I did review your patch, please take a look at my comment in JIRA.
I feel like there is no need to inject  EntityManager into Admin,
corresponded checks should be added to ImportInitvalues (or into dao or
management objects used by it)

2012/4/20 Dmitry Zamula <[email protected]>

> I have implemented parameter "--drop" and create a patch:
> https://issues.apache.org/jira/browse/OPENMEETINGS-194
>
> Checking the old data in the database during the installation and the key
> "--force" not yet implemented. Some problems with injection of
> EntityManager - I will deal at the weekend.
>
> 2012/4/19 Maxim Solodovnik <[email protected]>
>
> > Or even better
> >
> > 1) by default installation will not start if DB has data
> > 2) optional parameter --force will run installation anyway
> > 3) optional parameter --drop will drop database before install
> >
> > 4) additional check to suppress web installer if DB exist can be added
> >
> > On Thu, Apr 19, 2012 at 15:28, Maxim Solodovnik <[email protected]
> > >wrote:
> >
> > > I would add separate option.
> > > And probably additional check if DB contains data before install
> > >
> > > 2012/4/19 [email protected] <[email protected]>
> > >
> > > Just one note: It is no good idea to drop the db silently during
> > >> installation.
> > >>
> > >> A user might simply think: "Hey a new version, lets unzip, alter the
> > >> persistence.xml file and re-install"
> > >> If you guys now implement a hook that automatically drops the previous
> > db
> > >> the user will loose all his data without even a notice or
> confirmation.
> > >> Of course we can write in our docs a big marker like "do not do this"
> > >> however the data is gone and we might receive a lot of emails from
> > >> frustrated users.
> > >>
> > >> So having a parameter in the install to optionally drop or truncate a
> > >> previous DB is good but making this the default behaviour and silently
> > >> drop
> > >> the db while installing is not a good idea.
> > >> Our current update process is: You export a backup, install in a blank
> > >> database and re-import the backup again.
> > >>
> > >> Sebastian
> > >>
> > >> 2012/4/19 Maxim Solodovnik <[email protected]>
> > >>
> > >> > I'm currently in the process of writing command line admin able to
> > >> > install/backup/restore OM (cleanup unused files is in progress)
> > >> >
> > >> > drop database can be added as an option to it (since Mapping Tool
> can
> > be
> > >> > directly called from comman line admin I hope there will be no
> issues
> > >> with
> > >> > DB url)
> > >> >
> > >> > please take a look at "package org.openmeetings.cli".
> > >> >
> > >> > It already has code for DB patching
> > >> > this code code can be generalized to get DB url.
> > >> >
> > >> > hope this will help.
> > >> >
> > >> > 2012/4/19 Dmitry Zamula <[email protected]>
> > >> >
> > >> > > Yes, guys, this is my fault. Initially, I assumed that build and
> > >> install
> > >> > > related. Maxim in the past letters has already said that it is
> not,
> > >> but
> > >> > > somehow I did not realize the importance of this.
> > >> > > Today I will deal with the installation process. Now the basic
> idea
> > -
> > >> > > before you install to remove all tables.
> > >> > >
> > >> > > 2012/4/18 Maxim Solodovnik <[email protected]>
> > >> > >
> > >> > > > Installation and build are different processes.
> > >> > > > Build did not creates any tables (except for junky tests).
> > >> > > > Double installation after manual removing guards against it is
> up
> > to
> > >> > > > user.(IMHO)
> > >> > > > As well as we are not tracking situations when user manually
> edits
> > >> DB.
> > >> > > > On Apr 18, 2012 11:46 PM, "Alexei Fedotov" <
> > >> [email protected]>
> > >> > > > wrote:
> > >> > > >
> > >> > > > > I miss the point - how fixing a build file would fix the
> > problem.
> > >> > > > >
> > >> > > > > Extra entries appear in runtime. Imagine someone would call
> > >> installer
> > >> > > > twice
> > >> > > > > in a row (that can be done by deleting some file in between
> > >> without
> > >> > > > > invoking tbe build file)
> > >> > > > >
> > >> > > > > That's why I suggested making menu entries unique, so the
> second
> > >> > insert
> > >> > > > > would update the table row, or dropping the tables right
> before
> > >> > > insering
> > >> > > > in
> > >> > > > > the web application.
