Package Gnumed :: Package pycommon :: Module gmPG :: Class ConnectionPool |
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# Class ConnectionPool

source code

maintains a static dictionary of available database connections

Instance Methods
__init__(self, login=None, encoding=None) parameter login is of type gmLoginInfo.LoginInfo | source code
__del__(self) | source code
GetConnection(self, service="default", readonly=1, encoding=None, extra_verbose=None) Get a connection. | source code
ReleaseConnection(self, service) decrease reference counter of active connection | source code
Connected(self) | source code
get_connection_for_user(self, user=None, password=None, service="default", encoding=None, extra_verbose=None) Get a connection for a given user. | source code
Listen(self, service, signal, callback) Listen to 'signal' from backend in an asynchronous thread. | source code
Unlisten(self, service, signal, callback) | source code
StopListener(self, service) | source code
StopListeners(self) | source code
GetAvailableServices(self) list all distributed services available on this system (according to configuration database) | source code
GetLoginInfoFor(self, service, login=None) return login information for a particular service | source code

Method Details

### get_connection_for_user(self, user=None, password=None, service="default", encoding=None, extra_verbose=None) | source code
Get a connection for a given user. This will return a connection just as GetConnection() would except that the user to be used for authentication can be specified. All the other parameters are going to be the same, IOW it will connect to the same server, port and database as any other connection obtained through this broker. You will have to specify the password, of course, if it is needed for PostgreSQL authentication. This will always return a read-write connection.

### Listen(self, service, signal, callback) | source code
Listen to 'signal' from backend in an asynchronous thread. If 'signal' is received from database 'service', activate the 'callback' function