RE: Override dependency classes with another module's classes
Martin,
Unfortunately, we are overriding classes from a dependency library, so we
are just putting the classes in the same package and wanting our overriding
classes to get precedence on the classpath. So, our classes are in the same
package as the library's classes and have the same class name, we just want
ours to be used at compile time.
Thanks,
Brendan Haverlock
From: Martin Gainty [mailto:mgai...@hotmail.com]
Sent: Thursday, May 21, 2009 6:15 PM
To: brend...@mirthcorp.com
Subject: RE: Override dependency classes with another module's classes
public interface ModuleC {
public int doCalculationC(int a)
{
return(a+1);
}
}
public class ModuleA implements ModuleC {
public int doCalculationA(int a)
{
return (a+2);
}
public int doCalculationC(int a)
{
return(a+1);
}
}
1. I have a Module A that is overriding a few, but not all, classes from its
> Dependency C.
//B extends A and all protected/public methods from A
//B implements C and all protected/public methods from C
public class ModuleB extends ModuleA implements ModuleC
{
public int doCalculationB(int a)
{
return (a+3);
}
public int doCalculationA(int a)
{
return (a+2);
}
public int doCalculationC(int a)
{
return(a+1);
}
}
> 2. I have another Module B that is dependent on Module A, but also on the
> Dependency C.
> 3. Module B is getting compile errors because it is using the classes from
> Dependency C but not finding the overridden classes from Module A.
> From: brend...@mirthcorp.com
> To: users@maven.apache.org
> Subject: Override dependency classes with another module's classes
> Date: Thu, 21 May 2009 17:39:46 -0700
>
> Hi all,
>
> I've run into an issue with my dependencies in Maven:
>
> 1. I have a Module A that is overriding a few, but not all, classes from
its
> Dependency C.
> 2. I have another Module B that is dependent on Module A, but also on the
> Dependency C.
> 3. Module B is getting compile errors because it is using the classes from
> Dependency C but not finding the overridden classes from Module A.
>
> Question: Is there a way for me to specify dependency precedence so that
> Module B knows to use the classes from Dependency C, except for the ones
> that were overridden in Module A?
>
> Thanks,
> Brendan Haverlock
>
>
>
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Re: Override dependency classes with another module's classes
> Unfortunately, we are overriding classes from a dependency library, so we > are just putting the classes in the same package and wanting our overriding > classes to get precedence on the classpath. So, our classes are in the same > package as the library's classes and have the same class name, we just want > ours to be used at compile time. This just won't work at all, at least not consistently. Build a different jar containing just the classes you DON'T override, and depend on it instead. Wayne - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
RE: Override dependency classes with another module's classes
Thanks Wayne...I just found a link to the other post about this: http://www.mail-archive.com/users@maven.apache.org/msg70079.html Thanks for not redirecting me to the "What is Maven" page. That seems like the only plausible solution to me for now. Is there any plan for making the dependency order matter in the POM files? That would be really useful! Thanks again, Brendan Haverlock -Original Message- From: Wayne Fay [mailto:wayne...@gmail.com] Sent: Friday, May 22, 2009 11:12 AM To: Maven Users List Subject: Re: Override dependency classes with another module's classes > Unfortunately, we are overriding classes from a dependency library, so we > are just putting the classes in the same package and wanting our overriding > classes to get precedence on the classpath. So, our classes are in the same > package as the library's classes and have the same class name, we just want > ours to be used at compile time. This just won't work at all, at least not consistently. Build a different jar containing just the classes you DON'T override, and depend on it instead. Wayne - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
Re: Override dependency classes with another module's classes
The order in the poms is maintained as of 2.0.10, so you should be able to affect the classpath by reordering the poms. 2009/5/22 Brendan Haverlock > Thanks Wayne...I just found a link to the other post about this: > http://www.mail-archive.com/users@maven.apache.org/msg70079.html Thanks > for not redirecting me to the "What is Maven" page. > > That seems like the only plausible solution to me for now. Is there any > plan for making the dependency order matter in the POM files? That would be > really useful! > > Thanks again, > > Brendan Haverlock > > -Original Message- > From: Wayne Fay [mailto:wayne...@gmail.com] > Sent: Friday, May 22, 2009 11:12 AM > To: Maven Users List > Subject: Re: Override dependency classes with another module's classes > > > Unfortunately, we are overriding classes from a dependency library, so we > > are just putting the classes in the same package and wanting our > overriding > > classes to get precedence on the classpath. So, our classes are in the > same > > package as the library's classes and have the same class name, we just > want > > ours to be used at compile time. > > This just won't work at all, at least not consistently. Build a > different jar containing just the classes you DON'T override, and > depend on it instead. > > Wayne > > - > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > > > > - > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > >
RE: Override dependency classes with another module's classes
I am using 2.1.0, and it doesn't seem to make a difference which order I put them in. Based on what you said, shouldn't this be working in my version? Thanks, Brendan Haverlock -Original Message- From: Brian Fox [mailto:bri...@infinity.nu] Sent: Monday, May 25, 2009 3:19 PM To: Maven Users List Subject: Re: Override dependency classes with another module's classes The order in the poms is maintained as of 2.0.10, so you should be able to affect the classpath by reordering the poms. 2009/5/22 Brendan Haverlock > Thanks Wayne...I just found a link to the other post about this: > http://www.mail-archive.com/users@maven.apache.org/msg70079.html Thanks > for not redirecting me to the "What is Maven" page. > > That seems like the only plausible solution to me for now. Is there any > plan for making the dependency order matter in the POM files? That would be > really useful! > > Thanks again, > > Brendan Haverlock > > -Original Message- > From: Wayne Fay [mailto:wayne...@gmail.com] > Sent: Friday, May 22, 2009 11:12 AM > To: Maven Users List > Subject: Re: Override dependency classes with another module's classes > > > Unfortunately, we are overriding classes from a dependency library, so we > > are just putting the classes in the same package and wanting our > overriding > > classes to get precedence on the classpath. So, our classes are in the > same > > package as the library's classes and have the same class name, we just > want > > ours to be used at compile time. > > This just won't work at all, at least not consistently. Build a > different jar containing just the classes you DON'T override, and > depend on it instead. > > Wayne > > - > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > > > > - > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > > - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
Re: Override dependency classes with another module's classes
I expected it would, yes. On Tue, May 26, 2009 at 10:54 AM, Brendan Haverlock wrote: > I am using 2.1.0, and it doesn't seem to make a difference which order I > put > them in. Based on what you said, shouldn't this be working in my version? > > Thanks, > > Brendan Haverlock > > -Original Message- > From: Brian Fox [mailto:bri...@infinity.nu] > Sent: Monday, May 25, 2009 3:19 PM > To: Maven Users List > Subject: Re: Override dependency classes with another module's classes > > The order in the poms is maintained as of 2.0.10, so you should be able to > affect the classpath by reordering the poms. > > 2009/5/22 Brendan Haverlock > > > Thanks Wayne...I just found a link to the other post about this: > > http://www.mail-archive.com/users@maven.apache.org/msg70079.html Thanks > > for not redirecting me to the "What is Maven" page. > > > > That seems like the only plausible solution to me for now. Is there any > > plan for making the dependency order matter in the POM files? That would > be > > really useful! > > > > Thanks again, > > > > Brendan Haverlock > > > > -----Original Message- > > From: Wayne Fay [mailto:wayne...@gmail.com] > > Sent: Friday, May 22, 2009 11:12 AM > > To: Maven Users List > > Subject: Re: Override dependency classes with another module's classes > > > > > Unfortunately, we are overriding classes from a dependency library, so > we > > > are just putting the classes in the same package and wanting our > > overriding > > > classes to get precedence on the classpath. So, our classes are in the > > same > > > package as the library's classes and have the same class name, we just > > want > > > ours to be used at compile time. > > > > This just won't work at all, at least not consistently. Build a > > different jar containing just the classes you DON'T override, and > > depend on it instead. > > > > Wayne > > > > - > > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > > For additional commands, e-mail: users-h...@maven.apache.org > > > > > > > > - > > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > > For additional commands, e-mail: users-h...@maven.apache.org > > > > > > > - > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > >
Re: Override dependency classes with another module's classes
