public static async Task Execute(string targetConnectionString, string sourceConnectionString)
{
var now = DateTime.Now;
using var tokenSource = new CancellationTokenSource();
var token = tokenSource.Token;
await using var snowflakeConnection = await CreateSnowflakeConnection(targetConnectionString);
using var databaseConnection = OracleDatabaseSource.Create(sourceConnectionString);
using var tablesQueue = new PipelineQueue <DataSourceSlice>("tables", token);
using var processQueue = new PipelineQueue <DataSourceFile>("process", token);
using var uploadQueue = new PipelineQueue <UploadItem>("upload", token);
using var resolveQueue = new PipelineQueue <DataSource>("resolve", token);
var sources = Primer.GetSources().ToDictionary(k => k.LifetimeKey);
await DoIt(
new StorageManager(snowflakeConnection),
databaseConnection,
sources,
tablesQueue,
processQueue,
uploadQueue,
resolveQueue,
new LifetimeReference <string>(
// ReSharper disable once AccessToDisposedClosure
v => resolveQueue.Enqueue(sources[v])
),
token
);
Console.WriteLine($@"start:{now} end:{DateTime.Now} diff:{DateTime.Now - now}");
}
private static async Task DoIt(
StorageManager credentialManager,
IDatabaseSource databaseConnection,
IDictionary <string, DataSource> sources,
PipelineQueue <DataSourceSlice> tablesQueue,
PipelineQueue <DataSourceFile> processQueue,
PipelineQueue <UploadItem> uploadQueue,
PipelineQueue <DataSource> resolveQueue,
LifetimeReference <string> lifetimeController,
CancellationToken token
)
{
var tableTasks = tablesQueue.CreatePump(
pipeFactory: () => new ExportPipelineTask(
connection: databaseConnection,
emitFile: state =>
{
lifetimeController.AddRef(state.DataSourceSlice.LifetimeKey);
processQueue.Enqueue(
new DataSourceFile(
state.Filename,
state.DataSourceSlice.LifetimeKey,
state.RowCount)
);
},
feedback: state =>
{
if (state.State != ExportPipelineTask.ExportFeedbackState.Complete)
{
return;
}
Console.Out.WriteLine(
$@"{state.Filename:-40}:State:{state.State}:Rows:{state.RowCount:D16}:TotalRows:{state.TotalRowCount:D16}"
);
}
),
threadCount: 4,
action: slice => lifetimeController.Release(slice.LifetimeKey)
);
var processTasks = processQueue.CreatePump(
pipeFactory: () => new ProcessPipelineTask(credentialManager),
threadCount: 1,
action: batch => uploadQueue.Enqueue(batch)
);
var uploadTasks = uploadQueue.CreatePump(
pipeFactory: () => new UploadPipelineTask(),
threadCount: 4,
action: batch => lifetimeController.Release(batch.LifetimeKey)
);
var resolveTasks = resolveQueue.CreatePump(
pipeFactory: () => new ResolvePipelineTask(),
threadCount: 1,
action: batch => Console.WriteLine($@"**************** Done File {batch}")
);
await Task.Run(
() =>
{
foreach (var item in Primer.Prime(sources.Values))
{
lifetimeController.AddRef(item.LifetimeKey);
tablesQueue.Enqueue(item);
}
tablesQueue.Complete();
},
token
);
await Task.WhenAll(tableTasks);
processQueue.Complete();
await Task.WhenAll(processTasks);
uploadQueue.Complete();
await Task.WhenAll(uploadTasks);
resolveQueue.Complete();
await Task.WhenAll(resolveTasks);
}