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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:19:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:20:17 +0000 |
commit | a64a253794ac64cb40befee54db53bde17dd0d49 (patch) | |
tree | c1024acc5f6e508814b944d99f112259bb28b1be /collectors/python.d.plugin/python_modules/bases/charts.py | |
parent | New upstream version 1.10.0+dfsg (diff) | |
download | netdata-2dec20452b290c484d509f7ac9a29b38cf690223.tar.xz netdata-2dec20452b290c484d509f7ac9a29b38cf690223.zip |
New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/python.d.plugin/python_modules/bases/charts.py')
-rw-r--r-- | collectors/python.d.plugin/python_modules/bases/charts.py | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/collectors/python.d.plugin/python_modules/bases/charts.py b/collectors/python.d.plugin/python_modules/bases/charts.py new file mode 100644 index 000000000..2963739ec --- /dev/null +++ b/collectors/python.d.plugin/python_modules/bases/charts.py @@ -0,0 +1,394 @@ +# -*- coding: utf-8 -*- +# Description: +# Author: Ilya Mashchenko (l2isbad) +# SPDX-License-Identifier: GPL-3.0-or-later + +from bases.collection import safe_print + +CHART_PARAMS = ['type', 'id', 'name', 'title', 'units', 'family', 'context', 'chart_type', 'hidden'] +DIMENSION_PARAMS = ['id', 'name', 'algorithm', 'multiplier', 'divisor', 'hidden'] +VARIABLE_PARAMS = ['id', 'value'] + +CHART_TYPES = ['line', 'area', 'stacked'] +DIMENSION_ALGORITHMS = ['absolute', 'incremental', 'percentage-of-absolute-row', 'percentage-of-incremental-row'] + +CHART_BEGIN = 'BEGIN {type}.{id} {since_last}\n' +CHART_CREATE = "CHART {type}.{id} '{name}' '{title}' '{units}' '{family}' '{context}' " \ + "{chart_type} {priority} {update_every} '{hidden}' 'python.d.plugin' '{module_name}'\n" +CHART_OBSOLETE = "CHART {type}.{id} '{name}' '{title}' '{units}' '{family}' '{context}' " \ + "{chart_type} {priority} {update_every} '{hidden} obsolete'\n" + + +DIMENSION_CREATE = "DIMENSION '{id}' '{name}' {algorithm} {multiplier} {divisor} '{hidden}'\n" +DIMENSION_SET = "SET '{id}' = {value}\n" + +CHART_VARIABLE_SET = "VARIABLE CHART '{id}' = {value}\n" + +RUNTIME_CHART_CREATE = "CHART netdata.runtime_{job_name} '' 'Execution time for {job_name}' 'ms' 'python.d' " \ + "netdata.pythond_runtime line 145000 {update_every}\n" \ + "DIMENSION run_time 'run time' absolute 1 1\n" + + +def create_runtime_chart(func): + """ + Calls a wrapped function, then prints runtime chart to stdout. + + Used as a decorator for SimpleService.create() method. + The whole point of making 'create runtime chart' functionality as a decorator was + to help users who re-implements create() in theirs classes. + + :param func: class method + :return: + """ + def wrapper(*args, **kwargs): + self = args[0] + ok = func(*args, **kwargs) + if ok: + safe_print(RUNTIME_CHART_CREATE.format(job_name=self.name, + update_every=self._runtime_counters.FREQ)) + return ok + return wrapper + + +class ChartError(Exception): + """Base-class for all exceptions raised by this module""" + + +class DuplicateItemError(ChartError): + """Occurs when user re-adds a chart or a dimension that has already been added""" + + +class ItemTypeError(ChartError): + """Occurs when user passes value of wrong type to Chart, Dimension or ChartVariable class""" + + +class ItemValueError(ChartError): + """Occurs when user passes inappropriate value to Chart, Dimension or ChartVariable class""" + + +class Charts: + """Represent a collection of charts + + All charts stored in a dict. + Chart is a instance of Chart class. + Charts adding must be done using Charts.add_chart() method only""" + def __init__(self, job_name, priority, cleanup, get_update_every, module_name): + """ + :param job_name: <bound method> + :param priority: <int> + :param get_update_every: <bound method> + """ + self.job_name = job_name + self.priority = priority + self.cleanup = cleanup + self.get_update_every = get_update_every + self.module_name = module_name + self.charts = dict() + + def __len__(self): + return len(self.charts) + + def __iter__(self): + return iter(self.charts.values()) + + def __repr__(self): + return 'Charts({0})'.format(self) + + def __str__(self): + return str([chart for chart in self.charts]) + + def __contains__(self, item): + return item in self.charts + + def __getitem__(self, item): + return self.charts[item] + + def __delitem__(self, key): + del self.charts[key] + + def __bool__(self): + return bool(self.charts) + + def __nonzero__(self): + return self.__bool__() + + def add_chart(self, params): + """ + Create Chart instance and add it to the dict + + Manually adds job name, priority and update_every to params. + :param params: <list> + :return: + """ + params = [self.job_name()] + params + new_chart = Chart(params) + + new_chart.params['update_every'] = self.get_update_every() + new_chart.params['priority'] = self.priority + new_chart.params['module_name'] = self.module_name + + self.priority += 1 + self.charts[new_chart.id] = new_chart + + return new_chart + + def active_charts(self): + return [chart.id for chart in self if not chart.flags.obsoleted] + + +class Chart: + """Represent a chart""" + def __init__(self, params): + """ + :param params: <list> + """ + if not isinstance(params, list): + raise ItemTypeError("'chart' must be a list type") + if not len(params) >= 8: + raise ItemValueError("invalid value for 'chart', must be {0}".format(CHART_PARAMS)) + + self.params = dict(zip(CHART_PARAMS, (p or str() for p in params))) + self.name = '{type}.{id}'.format(type=self.params['type'], + id=self.params['id']) + if self.params.get('chart_type') not in CHART_TYPES: + self.params['chart_type'] = 'absolute' + hidden = str(self.params.get('hidden', '')) + self.params['hidden'] = 'hidden' if hidden == 'hidden' else '' + + self.dimensions = list() + self.variables = set() + self.flags = ChartFlags() + self.penalty = 0 + + def __getattr__(self, item): + try: + return self.params[item] + except KeyError: + raise AttributeError("'{instance}' has no attribute '{attr}'".format(instance=repr(self), + attr=item)) + + def __repr__(self): + return 'Chart({0})'.format(self.id) + + def __str__(self): + return self.id + + def __iter__(self): + return iter(self.dimensions) + + def __contains__(self, item): + return item in [dimension.id for dimension in self.dimensions] + + def add_variable(self, variable): + """ + :param variable: <list> + :return: + """ + self.variables.add(ChartVariable(variable)) + + def add_dimension(self, dimension): + """ + :param dimension: <list> + :return: + """ + dim = Dimension(dimension) + + if dim.id in self: + raise DuplicateItemError("'{dimension}' already in '{chart}' dimensions".format(dimension=dim.id, + chart=self.name)) + self.refresh() + self.dimensions.append(dim) + return dim + + def hide_dimension(self, dimension_id, reverse=False): + if dimension_id in self: + idx = self.dimensions.index(dimension_id) + dimension = self.dimensions[idx] + dimension.params['hidden'] = 'hidden' if not reverse else str() + self.refresh() + + def create(self): + """ + :return: + """ + chart = CHART_CREATE.format(**self.params) + dimensions = ''.join([dimension.create() for dimension in self.dimensions]) + variables = ''.join([var.set(var.value) for var in self.variables if var]) + + self.flags.push = False + self.flags.created = True + + safe_print(chart + dimensions + variables) + + def can_be_updated(self, data): + for dim in self.dimensions: + if dim.get_value(data) is not None: + return True + return False + + def update(self, data, interval): + updated_dimensions, updated_variables = str(), str() + + for dim in self.dimensions: + value = dim.get_value(data) + if