delete the whole directory if we can

Author: tburch

src/main/java/com/lowtuna/jsonblob/core/BlobCleanupJob.java

@@ -36,6 +36,7 @@ public void run() {
       for(String dataDirPath: dataDirs) {
         File dir = new File(dataDirPath);
         if (dir.listFiles().length == 0) {
+          log.debug("Deleting {} because there are no files in it", dir);
           dir.delete();
         }
 

src/main/java/com/lowtuna/jsonblob/core/DataDirectoryCleanupJob.java

@@ -70,6 +70,12 @@ public DateTime apply(@Nullable String input) {
           return;
         }
 
+        if (toRemove.size() == blobs.size()) {
+          log.info("All {} files in {} should be deleted, so we'll delete the directory", toRemove.size(), dir);
+          dir.delete();
+          log.info("{} was deleted", dir);
+        }
+
         log.debug("Submitting BulkBlobDeleteJobs for {} blobs in {}", toRemove.size(), dir);
         List<List<String>> subSets = Lists.partition(Lists.newArrayList(toRemove.keySet()), 100);
         subSets.parallelStream().forEach(list -> executorService.submit(new BulkBlobDeleteJob(Sets.newHashSet(list), fileSystemJsonBlobManager, deleteEnabled)));