private bool PutFragsSequentially(FragmentationInfo fragInfo,
byte[] infoKey, int ttl, IList <FingerprintedData> fragments)
{
string info_key_string = Encoding.UTF8.GetString(infoKey);
//Put pieces
int index = 0;
foreach (FingerprintedData fpd in fragments)
{
byte[] serializedFpd = fpd.SerializeTo();
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Size after serialization {0}", serializedFpd.Length));
int i = index++;
bool succ = false;
int retries = 3;
byte[] piece_key = BuildFragmentKey(fragInfo.BaseKey, i);
string piece_key_string = Encoding.UTF8.GetString(piece_key);
for (; !succ && retries > 0; retries--)
{
if (retries < 3)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Retrying..."));
}
succ = _dht.Put(piece_key, serializedFpd, ttl);
if (!succ)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Put failed."));
}
}
if (retries <= 0)
{
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Retries exhausted when putting piece : {0}",
piece_key_string));
return(false);
}
else
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Piece {0} successfully put to DHT", piece_key_string));
}
}
//Put info
bool succ_info = false;
int retries_info = 3;
for (; !succ_info && retries_info > 0; retries_info--)
{
if (retries_info < 3)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Retrying..."));
}
succ_info = _dht.Put(infoKey, fragInfo.SerializeTo(), ttl);
}
if (retries_info <= 0)
{
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Retries exhausted when putting FragmentationInfo : {0}",
info_key_string));
return(false);
}
else
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("FragmentationInfo successfully put to DHT with name {0}",
info_key_string));
}
return(true);
}
/// <summary>
/// Concurrently puts pieces into DHT
/// </summary>
/// <returns>True if successful</returns>
private bool PutFragsConcurrently(FragmentationInfo fragInfo,
byte[] infoKey, int ttl, IList <FingerprintedData> fragments)
{
bool ret;
//prepare the global state
int max_enqueues = 1; //we only need a true/false answer
BlockingQueue bq_result = new BlockingQueue(max_enqueues);
AsyncPutFragsGlobalState global_state =
new AsyncPutFragsGlobalState(fragments.Count, fragInfo.BaseKey, bq_result);
//@TODO tweak the number of concurrency_degree here.
int concurrency_degree = Concurrency;
global_state.Concurrency = concurrency_degree;
//Put pieces
for (int index = 0; index < fragments.Count; index++)
{
FingerprintedData fpd = fragments[index];
byte[] serializedFpd = fpd.SerializeTo();
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Size after serialization {0}", serializedFpd.Length));
byte[] piece_key = BuildFragmentKey(fragInfo.BaseKey, index);
string piece_key_string = Encoding.UTF8.GetString(piece_key);
//piece state
AsyncOpState aps = new AsyncOpState(piece_key, serializedFpd, ttl);
AsyncFragsOpState apfs = new AsyncFragsOpState(global_state, aps);
//async put, one instance of IDht per put because thread safty not guaranteed
IDht proxy = DhtServiceClient.GetXmlRpcDhtClient(_svc_uri.Port);
BrunetDhtClientOperations brdht_ops = new BrunetDhtClientOperations(
proxy);
// Fire the async XML-RPC call.
lock (global_state.SyncRoot) {
brdht_ops.BeginPutWithCallback(piece_key, serializedFpd, ttl,
new AsyncCallback(this.OnDhtPutReturns), apfs);
}
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Put piece {0} to DHT began (asynchronously)",
piece_key_string));
if ((concurrency_degree > 1 && (index + 1) % concurrency_degree == 0) ||
index == fragments.Count - 1)
{
// Stop to wait for batch finish or all finish
global_state.BatchFinishedEvent.WaitOne();
if (concurrency_degree > 1)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Batch {0} finished. Moving on",
(int)((index + 1) / concurrency_degree)));
}
}
}
//block here until result comes
PutFragsStoppedEventArgs stop_args =
(PutFragsStoppedEventArgs)bq_result.Dequeue();
// Deal with info object.
if (stop_args.IsSuccessful)
{
ret = _dht.Put(infoKey, fragInfo.SerializeTo(), ttl);
if (ret)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("FragmentationInfo {0} successfully put",
Encoding.UTF8.GetString(infoKey)));
}
}
else
{
ret = false;
}
return(ret);
}
private bool PutFragsInBulk(FragmentationInfo fragInfo,
byte[] infoKey, int ttl, IList <FingerprintedData> fragments)
{
string info_key_string = Encoding.UTF8.GetString(infoKey);
XmlRpcStruct[] parameters = new XmlRpcStruct[fragments.Count];
// Prepare parameters for bulk put.