> > >> > > > > 18.04.2012 19:31 пользователь "Dmitry Zamula" <
> > >> > [email protected]
> > >> > > >
> > >> > > > > написал:
> > >> > > > >
> > >> > > > > > Here is my "ugly-solution":
> > >> > > > > >
> > >> > > > > > <target name="refresh">
> > >> > > > > >    <taskdef name="tablerefresh"
> > >> > > > > > classname="org.apache.openjpa.jdbc.ant.MappingToolTask">
> > >> > > > > >      <classpath refid="jpa.enhancement.classpath" />
> > >> > > > > >    </taskdef>
> > >> > > > > >
> > >> > > > > >    <replaceregexp
> > file="${dist.persistence.dir}/persistence.xml"
> > >> > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
> match="(org.apache.commons.dbcp.BasicDataSource)([\s\S]*)(DriverClassName=)([a-zA-Z.]*[^,\s]*)"
> > >> > > > > > replace="\4\2\3\4"/>
> > >> > > > > >
> > >> > > > > >    <tablerefresh schemaAction="drop">
> > >> > > > > >      <config
> > >> > propertiesFile="${dist.persistence.dir}/persistence.xml"
> > >> > > > />
> > >> > > > > >    </tablerefresh>
> > >> > > > > >
> > >> > > > > >    <replaceregexp
> > file="${dist.persistence.dir}/persistence.xml"
> > >> > > > > > match="ConnectionDriverName&quot; value=&quot;[a-zA-Z.]*"
> > >> > > > > > replace="ConnectionDriverName&quot;
> > >> > > > > > value=&quot;org.apache.commons.dbcp.BasicDataSource"/>
> > >> > > > > >    <echo message="Table refreshing complete." />
> > >> > > > > > </target>
> > >> > > > > >
> > >> > > > > > I tested it, it works (drops all tables). Only in the case
> of
> > >> > oracle
> > >> > > > > > persistence.xml, it should add the line <property name =
> > >> > > > > > "openjpa.ConnectionDriverName" ...
> > >> > > > > >
> > >> > > > > > 2012/4/18 Alexei Fedotov <[email protected]>
> > >> > > > > >
> > >> > > > > > > Hello Dmitry,
> > >> > > > > > >
> > >> > > > > > > Answering questions sequentially, without paying attention
> > to
> > >> > your
> > >> > > > > later
> > >> > > > > > > progress. Discard answers if they come late.
> > >> > > > > > >
> > >> > > > > > > Why ant cannot find file persistence.xml?
> > >> > > > > > >
> > >> > > > > > > Ant is controversal. IMHO.
> > >> > > > > > >
> > >> > > > > > > Some values are assigned dynamicly, others are
> > pre-calculated
> > >> > > before
> > >> > > > > the
> > >> > > > > > > build process starts.
> > >> > > > > > >
> > >> > > > > > > This includes file tree. Ant believes it could match most
> > >> > > > dependencies
> > >> > > > > > > including copied files before the build process starts.
> This
> > >> does
> > >> > > not
> > >> > > > > > live
> > >> > > > > > > well with most custom tasks (if they have side effects)
> and
> > >> > > external
> > >> > > > > > tools
> > >> > > > > > > which copy or modify files.
> > >> > > > > > >
> > >> > > > > > > This also includes checking if the file located by tge
> path
> > in
> > >> > the
> > >> > > > > > property
> > >> > > > > > > exists.
> > >> > > > > > >
> > >> > > > > > > This sometimes gives the problems you describe.
> > >> > > > > > > 18.04.2012 13:30 пользователь "Dmitry Zamula" <
> > >> > > > [email protected]
> > >> > > > > >
> > >> > > > > > > написал:
> > >> > > > > > >
> > >> > > > > > > > Command-line version of MappingTool did not give an
> > >> answers. In
> > >> > > > > digging
> > >> > > > > > > the
> > >> > > > > > > > source code, I found that, in any case, AntClassLoader.
