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Subject: Re: [sca-j] Should introduction of @Local annotation (JAVA-3) affect theSemantics of an Unannotated Implementation



Vamsi,
Good catch!  Yes, we should make this change.  

    Simon

Simon C. Nash, IBM Distinguished Engineer
Member of the IBM Academy of Technology
Tel. +44-1962-815156  Fax +44-1962-818999



C Vamsi <vamsic007@in.ibm.com>

28/08/2008 11:14

To
Mike Edwards/UK/IBM@IBMGB
cc
"OASIS Java" <sca-j@lists.oasis-open.org>
Subject
Re: [sca-j] Should introduction of @Local annotation (JAVA-3) affect the Semantics of an Unannotated Implementation





We may also want to consider that when there is no @Service annotaion on
the implementation class, the interfaces implemented by the class that are
annotated with @Remotable (or @Local) will result in a Service.

Currently lines 375-376 in CI spec say:
  "Public setter methods that are not included in any interface specified
     by an @Service annotation."

We may have to change this to:

  "Public setter methods that are not included in the interface of any of
     the Services provided by the Java component."



This change is required irrespective of @Local annotation.



++Vamsi



                                                                         
            Mike Edwards                                                  
            <mike_edwards@uk.                                            
            ibm.com>                                                   To
                                      "OASIS Java"                        
            28/08/2008 15:10          <sca-j@lists.oasis-open.org>        
                                                                       cc
                                                                         
                                                                  Subject
                                      Re: [sca-j] Should introduction of  
                                      @Local annotation (JAVA-3) affect  
                                      the Semantics of an Unannotated    
                                      Implementation                      
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         




Simon,

The algorithm for calculating the componentType of an unannotated
implementation already makes a
distinction dependent on the marking of an interface used by the
implementation, so the different rules
already exist:

Lines 384/385 from the C&I spec:


If its type is complex, then if the type is an interface marked by
@Remotable, then it is a reference; otherwise, it is a property.

The introduction of an @Local annotation would affect this part of the spec
at least.  I would expect that an annotated interface would
be regarded as marking a reference, even if it is marked @Local.

By extension, it is worth asking whether *any* SCA annotation in the
interface implies treating its use as indicating a reference.


Yours,  Mike.

Strategist - Emerging Technologies, SCA & SDO.
Co Chair OASIS SCA Assembly TC.
IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
Phone & FAX: +44-1962-818014    Mobile: +44-7802-467431
Email:  mike_edwards@uk.ibm.com


                                                                         
From:  Simon Nash/UK/IBM@IBMGB                                            
                                                                         
To:    "OASIS Java" <sca-j@lists.oasis-open.org>                          
                                                                         
Date:  27/08/2008 18:13                                                  
                                                                         
Subjec Re: [sca-j] Should introduction of @Local annotation (JAVA-3)      
t:     affect the Semantics of an Unannotated Implementation              
                                                                         







I take a slightly different view on this.  I think an unannotated
implementation is exactly that.  I don't think it means that all the
interfaces referenced by the implementation must also be
unannotated.  However, I'm open to discussion on the best way to handle
this.  Perhaps we need different rules for:
1. Unannotated implementation / unannotated interfaces
2. Unannotated implementation / annotated interfaces
3. Annotated implementation

   Simon

Simon C. Nash, IBM Distinguished Engineer
Member of the IBM Academy of Technology
Tel. +44-1962-815156  Fax +44-1962-818999


                                                                         
Mike                                                                      
Edwards/UK/IBM@IB                                                        
MGB                                                                    To
                         "OASIS Java" <sca-j@lists.oasis-open.org>        
27/08/2008 10:42                                                       cc
                                                                         
                                                                  Subject
                         Re: [sca-j] Should introduction of @Local        
                         annotation (JAVA-3) affect the Semantics of an  
                         Unannotated Implementation                      
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         





Folks,

An @Local annotation would certainly affect the semantics of an unannotated
implementation.

An interface so marked would clearly indicate something relating to an SCA
reference.


Yours,  Mike.

Strategist - Emerging Technologies, SCA & SDO.
Co Chair OASIS SCA Assembly TC.
IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
Phone & FAX: +44-1962-818014    Mobile: +44-7802-467431
Email:  mike_edwards@uk.ibm.com

                                                                         
From: C Vamsi <vamsic007@in.ibm.com>                                      
                                                                         
                                                                         
To:   Simon Nash/UK/IBM@IBMGB                                            
                                                                         
Cc:   sca-j@lists.oasis-open.org                                          
                                                                         
Date: 27/08/2008 09:09                                                    
                                                                         
                                                                         
Subje [sca-j] Should introduction of @Local annotation (JAVA-3) affect    
ct:   the Semantics of an Unannotated Implementation                      
                                                                         








Simon,

Should the introduction of @Local annotation affect the "Semantics of an
Unannotated Implementation" (section 8 in sca-javaci-draft-20070926.doc)
where we are currently using only interfaces marked with @Remotable in
computing the references/properties of an implementation?

++Vamsi



          Simon Nash
          <NASH@uk.ibm.com>
                                                                     To
          27/08/2008 12:57          sca-j@lists.oasis-open.org
                                                                     cc

                                                                Subject
                                    Re: [sca-j] Introspecting services
                                    offered by a Java implementation
                                    class without @Service










Raymond,
Minor nit: the @OneWay annotation applies to a method, not to an
interface.  Your example should be updated to show this.

In your example, these services are local.  Issue JAVA-3 has proposed a new
annotation @Local that could be used on Interface1and Interface2 to allow
them to be recognized by the introspection algorithm.

I believe this discussion can be handled under JAVA-3 and there is no need
to create a new issue.

  Simon

Simon C. Nash, IBM Distinguished Engineer
Member of the IBM Academy of Technology
Tel. +44-1962-815156  Fax +44-1962-818999



Raymond Feng
<rfeng@us.ibm.com>
                                                                     To
25/08/2008 17:25                            sca-j@lists.oasis-open.org
                                                                     cc

                                                                Subject
                                          [sca-j] Introspecting
                                          services offered by a Java
                                          implementation class without
                                          @Service












Hi,

In Java Component Implementation Specification 1.00, we have the following
statements:

143 1.2.1.3. Introspecting services offered by a Java implementation
144 In the cases described below, the services offered by a Java
implementation class may be determined
145 through introspection, eliding the need to specify them using @Service.
The following algorithm is used to
146 determine how services are introspected from an implementation class:
147 If the interfaces of the SCA services are not specified with the
@Service annotation on the implementation
148 class, it is assumed that all implemented interfaces that have been
annotated as @Remotable are the
149 service interfaces provided by the component. If none of the
implemented interfaces is remotable, then by
150 default the implementation offers a single service whose type is the
implementation class.

What if an interface is annotated with SCA annotations such as @OneWay or
@Callback?

For example:

public class MyServiceImpl implements Interface1, Interface2 {
}

@Callback(CallbackInterface.class)
public interface Interface1 {
}

@OneWay
public interface Interface2 {
}

By the spec, there is only one service named MyServiceImpl. But isn't it
more natural that we should find two SCA services: Interface1 and
Interface2? Please clarify.

Thanks,
Raymond


Raymond Feng
Senior Software Engineer, Open Source SCA Development, Apache Tuscany
Project
IBM Bay Area Lab, 1001 E Hillsdale Blvd, Suite 400, Foster City, CA 94404,
USA
E-mail: rfeng@us.ibm.com, Notes: Raymond Feng/Burlingame/IBM, Tel:
650-645-8117, T/L: 367-8117
Web & Blog: www.enjoyjava.com- The Cyber Cafeteria to Enjoy Java












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