/// <summary>
/// Initializes the current instance with a contained <see cref="RelayNode"/>
/// </summary>
/// <param name="dataHandler">The data handler.</param>
/// <param name="relayNode">The relay node.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="dataHandler"/> is null
/// or when <paramref name="relayNode"/> is null.</exception>
public SocketServerRelayMessageHandler(IDataHandler dataHandler, IRelayNode relayNode)
{
if (dataHandler == null) throw new ArgumentNullException("dataHandler");
if (relayNode == null) throw new ArgumentNullException("relayNode");
_dataHandler = dataHandler;
_relayNode = relayNode;
}
/// <summary>
/// Starts the server and loads the <see cref="IRelayNode"/> instance's assembly.
/// </summary>
/// <param name="runStates">State information to start the instance with.</param>
/// <exception cref="Exception">Thrown when an error occurs, caller should call <see cref="Stop"/> in this cass.</exception>
public void Start(ComponentRunState[] runStates)
{
bool setDllDirectorySuccess = SetDllDirectory(assemblyPath);
if (setDllDirectorySuccess)
{
if (log.IsInfoEnabled)
{
log.InfoFormat("Set DllDirectory to {0}. Unmanaged dlls will be imported from this folder.", assemblyPath);
}
}
else
{
if (log.IsErrorEnabled)
{
log.ErrorFormat("Failed to set DllDirectory to {0}. Components that rely on unmanaged DLLs will not work.", assemblyPath);
}
}
if (log.IsInfoEnabled)
{
log.Info("Getting new node.");
}
//enable this manually after the server is up an running because on server startup
//code that modifies the directory will cause the domain to reload.
AssemblyLoader.Instance.EnableRaisingEvents = false;
relayNode = AssemblyLoader.Instance.GetRelayNode(nodeChangedDelegate);
if (relayNode != null)
{
if (log.IsInfoEnabled)
{
log.Info("New node created.");
log.Info("Initializing Relay Node Instance");
}
relayNode.Initialize(runStates);
if (log.IsInfoEnabled)
{
log.Info("Relay Node Initialized, Starting");
}
relayNode.Start();
if (log.IsInfoEnabled)
{
log.Info("Relay Node Started");
}
AssemblyLoader.Instance.EnableRaisingEvents = true;
}
else
{
if (log.IsErrorEnabled)
{
log.Error("Error starting Relay Server: No Relay Node implemenation found!");
}
}
}
/// <summary>
/// Initializes the current instance with a contained <see cref="RelayNode"/>
/// </summary>
/// <param name="dataHandler">The data handler.</param>
/// <param name="relayNode">The relay node.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="dataHandler"/> is null
/// or when <paramref name="relayNode"/> is null.</exception>
public SocketServerRelayMessageHandler(IDataHandler dataHandler, IRelayNode relayNode)
{
if (dataHandler == null)
{
throw new ArgumentNullException("dataHandler");
}
if (relayNode == null)
{
throw new ArgumentNullException("relayNode");
}
_dataHandler = dataHandler;
_relayNode = relayNode;
}
/// <summary>
/// Stops the server, reloads the assembly and restarts the server.
/// </summary>
public void AssemblyChanged() //should rename to ReloadAssembly
{
try
{
//preserve state information between assembly reloads
ComponentRunState[] runStates = GetRunState();
Stop();
Start(runStates);
}
catch (Exception ex)
{
if (log.IsErrorEnabled)
{
log.Error("Exception recycling Relay Node Domain: " + ex.ToString() + Environment.NewLine + "Trying again with no runstate.");
}
relayNode = AssemblyLoader.Instance.GetRelayNode(nodeChangedDelegate);
relayNode.Initialize(null);
relayNode.Start();
}
}
/// <summary>
/// Stops the server and unloads the <see cref="IRelayNode"/> instance's assembly.
