Yes I have. In fact I've watched the entire series and am following this very closely for a time now. The lecture clearly explains the mechanics and how this works and what we *can* do with it, but less about what we *should* (and shouldn’t) do with it.
I am a System Architect in a very large scale project. As such I have a lot of influence on the way and the speed our product assimilates new features. (For example, I made sure everybody is proficient in lambda/streams even before Java 8 was GA so the adoption was smooth and very fast). I am looking at the great features in Java 9 and I know that we are going to "jump" on the new module system with all the encapsulation it gives us. But I and my fellow Architects are very unsure what to think of the ServiceLoader. Some of the push-back I get is that it is a "low level component" meant for authors of infrastructure libraries. Others tell me to forget about using the ServiceLoader as a Service Locator and stick to good old Spring. Yet others tell me that the Java Expert group has actually taken a stand in the "Dependency Injection vs ServiceLocator" debate, by streamlining the ServiceLocator pattern instead of going with JDK level Dependency Injection. Discussions are heated, and I figured to go to the source instead of deducing our own conclusions with so little information. -----Original Message----- From: Alan Bateman [mailto:alan.bate...@oracle.com] Sent: יום ג 29 נובמבר 2016 15:24 To: Pisarev, Vitaliy <vitaliy.pisa...@hpe.com>; jigsaw-dev@openjdk.java.net Subject: Re: Services and Bindings - expected usage scenarios On 29/11/2016 13:13, Pisarev, Vitaliy wrote: > What about the intent behind how are developers supposed to use this tool? > > For example, when Optional was introduced in Java 8, it was specified > that it is intended to be used as a methods return type. And people should > not use it as class member or method argument, even though the compiler will > not prevent them to. > > Here is a language feature that comes with guidelines as to how it is > intended to be used. > > Can you tell me how the expert group envisions usage of the ServiceLoader in > Java 9, with reference to the original question (and any other thing you can > add with regard to this). > Have you looked at Alex's presentation on "Modules and Services" from JavaOne 2016 [1]? -Alan [1] http://openjdk.java.net/projects/jigsaw/talks/#j1-2016
