def getNewsSummariesForUser(user_id, page_num):
page_num = int(page_num)
begin_index = (page_num - 1) * news_list_batch_size
end_index = page_num * news_list_batch_size
# The final list of news to be returned.
sliced_news = []
# personalizing: decide each class's number
preferences = news_recommendation_service_client.getPreferenceForUser(user_id)
news_numbers = []
if preferences is not None and len(preferences) > 0:
news_numbers = [int(round(preference * news_limit)) for preference in preferences]
print news_numbers
if redis_client.get(user_id) is not None:
news_digests = pickle.loads(redis_client.get(user_id))
# If begin_index is out of range, this will return empty list;
# If end_index is out of range (begin_index is within the range), this
# will return all remaining news ids.
sliced_news_digests = news_digests[begin_index:end_index]
db = mongodb_client.get_db()
sliced_news = list(db[news_table_name].find({
'digest': {
'$in': sliced_news_digests
}
}))
else:
db = mongodb_client.get_db()
print 'taking from db'
# according to each class's number, take each class's amount of news, and sort them back together
selected_news = []
for i in range(0, len(news_numbers)):
selected_news.extend(list(db[news_table_name].find({
'class': news_classes_v2.class_map[str(i+1)]
}).limit(news_numbers[i])))
selected_news = sorted(selected_news, key=lambda k: k['publishedAt'], reverse=True)[:]
# caching digests and paging
selected_news_digests = map(lambda x:x['digest'], selected_news)
redis_client.set(user_id, pickle.dumps(selected_news_digests))
redis_client.expire(user_id, user_news_time_out_in_seconds)
sliced_news = selected_news[begin_index:end_index]
# other taggings and returning
for news in sliced_news:
del news['text']
if news['publishedAt'].date() == datetime.today().date():
news['time'] = 'today'
return json.loads(dumps(sliced_news))
def handle_message(msg):
if msg is None or not isinstance(msg, dict) :
return
task = msg
text = str(task['text'])
if text is None:
return
# get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year, published_at.month, published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({'publishedAt': {'$gte': published_at_day_begin, '$lt': published_at_day_end}}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [str(news['text']) for news in same_day_news_list]
documents.insert(0, text)
# Calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim.A
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# Duplicated news. Ignore.
print "Duplicated news. Ignore."
return
task['publishedAt'] = parser.parse(task['publishedAt'])
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']}, task, upsert=True)
def getPreferenceForUser(self, user_id):
logging.info('news_recommendation_server: getting preference model for %s' % user_id)
db = mongodb_client.get_db()
model = db[preference_model_table_name].find_one({'userId':user_id})
# Note: createing new preference model for new users is migrated here,
# because we need this model to decide the number of news sent to user in each class in backend
# we can no longer wait for the click log processor to do that for us
if model is None:
print 'Creating preference model for new user: %s' % user_id
logging.info('news_recommendation_server: creating preference model for %s' % user_id)
new_model = {'userId' : user_id}
preference = {}
for i in news_classes_v2.classes:
preference[i] = float(initial_p)
new_model['preference'] = preference
model = new_model
db[preference_model_table_name].replace_one({'userId': user_id}, model, upsert=True)
# another change is that: the whole list of preference is useful now, not only the top element
preference_tuples = model['preference'].items()
preference_list = [x[0] for x in preference_tuples]
preference_value_list = [x[1] for x in preference_tuples]
print preference_list
print preference_value_list
return preference_value_list
def test_basic():
db = client.get_db('test')
db.demo.drop()
assert db.demo.count() == 0
db.demo.insert({'test':123})
assert db.demo.count() == 1
db.demo.drop()
assert db.demo.count() == 0
print 'test_basic passed!'
