public GNode(RemoteEndPoint managerEP, OwnEndPoint ownEP, SecurityCredentials credentials, string remoteObjectPrefix)
{
_OwnEP = ownEP;
_Credentials = credentials;
_ManagerEP = managerEP;
_RemoteObjPrefix = remoteObjectPrefix;
Init();
}
public static GNode GetRemoteRef(RemoteEndPoint remoteEP, string remoteObjectPrefix)
{
switch (remoteEP.RemotingMechanism)
{
case RemotingMechanism.TcpBinary:
string uri = "tcp://" + remoteEP.Host + ":" + remoteEP.Port + "/" + remoteObjectPrefix;
return((GNode)Activator.GetObject(typeof(GNode), uri));
default:
return(null);
}
}
//-----------------------------------------------------------------------------------------------
// public methods
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Initialised the remoted "node"
/// </summary>
protected void Init()
{
if (_Initted)
{
return;
}
if (_Connection != null)
{
_Credentials = new SecurityCredentials(_Connection.Username, _Connection.Password);
_ManagerEP = new RemoteEndPoint(_Connection.Host, _Connection.Port, RemotingMechanism.TcpBinary);
}
GetManagerRef();
RemoteSelf();
_Initted = true;
}
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Gets the reference to a remote manager
/// </summary>
/// <param name="remoteEP">end point of the remote manager</param>
/// <returns>Manager reference</returns>
public static IManager GetRemoteManagerRef(RemoteEndPoint remoteEP)
{
IManager manager;
try
{
manager = (IManager)GetRemoteRef(remoteEP);
manager.PingManager();
}
catch (Exception e)
{
throw new RemotingException("Could not connect to Manager.", e);
}
return(manager);
}
/// <summary>
/// Creates a new instance of the GConnection class
/// </summary>
/// <param name="managerEP">manager end point</param>
/// <param name="ownEP">own end point</param>
/// <param name="credentials"></param>
public GNode(RemoteEndPoint managerEP, OwnEndPoint ownEP, SecurityCredentials credentials) : this(managerEP, ownEP, credentials, DefaultRemoteObjectPrefix)
{
}
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Connect to an executor which is in non-dedicated mode.
/// This is called by a non-dedicated executor using its reference to this manager.
/// </summary>
/// <param name="sc">security credentials to verify if the executor has permission to perform this operation
/// (i.e connect non-dedicated, which is associated with the ExecuteThread permission)</param>
/// <param name="executorId">executor id</param>
public void Executor_ConnectNonDedicatedExecutor(SecurityCredentials sc, string executorId, RemoteEndPoint executorEP)
{
logger.Debug("Executor called: ConnectNonDedicated");
AuthenticateUser(sc);
EnsurePermission(sc, Permission.ExecuteThread);
_Executors[executorId].ConnectNonDedicated(executorEP);
logger.Debug("Connected to executor non-dedicated: "+executorId);
_Executors[executorId].HeartbeatUpdate(new HeartbeatInfo(0, 0, 0));
}
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Connect to an executor which is in dedicated mode.
/// This method is called by the remote executor using its reference to this manager.
/// </summary>
/// <param name="sc">security credentials to verify if the executor has permission to perform this operation
/// (i.e connect dedicated, which is associated with the ExecuteThread permission)</param>
/// <param name="executorId">executor id</param>
/// <param name="executorEP">end point of the executor</param>
public void Executor_ConnectDedicatedExecutor(SecurityCredentials sc, string executorId, RemoteEndPoint executorEP)
{
logger.Debug("Executor called: ConnectDedicated: Authenticate,EnsurePermission,Connect,Set DedicatedScheduler");
AuthenticateUser(sc);
EnsurePermission(sc, Permission.ExecuteThread);
try
{
_Executors[executorId].ConnectDedicated(executorEP);
InternalShared.Instance.DedicatedSchedulerActive.Set();
}
catch (ExecutorCommException ece)
{
logger.Error("Couldnt connect back to the supplied executor",ece);
throw new ConnectBackException("Couldn't connect back to the supplied Executor", ece);
}
}
public void Connect()
{
logger.Info("Connecting....");
if (ExecConnectEvent!=null){
ExecConnectEvent("Connecting....",0);
}
Executors = new GExecutor[GetNumberOfExecutors()];
for (int executorIndex = 0; executorIndex < Executors.Length; executorIndex++)
{
RemoteEndPoint rep = new RemoteEndPoint(
Config.ManagerHost,
Config.ManagerPort,
RemotingMechanism.TcpBinary
);
logger.Debug("Created remote-end-point");
if (ExecConnectEvent!=null)
{
ExecConnectEvent("Created remote-end-point",20);
}
// TODO: kind of hack-ish way of determining the port for higher thread numbers
OwnEndPoint oep = new OwnEndPoint(
Config.OwnPort + executorIndex,
RemotingMechanism.TcpBinary
);
logger.Debug("Created own-end-point");
if (ExecConnectEvent!=null)
{
ExecConnectEvent("Created own-end-point",40);
}
string executorId = Config.GetIdAtLocation(executorIndex);
// the executorId is used in the remoting URI so it MUST be initialized here
