internal bool PostChangeNotifications()
{
bool posted = false;
// This is a 'while' instead of an 'if' because when we finish posting notifications, there
// might be new ones that have arrived as a result of notification handlers making document
// changes of their own (the replicator manager will do this.) So we need to check again.
while (!Storage.InTransaction && _isOpen && !_isPostingChangeNotifications && _changesToNotify != null && _changesToNotify.Count > 0) {
try {
_isPostingChangeNotifications = true;
IList<DocumentChange> outgoingChanges = new List<DocumentChange>();
foreach (var change in _changesToNotify) {
outgoingChanges.Add(change);
}
_changesToNotify.Clear();
// TODO: change this to match iOS and call cachedDocumentWithID
var isExternal = false;
foreach (var change in outgoingChanges) {
var document = GetDocument(change.DocumentId);
document.RevisionAdded(change, true);
if (change.SourceUrl != null) {
isExternal = true;
}
}
var args = new DatabaseChangeEventArgs {
Changes = outgoingChanges,
IsExternal = isExternal,
Source = this
};
var changeEvent = _changed;
if (changeEvent != null)
changeEvent(this, args);
posted = true;
} catch (Exception e) {
Log.E(TAG, "Got exception posting change notifications", e);
} finally {
_isPostingChangeNotifications = false;
}
}
return posted;
}
private void OnDatabaseChanged (object sender, DatabaseChangeEventArgs e)
{
if (_willUpdate) {
return;
}
var updateInterval = _updateInterval * 2;
foreach (var change in e.Changes) {
if (change.SourceUrl == null) {
updateInterval /= 2;
break;
}
}
_willUpdate = true;
Log.D(TAG, "Will update after {0} sec...", updateInterval);
Task.Delay(TimeSpan.FromSeconds(updateInterval)).ContinueWith(t =>
{
if(_willUpdate) {
Update();
}
});
}
private void OnChanged(Object sender, DatabaseChangeEventArgs args)
{
var changes = args.Changes;
foreach (DocumentChange change in changes)
{
// Skip revisions that originally came from the database I'm syncing to:
var source = change.SourceUrl;
if (source != null && source.Equals(RemoteUrl)) {
return;
}
var rev = change.AddedRevision;
if (LocalDatabase.RunFilter(_filter, FilterParams, rev)) {
AddToInbox(rev);
}
}
}
internal void PostChangeNotifications()
{
// This is a 'while' instead of an 'if' because when we finish posting notifications, there
// might be new ones that have arrived as a result of notification handlers making document
// changes of their own (the replicator manager will do this.) So we need to check again.
while (transactionLevel == 0 && open && !PostingChangeNotifications && ChangesToNotify.Count > 0)
{
try
{
PostingChangeNotifications = true;
IList<DocumentChange> outgoingChanges = new AList<DocumentChange>();
foreach (var change in ChangesToNotify)
{
outgoingChanges.Add(change);
}
ChangesToNotify.Clear();
Boolean isExternal = false;
foreach (var change in outgoingChanges)
{
Document document = GetDocument(change.DocumentId);
document.RevisionAdded(change);
if (change.SourceUrl != null)
{
isExternal = true;
}
}
var args = new DatabaseChangeEventArgs {
Changes = outgoingChanges,
IsExternal = isExternal,
Source = this
} ;
var changeEvent = Changed;
if (changeEvent != null)
changeEvent(this, args);
}
catch (Exception e)
{
Log.E(Database.Tag, this + " got exception posting change notifications", e);
}
finally
{
PostingChangeNotifications = false;
}
}
}
private void OnDatabaseChanged (object sender, DatabaseChangeEventArgs e)
{
if (_willUpdate) {
return;
}
var updateInterval = _updateInterval * 2;
foreach (var change in e.Changes) {
if (change.SourceUrl == null) {
updateInterval /= 2;
break;
}
}
_willUpdate = true;
var updateDelay = ((_lastUpdatedAt + TimeSpan.FromSeconds(updateInterval)) - DateTime.Now).TotalSeconds;
updateDelay = Math.Max(0, Math.Min(_updateInterval, updateDelay));
Log.To.Query.I(TAG, "{0} will update after {1} sec...", this, updateDelay);
Task.Delay(TimeSpan.FromSeconds(updateDelay)).ContinueWith(t =>
{
if(_willUpdate) {
Update();
}
});
}