def handle_message(msg):
if msg is None or not isinstance(msg, dict) :
print 'broken msg'
logging.error('news_recommendation_server: broken message in click log queue')
return
if ('userId' not in msg
or 'newsId' not in msg
or 'rate' not in msg
or 'timestamp' not in msg):
print 'wrong msg'
logging.error('news_recommendation_server: wrong message in click log queue')
return
userId = msg['userId']
newsId = msg['newsId']
rate = msg['rate']
db = mongodb_client.get_db()
model = db[preference_model_table_name].find_one({'userId': userId})
if (model is None):
print 'user preference model not found'
logging.error('news_recommendation_server: user preference model for %s not found' % userId)
print 'Updating preference model for new user: %s' % userId
logging.info('news_recommendation_server: Updating preference model for new user: %s' % userId)
news = db[news_table_name].find_one({'digest': newsId})
if (news is None
or 'class' not in news
or news['class'] not in news_classes_v2.classes):
print news is None
print 'class' not in news
print news['class'] not in news_classes_v2.classes
print 'Skipping processing...'
logging.error('news_recommendation_server: class for news: %s in click_task not defined' % newsId)
return
click_class = news['class']
print click_class
print rate
# do positive or negative time decay model according to user's rate:
if(rate == '1'):
print 'raising'
logging.info('news_recommendation_server: raising %s news for %s' %(click_class, userId))
raise_class(click_class, model)
elif(rate == '-1'):
print 'depressing'
logging.info('news_recommendation_server: depressing %s news for %s' %(click_class, userId))
depress_class(click_class, model)
db[preference_model_table_name].replace_one({'userId': userId}, model, upsert=True)
print 'processing finished'
logging.info('news_recommendation_server: processing finished')
print model['preference']
def test_basic():
db = client.get_db('test')
db.testData.drop()
assert db.testData.count() == 0
db.testData.insert({'test': 123})
db.testData.insert({'test': 223})
assert db.testData.count() == 2
'''
db.demo.drop()
assert db.demo.count() == 0
'''
print 'test_basic passed!'
def test_basic():
db = client.get_db("test")
db.test.drop()
assert db.test.count() == 0
db.test.insert({"test": "test"})
assert db.test.count() == 1
db.test.drop()
assert db.test.count() == 0
print("test basic passed.")
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
if ('userId' not in msg or 'newsId' not in msg):
return
userId = msg['userId']
newsId = msg['newsId']
# Update user's preference
db = mongodb_client.get_db()
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'userId': userId})
print model
# If model not exists, create a new one
if model is None:
print 'Creating preference model for new user: %s' % userId
new_model = {'userId': userId}
preference = {}
for i in news_classes.classes:
preference[i] = float(
INITIAL_P
) # set the value of the news class in dict 'preference' all to 0.17(INITIAL_P)
new_model['preference'] = preference
model = new_model
print 'Updating preference model for new user: %s' % userId
# Update model using time decaying method
news = db[NEWS_TABLE_NAME].find_one({'digest': newsId})
if (news is None or 'class' not in news
or news['class'] not in news_classes.classes):
print news is None
# print 'class' not in news
# print news['class'] not in news_classes.classes
print 'Skipping processing...'
return
click_class = news['class'] # get the class of clicked news
# Update the clicked one.
old_p = model['preference'][click_class]
model['preference'][click_class] = float((1 - ALPHA) * old_p + ALPHA)
# Update not clicked classes.
for i, prob in model['preference'].iteritems():
if not i == click_class:
model['preference'][i] = float(
(1 - ALPHA) * model['preference'][i])
db[PREFERENCE_MODEL_TABLE_NAME].replace_one({'userId': userId},
model,
upsert=True)
def test_basic():
db = client.get_db('test')
db.demo.drop()
assert db.demo.count() == 0
db.demo.insert({'test': 123})
assert db.demo.count() == 1
db.demo.drop()
assert db.demo.count() == 0
print 'test_basic passed!'
