New subject: [xwiki-devs] Building Xwiki core

3 Mar 2008

Yes,
I am setting the JAVA_HOME variable with DOS prompt
and after I set it, I log of and then it is available in the list of env.
variables after I log back in.
But, when I try to run mvn install, it still gives me the same error.

Also, although, I set the M2_HOMe variable, I am not able to use mvn command
without its location! (I have to write the full path of the mvn.bat file and
then say install after a space)
I dont know what I am doing wrong.

Thanks for your replies.

On 3/3/08, devs-request(a)xwiki.org &lt;devs-request(a)xwiki.org&gt; wrote:
...

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 Today's Topics:

   1. Re: Building Xwiki core (Asiri Rathnayake)

 ----------------------------------------------------------------------

 Message: 1
 Date: Tue, 4 Mar 2008 01:43:58 +0530
 From: "Asiri Rathnayake" &lt;asiri.rathnayake(a)gmail.com&gt;
 Subject: Re: [xwiki-devs] Building Xwiki core
 To: "XWiki Developers" &lt;devs(a)xwiki.org&gt;
 Message-ID:
        &lt;9fd36c290803031213r60305c48qbc2c0e5996b402d1(a)mail.gmail.com&gt;
 Content-Type: text/plain; charset="iso-8859-1"

 Hi,

 Did you check whether JAVA_HOME is available in dos prompt as well ?
 Perhaps
 you should try "set JAVA_HOME=C:\abc\Java\jdk1.5.0_14" prior to running
 "mvn
 install" ?

 - Asiri

 On Tue, Mar 4, 2008 at 1:16 AM, Kamna Jain &lt;kammy.scorpi(a)gmail.com&gt; wrote:

  Hello,

 I am trying to learn how to build XWiki from the source.

 I checked out the source code in Eclipse 3.3 using Sunclipse and then I
 created a Java Project out of the XWiki Core/src folder.
 Now, I am trying to follow directions from the links -
 http://dev.xwiki.org/xwiki/bin/view/Community/Building
 I downloaded maven-2.1-SNAPSHOT and create dthe .m2/settings.xml.
 I also created M2_HOME varibale and set the PATH variable with M2_HOME.
 Set the JAVA_HOME to the jdk installed on my system.

 But, when I try "mvn install" from the directory where I have the
 XWiki/src checked out (Eclipse workspace), it says that JAVA_HOME is not  set
  and gives me the following error:

 ERROR: JAVA_HOME not found in your environment.
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation

 I have JAVA_HOME set and it shows up in the list of env. variables in my
 system like this:

 JAVA_HOME = C:\abc\Java\jdk1.5.0_14
 PATH = C:\WINDOWS;C:\WINDOWS\System32;C:\Program
 Files\Subversion\bin;C:\Program Files\TortoiseSVN\bin;C:\Program  Files\Quest
  Software\PuTTY\;C:\Program
Files\QuickTime\QTSystem\;C:\Program  Files\Quest
  Software\PuTTY\;%JAVA_HOME%\bin;%M2_HOME%\bin

 Could you please tell me what I am doing wrong and what I should change  to
  get this right!

 Also, am I on the irght path when I I say I am trying to buildthe src of
 XWiki -core? and nothing else! As an eclipse project, it is all compiled  and
  does not show errors implying that it has all the
files that it needs  for it
  to complie.

