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from .messenger import Messenger
from .context import Context
class Plugin(object):
'''
Abstract base class for commands that process directives.
'''
_directive = None
def __init__(self, context):
self._context = context
self._log = Messenger()
def can_handle(self, directive):
'''
Returns true if the Plugin can handle the directive.
'''
return directive == self._directive
def handle(self, directive, data, dry_run = False):
'''
Executes the directive.
Returns true if the Plugin successfully handled the directive.
When dry_run is True, the plugin will not perform any actions, only
return False when there is nothing to do, True otherwise.
'''
raise NotImplementedError
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