> > >> Bearing
> > >> > > in
> > >> > > > > mind
> > >> > > > > > > > that change a property "openjpa.ConnectionDriverName"
> from
> > >> > > > > > > > "org.apache.commons.dbcp.BasicDataSource" to
> > >> > > > "com.mysql.jdbc.Driver"
> > >> > > > > > > helps,
> > >> > > > > > > > I came to the conclusion that the problem is not in
> > >> > classcoader,
> > >> > > > and
> > >> > > > > to
> > >> > > > > > > use
> > >> > > > > > > > the driver.
> > >> > > > > > > > I asked this situation in OpenJPA mailing list, but not
> > yet
> > >> > > > received
> > >> > > > > a
> > >> > > > > > > > reply (unfortunately, the discussion on the OpenJPA
> > mailing
> > >> > list
> > >> > > > are
> > >> > > > > > not
> > >> > > > > > > so
> > >> > > > > > > > rapidly as in Openmeetings).
> > >> > > > > > > >
> > >> > > > > > > > I have not quite elegant solution to this problem. I
> could
> > >> use
> > >> > > > > ant-task
> > >> > > > > > > > "ReplaceRegExp" and write a regexp, which changes the
> line
> > >> > > > > > > > org.apache.commons.dbcp.BasicDataSource on the right
> > driver
> > >> > (from
> > >> > > > > > > > openjpa.ConnectionProperties), and at the end of the
> > >> > ant-target,
> > >> > > > gets
> > >> > > > > > all
> > >> > > > > > > > it was.
> > >> > > > > > > > Despite the "ugliness" of the decision, I would still
> > finish
> > >> > the
> > >> > > > > task,
> > >> > > > > > > and
> > >> > > > > > > > put a patch that is required to participate in GSoC.
> > >> > > > > > > >
> > >> > > > > > > > 2012/4/15 Maxim Solodovnik <[email protected]>
> > >> > > > > > > >
> > >> > > > > > > > > I also think so.
> > >> > > > > > > > > According to the Google and MappingTool sources it's
> > using
> > >> > some
> > >> > > > non
> > >> > > > > > > > > standard classloader. I tried to bypass it, but wasn't
> > >> > succeed
> > >> > > > > (need
> > >> > > > > > > more
> > >> > > > > > > > > time).
> > >> > > > > > > > >
> > >> > > > > > > > > Maybe running command -line version of MappingTool can
> > >> give
> > >> > > more
> > >> > > > > > > > > information?
> > >> > > > > > > > > On Apr 15, 2012 1:48 AM, "Dmitry Zamula" <
> > >> > > > [email protected]>
> > >> > > > > > > > wrote:
> > >> > > > > > > > >
> > >> > > > > > > > > > The problem was in persistent.xml (I tested only
> with
> > >> > mysql).
> > >> > > > > First
> > >> > > > > > > of
> > >> > > > > > > > > all,
> > >> > > > > > > > > > there was no <property name="openjpa.ConnectionURL"
> > >> > > > value="..."/>
> > >> > > > > > > (url
> > >> > > > > > > > > was
> > >> > > > > > > > > > inside the property name =
> > >> "openjpa.ConnectionProperties").
> > >> > > > > > > > > > But the main problem - MappingToolTask can not use a
> > >> > > connection
> > >> > > > > > from
> > >> > > > > > > > > pool.
> > >> > > > > > > > > > With <property name="openjpa.ConnectionDriverName"
> > >> > > > > > > > > > value="com.mysql.jdbc.Driver"/> it works, but value
> =
> > >> > > > > > > > > > "org.apache.commons.dbcp.BasicDataSource" does not
> > work.
> > >> > > > > Classpath
> > >> > > > > > > > > contains
> > >> > > > > > > > > > all required libraries.
> > >> > > > > > > > > > I think this is a bug in openjpa.
> > >> > > > > > > > > >
> > >> > > > > > > > > > 2012/4/14 Maxim Solodovnik <[email protected]>
> > >> > > > > > > > > >
> > >> > > > > > > > > > > OK
> > >> > > > > > > > > > > tried that.
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > We are using openjpa 2.2.0
> > >> > > > > > > > > > > Here is documentation from it:
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
> http://openjpa.apache.org/builds/2.2.0/apache-openjpa/docs/ref_guide_integration.html#ref_guide_integration_mappingtool
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > I slightly modified your code and was able to
> > >> reproduce
> > >> > > your
> > >> > > > > > > result:
> > >> > > > > > > > > > > A connection could not be obtained for driver
> class
> > >> > > > > > > > > > > "org.apache.commons.dbcp.BasicDataSource" and URL
> > >> "null".
