if (mFirstPassLatch == null) {
// First time through we kick off all the recent tasks, and wait
// around to see if everyone finishes quickly.
final Collection<RootInfo> roots = mRoots.getMatchingRootsBlocking(mState);
for (RootInfo root : roots) {
if ((root.flags & Root.FLAG_SUPPORTS_RECENTS) != 0) {
final RecentTask task = new RecentTask(root.authority, root.rootId);
mTasks.put(root, task);
}
}
mFirstPassLatch = new CountDownLatch(mTasks.size());
for (RecentTask task : mTasks.values()) {
ProviderExecutor.forAuthority(task.authority).execute(task);
}
try {
mFirstPassLatch.await(MAX_FIRST_PASS_WAIT_MILLIS, TimeUnit.MILLISECONDS);
mFirstPassDone = true;
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
final long rejectBefore = System.currentTimeMillis() - REJECT_OLDER_THAN;
// Collect all finished tasks
boolean allDone = true;
List<Cursor> cursors = Lists.newArrayList();
for (RecentTask task : mTasks.values()) {
if (task.isDone()) {
try {
final Cursor cursor = task.get();
if (cursor == null) continue;
final FilteringCursorWrapper filtered = new FilteringCursorWrapper(
cursor, mState.acceptMimes, RECENT_REJECT_MIMES, rejectBefore) {
@Override
public void close() {
// Ignored, since we manage cursor lifecycle internally
}
};
cursors.add(filtered);
} catch (InterruptedException e) {
throw new RuntimeException(e);
} catch (ExecutionException e) {
// We already logged on other side
}
} else {
allDone = false;
}
}
if (LOGD) {
Log.d(TAG, "Found " + cursors.size() + " of " + mTasks.size() + " recent queries done");
}
final DirectoryResult result = new DirectoryResult();
result.sortOrder = SORT_ORDER_LAST_MODIFIED;
// Hint to UI if we're still loading
final Bundle extras = new Bundle();
if (!allDone) {
extras.putBoolean(DocumentsContract.EXTRA_LOADING, true);
}
final Cursor merged;
if (cursors.size() > 0) {
merged = new MergeCursor(cursors.toArray(new Cursor[cursors.size()]));
} else {
// Return something when nobody is ready
merged = new MatrixCursor(new String[0]);
}
final SortingCursorWrapper sorted = new SortingCursorWrapper(merged, result.sortOrder) {
@Override
public Bundle getExtras() {
return extras;
}
};
result.cursor = sorted;
return result;