def handle_msg(msg):
if msg is None or not isinstance(msg, dict):
logging.error('Invalid click log message')
return
if ('userId' not in msg or 'newsId' not in msg or 'timestamp' not in msg):
logging.error('Click log message does not contain necessary info')
return
userId = msg['userId']
newsId = msg['newsId']
# Update user's preference
db = mongodb_client.get_db()
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'userId': userId})
# If model does not exist, create a new one
if model is None:
logging.info('New user... Creating preference model for user: %s' %
userId)
new_model = {'userId': userId}
preference = {}
for i in NEWS_CLASSES:
preference[i] = float(INITIAL_P)
new_model['preference'] = preference
model = new_model
logging.info('Updating preference model for user: %s' % userId)
# Update the model using time decay method
news = db[NEWS_TABLE_NAME].find_one({'digest': newsId})
if (news is None or 'class' not in news
or news['class'] not in NEWS_CLASSES):
logging.error(news is None, exc_info=True)
logging.error('class' not in news, exc_info=True)
logging.error(news['class'] not in NEWS_CLASSES, exc_info=True)
return
click_class = news['class']
# Update the clicked one
old_p = model['preference'][click_class]
model['preference'][click_class] = float((1 - ALPHA) * old_p + ALPHA)
# Update not clicked ones
for i, prob in model['preference'].iteritems():
if not i == click_class:
model['preference'][i] = float(
(1 - ALPHA) * model['preference'][i])
db[PREFERENCE_MODEL_TABLE_NAME].replace_one({'userId': userId},
model,
upsert=True)
def test_basic():
db = client.get_db('test')
db.test.drop()
assert db.test.count() == 0
db.test.insert({'test': 1})
assert db.test.count() == 1
db.test.drop()
assert db.test.count() == 0
print('test_basic passed.')
def handle_message(msg):
if not isinstance(msg, dict):
return
if ('userId' not in msg or 'newsId' not in msg or 'timestamp' not in msg):
return
user_id = msg['userId']
news_id = msg['newsId']
# update user preference
db = mongodb_client.get_db()
model = db[PREFERENCE_TABLE_NAME].find_one({'userId': user_id})
if model is None:
LOGGER.info('Creating preference model for new user: %s', user_id)
new_model = {'userId': user_id}
preference = {}
for i in news_classes.classes:
preference[i] = float(INIT_P)
new_model['preference'] = preference
model = new_model
LOGGER.info('Updating preference model for user %s', user_id)
# update model using time decying method
news = db[NEWS_TABLE_NAME].find_one({'digest': news_id})
# news should have 'class' field
# and the class should be in the news_class list
if news is None:
LOGGER.info('there is no news with digest: ' + news_id)
return
if 'class' not in news:
LOGGER.info('there is no class for news.')
return
if news['class'] not in news_classes.classes:
LOGGER.info('do not have a valid class: ' + news['class'])
return
click_class = news['class']
# update the clicked one
old_p = model['preference'][click_class]
model['preference'][click_class] = float((1 - ALPHA) * old_p + ALPHA)
# update note clied classes
for i, _ in model['preference'].items():
if not i == click_class:
model['preference'][i] = float(
(1 - ALPHA) * model['preference'][i])
db[PREFERENCE_TABLE_NAME].replace_one({'userId': user_id},
model,
upsert=True)
def get_news_summaries_for_user(user_id, page_num):
page_num = int(page_num)
if page_num <= 0:
return []
begin_index = (page_num - 1) * NEWS_LIST_BATCH_SIZE
end_index = page_num * NEWS_LIST_BATCH_SIZE
sliced_news = []
if redis_client.get(user_id) is not None:
total_news_digests = pickle.loads(redis_client.get(user_id))
sliced_news_digests = total_news_digests[begin_index:end_index]
db = mongodb_client.get_db()
sliced_news = list(db[NEWS_TABLE_NAME].find({'digest':{'$in':sliced_news_digests}}))
else:
db = mongodb_client.get_db()
total_news = list(db[NEWS_TABLE_NAME].find().sort([('publishedAt', -1)]).limit(NEWS_LIMIT))
total_news_digests = [x['digest'] for x in total_news]
redis_client.set(user_id, pickle.dumps(total_news_digests))
redis_client.expire(user_id, USER_NEWS_TIME_OUT_IN_SECONDS)
sliced_news = total_news[begin_index:end_index]
