void MergeDispatcher::start_play(
SeekRange const & range,
response_t const & seek_resp)
{
LOG_DEBUG("[start_play]");
dispatch_io_svc().post(MergeTask(task_info(), sink_group(), range, seek_resp,
boost::bind(&MergeDispatcher::handle_play, this, _1), merger_));
}
MergeResult ThreeWayMerge::mergeKeySet (const KeySet & base, const KeySet & ours, const KeySet & theirs, const Key & mergeRoot)
{
Key ourkey = ours.head ().dup ();
Key theirkey = theirs.head ().dup ();
Key basekey = base.head ().dup ();
MergeResult merged = mergeKeySet (
MergeTask (BaseMergeKeys (base, basekey), OurMergeKeys (ours, ourkey), TheirMergeKeys (theirs, theirkey), mergeRoot));
return merged;
}
int MergingKDB::synchronize (KeySet & returned, Key & parentKey, ThreeWayMerge & merger)
{
try
{
// write our config
int ret = KDB::set (returned, parentKey);
// update our config (if no conflict)
KDB::get (returned, parentKey);
return ret;
}
catch (KDBException const &)
{
// a conflict occurred, see if we can solve it with the merger
// refresh the key database
KeySet theirs = returned.dup ();
KDB::get (theirs, parentKey);
// try to merge
MergeResult result = merger.mergeKeySet (MergeTask (BaseMergeKeys (base, parentKey), OurMergeKeys (returned, parentKey),
TheirMergeKeys (theirs, parentKey), parentKey));
if (!result.hasConflicts ())
{
// hurray, we solved the issue
KeySet resultKeys = result.getMergedKeys ();
int ret = KDB::set (resultKeys, parentKey);
base = resultKeys;
return ret;
}
else
{
// nothing we can do anymore
KeySet conflictSet = result.getConflictSet ();
throw MergingKDBException (parentKey, conflictSet);
}
}
}
MergeTask reverse () const
{
return MergeTask (BaseMergeKeys (base, baseParent), OurMergeKeys (theirs, theirParent), TheirMergeKeys (ours, ourParent),
mergeRoot);
}
void MergeDispatcher::start_buffer()
{
LOG_DEBUG("[start_buffer]");
dispatch_io_svc().post(MergeTask(task_info(),
boost::bind(&MergeDispatcher::handle_buffer, this, _1), merger_));
}
void schedule_merge (Ob dep) { schedule(MergeTask(dep)); }