value is not None: + updated_dimensions += dim.set(value) + + for var in self.variables: + value = var.get_value(data) + if value is not None: + updated_variables += var.set(value) + + if updated_dimensions: + since_last = interval if self.flags.updated else 0 + + if self.flags.push: + self.create() + + chart_begin = CHART_BEGIN.format(type=self.type, id=self.id, since_last=since_last) + safe_print(chart_begin, updated_dimensions, updated_variables, 'END\n') + + self.flags.updated = True + self.penalty = 0 + else: + self.penalty += 1 + self.flags.updated = False + + return bool(updated_dimensions) + + def obsolete(self): + self.flags.obsoleted = True + if self.flags.created: + safe_print(CHART_OBSOLETE.format(**self.params)) + + def refresh(self): + self.penalty = 0 + self.flags.push = True + self.flags.obsoleted = False + + +class Dimension: + """Represent a dimension""" + def __init__(self, params): + """ + :param params: <list> + """ + if not isinstance(params, list): + raise ItemTypeError("'dimension' must be a list type") + if not params: + raise ItemValueError("invalid value for 'dimension', must be {0}".format(DIMENSION_PARAMS)) + + self.params = dict(zip(DIMENSION_PARAMS, (p or str() for p in params))) + self.params['name'] = self.params.get('name') or self.params['id'] + + if self.params.get('algorithm') not in DIMENSION_ALGORITHMS: + self.params['algorithm'] = 'absolute' + if not isinstance(self.params.get('multiplier'), int): + self.params['multiplier'] = 1 + if not isinstance(self.params.get('divisor'), int): + self.params['divisor'] = 1 + self.params.setdefault('hidden', '') + + def __getattr__(self, item): + try: + return self.params[item] + except KeyError: + raise AttributeError("'{instance}' has no attribute '{attr}'".format(instance=repr(self), + attr=item)) + + def __repr__(self): + return 'Dimension({0})'.format(self.id) + + def __str__(self): + return self.id + + def __eq__(self, other): + if not isinstance(other, Dimension): + return self.id == other + return self.id == other.id + + def __ne__(self, other): + return not self == other + + def __hash__(self): + return hash(repr(self)) + + def create(self): + return DIMENSION_CREATE.format(**self.params) + + def set(self, value): + """ + :param value: <str>: must be a digit + :return: + """ + return DIMENSION_SET.format(id=self.id, + value=value) + + def get_value(self, data): + try: + return int(data[self.id]) + except (KeyError, TypeError): + return None + + +class ChartVariable: + """Represent a chart variable""" + def __init__(self, params): + """ + :param params: <list> + """ + if not isinstance(params, list): + raise ItemTypeError("'variable' must be a list type") + if not params: + raise ItemValueError("invalid value for 'variable' must be: {0}".format(VARIABLE_PARAMS)) + + self.params = dict(zip(VARIABLE_PARAMS, params)) + self.params.setdefault('value', None) + + def __getattr__(self, item): + try: + return self.params[item] + except KeyError: + raise AttributeError("'{instance}' has no attribute '{attr}'".format(instance=repr(self), + attr=item)) + + def __bool__(self): + return self.value is not None + + def __nonzero__(self): + return self.__bool__() + + def __repr__(self): + return 'ChartVariable({0})'.format(self.id) + + def __str__(self): + return self.id + + def __eq__(self, other): + if isinstance(other, ChartVariable): + return self.id == other.id + return False + + def __ne__(self, other): + return not self == other + + def __hash__(self): + return hash(repr(self)) + + def set(self, value): + return CHART_VARIABLE_SET.format(id=self.id, + value=value) + + def get_value(self, data): + try: + return int(data[self.id]) + except (KeyError, TypeError): + return None + + +class ChartFlags: + def __init__(self): + self.push = True + self.created = False + self.updated = False + self.obsoleted = False |