# Get preference list for the user.
# TODO: use preference to customize returned news list.
preference = news_recommendation_service_client.getPreferenceForUser(user_id)
topPreference = None
if preference is not None and len(preference) > 0:
topPreference = preference[0]
for news in sliced_news:
# Remove text field to save bandwidth.
del news['text']
if news['publishedAt'].date() == datetime.today().date():
news['time'] = 'today'
if news['class'] == topPreference:
news['reason'] = 'Recommend'
return json.loads(dumps(sliced_news))
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
print('message is broken')
return
if ('userId' not in msg or 'newsId' not in msg or 'timestamp' not in msg):
print ('bad message')
print (msg)
return
userId = msg['userId']
newsId = msg['newsId']
# Update user's preference model.
db = mongodb_client.get_db()
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'userId':userId})
# If model not exists, create a new one.
if model is None:
print("Creating preference model for new user: %s" % userId)
new_model = {'userId':userId}
preference = {}
for i in news_classes.classes:
preference[i] = float(INITIAL_P)
new_model['preference'] = preference
model = new_model
# Update model using time decay method.
news = db[NEWS_TABLE_NAME].find_one({'digest':newsId})
if (news is None or 'class' not in news or news['class'] not in news_classes.classes):
print (news.keys())
if 'class' in news:
print (news['class'])
print('Skipping processing...')
return
click_class = news['class']
# Update the clicked one.
old_p = model['preference'][click_class]
model['preference'][click_class] = float((1 - ALPHA) * old_p + ALPHA)
# Update not clicked classes.
for i, prob in model['preference'].items():
if not i == click_class:
model['preference'][i] = float((1 - ALPHA) * model['preference'][i])
print (PREFERENCE_MODEL_TABLE_NAME)
print (userId)
print (model['preference'])
db[PREFERENCE_MODEL_TABLE_NAME].replace_one({'userId':userId}, model, upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = task['text']
if text is None:
return
# get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
# Calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# Duplicated news. Ignore.
print "Duplicated news. Ignore."
return
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news.
title = task['title']
if title is None:
title = task['description']
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict) :
return
if ('userId' not in msg
or 'newsId' not in msg
or 'timestamp' not in msg):
return
userId = msg['userId']
newsId = msg['newsId']
# Update user's preference
db = mongodb_client.get_db()
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'userId': userId})
# If model not exists, create a new one
if model is None:
print 'Creating preference model for new user: %s' % userId
new_model = {'userId' : userId}
preference = {}
for i in news_classes.classes:
preference[i] = float(INITIAL_P)
new_model['preference'] = preference
model = new_model
print 'Updating preference model for new user: %s' % userId
# Update model using time decaying method
news = db[NEWS_TABLE_NAME].find_one({'digest': newsId})
print(news)
if (news is None
or 'class' not in news
or news['class'] not in news_classes.classes):
print news is None
print 'class' not in news
print news['class'] not in news_classes.classes
print 'Skipping processing...'
return
click_class = news['class']
# Update the clicked one.
old_p = model['preference'][click_class]
model['preference'][click_class] = float((1 - ALPHA) * old_p + ALPHA)
# Update not clicked classes.
for i, prob in model['preference'].iteritems():
if not i == click_class:
model['preference'][i] = float((1 - ALPHA) * model['preference'][i])
db[PREFERENCE_MODEL_TABLE_NAME].replace_one({'userId': userId}, model, upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = task['text']
if text is None:
return
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
# 第一行跳过，判断第一列其余位置有没有大于阈值的，
# 超过的话，说明是重复的文章
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
print "Duplicated news. Ignore."
