public static async Task MigrateNoSqlDatabase(
AbstractMigrationConfiguration configuration,
Func <string, string, JsonTextWriter, StreamWriter, Task> migrateSingleCollection,
Func <JsonTextWriter, StreamWriter, Task> migrateAttachments = null)
{
Stream stream;
if (configuration.ConsoleExport)
{
stream = Console.OpenStandardOutput();
}
else
{
var fileName = $"Dump of {configuration.DatabaseName} {DateTime.UtcNow.ToString("yyyy-MM-dd HH-mm", CultureInfo.InvariantCulture)}.ravendbdump";
var basePath = string.IsNullOrWhiteSpace(configuration.ExportFilePath) ? Directory.GetCurrentDirectory() : configuration.ExportFilePath;
stream = File.Create(Path.Combine(basePath, fileName));
}
using (GetStream(configuration, stream, out var outStream))
await using (var streamWriter = new StreamWriter(outStream))
using (var jsonTextWriter = new JsonTextWriter(streamWriter))
{
if (configuration.ConsoleExport == false)
{
jsonTextWriter.Formatting = Formatting.Indented;
}
await jsonTextWriter.WriteStartObjectAsync();
await jsonTextWriter.WritePropertyNameAsync("BuildVersion");
await jsonTextWriter.WriteValueAsync(RavenVersionAttribute.Instance.BuildVersion);
await jsonTextWriter.WritePropertyNameAsync("Docs");
await jsonTextWriter.WriteStartArrayAsync();
foreach (var collection in configuration.CollectionsToMigrate)
{
var mongoCollectionName = collection.Name;
var ravenCollectionName = collection.NewName;
if (string.IsNullOrWhiteSpace(ravenCollectionName))
{
ravenCollectionName = mongoCollectionName;
}
await migrateSingleCollection(mongoCollectionName, ravenCollectionName, jsonTextWriter, streamWriter);
}
if (migrateAttachments != null)
{
await migrateAttachments(jsonTextWriter, streamWriter);
}
await jsonTextWriter.WriteEndArrayAsync();
await jsonTextWriter.WriteEndObjectAsync();
}
}
private static IDisposable GetStream(
AbstractMigrationConfiguration configuration,
Stream stream, out Stream outStream)
{
if (configuration.ConsoleExport)
{
outStream = stream;
return(new DisposableAction(stream.Dispose));
}
var gzipStream = outStream = new GZipStream(stream, CompressionMode.Compress, leaveOpen: true);
return(new DisposableAction(() =>
{
using (stream)
using (gzipStream)
{
}
}));
}
public static void OutputClass(
AbstractMigrationConfiguration configuration,
object obj)
{
if (configuration.ConsoleExport)
{
var jsonString = JsonConvert.SerializeObject(obj);
Console.WriteLine(jsonString);
return;
}
foreach (var prop in obj.GetType().GetProperties())
{
var value = prop.GetValue(obj, null);
if (value is List <string> list)
{
value = string.Join(", ", list);
}
Console.WriteLine("{0}: {1}", prop.Name, value);
}
}