int index = 0;
foreach (FingerprintedData fpd in fragments)
{
byte[] serializedFpd = fpd.SerializeTo();
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Size of piece {0} after serialization: {1}", index,
serializedFpd.Length));
byte[] piece_key = BuildFragmentKey(fragInfo.BaseKey, index);
XmlRpcStruct param_dict = new XmlRpcStruct();
param_dict.Add("name", piece_key);
param_dict.Add("value", serializedFpd);
param_dict.Add("ttl", ttl);
parameters[index] = param_dict;
index++;
}
bool[] results;
try {
results = _dht.BulkPut(parameters);
} catch (Exception ex) {
// Network related operation, log the exception and let it be handled
// upper stream caller.
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Exception caught in BulkPut"));
Logger.WriteLineIf(LogLevel.Error, _log_props,
ex);
throw;
}
IList <int> failed_pieces = new List <int>();
for (int i = 0; i < results.Length; i++)
{
bool result = results[i];
if (!result)
{
failed_pieces.Add(i);
}
}
// Log failed pieces
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Failed {0} pieces are:", failed_pieces.Count));
StringBuilder sb = new StringBuilder();
foreach (int pieceIndx in failed_pieces)
{
sb.Append(pieceIndx);
sb.Append(" ");
}
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
sb.ToString());
// Decide whether to retry.
if (failed_pieces.Count > 20)
{
Logger.WriteLineIf(LogLevel.Info, _log_props,
string.Format("Too many pieces failed. Returning..."));
return(false);
}
//Retry failed pieces.
foreach (int pieceIndx in failed_pieces)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Retrying piece {0}", pieceIndx));
bool succ_retries = PutWithRetries((byte[])parameters[pieceIndx]["name"], (byte[])
parameters[pieceIndx]["value"], (int)parameters[pieceIndx]["ttl"], 2);
if (!succ_retries)
{
// Cannot succeed on this piece even after retry...
return(false);
}
}
//Put info
bool succ_info = PutWithRetries(infoKey, fragInfo.SerializeTo(), ttl, 2);
return(succ_info);
}
private bool PutFragsSequentially(FragmentationInfo fragInfo,
byte[] infoKey, int ttl, IList<FingerprintedData> fragments)
{
string info_key_string = Encoding.UTF8.GetString(infoKey);
//Put pieces
int index = 0;
foreach (FingerprintedData fpd in fragments) {
byte[] serializedFpd = fpd.SerializeTo();
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Size after serialization {0}", serializedFpd.Length));
int i = index++;
bool succ = false;
int retries = 3;
byte[] piece_key = BuildFragmentKey(fragInfo.BaseKey, i);
string piece_key_string = Encoding.UTF8.GetString(piece_key);
for (; !succ && retries > 0; retries--) {
if (retries < 3) {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Retrying..."));
}
succ = _dht.Put(piece_key, serializedFpd, ttl);
if (!succ) {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Put failed."));
}
}
if (retries <= 0) {
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Retries exhausted when putting piece : {0}",
piece_key_string));
return false;
} else {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Piece {0} successfully put to DHT", piece_key_string));
}
}
//Put info
bool succ_info = false;
int retries_info = 3;
for (; !succ_info && retries_info > 0; retries_info--) {
if (retries_info < 3) {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Retrying..."));
}
succ_info = _dht.Put(infoKey, fragInfo.SerializeTo(), ttl);
}
if (retries_info <= 0) {
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Retries exhausted when putting FragmentationInfo : {0}",
info_key_string));
return false;
} else {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("FragmentationInfo successfully put to DHT with name {0}",
info_key_string));
}
return true;
}
private bool PutFragsInBulk(FragmentationInfo fragInfo,
byte[] infoKey, int ttl, IList<FingerprintedData> fragments)
{
string info_key_string = Encoding.UTF8.GetString(infoKey);
XmlRpcStruct[] parameters = new XmlRpcStruct[fragments.Count];
// Prepare parameters for bulk put.
int index = 0;
foreach (FingerprintedData fpd in fragments) {
byte[] serializedFpd = fpd.SerializeTo();
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Size of piece {0} after serialization: {1}", index,
serializedFpd.Length));
byte[] piece_key = BuildFragmentKey(fragInfo.BaseKey, index);
XmlRpcStruct param_dict = new XmlRpcStruct();
param_dict.Add("name", piece_key);
param_dict.Add("value", serializedFpd);
param_dict.Add("ttl", ttl);
parameters[index] = param_dict;
index++;
}
bool[] results;
try {
results = _dht.BulkPut(parameters);
} catch (Exception ex) {
// Network related operation, log the exception and let it be handled
// upper stream caller.