return
# mongodb时间条件查找，需要datetime类型，因此将字符串类型转换为datetime
task['publishedAt'] = parser.parse(task['publishedAt'])
# classify news
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
# upsert=true，有的话直接覆盖，没有的话插入
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def test_basic():
"""Test MongoDB client basically"""
database = client.get_db('test')
database.test.drop()
assert database.test.count() == 0
database.test.insert({'test': 1})
assert database.test.count() == 1
database.test.drop()
assert database.test.count() == 0
print('test_basic passed!')
def getNewsSummariesForUser(user_id, page_num):
page_num = int(page_num)
begin_index = (page_num - 1) * NEWS_LIST_BATCH_SIZE
end_index = page_num * NEWS_LIST_BATCH_SIZE
# The final list of news to be returned.
sliced_news = []
if redis_client.get(user_id) is not None:
news_digests = pickle.loads(redis_client.get(user_id))
# If begin_index is out of range, this will return empty list;
# If end_index is out of range (begin_index is within the range), this
# will return all remaining news ids.
sliced_news_digests = news_digests[begin_index:end_index]
print sliced_news_digests
db = mongodb_client.get_db()
sliced_news = list(db[NEWS_TABLE_NAME].find(
{'digest': {
'$in': sliced_news_digests
}}))
else:
db = mongodb_client.get_db()
total_news = list(db[NEWS_TABLE_NAME].find().sort([
('publishedAt', -1)
]).limit(NEWS_LIMIT))
total_news_digests = map(lambda x: x['digest'], total_news)
redis_client.set(user_id, pickle.dumps(total_news_digests))
redis_client.expire(user_id, USER_NEWS_TIME_OUT_IN_SECONDS)
sliced_news = total_news[begin_index:end_index]
for news in sliced_news:
# Remove text field to save bandwidth.
del news['text']
if news['publishedAt'].date() == datetime.today().date():
news['time'] = 'today'
return json.loads(dumps(sliced_news))
def test_basic():
db = mongodb_client.get_db()
db[PREFERENCE_MODEL_TABLE_NAME].delete_many({"userId": "test_user"})
msg = {
"userId": "test_user",
"newsId": "test_news",
"timestamp": str(datetime.utcnow())
}
click_log_processor.handle_message(msg)
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'userId': 'test_user'})
assert model is not None
assert len(model['preference']) == NUM_OF_CLASSES
print('test_basic passed!')
def getNewsSummariesForUser(user_id,page_num):
page_num = int(page_num)
begin_index = (page_num - 1)*NEWS_LIST_BATCH_SIZE
end_index = page_num*NEWS_LIST_BATCH_SIZE
#The final list of news to be returnedself.
sliced_news=[]
if redis_client.get(user_id) is not None:
news_digest = pickle.loads(redis_client.get(user_id))
#if begin_index is out of range,this will return empty list;
#if end_index is out of range(begin_index is within the range),this will
#return all remaining news ids
sliced_news_digests = news_digest[begin_index:end_index]
print sliced_news_digests
db = mongodb_client.get_db()
sliced_news = list(db[NEWS_TABLE_NAME].find({'digest':{'$in':sliced_news_digests}}))
else:
db = mongodb_client.get_db()
total_news = list(db[NEWS_TABLE_NAME].find().sort([('publishedAt',-1)]).limit(NEWS_LIMIT))
total_news_digests = map(lambda x:x['digest'],total_news)
redis_client.set(user_id,pickle.dumps(total_news_digests))
redis_client.expire(user_id,USER_NEWS_TIME_OUT_IN_SECONDS)
sliced_news = total_news[begin_index:end_index]
#Get preference for the user
#preference = news_recommendation_service_client.getPreferenceForUser(user_id)
#topPreference = None
#if preference is not None and len(preference) > 0:
# topPreference = preference[0]
for news in sliced_news:
del news['text']
if news['publishedAt'].date() == datetime.today().date():
news['time'] = 'today'
return json.loads(dumps(sliced_news));
def logNewsClickForUser(user_id, news_id):
LOG_CLICKS_TASK_QUEUE_URL = "amqp://*****:*****@emu.rmq.cloudamqp.com/evvloemh"
LOG_CLICKS_TASK_QUEUE_NAME = "LOG_CLICKS_TASK_QUEUE"
cloudAMQP_client = CloudAMQPClient(LOG_CLICKS_TASK_QUEUE_URL, LOG_CLICKS_TASK_QUEUE_NAME)
message = {'userId': user_id, 'newsId': news_id, 'timestamp': datetime.utcnow()}
db = mongodb_client.get_db()
db[CLICK_LOGS_TABLE_NAME].insert(message)
# Send log task to machine learning service for prediction
message = {'userId': user_id, 'newsId': news_id, 'timestamp': str(datetime.utcnow())}
cloudAMQP_client.sendMessage(message);
def test_basic():
db = client.get_db('test')
# drop test table and guarantee the cleaness of db
db.test.drop()
assert db.test.count() == 0
db.test.insert({'test': 1})
assert db.test.count() == 1
db.test.drop()
assert db.test.count() == 0
print('test_basic passed!')
