public static bool IsConnectionFault(Message m)
{
MessageError et = m.Error;
// If it's a connect exception,
string exType = et.ErrorType;
if (exType.Equals("Sstem.Net.Sockets.SocketException")) {
return true;
}
if (exType.Equals("Deveel.Data.Net.ServiceNotConnectedException")) {
return true;
}
return false;
}
public void SetPathRoot(IServiceAddress root, String pathName, DataAddress address)
{
InspectNetwork();
// Check machine is in the schema,
MachineProfile machineP = CheckMachineInNetwork(root);
// Check it's root,
if (!machineP.IsRoot)
throw new NetworkAdminException("Machine '" + root + "' is not a root");
// Perform the command,
Message message = new Message("publishPath", pathName, address);
Message m = Command(root, ServiceType.Root, message.AsStream());
if (m.HasError) {
throw new NetworkAdminException(m.ErrorMessage);
}
}
private static string GetErrorMessage(Message message)
{
MessageError error = GetError(message);
return (error == null ? null : error.Message);
}
private void SerializeMessage(Message message, BinaryWriter writer)
{
string messageName = message.Name;
writer.Write(messageName);
int sz = message.Arguments.Count;
writer.Write(sz);
foreach (MessageArgument argument in message.Arguments) {
WriteArgument(argument, writer);
}
writer.Write(8);
}
private void RegisterManagerServers(IServiceAddress[] managerServerAddresses)
{
// Sanity check on number of manager servers (10 should be enough for
// everyone !)
if (managerServerAddresses.Length > 100)
throw new ApplicationException("Number of manager servers > 100");
// Query all the manager servers on the network and generate a unique id
// for this manager, if we need to create a new unique id,
if (managerUniqueId == -1) {
int sz = managerServerAddresses.Length;
List<int> blacklistId = new List<int>(sz);
for (int i = 0; i < sz; ++i) {
IServiceAddress man = managerServerAddresses[i];
if (!man.Equals(address)) {
// Open a connection with the manager server,
IMessageProcessor processor = connector.Connect(man, ServiceType.Manager);
// Query the unique id of the manager server,
Message message = new Message("getUniqueId");
IEnumerable<Message> response = processor.Process(message.AsStream());
foreach (Message m in response) {
if (m.HasError)
throw new ApplicationException(m.ErrorMessage);
long uniqueId = (long) m.Arguments[0].Value;
if (uniqueId == -1)
throw new ApplicationException("getUniqueId = -1");
// Add this to blacklist,
blacklistId.Add((int) uniqueId);
}
}
}
// Find a random id not found in the blacklist,
int genId;
while (true) {
genId = rng.Next(200);
if (!blacklistId.Contains(genId)) {
break;
}
}
// Set the unique id,
managerUniqueId = genId;
}
lock (managerServersList) {
managerServersList.Clear();
managerDb.ClearAllMachines();
foreach (IServiceAddress m in managerServerAddresses) {
if (!m.Equals(address)) {
ManagerServiceInfo managerServer = new ManagerServiceInfo(m);
managerServersList.Add(managerServer);
// Add to the manager database
managerDb.AddMachine(managerServer.Address);
}
}
PersistManagerServers(managerServersList);
PersistManagerUniqueId(managerUniqueId);
}
// Perform initialization on the manager
managerDb.Initialize();
// Wait for initialization to complete,
managerDb.WaitInitComplete();
// Add a manager server entry,
foreach (IServiceAddress managerAddr in managerServerAddresses) {
managerDb.SetValue("ms." + managerAddr, "");
}
// Tell all the root servers of the new manager set,
List<IServiceAddress> rootServersSet = new List<IServiceAddress>(64);
lock (rootServersList) {
foreach (RootServiceInfo rs in rootServersList) {
rootServersSet.Add(rs.Address);
}
}
foreach (IServiceAddress r in rootServersSet) {
InformRootServerOfManagers(r);
}
}
private void NotifyBlockServerOfMaxBlockId(IServiceAddress blockServer, BlockId blockId)
{
if (serviceTracker.IsServiceUp(blockServer, ServiceType.Block)) {
Message message = new Message("notifyCurrentBlockId", blockId);
