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# ContentDB
# Copyright (C) 2020 rubenwardy
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from flask import Blueprint, make_response
from app.models import Package, PackageRelease, db, User, UserRank, PackageState
from sqlalchemy.sql.expression import func
bp = Blueprint("metrics", __name__)
def generate_metrics(full=False):
def write_single_stat(name, help, type, value):
fmt = "# HELP {name} {help}\n# TYPE {name} {type}\n{name} {value}\n\n"
return fmt.format(name=name, help=help, type=type, value=value)
def gen_labels(labels):
pieces = [key + "=" + str(val) for key, val in labels.items()]
return (",").join(pieces)
def write_array_stat(name, help, type, data):
ret = ("# HELP {name} {help}\n# TYPE {name} {type}\n") \
.format(name=name, help=help, type=type)
for entry in data:
assert(len(entry) == 2)
ret += ("{name}{{{labels}}} {value}\n") \
.format(name=name, labels=gen_labels(entry[0]), value=entry[1])
return ret + "\n"
downloads_result = db.session.query(func.sum(Package.downloads)).one_or_none()
downloads = 0 if not downloads_result or not downloads_result[0] else downloads_result[0]
packages = Package.query.filter_by(state=PackageState.APPROVED).count()
users = User.query.filter(User.rank != UserRank.NOT_JOINED).count()
ret = ""
ret += write_single_stat("contentdb_packages", "Total packages", "counter", packages)
ret += write_single_stat("contentdb_users", "Number of registered users", "counter", users)
ret += write_single_stat("contentdb_downloads", "Total downloads", "counter", downloads)
if full:
scores = Package.query.join(User).with_entities(User.username, Package.name, Package.score) \
.filter(Package.state==PackageState.APPROVED).all()
ret += write_array_stat("contentdb_package_score", "Package score", "gauge", \
[({ "author": score[0], "name": score[1] }, score[2]) for score in scores])
else:
score_result = db.session.query(func.sum(Package.score)).one_or_none()
score = 0 if not score_result or not score_result[0] else score_result[0]
ret += write_single_stat("contentdb_score", "Total package score", "gauge", score)
return ret
@bp.route("/metrics")
def metrics():
response = make_response(generate_metrics(), 200)
response.mimetype = "text/plain"
return response
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