not limit it to just those columns (A:O) I am populating the Connection Properties screen.. Thanks in advance... Provider=Microsoft.ACE.OLEDB.12.0;User ID=Admin;Data Source=FILEPATH;Mode=ReadWrite;Extended Properties="IMEX=1;HDR=NO;string sql=""select * from ['SHEETNAME'$A:$O]""";Jet OLEDB:System database="";Jet OLEDB:Registry Path="";Jet OLEDB:Engine Type=35