<s> import logging <EOL> import sys <EOL> import time <EOL> import threading <EOL> from kafka . metrics import AnonMeasurable , KafkaMetric , MetricConfig , MetricName <EOL> from kafka . metrics . stats import Sensor <EOL> logger = logging . getLogger ( __name__ ) <EOL> class Metrics ( object ) : <EOL> """<STR_LIT>""" <EOL> def __init__ ( self , default_config = None , reporters = None , <EOL> enable_expiration = False ) : <EOL> """<STR_LIT>""" <EOL> self . _lock = threading . RLock ( ) <EOL> self . _config = default_config or MetricConfig ( ) <EOL> self . _sensors = { } <EOL> self . _metrics = { } <EOL> self . _children_sensors = { } <EOL> self . _reporters = reporters or [ ] <EOL> for reporter in self . _reporters : <EOL> reporter . init ( [ ] ) <EOL> if enable_expiration : <EOL> def expire_loop ( ) : <EOL> while True : <EOL> time . sleep ( <NUM_LIT:30> ) <EOL> self . ExpireSensorTask . run ( self ) <EOL> metrics_scheduler = threading . Thread ( target = expire_loop ) <EOL> metrics_scheduler . daemon = True <EOL> metrics_scheduler . start ( ) <EOL> self . add_metric ( self . metric_name ( '<STR_LIT:count>' , '<STR_LIT>' , <EOL> '<STR_LIT>' ) , <EOL> AnonMeasurable ( lambda config , now : len ( self . _metrics ) ) ) <EOL> @ property <EOL> def config ( self ) : <EOL> return self . _config <EOL> @ property <EOL> def metrics ( self ) : <EOL> """<STR_LIT>""" <EOL> return self . _metrics <EOL> def metric_name ( self , name , group , description = '<STR_LIT>' , tags = None ) : <EOL> """<STR_LIT>""" <EOL> combined_tags = dict ( self . config . tags ) <EOL> combined_tags . update ( tags or { } ) <EOL> return MetricName ( name , group , description , combined_tags ) <EOL> def get_sensor ( self , name ) : <EOL> """<STR_LIT>""" <EOL> if not name : <EOL> raise ValueError ( '<STR_LIT>' ) <EOL> return self . _sensors . get ( name , None ) <EOL> def sensor ( self , name , config = None , <EOL> inactive_sensor_expiration_time_seconds = sys . maxsize , <EOL> parents = None ) : <EOL> """<STR_LIT>""" <EOL> sensor = self . get_sensor ( name ) <EOL> if sensor : <EOL> return sensor <EOL> with self . _lock : <EOL> sensor = self . get_sensor ( name ) <EOL> if not sensor : <EOL> sensor = Sensor ( self , name , parents , config or self . config , <EOL> inactive_sensor_expiration_time_seconds ) <EOL> self . _sensors [ name ] = sensor <EOL> if parents : <EOL> for parent in parents : <EOL> children = self . _children_sensors . get ( parent ) <EOL> if not children : <EOL> children = [ ] <EOL> self . _children_sensors [ parent ] = children <EOL> children . append ( sensor ) <EOL> logger . debug ( '<STR_LIT>' , name ) <EOL> return sensor <EOL> def remove_sensor ( self , name ) : <EOL> """<STR_LIT>""" <EOL> sensor = self . _sensors . get ( name ) <EOL> if sensor : <EOL> child_sensors = None <EOL> with sensor . _lock : <EOL> with self . _lock : <EOL> val = self . _sensors . pop ( name , None ) <EOL> if val and val == sensor : <EOL> for metric in sensor . metrics : <EOL> self . remove_metric ( metric . metric_name ) <EOL> logger . debug ( '<STR_LIT>' , name ) <EOL> child_sensors = self . _children_sensors . pop ( sensor , None ) <EOL> if child_sensors : <EOL> for child_sensor in child_sensors : <EOL> self . remove_sensor ( child_sensor . name ) <EOL> def add_metric ( self , metric_name , measurable , config = None ) : <EOL> """<STR_LIT>""" <EOL> metric = KafkaMetric ( metric_name , measurable , config or self . config ) <EOL> self . register_metric ( metric ) <EOL> def remove_metric ( self , metric_name ) : <EOL> """<STR_LIT>""" <EOL> with self . _lock : <EOL> metric = self . _metrics . pop ( metric_name , None ) <EOL> if metric : <EOL> for reporter in self . _reporters : <EOL> reporter . metric_removal ( metric ) <EOL> return metric <EOL> def add_reporter ( self , reporter ) : <EOL> """<STR_LIT>""" <EOL> with self . _lock : <EOL> reporter . init ( list ( self . metrics . values ( ) ) ) <EOL> self . _reporters . append ( reporter ) <EOL> def register_metric ( self , metric ) : <EOL> with self . _lock : <EOL> if metric . metric_name in self . metrics : <EOL> raise ValueError ( '<STR_LIT>' <EOL> '<STR_LIT>' % metric . metric_name ) <EOL> self . metrics [ metric . metric_name ] = metric <EOL> for reporter in self . _reporters : <EOL> reporter . metric_change ( metric ) <EOL> class ExpireSensorTask ( object ) : <EOL> """<STR_LIT>""" <EOL> @ staticmethod <EOL> def run ( metrics ) : <EOL> items = list ( metrics . _sensors . items ( ) ) <EOL> for name , sensor in items : <EOL> with sensor . _lock : <EOL> if sensor . has_expired ( ) : <EOL> logger . debug ( '<STR_LIT>' , name ) <EOL> metrics . remove_sensor ( name ) <EOL> def close ( self ) : <EOL> """<STR_LIT>""" <EOL> for reporter in self . _reporters : <EOL> reporter . close ( ) </s>
