/// <summary>
/// Sends a deleteItem method to the clients that are sync'd to sequences that contain this item.
/// It does not send a delete message to the adapter/assembler but instead assumes that this
/// item is already have been deleted from the database or is being deleted in this transaction.
/// If you rollback the transaction, this message is also rolled back.
///
/// This version of the delete method causes clients to generate a conflict if they have a version
/// of the item that does not match the version of the item specified. You can use the
/// DeleteItemWithId method to unconditionally delete an item on the client if you do not have
/// the original version.
/// </summary>
/// <param name="destination">Name of the destination containing the item to be deleted.</param>
/// <param name="item">Version of the item to delete. Clients can detect a conflict if this version of the item does not match the version they are currently managing.</param>
public void DeleteItem(string destination, object item)
{
DataMessage dataMessage = new DataMessage();
DataDestination dataDestination = _dataService.GetDestination(destination) as DataDestination;
dataMessage.operation = DataMessage.DeleteOperation;
dataMessage.body = item;
dataMessage.destination = destination;
if (_clientId != null)
{
dataMessage.clientId = _clientId;
}
else
{
dataMessage.clientId = "srv:" + Guid.NewGuid().ToString("D");
}
dataMessage.identity = Identity.GetIdentity(item, dataDestination);
dataMessage.messageId = "srv:" + Guid.NewGuid().ToString("D") + ":" + _idCounter.ToString();
System.Threading.Interlocked.Increment(ref _idCounter);
ArrayList messages = new ArrayList(1);
messages.Add(dataMessage);
MessageBatch messageBatch = new MessageBatch(dataMessage, messages);
AddProcessedMessageBatch(messageBatch);
}
/// <summary>
/// Send an update event to clients subscribed to this message. Note that this method does not send
/// the change to the adapter/assembler - it assumes that the changes have already been applied
/// or are being applied. It only updates the clients with the new version of this data.
///
/// You must supply a destination parameter and a new version of the object. If you supply a
/// non-null previous version, this object is used to detect conflicts on the client in case
/// the client's version of the data does not match the previous version. You may also supply
/// a list of property names that have changed as a hint to the client to indicate which properties
/// should be checked for conflicts and updated. If you supply null for the changes, all
/// properties on the client are updated. These property names do not accept any kind of dot
/// notation to specify that a property of a property has changed. Only top level property
/// names are allowed.
/// </summary>
/// <param name="destination">Name of the Data Management Services destination that is managing the item you want to update.</param>
/// <param name="newVersion">New version of the item to update. The identity of the item is used to determine which item to update.</param>
/// <param name="previousVersion">If not null, this contains a version of the item you intend to update. The client can detect a conflict if its version does not match the previousVersion. If you specify the value as null, a conflict is only detected if the client has pending changes for the item being updated.</param>
/// <param name="changes">Array of property names which are to be updated. You can provide a null value to indicate that all property values may have changed.</param>
public void UpdateItem(string destination, object newVersion, object previousVersion, string[] changes)
{
DataMessage dataMessage = new DataMessage();
DataDestination dataDestination = _dataService.GetDestination(destination) as DataDestination;
object[] body = new object[3];
body[0] = changes;
body[2] = newVersion;
body[1] = previousVersion;
dataMessage.operation = DataMessage.UpdateOperation;
dataMessage.body = body;
dataMessage.destination = destination;
if (_clientId != null)
{
dataMessage.clientId = _clientId;
}
else
{
dataMessage.clientId = "srv:" + Guid.NewGuid().ToString("D");
}
dataMessage.identity = Identity.GetIdentity(newVersion, dataDestination);
dataMessage.messageId = "srv:" + Guid.NewGuid().ToString("D") + ":" + _idCounter.ToString();
System.Threading.Interlocked.Increment(ref _idCounter);
ArrayList messages = new ArrayList(1);
messages.Add(dataMessage);
MessageBatch messageBatch = new MessageBatch(dataMessage, messages);
_processedMessageBatches.Add(messageBatch);
}
void SyncSequenceChanges(DataMessage dataMessage, DataServiceTransaction dataServiceTransaction)
{
lock (_objLock) {
ArrayList sequenceList = new ArrayList(_sequenceIdToSequenceHash.Values.Count);
sequenceList.AddRange(_sequenceIdToSequenceHash.Values); //Hashtable may be changed here
