pyspider.libs.CounterManager.__init__() - Code Metrics - Inspection of "clear project's counter when delete project" - binux/pyspider - Measure and Improve Code Quality continuously with Scrutinizer

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pyspider.libs.CounterManager.init() A

↳ Parent: pyspider.libs.CounterManager

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#!/usr/bin/env python
# -*- encoding: utf-8 -*-
# vim: set et sw=4 ts=4 sts=4 ff=unix fenc=utf8:
# Author: Binux<[email protected]>
#         http://binux.me
# Created on 2012-11-14 17:09:50

from __future__ import unicode_literals, division, absolute_import

import time
import logging
from collections import deque
try:
    from UserDict import DictMixin
except ImportError:
    from collections import Mapping as DictMixin

import six
from six import iteritems
from six.moves import cPickle


class BaseCounter(object):

    def __init__(self):
        raise NotImplementedError

    def event(self, value=1):
        """Fire a event."""
        raise NotImplementedError

    def value(self, value):
        """Set counter value."""
        raise NotImplementedError

    @property
    def avg(self):
        """Get average value"""
        raise NotImplementedError

    @property
    def sum(self):
        """Get sum of counter"""
        raise NotImplementedError

    def empty(self):
        """Clear counter"""
        raise NotImplementedError


class TotalCounter(BaseCounter):
    """Total counter"""

    def __init__(self):
        self.cnt = 0

    def event(self, value=1):
        self.cnt += value

    def value(self, value):
        self.cnt = value

    @property
    def avg(self):
        return self.cnt

    @property
    def sum(self):
        return self.cnt

    def empty(self):
        return self.cnt == 0


class AverageWindowCounter(BaseCounter):
    """
    Record last N(window) value
    """

    def __init__(self, window_size=300):
        self.window_size = window_size
        self.values = deque(maxlen=window_size)

    def event(self, value=1):
        self.values.append(value)

    value = event

    @property
    def avg(self):
        return self.sum / len(self.values)

    @property
    def sum(self):
        return sum(self.values)

    def empty(self):
        if not self.values:
            return True


class TimebaseAverageEventCounter(BaseCounter):
    """
    Record last window_size * window_interval seconds event.

    records will trim ever window_interval seconds
    """

    def __init__(self, window_size=30, window_interval=10):
        self.max_window_size = window_size
        self.window_size = 0
        self.window_interval = window_interval
        self.values = deque(maxlen=window_size)
        self.events = deque(maxlen=window_size)
        self.times = deque(maxlen=window_size)

        self.cache_value = 0
        self.cache_event = 0
        self.cache_start = None
        self._first_data_time = None

    def event(self, value=1):
        now = time.time()
        if self._first_data_time is None:
            self._first_data_time = now

        if self.cache_start is None:
            self.cache_value = value
            self.cache_event = 1
            self.cache_start = now
        elif now - self.cache_start > self.window_interval:
            self.values.append(self.cache_value)
            self.events.append(self.cache_event)
            self.times.append(self.cache_start)
            self.on_append(self.cache_value, self.cache_start)
            self.cache_value = value
            self.cache_event = 1
            self.cache_start = now
        else:
            self.cache_value += value
            self.cache_event += 1
        return self

    def value(self, value):
        self.cache_value = value

    def _trim_window(self):
        now = time.time()
        if self.cache_start and now - self.cache_start > self.window_interval:
            self.values.append(self.cache_value)
            self.events.append(self.cache_event)
            self.times.append(self.cache_start)
            self.on_append(self.cache_value, self.cache_start)
            self.cache_value = 0
            self.cache_start = None

        if self.window_size != self.max_window_size and self._first_data_time is not None:
            time_passed = now - self._first_data_time
            self.window_size = min(self.max_window_size, time_passed / self.window_interval)
        window_limit = now - self.window_size * self.window_interval
        while self.times and self.times[0] < window_limit:
            self.times.popleft()
            self.events.popleft()
            self.values.popleft()

    @property
    def avg(self):
        events = (sum(self.events) + self.cache_event)
        if not events:
            return 0
        return float(self.sum) / events

    @property
    def sum(self):
        self._trim_window()
        return sum(self.values) + self.cache_value

    def empty(self):
        self._trim_window()
        if not self.values and not self.cache_start:
            return True

    def on_append(self, value, time):
        pass


class TimebaseAverageWindowCounter(BaseCounter):
    """
    Record last window_size * window_interval seconds values.

