@Override
public DiscoveryResult<MavenHostedRepository> discoverLocalContent(
final MavenHostedRepository mavenRepository) throws IOException {
final DiscoveryResult<MavenHostedRepository> discoveryResult =
new DiscoveryResult<MavenHostedRepository>(mavenRepository);
final WalkerContext context =
new DefaultWalkerContext(
mavenRepository, new ResourceStoreRequest("/"), new DefaultStoreWalkerFilter(), true);
final PrefixCollectorProcessor prefixCollectorProcessor = new PrefixCollectorProcessor();
context.getProcessors().add(prefixCollectorProcessor);
try {
walker.walk(context);
final ParentOMatic parentOMatic = prefixCollectorProcessor.getParentOMatic();
if (parentOMatic.getRoot().isLeaf()) {
// tree is basically empty, so make the list too
discoveryResult.recordSuccess(
ID,
"Repository crawled successfully (is empty)",
new ArrayListPrefixSource(Collections.<String>emptyList()));
} else {
discoveryResult.recordSuccess(
ID,
"Repository crawled successfully",
new ArrayListPrefixSource(getAllLeafPaths(parentOMatic, config.getLocalScrapeDepth())));
}
} catch (WalkerException e) {
if (e.getWalkerContext().getStopCause() != null) {
discoveryResult.recordError(ID, e.getWalkerContext().getStopCause());
} else {
discoveryResult.recordError(ID, e);
}
}
return discoveryResult;
}
@Override
protected List<String> diveIn(final ScrapeContext context, final Page page) throws IOException {
// we use the great and all-mighty ParentOMatic
final ParentOMatic parentOMatic = new ParentOMatic();
diveIn(context, page, 0, parentOMatic, parentOMatic.getRoot());
// Special case: scraped with 0 entry, we consider this as an error
// Remote repo empty? Why are you proxying it? Or worse, some scrape
// exotic index page and we end up with 0 entries by mistake?
if (parentOMatic.getRoot().isLeaf()) {
context.stop(
"Remote recognized as "
+ getTargetedServer()
+ ", but scraped 0 entries. This is considered a failure.");
return null;
}
final List<String> entries = parentOMatic.getAllLeafPaths();
return entries;
}