foreach (Sequence sequence in sequenceList)
{
switch (dataMessage.operation)
{
case DataMessage.CreateOperation:
case DataMessage.CreateAndSequenceOperation:
RefreshSequence(sequence, dataMessage, dataMessage.body, dataServiceTransaction);
break;
case DataMessage.DeleteOperation: {
//RefreshSequence(sequence, dataMessage, dataMessage.body, dataServiceTransaction);
Identity identity = Identity.GetIdentity(dataMessage.body, _dataDestination);
int index = sequence.IndexOf(identity);
if (index != -1)
{
RemoveIdentityFromSequence(sequence, identity, dataServiceTransaction);
}
}
break;
case DataMessage.UpdateOperation:
RefreshSequence(sequence, dataMessage, (dataMessage.body as IList)[2], dataServiceTransaction);
break;
}
}
}
}
public Sequence RefreshSequence(Sequence sequence, DataMessage dataMessage, object item, DataServiceTransaction dataServiceTransaction)
{
if (sequence.Parameters == null)
{
return(sequence);
}
DotNetAdapter dotNetAdapter = _dataDestination.ServiceAdapter as DotNetAdapter;
if (dotNetAdapter != null)
{
bool isCreate = (dataMessage.operation == DataMessage.CreateOperation || dataMessage.operation == DataMessage.CreateAndSequenceOperation);
int fill = dotNetAdapter.RefreshFill(sequence.Parameters, item, isCreate);
switch (fill)
{
case Assembler.ExecuteFill: {
IList parameters = sequence.Parameters;
//if (parameters == null)
// parameters = new object[0];
DataMessage fillDataMessage = new DataMessage();
fillDataMessage.clientId = dataMessage.clientId;
fillDataMessage.operation = DataMessage.FillOperation;
fillDataMessage.body = parameters != null ? parameters : new object[0];
IList result = _dataDestination.ServiceAdapter.Invoke(fillDataMessage) as IList;
return(CreateSequence(dataMessage.clientId as string, result, parameters, dataServiceTransaction));
}
case Assembler.AppendToFill: {
Identity identity = Identity.GetIdentity(item, _dataDestination);
if (!sequence.Contains(identity))
{
AddIdentityToSequence(sequence, identity, dataServiceTransaction);
}
_itemIdToItemHash[identity] = new ItemWrapper(item);
}
break;
case Assembler.RemoveFromFill: {
Identity identity = Identity.GetIdentity(item, _dataDestination);
if (sequence.Contains(identity))
{
RemoveIdentityFromSequence(sequence, identity, dataServiceTransaction);
}
}
break;
case Assembler.DoNotExecuteFill:
break;
}
}
return(sequence);
}
public Sequence CreateSequence(string clientId, IList result, IList parameters, DataServiceTransaction dataServiceTransaction)
{
Sequence sequence = null;
Identity[] identities = new Identity[result.Count];
lock (_objLock) {
for (int i = 0; i < identities.Length; i++)
{
if (result[i] != null)
{
Identity identity = Identity.GetIdentity(result[i], _dataDestination);
identities[i] = identity;
if (!_itemIdToItemHash.ContainsKey(identity))
{
_itemIdToItemHash.Add(identity, new ItemWrapper(result[i]));
}
else
{
ItemWrapper itemWrapper = _itemIdToItemHash[identity] as ItemWrapper;
itemWrapper.Instance = result[i];
}
}
}
//Lookup existing sequence
if (parameters != null)
{
if (_parametersToSequenceIdHash.Contains(parameters))
{
sequence = _parametersToSequenceIdHash[parameters] as Sequence;
}
}
else
{
IDictionary sequenceIdMap = _itemIdToSequenceIdMapHash[identities[0]] as IDictionary;
if (sequenceIdMap != null)
{
foreach (Sequence sequenceTmp in sequenceIdMap.Values)
{
if (sequenceTmp.Parameters == null)
{
sequence = sequenceTmp;
break;
}
}
}
}
//if (parameters == null)
// parameters = new ArrayList();
if (sequence == null)
{
sequence = new Sequence();
sequence.Id = sequence.GetHashCode();
object[] parametersArray = null;
if (parameters != null)
{
parametersArray = new object[parameters.Count];
parameters.CopyTo(parametersArray, 0);
sequence.Parameters = parametersArray;
_parametersToSequenceIdHash[parameters] = sequence;
}
for (int i = 0; i < identities.Length; i++)
{
Identity identity = identities[i];
AddIdentityToSequence(sequence, identity, dataServiceTransaction);
}
_sequenceIdToSequenceHash[sequence.Id] = sequence;
if (log.IsDebugEnabled)
{
log.Debug(__Res.GetString(__Res.SequenceManager_CreateSeq, sequence.Id, clientId));
}
}
else
{
for (int i = 0; i < identities.Length; i++)
{
Identity identity = identities[i];
Identity existingIdentity = null;
if (i < sequence.Count)
{
existingIdentity = sequence[i];
}
if (!identity.Equals(existingIdentity))
{
//Identity not found in sequence
if (!sequence.Contains(identity))
{
int position = AddIdentityToSequence(sequence, identity, dataServiceTransaction);
}
}
}
}
sequence.AddSubscriber(clientId);
ArrayList sequences;
if (_clientIdToSequenceHash.Contains(clientId))
{
sequences = _clientIdToSequenceHash[clientId] as ArrayList;
}
else
{
sequences = new ArrayList();
_clientIdToSequenceHash[clientId] = sequences;
}
if (!sequences.Contains(sequence))
{
sequences.Add(sequence);
}
}
return(sequence);
}