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Posted to user@hivemind.apache.org by Igor Laberov <ig...@qlusters.com> on 2005/04/27 13:33:46 UTC
Multiple implementations for service
Hi again,
In our application we want to have multiple implementation classes for
one service. So .xml file will look like
<service-point id="Part" />
<implementation service-id="Part">
<create-instance class="one.PartImpl"/>
</implementation>
<implementation service-id="Part">
<create-instance class="two.PartImpl"/>
</implementation>
At startup user will choose implementation that he want to work with
(and its id will be stored), and later user operations will be
associated with selected implementation.
As I see from RegistryBuilder code, it is not allowed to have 2
implementation.
Can you point me to other way having several service implementation? Or
may be I can override some system service?
Thank you,
Igor Laberov
Qlusters, Inc.
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Re: Multiple implementations for service
Posted by Johan Lindquist <jo...@kawoo.co.uk>.
Igor,
You can have two service implementations, just now with the same service
id. And the user can then choose which service to use (and retrieve)
using the different ids.
Johan
On 28 Apr 2005 17:10:49 +0300, Igor Laberov <ig...@qlusters.com> wrote:
> These 2 options don't allow to have more than one service implementation
> in the same time.
> Current Registry interface doesn't allow this, because it have only
> getService() that returns single implementation only.
>
> Is it possible to override Registry service?
>
> Thanks,
> Igor
>
> On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
>> Two options - have two service points (same service interface is
>> allowed,
>> just name the service point will be have to differ) or use the override
>> functionality (http://jakarta.apache.org/hivemind/current/override.html)
>>
>> Cheers,
>>
>> Johan
>>
>> On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com> wrote:
>>
>> > Hi again,
>> > In our application we want to have multiple implementation classes for
>> > one service. So .xml file will look like
>> > <service-point id="Part" />
>> > <implementation service-id="Part">
>> > <create-instance class="one.PartImpl"/>
>> > </implementation>
>> > <implementation service-id="Part">
>> > <create-instance class="two.PartImpl"/>
>> > </implementation>
>> >
>> > At startup user will choose implementation that he want to work with
>> > (and its id will be stored), and later user operations will be
>> > associated with selected implementation.
>> >
>> > As I see from RegistryBuilder code, it is not allowed to have 2
>> > implementation.
>> > Can you point me to other way having several service implementation?
>> Or
>> > may be I can override some system service?
>> >
>> > Thank you,
>> > Igor Laberov
>> > Qlusters, Inc.
>> >
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
>> >
>> >
>>
>>
>>
>> --
>> you too?
>>
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>>
>
>
>
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Re: Multiple implementations for service
Posted by Johan Lindquist <jo...@kawoo.co.uk>.
That would be better - even better yet would be to return a hint defined
by the implementation (in addition to the service id) ... But that would
mean additions to the service schema definitions, which is a bigger job ...
Johan
On Thu, 28 Apr 2005 11:09:08 -0400, James Carman
<ja...@carmanconsulting.com> wrote:
> Johan,
>
> I imagined that the return values would be serviceIds. So, the method
> name
> would be better as...
>
> public List getServiceIds( Class serviceInterface );
>
> That would be quite trivial to do.
>
> James
>
> -----Original Message-----
> From: Johan Lindquist [mailto:johan@kawoo.co.uk]
> Sent: Thursday, April 28, 2005 11:08 AM
> To: hivemind-user@jakarta.apache.org
> Subject: Re: Multiple implementations for service
>
>
> If you got a list of interfaces, which instance would you use in that
> case? The criteria for the service that you are interested need to be
> specified somehow (as james mentions)
>
> You can solve this to an extent by defining a configuration point that
> collects all service instances and allow you to write a factory that
> provides the implementations that you need:
>
> FooFactory fooFactory = registry.getService(FooFactory.class);
> Foo foo = (Foo)fooFactory.getFoo(<some-criteria>)
>
> Johan
>
> On 28 Apr 2005 17:51:31 +0300, Igor Laberov <ig...@qlusters.com> wrote:
>
>> Now I see your point, it much more clear now :)
>>
>> The only issue that is still opened - ability to get list of services
>> that implement the same interface, something like that:
>> public List getServices(Class interfaceClass){
>> List l = (List) _servicePointsByInterface.get(interfaceClass);
>> return l;
>> }
>>
>> Is it possible to add getServices(Class) to Registry interface?
