Remoting help - CannotResolveClassException

[Tim Jacomb]

Hi all,

I'm currently working on pluggable storage for the Junit plugin

It works properly in the junit plugin with the h2 database plugin as a mock implementation.

When I try to implement it with the postgresql database plugin I'm getting CannotResolveClassException when I run it in pipeline.

I'm using a subclass of MasterToSlaveFileCallable and the class which is constructing the object is captured in it's parameters:

https://github.com/timja/junit-plugin/blob/external-storage-v2/src/main/java/hudson/tasks/junit/JUnitParser.java#L112

(PR https://github.com/jenkinsci/junit-plugin/pull/141/files)

(RemotePublisher)

The line that is failing is: https://github.com/timja/jenkins-junit-postgresql-plugin/blob/master/src/main/java/io/jenkins/plugins/junit/postgresql/RemoteConnectionSupplier.java#L20

This is a test that show's it working for h2:

https://github.com/timja/junit-plugin/blob/external-storage-v2/src/test/java/hudson/tasks/junit/storage/TestResultStorageTest.java#L99

Pipeline script: https://gist.github.com/timja/e4b001a528302978f5a0224f894fb182

Full stacktrace: https://gist.github.com/timja/2f18472576a2c02dc9776953a30bb8d2

Shortened:

com.thoughtworks.xstream.mapper.CannotResolveClassException: org.jenkinsci.plugins.database.postgresql.PostgreSQLDatabase
	at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:79)
	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)

Any thoughts?

I've done some googling but the docs are not the best in this area

Thanks

Tim

[Tim Jacomb]

I was able to make it work by marking AbstractRemoteDatabase.java as Serialiseable and passing the instance rather than doing the Xstream serialise to xml and deserialise.

 Still would be interested if anyone knows:

1. how to make it work in this way

2. why it works for the h2 database in the junit plugin?

Thanks

Tim

[Jesse Glick]

On Sun, Aug 16, 2020 at 10:04 AM Tim Jacomb <timja...@gmail.com> wrote:
> The line that is failing is: https://github.com/timja/jenkins-junit-postgresql-plugin/blob/master/src/main/java/io/jenkins/plugins/junit/postgresql/RemoteConnectionSupplier.java#L20

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