> Hello,
>
> Was wondering how or if this is possible - assuming the use of
> FullDuplex, but open to whatever works well.
>
> Goal:
> Have x number of clients subscribe to a WCF fullduplex over tcp
> service --
> lets say they subscribe to:
> DoIhaveMail()
>
> On the server side, lets say we have an object that is alerted when a
> sql table gets a new row, this object then invokes the
> IHaveMailOccured Event --
>
> If this new row added to the table was mail for user b, how do i
> callback only user b to say 'you have mail.' ?
>
> I have read about Publish/Subscribe using Callbacks, streams and MSMQ
> -- but its as tho the server alerts all clients who subscribed to that
> channel.
>
> Thanks in advance :-)
>

"Dominick Baier" wrote:

> Hi,
>
> sure -
>
> you either use the duplex support in WCF to store the CallbackChannels internally
> and call back through them whenever an event occurs.
>
> Or have your own infrastructure where the client news up a ServiceHost and
> you pass a callback URI to the service for later notification.
>
>
> -----
> Dominick Baier (http://www.leastprivilege.com)
>
> Developing More Secure Microsoft ASP.NET 2.0 Applications (http://www.microsoft.com/mspress/books/9989.asp)
>
> > Hello,
> >
> > Was wondering how or if this is possible - assuming the use of
> > FullDuplex, but open to whatever works well.
> >
> > Goal:
> > Have x number of clients subscribe to a WCF fullduplex over tcp
> > service --
> > lets say they subscribe to:
> > DoIhaveMail()
> >
> > On the server side, lets say we have an object that is alerted when a
> > sql table gets a new row, this object then invokes the
> > IHaveMailOccured Event --
> >
> > If this new row added to the table was mail for user b, how do i
> > callback only user b to say 'you have mail.' ?
> >
> > I have read about Publish/Subscribe using Callbacks, streams and MSMQ
> > -- but its as tho the server alerts all clients who subscribed to that
> > channel.
> >
> > Thanks in advance :-)
> >
>
>
>

> Hello Dominick, thank you so much for your response.
>
> Questions tho:
>
> " you either use the duplex support in WCF to store the
> CallbackChannels internally  and call back through them whenever an
> event occurs."
>
> If we have a callback that users subscribe to, how do we alert only a
> particular client named 'flappy' that has subscribed to the callback?
>
> "Or have your own infrastructure where the client news up a
> ServiceHost and you pass a callback URI to the service for later
> notification."
>
> Im still missing the part of how to raise the event for only a
> specific user - or am i thinking too hard? ie:
>
> For instance if 3 users subscribed to the event SomethingHappened();
> How can i say raise the event SomethingHappened() only for user number
> 2?
>
> For some reason im having a hard time grasping how this would actually
> work.
>
> Thanks again for your comments, i hope to hear more :-)
>
> "Dominick Baier" wrote:
>
>> Hi,
>>
>> sure -
>>
>> you either use the duplex support in WCF to store the
>> CallbackChannels internally and call back through them whenever an
>> event occurs.
>>
>> Or have your own infrastructure where the client news up a
>> ServiceHost and you pass a callback URI to the service for later
>> notification.
>>
>> -----
>> Dominick Baier (http://www.leastprivilege.com)
>> Developing More Secure Microsoft ASP.NET 2.0 Applications
>> (http://www.microsoft.com/mspress/books/9989.asp)
>>
>>> Hello,
>>>
>>> Was wondering how or if this is possible - assuming the use of
>>> FullDuplex, but open to whatever works well.
>>>
>>> Goal:
>>> Have x number of clients subscribe to a WCF fullduplex over tcp
>>> service --
>>> lets say they subscribe to:
>>> DoIhaveMail()
>>> On the server side, lets say we have an object that is alerted when
>>> a sql table gets a new row, this object then invokes the
>>> IHaveMailOccured Event --
>>>
>>> If this new row added to the table was mail for user b, how do i
>>> callback only user b to say 'you have mail.' ?
>>>
>>> I have read about Publish/Subscribe using Callbacks, streams and
>>> MSMQ -- but its as tho the server alerts all clients who subscribed
>>> to that channel.
>>>
>>> Thanks in advance :-)
>>>

:-)



"Dominick Baier" wrote:

> how about storing the callback reference in a dictionary<string, channel>
> that maps the user to a callback channel?
>
>
> -----
> Dominick Baier (http://www.leastprivilege.com)
>
> Developing More Secure Microsoft ASP.NET 2.0 Applications (http://www.microsoft.com/mspress/books/9989.asp)
>
> > Hello Dominick, thank you so much for your response.
> >
> > Questions tho:
> >
> > " you either use the duplex support in WCF to store the
> > CallbackChannels internally  and call back through them whenever an
> > event occurs."
> >
> > If we have a callback that users subscribe to, how do we alert only a
> > particular client named 'flappy' that has subscribed to the callback?
> >
> > "Or have your own infrastructure where the client news up a
> > ServiceHost and you pass a callback URI to the service for later
> > notification."
> >
> > Im still missing the part of how to raise the event for only a
> > specific user - or am i thinking too hard? ie:
> >
> > For instance if 3 users subscribed to the event SomethingHappened();
> > How can i say raise the event SomethingHappened() only for user number
> > 2?
> >
> > For some reason im having a hard time grasping how this would actually
> > work.
> >
> > Thanks again for your comments, i hope to hear more :-)
> >
> > "Dominick Baier" wrote:
> >
> >> Hi,
> >>
> >> sure -
> >>
> >> you either use the duplex support in WCF to store the
> >> CallbackChannels internally and call back through them whenever an
> >> event occurs.
> >>
> >> Or have your own infrastructure where the client news up a
> >> ServiceHost and you pass a callback URI to the service for later
> >> notification.
> >>
> >> -----
> >> Dominick Baier (http://www.leastprivilege.com)
> >> Developing More Secure Microsoft ASP.NET 2.0 Applications
> >> (http://www.microsoft.com/mspress/books/9989.asp)
> >>
> >>> Hello,
> >>>
> >>> Was wondering how or if this is possible - assuming the use of
> >>> FullDuplex, but open to whatever works well.
> >>>
> >>> Goal:
> >>> Have x number of clients subscribe to a WCF fullduplex over tcp
> >>> service --
> >>> lets say they subscribe to:
> >>> DoIhaveMail()
> >>> On the server side, lets say we have an object that is alerted when
> >>> a sql table gets a new row, this object then invokes the
> >>> IHaveMailOccured Event --
> >>>
> >>> If this new row added to the table was mail for user b, how do i
> >>> callback only user b to say 'you have mail.' ?
> >>>
> >>> I have read about Publish/Subscribe using Callbacks, streams and
> >>> MSMQ -- but its as tho the server alerts all clients who subscribed
> >>> to that channel.
> >>>
> >>> Thanks in advance :-)
> >>>
>
>
>

> OK, this may be the part i was missing.  So each CallBackChannel is
> specific to only one user?
>
> :-)
>
> "Dominick Baier" wrote:
>
>> how about storing the callback reference in a dictionary<string,
>> channel> that maps the user to a callback channel?
>>
>> -----
>> Dominick Baier (http://www.leastprivilege.com)
>> Developing More Secure Microsoft ASP.NET 2.0 Applications
>> (http://www.microsoft.com/mspress/books/9989.asp)
>>
>>> Hello Dominick, thank you so much for your response.
>>>
>>> Questions tho:
>>>
>>> " you either use the duplex support in WCF to store the
>>> CallbackChannels internally  and call back through them whenever an
>>> event occurs."
>>>
>>> If we have a callback that users subscribe to, how do we alert only
>>> a particular client named 'flappy' that has subscribed to the
>>> callback?
>>>
>>> "Or have your own infrastructure where the client news up a
>>> ServiceHost and you pass a callback URI to the service for later
>>> notification."
>>>
>>> Im still missing the part of how to raise the event for only a
>>> specific user - or am i thinking too hard? ie:
>>>
>>> For instance if 3 users subscribed to the event SomethingHappened();
>>> How can i say raise the event SomethingHappened() only for user
>>> number 2?
>>>
>>> For some reason im having a hard time grasping how this would
>>> actually work.
>>>
>>> Thanks again for your comments, i hope to hear more :-)
>>>
>>> "Dominick Baier" wrote:
>>>
>>>> Hi,
>>>>
>>>> sure -
>>>>
>>>> you either use the duplex support in WCF to store the
>>>> CallbackChannels internally and call back through them whenever an
>>>> event occurs.
>>>>
>>>> Or have your own infrastructure where the client news up a
>>>> ServiceHost and you pass a callback URI to the service for later
>>>> notification.
>>>>
>>>> -----
>>>> Dominick Baier (http://www.leastprivilege.com)
>>>> Developing More Secure Microsoft ASP.NET 2.0 Applications
>>>> (http://www.microsoft.com/mspress/books/9989.asp)
>>>>> Hello,
>>>>>
>>>>> Was wondering how or if this is possible - assuming the use of
>>>>> FullDuplex, but open to whatever works well.
>>>>>
>>>>> Goal:
>>>>> Have x number of clients subscribe to a WCF fullduplex over tcp
>>>>> service --
>>>>> lets say they subscribe to:
>>>>> DoIhaveMail()
>>>>> On the server side, lets say we have an object that is alerted
>>>>> when
>>>>> a sql table gets a new row, this object then invokes the
>>>>> IHaveMailOccured Event --
>>>>> If this new row added to the table was mail for user b, how do i
>>>>> callback only user b to say 'you have mail.' ?
>>>>>
>>>>> I have read about Publish/Subscribe using Callbacks, streams and
>>>>> MSMQ -- but its as tho the server alerts all clients who
>>>>> subscribed to that channel.
>>>>>
>>>>> Thanks in advance :-)
>>>>>