// Connect to the block server,
IMessageProcessor processor = connector.Connect(blockServer, ServiceType.Block);
IEnumerable<Message> response = processor.Process(message.AsStream());
// If the block server is down, report it to the tracker,
foreach (Message m in response) {
if (m.HasError) {
if (ReplicatedValueStore.IsConnectionFault(m)) {
serviceTracker.ReportServiceDownClientReport(blockServer, ServiceType.Block);
}
}
}
}
}
private void ClearRootServerOfManagers(IServiceAddress rootServer)
{
Message message = new Message("clearOfManagers");
// Open a connection to the root server,
IMessageProcessor processor = connector.Connect(rootServer, ServiceType.Root);
IEnumerable<Message> response = processor.Process(message.AsStream());
foreach (Message m in response) {
if (m.HasError) {
// If we failed, log a severe error but don't stop trying to register
Logger.Error("Couldn't inform root server of managers");
Logger.Error(m.ErrorStackTrace);
if (ReplicatedValueStore.IsConnectionFault(m)) {
serviceTracker.ReportServiceDownClientReport(rootServer, ServiceType.Root);
}
}
}
}
public void AddBlockAssociation(long blockId, long serverGuid)
{
InspectNetwork();
// Get the current manager server,
MachineProfile[] mans = GetManagerServers();
if (mans.Length == 0)
throw new NetworkAdminException("No manager server found");
IServiceAddress[] managerServers = new IServiceAddress[mans.Length];
for (int i = 0; i < mans.Length; ++i) {
managerServers[i] = mans[i].ServiceAddress;
}
// NOTE: This command will be propogated through all the other managers on
// the network by the manager.
Message message = new Message("internalAddBlockServerMapping", blockId, new long[] {serverGuid});
// Send the command to all the managers, if all fail throw an exception.
bool success = false;
Message lastError = null;
for (int i = 0; i < managerServers.Length; ++i) {
Message m = Command(managerServers[i], ServiceType.Manager, message.AsStream());
if (m.HasError)
lastError = m;
else
success = true;
}
if (!success) {
throw new NetworkAdminException(lastError.ErrorMessage);
}
}
private object SendManagerFunction(string functionName, params object[] args)
{
// Send the add path command to the first available manager server.
MachineProfile[] managerServers = GetManagerServers();
Message message = new Message(functionName, args);
// The first manager that takes the command,
Object result = null;
Message lastError = null;
for (int i = 0; i < managerServers.Length && result == null; ++i) {
IServiceAddress managerServer = managerServers[i].ServiceAddress;
Message m = Command(managerServer, ServiceType.Manager, message.AsStream());
if (m.HasError) {
if (!IsConnectionFailure(m)) {
throw new NetworkAdminException(m.ErrorMessage);
}
lastError = m;
} else {
return m.Arguments[0].Value;
}
}
// All managers failed,
throw new NetworkAdminException(lastError.ErrorMessage);
}
private void SendAllRootServers(IServiceAddress[] roots, string functionName, params object[] args)
{
Message message = new Message(functionName, args);
// Send the command to all the root servers,
Message lastError = null;
IEnumerable<Message>[] responses = new IEnumerable<Message>[roots.Length];
for (int i = 0; i < roots.Length; ++i) {
IServiceAddress rootServer = roots[i];
IMessageProcessor proc = Connector.Connect(rootServer, ServiceType.Root);
responses[i] = proc.Process(message.AsStream());
}
int successCount = 0;
foreach (MessageStream response in responses) {
foreach (Message m in response) {
if (m.HasError) {
if (!IsConnectionFailure(m))
throw new NetworkAdminException(m.ErrorMessage);
lastError = m;
} else {
++successCount;
}
}
}
// Any one root failed,
if (successCount != roots.Length) {
throw new NetworkAdminException(lastError.ErrorMessage);
}
}
private void SendManagerCommand(string functionName, params object[] args)
{
// Send the add path command to the first available manager server.
