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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Newbe´s question
Date Mon, 24 Aug 2009 19:00:19 GMT
That's probably the best option at the moment.  Once you're familiar
with the thrift API I'm sure the lazyboy devs would welcome updates
too.

-Jonathan

On Mon, Aug 24, 2009 at 1:54 PM, Bruno Couto<bcouto@gmail.com> wrote:
> Thanks for helpping me Jonathan!
>
> Well, now I know that I can´t use the Lazyboy, then I will try my
> first steps using the Cassandra trunk version and thrift api whitout a
> wrapper.
>
>
> On Mon, Aug 24, 2009 at 2:41 PM, Jonathan Ellis<jbellis@gmail.com> wrote:
>> lazyboy works vs an earlier version of trunk, so it's already
>> incompatible with 0.3, but not yet compatible w/ latest 0.4 :)
>>
>> On Mon, Aug 24, 2009 at 12:28 PM, Bruno Couto<bcouto@gmail.com> wrote:
>>> Jonathan,
>>>
>>>
>>> First, thanks for answering so fast.
>>> I´m using version 0.3-final of Cassandra, then I believe the api
>>> version 0.4 is not the problem, am I correct?
>>> I'll look for the null problem.
>>>
>>>
>>> Bruno Couto
>>>
>>>
>>> On Mon, Aug 24, 2009 at 11:50 AM, Jonathan Ellis<jbellis@gmail.com> wrote:
>>>> There's two things going on here, I think.
>>>>
>>>> One is that you're passing a null where there shouldn't be one.  This
>>>> is a thrift bug and will be addressed in the next beta.
>>>>
>>>> The other is that IIRC lazyboy needs to be updated to work with the
>>>> latest 0.4 api.
>>>>
>>>> -Jonathan
>>>>
>>>> On Mon, Aug 24, 2009 at 9:09 AM, Bruno Couto<bcouto@gmail.com> wrote:
>>>>> Hi Guys,
>>>>>
>>>>> my name is Bruno and I'm from Brazil, first, sorry for my bad english.
>>>>> I'm in my first steps with cassandra, and I´m trying to use Lazyboy
>>>>> (python wrapper).
>>>>> But when I run the layzyboy columnfamily.py example, I get the
>>>>> following error messages.
>>>>> Someone with more experience could help me?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Bruno Couto.
>>>>>
>>>>>
>>>>> ----
>>>>>
>>>>> Cassandra Error Message:
>>>>>
>>>>> DEBUG - batch_insert
>>>>> ERROR - Internal error processing batch_insert
>>>>> java.lang.NullPointerException
>>>>>        at org.apache.cassandra.db.RowMutation.getRowMutation(RowMutation.java:284)
>>>>>        at org.apache.cassandra.service.CassandraServer.batch_insert(CassandraServer.java:318)
>>>>>        at org.apache.cassandra.service.Cassandra$Processor$batch_insert.process(Cassandra.java:968)
>>>>>        at org.apache.cassandra.service.Cassandra$Processor.process(Cassandra.java:807)
>>>>>        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:252)
>>>>>        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>>>>>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>>>>>        at java.lang.Thread.run(Thread.java:619)
>>>>> DEBUG - Disseminating load info ...
>>>>>
>>>>> ----
>>>>>
>>>>> Python Error Message:
>>>>>
>>>>> localhost ~ # python columnfamily.py
>>>>> {'table': 'UserData', 'superkey': None, 'key':
>>>>> '3a63b82a947d4ee1a8cbee45944b5dcb', 'family': 'Users', 'supercol':
>>>>> None}
>>>>> {'username': 'ieure', 'email': 'ian@digg.com'}
>>>>> True
>>>>> Traceback (most recent call last):
>>>>>  File "columnfamily.py", line 65, in <module>
>>>>>    u.save()           # -> {'username': 'ieure', 'email': 'ian@digg.com'}
>>>>>  File "/root/columnfamily.py", line 119, in save
>>>>>
>>>>>  File "build/bdist.linux-i686/egg/lazyboy/connection.py", line 106,
in func
>>>>> lazyboy.exceptions.ErrorThriftMessage: Internal error processing batch_insert
>>>>>
>>>>> ----
>>>>>
>>>>> ColumnFamily.py
>>>>>
>>>>> # -*- coding: utf-8 -*-
>>>>> #
>>>>> # Lazyboy examples
>>>>> #
>>>>> # © 2009 Digg, Inc. All rights reserved.
>>>>> # Author: Ian Eure <ian@digg.com>
>>>>> #
>>>>> # This example assumes the following schema:
>>>>> #
>>>>> # <Tables>
>>>>> #     <Table Name="UserData">
>>>>> #         <ColumnFamily ColumnSort="Name" Name="Users"/>
>>>>> #     </Table>
>>>>> # </Tables>
>>>>> #
>>>>>
>>>>>
>>>>> from lazyboy import *
>>>>>
>>>>>
>>>>> # Define your cluster(s)
>>>>> connection.add_pool('UserData', ['localhost:9160'])
>>>>>
>>>>>
>>>>> # Subclass ColumnFamily to create an object of the correct type.
>>>>> class User(columnfamily.ColumnFamily):
>>>>>    """A class representing a user in Cassandra."""
>>>>>
>>>>>    # _key is the key template. It's values are given to
>>>>>    # PrimaryKey.__init__ as keyword arguments any time a PK is
>>>>>    # instantiated for this object.
>>>>>    _key = {'table': 'UserData',        # The table to store in
>>>>>            'family': 'Users'}          # The ColumnFamily
name to store on
>>>>>
>>>>>    # Anything in here _must_ be set before the object is saved
>>>>>    _required = ('username',)
>>>>>
>>>>>
>>>>> # Create an empty object
>>>>> u = User()
>>>>>
>>>>> # A PrimaryKey is generated for you:
>>>>> print u.pk
>>>>> # -> {'table': 'UserData', 'superkey': None,
>>>>> #     'key': 'da6c8e19174f40cfa6d0b65a08eef62f',
>>>>> #     'family': 'Users', 'supercol': None}
>>>>>
>>>>> data = {'username': 'ieure', 'email': 'ian@digg.com'}
>>>>>
>>>>> # The object is a dict. All these are equivalent.
>>>>> u.update(data)
>>>>> u.update(data.items())
>>>>> u.update(**data)
>>>>> for k in data:
>>>>>    u[k] = data[k]
>>>>>
>>>>> # Arguments to __init__ are passed to update()
>>>>> u = User(data)
>>>>> print u            # -> {'username': 'ieure', 'email': 'ian@digg.com'}
>>>>>
>>>>> # You can see if it's been modified.
>>>>> print u.is_modified()           # -> True
>>>>>
>>>>> # Save to Cassandra
>>>>> u.save()           # -> {'username': 'ieure', 'email': 'ian@digg.com'}
>>>>>
>>>>> print u.is_modified()           # -> False
>>>>>
>>>>> # Load it in a new instance.
>>>>> u_ = User().load(u.pk.key)
>>>>> print u_           # -> {'username': 'ieure', 'email': 'ian@digg.com'}
>>>>>
>>>>> print u.is_modified()           # -> False
>>>>> del u['username']
>>>>> print u.valid()                 # -> False
>>>>> print u.missing()               # -> ('username',)
>>>>> try:
>>>>>    u.save()        # -> ('Missing required field(s):', ('username',))
>>>>> except Exception, e:
>>>>>    print e
>>>>>
>>>>> # Discard modifications
>>>>> u.revert()
>>>>> print u.is_modified()           # -> False
>>>>> print u.valid()                 # -> True
>>>>>
>>>>
>>>
>>
>

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