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Posted to dev@karaf.apache.org by Achim Nierbeck <bc...@googlemail.com> on 2014/12/22 18:07:36 UTC
Alternative backend for Decanter and some Shell stuff
Hi,
I worked on a showcase to embed a Apache Cassandra DB inside Apache Karaf
[1].
This could be used for either prototyping with Cassandra or as an
alternative backend for the Decanter project.
Additionally I played with some shell commands for easy debugging purposes,
for details take a look [2].
For example you're able to connect to any given Cassandra cluster issue
some CQL statements either from the command line or from a file.
Additionally I added some CQLSH like commands including completion for easy
usage of USE, CREATE, SELECT or INSERT statements. For this I needed to
alter the Karaf shell a bit (with the help of gnodet :-) ) To disable the
shell interpretation of quotes and brackets.
Now that I altered the handling in Karaf/GOGO shell in a custom Karaf [3],
the question is, can we port this back to Karaf in a way that we don't need
to alter the gogo shell stuff again and have our own classes [4]. Another
Idea that came to my mind was to have a stripped down shell that could be
used for any SQL-like command. A similar completion syntax could be used
for any SQL Select, not only for the CQL syntax of Cassandra.
regards, Achim
[1] - https://github.com/ANierbeck/Karaf-Cassandra
[2] -
https://blog.codecentric.de/en/2014/12/combining-apache-cassandra-apache-karaf/
[3] - https://github.com/ANierbeck/CustomKaraf
[4] - http://notizblog.nierbeck.de/2014/12/embedding-apache-cassandra/
--
Apache Member
Apache Karaf <http://karaf.apache.org/> Committer & PMC
OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer &
Project Lead
blog <http://notizblog.nierbeck.de/>
Co-Author of Apache Karaf Cookbook <http://bit.ly/1ps9rkS>
Software Architect / Project Manager / Scrum Master
Re: Alternative backend for Decanter and some Shell stuff
Posted by Achim Nierbeck <bc...@googlemail.com>.
Hi JB,
thanks for the feedback :-)
The solution right now, is using a special variable to disable the
resolving of brackets.
for easier understanding of my changes I added some markers to the source
code, and you'll find a diff at [1].
Regarding a specific instance of a special shell I would like to have that,
but I'm not that familiar with the shell code to start that.
regards, Achim
[1] - https://gist.github.com/ANierbeck/ec27838a728f1e29defc
2015-01-06 12:56 GMT+01:00 Jean-Baptiste Onofré <jb...@nanthrax.net>:
> Hi Achim,
>
> I thought I provided some update by e-mail, my bad (we just quickly
> discussed on IRC).
>
> For the "special characters", why not just using a variable in the session
> (like for the completion mode), and having a specific shell instantiated
> when the variable is there.
>
> I'm +1 on the specific shell in that case.
>
> Regards
> JB
>
>
> On 01/05/2015 06:44 PM, Achim Nierbeck wrote:
>
>> Hi,
>>
>> my guess is that it lacks of feedback due to the holidays, so I thought I
>> just bring this up one more time.
>> While adding the CQL Commands to my showcase I was in need to change the
>> way the current gogo-shell is handling brackets and other characters.
>> Now what would be the best to have those changes back in Karaf?
>> Right now it's just a flag set by the session that is interpreted by
>> specialized implementation of the standard gogo-shell classes.
>> This isn't really nice as it would cause code-duplication.
>> An alternative that Guillaume already mentioned to me on IRC would be to
>> have a specialized shell for these cases.
>> The benefit for this would be to have a shell capable of handling any kind
>> of SQL like syntax, the completers for it can be based on the ones I made
>> for CQL.
>>
>> I'm open to ideas :-)
>>
>> regards, Achim
>>
>>
>> 2014-12-22 18:07 GMT+01:00 Achim Nierbeck <bc...@googlemail.com>:
>>
>> Hi,
>>>
>>> I worked on a showcase to embed a Apache Cassandra DB inside Apache Karaf
>>> [1].
>>> This could be used for either prototyping with Cassandra or as an
>>> alternative backend for the Decanter project.
>>> Additionally I played with some shell commands for easy debugging
>>> purposes, for details take a look [2].