MachineProfile[] managerServers = GetManagerServers();
Message message = new Message(functionName, args);
// The first manager that takes the command,
bool success = false;
Message lastError = null;
for (int i = 0; i < managerServers.Length && success == false; ++i) {
IServiceAddress managerServer = managerServers[i].ServiceAddress;
Message m = Command(managerServer, ServiceType.Manager, message.AsStream());
if (m.HasError) {
if (!IsConnectionFailure(m)) {
throw new NetworkAdminException(m.ErrorMessage);
}
lastError = m;
} else {
success = true;
}
}
// All managers failed,
if (!success) {
throw new NetworkAdminException(lastError.ErrorMessage);
}
}
private List<MachineProfile> InspectNetwork()
{
// If cached,
if (machineProfiles != null) {
return machineProfiles;
}
// The sorted list of all servers in the schema,
IEnumerable<IServiceAddress> slist = SortedServers;
// The list of machine profiles,
List<MachineProfile> machines = new List<MachineProfile>();
// For each machine in the network,
foreach (IServiceAddress server in slist) {
MachineProfile machineProfile = new MachineProfile(server);
// Request a report from the administration role on the machine,
IMessageProcessor mp = Connector.Connect(server, ServiceType.Admin);
Message message = new Message("report");
IEnumerable<Message> response = mp.Process(message.AsStream());
Message lastM = null;
foreach (Message m in response) {
lastM = m;
}
if (lastM.HasError) {
machineProfile.ErrorMessage = lastM.ErrorMessage;
} else {
// Get the message replies,
MachineRoles roles = (MachineRoles)(byte) lastM.Arguments[0].Value;
long usedMem = (long) lastM.Arguments[1].Value;
long totalMem = (long) lastM.Arguments[2].Value;
long usedDisk = (long) lastM.Arguments[3].Value;
long totalDisk = (long) lastM.Arguments[4].Value;
// Populate the lists,
machineProfile.Roles = roles;
machineProfile.MemoryUsed = usedMem;
machineProfile.MemoryTotal = totalMem;
machineProfile.DiskUsed = usedDisk;
machineProfile.DiskTotal = totalDisk;
}
// Add the machine profile to the list
machines.Add(machineProfile);
}
machineProfiles = machines;
return machineProfiles;
}
private void ChangeRole(MachineProfile machine, string status, ServiceType roleType)
{
Message message = new Message(status);
message.Arguments.Add((byte)roleType);
Message m = Command(machine.ServiceAddress, ServiceType.Admin, message.AsStream());
if (m.HasError) {
throw new NetworkAdminException(m.ErrorMessage);
}
// Success,
// Update the network profile,
if (roleType == ServiceType.Manager && status.Equals("start")) {
machine.Roles |= MachineRoles.Manager;
} else if (roleType == ServiceType.Root && status.Equals("start")) {
machine.Roles |= MachineRoles.Root;
} else if (roleType == ServiceType.Block && status.Equals("start")) {
machine.Roles |= MachineRoles.Block;
}
}
private static bool IsConnectionFailure(Message m)
{
MessageError et = m.Error;
// If it's a connect exception,
string exType = et.ErrorType;
if (exType.Equals("System.Net.Sockets.SocketException"))
return true;
if (exType.Equals("Deveel.Data.Net.ServiceNotConnectedException"))
return true;
return false;
}
private void FetchNextBlock()
{
Message message = new Message("internalFetchLogBundle", firstUid, initial ? 1 : 0);
// Clear the log entries,
logEntries.Clear();
index = 0;
// Send the open stream command.