>>
>> On Thu, 2005-04-28 at 17:19, James Carman wrote:
>>> So, you want to allow the users to choose which implementation type
>>> they want, right? Then, define two different service points with the
>>> same interface, but give them different ids (of course) corresponding
>>> to the different implementations. Another approach would involve
>>> writing
> your
>>> own
>>> service model which chooses which implementation type to instantiate
>>> using
>>> some sort of thread-local parameter (which you'd have to set prior to
>>> invoking of course).
>>>
>>> -----Original Message-----
>>> From: Igor Laberov [mailto:igorl@qlusters.com]
>>> Sent: Thursday, April 28, 2005 10:11 AM
>>> To: hivemind-user@jakarta.apache.org
>>> Subject: Re: Multiple implementations for service
>>>
>>>
>>> These 2 options don't allow to have more than one service
>>> implementation in
>>> the same time. Current Registry interface doesn't allow this, because
>>> it
>>> have only
>>> getService() that returns single implementation only.
>>>
>>> Is it possible to override Registry service?
>>>
>>> Thanks,
>>> Igor
>>>
>>> On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
>>> > Two options - have two service points (same service interface is
>>> > allowed, just name the service point will be have to differ) or use
>>> > the
>>> override
>>> > functionality
>>> (http://jakarta.apache.org/hivemind/current/override.html)
>>> >
>>> > Cheers,
>>> >
>>> > Johan
>>> >
>>> > On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com>
>>> > wrote:
>>> >
>>> > > Hi again,
>>> > > In our application we want to have multiple implementation
>>> > > classes for one service. So .xml file will look like
>>> > > <service-point id="Part" /> <implementation service-id="Part">
>>> > > <create-instance class="one.PartImpl"/> </implementation>
>>> > > <implementation service-id="Part">
>>> > > <create-instance class="two.PartImpl"/>
>>> > > </implementation>
>>> > >
>>> > > At startup user will choose implementation that he want to work
>>> > > with (and its id will be stored), and later user operations will
>>> > > be associated with selected implementation.
>>> > >
>>> > > As I see from RegistryBuilder code, it is not allowed to have 2
>>> > > implementation. Can you point me to other way having several
>>> > > service implementation? Or may be I can override some system
>>> > > service?
>>> > >
>>> > > Thank you,
>>> > > Igor Laberov
>>> > > Qlusters, Inc.
>>> > >
>>> > >
>>> > >
>>> > > -----------------------------------------------------------------
>>> > > ---
>>> > > -
>>> > > To unsubscribe, e-mail:
>>> hivemind-user-unsubscribe@jakarta.apache.org
>>> > > For additional commands, e-mail:
>>> hivemind-user-help@jakarta.apache.org
>>> > >
>>> > >
>>> >
>>> >
>>> >
>>> > --
>>> > you too?
>>> >
>>> > -------------------------------------------------------------------
>>> > --
>>> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>>> > For additional commands, e-mail:
>>> hivemind-user-help@jakarta.apache.org
>>> >
>>>
>>>
>>>
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>>
>>
>>
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RE: Multiple implementations for service
Posted by James Carman <ja...@carmanconsulting.com>.
Johan,
I imagined that the return values would be serviceIds. So, the method name
would be better as...
public List getServiceIds( Class serviceInterface );
That would be quite trivial to do.
James
-----Original Message-----
From: Johan Lindquist [mailto:johan@kawoo.co.uk]
Sent: Thursday, April 28, 2005 11:08 AM
To: hivemind-user@jakarta.apache.org
Subject: Re: Multiple implementations for service
If you got a list of interfaces, which instance would you use in that
case? The criteria for the service that you are interested need to be
specified somehow (as james mentions)
You can solve this to an extent by defining a configuration point that
collects all service instances and allow you to write a factory that
provides the implementations that you need:
FooFactory fooFactory = registry.getService(FooFactory.class);
Foo foo = (Foo)fooFactory.getFoo(<some-criteria>)
Johan
On 28 Apr 2005 17:51:31 +0300, Igor Laberov <ig...@qlusters.com> wrote:
> Now I see your point, it much more clear now :)
>
> The only issue that is still opened - ability to get list of services
> that implement the same interface, something like that:
> public List getServices(Class interfaceClass){
> List l = (List) _servicePointsByInterface.get(interfaceClass);
> return l;
> }
>
> Is it possible to add getServices(Class) to Registry interface?
>
> On Thu, 2005-04-28 at 17:19, James Carman wrote:
>> So, you want to allow the users to choose which implementation type
>> they want, right? Then, define two different service points with the
>> same interface, but give them different ids (of course) corresponding
>> to the different implementations. Another approach would involve writing
your
>> own
>> service model which chooses which implementation type to instantiate
>> using
>> some sort of thread-local parameter (which you'd have to set prior to
>> invoking of course).
