connection

问题 I have a task to write application, that will connect to not-mobile-phone device by blue tooth and this device will send some data every second(some statistics) and device shouldn't disconnect after sanding one batch of data. How can I do this? 回答1: If you open up a bluetooth socket connection, it will stay open as long as you hold the reference to it and neither end closes. A simple example is the Bluetooth Chat example. It shows how to connect two phones, but it also shows how to maintain

问题 I have written a wlst script to create multiple connection factories. Code is as below : def createJMSConnFac(systemModuleName,ConnectionFactoryJNDIName,connectionFactoryName): cd('/JMSSystemResources/'+systemModuleName+'/JMSResource/'+systemModuleName) cmo.createConnectionFactory(connectionFactoryName) cd('/JMSSystemResources/'+systemModuleName+'/JMSResource/'+systemModuleName+'/ConnectionFactories/'+connectionFactoryName) cmo.setJNDIName(ConnectionFactoryJNDIName) print "Created a

问题 I'm creating a website thanks to Symfony2 with FOSUserBundle. I'm triyng to deny multiple connections on the same login (but from different computers for example). I've 2 solutions : Create an event listner on authentification but I didn't manage to make it. (even with the cookbook). override the login_check method but my FOSUserBundle doesn't work if I do it. Do you have any better options? Or any solutions? 回答1: Got it finaly. There is just one last update to make to solve it all. You need

问题 I'm writing an application for android. My problem is that I want it to force the connection in GPRS and not use wi fi. I have a solution like below, but this causes the crash of the application at start. ConnectivityManager CM = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE); CM.setNetworkPreference(ConnectivityManager.TYPE_MOBILE); I also added the below setting lines into manifest file. uses-permission android:name="android.permission.WRITE_SETTINGS" uses

问题 I can't find an answer to this anywhere. Maybe its really simple I have my mysql PDO connection like this: try{ $DBH = new PDO("mysql:host=$db_hostname;dbname=$db_database", $db_username, $db_password); $DBH->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION ); } catch (PDOException $e){ echo $e->getMessage(); exit; } i want to just test if the connection worked, ie. if the password, username, databasename & hostname were spelled correctly. the try, throw just seems to pick up

问题 I am trying to import tables to my MATLAB workspace and it keeps throwing me an error, "Undefined function or method 'fetch' for input arguments of type 'struct'. " This is my code that i am trying to execute: dyn_conformer = exec(conn, 'SELECT * FROM dyn_conformer'); rs =fetch(dyn_conformer); When i opened the object in the workspace, it stated that it was "Invalid or closed connection" . However, previously i manage to import other tables and it seemed to execute perfectly (they are stored

问题 we use Weblogic server and always set autoCommit to 'false' when getting Connection to Oracle 10g. I want to know if there is a setting in Weblogic wherein it will automatically Commit transactions if a Commit or Rollback is not explicitly called from within application code. I heard similar setting exists in Websphere. 回答1: It looks like you are not using either Container-managed or Bean-managed transactions. Or, for that matter, you are merely retrieving a connection from a DataSource and

问题 I can't connect to an Oracle schema through a asmx web service instead of I can through a console application [x86]. The code: var conn = new OracleConnection("Data Source=xe;User ID=mySchema;Password=myPass"); The exception: ORA-12154: TNS:could not resolve the connect identifier specified The environment: Windows 7 x64 - VS 2008. Any idea? kindly ask me for any extra information Thanks in advance. 回答1: OCI, the Oracle client layer on which ODP (or the native Oracle client layer) is based

问题 The class MapperExtension has some methods, and before_insert , before_update , ... all have a parameter connection . def before_insert(self, mapper, connection, instance): I've read the documents of MapperExtension , but found nothing about this connection . What is it? And how to use it? 回答1: It's an instance of Connection class. Recent versions of SQLAlchemy distribution have examples directory, see examples/nested_sets/nested_sets.py to get an idea on how to use it in mapper extension. 来源

问题 I'm running MySQL 5.6 (64-bit) on Windows 7. I'm testing a DB recently upgraded from MySQL 5.0 on 32-bit Windows 7. (I also copied my.ini, with a few changes) I'm finding that it takes a very long time to establish a connection (on the order of 1 second). As an example, I created a very simple SQL script: select 1 as n; I then ran this in a batch file 10 times which took 10 seconds to complete: mysql -h localhost -u root -D myschema 0< myscript.sql (Yes, there is no password here, this is a