>>> For example you're able to connect to any given Cassandra cluster issue
>>> some CQL statements either from the command line or from a file.
>>> Additionally I added some CQLSH like commands including completion for
>>> easy usage of USE, CREATE, SELECT or INSERT statements. For this I needed
>>> to alter the Karaf shell a bit (with the help of gnodet :-) ) To disable
>>> the shell interpretation of quotes and brackets.
>>> Now that I altered the handling in Karaf/GOGO shell in a custom Karaf
>>> [3],
>>> the question is, can we port this back to Karaf in a way that we don't
>>> need
>>> to alter the gogo shell stuff again and have our own classes [4]. Another
>>> Idea that came to my mind was to have a stripped down shell that could be
>>> used for any SQL-like command. A similar completion syntax could be used
>>> for any SQL Select, not only for the CQL syntax of Cassandra.
>>>
>>>
>>> regards, Achim
>>>
>>> [1] - https://github.com/ANierbeck/Karaf-Cassandra
>>> [2] -
>>> https://blog.codecentric.de/en/2014/12/combining-apache-
>>> cassandra-apache-karaf/
>>> [3] - https://github.com/ANierbeck/CustomKaraf
>>> [4] - http://notizblog.nierbeck.de/2014/12/embedding-apache-cassandra/
>>>
>>> --
>>>
>>> Apache Member
>>> Apache Karaf <http://karaf.apache.org/> Committer & PMC
>>> OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer
>>> &
>>> Project Lead
>>> blog <http://notizblog.nierbeck.de/>
>>> Co-Author of Apache Karaf Cookbook <http://bit.ly/1ps9rkS>
>>>
>>> Software Architect / Project Manager / Scrum Master
>>>
>>>
>>>
>>
>>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
--
Apache Member
Apache Karaf <http://karaf.apache.org/> Committer & PMC
OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer &
Project Lead
blog <http://notizblog.nierbeck.de/>
Co-Author of Apache Karaf Cookbook <http://bit.ly/1ps9rkS>
Software Architect / Project Manager / Scrum Master
Re: Alternative backend for Decanter and some Shell stuff
Posted by Jean-Baptiste Onofré <jb...@nanthrax.net>.
Hi Achim,
I thought I provided some update by e-mail, my bad (we just quickly
discussed on IRC).
For the "special characters", why not just using a variable in the
session (like for the completion mode), and having a specific shell
instantiated when the variable is there.
I'm +1 on the specific shell in that case.
Regards
JB
On 01/05/2015 06:44 PM, Achim Nierbeck wrote:
> Hi,
>
> my guess is that it lacks of feedback due to the holidays, so I thought I
> just bring this up one more time.
> While adding the CQL Commands to my showcase I was in need to change the
> way the current gogo-shell is handling brackets and other characters.
> Now what would be the best to have those changes back in Karaf?
> Right now it's just a flag set by the session that is interpreted by
> specialized implementation of the standard gogo-shell classes.
> This isn't really nice as it would cause code-duplication.
> An alternative that Guillaume already mentioned to me on IRC would be to
> have a specialized shell for these cases.
> The benefit for this would be to have a shell capable of handling any kind
> of SQL like syntax, the completers for it can be based on the ones I made
> for CQL.
>
> I'm open to ideas :-)
>
> regards, Achim
>
>
> 2014-12-22 18:07 GMT+01:00 Achim Nierbeck <bc...@googlemail.com>:
>
>> Hi,
>>
>> I worked on a showcase to embed a Apache Cassandra DB inside Apache Karaf
>> [1].
>> This could be used for either prototyping with Cassandra or as an
>> alternative backend for the Decanter project.
>> Additionally I played with some shell commands for easy debugging
>> purposes, for details take a look [2].
>> For example you're able to connect to any given Cassandra cluster issue
>> some CQL statements either from the command line or from a file.
>> Additionally I added some CQLSH like commands including completion for
>> easy usage of USE, CREATE, SELECT or INSERT statements. For this I needed
>> to alter the Karaf shell a bit (with the help of gnodet :-) ) To disable
>> the shell interpretation of quotes and brackets.