>>
>> -----Original Message-----
>> From: Igor Laberov [mailto:igorl@qlusters.com]
>> Sent: Thursday, April 28, 2005 10:11 AM
>> To: hivemind-user@jakarta.apache.org
>> Subject: Re: Multiple implementations for service
>>
>>
>> These 2 options don't allow to have more than one service
>> implementation in
>> the same time. Current Registry interface doesn't allow this, because it
>> have only
>> getService() that returns single implementation only.
>>
>> Is it possible to override Registry service?
>>
>> Thanks,
>> Igor
>>
>> On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
>> > Two options - have two service points (same service interface is
>> > allowed, just name the service point will be have to differ) or use
>> > the
>> override
>> > functionality
>> (http://jakarta.apache.org/hivemind/current/override.html)
>> >
>> > Cheers,
>> >
>> > Johan
>> >
>> > On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com>
>> > wrote:
>> >
>> > > Hi again,
>> > > In our application we want to have multiple implementation
>> > > classes for one service. So .xml file will look like
>> > > <service-point id="Part" /> <implementation service-id="Part">
>> > > <create-instance class="one.PartImpl"/> </implementation>
>> > > <implementation service-id="Part">
>> > > <create-instance class="two.PartImpl"/>
>> > > </implementation>
>> > >
>> > > At startup user will choose implementation that he want to work
>> > > with (and its id will be stored), and later user operations will
>> > > be associated with selected implementation.
>> > >
>> > > As I see from RegistryBuilder code, it is not allowed to have 2
>> > > implementation. Can you point me to other way having several
>> > > service implementation? Or may be I can override some system
>> > > service?
>> > >
>> > > Thank you,
>> > > Igor Laberov
>> > > Qlusters, Inc.
>> > >
>> > >
>> > >
>> > > -----------------------------------------------------------------
>> > > ---
>> > > -
>> > > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> > > For additional commands, e-mail:
>> hivemind-user-help@jakarta.apache.org
>> > >
>> > >
>> >
>> >
>> >
>> > --
>> > you too?
>> >
>> > -------------------------------------------------------------------
>> > --
>> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
>> >
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail:
>> hivemind-user-help@jakarta.apache.org
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail:
>> hivemind-user-help@jakarta.apache.org
>>
>
>
>
> ---------------------------------------------------------------------
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Re: Multiple implementations for service
Posted by Johan Lindquist <jo...@kawoo.co.uk>.
If you got a list of interfaces, which instance would you use in that
case? The criteria for the service that you are interested need to be
specified somehow (as james mentions)
You can solve this to an extent by defining a configuration point that
collects all service instances and allow you to write a factory that
provides the implementations that you need:
FooFactory fooFactory = registry.getService(FooFactory.class);
Foo foo = (Foo)fooFactory.getFoo(<some-criteria>)
Johan
On 28 Apr 2005 17:51:31 +0300, Igor Laberov <ig...@qlusters.com> wrote:
> Now I see your point, it much more clear now :)
>
> The only issue that is still opened - ability to get list of services
> that implement the same interface, something like that:
> public List getServices(Class interfaceClass){
> List l = (List) _servicePointsByInterface.get(interfaceClass);
> return l;
> }
>
> Is it possible to add getServices(Class) to Registry interface?
>
> On Thu, 2005-04-28 at 17:19, James Carman wrote:
>> So, you want to allow the users to choose which implementation type they
>> want, right? Then, define two different service points with the same
>> interface, but give them different ids (of course) corresponding to the
>> different implementations. Another approach would involve writing your
>> own
>> service model which chooses which implementation type to instantiate
>> using
>> some sort of thread-local parameter (which you'd have to set prior to
>> invoking of course).
>>
>> -----Original Message-----
>> From: Igor Laberov [mailto:igorl@qlusters.com]
>> Sent: Thursday, April 28, 2005 10:11 AM
>> To: hivemind-user@jakarta.apache.org
>> Subject: Re: Multiple implementations for service
>>
>>
>> These 2 options don't allow to have more than one service
>> implementation in
>> the same time. Current Registry interface doesn't allow this, because it
>> have only
>> getService() that returns single implementation only.
>>
>> Is it possible to override Registry service?
