Can you explain the benefit of moving SCA/SDO over to the Android platform?
I can understand wanting to have the ability to consume simple XML services
and perhaps consume disconnected datagraphs, but I don't understand why the
world wouldn't want a more light-weight way of doing that than ripping out
something that was meant for the JEE / JSE.
On Sat, Mar 15, 2008 at 9:44 AM, Luciano Resende <[EMAIL PROTECTED]>
wrote:
> So, when I said branch, I probably should have said a sandbox. I think
> we could start with a host-android module where I'd like to experiment
> with changing the way we dynamically find extensions and see how
> further we can go on executing calculator in the Android environment.
>
> Thoughts ?
>
> On Sat, Mar 15, 2008 at 2:30 AM, Adriano Crestani
> <[EMAIL PROTECTED]> wrote:
> > Good idea Luciano : )
> >
> > What we should copy to this branch? SCA modules and calculator sample?
> I
> > think it's enough to start experiment SCA on Android
> >
> > I sent a msg to Android Developers list, lets wait for the response : )
> >
> > Regards,
> > Adriano Crestani
> >
> > On Fri, Mar 14, 2008 at 7:11 PM, Luciano Resende <[EMAIL PROTECTED]>
> > wrote:
> >
> >
> >
> > > Good summary Adriano, I haven't had success yet trying to run
> > > Calculator sample application on the Android environment. Below are
> > > some issues I noted
> > >
> > > - Looks like our calculator sample dependency has grown out of
> > > control, and is now requiring node, databinding, axiom, etc
> > > - The service locator pattern we use for our extension mechanism is
> > > not working correct in Android environment causing various NPE
> > > - etc
> > >
> > > What do you think if create a branch to experiment and try to work on
> > > these issues together ?
> > >
> > >
> > > On Fri, Mar 14, 2008 at 2:13 PM, Adriano Crestani
> > > <[EMAIL PROTECTED]> wrote:
> > > > Hi,
> > > >
> > > > Luciano and me have been trying to run the SCA calculator sample
> on the
> > > > Google Android platform, that is a platform for mobile devices. As
> the
> > > > Android platform apps are written in Java language, we tried to
> run the
> > > Java
> > > > SCA calculator sample on it.
> > > >
> > > > Although the apps for Android are coded in Java, it's only coded
> in
> > > Java
> > > > language. When it's compiled, it generates not .class files, but a
> file
> > > > called .dex, that is equivalent to .jar files. The .dex files are
> not
> > > > compound of Java standard bytecode, but a special bytecode that is
> > > intended
> > > > to run only on Android VM: Dalvik.
> > > >
> > > > So, in our first try to compile the calculator sample, only
> importing
> > > the
> > > > needed SCA jars were not successful, because the SCA jars are
> compiled
> > > using
> > > > JDK compiler and do not have the Android special bytecode format.
> > > >
> > > > Fortunately, when you import the SCA jars into an eclipse Android
> > > project,
> > > > it automatically tries to convert the JDK bytecode to Android
> bytecode
> > > > before execute it. But something was not going correctly yet,
> cause
> > > when it
> > > > tries to execute the service I get this exception:
> > > >
> > > > Application Error: com.android.hello An error in com.android.hello
> .
> > > Unnable
> > > > to start activity
> > > > ComponentInfo{com.android.hello/com.android.hello.HelloAndroid]:
> > > > org.osoa.sca.ServiceRuntimeException:
> java.lang.NullPointerException.
> > > >
> > > > I wasn't sure about what was happening, and then I tried another
> > > approach:
> > > > not import the SCA jars, but place the SCA source code needed by
> the
> > > > calculator sample into the Android app src folder. This way the
> SCA
> > > would be
> > > > compiled directly to Android bytecode.
> > > >
> > > > Unfortunately, the Android is not Java and does not have the
> entire set
> > > of
> > > > classes that J2SE provides. It provides only some java classes as
> > > java.langand
> > > > java.util classes which Android developers kept with the same
> > > package/class
> > > > names and method signature for easy portability of Java app codes.
