/// <summary>
/// Saves the given Triple Store to the Target Store that this class was instantiated with
/// </summary>
/// <param name="store">Store to Save</param>
/// <param name="parameters">Parameters for the Store</param>
public override void Save(ITripleStore store, IStoreParams parameters)
{
if (parameters is ThreadedSqlIOParams)
{
//Setup context
ThreadedSqlStoreWriterContext context = new ThreadedSqlStoreWriterContext(store, (ThreadedSqlIOParams)parameters);
bool transSetting = context.Manager.DisableTransactions;
context.Manager.DisableTransactions = true;
//Queue Graphs for Writing
foreach (IGraph g in store.Graphs)
{
context.Add(g);
}
//Start making the async calls
List<IAsyncResult> results = new List<IAsyncResult>();
WriteGraphsDelegate d = new WriteGraphsDelegate(this.WriteGraphs);
for (int i = 0; i < context.Threads; i++)
{
results.Add(d.BeginInvoke(context, null, null));
}
//Wait for all the async calls to complete
WaitHandle.WaitAll(results.Select(r => r.AsyncWaitHandle).ToArray());
RdfThreadedOutputException outputEx = new RdfThreadedOutputException(WriterErrorMessages.ThreadedOutputFailure("Folder Store"));
foreach (IAsyncResult result in results)
{
try
{
d.EndInvoke(result);
}
catch (Exception ex)
{
outputEx.AddException(ex);
}
}
//Reset Transactions setting
context.Manager.DisableTransactions = transSetting;
//If there were any errors we'll throw an RdfThreadedOutputException now
if (outputEx.InnerExceptions.Any()) throw outputEx;
}
else
{
throw new RdfStorageException("Parameters for the ThreadedSQLStoreWriter must be of type ThreadedSQLIOParams");
}
}
/// <summary>
/// Internal Worker method for Writer Threads
/// </summary>
private void WriteGraphs(ThreadedSqlStoreWriterContext context)
{
try
{
int thread = Thread.CurrentThread.ManagedThreadId;
SqlWriter writer = new SqlWriter(context.Manager);
IGraph g = context.GetNextGraph();
while (g != null)
{
//Write the Graph to the Target Store
writer.Save(g, context.ClearIfExists);
//Get Next Graph
g = context.GetNextGraph();
}
}
catch (ThreadAbortException)
{
//We've been terminated, don't do anything
Thread.ResetAbort();
}
catch (Exception ex)
{
throw new RdfStorageException("Error in Threaded Writer in Thread ID " + Thread.CurrentThread.ManagedThreadId, ex);
}
}