>>
>> Thanks,
>> Igor
>>
>> On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
>> > Two options - have two service points (same service interface is
>> > allowed,
>> > just name the service point will be have to differ) or use the
>> override
>> > functionality
>> (http://jakarta.apache.org/hivemind/current/override.html)
>> >
>> > Cheers,
>> >
>> > Johan
>> >
>> > On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com>
>> > wrote:
>> >
>> > > Hi again,
>> > > In our application we want to have multiple implementation classes
>> > > for one service. So .xml file will look like <service-point
>> > > id="Part" /> <implementation service-id="Part">
>> > > <create-instance class="one.PartImpl"/>
>> > > </implementation>
>> > > <implementation service-id="Part">
>> > > <create-instance class="two.PartImpl"/>
>> > > </implementation>
>> > >
>> > > At startup user will choose implementation that he want to work with
>> > > (and its id will be stored), and later user operations will be
>> > > associated with selected implementation.
>> > >
>> > > As I see from RegistryBuilder code, it is not allowed to have 2
>> > > implementation. Can you point me to other way having several service
>> > > implementation? Or may be I can override some system service?
>> > >
>> > > Thank you,
>> > > Igor Laberov
>> > > Qlusters, Inc.
>> > >
>> > >
>> > >
>> > > --------------------------------------------------------------------
>> > > -
>> > > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> > > For additional commands, e-mail:
>> hivemind-user-help@jakarta.apache.org
>> > >
>> > >
>> >
>> >
>> >
>> > --
>> > you too?
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
>> >
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
>>
>>
>>
>> ---------------------------------------------------------------------
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>>
>
>
>
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RE: Multiple implementations for service
Posted by James Carman <ja...@carmanconsulting.com>.
Yes, of course it's possible, and it would take all of about 20 mins to
implement (if it's as easy as I think it is). The question would be whether
the other committers feel that it's worthy of inclusion. It sounds
reasonable enough to me, since we already added the containsService( Class )
method. Why don't you fill out a JIRA request and we'll discuss. You've
got my vote. :-) If the others agree, I'll implement it myself for you
sometime by EOD today. Ok?
-----Original Message-----
From: Igor Laberov [mailto:igorl@qlusters.com]
Sent: Thursday, April 28, 2005 10:52 AM
To: hivemind-user@jakarta.apache.org
Subject: RE: Multiple implementations for service
Now I see your point, it much more clear now :)
The only issue that is still opened - ability to get list of services that
implement the same interface, something like that:
public List getServices(Class interfaceClass){
List l = (List) _servicePointsByInterface.get(interfaceClass);
return l;
}
Is it possible to add getServices(Class) to Registry interface?
On Thu, 2005-04-28 at 17:19, James Carman wrote:
> So, you want to allow the users to choose which implementation type
> they want, right? Then, define two different service points with the
> same interface, but give them different ids (of course) corresponding
> to the different implementations. Another approach would involve
> writing your own service model which chooses which implementation type
> to instantiate using some sort of thread-local parameter (which you'd
> have to set prior to invoking of course).
>
> -----Original Message-----
> From: Igor Laberov [mailto:igorl@qlusters.com]
> Sent: Thursday, April 28, 2005 10:11 AM
> To: hivemind-user@jakarta.apache.org
> Subject: Re: Multiple implementations for service
>
>
> These 2 options don't allow to have more than one service
> implementation in the same time. Current Registry interface doesn't
> allow this, because it have only
> getService() that returns single implementation only.
>
> Is it possible to override Registry service?
>
> Thanks,
> Igor
>
> On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
> > Two options - have two service points (same service interface is
> > allowed,
> > just name the service point will be have to differ) or use the override
> > functionality (http://jakarta.apache.org/hivemind/current/override.html)
> >
> > Cheers,
> >
> > Johan
> >
> > On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com>
> > wrote:
> >
> > > Hi again,
> > > In our application we want to have multiple implementation classes
> > > for one service. So .xml file will look like <service-point
> > > id="Part" /> <implementation service-id="Part">
> > > <create-instance class="one.PartImpl"/>
> > > </implementation>
> > > <implementation service-id="Part">
> > > <create-instance class="two.PartImpl"/>
> > > </implementation>
> > >
> > > At startup user will choose implementation that he want to work
> > > with
> > > (and its id will be stored), and later user operations will be
> > > associated with selected implementation.
> > >
> > > As I see from RegistryBuilder code, it is not allowed to have 2
> > > implementation. Can you point me to other way having several service
> > > implementation? Or may be I can override some system service?
> > >
> > > Thank you,
> > > Igor Laberov
> > > Qlusters, Inc.
