You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@buildr.apache.org by Ijonas Kisselbach <ij...@gmail.com> on 2009/09/29 00:25:07 UTC
problem loading Java classes in extension
Hi,
I'm trying to write a extension that exports DDLs using HIbernate's
schemaexport tool. Although I've added the hibernate-tools dependency
to the Java.classpath I don't see it downloading the jar and my .m2/
repository remains empty of the Hibernate Tools jars.
I've got the following fragment of code in my extension which does all
the heavy lifting:
Rake::Task.define_task 'ddl' do |task|
puts "classpath 1: #{Java.classpath}"
Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA"
puts "classpath 2: #{Java.classpath}"
Java.load
puts "classpath 3: #{Java.classpath}"
puts Java.java.lang.String.new("hello there")
config_file = Java.java.io.File.new(config_file_path)
puts config_file.canonicalPath
config = Java.org.hibernate.cfg.Configuration.configure
(config_file)
# config = nil
schema_export = Java.org.hibernate.tool.hbm2ddl.SchemaExport.new
(config)
schema_export.outputFile = output_filename
schema_export.execute(true, true, false, false)
end
Producing the following output
** Execute ContentMigrator:ddl
classpath 1: org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-
launcher:jar:1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/
jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/java
classpath 2: org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-
launcher:jar:1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/
jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/
javaorg.hibernate:hibernate-tools:jar:3.2.3.GA
classpath 3: org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-
launcher:jar:1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/
jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/
javaorg.hibernate:hibernate-tools:jar:3.2.3.GA
hello there
/Users/ijonas/code/v3branch-rails/src/test/resources/
testMysql5InnoDBApplicationContext.xml
Buildr aborted!
cannot load Java class org.hibernate.cfg.Configuration
/Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/
rake.rb:472:in `get_proxy_or_package_under_package'
/Users/ijonas/java/jruby-1.3.1/lib/ruby/site_ruby/1.8/builtin/
javasupport/java.rb:51:in `method_missing'
ddlexporter.rb:42:in `ddl'
/Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/
rake.rb:615:in `call'
The classpath isn't resolved properly by the looks of things and hence
the build fails.
Is Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA" the
right way of adding a dependency for my extension ? If so, what am I
doing wrong ?
Many thanks,
Ijonas.
Re: problem loading Java classes in extension
Posted by Ijonas Kisselbach <ij...@gmail.com>.
Thanks Daniel,
Your suggestion worked. Moved the Java.classpath to just after the
module declaration and Buildr began downloading the artifact
My extension now looks like this:
module DDLExporter
include Extension
Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA"
first_time do
.....
Regards,
Ijonas.
On 28 Sep 2009, at 23:30, Daniel Spiewak wrote:
> I *think* your treatment of Java.classpath is just fine, but to be
> safe you
> could wrap each artifact String in artifact(...).invoke Probably
> isn't
> necessary though...
>
> The problem is actually that you haven't invoked Java.load. More
> importantly, even if you did perform the invocation, it has probably
> been
> invoked previous to that point in the code (when the task is
> executed),
> meaning that your classpath additions will not be recognized. Try
> sticking
> the Java.classpath mutations somewhere in the static scope. They
> should be
> executed when your extension is *loaded*. Then, invoke Java.load
> within the
> task just before you call the Hibernate class.
>
> Rule of thumb: add to classpath as *early* as possible, invoke load
> as *late
> * as possible.
>
> Daniel
>
> On Mon, Sep 28, 2009 at 5:25 PM, Ijonas Kisselbach <
> ijonas.kisselbach@gmail.com> wrote:
>
>> Hi,
>>
>> I'm trying to write a extension that exports DDLs using HIbernate's
>> schemaexport tool. Although I've added the hibernate-tools
>> dependency to the
>> Java.classpath I don't see it downloading the jar and my .m2/
>> repository
>> remains empty of the Hibernate Tools jars.
>>
>> I've got the following fragment of code in my extension which does
>> all the
>> heavy lifting:
>>
>> Rake::Task.define_task 'ddl' do |task|
>> puts "classpath 1: #{Java.classpath}"
>> Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA"
>> puts "classpath 2: #{Java.classpath}"
>> Java.load
>> puts "classpath 3: #{Java.classpath}"
>> puts Java.java.lang.String.new("hello there")
>> config_file = Java.java.io.File.new(config_file_path)
>> puts config_file.canonicalPath
>> config = Java.org.hibernate.cfg.Configuration.configure
>> (config_file)
>>
>> # config = nil
>> schema_export =
>> Java.org.hibernate.tool.hbm2ddl.SchemaExport.new(config)
>> schema_export.outputFile = output_filename
>> schema_export.execute(true, true, false, false)
>> end
>>
>> Producing the following output
>>
>> ** Execute ContentMigrator:ddl
>> classpath 1:
>> org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-launcher:jar:
>> 1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/
>> jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/java
>> classpath 2:
>> org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-launcher:jar:
>> 1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/
>> jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/
>> javaorg.hibernate:hibernate-tools:jar:
>> 3.2.3.GA
>> classpath 3:
>> org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-launcher:jar:
>> 1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/
>> jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/
>> javaorg.hibernate:hibernate-tools:jar:
>> 3.2.3.GA
>> hello there
>>
>> /Users/ijonas/code/v3branch-rails/src/test/resources/
>> testMysql5InnoDBApplicationContext.xml
>> Buildr aborted!
