Hi Masahiro,
We'll work on improving the generated TODOs in XXXResource#init().
My answer to #2 is inline below.
Regards,
Ian
[EMAIL PROTECTED] wrote:
Hello.
As to fisrt question, I found a solution from email exchanges between
Ian and Gennady. I understand addTopicSpace() should be called at
FilesystemResource.init() as was expected. Anyway, please condier
some 'TODO' comments in WsnWsdl2Java-generated source or implementation
in given 'filesys_resource_init.txt'.
Second one remains.
Thanks.
---
Hello.
My name is Masahiro Kurosawa.
I have two questions, one is about FileSystem example and another is WSN
implementation of Hermes.
(1) m_topicSpaceSet.addTopicSpace() is never called in
AbstractFilesystemResource/FilesystemResource class, so I think no topics
are registered to Filesystem resource after calling
TopicUtils.initNotificationProducerProperties at
FilesystemResource.init().
Is that right? If so, a 'TODO' comment should be added to show developers
that this fact.
(2) WS-Topics specification says a NotificationProducer can support one or
more Topics from multiple Topic Spaces and entire Topic Tree, or just a
subset of the Topics in that Topic Tree. Concept of TopicSpaceSet
interface and TopicUtils class, however, seem be against this description
because all topics of paticular Topic Space are registerd to the topic
set of the NotificationProducer.
I feel TopicList of Globus Toolkit 4 was easier to use.
Or I'm misunderstanding the spec?
Your understanding of the spec is correct. I have also been thinking of
the issue that you bring up - that the current APIs don't allow you to add
a subtree of a TopicSpace. I have some ideas on how to remedy this. The
tricky part will be getting the topic expression evaluators to work
correctly when evaluating against a topic set that contains subtrees,
particularly subtrees that do not have a root topic as their root node;
this will be tricky because topic expressions are always relative to the
root of a topic space.
For now, note that you can build up a TopicSpace that contains only select
root topics, rather than all of them. Also, we've added a "visible" flag
on the Topic interface that tells
TopicUtils#initNotificationProducerProperties() not to advertise that
topic via the wsnt:Topic resource property (not sure if this feature made
it into 1.0 beta though).
At last, a lot of thanks for reading my poor English :-)p
Regards.
-----
Masahiro Kurosawa
- Hitachi, Ltd., Software Divisition
- [EMAIL PROTECTED]
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