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Solder also has a @Requires annotation which you might find useful -
it allows you to specify a class name, and if that class is found on
the classpath then that bean will be installed.<br>
<br>
On 03/03/11 22:00, José Rodolfo Carrijo de Freitas wrote:
<blockquote
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<p class="MsoNormal"><span style="font-size: 12pt; font-family:
"Times New Roman","serif"; color:
black;">Morning guys,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family:
"Times New Roman","serif"; color:
black;"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family:
"Times New Roman","serif"; color:
black;" lang="EN-US">I’m working at the issue <a
moz-do-not-send="true"
href="https://issues.jboss.org/browse/SEAMINTL-27">https://issues.jboss.org/browse/SEAMINTL-27</a>
and the problem here is caused by an optional dependency.<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt;
font-family: "Courier New"; color: blue;
background: none repeat scroll 0% 0% white;" lang="EN-US"><</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: rgb(163, 21, 21); background: none repeat
scroll 0% 0% white;" lang="EN-US">dependency</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: blue; background: none repeat scroll 0% 0%
white;" lang="EN-US">></span><span style="font-size:
10pt; font-family: "Courier New";" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left: 35.4pt; text-indent:
0.6pt;"><span style="font-size: 10pt; font-family:
"Courier New"; color: blue; background: none
repeat scroll 0% 0% white;" lang="EN-US"><</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: rgb(163, 21, 21); background: none repeat
scroll 0% 0% white;" lang="EN-US">groupId</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: blue; background: none repeat scroll 0% 0%
white;" lang="EN-US">></span><span style="font-size:
10pt; font-family: "Courier New"; color: black;
background: none repeat scroll 0% 0% white;" lang="EN-US">joda-time</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: blue; background: none repeat scroll 0% 0%
white;" lang="EN-US"></</span><span style="font-size:
10pt; font-family: "Courier New"; color: rgb(163,
21, 21); background: none repeat scroll 0% 0% white;"
lang="EN-US">groupId</span><span style="font-size: 10pt;
font-family: "Courier New"; color: blue;
background: none repeat scroll 0% 0% white;" lang="EN-US">><br>
<</span><span style="font-size: 10pt; font-family:
"Courier New"; color: rgb(163, 21, 21);
background: none repeat scroll 0% 0% white;" lang="EN-US">artifactId</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: blue; background: none repeat scroll 0% 0%
white;" lang="EN-US">></span><span style="font-size:
10pt; font-family: "Courier New"; color: black;
background: none repeat scroll 0% 0% white;" lang="EN-US">joda-time</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: blue; background: none repeat scroll 0% 0%
white;" lang="EN-US"></</span><span style="font-size:
10pt; font-family: "Courier New"; color: rgb(163,
21, 21); background: none repeat scroll 0% 0% white;"
lang="EN-US">artifactId</span><span style="font-size: 10pt;
font-family: "Courier New"; color: blue;
background: none repeat scroll 0% 0% white;" lang="EN-US">></span><span
style="font-size: 10pt; font-family: "Courier
New";" lang="EN-US"><br>
<span style="color: blue; background: none repeat scroll 0%
0% white;"><</span><span style="color: rgb(163, 21,
21); background: none repeat scroll 0% 0% white;">optional</span><span
style="color: blue; background: none repeat scroll 0% 0%
white;">></span><span style="color: black; background:
none repeat scroll 0% 0% white;">true</span><span
style="color: blue; background: none repeat scroll 0% 0%
white;"></</span><span style="color: rgb(163, 21, 21);
background: none repeat scroll 0% 0% white;">optional</span><span
style="color: blue; background: none repeat scroll 0% 0%
white;">></span><o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt;
font-family: "Courier New"; color: blue;
background: none repeat scroll 0% 0% white;" lang="EN-US"></</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: rgb(163, 21, 21); background: none repeat
scroll 0% 0% white;" lang="EN-US">dependency</span><span
style="font-size: 10pt; font-family: "Courier
New"; color: blue; background: none repeat scroll 0% 0%
white;" lang="EN-US">><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: black;"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family:
"Times New Roman","serif"; color:
black;" lang="EN-US">So, I was talking with ken, and
there´re two suggested approaches:<o:p></o:p></span></p>
<ol start="1" type="1">
<li class="MsoNormal" style=""><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";" lang="EN-US">Mark the
implementation classes that use joda-time with @Veto and
require the developer to override that setting through XML
Config if they want to use them<o:p></o:p></span></li>
<li class="MsoNormal" style=""><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";" lang="EN-US">Mark the set
of JDK dateTime and joda-time classes as two Alternative
options and require the developer to specify which one to
use.<o:p></o:p></span></li>
</ol>
<p class="MsoNormal" style=""><span style="font-size: 12pt;
font-family: "Times New Roman","serif";"
lang="EN-US">What option
do you think is the better approach? Do you have any other
idea?<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 12pt;
font-family: "Times New Roman","serif";"
lang="EN-US">Either
way we require the developer to say what he wants to use,
This could be useful
in some situations, but I guess that most of times, people
just want to use the
feature regarding what seam uses in its back.<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 12pt;
font-family: "Times New Roman","serif";"
lang="EN-US">What do
you think?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: black;"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: black;"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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