exist-development

[Exist-development] Backup/Restore of installed packages

[José M. F. G. <jm...@us...>]

Dear eXistentialists,
	I have been looking at the eXist packages system (.xar files) because development version of AtomicWiki is now installed in such way, and it seems quite robust. But, after a test I have realized that full system backups do not include those packages in the backup directory/zip. Is there some plans to include in the backup the installed packages?

	Kind Regards,
		José María
-- 
"La violencia es el último recurso del incompetente"
                - Salvor Hardin en "La Fundación" de Isaac Asimov
"A friend should be a master at guessing and keeping still:
        you must not want to see everything" - Friedrich Nietzche
"If you ever start taking things too seriously, just remember that
              we are talking monkeys on an organic spaceship flying
              through the universe" - Joe Rogan
"Premature optimization is the root of all evil." - Donald Knuth


José María Fernández González
e-mail: jos...@gm...

Re: [Exist-development] Backup/Restore of installed packages

[Wolfgang M. <wol...@ex...>]

Hi José,

> I have been looking at the eXist packages system (.xar files) because development version of AtomicWiki is now installed in such way, and it seems quite robust. But, after a test I have realized that full system backups do not include those packages in the backup directory/zip. Is there some plans to include in the backup the installed packages?

The problem is that the expath package manager unzips the packages
into webapp/WEB-INF/expathrepo/ and reads the package metadata from
there. We thus end up with two versions of the package: the one
deployed into the db and the original one in
webapp/WEB-INF/expathrepo/. This is a bit unfortunate.

I planned to change the package manager to keep its metadata in the db
and remove the source package once it got deployed, but I don't think
I'll have time for it during the weeks to come. If anybody wants to
dig into this...

Wolfgang

Re: [Exist-development] Backup/Restore of installed packages

[José M. F. G. <jm...@us...>]

Hi Wolf,
	I can take a look in that in my spare time, but I need some initial clues about what to look and change as I don't know the packages subsystem.

	José María

On 30/01/12 23:45, Wolfgang Meier wrote:
> Hi José,
>
>> I have been looking at the eXist packages system (.xar files) because development version of AtomicWiki is now installed in such way, and it seems quite robust. But, after a test I have realized that full system backups do not include those packages in the backup directory/zip. Is there some plans to include in the backup the installed packages?
>
> The problem is that the expath package manager unzips the packages
> into webapp/WEB-INF/expathrepo/ and reads the package metadata from
> there. We thus end up with two versions of the package: the one
> deployed into the db and the original one in
> webapp/WEB-INF/expathrepo/. This is a bit unfortunate.
>
> I planned to change the package manager to keep its metadata in the db
> and remove the source package once it got deployed, but I don't think
> I'll have time for it during the weeks to come. If anybody wants to
> dig into this...
>
> Wolfgang

-- 
"La violencia es el último recurso del incompetente"
                - Salvor Hardin en "La Fundación" de Isaac Asimov
"A friend should be a master at guessing and keeping still:
        you must not want to see everything" - Friedrich Nietzche
"If you ever start taking things too seriously, just remember that
              we are talking monkeys on an organic spaceship flying
              through the universe" - Joe Rogan
"Premature optimization is the root of all evil." - Donald Knuth


José María Fernández González
e-mail: jos...@gm...

Re: [Exist-development] Backup/Restore of installed packages

[Wolfgang M. <wol...@ex...>]

Hi José,

>        I can take a look in that in my spare time, but I need some initial
> clues about what to look and change as I don't know the packages subsystem.

If you look at org.exist.xquery.modules.expathrepo.InstallFunction (in
EXIST_HOME/extensions/modules/src), you should get the connection to
most of the used classes. Within a query, the eXist repository is
available through XQueryContext.getRepository(). Right now a
FileSystemStorage is used and I guess we would need to replace that
with our own implementation. FileSystemStorage is implemented within
the expath-pkg code:

http://expath-pkg.googlecode.com/svn/trunk

I hope this helps.

Wolfgang

Re: [Exist-development] Backup/Restore of installed packages

[José M. F. G. <jm...@us...>]

Hi Wolf,
	thanks for the links. I agree with you, I think I need to implement an EXistStorage class inheriting from Storage.

	José María

On 31/01/12 18:44, Wolfgang Meier wrote:
> Hi José,
>
>>         I can take a look in that in my spare time, but I need some initial
>> clues about what to look and change as I don't know the packages subsystem.
>
> If you look at org.exist.xquery.modules.expathrepo.InstallFunction (in
> EXIST_HOME/extensions/modules/src), you should get the connection to
> most of the used classes. Within a query, the eXist repository is
> available through XQueryContext.getRepository(). Right now a
> FileSystemStorage is used and I guess we would need to replace that
> with our own implementation. FileSystemStorage is implemented within
> the expath-pkg code:
>
> http://expath-pkg.googlecode.com/svn/trunk
>
> I hope this helps.
>
> Wolfgang

-- 
"La violencia es el último recurso del incompetente"
                - Salvor Hardin en "La Fundación" de Isaac Asimov
"A friend should be a master at guessing and keeping still:
        you must not want to see everything" - Friedrich Nietzche
"Apártate progresivamente, sin rupturas violentas, del amigo
        para quien representas un medio en vez de ser un fin"
        - Santiago Ramón y Cajal
"If you ever start taking things too seriously, just remember that
              we are talking monkeys on an organic spaceship flying
              through the universe" - Joe Rogan
"Premature optimization is the root of all evil." - Donald Knuth


José María Fernández González
e-mail: jos...@gm...