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<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin: 10px 0 0 0">> Indeed in the original ServiceManager we purposely did not care about having several implementations of a given contract.</p>
<p style="margin: 10px 0 0 0">Is it a service manager in this case? (I understand there is probably no objective answer to that)</p>
</blockquote>
<p style="margin: 10px 0 0 0">It managed the services by allying the client to retrieve them, provide them and have services be started and stopped. That was good enough to me <img class="emoticon" src="https://hibernate.atlassian.net/images/icons/emoticons/smile.gif" height="20" width="20" align="absmiddle" alt="" border="0" /></p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin: 10px 0 0 0">> From what I understand the need to split contract and implementation is driven by the serialization implementation use case, correct?</p>
<p style="margin: 10px 0 0 0">Yes</p>
</blockquote>
<p style="margin: 10px 0 0 0">Since you only allow one implementation at the moment, the serialization service actually choses between the available implementation and provides a serializer? Or have you disabled the ability to chose a serializer?<br /> In other word does the service represent the (de)serializer or does it represent the serializer provider in which case the provider has its own way to select the right implementation?</p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin: 10px 0 0 0">> I wonder, do you have other use cases in mind? The backends?</p>
<p style="margin: 10px 0 0 0">Yes. I also think that class loading might become a service.</p>
</blockquote>
<p style="margin: 10px 0 0 0">I guess for this case, if the user customizes the CL service, it would provide it and if none is provided we start our own impl.</p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin: 10px 0 0 0">> You mentioned ServiceLoader which has IMO a less than elegant way of doing it</p>
<p style="margin: 10px 0 0 0">How come? It is the standard way of doing it. Also the ServiceProvider code was using it.</p>
</blockquote>
<p style="margin: 10px 0 0 0">Our use of ServiceLoader today only involves finding one implementation per service. If you look at how the JDK implements how to retrieve encoding, this is different and they use the mechanism I describe. Check <a href="http://docs.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">http://docs.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html</a> , they explain the encoding case.</p>
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