private void OnDatabaseChanged (object sender, DatabaseChangeEventArgs e)
{
Log.D(Tag, "OnDatabaseChanged() called");
Update();
}
internal void OnChanged(Object sender, DatabaseChangeEventArgs args)
{
var changes = args.Changes;
foreach (DocumentChange change in changes)
{
// Skip revisions that originally came from the database I'm syncing to:
var source = change.SourceUrl;
if (source != null && source.Equals(RemoteUrl))
{
return;
}
var rev = change.AddedRevision;
IDictionary<String, Object> paramsFixMe = null;
// TODO: these should not be null
if (LocalDatabase.RunFilter(filter, paramsFixMe, rev))
{
AddToInbox(rev);
}
}
}
private void OnChanged(Object sender, DatabaseChangeEventArgs args)
{
var changes = args.Changes;
foreach (DocumentChange change in changes)
{
// Skip expired documents
if (change.IsExpiration) {
return;
}
// Skip revisions that originally came from the database I'm syncing to:
var source = change.SourceUrl;
if (source != null && source.Equals(RemoteUrl)) {
return;
}
var rev = change.AddedRevision;
if (LocalDatabase.RunFilter(_filter, FilterParams, rev)) {
Log.To.Sync.V(TAG, "{0} queuing {1} {2}", this, LocalDatabase.GetSequence(rev), rev);
AddToInbox(rev);
}
}
}
private void PurgeExpired(object state)
{
if (!_purgeActive) {
_purgeActive = true;
Log.To.Database.V(TAG, "{0} running purge job NOW...", this);
if (Storage == null || !Storage.IsOpen) {
Log.To.Database.W(TAG, "{0} storage is null or closed, cannot run purge job, returning early...", this);
return;
}
var results = Storage?.PurgeExpired() ?? new List<string>();
var changedEvt = _changed;
if (results.Count > 0) {
Log.To.Database.I(TAG, "{0} purged {1} expired documents", this, results.Count);
if (changedEvt != null) {
var changes = new List<DocumentChange>();
var args = new DatabaseChangeEventArgs();
args.Source = this;
foreach (var result in results) {
var change = new DocumentChange(new RevisionInternal(result, null, true), null, false, null);
change.IsExpiration = true;
changes.Add(change);
}
args.Changes = changes;
changedEvt(this, args);
}
}
_purgeActive = false;
SchedulePurgeExpired(TimeSpan.FromSeconds(1));
} else {
Log.To.Database.I(TAG, "Purge already running, will try again later...");
}
}
internal bool PostChangeNotifications()
{
bool posted = false;
// This is a 'while' instead of an 'if' because when we finish posting notifications, there
// might be new ones that have arrived as a result of notification handlers making document
// changes of their own (the replicator manager will do this.) So we need to check again.
while((Storage == null || !Storage.InTransaction) && IsOpen && !_isPostingChangeNotifications
&& _changesToNotify != null && _changesToNotify.Count > 0) {
try {
_isPostingChangeNotifications = true;
IList<DocumentChange> outgoingChanges = new List<DocumentChange>();
foreach(var change in _changesToNotify) {
outgoingChanges.Add(change);
}
_changesToNotify.Clear();
// TODO: change this to match iOS and call cachedDocumentWithID
var isExternal = false;
foreach(var change in outgoingChanges) {
var document = GetDocument(change.DocumentId);
if(document == null) {
continue;
}
document.RevisionAdded(change, true);
if(change.SourceUrl != null) {
isExternal = true;
}
}
var args = new DatabaseChangeEventArgs {
Changes = outgoingChanges,
IsExternal = isExternal,
Source = this
};
Log.To.Database.I(TAG, "{0} posting change notifications: seq {1}", this,
new LogJsonString(from change in outgoingChanges select change.AddedRevision.Sequence));
Log.To.TaskScheduling.V(TAG, "Scheduling Change callback...");
Manager.CapturedContext.StartNew(() =>
{
var changeEvent = _changed;
if(changeEvent != null) {
Log.To.TaskScheduling.V(TAG, "Firing Change callback...");
changeEvent(this, args);
} else {
Log.To.TaskScheduling.V(TAG, "Change callback is null, not firing...");
}
});
posted = true;
} catch(Exception e) {
Log.To.Database.E(TAG, "Got exception posting change notifications", e);
} finally {
_isPostingChangeNotifications = false;
}
}
return posted;
}