    records will trim ever window_interval seconds
    """

    def __init__(self, window_size=30, window_interval=10):
        self.max_window_size = window_size
        self.window_size = 0
        self.window_interval = window_interval
        self.values = deque(maxlen=window_size)
        self.times = deque(maxlen=window_size)

        self.cache_value = 0
        self.cache_start = None
        self._first_data_time = None

    def event(self, value=1):
        now = time.time()
        if self._first_data_time is None:
            self._first_data_time = now

        if self.cache_start is None:
            self.cache_value = value
            self.cache_start = now
        elif now - self.cache_start > self.window_interval:
            self.values.append(self.cache_value)
            self.times.append(self.cache_start)
            self.on_append(self.cache_value, self.cache_start)
            self.cache_value = value
            self.cache_start = now
        else:
            self.cache_value += value
        return self

    def value(self, value):
        self.cache_value = value

    def _trim_window(self):
        now = time.time()
        if self.cache_start and now - self.cache_start > self.window_interval:
            self.values.append(self.cache_value)
            self.times.append(self.cache_start)
            self.on_append(self.cache_value, self.cache_start)
            self.cache_value = 0
            self.cache_start = None

        if self.window_size != self.max_window_size and self._first_data_time is not None:
            time_passed = now - self._first_data_time
            self.window_size = min(self.max_window_size, time_passed / self.window_interval)
        window_limit = now - self.window_size * self.window_interval
        while self.times and self.times[0] < window_limit:
            self.times.popleft()
            self.values.popleft()

    @property
    def avg(self):
        sum = float(self.sum)
        if not self.window_size:
            return 0
        return sum / self.window_size / self.window_interval

    @property
    def sum(self):
        self._trim_window()
        return sum(self.values) + self.cache_value

    def empty(self):
        self._trim_window()
        if not self.values and not self.cache_start:
            return True

    def on_append(self, value, time):
        pass


class CounterValue(DictMixin):
    """
    A dict like value item for CounterManager.
    """

    def __init__(self, manager, keys):
        self.manager = manager
        self._keys = keys

    def __getitem__(self, key):
        if key == '__value__':
            key = self._keys
            return self.manager.counters[key]
        else:
            key = self._keys + (key, )

        available_keys = []
        for _key in self.manager.counters:
            if _key[:len(key)] == key:
                available_keys.append(_key)

        if len(available_keys) == 0:
            raise KeyError
        elif len(available_keys) == 1:
            if available_keys[0] == key:
                return self.manager.counters[key]
            else:
                return CounterValue(self.manager, key)
        else:
            return CounterValue(self.manager, key)

    def __len__(self):
        return len(self.keys())

    def __iter__(self):
        return iter(self.keys())

    def __contains__(self, key):
        return key in self.keys()

    def keys(self):
        result = set()
        for key in self.manager.counters:
            if key[:len(self._keys)] == self._keys:
                key = key[len(self._keys):]
                result.add(key[0] if key else '__value__')
        return result

    def to_dict(self, get_value=None):
        """Dump counters as a dict"""
        result = {}
        for key, value in iteritems(self):
            if isinstance(value, BaseCounter):
                if get_value is not None:
                    value = getattr(value, get_value)
                result[key] = value
            else:
                result[key] = value.to_dict(get_value)
        return result


class CounterManager(DictMixin):
    """
    A dict like counter manager.

    When using a tuple as event key, say: ('foo', 'bar'), You can visite counter
    with manager['foo']['bar'].  Or get all counters which first element is 'foo'
    by manager['foo'].

    It's useful for a group of counters.
    """

    def __init__(self, cls=TimebaseAverageWindowCounter):
        """init manager with Counter cls"""
        self.cls = cls
        self.counters = {}

    def event(self, key, value=1):
        """Fire a event of a counter by counter key"""
        if isinstance(key, six.string_types):
            key = (key, )
        assert isinstance(key, tuple), "event key type error"
        if key not in self.counters:
            self.counters[key] = self.cls()
        self.counters[key].event(value)
        return self

    def value(self, key, value=1):
        """Set value of a counter by counter key"""
        if isinstance(key, six.string_types):
            key = (key, )
        assert isinstance(key, tuple), "event key type error"
        if key not in self.counters:
            self.counters[key] = self.cls()
        self.counters[key].value(value)
        return self

    def trim(self):
        """Clear not used counters"""
        for key, value in list(iteritems(self.counters)):
            if value.empty():
                del self.counters[key]

