CODEWITHSUNDEEP
pythondatabasezodb
PythonFan
PythonFan

Reputation: 78

ZODB / ZEO . Connecting to server from client

Basically I can use ZODB fine. However the ZEO tutorials are all very confusing.

From my understanding you start a server by going into my directory and punchign into the command prompt

python runzeo.py -C zeo.config

Where my zeo.config file is as follows

<zeo>
  address localhost:8090
</zeo>

<filestorage>
  path C:\\Anaconda\\Lib\\site-packages\\ZEO\\var\\tmp\\Data.fs
</filestorage>

<eventlog>
  <logfile>
    path C:\\Anaconda\\Lib\\site-packages\\ZEO\\var\\tmp\\zeo.log
    format %(asctime)s %(message)s
  </logfile>
</eventlog>

When I run it the log file is filled with 

2014-07-02T14:49:15 (1948) opening storage '1' using FileStorage
2014-07-02T14:49:15 StorageServer created RW with storages:     1:RW:C:\\Anaconda\\Lib\\site-packages\\ZEO\\var\\tmp\\Data.fs
2014-07-02T14:49:15 (1948) listening on ('localhost', 8090)

Now when I try to get a client to add some random stuff to the database with prints after every line to see how its going:

from ZEO.ClientStorage import ClientStorage
from ZODB import DB
import transaction


print "starting"
storage=ClientStorage(('localhost',8090))
print "storage opened"
db=DB(storage)
conn=db.open()
print "connection opened" 
root=conn.root()
print "established connection"
root['letters']=['a','b','c']
print "added values"
transaction.commit()
print "transaction done"
root.close()
print "closed"

My code only prints "starting", no error messages are thrown, so Im assuming that its getting stuck on the storage = ClientStorange(('localhost',8090)) line, my Data.fs file remains unchanged. I have no idea what is wrong and I have consulted all the tutorials.

I'm on Windows using Python 2.7 and installed ZEO / ZODB from pip so I assume they are all up to date versions is that helps.

Any help or pointers to different object orientated databases (with multiple proccess access) would be appreciated.

Thanks everyone

Upvotes: 3

Views: 930

Answers (1)

PythonFan
PythonFan

Reputation: 78

Found the answer to my own question. Seems there is a bug with the implementation of using the localhost in windows. (Running server and client on same machine)

The source code needs an edit:

I have the same problem (can't connect to ZEO Server) using ZODB/ZEO 4.0 with Python 2.7.6 on Windows.

The proposed solution (changing line 446 of ZEO/zrpc/client.py) works for me, so why not incorporate the patch into the 4.0 release too?

- socket.getaddrinfo(host or 'localhost', port)
+ socket.getaddrinfo(host or 'localhost', port, 0, socket.SOCK_STREAM)"

From https://bugs.launchpad.net/zodb/+bug/1004513

Upvotes: 2

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