def predict():
project_id = os.environ['GCLOUD_PROJECT']
tracer = initialize_tracer()
tracer = app.config['TRACER']
tracer.start_span(name='summarize')
text = request.get_data()
topic = request.args.get('topic')
# if not topic:
# return jsonify({"error": "no topic present"}), 400
if not text.strip():
return jsonify({"error": "empty text"}), 400
summary, accuracy = model.summarize(text, topic)
health()
log(str(summary), "summary")
js = json.dumps({
"summary": summary,
"accuracy": accuracy,
"text": str(text)
})
result = "Tracing requests"
tracer.end_span()
return jsonify(js)
def home():
logtracer = app.config['TRACER']
tracer.start_span(name='home')
log("home dir", "root")
result = "Tracing requests"
tracer.end_span()
return 'Text summarizer service. Please use /summarize'
def health():
tracer = app.config['TRACER']
tracer.start_span(name='health')
log("alive", "health_check")
result = "Tracing requests"
tracer.end_span()
return 'alive', 200 #, requests
async def middleware(request, handler):
if handler.__name__ == "health_check":
return await handler(request)
span = None
tracer = None
try:
propagator = google_cloud_format.GoogleCloudFormatPropagator()
span_context = propagator.from_headers(request.headers)
tracer = initialize_tracer(project_id, span_context, propagator)
span = tracer.start_span()
span.name = handler.__name__
tracer.add_attribute_to_current_span(HTTP_HOST, request.host)
tracer.add_attribute_to_current_span(HTTP_METHOD, request.method)
tracer.add_attribute_to_current_span(HTTP_PATH, request.path)
tracer.add_attribute_to_current_span(HTTP_URL, str(request.url))
request["trace_header"] = propagator.to_headers(span_context)
except: # NOQA
logging.exception("Could not initialize the tracer")
try:
response = await handler(request)
if tracer:
tracer.add_attribute_to_current_span(HTTP_STATUS_CODE,
response.status)
return response
finally:
if tracer:
tracer.end_span()
def index():
tracer = app.config['TRACER']
tracer.start_span(name='index')
result = "Tracing requests"
tracer.end_span()
return result
def write():
tracer = app.config['TRACER']
tracer.start_span(name='write')
url = "http://db-write/write/" + trace_id
result = requests.get(url)
tracer.end_span()
return result.content
def read(name):
tracer = app.config['TRACER']
tracer.start_span(name='read')
url = "http://db-read/read/" + trace_id + "/" + name
result = requests.get(url)
tracer.end_span()
return result.content
def dump():
tracer = app.config['TRACER']
tracer.start_span(name='dump')
url = "http://db-dump/dump/" + trace_id
result = requests.get(url)
tracer.end_span()
return result.content
def index():
tracer.start_span(name='index')
# Add up to 1 sec delay, weighted toward zero
time.sleep(random.random()**2)
result = "Tracing requests"
tracer.end_span()
return result
def dump(trace_id):
conn = connect()
tracer = initialize_tracer(project_id, trace_id)
app.config['TRACER'] = tracer
tracer.start_span(name='database')
db_content = select(conn)
tracer.end_span()
db_content_to_print = format(db_content)
return render_page(db_content_to_print)
def index():
tracer = app.config['TRACER']
tracer.start_span(name='index')
# Add up to 1 sec delay, weighted toward zero
time.sleep(random.random() ** 2)
result = "Tracing requests"
tracer.end_span()
return result
def insert(trace_id):
conn = connect()
tracer = initialize_tracer(project_id, trace_id)
app.config['TRACER'] = tracer
table = os.environ['TABLE']
name = names[randint(0, 14)]
surname = surnames[randint(0, 14)]
tracer = app.config['TRACER']
tracer.start_span(name='database')
db_content = write(conn, table, name, surname)
tracer.end_span()
db_content_to_print = format(db_content)
return render_page(db_content_to_print)
def trace(service_color):
tracer = app.config['TRACER']
tracer.start_span(name='trace')
headers = {}
## For Propagation test ##
# Call service 'green' from service 'blue'
if (os.environ['SERVICE_NAME']) == 'blue':
for header in TRACE_HEADERS_TO_PROPAGATE:
if header in request.headers:
headers[header] = request.headers[header]
ret = requests.get("http://localhost:9000/trace/green",
headers=headers)
# Call service 'red' from service 'green'
elif (os.environ['SERVICE_NAME']) == 'green':
for header in TRACE_HEADERS_TO_PROPAGATE:
if header in request.headers:
headers[header] = request.headers[header]
ret = requests.get("http://localhost:9000/trace/red", headers=headers)
result = render_page()
tracer.end_span()
return result
def log(message, log_name):
# [START logging_quickstart]
# Imports the Google Cloud client library
logtracer = app.config['TRACER']
tracer.start_span(name='log')
from google.cloud import logging
# Instantiates a client
logging_client = logging.Client()
# The name of the log to write to
# Selects the log to write to
logger = logging_client.logger(str(log_name))
# The data to log
# Writes the log entry
logger.log_text(message)
print('Logged: {}'.format(message))
# [END logging_quickstart]
result = "Tracing requests"
tracer.end_span()
def service(service_color):
tracer = app.config['TRACER']
tracer.start_span(name='service')
result = render_page()
tracer.end_span()
return result