// If the service is up,
if (valueStore.tracker.IsServiceUp(machine, ServiceType.Manager)) {
// Send to the service,
IMessageProcessor processor = valueStore.connector.Connect(machine, ServiceType.Manager);
IEnumerable<Message> response = processor.Process(message.AsStream());
// If it's a connection error, return null,
foreach (Message m in response) {
if (m.HasError) {
// Report the service down if connection failure
if (IsConnectionFault(m)) {
valueStore.tracker.ReportServiceDownClientReport(machine, ServiceType.Manager);
}
throw new ApplicationException(m.ErrorMessage);
} else {
long[] uid = (long[]) m.Arguments[0].Value;
byte[] buf = (byte[]) m.Arguments[1].Value;
logEntries.Add(new LogEntry(uid, buf));
}
}
} else {
throw new ApplicationException("Service down");
}
// Update the first uid of the next block,
if (logEntries.Count > 0) {
LogEntry lastEntry = logEntries[logEntries.Count - 1];
firstUid = lastEntry.Uid;
}
}
private void SendRootServer(IServiceAddress root, String functionName, params object[] args)
{
Message message = new Message(functionName, args);
// Send the command to all the root servers,
Message lastError = null;
IMessageProcessor proc = Connector.Connect(root, ServiceType.Root);
IEnumerable<Message> response = proc.Process(message.AsStream());
int successCount = 0;
foreach (Message m in response) {
if (m.HasError) {
if (!IsConnectionFailure(m)) {
throw new NetworkAdminException(m.ErrorMessage);
}
lastError = m;
} else {
++successCount;
}
}
// Any one root failed,
if (successCount != 1) {
throw new NetworkAdminException(lastError.ErrorMessage);
}
}
public void Process(Message m, MessageStream replyMessage)
{
String cmd = m.Name;
if (cmd.Equals("internalKVProposal")) {
long[] uid = (long[]) m.Arguments[0].Value;
String key = (String) m.Arguments[1].Value;
String value = (String) m.Arguments[2].Value;
InternalKvProposal(uid, key, value);
replyMessage.AddMessage(new Message(1));
} else if (cmd.Equals("internalKVComplete")) {
long[] uid = (long[]) m.Arguments[0].Value;
String key = (String) m.Arguments[1].Value;
String value = (String) m.Arguments[2].Value;
InternalKvComplete(uid, key, value);
replyMessage.AddMessage(new Message(1));
} else if (cmd.Equals("internalBSProposal")) {
long[] uid = (long[]) m.Arguments[0].Value;
BlockId blockId = (BlockId) m.Arguments[1].Value;
long[] serverUids = (long[]) m.Arguments[2].Value;
InternalBsProposal(uid, blockId, serverUids);
replyMessage.AddMessage(new Message(1));
} else if (cmd.Equals("internalBSComplete")) {
long[] uid = (long[]) m.Arguments[0].Value;
BlockId blockId = (BlockId) m.Arguments[1].Value;
long[] serverUids = (long[]) m.Arguments[2].Value;
InternalBsComplete(uid, blockId, serverUids);
replyMessage.AddMessage(new Message(1));
} else if (cmd.Equals("internalFetchLogBundle")) {
long[] uid = (long[]) m.Arguments[0].Value;
bool initial = ((int) m.Arguments[1].Value) != 0;
InternalFetchLogBundle(replyMessage, uid, initial);
} else if (cmd.Equals("debugString")) {
StringWriter strOut = new StringWriter();
DebugOutput(strOut);
strOut.Flush();
replyMessage.AddMessage(new Message(strOut.ToString()));
} else {
throw new ApplicationException("Unknown command: " + m.Name);
}
}
private void ReportBlockIdCorruption(IServiceAddress blockServer, BlockId blockId, String failType)
{
// Report the failure,
log.Warning(String.Format("Reporting a data failure (type = {0}) for block {1} at block server {2}",
failType, blockId, blockServer));
// Failure throttling,
lock (failureFloodControlBidc) {
DateTime currentTime = DateTime.Now;
DateTime lastAddressFailTime;
if (failureFloodControlBidc.TryGetValue(blockServer, out lastAddressFailTime) &&
lastAddressFailTime.AddMilliseconds((10*1000)) > currentTime) {
// We don't respond to failure notifications on the same address if a
// failure notice arrived within a minute of the last one accepted.