 Thanks

 On 3/3/08, devs-request(a)xwiki.org &lt;devs-request(a)xwiki.org&gt; wrote:
 >
 > Send devs mailing list submissions to
 >        devs(a)xwiki.org
 >
 > To subscribe or unsubscribe via the World Wide Web, visit
 >        http://lists.xwiki.org/mailman/listinfo/devs
 > or, via email, send a message with subject or body 'help' to
 >        devs-request(a)xwiki.org
 >
 > You can reach the person managing the list at
 >        devs-owner(a)xwiki.org
 >
 > When replying, please edit your Subject line so it is more specific
 > than "Re: Contents of devs digest..."
 >
 >
 > Today's Topics:
 >
 >   1. Re: Profiling: Why do attachments require so      much    memory
 >      (Sergiu Dumitriu)
 >   2. [VOTE] Change the attachment archive storage (Sergiu Dumitriu)
 >   3. Re: [VOTE] Change the attachment archive storage (Vincent Massol)
 >   4. Re: [VOTE] Change the attachment archive storage (Sergiu  Dumitriu)
  >   5. [Proposal] XE 1.3 final release date
(Vincent Massol)
 >   6. Re: Xwiki Enterprise 1.3 RC1 release date? (Vincent Massol)
 >   7. Re: About GSoC 2008 (Asiri Rathnayake)
 >   8. Re: Xwiki Enterprise 1.3 RC1 release date? (Sergiu Dumitriu)
 >
 >
 > ----------------------------------------------------------------------
 >
 > Message: 1
 > Date: Mon, 03 Mar 2008 17:28:21 +0100
 > From: Sergiu Dumitriu &lt;sergiu(a)xwiki.com&gt;
 > Subject: Re: [xwiki-devs] Profiling: Why do attachments require so
 >        much    memory
 > To: XWiki Developers &lt;devs(a)xwiki.org&gt;
 > Message-ID: &lt;47CC2725.40707(a)xwiki.com&gt;
 > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
 >
 > Vincent Massol wrote:
 > > Nice work Sergiu. We should transform this into a jira issue to not
 > > forget it.
 > >
 >
 > We should vote for it first.
 >
 > > One other idea: store attachments on the file system and not in the
 > DB.
 > >
 > > Thanks
 > > -Vincent
 > >
 > > On Feb 27, 2008, at 3:48 PM, Sergiu Dumitriu wrote:
 > >
 > >> Hi devs,
 > >>
 > >> Last night I checked what happens when uploading a file, and why 
does
  > >> that action require huge amounts of
memory.
 > >>
 > >> So, whenever uploading a file, there are several places where the
 > file
 > >> content is loaded into memory:
 > >> - as an XWikiAttachment as byte[] ~= filesize
 > >> - as an XWikiAttachmentArchive as Base64 encoded string ~=
 > >> 2*4*filesize
 > >> - as hibernate tokens that are sent to the database, clones of the
 > >> XWikiAttachment and XWikiAttachmentArchive data ~= 9*filesize
 > >> - as Cached attachments and attachment archive, clones of the same 
2
  > >> objects ~= 9*filesize
 > >>
 > >> Total: ~27*filesize bytes in memory.
 > >>
 > >> So, out of a 10M file, we get at least 270M of needed memory.
 > >>
 > >> Worse, if this is not the first version of the attachment, then the
 > >> complete attachment history is loaded in memory, so add another
 > >> 24*versionsize*versions of memory needed during upload.
 > >>
 > >> After the upload is done, most of these are cleared, only the 
cached
  > >> objects will remain in memory.
 > >>
 > >> However, a problem still remains with the cache. It is a LRU cache
 > >> with
 > >> a fixed capacity, so even if the memory is full, the cached
 > >> attachments
 > >> will not be released.
 > >>
 > >> Things we can improve:
 > >> - Make the cache use References. This will allow cached attachments
 > to
 > >> be removed from memory when there's a need for more memory
 > >> - Do a better attachment archive system. I'm not sure it is a good
 > >> idea
 > >> to have diff-based versioning of attachments. In theory, it saves
 > >> space
 > >> when versions are much alike, but it does not really work in 
practice
  > >> because it does a line-diff, and a
base64 encoded string does not
 > have
 > >> newlines. What's more, the space gain would be efficient when there
 > >> are
 > >> many versions, as one version alone takes 4 times more space than a
 > >> binary dump of the content.
 > >>
 > >> Suppose we switch to a "one version per table row" for
attachment
 > >> history, with direct binary dump, then the memory needed for
 > uploading
 > >> would be 6*filesize, which is much less.
 >
 >
 > --
 > Sergiu Dumitriu
 > http://purl.org/net/sergiu/
 >
 >
 > ------------------------------
 >
 > Message: 2
 > Date: Mon, 03 Mar 2008 17:34:07 +0100
 > From: Sergiu Dumitriu &lt;sergiu(a)xwiki.com&gt;
 > Subject: [xwiki-devs] [VOTE] Change the attachment archive storage
 > To: XWiki Developers &lt;devs(a)xwiki.org&gt;
 > Message-ID: &lt;47CC287F.9090609(a)xwiki.com&gt;
 > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
 >
 > Hi devs,
 >
 > As detailed in another mail
 > (http://lists.xwiki.org/pipermail/devs/2008-February/005344.html), the
 > current attachment archive mechanism is very inefficient. We should
 > write a new one, which stores attachment versions as plain binary  data,
  > and see if the current core is pluggable
enough to allow the old
 > mechanism to be preserved as a plugin, and possibly define other  storage
  > mechanisms, like a filesystem based one.
 >
