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<a class="user-hover" rel="ian@iay.org.uk" id="email_ian@iay.org.uk" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=ian%40iay.org.uk" style="color:#326ca6;">Ian Young</a>
commented on <img src="https://issues.shibboleth.net/jira/images/icons/issuetypes/improvement.png" height="16" width="16" border="0" align="absmiddle" alt="Improvement"> <a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/MDA-67'>MDA-67</a>
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<a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/MDA-67'><strong>allow the setting of Spring variables from the command line</strong></a>
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<div class="comment-block" style="background-color:#edf5ff;border:1px solid #dddddd;color:#000000;padding:12px;"><p>Or, still very hard.</p>
<p>Parsing the command line with JCommander does turn out to be very straightforward. However, there appears to be no way to influence the EvaluationContext used in the ApplicationContext.</p>
<p>I'm attaching some code that could be used to implement the parsing part of this, but it looks to me like actually implementing something useful will have to wait for a future version of Spring.</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java"> <span class="code-comment">// Dynamic parameters
</span>
/**
* Dynamic parameters to allow definition of Spring variables.
*/
@DynamicParameter(names = <span class="code-quote">"-D"</span>)
<span class="code-keyword">private</span> Map<<span class="code-object">String</span>, <span class="code-object">String</span>> variableDefinitions = <span class="code-keyword">new</span> HashMap<>();
/**
* Return the variable definition options.
*
* @<span class="code-keyword">return</span> {@link Map} from variable name to variable value.
*/
@Nonnull <span class="code-keyword">public</span> Map<<span class="code-object">String</span>, <span class="code-object">String</span>> getVariableDefinitions() {
<span class="code-keyword">return</span> variableDefinitions;
}
out.println(<span class="code-object">String</span>.format(<span class="code-quote">" --%-20s %s"</span>, <span class="code-quote">"Da=b"</span>, <span class="code-quote">"Define spring variable 'a' with value 'b'."</span>));
out.println();
<span class="code-keyword">for</span> (Entry<<span class="code-object">String</span>, <span class="code-object">String</span>> entry : cli.getVariableDefinitions().entrySet()) {
<span class="code-comment">// whatever
</span> }
<span class="code-keyword">package</span> net.shibboleth.metadata.cli;
<span class="code-keyword">import</span> java.util.Map;
<span class="code-keyword">import</span> org.testng.Assert;
<span class="code-keyword">import</span> org.testng.annotations.Test;
<span class="code-keyword">public</span> class SimpleCommandLineArgumentsTest {
@Test <span class="code-keyword">public</span> void getVariableDefinitions() <span class="code-keyword">throws</span> Exception {
<span class="code-keyword">final</span> SimpleCommandLineArguments cli = <span class="code-keyword">new</span> SimpleCommandLineArguments();
<span class="code-keyword">final</span> <span class="code-object">String</span>[] argv = {
<span class="code-quote">"file"</span>, <span class="code-quote">"-Daaa=bbb"</span>, <span class="code-quote">"pipe"</span>, <span class="code-quote">"-Dalfa=bravo"</span>,
};
cli.parseCommandLineArguments(argv);
<span class="code-keyword">final</span> Map<<span class="code-object">String</span>, <span class="code-object">String</span>> vars = cli.getVariableDefinitions();
Assert.assertEquals(cli.getInputFile(), <span class="code-quote">"file"</span>);
Assert.assertEquals(cli.getPipelineName(), <span class="code-quote">"pipe"</span>);
Assert.assertEquals(vars.size(), 2);
Assert.assertEquals(vars.get(<span class="code-quote">"aaa"</span>), <span class="code-quote">"bbb"</span>);
Assert.assertEquals(vars.get(<span class="code-quote">"alfa"</span>), <span class="code-quote">"bravo"</span>);
Assert.assertNull(vars.get(<span class="code-quote">"ccc"</span>));
}
}
</pre>
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