| |
| |
| |
|
|
| from mole.event import Event |
| from mole.action import Action, ActionSyntaxError |
| from mole.helper.timeformat import Timespan |
|
|
| class ActionTransaction(Action): |
| """This action merge events in a transaction defined by field or another |
| expresion.""" |
|
|
| REQUIRE_PARSER = True |
|
|
| def __init__(self, fields=[], startswith=[""], endswith=[""], |
| maxevents=[10000], maxspan=[None]): |
| """Create a new transaction action. |
| |
| :param `fields`: a :class:`list` which contains the fields to make |
| the transaction. |
| :param `startsWith`: a string to be used to find the beginning of |
| the transaction. |
| :param `endsWith`: a string to be used to find the end of the |
| transaction. |
| """ |
| self.fields = fields |
| self.startswith = startswith[0] |
| self.endswith = endswith[0] |
| self.maxspan = Timespan(maxspan[0]) if maxspan[0] else None |
| self.maxevents = int(maxevents[0]) |
|
|
| if not self.fields: |
| raise ActionSyntaxError("No fields provided") |
|
|
|
|
| def __call__(self, pipeline): |
| ret = [] |
| for event in pipeline: |
| if len(self.fields) == len(filter(lambda x:x in event, self.fields)): |
| if len(ret) >= self.maxevents: |
| yield Event.merge(ret) |
| ret = [ event ] |
| elif self.startswith and event._raw.startswith(self.startswith): |
| yield Event.merge(ret) |
| ret = [ event ] |
| elif self.endswith and event._raw.endswith(self.endswith): |
| ret.append(event) |
| yield Event.merge(ret) |
| elif self.maxspan and len(ret) and \ |
| (event.time - ret[0].time) > self.maxspan.seconds: |
| yield Event.merge(ret) |
| ret = [ event ] |
| else: |
| ret.append(event) |
|
|
| if ret: |
| yield Event.merge(ret) |
|
|
|
|