def getPreferenceForUser(self, user_id):
db = mongodb_client.get_db()
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'user_id': user_id})
#no user in the database
if not model:
return []
sorted_tuples = sorted(model['preference'].items(), key=operator.itemgetter(1), reverse=True)
sorted_list = [item[0] for item in sorted_tuples]
sorted_value_list = [item[1] for item in sorted_tuples]
#make no sense
if isclose(float(sorted_value_list[0]), float(sorted_value_list[-1])):
return []
return sorted_list
def test_basic():
db = mongodb_client.get_db()
db[PREFERENCE_MODEL_TABLE_NAME].delete_many({"userId": "test_user"})
msg = {"userId": "test_user", "newsId": "test_news", "timestamp": str(datetime.utcnow())}
click_log_processor.handle_message(msg)
model = db[PREFERENCE_MODEL_TABLE_NAME].find_one({'userId': 'test_user'})
assert model is not None
assert len(model['preference']) == NUM_OF_CLASSES
print 'test_basic passed!'
def handle_message(msg):
if not isinstance(msg, dict):
logger.warning('message is broken')
return
text = msg['text']
if text is None:
return
# Get all recent news based on publishedAt
published_at = parser.parse(msg['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
logger.debug("Pairwise Sim:%s", str(pairwise_sim))
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logger.info("Duplicate news. Ignore!")
return
msg['publishedAt'] = parser.parse(msg['publishedAt'])
description = msg['description']
if description is None:
description = msg['title']
topic = news_topic_modeling_service_client.classify(description)
msg['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': msg['digest']},
msg,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = task['text']
if text is None:
return
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
print "Duplicated news. Ignore."
return
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news
title = task['title']
if title is not None:
# Need to uncomment these this line to call Machine Learning Server to get topic
# topic = news_topic_modeling_service_client.classify(title)
# task['class'] = topic
task['class'] = "Politics"
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
LOGGING_NEWS_DEDUPER.info('[x] Insert %s into MongoDB' % (task['title']))
def getNewsSummariesForUser(user_id, page_num):
page_num = int(page_num)
begin_index = (page_num - 1) * NEWS_LIST_BATCH_SIZE
end_index = page_num * NEWS_LIST_BATCH_SIZE
slice_news = []
#redis to store user_id : digestList
#for bson bson.dumps()
if redis_client.get(user_id):
#pickle.loads() from string to python object
total_news_digest = pickle.loads(redis_client.get(user_id))
slice_news_digest = total_news_digest[begin_index:end_index]
db = mongodb_client.get_db()
slice_news = db[NEWS_TABLE_NAME].find(
{'digest': {
'$in': slice_news_digest
}})
else:
db = mongodb_client.get_db()
total_news = list(db[NEWS_TABLE_NAME].find().sort([
('publishedAt', -1)
]).limit(NEWS_LIMIT))
total_news_digest = [news['digest'] for news in total_news]
redis_client.set(user_id, pickle.dumps(total_news_digest))
redis_client.expire(user_id, USER_NEWS_TIME_OUT_IN_SECONDES)
slice_news = total_news[begin_index:end_index]
#bson.dumps change from bson to json
preferences = news_recommandation_client.getPreferenceForUser(user_id)
#add the topPreference & today news
topPreference = None
if preferences and len(preferences) > 0:
topPreference = preferences[0]
today_date = str(datetime.now().date())
for news in slice_news:
if 'class' in news and news['class'] == topPreference:
news['reason'] = 'Recommand'
if today_date in str(news['publishedAt']):
news['time'] = 'today'
return json.loads(dumps(slice_news))
def test_basic():
print('tst0 pass')
db = client.get_db('tap-news')
db.test.drop()
assert db.test.count() == 0