> > >
> > >
> > >
> > > ------------------------------------------------------------------
> > > --
> > > -
> > > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> > >
> > >
> >
> >
> >
> > --
> > you too?
> >
> > --------------------------------------------------------------------
> > -
> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> >
>
>
>
> ---------------------------------------------------------------------
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>
>
>
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RE: Multiple implementations for service
Posted by Igor Laberov <ig...@qlusters.com>.
Now I see your point, it much more clear now :)
The only issue that is still opened - ability to get list of services
that implement the same interface, something like that:
public List getServices(Class interfaceClass){
List l = (List) _servicePointsByInterface.get(interfaceClass);
return l;
}
Is it possible to add getServices(Class) to Registry interface?
On Thu, 2005-04-28 at 17:19, James Carman wrote:
> So, you want to allow the users to choose which implementation type they
> want, right? Then, define two different service points with the same
> interface, but give them different ids (of course) corresponding to the
> different implementations. Another approach would involve writing your own
> service model which chooses which implementation type to instantiate using
> some sort of thread-local parameter (which you'd have to set prior to
> invoking of course).
>
> -----Original Message-----
> From: Igor Laberov [mailto:igorl@qlusters.com]
> Sent: Thursday, April 28, 2005 10:11 AM
> To: hivemind-user@jakarta.apache.org
> Subject: Re: Multiple implementations for service
>
>
> These 2 options don't allow to have more than one service implementation in
> the same time. Current Registry interface doesn't allow this, because it
> have only
> getService() that returns single implementation only.
>
> Is it possible to override Registry service?
>
> Thanks,
> Igor
>
> On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
> > Two options - have two service points (same service interface is
> > allowed,
> > just name the service point will be have to differ) or use the override
> > functionality (http://jakarta.apache.org/hivemind/current/override.html)
> >
> > Cheers,
> >
> > Johan
> >
> > On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com>
> > wrote:
> >
> > > Hi again,
> > > In our application we want to have multiple implementation classes
> > > for one service. So .xml file will look like <service-point
> > > id="Part" /> <implementation service-id="Part">
> > > <create-instance class="one.PartImpl"/>
> > > </implementation>
> > > <implementation service-id="Part">
> > > <create-instance class="two.PartImpl"/>
> > > </implementation>
> > >
> > > At startup user will choose implementation that he want to work with
> > > (and its id will be stored), and later user operations will be
> > > associated with selected implementation.
> > >
> > > As I see from RegistryBuilder code, it is not allowed to have 2
> > > implementation. Can you point me to other way having several service
> > > implementation? Or may be I can override some system service?
> > >
> > > Thank you,
> > > Igor Laberov
> > > Qlusters, Inc.
> > >
> > >
> > >
> > > --------------------------------------------------------------------
> > > -
> > > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> > >
> > >
> >
> >
> >
> > --
> > you too?
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> >
>
>
>
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RE: Multiple implementations for service
Posted by James Carman <ja...@carmanconsulting.com>.
So, you want to allow the users to choose which implementation type they
want, right? Then, define two different service points with the same
interface, but give them different ids (of course) corresponding to the
different implementations. Another approach would involve writing your own
service model which chooses which implementation type to instantiate using
some sort of thread-local parameter (which you'd have to set prior to
invoking of course).
-----Original Message-----
From: Igor Laberov [mailto:igorl@qlusters.com]
Sent: Thursday, April 28, 2005 10:11 AM
To: hivemind-user@jakarta.apache.org
Subject: Re: Multiple implementations for service
These 2 options don't allow to have more than one service implementation in
the same time. Current Registry interface doesn't allow this, because it
have only
getService() that returns single implementation only.
Is it possible to override Registry service?
Thanks,
Igor
On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
> Two options - have two service points (same service interface is
> allowed,
> just name the service point will be have to differ) or use the override
> functionality (http://jakarta.apache.org/hivemind/current/override.html)
>
> Cheers,
>
> Johan
>
> On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com>
> wrote:
>
> > Hi again,
> > In our application we want to have multiple implementation classes
> > for one service. So .xml file will look like <service-point
> > id="Part" /> <implementation service-id="Part">
> > <create-instance class="one.PartImpl"/>
> > </implementation>
> > <implementation service-id="Part">
> > <create-instance class="two.PartImpl"/>
> > </implementation>
> >
> > At startup user will choose implementation that he want to work with
> > (and its id will be stored), and later user operations will be
> > associated with selected implementation.
