Stomp logger using lock

logger.py

#!/usr/bin/python
from stompy.simple import Client
from flask import Flask
app = Flask(__name__)

lock = Lock()

@app.route("/")
def route():
    yield from lock
    try:
        with open(LOGFILE, 'r') as f:
            return f.read()
    finally:
        lock.release()

# stomp_creds connection credentials
stomp_creds = {
    "host" : "sjmf.in",
    "port" : 61613,
    "queue": "/topic/fridgeprint",
    "user" : "fridgeprint",
    "pass" : "Where's my fucking Milk?"
}

LOGFILE = "./fridgeprint_msgs.log"

conn = Client(host=stomp_creds['host'], port=stomp_creds['port'])

def main():
    conn.connect(username=stomp_creds['user'], password=stomp_creds['pass'])
    conn.subscribe(stomp_creds['queue'])

    msg = conn.get()
    while msg:
        yield from lock
        try:
            with open(LOGFILE, 'a+') as f:
                f.write(str(json.loads(msg.body)) + "\n")
        finally:
            lock.release()
        msg = conn.get()

if __name__ == "__main__":
    try:
        app.run()
        main()
    except KeyboardInterrupt:
        conn.disconnect()
        print "Exiting :)"