/// <summary>
/// Store a collection of specified objects
/// </summary>
/// <param name="storableEnumerable">The objects collection to store.</param>
/// <param name="forceUpdate">Update all children ignoring the <see cref="!:IStorable.IsChanged" /> flag.</param>
/// <typeparam name="T">The type of the objects to store.</typeparam>
public void Store <T> (IEnumerable <T> storableEnumerable, bool forceUpdate = false) where T : IStorable
{
List <T> newDBObjects = new List <T> ();
lock (mutex) {
bool success = db.RunInTransaction(() => {
foreach (var t in storableEnumerable)
{
documentUpdated = false;
try {
var doc = db.GetExistingDocument(t.ID.ToString());
if (doc == null)
{
forceUpdate = true;
newDBObjects.Add(t);
}
StorableNode node;
ObjectChangedParser parser = new ObjectChangedParser();
parser.Parse(out node, t, Serializer.JsonSettings);
if (!forceUpdate)
{
Update(node);
}
if (forceUpdate)
{
DocumentsSerializer.SaveObject(t, db, saveChildren: true);
}
if (t.ID != Info.ID && (forceUpdate || documentUpdated))
{
Info.LastModified = DateTime.UtcNow;
DocumentsSerializer.SaveObject(Info, db);
}
foreach (IStorable storable in node.OrphanChildren)
{
db.GetDocument(DocumentsSerializer.StringFromID(storable.ID, t.ID)).Delete();
}
} catch (Exception ex) {
Log.Exception(ex);
return(false);
}
}
return(true);
});
if (!success)
{
throw new StorageException(Catalog.GetString("Error storing object from the storage"));
}
}
foreach (var newObject in newDBObjects)
{
// FIXME: StorageDeletedEvent should use a collection instead of having to send one event per storable
App.Current.EventsBroker.Publish(new StorageAddedEvent <T> {
Object = newObject, Sender = this
});
}
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
IStorable storable = value as IStorable;
if (context.SaveChildren && !context.Stack.Contains(value) && !context.Cache.IsCached(storable.ID))
{
DocumentsSerializer.SaveObject(storable, context.DB, context);
context.Cache.AddReference(storable);
}
writer.WriteValue(DocumentsSerializer.StringFromID(storable.ID, context.RootID));
}
/// <summary>
/// Delete the specified collection of storable object from the database.
/// If the object is configured to delete its children, we perform a bulk deletion of all the documents with
/// the the storable.ID prefix, which is faster than parsing the object and it ensures that we don't leave
/// orphaned documents in the DB
/// </summary>
/// <param name="storables">The objects to delete.</param>
/// <typeparam name="T">The type of the object to delete.</typeparam>
public void Delete <T> (IEnumerable <T> storables) where T : IStorable
{
lock (mutex) {
bool success = db.RunInTransaction(() => {
try {
foreach (T storable in storables)
{
if (storable.DeleteChildren)
{
Query query = db.CreateAllDocumentsQuery();
// This should work, but raises an Exception in Couchbase.Lite
//query.StartKey = t.ID;
//query.EndKey = t.ID + "\uefff";
// In UTF-8, from all the possible values in a GUID string, '0' is the first char in the
// list and 'f' would be the last one
string sepchar = DocumentsSerializer.ID_SEP_CHAR.ToString();
query.StartKey = storable.ID + sepchar + "00000000-0000-0000-0000-000000000000";
query.EndKey = storable.ID + sepchar + "ffffffff-ffff-ffff-ffff-ffffffffffff";
query.InclusiveEnd = true;
foreach (var row in query.Run())
{
row.Document.Delete();
}
}
db.GetDocument(storable.ID.ToString()).Delete();
}
return(true);
} catch (Exception ex) {
Log.Exception(ex);
return(false);
}
});
if (success)
{
Info.LastModified = DateTime.UtcNow;
DocumentsSerializer.SaveObject(Info, db, null, false);
// FIXME: StorageDeletedEvent should use a collection instead of having to send one event per storable
foreach (T storable in storables)
{
App.Current.EventsBroker.Publish(new StorageDeletedEvent <T> {
Object = storable, Sender = this
});
}
}
else
{
throw new StorageException(Catalog.GetString("Error deleting objects from the storage"));
}
}
}
void Update(StorableNode node, SerializationContext context = null)
{
if (context == null)
{
context = new SerializationContext(db, node.Storable.GetType());
context.RootID = node.Storable.ID;
}
if (node.IsChanged)
{
documentUpdated = true;
DocumentsSerializer.SaveObject(node.Storable, db, context, false);
}
/* Since we are saving single objects manually, we need to keep the stack
* updated to avoid problems with circular references */
context.Stack.Push(node.Storable);
foreach (StorableNode child in node.Children)
{
Update(child, context);
}
context.Stack.Pop();
}
