activity monitors??? about zodb

[jamadden]

Definitely keep it. We make use of it to log load and store counts and record those statistics to statsd and maybe other things I'm forgetting.

We currently have our own base class that all of our monitors inherit from so that we can chain them together:

def register_subscriber(event):
    """
    Subscriber to the :class:`zope.processlifetime.IDatabaseOpenedWithRoot`
    that registers an activity monitor.
    """
    # IDatabaseOpened fires for each database, so if we sub to that we'd do this many times.
    # WithRoot fires only once.
    for database in event.database.databases.values():
        dam = database.getActivityMonitor()
        database.setActivityMonitor(StatsdActivityMonitor(LogActivityMonitor(dam)))

[jamadden]

I gather that at least sometimes some others found it useful too. Although they have perhaps not been maintained 😄 . (And perhaps this is another exmple of existing functionality taking work to discover. )

[jimfulton]

haha zc.zodbactivitylog

[jimfulton]

I guess it should get documented.

[jamadden]

haha zc.zodbactivitylog

Which turns out to be remarkably like our own solution. I honestly don't think I'd come across it until now. Great minds think alike, as they say, or at least, sometimes later lesser minds like mine experience inspiration without knowing it.