[prev in list] [next in list] [prev in thread] [next in thread] 

List:       tapestry-user
Subject:    Re: problem injecting service
From:       Warner Onstine <sw-list () warneronstine ! com>
Date:       2006-10-30 3:55:18
Message-ID: F4BD558F-6CC5-44A7-A5BE-5A0C3C9B9003 () warneronstine ! com
[Download RAW message or body]

Definitely a step closer! Thanks so much Howard, now I just have to  
figure out how to use the getLink() method properly, digging through  
others' code now ;-).

-warner

On Oct 29, 2006, at 8:22 PM, Howard Lewis Ship wrote:

> Warner,
>
> I'm still unsure what's happening with your stack trace, but things  
> are
> beginning to come together.
>
> The core problem is that your engine service, ICalService, is not  
> invoking
> the LinkFactory service correctly:
>
>    public ILink getLink(boolean isPost, Object parameters) {
>        return linkFactory.constructLink((IEngineService)this, isPost,
> (Map)parameters, true);
>    }
>
> The parameters object passed in, as per:
> <a href="WeeksEvents.ics" jwcid="@ServiceLink" service="ognl:ical"
> parameters="ognl:calendarType"/>
>
> The service parameter of the ServiceLink component is supposed to  
> be the
> *name* of the service, not the an instance of the service.
>
> Tapestry is coercing the value from object to String.
>
> It is then searching for a service with that long object  
> description as its
> name, and failing.
>
> <a href="WeeksEvents.ics" jwcid="@ServiceLink" service="ical"
> parameters="ognl:calendarType"/>
>
> Should get the job done!
>
> I can see how easy it would be to stumble across this ... I almost  
> always
> create my own FooLink component to go along with my FooService.  The
> ServiceLink component was originally designed to be used for minor  
> services
> such as Home and Restart.
>
> On 10/27/06, Warner Onstine <sw-list@warneronstine.com> wrote:
>>
>> Hi all,
>> I'm having some difficulties injecting a service, when I reference
>> the service through a @ServiceLink I get this exception:
>> org.apache.hivemind.ApplicationRuntimeException
>> No engine service named '<SingletonProxy for
>> eventscalendar.ICalService 
>> (org.apache.tapestry.engine.IEngineService)>'
>> is available.
>> Stack Trace:
>>
>>      *
>> org.apache.tapestry.services.impl.ServiceMapImpl.buildProxy 
>> (ServiceMapIm
>> pl.java:143)
>>      *
>> org.apache.tapestry.services.impl.ServiceMapImpl.getService 
>> (ServiceMapIm
>> pl.java:105)
>>      * $ServiceMap_10e8b71c9d5.getService 
>> ($ServiceMap_10e8b71c9d5.java)
>>      *
>> org.apache.tapestry.engine.AbstractEngine.getService 
>> (AbstractEngine.java
>> :164)
>>      *
>> org.apache.tapestry.link.AbstractLinkComponent.getLink 
>> (AbstractLinkCompo
>> nent.java:197)
>>      * org.apache.tapestry.link.ServiceLink.getLink 
>> (ServiceLink.java:38)
>>      *
>> org.apache.tapestry.link.DefaultLinkRenderer.constructURL 
>> (DefaultLinkRen
>> derer.java:112)
>>      *
>> org.apache.tapestry.link.DefaultLinkRenderer.renderLink 
>> (DefaultLinkRende
>> rer.java:62)
>>
>>
>> Here is my setup:
>> hivemodule.xml
>> <module id="eventscalendar" version="4.0.0"
>> package="com.sourcebeat.tap101.services">
>>      <contribution configuration-
>> id="tapestry.services.ApplicationServices">
>>                 <service name="ical" object="service:ICalService" />
>>         </contribution>
>>
>>
>>         <service-point id="ICalService"
>>                  
>> interface="org.apache.tapestry.engine.IEngineService">
>>                 <invoke-factory model="singleton">
>>                         <construct class="ICalService">
>>                                 <set-object property="eventDAO"
>> value="spring:eventDAO"/>
>>                         </construct>
>>                 </invoke-factory>
>>         </service-point>
>> </module>
>>
>> UpcomingEvents.java (all but the injection ommitted)
>>      @InjectObject("service:eventscalendar.ICalService")
>>      public abstract IEngineService getIcal();
>>
>> UpcomingEvents.html (servicelink call)
>> <a href="WeeksEvents.ics" jwcid="@ServiceLink" service="ognl:ical"
>> parameters="ognl:calendarType"/>
>>
>> Now one thing I'm not sure on is my service implements the
>> IEngineService but it returns null on the getLink(), I don't know if
>> this is the root cause of the error or not. But I thought I'd shoot
>> this off before testing that theory out.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
>> For additional commands, e-mail: users-help@tapestry.apache.org
>>
>>
>
>
> -- 
> Howard M. Lewis Ship
> TWD Consulting, Inc.
> Independent J2EE / Open-Source Java Consultant
> Creator and PMC Chair, Apache Tapestry
> Creator, Apache HiveMind
>
> Professional Tapestry training, mentoring, support
> and project work.  http://howardlewisship.com


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
For additional commands, e-mail: users-help@tapestry.apache.org

[prev in list] [next in list] [prev in thread] [next in thread]