 > Artem, do you think you can help, as this is something related to what
 > you've been working on?
 > --
 > Sergiu Dumitriu
 > http://purl.org/net/sergiu/
 >
 >
 > ------------------------------
 >
 > Message: 3
 > Date: Mon, 3 Mar 2008 17:40:39 +0100
 > From: Vincent Massol &lt;vincent(a)massol.net&gt;
 > Subject: Re: [xwiki-devs] [VOTE] Change the attachment archive storage
 > To: XWiki Developers &lt;devs(a)xwiki.org&gt;
 > Message-ID: &lt;D5354D29-6FB9-41CB-A450-C77DE4E9BB54(a)massol.net&gt;
 > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
 >
 >
 > On Mar 3, 2008, at 5:34 PM, Sergiu Dumitriu wrote:
 >
 > > Hi devs,
 > >
 > > As detailed in another mail
 > > (http://lists.xwiki.org/pipermail/devs/2008-February/005344.html),  the
  > > current attachment archive mechanism is
very inefficient. We should
 > > write a new one, which stores attachment versions as plain binary
 > > data,
 > > and see if the current core is pluggable enough to allow the old
 > > mechanism to be preserved as a plugin, and possibly define other
 > > storage
 > > mechanisms, like a filesystem based one.
 > >
 > > Artem, do you think you can help, as this is something related to  what
 > > > you've been working on?
 > >
 > > My only worry is that last time we changed the database format we
 > > spent several months stabilizing it... since there were lots of
 > > problems. I'm not even sure we've finished stabilizing it fully...
 > >
 > > So is there any chance that this would be simpler? :)
 > >
 > > Thanks
 > > -Vincent
 > >
 > >
 > >
 > > ------------------------------
 > >
 > > Message: 4
 > > Date: Mon, 03 Mar 2008 18:00:12 +0100
 > > From: Sergiu Dumitriu &lt;sergiu(a)xwiki.com&gt;
 > > Subject: Re: [xwiki-devs] [VOTE] Change the attachment archive storage
 > > To: XWiki Developers &lt;devs(a)xwiki.org&gt;
 > > Message-ID: &lt;47CC2E9C.8070404(a)xwiki.com&gt;
 > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
 > >
 > > Vincent Massol wrote:
 > > > On Mar 3, 2008, at 5:34 PM, Sergiu Dumitriu wrote:
 > > >
 > > >> Hi devs,
 > > >>
 > > >> As detailed in another mail
 > > >> (http://lists.xwiki.org/pipermail/devs/2008-February/005344.html),
 > > the
 > > >> current attachment archive mechanism is very inefficient. We should
 > > >> write a new one, which stores attachment versions as plain binary
 > > >> data,
 > > >> and see if the current core is pluggable enough to allow the old
 > > >> mechanism to be preserved as a plugin, and possibly define other
 > > >> storage
 > > >> mechanisms, like a filesystem based one.
 > > >>
 > > >> Artem, do you think you can help, as this is something related to
 > > what
 > > >> you've been working on?
 > > >
 > > > My only worry is that last time we changed the database format we
 > > > spent several months stabilizing it... since there were lots of
 > > > problems. I'm not even sure we've finished stabilizing it
fully...
 > > >
 > > > So is there any chance that this would be simpler? :)
 > > >
 > > > Thanks
 > > > -Vincent
 > > >
 > >
 > > It should be simpler, as attachments are just binary blobs, while the
 > > XML history is much too fragile.
 > > --
 > > Sergiu Dumitriu
 > > http://purl.org/net/sergiu/
 > >
 > >
 > > ------------------------------
 > >
 > > Message: 5
 > > Date: Mon, 3 Mar 2008 18:18:18 +0100
 > > From: Vincent Massol &lt;vincent(a)massol.net&gt;
 > > Subject: [xwiki-devs] [Proposal] XE 1.3 final release date
 > > To: XWiki Developers &lt;devs(a)xwiki.org&gt;
 > > Message-ID: &lt;FE2B2F15-5128-47CC-90B7-CAF96398BADE(a)massol.net&gt;
 > > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
 > >
 > > Hi,
 > >
 > > I'm proposing to revise the 1.3 Final release date to this Friday 7th
 > > of March 2007.
 > >
 > > We've already fixed the major issues raised in 1.3RC1 but I think we
 > > need a few days to let people report any issues they might have had
 > > with 1.3RC1.
 > >
 > > Let me know what you think and especially if you don't agree. I'm
 > > proposing to do the release.
 > >
 > > Thanks
 > > -Vincent
 > >
 > >
 > >
 > > ------------------------------
 > >
 > > Message: 6
 > > Date: Mon, 3 Mar 2008 18:23:39 +0100
 > > From: Vincent Massol &lt;vincent(a)massol.net&gt;
 > > Subject: Re: [xwiki-devs] Xwiki Enterprise 1.3 RC1 release date?
 > > To: XWiki Developers &lt;devs(a)xwiki.org&gt;
 > > Message-ID: &lt;161441E7-DC86-48ED-A91A-A8F143A2FC4B(a)massol.net&gt;
 > > Content-Type: text/plain; charset="us-ascii"
 > >
 > >
 > > On Feb 27, 2008, at 3:17 PM, Everitt, Glenn wrote:
 > >
 > > > Is the plan to provide a  xwiki-enterprise-web1-1.3-rc1.war file on
 > > > the Xwiki Download page?  When do you think this would be
 > > > available?  Would it be better to pull it directly from svn?  If I
 > > > get it from svn how is the RC1 release marked?
 > > >
 > > It's been released a few days ago...
 > > > I noticed that you were looking at using GWT Html editor.  Doesn't
 > > > GWT Html editor just wrap the FCKEditor?  What is the advantage of
 > > > using GWT Html Editor instead of just using the FCKEditor?
 > > >
 > > I have no idea. Anyone knows?
 > >
 > > Thanks
 > > -Vincent
 > >
 > >  