Eva,
You haven't given the stack trace of the error or much other context,
e.g. it looks like it should be coming from the dispatching thread
rather than from the consumer.
HOWEVER, to reinforce what Andrea said, you should not be putting an
object of any proprietary type into an Event. There are all sorts of
issues, for example the visibility of the class for that type, along
with the possibility that the event will be serialized and sent over
the network. Also events must be immutable because they are copied to
many consumers.
If you want to send structured information such as is contained in
your Measure object, then please deconstruct it into a combination of
String and primitive fields.
Regards,
Neil
On Tue, Mar 16, 2010 at 11:45 AM, Eva Madrazo
<eva.madr...@grpss.ssr.upm.es> wrote:
> Hi Miguel,
> thanks for the quick answer. In my org.osgi.service.event.Event
> implementation there isn't a constructor (String, Map) for the event object,
> there is a constructor that uses a Dictionary object instead .Nevertheless
> the rest is equivalent to my code.
> The events are posted, but it seems that it fails the conversion of the
> object included in the properties object. When I construct the properties I
> have:
>
> props.put("measure", (Measure)measure);
>
> But, when I retrieve this property from the event:
>
> Measure measure = (Measure) event.getProperty("measure");
>
> The error is launched ERROR - Exception while dispatching event
> org.osgi.service.event.Event [topic=topicName] to handler
> mypackage.simpleeventhand...@3e953e95
>
>
> .... any ideas?
> thanks!
>
>
> Date: Tue, 16 Mar 2010 11:31:05 +0100
> From: Miguel <migue...@gmail.com>
> Subject: Re: [osgi-dev] problem while receiving an Event
> To: OSGi Developer Mail List <osgi-dev@mail.osgi.org>
> Message-ID:
> <6ed2320c1003160331n73f54f20gc53935ade58a4...@mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> try to use event admin this way:
>
> String topic = "here_my_topic_to_be_filtered";
> Map properties = new Properties();
>
> [...]
>
> Event ev = new Event(topic, properties);
>
> and post the event this way:
>
> _eventAdmin.postEvent ( ev );
>
>
> where _eventAdmin is the service reference ...
>
>
>
> Miguel
>
>
> On Tue, Mar 16, 2010 at 11:20 AM, Eva Madrazo
> <eva.madr...@grpss.ssr.upm.es>wrote:
>
>
>> > Hi,
>> > maybe this is a very simple problem but I do not achieve to resolve it
>> > and
>> > I found difficult to find information about it, so sorry if this is
>> > being
>> > answered before. First of all I'm executing an equinox eRCP platform on
>> > a
>> > Windows Mobile 6.1 using J9.
>> >
>> > I have a very strange problem while receiving an Event. When posting
>> > the
>> > event I add a propietary object (Measure) to the hashtable props:
>> >
>> > Hashtable props = new Hashtable();
>> > props.put("measure", measure);
>> > eventAdmin.postEvent(new Event(measure.getName(), props));
>> >
>> > When receiving the event I want to extract this Measure object. If I do
>> > Object measure = (Object) event.getProperty("measure");
>> >
>> > no problem occur, but when I try to do:
>> >
>> > Measure measure = (Measure) event.getProperty("measure");
>> >
>> > I have this error in logs:
>> > ERROR - Exception while dispatching event org.osgi.service.event.Event
>> > [topic=topicName] to handler mypackage.simpleeventhand...@3e953e95
>> >
>> >
>> > I have check that the bundle imports the bundle with the definition of
>> > Measure object.
>> >
>> > I cannot imagine anything to change, please help me :) >
>> > Thank you very much,
>> > Eva
>> >
>
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