<s> from __future__ import absolute_import <EOL> import sys <EOL> import traceback <EOL> from flask import json <EOL> import signal <EOL> from multiprocessing import Process <EOL> from r5d4 . analytics import Analytics <EOL> from r5d4 . mapping_functions import MEASURING_FUNCTIONS_MAP , DIMENSION_PARSERS_MAP <EOL> from r5d4 . flask_redis import get_conf_db , get_data_db <EOL> from r5d4 . utility import construct_key <EOL> from r5d4 . logger import get_worker_log <EOL> from r5d4 import app <EOL> def actual_worker ( analytics_name , sub , app ) : <EOL> log = get_worker_log ( analytics_name ) <EOL> try : <EOL> conf_db = get_conf_db ( app , exclusive = True ) <EOL> defn = conf_db . get ( "<STR_LIT>" % analytics_name ) <EOL> analytics = Analytics ( defn ) <EOL> if analytics [ "<STR_LIT>" ] : <EOL> data_db = get_data_db ( analytics [ "<STR_LIT>" ] , app = app ) <EOL> else : <EOL> data_db = get_data_db ( app = app ) <EOL> measures = set ( analytics [ "<STR_LIT>" ] ) <EOL> query_dimensions = set ( analytics [ "<STR_LIT>" ] ) <EOL> slice_dimensions = set ( analytics [ "<STR_LIT>" ] ) <EOL> mapping = analytics [ "<STR_LIT>" ] <EOL> for content in sub . listen ( ) : <EOL> if content [ "<STR_LIT:type>" ] == "<STR_LIT:message>" : <EOL> try : <EOL> data = json . loads ( content [ "<STR_LIT:data>" ] ) <EOL> transaction = data [ "<STR_LIT>" ] <EOL> tr_type = data [ "<STR_LIT>" ] <EOL> snoq_dimensions = slice_dimensions - query_dimensions <EOL> qnos_dimensions = query_dimensions - slice_dimensions <EOL> def build_key_str ( dimensions ) : <EOL> key = [ ] <EOL> for dimension in sorted ( list ( dimensions ) ) : <EOL> d_type = mapping [ dimension ] [ "<STR_LIT:type>" ] <EOL> function = DIMENSION_PARSERS_MAP [ d_type ] <EOL> field = mapping [ dimension ] [ "<STR_LIT>" ] <EOL> key . append ( dimension ) <EOL> key . append ( function ( transaction [ field ] ) ) <EOL> return construct_key ( key ) <EOL> query_key_str = build_key_str ( query_dimensions ) <EOL> slice_key_str = build_key_str ( slice_dimensions ) <EOL> snoq_key_str = build_key_str ( snoq_dimensions ) <EOL> for dimension in sorted ( list ( qnos_dimensions ) ) : <EOL> field = mapping [ dimension ] [ "<STR_LIT>" ] <EOL> ref_count_key = construct_key ( '<STR_LIT>' , <EOL> slice_key_str , <EOL> dimension ) <EOL> if tr_type == "<STR_LIT>" : <EOL> value = data_db . hincrby ( ref_count_key , <EOL> transaction [ field ] , <EOL> <NUM_LIT:1> ) <EOL> elif tr_type == "<STR_LIT>" : <EOL> value = data_db . hincrby ( ref_count_key , <EOL> transaction [ field ] , <EOL> - <NUM_LIT:1> ) <EOL> if value == <NUM_LIT:0> : <EOL> data_db . hdel ( ref_count_key , transaction [ field ] ) <EOL> for m in measures : <EOL> if mapping [ m ] [ "<STR_LIT>" ] != content [ "<STR_LIT>" ] : <EOL> continue <EOL> key_str = construct_key ( m , query_key_str , snoq_key_str ) <EOL> function = MEASURING_FUNCTIONS_MAP [ mapping [ m ] [ "<STR_LIT:type>" ] ] <EOL> field = mapping [ m ] . get ( "<STR_LIT>" , None ) <EOL> conditions = mapping [ m ] . get ( "<STR_LIT>" , [ ] ) <EOL> kwargs = { <EOL> "<STR_LIT>" : key_str , <EOL> } <EOL> for condition in conditions : <EOL> condition_field = condition [ "<STR_LIT>" ] <EOL> equals = condition . get ( "<STR_LIT>" , None ) <EOL> not_equals = condition . get ( "<STR_LIT>" , None ) <EOL> if equals is not None : <EOL> if transaction [ condition_field ] != equals : <EOL> break <EOL> elif not_equals is not None : <EOL> if transaction [ condition_field ] == not_equals : <EOL> break <EOL> else : <EOL> if field is not None : <EOL> kwargs [ "<STR_LIT>" ] = transaction [ field ] <EOL> function ( data_db , tr_type , ** kwargs ) <EOL> except Exception , e : <EOL> log . error ( "<STR_LIT>" % <EOL> traceback . format_exc ( ) ) <EOL> log . debug ( "<STR_LIT>" % content [ "<STR_LIT>" ] ) <EOL> log . debug ( "<STR_LIT>" % json . dumps ( data ) ) <EOL> except Exception , e : <EOL> log . critical ( "<STR_LIT>" % str ( e ) ) <EOL> log . debug ( "<STR_LIT>" % traceback . format_exc ( ) ) <EOL> signal . pause ( ) <EOL> class AnalyticsWorker ( ) : <EOL> def __init__ ( self , app ) : <EOL> self . app = app <EOL> self . conf_db = get_conf_db ( app , exclusive = True ) <EOL> self . proc = { } <EOL> self . subs = { } <EOL> self . log = get_worker_log ( '<STR_LIT>' ) <EOL> signal . signal ( signal . SIGTERM , self . termination_handler ) <EOL> signal . signal ( signal . SIGINT , self . termination_handler ) <EOL> signal . signal ( signal . SIGCHLD , self . child_handler ) <EOL> def create_worker ( self , a_name ) : <EOL> sub = self . conf_db . pubsub ( ) <EOL> sub . subscribe ( self . conf_db . smembers ( <EOL> "<STR_LIT>" % a_name <EOL> ) ) <EOL> self . subs [ a_name ] = sub <EOL> prev_chld_handler = signal . signal ( signal . SIGCHLD , signal . SIG_DFL ) <EOL> prev_term_handler = signal . signal ( signal . SIGTERM , signal . SIG_DFL ) <EOL> prev_int_handler = signal . signal ( signal . SIGINT , signal . SIG_DFL ) <EOL> self . log . info ( "<STR_LIT>" % a_name ) <EOL> p = Process ( target = actual_worker , args = ( a_name , sub , self . app ) ) <EOL> p . start ( ) <EOL> signal . signal ( signal . SIGTERM , prev_term_handler ) <EOL> signal . signal ( signal . SIGINT , prev_int_handler ) <EOL> signal . signal ( signal . SIGCHLD , prev_chld_handler ) <EOL> self . proc [ a_name ] = p <EOL> def destroy_worker ( self , a_name ) : <EOL> self . log . info ( "<STR_LIT>" % a_name ) <EOL> prev_chld_handler = signal . signal ( signal . SIGCHLD , signal . SIG_IGN ) <EOL> p = self . proc [ a_name ] <EOL> del self . proc [ a_name ] <EOL> p . terminate ( ) <EOL> p . join ( ) <EOL> self . subs [ a_name ] . unsubscribe ( ) <EOL> del self . subs [ a_name ] <EOL> signal . signal ( signal . SIGCHLD , prev_chld_handler ) <EOL> def update_analytics ( self ) : <EOL> old_a_name = set ( self . subs . keys ( ) ) <EOL> new_a_name = set ( self . conf_db . smembers ( '<STR_LIT>' ) ) <EOL> add_a_name = new_a_name - old_a_name <EOL> for a_name in add_a_name : <EOL> self . create_worker ( a_name ) <EOL> rem_a_name = old_a_name - new_a_name <EOL> for a_name in rem_a_name : <EOL> self . destroy_worker ( a_name ) <EOL> for a_name in old_a_name & new_a_name : <EOL> old_subs = self . subs [ a_name ] . channels <EOL> new_subs = self . conf_db . smembers ( <EOL> "<STR_LIT>" % a_name <EOL> ) <EOL> add_sub = new_subs - old_subs <EOL> for s in add_sub : <EOL> self . subs [ a_name ] . subscribe ( s ) <EOL> rem_sub = old_subs - new_subs <EOL> for s in rem_sub : <EOL> self . subs [ a_name ] . unsubscribe ( s ) <EOL> if self . subs [ a_name ] . subscription_count == <NUM_LIT:0> : <EOL> self . destroy_worker ( a_name ) <EOL> def start ( self ) : <EOL> for a_name in self . conf_db . smembers ( '<STR_LIT>' ) : <EOL> self . create_worker ( a_name ) <EOL> self . log . info ( "<STR_LIT>" ) <EOL> commands = self . conf_db . pubsub ( ) <EOL> commands . subscribe ( '<STR_LIT>' ) <EOL> for cmd in commands . listen ( ) : <EOL> if cmd [ '<STR_LIT:type>' ] == '<STR_LIT:message>' : <EOL> self . log . debug ( '<STR_LIT>' , cmd [ '<STR_LIT:data>' ] ) <EOL> if cmd [ "<STR_LIT:data>" ] . lower ( ) == "<STR_LIT>" : <EOL> self . update_analytics ( ) <EOL> self . log . info ( "<STR_LIT>" ) <EOL> def __del__ ( self ) : <EOL> signal . signal ( signal . SIGCHLD , signal . SIG_DFL ) <EOL> signal . signal ( signal . SIGTERM , signal . SIG_DFL ) <EOL> signal . signal ( signal . SIGINT , signal . SIG_DFL ) <EOL> for p in self . proc . values ( ) : <EOL> if p . is_alive ( ) : <EOL> p . terminate ( ) <EOL> p . join ( ) <EOL> def child_handler ( self , sig_val , ret_code ) : <EOL> for a_name in self . proc . keys ( ) : <EOL> if not self . proc [ a_name ] . is_alive ( ) : <EOL> self . log . warn ( <EOL> "<STR_LIT>" % a_name <EOL> ) <EOL> self . destroy_worker ( a_name ) <EOL> self . create_worker ( a_name ) <EOL> def termination_handler ( self , sig_val , ret_code ) : <EOL> self . log . info ( "<STR_LIT>" ) <EOL> self . __del__ ( ) <EOL> sys . exit ( <NUM_LIT:0> ) <EOL> def start_analytics_worker ( app ) : <EOL> def aw_start ( ) : <EOL> AnalyticsWorker ( app ) . start ( ) <EOL> p = Process ( target = aw_start ) <EOL> p . start ( ) <EOL> return p <EOL> if __name__ == "<STR_LIT:__main__>" : <EOL> p = start_analytics_worker ( app = app ) <EOL> try : <EOL> p . join ( ) <EOL> except KeyboardInterrupt : <EOL> if p . is_alive ( ) : <EOL> p . terminate ( ) </s>