print('tst0 pass')
db.test.insert({'test': 1})
assert db.test.count() == 1
print('tst1 pass')
db.test.drop()
assert db.test.count() == 0
print('tst2 pass')
def test_basic():
"""Test function"""
try:
database = client.get_db('test')
database.test.drop()
assert database.test.count() == 0
database.test.insert({"test": 1})
assert database.test.count() == 1
database.test.drop()
assert database.test.count() == 0
print('test_basic passed.')
except AssertionError as err:
print("test failed!\n")
raise err
def test_handle_message_basic():
db = mongodb_client.get_db()
test_msg_1 = {
"source": "Test 1",
"title": "Test 1",
"publishedAt": "2018-03-17T18:42:00Z",
"digest":"test1",
"text":"this is a test."
}
test_msg_2 = {
"source": "Test 2",
"title": "Test 2",
"publishedAt": "2018-03-17T23:18:00Z",
"digest":"test2",
"text":"is this a test?"
}
test_msg_3 = {
"source": "Test 3",
"title": "Test 3",
"publishedAt": "2018-03-17T23:18:00Z",
"digest":"test3",
"text":"this is a new test!"
}
none_message = None
db[NEWS_TABLE_NAME].insert(test_msg_1)
count = db[NEWS_TABLE_NAME].count()
news_deduper.handle_message(none_message)
count_1 = db[NEWS_TABLE_NAME].count()
assert count_1 == count
print("null check passed")
news_deduper.handle_message(test_msg_1)
count_2 = db[NEWS_TABLE_NAME].count()
assert count_2 == count
print("duplicate check passed")
news_deduper.handle_message(test_msg_2)
count_3 = db[NEWS_TABLE_NAME].count()
assert count_3 == count
news_deduper.handle_message(test_msg_3)
count_4 = db[NEWS_TABLE_NAME].count()
assert count_4 == count + 1
print("handle_message test passed")
db[NEWS_TABLE_NAME].remove({"title": "Test 1"})
db[NEWS_TABLE_NAME].remove({"title": "Test 2"})
db[NEWS_TABLE_NAME].remove({"title": "Test 3"})
def handle_message(msg):
# print('dedupter handling message', msg)
if msg is None or not isinstance(msg, dict):
print('News Deduper: message is broken')
return
task = msg
if 'text' not in task or not task['text']:
print('News Deduper publishedAt, not containing text')
return
if 'publishedAt' not in task or not task['publishedAt']:
raise NotContainPublishTimeError
published_at = parser.parse(task['publishedAt'])
day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day,
0, 0, 0, 0)
day_end = day_begin + datetime.timedelta(days=1)
news_collection = mongodb_client.get_db(DB_NAME).get_collection(COLLECTION_NAME)
news_on_the_day = news_collection.find({
'publishedAt': {'$gte': day_begin, '$lt': day_end}
})
documents = [task['text']]
documents.extend(news['text'] for news in news_on_the_day)
tf_idf = TfidfVectorizer().fit_transform(documents)
similarity_matrix = tf_idf * tf_idf.T
# print('News Deduper', similarity_matrix)
num_rows = similarity_matrix.shape[0]
if any(similarity_matrix[0, i] > NEWS_SIMILARITY_THRESHOLD for i in range(1, num_rows)):
print('News Deduper: similar document, throw it away')
return
# reformat the published date
task['publishedAt'] = published_at
# print('putting into database', task)
# TODO: feature extraction should be same in backfill procedure
# TODO actually should set another queue for classification
if 'title' in task:
try:
task['category'] = classifier_client.classify(task['title'])
except Exception as e:
print("News Deduper: failed to classify using the classifier client", e)
news_collection.replace_one({'digest': task['digest']}, task, upsert=True)
def basic_test():
"""Basic test"""
database = client.get_db()
database.news.drop()
assert database.news.count() == 0
news_deduper.handle_message(MESSAGE_1)
assert database.news.count() == 1
news_deduper.handle_message(MESSAGE_2)
assert database.news.count() == 1
news_deduper.handle_message(MESSAGE_3)
assert database.news.count() == 1
database.news.drop()
assert database.news.count() == 0
print('Basic test for deduper passed.')
