Thanks JWells's reply and now I can understand you said.
Thanks
--Tang
John Wells wrote:
> Comments in-line:
>
> On 4/25/2013 12:36 AM, Tang Yong wrote:
>> Thanks! I see.
>>
>> If john has other suggestions, please telling me.
>>
>> Thanks
>> Tang
>>
>> Sahoo wrote:
>>> That file does not contain @inject details. Only @service details.
>>> The format may have been documented in hk2 project website. John and
>>> co have taken a lot of care to document things. If you don't find any
>>> such document, then look at the maven plugin that generates this file.
>>> Since anyway you have to scan classes for @inject annotations, you
>>> might as well scan @service annotations. That way you don't have to
>>> deal with this file format.
>>> John may also point you in some good direction.
>>> Thank, Sahoo
> We explicitly do NOT document the format of this file because we would
> like to be able to change the format in the future if we come up with
> some reason for doing so. Sahoo is correct though, we do not in fact
> keep any @Inject information in the file. This file is read at startup
> and hence we are trying to keep it as small as possible.
>>>
>>> Sent from my Android phone, please excuse me for its brevity.
>>>
>>> -----Original Message----- From: Tang Yong [tangyong_at_cn.fujitsu.com]
>>> Received: Thursday, 25 Apr 2013, 9:11
>>> To: John Wells [john.wells_at_oracle.com]
>>> CC: Sahoo [sanjeeb.sahoo_at_oracle.com]; dev_at_glassfish.java.net
>>> [dev_at_glassfish.java.net]
>>> Subject: [Asking]About META-INF/hk2-locator/default
>>>
>>> Hi JWells,
>>> CC: Sahoo,
>>>
>>> I have two questions about META-INF/hk2-locator/default file,
>>> eg. for web-glue.jar,
>>>
>>> 1. in the default file, whether containing metadata generated by
>>> @Inject? That is to say, if some class in web-glue module defines the
>>> following,
>>>
>>> @Inject
>>> private JCDIService jcdiService;
>>>
>>> Then, whether generating @Inject related info(JCDIService,...) into
>>> META-INF/hk2-locator/default.
>>>
>>> As far as I know, I found META-INF/hk2-locator/default seems to only
>>> write @Service related info.
>>>
>>> 2. in web-glue.jar's META-INF/hk2-locator/default file, the following,
>>>
>>> ...
>>> [com.sun.enterprise.web.PEWebContainerFeatureFactoryImpl]S
>>> contract={com.sun.enterprise.web.pluggable.WebContainerFeatureFactory}
>>> name=pe
>>>
>>> [com.sun.enterprise.web.ServerConfigLookup]
>>> ...
>>>
>>> 1) whether "S" in
>>> [com.sun.enterprise.web.PEWebContainerFeatureFactoryImpl]S means the
>>> entry is @Service info?
> The "S" means that service is in the Singleton scope. This is a
> shorthand which made the file much smaller (we used to have to say
> "scope=javax.inject.Singleton".
>
> Another shortcut in the file is that the implementation by default is
> considered to be in the set of contracts unless "-" is after the ].
> This was also done to reduce the size of the file.
>>>
>>> 2) [com.sun.enterprise.web.ServerConfigLookup] entry has not "S", I want
>>> to know the meaning?
> If it does not have an "S" and does not have a scope= clause then it is
> in PerLookup scope.
>>>
>>> Finally, if META-INF/hk2-locator/default file does not generate @Inject
>>> info, I wish that @Inject info can be added into the file because on
>>> some scenes, I need to introspect glassfish modules(class file) to find
>>> @Inject info, if the @Inject info can be added into
>>> META-INF/hk2-locator/default file, that will avoid redundant things by
>>> pasing the file directly.
>>>
>>> Thanks
>>> --Tang
>>>
>>
>
>
>
--
－－－－－－－－－－－－－－－－－－－－－－
Tang Yong
Senior Engineer
Glassfish Team Developer(OSGi&OSGi-JavaEE)
OSGi Alliance Supporter
Blog: http://osgizone.typepad.com/tangyong/
Nanjing Fujitsu NanDa Software Tec CO.,LTD
http://www.fujitsu.com/cn/fnst
Tel: +86-25-86630566-8310
Fax: +86-25-83317685
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