[This followup was posted to gmane.comp.java.keel.devel and a copy was sent to
the cited author.]
Hi all,
this is my first contact with sequences and I think that there is a
problem with transfering data from one model of a sequence to its next
model.
This is a section of my system.xconf snippet:
<sequence id="testapp.sequence">
<model name="testapp.first-step" clearParams="false"/>
<model name="testapp.second-step" clearParams="false"/>
<model name="testapp.show-result"/>
</sequence>
All models in this sequence except for the last one doesn't have any
user interaction. During the execution of model "testapp.first-step" a
POJO will be created. My goal is to transfer this POJO as a parameter to
the model "testapp.second-step" where some calculation should take
place. Finally the model "testapp.show-result" shall display the result
of the calculation.
This is the execute method of model "testapp.first-step".
req.setParameter("pojo", new MyPojo(SomeInitialParameters));
return null;
And in model "testapp.second-step" I try this:
MyPojo myPojo = (MyPojo) req.getParameter("pojo");
// Do some calculation with myPojo and store the result
req.setParameter("result", new MyResult(SomeInitialParameters));
return null;
Finally the code of model "testapp.show-result":
ModelResponse res = req.createResponse();
MyResult result = (MyResult)req.getParameter("result");
res.addOutput("Value 1", result.getValue1());
//... more output added here
return res;
The problem: although I set "clearParams" in the sequence configuration
to "false" I'm not able to retrieve a MyPojo instance during the
execution of "testapp.second-step" (return value: null).
What went wrong?
By the way: if I use the ModelRequest's context get- and put-methods
instead of it's parameters everything is going to be alright. But I want
to avoid using such a "global data storage" as a model's interface.
Thanks in advance
Joern
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