Sylvain,

Interesting, when I look at the actual bytes returned, I see the byte array is prefixed with the keyspace and table name.

I assume I'm doing something wrong in the select.  Am I incorrectly using the ResultSet?

-brian

On Thu, Apr 11, 2013 at 9:09 AM, Brian O'Neill <bone@alumni.brown.edu> wrote:
Yep, it worked like a charm.  (PreparedStatement avoided the hex conversion)

But now, I'm seeing a few extra bytes come back in the select….
(I'll keep digging, but maybe you have some insight?)

I see this:

ERROR [2013-04-11 13:05:03,461] com.skookle.dao.RepositoryDao: repository.add() byte.length()=[259804]

ERROR [2013-04-11 13:08:08,487] com.skookle.dao.RepositoryDao: repository.get() [foo.jpeg] byte.length()=[259861]


(Notice the length's don't match up)

Using this code:

    public void addContent(String key, byte[] data)

            throws NoHostAvailableException {

        LOG.error("repository.add() byte.length()=[" + data.length + "]");

        String statement = "INSERT INTO " + KEYSPACE + "." + TABLE + "(key, data) VALUES (?, ?)";

        PreparedStatement ps = session.prepare(statement);

        BoundStatement bs = ps.bind(key, ByteBuffer.wrap(data));

        session.execute(bs);

    }


    public byte[] getContent(String key) throws NoHostAvailableException {

        Query select = select("data").from(KEYSPACE, TABLE).where(eq("key", key));

        ResultSet resultSet = session.execute(select);

        byte[] data = resultSet.one().getBytes("data").array();

        LOG.error("repository.get() [" + key + "] byte.length()=[" + data.length + "]");

        return data;

    }


---

Brian O'Neill

Lead Architect, Software Development

Health Market Science

The Science of Better Results

2700 Horizon Drive  King of Prussia, PA  19406

M: 215.588.6024 @boneill42    

healthmarketscience.com


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From: Sylvain Lebresne <sylvain@datastax.com>
Reply-To: <user@cassandra.apache.org>
Date: Thursday, April 11, 2013 8:48 AM
To: "user@cassandra.apache.org" <user@cassandra.apache.org>
Cc: Gabriel Ciuloaica <gciuloaica@gmail.com>
Subject: Re: Blobs in CQL?


Hopefully, the prepared statement doesn't do the conversion.

It does not.
 
(I'm not sure if it is a limitation of the CQL protocol itself)

thanks again,
-brian



---
Brian O'Neill
Lead Architect, Software Development
Health Market Science
The Science of Better Results
2700 Horizon Drive • King of Prussia, PA • 19406
M: 215.588.6024 • @boneill42 <http://www.twitter.com/boneill42>  •
healthmarketscience.com

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On 4/11/13 8:34 AM, "Gabriel Ciuloaica" <gciuloaica@gmail.com> wrote:

>I'm not using the query builder but the PreparedStatement.
>
>Here is the sample code: https://gist.github.com/devsprint/5363023
>
>Gabi
>On 4/11/13 3:27 PM, Brian O'Neill wrote:
>> Great!
>>
>> Thanks Gabriel.  Do you have an example? (are using QueryBuilder?)
>> I couldn't find the part of  the API that allowed you to pass in the
>>byte
>> array.
>>
>> -brian
>>
>> ---
>> Brian O'Neill
>> Lead Architect, Software Development
>> Health Market Science
>> The Science of Better Results
>> 2700 Horizon Drive € King of Prussia, PA € 19406
>> M: 215.588.6024 € @boneill42 <http://www.twitter.com/boneill42>  €
>> healthmarketscience.com
>>
>> This information transmitted in this email message is for the intended
>> recipient only and may contain confidential and/or privileged material.
>>If
>> you received this email in error and are not the intended recipient, or
>> the person responsible to deliver it to the intended recipient, please
>> contact the sender at the email above and delete this email and any
>> attachments and destroy any copies thereof. Any review, retransmission,
>> dissemination, copying or other use of, or taking any action in reliance
>> upon, this information by persons or entities other than the intended
>> recipient is strictly prohibited.
>>
>>
>>
>>
>>
>>
>>
>> On 4/11/13 8:25 AM, "Gabriel Ciuloaica" <gciuloaica@gmail.com> wrote:
>>
>>> Hi Brian,
>>>
>>> I'm using the blobs to store images in cassandra(1.2.3) using the
>>> java-driver version 1.0.0-beta1.
>>> There is no need to convert a byte array into hex.
>>>
>>> Br,
>>> Gabi
>>>
>>> On 4/11/13 3:21 PM, Brian O'Neill wrote:
>>>> I started playing around with the CQL driver.
>>>> Has anyone used blobs with it yet?
>>>>
>>>> Are you forced to convert a byte[] to hex?
>>>> (e.g. I have a photo that I want to store in C* using the java-driver
>>>> API)
>>>>
>>>> -brian
>>>>
>>>> --
>>>> Brian ONeill
>>>> Lead Architect, Health Market Science (http://healthmarketscience.com)
>>>> mobile:215.588.6024
>>>> blog: http://brianoneill.blogspot.com/
>>>> twitter: @boneill42
>>
>






--
Brian ONeill
Lead Architect, Health Market Science (http://healthmarketscience.com)

mobile:215.588.6024
blog: http://brianoneill.blogspot.com/
twitter: @boneill42