hudson.scm.AutoBrowserHolder Maven / Gradle / Ivy
package hudson.scm;
import hudson.model.AbstractProject;
import hudson.model.Hudson;
/**
* Maintains the automatically infered {@link RepositoryBrowser} instance.
*
*
* To reduce the user's work, Hudson tries to infer applicable {@link RepositoryBrowser}
* from configurations of other jobs. But this needs caution — for example,
* such infered {@link RepositoryBrowser} must be recalculated whenever
* a job configuration changes somewhere.
*
*
* This class makes such tracking easy by hiding this logic.
*/
final class AutoBrowserHolder {
private int cacheGeneration;
private RepositoryBrowser cache;
private SCM owner;
public AutoBrowserHolder(SCM owner) {
this.owner = owner;
}
public RepositoryBrowser get() {
int g = owner.getDescriptor().generation;
if(g!=cacheGeneration) {
cacheGeneration = g;
cache = infer();
}
return cache;
}
/**
* Picks up a {@link CVSRepositoryBrowser} that matches the
* given {@link CVSSCM} from existing other jobs.
*
* @return
* null if no applicable configuration was found.
*/
private RepositoryBrowser infer() {
for( AbstractProject p : Hudson.getInstance().getAllItems(AbstractProject.class) ) {
SCM scm = p.getScm();
if (scm.getClass()==owner.getClass()) {
if(scm.getBrowser()!=null && ((SCMDescriptor)scm.getDescriptor()).isBrowserReusable(scm,owner))
return scm.getBrowser();
}
}
return null;
}
}