if (executorId == String.Empty)
{
executorId = Guid.NewGuid().ToString();
}
// connect to manager
Executors[executorIndex] = new GExecutor(rep, oep, executorId, Config.Dedicated, new SecurityCredentials(Config.Username, Config.Password), AppDomain.CurrentDomain.BaseDirectory);
if (ExecConnectEvent!=null)
{
ExecConnectEvent("Updating executor configuration.",80);
}
Config.ConnectVerified = true;
Config.SetIdAtLocation(executorIndex, Executors[executorIndex].Id);
Config.Dedicated = Executors[executorIndex].Dedicated;
if (ExecConnectEvent!=null)
{
ExecConnectEvent("Saved configuration.",60);
}
if (ExecConnectEvent!=null)
{
ExecConnectEvent("Connected successfully.",100);
}
Executors[executorIndex].GotDisconnected += new GotDisconnectedEventHandler(GExecutor_GotDisconnected);
Executors[executorIndex].NonDedicatedExecutingStatusChanged += new NonDedicatedExecutingStatusChangedEventHandler(GExecutor_NonDedicatedExecutingStatusChanged);
}
Config.Slz();
Config.ConnectVerified = true;
logger.Info("Connected successfully.");
}
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Gets the reference to the remote node
/// </summary>
/// <param name="remoteEP">end point of the remote node</param>
/// <returns>Node reference</returns>
public static GNode GetRemoteRef(RemoteEndPoint remoteEP)
{
return GetRemoteRef(remoteEP, DefaultRemoteObjectPrefix);
}
/// <summary>
/// Verify if the executor exists in the database and the remote endpoint host matches the database setting
/// </summary>
/// <param name="ep"></param>
/// <returns></returns>
private bool VerifyExists(RemoteEndPoint ep)
{
bool exists = false;
try
{
logger.Debug("Checking if executor :"+_Id+" exists in db");
ExecutorStorageView executorStorage = ManagerStorageFactory.ManagerStorage().GetExecutor(_Id);
bool remoteEndPointNullOrHostIsSameAsExecutor;
remoteEndPointNullOrHostIsSameAsExecutor =
ep == null || (ep != null && executorStorage.HostName == ep.Host);
if (executorStorage != null && remoteEndPointNullOrHostIsSameAsExecutor)
{
exists = true;
}
logger.Debug("Executor :" + _Id + " exists in db=" + exists);
}
catch (Exception ex)
{
logger.Error("Executor :"+_Id+ " invalid id? ",ex);
throw new InvalidExecutorException("The supplied Executor ID is invalid.", ex);
}
return exists;
}
/// <summary>
/// Connects to the executor in non-dedicated mode.
/// </summary>
public void ConnectNonDedicated(RemoteEndPoint ep)
{
logger.Debug("Trying to connect NON-Dedicated to executor: "+_Id);
if (!VerifyExists(ep))
{
logger.Debug("The supplied Executor ID does not exist.");
throw new InvalidExecutorException("The supplied Executor ID does not exist.", null);
}
//here we don't ping back, since we know non-dedicated nodes can't be pinged back.
ExecutorStorageView executorStorage = ManagerStorageFactory.ManagerStorage().GetExecutor(_Id);
executorStorage.Connected = true;
executorStorage.Dedicated = false;
// update state in db
ManagerStorageFactory.ManagerStorage().UpdateExecutor(executorStorage);
logger.Debug("Connected non-dedicated. Updated db. executor_id="+_Id);
}
public GNode(RemoteEndPoint managerEP, OwnEndPoint ownEP, SecurityCredentials credentials, string remoteObjectPrefix)
{
_OwnEP = ownEP;
_Credentials = credentials;
_ManagerEP = managerEP;
_RemoteObjPrefix = remoteObjectPrefix;
Init();
}
/// <summary>
/// Creates a new instance of the GConnection class
/// </summary>
/// <param name="managerEP">manager end point</param>
/// <param name="ownEP">own end point</param>
/// <param name="credentials"></param>
public GNode(RemoteEndPoint managerEP, OwnEndPoint ownEP, SecurityCredentials credentials)
: this(managerEP, ownEP, credentials, DefaultRemoteObjectPrefix)
{
}
//-----------------------------------------------------------------------------------------------
// public methods
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Initialised the remoted "node"
/// </summary>
protected void Init()
{
if (_Initted)
{
return;
}
if (_Connection != null)
{
_Credentials = new SecurityCredentials(_Connection.Username, _Connection.Password);
_ManagerEP = new RemoteEndPoint(_Connection.Host, _Connection.Port, RemotingMechanism.TcpBinary);
}
GetManagerRef();
RemoteSelf();
_Initted = true;
}
public static GNode GetRemoteRef(RemoteEndPoint remoteEP, string remoteObjectPrefix)
{
switch (remoteEP.RemotingMechanism)
{
case RemotingMechanism.TcpBinary:
string uri = "tcp://" + remoteEP.Host + ":" + remoteEP.Port + "/" + remoteObjectPrefix;
return (GNode) Activator.GetObject(typeof(GNode), uri);
default:
return null;
}
}
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Gets the reference to the remote node
/// </summary>
/// <param name="remoteEP">end point of the remote node</param>
/// <returns>Node reference</returns>
public static GNode GetRemoteRef(RemoteEndPoint remoteEP)
{
return(GetRemoteRef(remoteEP, DefaultRemoteObjectPrefix));
}
/// <summary>
/// Connects to the executor in dedicated mode.