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > But
> > >> > > > > > > > > > > according to my stacktace to lowest exception is:
> > >> > > > > > > > > > > Caused by: java.lang.IllegalArgumentException:
> > >> > > > > > > > > > > java.lang.ClassNotFoundException:
> > >> > > > > > > > > org.apache.commons.dbcp.BasicDataSource
> > >> > > > > > > > > > > at serp.util.Strings.toClass(Strings.java:164)
> > >> > > > > > > > > > > at serp.util.Strings.toClass(Strings.java:108)
> > >> > > > > > > > > > > at
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
> org.apache.openjpa.lib.conf.Configurations.newInstance(Configurations.java:211)
> > >> > > > > > > > > > > at
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
> org.apache.openjpa.lib.conf.Configurations.newInstance(Configurations.java:170)
> > >> > > > > > > > > > > at
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
> org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:114)
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > This means there is something wrong with
> MappingTool
> > >> > > > > > > > > > classpath/classloader
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > Unfortunately I have no time right now to dig
> this.
> > >> > > > > > > > > > > Currently I simply drop database before running
> > >> install.
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > please NOTE it is not necessary to run install
> every
> > >> time
> > >> > > you
> > >> > > > > > > rebuild
> > >> > > > > > > > > OM,
> > >> > > > > > > > > > > it works as expected without reinstalling. (the
> only
> > >> > > > exception
> > >> > > > > is
> > >> > > > > > > > > > changing
> > >> > > > > > > > > > > primary key on table, which is not often)
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > 2012/4/13 Dmitry Zamula <[email protected]>
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > > Ok, thank you. I used this documentation, and
> may
> > >> be it
> > >> > > > will
> > >> > > > > be
> > >> > > > > > > > > > > interesting
> > >> > > > > > > > > > > > to you:
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
> http://openjpa.apache.org/builds/1.0.2/apache-openjpa-1.0.2/docs/manual/ref_guide_mapping.html#ref_guide_mapping_mappingtool
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > 2012/4/13 Maxim Solodovnik <
> [email protected]>
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > > I'll try to read documentation regarding this
> > task
> > >> > > later
> > >> > > > > > today,
> > >> > > > > > > > > never
> > >> > > > > > > > > > > use
> > >> > > > > > > > > > > > > it before
> > >> > > > > > > > > > > > > On Apr 13, 2012 3:02 PM, "Dmitry Zamula" <
> > >> > > > > > > > [email protected]>
> > >> > > > > > > > > > > > wrote:
> > >> > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > Yes, but now in ${dist.persistence.dir} I
> > >> already
> > >> > > have
> > >> > > > a
> > >> > > > > > > > > > > > persistence.xml.
> > >> > > > > > > > > > > > > > And MappingToolTask does not see it.
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > 2012/4/13 Maxim Solodovnik <
> > >> [email protected]>
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > > Persistence.xml is copied to its location
> by
> > >> one
> > >> > of
> > >> > > > the
> > >> > > > > > ant
> > >> > > > > > > > > > tasks.
> > >> > > > > > > > > > > > You
> > >> > > > > > > > > > > > > > need
> > >> > > > > > > > > > > > > > > to add dependency to this task (have no
> > >> sources
> > >> > > right
> > >> > > > > > now,
> > >> > > > > > > > can
> > >> > > > > > > > > > tell
> > >> > > > > > > > > > > > > exact
> > >> > > > > > > > > > > > > > > task name later today)
> > >> > > > > > > > > > > > > > >  On Apr 13, 2012 2:23 PM, "Dmitry Zamula"
> <
> > >> > > > > > > > > > [email protected]
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > > > wrote:
> > >> > > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > > > Hello!
