Peter Wyngaard pisze: > In a previous message(s), I mentioned that I created an internal-only > pipeline, cached with ExpiresCachingProcessingPipeline. This pipeline > supports many URLs that return objects from a database using SQL > Transformer. The caching is important, as many of the database > operations are time consuming. > > > > I've built several additional pipelines that aggregate and transform the > "raw" database XML returned by the caching internal-only pipeline. So > here's an abbreviated sitemap.xmap to illustrate the problem:
[...] > When I remove the type="caching" from the internal pipeline, everything > works great. I can access > http://localhost:8888/myblock/transformed-data.xml?param1={...}¶m2={...}&; > <http://localhost:8888/myblock/transformed-data.xml?param1=%7b...%7d¶m2=%7b...%7d&;>..., > and all is well. > > However, with the type="caching" in place, every other request for > transformed-data.xml fails with the following exception: > > Caused by: org.apache.cocoon.ProcessingException: Serializer already > set. Cannot set serializer 'xml' > > at <map:serialize type="xml"> - [at the <map:serializer …> line > in the internal-only pipeline] > > > > My current workaround is to replace: > > <map:generate src="cocoon:raw:/data?query_string=…" /> > > with: > > <map:aggregate element="dummy"> > <map:part src="cocoon:raw:/data?query_string=…" /> > </map:aggregate> > <map:transform src="remove-dummy.xsl" type="saxon" /> > > The remove-dummy.xsl just removes the <dummy>…</dummy> element that > map:aggregate adds. > > > > Is this a bug in Cocoon 2.2 trunk? Thanks for giving such detailed description of your problem. Looking at what you have written it looks like a bug (definitively not a feature) but it's a first time I see something like this. Have you tried to use caching pipeline but with simpler set of components (for example by removing SQLTransformer)? If the problem still persists I would suggest to make a bug report and attach a simple block showing buggy behaviour. Someone will definitively will need to have a look on this or at least give an advice how to track down the problem. -- Grzegorz Kossakowski Committer and PMC Member of Apache Cocoon http://reflectingonthevicissitudes.wordpress.com/ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
