public CRUDSubscriptionEvent(EventType type, Schema schema, Row row, DataTimeStamp version)
{
Type = type;
Schema = schema;
Row = row;
Version = version;
}
public CRUDSubscriptionEvent(EventType type, Schema schema, Row row, DataTimeStamp version)
{
Type = type;
Schema = schema;
Row = row;
Version = version;
}
public ErlCRUDQueryExecutionContext(ErlDataStore store, ErlMbox erlMBox = null, DataTimeStamp? ts = null)
{
this.DataStore = store;
ErlMailBox = erlMBox;
SubscriptionTimestamp = ts;
}
private void process(IQueable msg)
{
try
{
if (msg is ErlException)
{
this.Mailbox.DeliverError(this, (ErlException)msg);
return;
}
var erlMsg = msg as ErlMsg;
if (erlMsg == null)
throw new ErlException("Invalid message type: " + msg.GetType());
var map = ((ErlDataStore)Store).Map;
var binding = new ErlVarBind();
//{Schema, TS, ChangeType :: $d | $w, [{schema, Flds...}]} %% delete, write(upsert)
//{Schema, TS, ChangeType :: $D | $C | $c, []} %% Drop, Create, Clear
if (erlMsg.Msg==null ||
!erlMsg.Msg.Match(SUBSCRIPTION_MSG_PATTERN, binding))
return;
var schemaName = ((ErlAtom)binding[SCHEMA]).Value;
var ts = binding[TIMESTAMP].ValueAsLong;
var op = (char)((ErlByte)binding[TYPE]).Value;
var rows = ((ErlList)binding[ROWS]).Value;
var schema = map.GetCRUDSchemaForName(schemaName);
m_LastTimeStamp = new DataTimeStamp(ts);
CRUDSubscriptionEvent.EventType etp;
switch(op)
{
case 'd': etp = CRUDSubscriptionEvent.EventType.RowDelete; break;
case 'c': etp = CRUDSubscriptionEvent.EventType.TableClear; break;
case 'D': etp = CRUDSubscriptionEvent.EventType.TableDrop; break;
case 'C': etp = CRUDSubscriptionEvent.EventType.TableCreate; break;
default: etp = CRUDSubscriptionEvent.EventType.RowUpsert; break;
}
if (rows.Count>0)
{
int errors = 0;
foreach(var rowTuple in rows.Cast<ErlTuple>())
{
try
{
var row = map.ErlTupleToRow(schemaName, rowTuple, schema);
var data = new CRUDSubscriptionEvent(etp, schema, row, new DataTimeStamp(ts));
this.Mailbox.Deliver(this, data);
}
catch(Exception ie)
{
errors++;
log(MessageType.Error, "prcs().forea(rTpl)", ie.ToMessageWithType(), ie);
}
}
// TODO: Add error reporting to user
}
else
{ //used to clear data, no rows are fetched
var data = new CRUDSubscriptionEvent(etp, schema, null, new DataTimeStamp(ts));
this.Mailbox.Deliver(this, data);
}
}
catch(Exception err)
{
log(MessageType.Error, "prcs().outcatch{}", err.ToMessageWithType(), err);
}
}