return;
}
failureFloodControlBidc[blockServer] = currentTime;
}
Message message = new Message("notifyBlockIdCorruption", blockServer, blockId, failType);
// Process the failure report message on the manager server,
// (Ignore any error message generated)
ProcessManager(message.AsStream());
}
public IEnumerable<Message> Process(IEnumerable<Message> stream)
{
// The reply message,
MessageStream replyMessage = new MessageStream();
// The messages in the stream,
foreach (Message m in stream) {
try {
// Check the server isn't in a stop state,
service.CheckErrorState();
String cmd = m.Name;
// getServerList(BlockId)
if (cmd.Equals("getServerList")) {
BlockServiceInfo[] servers = GetServerList((BlockId) m.Arguments[0].Value);
Message response = new Message();
response.Arguments.Add(servers.Length);
for (int i = 0; i < servers.Length; ++i) {
response.Arguments.Add(servers[i].Address);
response.Arguments.Add(service.serviceTracker.GetServiceCurrentStatus(servers[i].Address, ServiceType.Block));
}
replyMessage.AddMessage(response);
}
// allocateNode(int node_size)
else if (cmd.Equals("allocateNode")) {
DataAddress address = AllocateNode((int) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(address));
}
// registerBlockServer(ServiceAddress service_address)
else if (cmd.Equals("registerBlockServer")) {
service.RegisterBlockServer((IServiceAddress) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// deregisterBlockServer(IServiceAddress)
else if (cmd.Equals("deregisterBlockServer")) {
service.DeregisterBlockServer((IServiceAddress) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// deregisterAllBlockServers()
else if (cmd.Equals("deregisterAllBlockServers")) {
service.DeregisterAllBlockServers();
replyMessage.AddMessage(new Message(1));
}
// registerManagerServers(ServiceAddress[] managers)
else if (cmd.Equals("registerManagerServers")) {
service.RegisterManagerServers((IServiceAddress[]) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// deregisterAllManagerServers()
else if (cmd.Equals("deregisterManagerServer")) {
service.DeregisterManagerServer((IServiceAddress) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// addPathToNetwork(string, string, IServiceAddress, IServiceAddress[])
else if (cmd.Equals("addPathToNetwork")) {
service.AddPathToNetwork((string) m.Arguments[0].Value, (string) m.Arguments[1].Value,
(IServiceAddress) m.Arguments[2].Value, (IServiceAddress[]) m.Arguments[3].Value);
replyMessage.AddMessage(new Message(1));
}
// removePathFromNetwork(String path_name)
else if (cmd.Equals("removePathFromNetwork")) {
service.RemovePathFromNetwork((string) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// addBlockServerMapping(BlockId, long[])
else if (cmd.Equals("internalAddBlockServerMapping")) {
service.InternalAddBlockServerMapping((BlockId) m.Arguments[0].Value, (long[]) m.Arguments[1].Value);
replyMessage.AddMessage(new Message(1));
}
// removeBlockServerMapping(BlockId, long[])
else if (cmd.Equals("internalRemoveBlockServerMapping")) {
service.InternalRemoveBlockServerMapping((BlockId) m.Arguments[0].Value, (long[]) m.Arguments[1].Value);
replyMessage.AddMessage(new Message(1));
}
// --- Path processors ---
// registerRootServer(IServiceAddress)
else if (cmd.Equals("registerRootServer")) {
service.RegisterRootServer((IServiceAddress) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// deregisterRootServer(IServiceAddress)
else if (cmd.Equals("deregisterRootServer")) {
service.DeregisterRootServer((IServiceAddress) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// deregisterAllConsensusProcessors()
else if (cmd.Equals("deregisterAllRootServers")) {
service.DeregisterAllRootServers();
replyMessage.AddMessage(new Message(1));
}
// PathInfo getPathInfoForPath(string)