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Exception caught in BulkPut"));
Logger.WriteLineIf(LogLevel.Error, _log_props,
ex);
throw;
}
IList<int> failed_pieces = new List<int>();
for (int i = 0; i < results.Length; i++) {
bool result = results[i];
if (!result) {
failed_pieces.Add(i);
}
}
// Log failed pieces
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Failed {0} pieces are:", failed_pieces.Count));
StringBuilder sb = new StringBuilder();
foreach (int pieceIndx in failed_pieces) {
sb.Append(pieceIndx);
sb.Append(" ");
}
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
sb.ToString());
// Decide whether to retry.
if (failed_pieces.Count > 20) {
Logger.WriteLineIf(LogLevel.Info, _log_props,
string.Format("Too many pieces failed. Returning..."));
return false;
}
//Retry failed pieces.
foreach (int pieceIndx in failed_pieces) {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Retrying piece {0}", pieceIndx));
bool succ_retries = PutWithRetries((byte[])parameters[pieceIndx]["name"], (byte[])
parameters[pieceIndx]["value"], (int)parameters[pieceIndx]["ttl"], 2);
if (!succ_retries) {
// Cannot succeed on this piece even after retry...
return false;
}
}
//Put info
bool succ_info = PutWithRetries(infoKey, fragInfo.SerializeTo(), ttl, 2);
return succ_info;
}
/// <summary>
/// Concurrently puts pieces into DHT
/// </summary>
/// <returns>True if successful</returns>
private bool PutFragsConcurrently(FragmentationInfo fragInfo,
byte[] infoKey, int ttl, IList<FingerprintedData> fragments)
{
bool ret;
//prepare the global state
int max_enqueues = 1; //we only need a true/false answer
BlockingQueue bq_result = new BlockingQueue(max_enqueues);
AsyncPutFragsGlobalState global_state =
new AsyncPutFragsGlobalState(fragments.Count, fragInfo.BaseKey, bq_result);
//@TODO tweak the number of concurrency_degree here.
int concurrency_degree = Concurrency;
global_state.Concurrency = concurrency_degree;
//Put pieces
for (int index = 0; index < fragments.Count; index++) {
FingerprintedData fpd = fragments[index];
byte[] serializedFpd = fpd.SerializeTo();
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Size after serialization {0}", serializedFpd.Length));
byte[] piece_key = BuildFragmentKey(fragInfo.BaseKey, index);
string piece_key_string = Encoding.UTF8.GetString(piece_key);
//piece state
AsyncOpState aps = new AsyncOpState(piece_key, serializedFpd, ttl);
AsyncFragsOpState apfs = new AsyncFragsOpState(global_state, aps);
//async put, one instance of IDht per put because thread safty not guaranteed
IDht proxy = DhtServiceClient.GetXmlRpcDhtClient(_svc_uri.Port);
BrunetDhtClientOperations brdht_ops = new BrunetDhtClientOperations(
proxy);
// Fire the async XML-RPC call.
lock (global_state.SyncRoot) {
brdht_ops.BeginPutWithCallback(piece_key, serializedFpd, ttl,
new AsyncCallback(this.OnDhtPutReturns), apfs);
}
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Put piece {0} to DHT began (asynchronously)",
piece_key_string));
if ((concurrency_degree > 1 && (index + 1) % concurrency_degree == 0) ||
index == fragments.Count - 1) {
// Stop to wait for batch finish or all finish
global_state.BatchFinishedEvent.WaitOne();
if (concurrency_degree > 1) {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Batch {0} finished. Moving on",
(int)((index + 1) / concurrency_degree)));
}
}
}
//block here until result comes
PutFragsStoppedEventArgs stop_args =
(PutFragsStoppedEventArgs)bq_result.Dequeue();
// Deal with info object.
if (stop_args.IsSuccessful) {
ret = _dht.Put(infoKey, fragInfo.SerializeTo(), ttl);
if (ret) {
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("FragmentationInfo {0} successfully put",
Encoding.UTF8.GetString(infoKey)));
}
} else {
ret = false;
}
return ret;
}