    def __getitem__(self, key):
        key = (key, )
        available_keys = []
        for _key in self.counters:
            if _key[:len(key)] == key:
                available_keys.append(_key)

        if len(available_keys) == 0:
            raise KeyError
        elif len(available_keys) == 1:
            if available_keys[0] == key:
                return self.counters[key]
            else:
                return CounterValue(self, key)
        else:
            return CounterValue(self, key)

    def __delitem__(self, key):
        key = (key, )
        available_keys = []
        for _key in self.counters:
            if _key[:len(key)] == key:
                available_keys.append(_key)
        for _key in available_keys:
            del self.counters[_key]

    def __iter__(self):
        return iter(self.keys())

    def __len__(self):
        return len(self.keys())

    def keys(self):
        result = set()
        for key in self.counters:
            result.add(key[0] if key else ())
        return result

    def to_dict(self, get_value=None):
        """Dump counters as a dict"""
        self.trim()
        result = {}
        for key, value in iteritems(self):
            if isinstance(value, BaseCounter):
                if get_value is not None:
                    value = getattr(value, get_value)
                result[key] = value
            else:
                result[key] = value.to_dict(get_value)
        return result

    def dump(self, filename):
        """Dump counters to file"""
        try:
            with open(filename, 'wb') as fp:
                cPickle.dump(self.counters, fp)
        except:
            logging.error("can't dump counter to file: %s" % filename)
            return False
        return True

    def load(self, filename):
        """Load counters to file"""
        try:
            with open(filename) as fp:
                self.counters = cPickle.load(fp)
        except:
            logging.debug("can't load counter from file: %s" % filename)
            return False
        return True