> >
> > As I see from RegistryBuilder code, it is not allowed to have 2
> > implementation. Can you point me to other way having several service
> > implementation? Or may be I can override some system service?
> >
> > Thank you,
> > Igor Laberov
> > Qlusters, Inc.
> >
> >
> >
> > --------------------------------------------------------------------
> > -
> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> >
> >
>
>
>
> --
> you too?
>
> ---------------------------------------------------------------------
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Re: Multiple implementations for service
Posted by Igor Laberov <ig...@qlusters.com>.
These 2 options don't allow to have more than one service implementation
in the same time.
Current Registry interface doesn't allow this, because it have only
getService() that returns single implementation only.
Is it possible to override Registry service?
Thanks,
Igor
On Wed, 2005-04-27 at 14:35, Johan Lindquist wrote:
> Two options - have two service points (same service interface is allowed,
> just name the service point will be have to differ) or use the override
> functionality (http://jakarta.apache.org/hivemind/current/override.html)
>
> Cheers,
>
> Johan
>
> On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com> wrote:
>
> > Hi again,
> > In our application we want to have multiple implementation classes for
> > one service. So .xml file will look like
> > <service-point id="Part" />
> > <implementation service-id="Part">
> > <create-instance class="one.PartImpl"/>
> > </implementation>
> > <implementation service-id="Part">
> > <create-instance class="two.PartImpl"/>
> > </implementation>
> >
> > At startup user will choose implementation that he want to work with
> > (and its id will be stored), and later user operations will be
> > associated with selected implementation.
> >
> > As I see from RegistryBuilder code, it is not allowed to have 2
> > implementation.
> > Can you point me to other way having several service implementation? Or
> > may be I can override some system service?
> >
> > Thank you,
> > Igor Laberov
> > Qlusters, Inc.
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> >
> >
>
>
>
> --
> you too?
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
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Re: Multiple implementations for service
Posted by Knut Wannheden <kn...@gmail.com>.
Igor,
If you're using HiveMind 1.1 there is yet another option. You can make
the <implementation> elements conditional using an "if" attribute. The
value of this attribute is a conditional expression which basically is
a boolean expression in which you reference class names and system
properties. Check here for more information and examples:
http://jakarta.apache.org/hivemind/current/conditional.html.
HTH,
--knut
On 4/27/05, Johan Lindquist <jo...@kawoo.co.uk> wrote:
> Two options - have two service points (same service interface is allowed,
> just name the service point will be have to differ) or use the override
> functionality (http://jakarta.apache.org/hivemind/current/override.html)
>
> Cheers,
>
> Johan
>
> On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com> wrote:
>
> > Hi again,
> > In our application we want to have multiple implementation classes for
> > one service. So .xml file will look like
> > <service-point id="Part" />
> > <implementation service-id="Part">
> > <create-instance class="one.PartImpl"/>
> > </implementation>
> > <implementation service-id="Part">
> > <create-instance class="two.PartImpl"/>
> > </implementation>
> >
> > At startup user will choose implementation that he want to work with
> > (and its id will be stored), and later user operations will be
> > associated with selected implementation.
> >
> > As I see from RegistryBuilder code, it is not allowed to have 2
> > implementation.
> > Can you point me to other way having several service implementation? Or
> > may be I can override some system service?
> >
> > Thank you,
> > Igor Laberov
> > Qlusters, Inc.
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> >
> >
>
> --
> you too?
>
> ---------------------------------------------------------------------
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Re: Multiple implementations for service
Posted by Johan Lindquist <jo...@kawoo.co.uk>.
Two options - have two service points (same service interface is allowed,
just name the service point will be have to differ) or use the override
functionality (http://jakarta.apache.org/hivemind/current/override.html)
Cheers,
Johan
On 27 Apr 2005 14:33:46 +0300, Igor Laberov <ig...@qlusters.com> wrote:
> Hi again,
> In our application we want to have multiple implementation classes for
> one service. So .xml file will look like
> <service-point id="Part" />
> <implementation service-id="Part">
> <create-instance class="one.PartImpl"/>
> </implementation>
> <implementation service-id="Part">
> <create-instance class="two.PartImpl"/>
> </implementation>
>
> At startup user will choose implementation that he want to work with
> (and its id will be stored), and later user operations will be
> associated with selected implementation.
>
> As I see from RegistryBuilder code, it is not allowed to have 2
> implementation.
> Can you point me to other way having several service implementation? Or
> may be I can override some system service?
>
> Thank you,
> Igor Laberov
> Qlusters, Inc.
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
>
>
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you too?
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