buildbot.process.mtrlogobserver.EqConnectionPool

This class works the same way as twisted.enterprise.adbapi.ConnectionPool. But it adds the ability to compare connection pools for equality (by comparing the arguments passed to the constructor).

This is useful when passing the ConnectionPool to a BuildStep, as otherwise Buildbot will consider the buildstep (and hence the containing buildfactory) to have changed every time the configuration is reloaded.

It also sets some defaults differently from adbapi.ConnectionPool that are more suitable for use in MTR.

init(self, *args, **kwargs)
(Constructor)

source code

Create a new ConnectionPool.

Any positional or keyword arguments other than those documented here are passed to the DB-API object when connecting. Use these arguments to pass database names, usernames, passwords, etc.

Parameters:

dbapiName - an import string to use to obtain a DB-API compatible module (e.g. 'pyPgSQL.PgSQL')
cp_min - the minimum number of connections in pool (default 3)
cp_max - the maximum number of connections in pool (default 5)
cp_noisy - generate informational log messages during operation (default False)
cp_openfun - a callback invoked after every connect() on the underlying DB-API object. The callback is passed a new DB-API connection object. This callback can setup per-connection state such as charset, timezone, etc.
cp_reconnect - detect connections which have failed and reconnect (default False). Failed connections may result in ConnectionLost exceptions, which indicate the query may need to be re-sent.
cp_good_sql - an sql query which should always succeed and change no state (default 'select 1')
cp_reactor - use this reactor instead of the global reactor (added in Twisted 10.2).

Overrides: twisted.enterprise.adbapi.ConnectionPool.__init__

(inherited documentation)

Class Variables
Inherited from `twisted.enterprise.adbapi.ConnectionPool`: `CP_ARGS`, `good_sql`, `max`, `min`, `name`, `noisy`, `openfun`, `reconnect`, `running`

Instance Variables
Inherited from `twisted.enterprise.adbapi.ConnectionPool`: `connectionFactory`, `shutdownID`, `transactionFactory`

Class EqConnectionPool

__init__(self, *args, **kwargs) (Constructor)

init(self, *args, **kwargs)
(Constructor)