public ArtifactData getCandidateAsync(String arg) throws Exception { reporter.trace("coordinate %s", arg); if (isUrl(arg)) try { ArtifactData data = putAsync(new URI(arg)); data.local = true; return data; } catch (Exception e) { reporter.trace("hmm, not a valid url %s, will try the server", arg); } Coordinate c = new Coordinate(arg); if (c.isSha()) { ArtifactData r = get(c.getSha()); if (r != null) return r; } Revision revision = library.getRevisionByCoordinate(c); if (revision == null) return null; reporter.trace("revision %s", Hex.toHexString(revision._id)); ArtifactData ad = get(revision._id); if (ad != null) { reporter.trace("found in cache"); return ad; } URI url = revision.urls.iterator().next(); ArtifactData artifactData = putAsync(url); artifactData.coordinate = c; return artifactData; }