>> cannot load Java class org.hibernate.cfg.Configuration
>> /Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/rake-0.8.4/
>> lib/rake.rb:472:in
>> `get_proxy_or_package_under_package'
>> /Users/ijonas/java/jruby-1.3.1/lib/ruby/site_ruby/1.8/builtin/
>> javasupport/java.rb:51:in
>> `method_missing'
>> ddlexporter.rb:42:in `ddl'
>> /Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/rake-0.8.4/
>> lib/rake.rb:615:in
>> `call'
>>
>> The classpath isn't resolved properly by the looks of things and
>> hence the
>> build fails.
>>
>> Is Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA" the
>> right way of adding a dependency for my extension ? If so, what am
>> I doing
>> wrong ?
>>
>> Many thanks,
>> Ijonas.
>>
>>
Re: problem loading Java classes in extension
Posted by Daniel Spiewak <dj...@gmail.com>.
I *think* your treatment of Java.classpath is just fine, but to be safe you
could wrap each artifact String in artifact(...).invoke Probably isn't
necessary though...
The problem is actually that you haven't invoked Java.load. More
importantly, even if you did perform the invocation, it has probably been
invoked previous to that point in the code (when the task is executed),
meaning that your classpath additions will not be recognized. Try sticking
the Java.classpath mutations somewhere in the static scope. They should be
executed when your extension is *loaded*. Then, invoke Java.load within the
task just before you call the Hibernate class.
Rule of thumb: add to classpath as *early* as possible, invoke load as *late
* as possible.
Daniel
On Mon, Sep 28, 2009 at 5:25 PM, Ijonas Kisselbach <
ijonas.kisselbach@gmail.com> wrote:
> Hi,
>
> I'm trying to write a extension that exports DDLs using HIbernate's
> schemaexport tool. Although I've added the hibernate-tools dependency to the
> Java.classpath I don't see it downloading the jar and my .m2/repository
> remains empty of the Hibernate Tools jars.
>
> I've got the following fragment of code in my extension which does all the
> heavy lifting:
>
> Rake::Task.define_task 'ddl' do |task|
> puts "classpath 1: #{Java.classpath}"
> Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA"
> puts "classpath 2: #{Java.classpath}"
> Java.load
> puts "classpath 3: #{Java.classpath}"
> puts Java.java.lang.String.new("hello there")
> config_file = Java.java.io.File.new(config_file_path)
> puts config_file.canonicalPath
> config = Java.org.hibernate.cfg.Configuration.configure(config_file)
>
> # config = nil
> schema_export =
> Java.org.hibernate.tool.hbm2ddl.SchemaExport.new(config)
> schema_export.outputFile = output_filename
> schema_export.execute(true, true, false, false)
> end
>
> Producing the following output
>
> ** Execute ContentMigrator:ddl
> classpath 1:
> org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-launcher:jar:1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/java
> classpath 2:
> org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-launcher:jar:1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/javaorg.hibernate:hibernate-tools:jar:
> 3.2.3.GA
> classpath 3:
> org.apache.ant:ant:jar:1.7.1org.apache.ant:ant-launcher:jar:1.7.1org.apache.ant:ant-trax:jar:1.7.1/Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/buildr-1.3.4-java/lib/buildr/javaorg.hibernate:hibernate-tools:jar:
> 3.2.3.GA
> hello there
>
> /Users/ijonas/code/v3branch-rails/src/test/resources/testMysql5InnoDBApplicationContext.xml
> Buildr aborted!
> cannot load Java class org.hibernate.cfg.Configuration
> /Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:472:in
> `get_proxy_or_package_under_package'
> /Users/ijonas/java/jruby-1.3.1/lib/ruby/site_ruby/1.8/builtin/javasupport/java.rb:51:in
> `method_missing'
> ddlexporter.rb:42:in `ddl'
> /Users/ijonas/java/jruby-1.3.1/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:615:in
> `call'
>
> The classpath isn't resolved properly by the looks of things and hence the
> build fails.
>
> Is Java.classpath << "org.hibernate:hibernate-tools:jar:3.2.3.GA" the
> right way of adding a dependency for my extension ? If so, what am I doing
> wrong ?
>
> Many thanks,
> Ijonas.
>
>