>> Now that I altered the handling in Karaf/GOGO shell in a custom Karaf [3],
>> the question is, can we port this back to Karaf in a way that we don't need
>> to alter the gogo shell stuff again and have our own classes [4]. Another
>> Idea that came to my mind was to have a stripped down shell that could be
>> used for any SQL-like command. A similar completion syntax could be used
>> for any SQL Select, not only for the CQL syntax of Cassandra.
>>
>>
>> regards, Achim
>>
>> [1] - https://github.com/ANierbeck/Karaf-Cassandra
>> [2] -
>> https://blog.codecentric.de/en/2014/12/combining-apache-cassandra-apache-karaf/
>> [3] - https://github.com/ANierbeck/CustomKaraf
>> [4] - http://notizblog.nierbeck.de/2014/12/embedding-apache-cassandra/
>>
>> --
>>
>> Apache Member
>> Apache Karaf <http://karaf.apache.org/> Committer & PMC
>> OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer &
>> Project Lead
>> blog <http://notizblog.nierbeck.de/>
>> Co-Author of Apache Karaf Cookbook <http://bit.ly/1ps9rkS>
>>
>> Software Architect / Project Manager / Scrum Master
>>
>>
>
>
--
Jean-Baptiste Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com
Re: Alternative backend for Decanter and some Shell stuff
Posted by Achim Nierbeck <bc...@googlemail.com>.
Hi,
my guess is that it lacks of feedback due to the holidays, so I thought I
just bring this up one more time.
While adding the CQL Commands to my showcase I was in need to change the
way the current gogo-shell is handling brackets and other characters.
Now what would be the best to have those changes back in Karaf?
Right now it's just a flag set by the session that is interpreted by
specialized implementation of the standard gogo-shell classes.
This isn't really nice as it would cause code-duplication.
An alternative that Guillaume already mentioned to me on IRC would be to
have a specialized shell for these cases.
The benefit for this would be to have a shell capable of handling any kind
of SQL like syntax, the completers for it can be based on the ones I made
for CQL.
I'm open to ideas :-)
regards, Achim
2014-12-22 18:07 GMT+01:00 Achim Nierbeck <bc...@googlemail.com>:
> Hi,
>
> I worked on a showcase to embed a Apache Cassandra DB inside Apache Karaf
> [1].
> This could be used for either prototyping with Cassandra or as an
> alternative backend for the Decanter project.
> Additionally I played with some shell commands for easy debugging
> purposes, for details take a look [2].
> For example you're able to connect to any given Cassandra cluster issue
> some CQL statements either from the command line or from a file.
> Additionally I added some CQLSH like commands including completion for
> easy usage of USE, CREATE, SELECT or INSERT statements. For this I needed
> to alter the Karaf shell a bit (with the help of gnodet :-) ) To disable
> the shell interpretation of quotes and brackets.
> Now that I altered the handling in Karaf/GOGO shell in a custom Karaf [3],
> the question is, can we port this back to Karaf in a way that we don't need
> to alter the gogo shell stuff again and have our own classes [4]. Another
> Idea that came to my mind was to have a stripped down shell that could be
> used for any SQL-like command. A similar completion syntax could be used
> for any SQL Select, not only for the CQL syntax of Cassandra.
>
>
> regards, Achim
>
> [1] - https://github.com/ANierbeck/Karaf-Cassandra
> [2] -
> https://blog.codecentric.de/en/2014/12/combining-apache-cassandra-apache-karaf/
> [3] - https://github.com/ANierbeck/CustomKaraf
> [4] - http://notizblog.nierbeck.de/2014/12/embedding-apache-cassandra/
>
> --
>
> Apache Member
> Apache Karaf <http://karaf.apache.org/> Committer & PMC
> OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer &
> Project Lead
> blog <http://notizblog.nierbeck.de/>
> Co-Author of Apache Karaf Cookbook <http://bit.ly/1ps9rkS>
>
> Software Architect / Project Manager / Scrum Master
>
>
--
Apache Member
Apache Karaf <http://karaf.apache.org/> Committer & PMC
OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer &
Project Lead
blog <http://notizblog.nierbeck.de/>
Co-Author of Apache Karaf Cookbook <http://bit.ly/1ps9rkS>
Software Architect / Project Manager / Scrum Master