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websocket.py
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websocket.py
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import select
import psycopg2
import socketio
HOST_DB_TEST = "localhost"
POSTGRES_USER = "postgres"
POSTGRES_PASSWORD = "1234"
POSTGRES_DB = "bpe"
def listenForChanges():
try:
connection = psycopg2.connect(
host=HOST_DB_TEST,
database=POSTGRES_DB,
user=POSTGRES_USER,
password=POSTGRES_PASSWORD,
)
cursor = connection.cursor()
cursor.execute("LISTEN workspace_changes;")
print("Waiting for notifications on channel 'workspace_changes'")
while True:
if select.select([connection], [], [], 5) == ([], [], []):
print("Timeout")
else:
connection.poll()
connection.commit()
while connection.notifies:
notify = connection.notifies.pop(0)
print("Got NOTIFY:", notify.pid, notify.channel, notify.payload)
socketio.emit("workspace_changes", notify.payload)
except (Exception, psycopg2.Error) as error:
raise error