else if (cmd.Equals("getPathInfoForPath")) {
PathInfo pathInfo = service.GetPathInfoForPath((String) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(pathInfo));
}
// string[] getAllPaths()
else if (cmd.Equals("getAllPaths")) {
string[] pathSet = service.GetAllPaths();
replyMessage.AddMessage(new Message(new object[] {pathSet}));
}
// getRegisteredServerList()
else if (cmd.Equals("getRegisteredServerList")) {
GetRegisteredServerList(replyMessage);
}
// getRegisteredBlockServers()
else if (cmd.Equals("getRegisteredBlockServers")) {
GetRegisteredBlockServers(replyMessage);
}
// getRegisteredRootServers()
else if (cmd.Equals("getRegisteredRootServers")) {
GetRegisteredRootServers(replyMessage);
}
// notifyBlockServerFailure(IServiceAddress)
else if (cmd.Equals("notifyBlockServerFailure")) {
service.NotifyBlockServerFailure((IServiceAddress) m.Arguments[0].Value);
replyMessage.AddMessage(new Message(1));
}
// notifyBlockIdCorruption(IServiceAddress, BlockId, string)
else if (cmd.Equals("notifyBlockIdCorruption")) {
service.NotifyBlockIdCorruption((IServiceAddress) m.Arguments[0].Value, (BlockId) m.Arguments[1].Value,
(string) m.Arguments[2].Value);
replyMessage.AddMessage(new Message(1));
}
// getUniqueId()
else if (cmd.Equals("getUniqueId")) {
long uniqueId = service.managerUniqueId;
replyMessage.AddMessage(new Message(uniqueId));
}
// poll(String)
else if (m.Name.Equals("poll")) {
service.managerDb.CheckConnected();
replyMessage.AddMessage(new Message(1));
} else {
// Defer to the manager db process command,
service.managerDb.Process(m, replyMessage);
}
} catch (OutOfMemoryException e) {
service.Logger.Error("Memory Error", e);
service.SetErrorState(e);
throw;
} catch (Exception e) {
service.Logger.Error("Exception during process", e);
replyMessage.AddMessage(new Message(new MessageError(e)));
}
}
return replyMessage;
}
private void ReportBlockServerFailure(IServiceAddress address)
{
// Report the failure,
log.Warning(String.Format("Reporting failure for {0} to manager server", address));
// Failure throttling,
lock (failureFloodControl) {
DateTime currentTime = DateTime.Now;
DateTime lastAddressFailTime;
if (failureFloodControl.TryGetValue(address, out lastAddressFailTime) &&
lastAddressFailTime.AddMilliseconds((30*1000)) > currentTime) {
// We don't respond to failure notifications on the same address if a
// failure notice arrived within a minute of the last one accepted.
return;
}
failureFloodControl[address] = currentTime;
}
Message message = new Message("notifyBlockServerFailure", address);
// Process the failure report message on the manager server,
NotifyAllManagers(message.AsStream());
}
private void InformRootServerOfManagers(IServiceAddress rootServer)
{
// Make the managers list
List<IServiceAddress> managers = new List<IServiceAddress>(64);
lock (managerServersList) {
foreach (ManagerServiceInfo m in managerServersList) {
managers.Add(m.Address);
}
}
//TODO: verfy this ...
// add the current manager address to the list
managers.Add(address);
IServiceAddress[] managersSet = managers.ToArray();
Message message = new Message("informOfManagers", new object[] {managersSet});
// Open a connection to the root server,
IMessageProcessor processor = connector.Connect(rootServer, ServiceType.Root);
IEnumerable<Message> response = processor.Process(message.AsStream());
foreach (Message m in response) {
if (m.HasError) {
// If we failed, log a severe error but don't stop trying to register
Logger.Error("Couldn't inform root server of managers");
Logger.Error(m.ErrorStackTrace);
if (ReplicatedValueStore.IsConnectionFault(m)) {
serviceTracker.ReportServiceDownClientReport(rootServer, ServiceType.Root);
}
}
}
}
private static bool IsConnectionFailMessage(Message m)
{
// TODO: This should detect comm failure rather than catch-all.