"Dominick Baier" wrote:

> yep ;)
> -----
> Dominick Baier (http://www.leastprivilege.com)
>
> Developing More Secure Microsoft ASP.NET 2.0 Applications (http://www.microsoft.com/mspress/books/9989.asp)
>
> > OK, this may be the part i was missing.  So each CallBackChannel is
> > specific to only one user?
> >
> > :-)
> >
> > "Dominick Baier" wrote:
> >
> >> how about storing the callback reference in a dictionary<string,
> >> channel> that maps the user to a callback channel?
> >>
> >> -----
> >> Dominick Baier (http://www.leastprivilege.com)
> >> Developing More Secure Microsoft ASP.NET 2.0 Applications
> >> (http://www.microsoft.com/mspress/books/9989.asp)
> >>
> >>> Hello Dominick, thank you so much for your response.
> >>>
> >>> Questions tho:
> >>>
> >>> " you either use the duplex support in WCF to store the
> >>> CallbackChannels internally  and call back through them whenever an
> >>> event occurs."
> >>>
> >>> If we have a callback that users subscribe to, how do we alert only
> >>> a particular client named 'flappy' that has subscribed to the
> >>> callback?
> >>>
> >>> "Or have your own infrastructure where the client news up a
> >>> ServiceHost and you pass a callback URI to the service for later
> >>> notification."
> >>>
> >>> Im still missing the part of how to raise the event for only a
> >>> specific user - or am i thinking too hard? ie:
> >>>
> >>> For instance if 3 users subscribed to the event SomethingHappened();
> >>> How can i say raise the event SomethingHappened() only for user
> >>> number 2?
> >>>
> >>> For some reason im having a hard time grasping how this would
> >>> actually work.
> >>>
> >>> Thanks again for your comments, i hope to hear more :-)
> >>>
> >>> "Dominick Baier" wrote:
> >>>
> >>>> Hi,
> >>>>
> >>>> sure -
> >>>>
> >>>> you either use the duplex support in WCF to store the
> >>>> CallbackChannels internally and call back through them whenever an
> >>>> event occurs.
> >>>>
> >>>> Or have your own infrastructure where the client news up a
> >>>> ServiceHost and you pass a callback URI to the service for later
> >>>> notification.
> >>>>
> >>>> -----
> >>>> Dominick Baier (http://www.leastprivilege.com)
> >>>> Developing More Secure Microsoft ASP.NET 2.0 Applications
> >>>> (http://www.microsoft.com/mspress/books/9989.asp)
> >>>>> Hello,
> >>>>>
> >>>>> Was wondering how or if this is possible - assuming the use of
> >>>>> FullDuplex, but open to whatever works well.
> >>>>>
> >>>>> Goal:
> >>>>> Have x number of clients subscribe to a WCF fullduplex over tcp
> >>>>> service --
> >>>>> lets say they subscribe to:
> >>>>> DoIhaveMail()
> >>>>> On the server side, lets say we have an object that is alerted
> >>>>> when
> >>>>> a sql table gets a new row, this object then invokes the
> >>>>> IHaveMailOccured Event --
> >>>>> If this new row added to the table was mail for user b, how do i
> >>>>> callback only user b to say 'you have mail.' ?
> >>>>>
> >>>>> I have read about Publish/Subscribe using Callbacks, streams and
> >>>>> MSMQ -- but its as tho the server alerts all clients who
> >>>>> subscribed to that channel.
> >>>>>
> >>>>> Thanks in advance :-)
> >>>>>
>
>
>