private void SaveLastSequence(SaveLastSequenceCompletionBlock completionHandler)
{
if (!lastSequenceChanged) {
if (completionHandler != null) {
completionHandler();
}
return;
}
if (_savingCheckpoint) {
// If a save is already in progress, don't do anything. (The completion block will trigger
// another save after the first one finishes.)
Task.Delay(500).ContinueWith(t => SaveLastSequence(completionHandler));
}
lastSequenceChanged = false;
Log.D(TAG, "saveLastSequence() called. lastSequence: " + LastSequence);
var body = new Dictionary<String, Object>();
if (_remoteCheckpoint != null) {
body.PutAll(_remoteCheckpoint);
}
body["lastSequence"] = LastSequence;
var remoteCheckpointDocID = RemoteCheckpointDocID();
if (String.IsNullOrEmpty(remoteCheckpointDocID)) {
Log.W(TAG, "remoteCheckpointDocID is null, aborting saveLastSequence()");
return;
}
_savingCheckpoint = true;
var message = SendAsyncRequest(HttpMethod.Put, "/_local/" + remoteCheckpointDocID, body, (result, e) =>
{
_savingCheckpoint = false;
if (e != null) {
Log.V(TAG, "Unable to save remote checkpoint", e);
}
if (e != null) {
switch (GetStatusFromError(e)) {
case StatusCode.NotFound:
_remoteCheckpoint = null;
break;
case StatusCode.Conflict:
RefreshRemoteCheckpointDoc();
break;
default:
// TODO: On 401 or 403, and this is a pull, remember that remote
// TODO: is read-only & don't attempt to read its checkpoint next time.
break;
}
} else {
Log.D(TAG, "Save checkpoint response: " + result);
var response = result.AsDictionary<string, object>();
body.Put ("_rev", response.Get ("rev"));
_remoteCheckpoint = body;
var localDb = LocalDatabase;
if(localDb == null || localDb.Storage == null) {
Log.W(TAG, "Database is null, ignoring remote checkpoint response");
if(completionHandler != null) {
completionHandler();
}
return;
}
localDb.SetLastSequence(LastSequence, remoteCheckpointDocID);
}
if (completionHandler != null) {
completionHandler ();
}
});
// This request should not be canceled when the replication is told to stop:
Task dummy;
_requests.TryRemove(message, out dummy);
}
private void SaveLastSequence(SaveLastSequenceCompletionBlock completionHandler)
{
if (!lastSequenceChanged) {
if (completionHandler != null) {
completionHandler();
}
return;
}
if (_savingCheckpoint) {
// If a save is already in progress, don't do anything. (The completion block will trigger
// another save after the first one finishes.)
_overdueForSave = true;
return;
}
lastSequenceChanged = false;
_overdueForSave = false;
Log.D(TAG, "saveLastSequence() called. lastSequence: " + LastSequence);
var body = new Dictionary<String, Object>();
if (_remoteCheckpoint != null) {
body.PutAll(_remoteCheckpoint);
}
body["lastSequence"] = LastSequence;
var remoteCheckpointDocID = RemoteCheckpointDocID();
if (String.IsNullOrEmpty(remoteCheckpointDocID)) {
Log.W(TAG, "remoteCheckpointDocID is null, aborting saveLastSequence()");
return;
}
_savingCheckpoint = true;
SendAsyncRequest(HttpMethod.Put, "/_local/" + remoteCheckpointDocID, body, (result, e) =>
{
_savingCheckpoint = false;
if (e != null) {
Log.V (TAG, "Unable to save remote checkpoint", e);
}
if (LocalDatabase == null) {
Log.W(TAG, "Database is null, ignoring remote checkpoint response");
if (completionHandler != null) {
completionHandler ();
}
return;
}
if (!LocalDatabase.Open()) {
Log.W(TAG, "Database is closed, ignoring remote checkpoint response");
if (completionHandler != null)
{
completionHandler ();
}
return;
}
if (e != null) {
switch (GetStatusFromError(e)) {
case StatusCode.NotFound:
_remoteCheckpoint = null;
_overdueForSave = true;
break;
case StatusCode.Conflict:
RefreshRemoteCheckpointDoc();
break;
default:
// TODO: On 401 or 403, and this is a pull, remember that remote
// TODO: is read-only & don't attempt to read its checkpoint next time.
break;
}
} else {
Log.D(TAG, "Save checkpoint response: " + result.ToString());
var response = result.AsDictionary<string, object>();
body.Put ("_rev", response.Get ("rev"));
_remoteCheckpoint = body;
LocalDatabase.SetLastSequence(LastSequence, RemoteCheckpointDocID(), !IsPull);
}
if (_overdueForSave) {
SaveLastSequence (completionHandler);
} else if (completionHandler != null) {
completionHandler ();
}
});
}
private void SaveLastSequence(SaveLastSequenceCompletionBlock completionHandler)
{
if (!lastSequenceChanged) {
if (completionHandler != null) {
completionHandler();
}
return;
}
if (_savingCheckpoint) {
// If a save is already in progress, don't do anything. (The completion block will trigger
// another save after the first one finishes.)
Task.Delay(500).ContinueWith(t => SaveLastSequence(completionHandler));
return;
}
lastSequenceChanged = false;
var lastSequence = LastSequence;
Log.To.Sync.I(Tag, "{0} checkpointing sequence={1}", this, lastSequence);
var body = new Dictionary<String, Object>();
if (_remoteCheckpoint != null) {
foreach (var pair in _remoteCheckpoint) {
body[pair.Key] = pair.Value;
}
}
body["lastSequence"] = lastSequence;
var remoteCheckpointDocID = RemoteCheckpointDocID();
if (String.IsNullOrEmpty(remoteCheckpointDocID)) {
Log.To.Sync.W(Tag, "remoteCheckpointDocID is null for {0}, aborting SaveLastSequence", this);
if (completionHandler != null) { completionHandler(); }
return;
}
_savingCheckpoint = true;
var message = _remoteSession.SendAsyncRequest(HttpMethod.Put, "/_local/" + remoteCheckpointDocID, body, (result, e) =>
{
_savingCheckpoint = false;
if (e != null) {
switch (GetStatusFromError(e)) {
case StatusCode.NotFound:
Log.To.Sync.I(Tag, "Got 404 from _local, ignoring...");
_remoteCheckpoint = null;
break;
case StatusCode.Conflict:
Log.To.Sync.I(Tag, "Got 409 from _local, retrying...");
RefreshRemoteCheckpointDoc();
break;
default:
Log.To.Sync.W(Tag, String.Format("Unable to save remote checkpoint for {0}", _replicatorID), e);
// TODO: On 401 or 403, and this is a pull, remember that remote
// TODO: is read-only & don't attempt to read its checkpoint next time.
break;
}
} else {
var response = result.AsDictionary<string, object>();
var rev = response.GetCast<string>("rev");
if(rev != null) {
body.SetRevID(rev);
}
_remoteCheckpoint = body;
var localDb = LocalDatabase;
if(localDb.Storage == null) {
Log.To.Sync.I(Tag, "Database is null or closed, ignoring remote checkpoint response");
if(completionHandler != null) {
completionHandler();
}
return;
}
localDb.SetLastSequence(LastSequence, remoteCheckpointDocID);
Log.To.Sync.I(Tag, "{0} saved remote checkpoint '{1}' (_rev={2})", this, lastSequence, rev);
}
if (completionHandler != null) {
completionHandler ();
}
}, true);
// This request should not be canceled when the replication is told to stop:
if(message != null) {
Task dummy;
_remoteSession?._requests.TryRemove(message, out dummy);
}
}