if (m.HasError) {
MessageError error = m.Error;
string source = error.Source;
// If it's a connect exception,
if (source.Equals("System.Net.Sockets.SocketException"))
return true;
if (source.Equals("Deveel.Data.Net.ServiceNotConnectedException"))
return true;
}
return false;
}
private void RegisterBlockServer(IServiceAddress blockServerAddress)
{
// Get the block server uid,
Message message = new Message("serverGUID");
// Connect to the block server,
IMessageProcessor processor = connector.Connect(blockServerAddress, ServiceType.Block);
IEnumerable<Message> response = processor.Process(message.AsStream());
Message rm = null;
foreach (Message m in response) {
if (m.HasError)
throw new ApplicationException(m.ErrorMessage);
rm = m;
}
long serverGuid = (long) rm.Arguments[0].Value;
// Add lookup for this server_guid <-> service address to the db,
managerDb.SetValue("block.sguid." + serverGuid, blockServerAddress.ToString());
managerDb.SetValue("block.addr." + blockServerAddress, serverGuid.ToString());
// TODO: Block discovery on the introduced machine,
// Set the status and guid
BlockServiceInfo blockServer = new BlockServiceInfo(serverGuid, blockServerAddress);
// Add it to the map
lock (blockServersMap) {
blockServersMap[serverGuid] = blockServer;
blockServersList.Add(blockServer);
PersistBlockServers(blockServersList);
}
}
private DataAddress[] InternalGetPathHistorical(PathInfo pathInfo, IServiceAddress server,
long timeStart, long timeEnd)
{
Message message = new Message("getPathHistorical", pathInfo.PathName, pathInfo.VersionNumber, timeStart, timeEnd);
Message m = ProcessSingleRoot(message.AsStream(), server);
if (m.HasError)
throw new ApplicationException(m.ErrorMessage);
return (DataAddress[]) m.Arguments[0].Value;
}
private Message DeserializeMessage(BinaryReader reader)
{
string messageName = reader.ReadString();
Message message = new Message(messageName);
int sz = reader.ReadInt32();
for (int i = 0; i < sz; i++)
message.Arguments.Add(ReadArgument(reader));
int v = reader.ReadInt32();
if (v != 8)
throw new FormatException();
return message;
}
private void SendProposalComplete(List<ServiceMessageQueue> pendingQueue, long[] uid, BlockId blockId, long[] blockServerUids)
{
List<IServiceAddress> machines = new List<IServiceAddress>(17);
lock (cluster) {
machines.AddRange(cluster);
}
// Create the message,
Message message = new Message("internalBSComplete", uid, blockId, blockServerUids);
// Send the complete proposal message out to the machines on the network,
SendCommand(pendingQueue, machines, message.AsStream());
// Enqueue all pending messages,
foreach (ServiceMessageQueue queue in pendingQueue) {
queue.Enqueue();
}
}
private static MessageError GetError(Message message)
{
foreach (var argument in message.Arguments) {
if (argument.Value is MessageError)
return (argument.Value as MessageError);
}
return null;
}
private int SendProposalToNetwork(List<ServiceMessageQueue> pendingQueue, long[] uid, BlockId blockId, long[] blockServerUids)
{
List<IServiceAddress> machines = new List<IServiceAddress>(17);
lock (cluster) {
machines.AddRange(cluster);
}
// Create the message,
Message message = new Message("internalBSProposal", uid, blockId, blockServerUids);
// Send the proposal command out to the machines on the network,
int sendCount = SendCommand(pendingQueue, machines, message.AsStream());
// If we sent to a majority, return 1
if (sendCount > machines.Count/2)
return 1;
// Otherwise return 2, (majority of machines in the cluster not available).
return 2;
}
private static string GetErrorStackTrace(Message message)
{
MessageError error = GetError(message);
return (error == null ? null : error.StackTrace);
}
public void RegisterService(IServiceAddress address, ServiceType serviceType)
{
InspectNetwork();
// Check machine is in the schema,
MachineProfile machineP = CheckMachineInNetwork(address);
MachineProfile[] currentManagers = GetManagerServers();
if (currentManagers.Length == 0)
throw new NetworkAdminException("No manager server found");
// Check it is a root server,
if (!machineP.IsInRole(serviceType))
throw new NetworkAdminException("Machine '" + address + "' is assigned as a " + serviceType);
string command = null;
if (serviceType == ServiceType.Manager) {
RegisterManager(address);
} else if (serviceType == ServiceType.Root) {
command = "registerRootServer";
} else if (serviceType == ServiceType.Block) {
command = "registerBlockServer";
} else {
throw new ArgumentException();
}
Message message = new Message(command, address);
// Register the root server with all the managers currently on the network,
for (int i = 0; i < currentManagers.Length; ++i) {
Message m = Command(currentManagers[i].ServiceAddress, ServiceType.Manager, message.AsStream());
if (m.HasError)
throw new NetworkAdminException(m.ErrorMessage);
}
}