def logNewsClickForUser(user_id, news_id, user_agent, news_category):
print '[logNewsClickForUser]\n'
print 'user_id:', user_id
print 'news_id:', news_id
print 'user_agent:', user_agent
print 'news_category:', news_category
# signup
# user_agent
update_user_agent(user_agent)
# news category
update_news_category(news_category)
message = {
'userId': user_id,
'newsId': news_id,
'timestamp': datetime.utcnow()
}
db = mongodb_client.get_db()
# save all log
db[CLICK_LOGS_TABLE_NAME].insert(message)
# save daily log
day_click_logs_table_name = CLICK_LOGS_TABLE_NAME + datetime.today(
).strftime('_%Y-%m-%d')
print 'table: ' + day_click_logs_table_name
db[day_click_logs_table_name].insert(message)
# count clickinng number evey hour
update_hour_clicking_number()
# update_daily_active_users
update_daily_active_users(user_id)
# update user freq
update_daily_active_users_freq(user_id)
# update item freq
update_daily_active_news_freq(news_id)
# Send log task to machine learning service for prediction
message = {
'userId': user_id,
'newsId': news_id,
'timestamp': str(datetime.utcnow())
}
cloudAMQP_client.send_message(message)
def test_basic():
#db=client.get_db('test') #这两句是等价的
db = client.get_db()['test']
db.test.drop()
assert db.test.count() == 0
db.test.insert_one({'test': 1})
assert db.test.count() == 1
db.test.drop()
assert db.test.count() == 0
print('test basic pass')
def getChatHistory(event_id):
if event_id is None:
print "None"
return
if redis_client.get(event_id) is not None:
chat_list = pickle.loads(redis_client.get(event_id))
else:
db = mongodb_client.get_db()
chat_list = list(db['chat'].find({
"event_id": event_id
}).sort([('time', -1)]))
redis_client.set(event_id, pickle.dumps(chat_list))
redis_client.expire(event_id, 60) # 60s
return json.loads(dumps(chat_list))
def test_basic():
# clear test documents
db = client.get_db('test')
db.test.drop()
assert db.test.count() == 0
db.test.insert({'test': 1})
assert db.test.count() == 1
db.test.drop()
assert db.test.count() == 0
print 'test_basic passed.'
import os
import sys
# classify news in mongodb to a specific class
# import common package in parent directory
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
import mongodb_client
import news_topic_modeling_service_client
if __name__ == '__main__':
db = mongodb_client.get_db()
cursor = db['news'].find({})
count = 0
for news in cursor:
count += 1
print count
if 'class' not in news:
print 'Populating classes...'
description = news['description']
if description is None:
description = news['title']
topic = news_topic_modeling_service_client.classify(description)
news['class'] = topic
db['news-test'].replace_one({'digest': news['digest']}, news, upsert=True)