Giacomo Pati pisze: > > > Grzegorz Kossakowski wrote: >> Giacomo Pati pisze: >> Giacomo, this issue caused frustration that affected all of us but I would >> like to ask you about a >> little more. Could you start my sample in a debugger and set breakpoint on >> put() method of >> ObjectModelImpl? Then could you analyse all calls to that method and figure >> out if they are >> operating on the same ObjectModelImpl class instance? >> You should debug with OM's scope set to request. The expected result is that >> during whole request >> processing (including making a servlet call) every method call should be on >> the same instance of OM. > > Every method call _is_ on the same instance. The put method gets called 3 > times with: > > 1. ObjId=68 key="java" > 2. ObjId=68 key="cocoon" > 3. ObjId=68 key="Packages"
Hmmm, it should be called more than three times because when executing http://localhost:8080/myBlock1/test the status variable should be put on OM. Is this a case? You can check it by putting breakpoint on org.apache.cocoon.components.flow.FlowHelper.setContextObject(). To give you better idea what we are searching for: I believe that your NPE is caused by the fact that flowscript puts status variable on one instance of OM and template from myBlock2 uses another instance of OM. You can set breakpoint on org.apache.cocoon.el.impl.jexl.JexlExpression.evaluate() to find out against which OM instance the expression is evaluated and what it contains. -- Grzegorz Kossakowski Committer and PMC Member of Apache Cocoon http://reflectingonthevicissitudes.wordpress.com/