Like Brian, I expected this would work right in 2.0.10 and 2.1.0, so I'm a bit surprised it didn't work. Having said that, let me remind you what I said earlier... ;-) > This just won't work at all, at least not consistently. Build a > different jar containing just the classes you DON'T override, and > depend on it instead. I've just run into too many odd problems as a result of trying to override classes like this that I simply refuse to go this route at this point. Making sure your jars are in the right order in Maven plus your Web container and any other environments you may use them in is just too much work when you can "solve" this pretty easily with your own build of the jar minus certain classes. Wayne On Tue, May 26, 2009 at 4:24 PM, Brian Fox wrote: > I expected it would, yes. > > On Tue, May 26, 2009 at 10:54 AM, Brendan Haverlock > wrote: > >> I am using 2.1.0, and it doesn't seem to make a difference which order I >> put >> them in. Based on what you said, shouldn't this be working in my version? >> >> Thanks, >> >> Brendan Haverlock > - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
RE: Override dependency classes with another module's classes
Well, I've tried switching the order of the two dependencies both ways and tried all sorts of different scopes and exclusions to try to get it to work, and I've had no success. Since both of you say it should work in the version I am using, can you take a look at my 2 dependencies and let me know if you see anything that stands out? Here are the 2 dependencies in my POM: com.sample queue-override 1.9.0-SNAPSHOT jar compile mule mule 1.2 jar compile So the module "A" that has these 2 dependencies is trying to use the implementations from the queue-override that overrides the packages/classes inside of mule. So: Queue-override has the classes: org.mule.util.queue.QueueSession, org.mule.util.queue.Queue And the mule package has the same classes minus a few methods. In module "A" when I try to use the methods I added in queue-override, no matter which way I order the dependencies, it doesn't see the new methods. Thanks! Brendan Haverlock -Original Message- From: Wayne Fay [mailto:wayne...@gmail.com] Sent: Tuesday, May 26, 2009 4:50 PM To: Maven Users List Subject: Re: Override dependency classes with another module's classes Like Brian, I expected this would work right in 2.0.10 and 2.1.0, so I'm a bit surprised it didn't work. Having said that, let me remind you what I said earlier... ;-) > This just won't work at all, at least not consistently. Build a > different jar containing just the classes you DON'T override, and > depend on it instead. I've just run into too many odd problems as a result of trying to override classes like this that I simply refuse to go this route at this point. Making sure your jars are in the right order in Maven plus your Web container and any other environments you may use them in is just too much work when you can "solve" this pretty easily with your own build of the jar minus certain classes. Wayne On Tue, May 26, 2009 at 4:24 PM, Brian Fox wrote: > I expected it would, yes. > > On Tue, May 26, 2009 at 10:54 AM, Brendan Haverlock > wrote: > >> I am using 2.1.0, and it doesn't seem to make a difference which order I >> put >> them in. Based on what you said, shouldn't this be working in my version? >> >> Thanks, >> >> Brendan Haverlock > - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
Re: Override dependency classes with another module's classes
> So the module "A" that has these 2 dependencies is trying to use the > implementations from the queue-override that overrides the packages/classes > inside of mule. So: Is Mule perhaps using OSGi or something to look up classes, so even though your artifacts/classes appear first in the classpath, they are getting ignored? What does "mvn help:effective-pom" show you? I'm not entirely convinced this is Maven performing badly but rather something more intricate going on... Might want to take this over to the Mule list to see what people there think. Wayne - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
RE: Override dependency classes with another module's classes
The version of Mule that we are using does not use OSGi, but that should be irrelevant because the problem is occurring at compile time. When I ran "mvn help:effective-pom," queue was still after mule and there was only one instance of each. It was quite large because it inherited a lot of dependencies from the parent project. Thanks, Brendan Haverlock -Original Message- From: Wayne Fay [mailto:wayne...@gmail.com] Sent: Wednesday, May 27, 2009 5:04 PM To: Maven Users List Subject: Re: Override dependency classes with another module's classes > So the module "A" that has these 2 dependencies is trying to use the > implementations from the queue-override that overrides the packages/classes > inside of mule. So: Is Mule perhaps using OSGi or something to look up classes, so even though your artifacts/classes appear first in the classpath, they are getting ignored? What does "mvn help:effective-pom" show you? I'm not entirely convinced this is Maven performing badly but rather something more intricate going on... Might want to take this over to the Mule list to see what people there think. Wayne - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org - To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