> > >> > > > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > > > I want to fix bug - after a few builds
> of
> > >> the
> > >> > > > system,
> > >> > > > > > > there
> > >> > > > > > > > > is
> > >> > > > > > > > > > a
> > >> > > > > > > > > > > > > > > > duplicate information in database(in
> > >> > particular,
> > >> > > > this
> > >> > > > > > > > affects
> > >> > > > > > > > > > the
> > >> > > > > > > > > > > > > > > interface
> > >> > > > > > > > > > > > > > > > - double buttons, menus, etc.). I wrote
> > new
> > >> > > target
> > >> > > > in
> > >> > > > > > > > > > build.xml:
> > >> > > > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > > > <target name="refresh">
> > >> > > > > > > > > > > > > > > >    <taskdef name="tablerefresh"
> > >> > > > > > > > > > > > > > > >
> > >> > > > > > classname="org.apache.openjpa.jdbc.ant.MappingToolTask">
> > >> > > > > > > > > > > > > > > >      <classpath
> > >> > refid="jpa.enhancement.classpath"
> > >> > > > />
> > >> > > > > > > > > > > > > > > >    </taskdef>
> > >> > > > > > > > > > > > > > > >    <tablerefresh schemaAction="refresh">
> > >> > > > > > > > > > > > > > > >      <config
> > >> > > > > > > > > > > >
> > >> > propertiesFile="${dist.persistence.dir}/persistence.xml"
> > >> > > > > > > > > > > > > > />
> > >> > > > > > > > > > > > > > > >    </tablerefresh>
> > >> > > > > > > > > > > > > > > >    <echo message="Table refreshing
> > >> complete."
> > >> > />
> > >> > > > > > > > > > > > > > > > </target>
> > >> > > > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > > > But, MappingToolTask cant find
> > >> persistence.xml
> > >> > > > > (Error:
> > >> > > > > > A
> > >> > > > > > > > > > > connection
> > >> > > > > > > > > > > > > > could
> > >> > > > > > > > > > > > > > > > not be obtained for driver class
> > >> > > > > > > > > > > > > > > "org.apache.commons.dbcp.BasicDataSource"
> > >> > > > > > > > > > > > > > > > and URL "null").
> > >> > > > > > > > > > > > > > > > Does anyone have any ideas why this is
> > >> > happening?
> > >> > > > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > --
> > >> > > > > > > > > > > > > >
> > >> > > > _________________________________________________________
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > С уважением,
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > > > Замула Дмитрий
> > >> > > > > > > > > > > > > >
> > >> > > > > > > > > > > > >
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > --
> > >> > > > > > > > > > > >
> > >> > _________________________________________________________
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > С уважением,
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > Замула Дмитрий
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > --
> > >> > > > > > > > > > > WBR
> > >> > > > > > > > > > > Maxim aka solomax
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > > > --
> > >> > > > > > > > > >
> > >> _________________________________________________________
> > >> > > > > > > > > >
> > >> > > > > > > > > > С уважением,
> > >> > > > > > > > > >
> > >> > > > > > > > > > Замула Дмитрий
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > > >
> > >> > > > > > > >
> > >> > > > > > > > --
> > >> > > > > > > >
> _________________________________________________________
> > >> > > > > > > >
> > >> > > > > > > > С уважением,
> > >> > > > > > > >
> > >> > > > > > > > Замула Дмитрий
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > > >
> > >> > > > > >
> > >> > > > > > --
> > >> > > > > > _________________________________________________________
> > >> > > > > >
> > >> > > > > > С уважением,
> > >> > > > > >
> > >> > > > > > Замула Дмитрий
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> > >
> > >> > >
> > >> > > --
> > >> > > _________________________________________________________
> > >> > >
> > >> > > С уважением,
> > >> > >
> > >> > > Замула Дмитрий
> > >> > >
> > >> >
> > >> >
> > >> >
> > >> > --
> > >> > WBR
> > >> > Maxim aka solomax
> > >> >
> > >>
> > >>
> > >>
> > >> --
> > >> Sebastian Wagner
> > >> https://twitter.com/#!/dead_lock
> > >> http://www.openmeetings.de
> > >> http://www.webbase-design.de
> > >> http://www.wagner-sebastian.com
> > >> [email protected]
> > >>
> > >
> > >
> > >
> > > --
> > > WBR
> > > Maxim aka solomax
> > >
> >
> >
> >
> > --
> > WBR
> > Maxim aka solomax
> >
>
>
>
> --
> _________________________________________________________
>
> С уважением,
>
> Замула Дмитрий
>



-- 
WBR
Maxim aka solomax

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