private void InternalDump(DumpRequest request, IClient client)
{
try
{
// a sub directory for each date is created inside the dump path
var date = DateTime.Today.ToString("yyyy-MM-dd");
var fullPath = Path.Combine(request.Path, date);
if (!Directory.Exists(fullPath))
{
try
{
Directory.CreateDirectory(fullPath);
}
catch (Exception)
{
// ignore (race condition between nodes)
}
}
Parallel.ForEach(_dataStores, ds => ds.Value.Dump(request, ShardIndex));
// only the first node in the cluster should dump the schema as all shards have identical copies
if (request.ShardIndex == 0)
{
var schemaJson = GenerateSchema();
File.WriteAllText(Path.Combine(fullPath, Constants.SchemaFileName), schemaJson);
}
// save the sequences. Each shard has different values
var sb = new StringBuilder();
_jsonSerializer.Serialize(new JsonTextWriter(new StringWriter(sb)), _lastIdByGeneratorName);
var dumpSequenceFileName = $"sequence_{ShardIndex:D3}.json";
File.WriteAllText(Path.Combine(fullPath, dumpSequenceFileName), sb.ToString());
client.SendResponse(new NullResponse());
}
catch (AggregateException agg)
{
client.SendResponse(new ExceptionResponse(agg.InnerExceptions.First()));
}
catch (Exception e)
{
client.SendResponse(new ExceptionResponse(e));
}
}
/// <summary>
/// Dump all data to an external file
/// </summary>
/// <param name="path"></param>
public void Dump(string path)
{
var request = new DumpRequest {
Path = path, ShardIndex = ShardIndex
};
var response = Channel.SendRequest(request);
if (response is ExceptionResponse exResponse)
{
throw new CacheException("Error while dumping all data", exResponse.Message,
exResponse.CallStack);
}
}
private void InternalDump(DumpRequest request, IClient client)
{
try
{
// a sub directory for each date is created inside the dump path
var date = DateTime.Today.ToString("yyyy-MM-dd");
var fullPath = Path.Combine(request.Path, date);
if (!Directory.Exists(fullPath))
{
try
{
Directory.CreateDirectory(fullPath);
}
catch (Exception)
{
// ignore (race condition between nodes)
}
}
Parallel.ForEach(DataStores.Values, ds => ds.Dump(request.Path, ShardIndex));
// only the first node in the cluster should dump the schema as all shards have identical copies
if (request.ShardIndex == 0)
{
var schema = GenerateSchema();
_serviceContainer.SchemaPersistence.SaveSchema(schema, fullPath);
}
// save the sequences. Each shard has different values
var dumpSequenceFileName = $"sequence_{ShardIndex:D3}.json";
var sequencePath = Path.Combine(fullPath, dumpSequenceFileName);
_serviceContainer.SequencePersistence.SaveValues(_lastIdByGeneratorName, sequencePath);
client.SendResponse(new NullResponse());
}
catch (AggregateException agg)
{
client.SendResponse(new ExceptionResponse(agg.InnerExceptions.First()));
}
catch (Exception e)
{
client.SendResponse(new ExceptionResponse(e));
}
}