1			#!/usr/bin/env python
2			# -- encoding: utf-8 --
3			# vim: set et sw=4 ts=4 sts=4 ff=unix fenc=utf8:
4			# Author: Binux<[email protected]>
5			# http://binux.me
6			# Created on 2012-11-14 17:09:50
7
8			from __future__ import unicode_literals, division, absolute_import
9
10			import time
11			import logging
12			from collections import deque
13			try:
14			from UserDict import DictMixin
15			except ImportError:
16			from collections import Mapping as DictMixin
17
18			import six
19			from six import iteritems
20			from six.moves import cPickle
21
22
23			class BaseCounter(object):
24
25			def __init__(self):
26			raise NotImplementedError
27
28			def event(self, value=1):
29			"""Fire a event."""
30			raise NotImplementedError
31
32			def value(self, value):
33			"""Set counter value."""
34			raise NotImplementedError
35
36			@property
37			def avg(self):
38			"""Get average value"""
39			raise NotImplementedError
40
41			@property
42			def sum(self):
43			"""Get sum of counter"""
44			raise NotImplementedError
45
46			def empty(self):
47			"""Clear counter"""
48			raise NotImplementedError
49
50
51			class TotalCounter(BaseCounter):
52			"""Total counter"""
53
54			def __init__(self):
55			self.cnt = 0
56
57			def event(self, value=1):
58			self.cnt += value
59
60			def value(self, value):
61			self.cnt = value
62
63			@property
64			def avg(self):
65			return self.cnt
66
67			@property
68			def sum(self):
69			return self.cnt
70
71			def empty(self):
72			return self.cnt == 0
73
74
75			class AverageWindowCounter(BaseCounter):
76			"""
77			Record last N(window) value
78			"""
79
80			def __init__(self, window_size=300):
81			self.window_size = window_size
82			self.values = deque(maxlen=window_size)
83
84			def event(self, value=1):
85			self.values.append(value)
86
87			value = event
88
89			@property
90			def avg(self):
91			return self.sum / len(self.values)
92
93			@property
94			def sum(self):
95			return sum(self.values)
96
97			def empty(self):
98			if not self.values:
99			return True
100
101
102			class TimebaseAverageEventCounter(BaseCounter):
103			"""
104			Record last window_size * window_interval seconds event.
105
106			records will trim ever window_interval seconds
107			"""
108
109			def __init__(self, window_size=30, window_interval=10):
110			self.max_window_size = window_size
111			self.window_size = 0
112			self.window_interval = window_interval
113			self.values = deque(maxlen=window_size)
114			self.events = deque(maxlen=window_size)
115			self.times = deque(maxlen=window_size)
116
117			self.cache_value = 0
118			self.cache_event = 0
119			self.cache_start = None
120			self._first_data_time = None
121
122			def event(self, value=1):
123			now = time.time()
124			if self._first_data_time is None:
125			self._first_data_time = now
126
127			if self.cache_start is None:
128			self.cache_value = value
129			self.cache_event = 1
130			self.cache_start = now
131			elif now - self.cache_start > self.window_interval:
132			self.values.append(self.cache_value)
133			self.events.append(self.cache_event)
134			self.times.append(self.cache_start)
135			self.on_append(self.cache_value, self.cache_start)
136			self.cache_value = value
137			self.cache_event = 1
138			self.cache_start = now
139			else:
140			self.cache_value += value
141			self.cache_event += 1
142			return self
143
144			def value(self, value):
145			self.cache_value = value
146
147			def _trim_window(self):
148			now = time.time()
149			if self.cache_start and now - self.cache_start > self.window_interval:
150			self.values.append(self.cache_value)
151			self.events.append(self.cache_event)
152			self.times.append(self.cache_start)
153			self.on_append(self.cache_value, self.cache_start)
154			self.cache_value = 0
155			self.cache_start = None
156
157			if self.window_size != self.max_window_size and self._first_data_time is not None:
158			time_passed = now - self._first_data_time
159			self.window_size = min(self.max_window_size, time_passed / self.window_interval)
160			window_limit = now - self.window_size * self.window_interval
161			while self.times and self.times[0] < window_limit:
162			self.times.popleft()
163			self.events.popleft()
164			self.values.popleft()
165
166			@property
167			def avg(self):
168			events = (sum(self.events) + self.cache_event)
169			if not events:
170			return 0
171			return float(self.sum) / events
172
173			@property
174			def sum(self):
175			self._trim_window()
176			return sum(self.values) + self.cache_value
177
178			def empty(self):
179			self._trim_window()
180			if not self.values and not self.cache_start:
181			return True
182
183			def on_append(self, value, time):
184			pass
185
186
187			class TimebaseAverageWindowCounter(BaseCounter):
188			"""
189			Record last window_size * window_interval seconds values.
190
191			records will trim ever window_interval seconds
192			"""
193
194			def __init__(self, window_size=30, window_interval=10):
195			self.max_window_size = window_size
196			self.window_size = 0
197			self.window_interval = window_interval
198			self.values = deque(maxlen=window_size)
199			self.times = deque(maxlen=window_size)
200
201			self.cache_value = 0
202			self.cache_start = None
203			self._first_data_time = None
204
205			def event(self, value=1):
206			now = time.time()
207			if self._first_data_time is None:
208			self._first_data_time = now
209
210			if self.cache_start is None:
211			self.cache_value = value
212			self.cache_start = now
213			elif now - self.cache_start > self.window_interval:
214			self.values.append(self.cache_value)
215			self.times.append(self.cache_start)
216			self.on_append(self.cache_value, self.cache_start)
217			self.cache_value = value
218			self.cache_start = now
219			else:
220			self.cache_value += value
221			return self
222
223			def value(self, value):
224			self.cache_value = value
225
226			def _trim_window(self):
227			now = time.time()
228			if self.cache_start and now - self.cache_start > self.window_interval:
229			self.values.append(self.cache_value)
230			self.times.append(self.cache_start)
231			self.on_append(self.cache_value, self.cache_start)
232			self.cache_value = 0
233			self.cache_start = None
234
235			if self.window_size != self.max_window_size and self._first_data_time is not None:
236			time_passed = now - self._first_data_time
237			self.window_size = min(self.max_window_size, time_passed / self.window_interval)
238			window_limit = now - self.window_size * self.window_interval
239			while self.times and self.times[0] < window_limit:
240			self.times.popleft()
241			self.values.popleft()
242
243			@property
244			def avg(self):
245			sum = float(self.sum)
246			if not self.window_size:
247			return 0
248			return sum / self.window_size / self.window_interval
249
250			@property
251			def sum(self):
252			self._trim_window()
253			return sum(self.values) + self.cache_value
254
255			def empty(self):
256			self._trim_window()
257			if not self.values and not self.cache_start:
258			return True
259
260			def on_append(self, value, time):
261			pass
262
263
264			class CounterValue(DictMixin):
265			"""
266			A dict like value item for CounterManager.
267			"""
268
269			def __init__(self, manager, keys):
270			self.manager = manager
271			self._keys = keys
272
273			def __getitem__(self, key):
274			if key == '__value__':
275			key = self._keys
276			return self.manager.counters[key]
277			else:
278			key = self._keys + (key, )
279
280			available_keys = []
281			for _key in self.manager.counters:
282			if _key[:len(key)] == key:
283			available_keys.append(_key)
284
285			if len(available_keys) == 0:
286			raise KeyError
287			elif len(available_keys) == 1:
288			if available_keys[0] == key:
289			return self.manager.counters[key]
290			else:
291			return CounterValue(self.manager, key)
292			else:
293			return CounterValue(self.manager, key)
294
295			def __len__(self):
296			return len(self.keys())
297
298			def __iter__(self):
299			return iter(self.keys())
300
301			def __contains__(self, key):
302			return key in self.keys()
303
304			def keys(self):
305			result = set()
306			for key in self.manager.counters:
307			if key[:len(self._keys)] == self._keys:
308			key = key[len(self._keys):]
309			result.add(key[0] if key else '__value__')
310			return result
311
312			def to_dict(self, get_value=None):
313			"""Dump counters as a dict"""
314			result = {}
315			for key, value in iteritems(self):
316			if isinstance(value, BaseCounter):
317			if get_value is not None:
318			value = getattr(value, get_value)
319			result[key] = value
320			else:
321			result[key] = value.to_dict(get_value)
322			return result
323
324
325			class CounterManager(DictMixin):
326			"""
327			A dict like counter manager.
328
329			When using a tuple as event key, say: ('foo', 'bar'), You can visite counter
330			with manager['foo']['bar']. Or get all counters which first element is 'foo'
331			by manager['foo'].
332
333			It's useful for a group of counters.
334			"""
335
336			def __init__(self, cls=TimebaseAverageWindowCounter):
337			"""init manager with Counter cls"""
338			self.cls = cls
339			self.counters = {}
340
341			def event(self, key, value=1):
342			"""Fire a event of a counter by counter key"""
343			if isinstance(key, six.string_types):
344			key = (key, )
345			assert isinstance(key, tuple), "event key type error"
346			if key not in self.counters:
347			self.counters[key] = self.cls()
348			self.counters[key].event(value)
349			return self
350
351			def value(self, key, value=1):
352			"""Set value of a counter by counter key"""
353			if isinstance(key, six.string_types):
354			key = (key, )
355			assert isinstance(key, tuple), "event key type error"
356			if key not in self.counters:
357			self.counters[key] = self.cls()
358			self.counters[key].value(value)
359			return self
360
361			def trim(self):
362			"""Clear not used counters"""
363			for key, value in list(iteritems(self.counters)):
364			if value.empty():
365			del self.counters[key]
366
367			def __getitem__(self, key):
368			key = (key, )
369			available_keys = []
370			for _key in self.counters:
371			if _key[:len(key)] == key:
372			available_keys.append(_key)
373
374			if len(available_keys) == 0:
375			raise KeyError
376			elif len(available_keys) == 1:
377			if available_keys[0] == key:
378			return self.counters[key]
379			else:
380			return CounterValue(self, key)
381			else:
382			return CounterValue(self, key)
383
384			def __delitem__(self, key):
385			key = (key, )
386			available_keys = []
387			for _key in self.counters:
388			if _key[:len(key)] == key:
389			available_keys.append(_key)
390			for _key in available_keys:
391			del self.counters[_key]
392
393			def __iter__(self):
394			return iter(self.keys())
395
396			def __len__(self):
397			return len(self.keys())
398
399			def keys(self):
400			result = set()
401			for key in self.counters:
402			result.add(key[0] if key else ())
403			return result
404
405			def to_dict(self, get_value=None):
406			"""Dump counters as a dict"""
407			self.trim()
408			result = {}
409			for key, value in iteritems(self):
410			if isinstance(value, BaseCounter):
411			if get_value is not None:
412			value = getattr(value, get_value)
413			result[key] = value
414			else:
415			result[key] = value.to_dict(get_value)
416			return result
417
418			def dump(self, filename):
419			"""Dump counters to file"""
420			try:
421			with open(filename, 'wb') as fp:
422			cPickle.dump(self.counters, fp)
423			except:
424			logging.error("can't dump counter to file: %s" % filename)
425			return False
426			return True
427
428			def load(self, filename):
429			"""Load counters to file"""
430			try:
431			with open(filename) as fp:
432			self.counters = cPickle.load(fp)
433			except:
434			logging.debug("can't load counter from file: %s" % filename)
435			return False
436			return True
437

binux / pyspider

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