@Override
public void onLoad(ItemGroup<? extends Item> parent, String name) throws IOException {
super.onLoad(parent, name);
TextFile f = getNextBuildNumberFile();
if (f.exists()) {
// starting 1.28, we store nextBuildNumber in a separate file.
// but old Hudson didn't do it, so if the file doesn't exist,
// assume that nextBuildNumber was read from config.xml
try {
synchronized (this) {
this.nextBuildNumber = Integer.parseInt(f.readTrim());
}
} catch (NumberFormatException e) {
// try to infer the value of the next build number from the existing build records. See
// JENKINS-11563
File[] folders =
this.getBuildDir()
.listFiles(
new FileFilter() {
public boolean accept(File file) {
return file.isDirectory() && file.getName().matches("[0-9]+");
}
});
if (folders == null || folders.length == 0) {
this.nextBuildNumber = 1;
} else {
Collection<Integer> foldersInt =
Collections2.transform(
Arrays.asList(folders),
new Function<File, Integer>() {
public Integer apply(File file) {
return Integer.parseInt(file.getName());
}
});
this.nextBuildNumber = Collections.max(foldersInt) + 1;
}
saveNextBuildNumber();
}
} else {
// From the old Hudson, or doCreateItem. Create this file now.
saveNextBuildNumber();
save(); // and delete it from the config.xml
}
if (properties == null) // didn't exist < 1.72
properties = new CopyOnWriteList<JobProperty<? super JobT>>();
for (JobProperty p : properties) p.setOwner(this);
}
/**
* Programatically updates the next build number.
*
* <p>Much of Hudson assumes that the build number is unique and monotonic, so this method can
* only accept a new value that's bigger than {@link #getLastBuild()} returns. Otherwise it'll be
* no-op.
*
* @since 1.199 (before that, this method was package private.)
*/
public synchronized void updateNextBuildNumber(int next) throws IOException {
RunT lb = getLastBuild();
if (lb != null ? next > lb.getNumber() : next > 0) {
this.nextBuildNumber = next;
saveNextBuildNumber();
}
}
/** Allocates a new buildCommand number. */
public synchronized int assignBuildNumber() throws IOException {
int r = nextBuildNumber++;
saveNextBuildNumber();
return r;
}