/// </summary>
/// <exception cref="Exception">Thrown when an error occurs.</exception>
public void Stop()
{
if (relayNode != null)
{
try
{
if (log.IsInfoEnabled)
{
log.Info("Stopping Relay Node.");
}
relayNode.Stop();
if (log.IsInfoEnabled)
{
log.Info("Relay Node Stopped.");
log.Info("Releasing old domain.");
}
AssemblyLoader.Instance.ReleaseRelayNode();
if (log.IsInfoEnabled)
{
log.Info("Old domain released.");
}
relayNode = null;
}
catch (Exception ex)
{
if (log.IsErrorEnabled)
{
log.ErrorFormat("Error shutting down relay node: {0}", ex);
}
}
}
else
{
if (log.IsErrorEnabled)
{
log.Error("No Node To Stop.");
}
}
}
/// <summary>
/// Starts the server and loads the <see cref="IRelayNode"/> instance's assembly.
/// </summary>
/// <param name="runStates">State information to start the instance with.</param>
/// <exception cref="Exception">Thrown when an error occurs, caller should call <see cref="Stop"/> in this cass.</exception>
public void Start(ComponentRunState[] runStates)
{
bool setDllDirectorySuccess = SetDllDirectory(assemblyPath);
if (setDllDirectorySuccess)
{
if (log.IsInfoEnabled)
log.InfoFormat("Set DllDirectory to {0}. Unmanaged dlls will be imported from this folder.", assemblyPath);
}
else
{
if (log.IsErrorEnabled)
log.ErrorFormat("Failed to set DllDirectory to {0}. Components that rely on unmanaged DLLs will not work.", assemblyPath);
}
if (log.IsInfoEnabled)
log.Info("Getting new node.");
//enable this manually after the server is up an running because on server startup
//code that modifies the directory will cause the domain to reload.
AssemblyLoader.Instance.EnableRaisingEvents = false;
relayNode = AssemblyLoader.Instance.GetRelayNode(nodeChangedDelegate);
if (relayNode != null)
{
if (log.IsInfoEnabled)
{
log.Info("New node created.");
log.Info("Initializing Relay Node Instance");
}
relayNode.Initialize(runStates);
if (log.IsInfoEnabled)
log.Info("Relay Node Initialized, Starting");
relayNode.Start();
if (log.IsInfoEnabled)
log.Info("Relay Node Started");
AssemblyLoader.Instance.EnableRaisingEvents = true;
}
else
{
if (log.IsErrorEnabled)
log.Error("Error starting Relay Server: No Relay Node implemenation found!");
}
}
/// <summary>
/// Stops the server, reloads the assembly and restarts the server.
/// </summary>
public void AssemblyChanged() //should rename to ReloadAssembly
{
try
{
//preserve state information between assembly reloads
ComponentRunState[] runStates = GetRunState();
Stop();
Start(runStates);
}
catch (Exception ex)
{
if (log.IsErrorEnabled)
log.Error("Exception recycling Relay Node Domain: " + ex.ToString() + Environment.NewLine + "Trying again with no runstate.");
relayNode = AssemblyLoader.Instance.GetRelayNode(nodeChangedDelegate);
relayNode.Initialize(null);
relayNode.Start();
}
}
/// <summary>
/// Stops the server and unloads the <see cref="IRelayNode"/> instance's assembly.
/// </summary>
/// <exception cref="Exception">Thrown when an error occurs.</exception>
public void Stop()
{
if (relayNode != null)
{
try
{
if (log.IsInfoEnabled)
log.Info("Stopping Relay Node.");
relayNode.Stop();
if (log.IsInfoEnabled)
{
log.Info("Relay Node Stopped.");
log.Info("Releasing old domain.");
}
AssemblyLoader.Instance.ReleaseRelayNode();
if (log.IsInfoEnabled)
log.Info("Old domain released.");
relayNode = null;
}
catch (Exception ex)
{
if (log.IsErrorEnabled)
log.ErrorFormat("Error shutting down relay node: {0}", ex);
}
}
else
{
if (log.IsErrorEnabled)
log.Error("No Node To Stop.");
}
}
