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April 25, 2020 21:44
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Playing our with asyncpg and the hydra build server
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let | |
pkgs = import <nixpkgs> {}; | |
python = pkgs.python3; | |
sqlacodegen = python.pkgs.buildPythonApplication rec { | |
pname = "sqlacodegen"; | |
version = "2.1.0"; | |
src = python.pkgs.fetchPypi { | |
inherit pname version; | |
sha256 = "0z0hh7lcfhw5n0zjn1v1anmkfkidalsa4d9xakcqvkixdkimiqpa"; | |
}; | |
propagatedBuildInputs = with python.pkgs; [ | |
setuptools_scm | |
inflect | |
sqlalchemy | |
]; | |
}; | |
in | |
python.pkgs.buildPythonPackage { | |
name = "asdf"; | |
src = null; | |
propagatedBuildInputs = with python.pkgs; [ | |
sqlalchemy | |
psycopg2 | |
asyncpg | |
]; | |
nativeBuildInputs = with python.pkgs; [ | |
ipython | |
sqlacodegen | |
]; | |
} |
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#! /usr/bin/env nix-shell | |
#! nix-shell -i python3 -p python37Packages.asyncpg | |
import asyncio | |
import asyncpg | |
async def main(): | |
conn = await asyncpg.connect() | |
for queue in [ | |
"build_finished", | |
"build_started", | |
"builds_added", | |
"builds_bumped", | |
"builds_cancelled", | |
"builds_deleted", | |
"builds_restarted", | |
"dump_status", | |
"eval_added", | |
"eval_cached", | |
"eval_failed", | |
"eval_started", | |
"jobset_scheduling_changed", | |
"jobset_shares_changed", | |
"jobsets_added", | |
"jobsets_deleted", | |
"status_dumped", | |
"step_finished", | |
"step_started", | |
]: | |
await conn.add_listener( | |
queue, | |
lambda connection, pid, channel, payload: print(channel, payload)) | |
asyncio.get_event_loop().run_until_complete(main()) | |
asyncio.get_event_loop().run_forever() |
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#! /usr/bin/env nix-shell | |
#! nix-shell -i python3 -p python3Packages.sqlalchemy python3Packages.psycopg2 python3Packages.asyncpg | |
from sqlalchemy.ext.automap import automap_base | |
from sqlalchemy.orm import Session | |
from sqlalchemy import create_engine, MetaData | |
import warnings | |
with warnings.catch_warnings(): | |
engine = create_engine("postgresql:///hydra") | |
warnings.simplefilter("ignore") | |
metadata = MetaData() | |
metadata.reflect(engine, only=['builds']) | |
Base = automap_base(metadata=metadata) | |
Base.prepare() | |
session = Session(engine) | |
asdf = session.query(Base.classes.builds).get(2) | |
print("SEMPF", asdf) | |
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