[Topaz-dev] serializing Article from Session.get()

[Pradeep Krishnan]

Hi Russ,

Russell Uman wrote:
> tried it. patched fine.
> 
> i got new and interesting errors! 
> 
> we're still only able to share a single key between caches (the
> Annotation-info key) out of the 3 that are generated on
> fetchArticle.action.
> 
> i noticed that you added a logger to Session.java. i upped logging for
> org.topazproject to debug, but i did not see its log message after
> fetchArticle.
> 

Cool!

> [root at topaz01-multi ~]# grep "Serializable replacement"
> /var/log/topaz/plosone.log

Yes. See below as to why that is.

> [root at topaz01-multi ~]#
> 
> here's what i did get:
> 
> 2008-03-11 17:29:08,013 WARN  RMIAsynchronousCacheReplicator()> Unable
> to send message to remote peer.  Message was: error performing query:
> select $s $p $o\
>  subquery (select $t from <local:///topazproject#filter:model=profiles>
> where $o <rdf:type> $t) from <local:///topazproject#filter:model=ri>
> where $s $p $o \
> and $s <mulgara:is>
> <info:doi/10.1371/journal.pone.0000581/bibliographicCitation>; select $s
> $p $o subquery (select $t from <local:///topazproject#filter:mo\
> del=ri> where $s <rdf:type> $t) from
> <local:///topazproject#filter:model=ri> where $s $p $o and $o
> <mulgara:is> <info:doi/10.1371/journal.pone.0000581/bibli\
> ographicCitation>; [Replication Thread
> net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator]
> org.topazproject.otm.OtmException: error performing query: select $s $p
> $o subquery (select $t from
> <local:///topazproject#filter:model=profiles> where $o <\
> rdf:type> $t) from <local:///topazproject#filter:model=ri> where $s $p
> $o and $s <mulgara:is>
> <info:doi/10.1371/journal.pone.0000581/bibliographicCitation>;\
>  select $s $p $o subquery (select $t from
> <local:///topazproject#filter:model=ri> where $s <rdf:type> $t) from
> <local:///topazproject#filter:model=ri> where\
>  $s $p $o and $o <mulgara:is>
> <info:doi/10.1371/journal.pone.0000581/bibliographicCitation>;
>         at org.topazproject.otm.stores.ItqlStore.get(ItqlStore.java:333)
>         at org.topazproject.otm.Session.getFromStore(Session.java:596)
>         at org.topazproject.otm.Session.access$100(Session.java:45)
>         at org.topazproject.otm.Session$1.invoke(Session.java:736)
>         at
> org.plos.models.Citation_$$_javassist_6.writeReplace(Citation_$$_javassi
> st_6.java)

[snip]

Looks like the Citation object is a lazy loaded proxy that isn't loaded. 
For caching and serialization to work all proxies must be eager loaded 
or force loaded. Since you guys are using a fairly old version of OTM, 
the pub-app should have to manually force load all proxy associations 
before adding an object to the cache.

Cheers,
Pradeep