/// </summary>
/// <param name="ep">end point of the executor</param>
public void ConnectDedicated(RemoteEndPoint ep)
{
logger.Debug("Trying to connect Dedicated to executor: "+_Id);
if (!VerifyExists(ep))
{
logger.Debug("The supplied Executor ID does not exist.");
throw new InvalidExecutorException("The supplied Executor ID does not exist.", null);
}
bool success = false;
IExecutor executor;
try
{
executor = (IExecutor) GNode.GetRemoteRef(ep, _Id);
executor.PingExecutor(); //connect back to executor.
success = true;
logger.Debug("Connected dedicated. Executor_id="+_Id);
ExecutorStorageView executorStorage = ManagerStorageFactory.ManagerStorage().GetExecutor(_Id);
executorStorage.Connected = success;
executorStorage.Dedicated = true;
executorStorage.HostName = ep.Host;
executorStorage.Port = ep.Port;
// update state in db (always happens even if cannnot connect back to executor
ManagerStorageFactory.ManagerStorage().UpdateExecutor(executorStorage);
logger.Debug("Updated db after ping back to executor. dedicated executor_id="+_Id + ", dedicated = true, connected = "+success);
// update hashtable
if (!_DedicatedExecutors.ContainsKey(_Id))
{
_DedicatedExecutors.Add(_Id, executor);
logger.Debug("Added to list of dedicated executors: executor_id="+_Id);
}
}
catch (Exception e)
{
logger.Error("Error connecting to exec: "+_Id,e);
throw new ExecutorCommException(_Id, e);
}
}
//-----------------------------------------------------------------------------------------------
// constructors
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Creates an instance of the GExecutor with the given end points
/// (one for itself, and one for the manager), credentials and other options.
/// </summary>
/// <param name="managerEP">Manager end point</param>
/// <param name="ownEP">Own end point</param>
/// <param name="id">executor id</param>
/// <param name="dedicated">Specifies whether the executor is dedicated</param>
/// <param name="sc">Security credentials</param>
/// <param name="baseDir">Working directory for the executor</param>
public GExecutor(RemoteEndPoint managerEP, OwnEndPoint ownEP, string id, bool dedicated, SecurityCredentials sc, string baseDir)
: base(managerEP, ownEP, sc, id)
{
//eduGRID Addition
iBot = new AIMLBot.iBOT();
//Edn of eduGRID Addition
_BaseDir = baseDir;
if (_BaseDir == "" || _BaseDir==null)
{
_BaseDir = AppDomain.CurrentDomain.BaseDirectory;
}
string datDir = Path.Combine(_BaseDir,"dat");
logger.Debug("datadir="+datDir);
if (!Directory.Exists(datDir))
{
logger.Debug("Couldnot find datadir. Creating it..."+datDir);
Directory.CreateDirectory(datDir);
}
_Dedicated = dedicated;
_Id = id;
if (_Id == "")
{
logger.Info("Registering new executor");
_Id = Manager.Executor_RegisterNewExecutor(Credentials, null, Info);
logger.Info("Successfully Registered new executor:"+_Id);
}
else
{
// update the executor data if it exists in the database or create a new one if it is not found
_Id = Manager.Executor_RegisterNewExecutor(Credentials, _Id, Info);
logger.Debug("Id is "+_Id);
}
//handle exception since we want to connect to the manager
//even if it doesnt succeed the first time.
//that is, we need to handle InvalidExecutor and ConnectBack Exceptions.
try
{
try
{
ConnectToManager();
}
catch (InvalidExecutorException)
{
logger.Info("Invalid executor! Registering new executor again...");
_Id = Manager.Executor_RegisterNewExecutor(Credentials, null, Info);
logger.Info("New ExecutorID = " + _Id);
ConnectToManager();
}
}
catch (ConnectBackException)
{
logger.Warn("Couldn't connect as dedicated executor. Reverting to non-dedicated executor. ConnectBackException");
_Dedicated = false;
ConnectToManager();
}
//for non-dedicated mode, the heart-beat thread will be started
if (_Dedicated)
{
logger.Debug("Dedicated mode: starting heart-beat thread");
StartHeartBeatThread();
}
}
//-----------------------------------------------------------------------------------------------
/// <summary>
/// Gets the reference to a remote manager
/// </summary>
/// <param name="remoteEP">end point of the remote manager</param>
/// <returns>Manager reference</returns>
public static IManager GetRemoteManagerRef(RemoteEndPoint remoteEP)
{
IManager manager;
try
{
manager = (IManager) GetRemoteRef(remoteEP);
manager.PingManager();
}
catch (Exception e)
{
throw new RemotingException("Could not connect to Manager.", e);
}
return manager;
}