> So,
> > > the
> > > > common Java classes used on Java SCA were compatible. But, the
> Java SCA
> > > uses
> > > > a lot the javax.xml package and Android implements only part of
> this
> > > package
> > > > on its platform, so I was getting a lot of errors because the
> missing
> > > > classes that should be contained in this package. I solved it
> > > downloading
> > > > the StAX source code and JDK javax.xml API source code, and
> placing it
> > > > directly on my Android app project. Finally I got it compiled.
> > > >
> > > > Then, I got another error. I found out that the Android compiler
> fist
> > > > compile the Java code to .class files and then compile the .class
> files
> > > to a
> > > > .dex file. The first process everything goes fine, meaning the
> package
> > > > dependencies and code syntax are OK. But on the second process,
> when it
> > > > tries convert the .class files to .dex, I get 4 warnings and 1
> error
> > > that
> > > > are lightly described:
> > > >
> > > > *[2008-03-14 14:25:27 - HelloAndroid]
> > > > trouble processing:
> > > > [2008-03-14 14:25:27 - HelloAndroid] truncated annotation
> attribute
> > > > ...while parsing RuntimeVisibleAnnotations attribute at offset
> 00000175
> > > > ...while parsing attributes[1]
> > > > ...while parsing javax/xml/bind/annotation/XmlNs.class
> > > > ...while processing javax/xml/bind/annotation/XmlNs.class
> > > > [2008-03-14 14:25:27 - HelloAndroid]
> > > > trouble processing:
> > > > [2008-03-14 14:25:27 - HelloAndroid] truncated annotation
> attribute
> > > > ...while parsing AnnotationDefault attribute at offset 000002b8
> > > > ...while parsing attributes[0]
> > > > ...while parsing methods[0]
> > > > ...while parsing javax/xml/bind/annotation/XmlSchema.class
> > > > ...while processing javax/xml/bind/annotation/XmlSchema.class
> > > > [2008-03-14 14:25:28 - HelloAndroid]
> > > > trouble processing:
> > > > [2008-03-14 14:25:28 - HelloAndroid] truncated annotation
> attribute
> > > > ...while parsing AnnotationDefault attribute at offset 00000204
> > > > ...while parsing attributes[0]
> > > > ...while parsing methods[2]
> > > > ...while parsing javax/xml/ws/Action.class
> > > > ...while processing javax/xml/ws/Action.class
> > > > [2008-03-14 14:25:29 - HelloAndroid]
> > > > trouble processing:
> > > > [2008-03-14 14:25:29 - HelloAndroid] truncated annotation
> attribute
> > > > ...while parsing AnnotationDefault attribute at offset 0000020b
> > > > ...while parsing attributes[1]
> > > > ...while parsing methods[0]
> > > > ...while parsing org/osoa/sca/annotations/Service.class
> > > > ...while processing org/osoa/sca/annotations/Service.class
> > > > [2008-03-14 14:25:30 - HelloAndroid] 4 warnings
> > > > [2008-03-14 14:25:30 - HelloAndroid]
> > > > trouble writing output: not found
> > > > [2008-03-14 14:25:30 - HelloAndroid] Conversion to Dalvik format
> failed
> > > with
> > > > error 2
> > > >
> > > > *
> > > > So, I got nothing running so far : ( . Is there anyone with some
> > > Android
> > > > knowledge that could help us with it?
> > > >
> > > > I will probably send this doubts to Android community and see if
> they
> > > can
> > > > help us : )
> > > >
> > > > Thanks in advance ; )
> > > >
> > > > Adriano Crestani
> > > >
> > >
> > >
> > >
> > > --
> > > Luciano Resende
> > > Apache Tuscany Committer
> > > http://people.apache.org/~lresende<http://people.apache.org/%7Elresende><
> http://people.apache.org/%7Elresende>
> > > http://lresende.blogspot.com/
> > >
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> > >
> > >
> >
>
>
>
> --
> Luciano Resende
> Apache Tuscany Committer
> http://people.apache.org/~lresende <http://people.apache.org/%7Elresende>
> http://lresende.blogspot.com/
>
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