public bool TryProcess(CommandProcessorContext context, string[] args, out int exitCode)
{
var commandName = args[0].ToUpper();
var commandArgs = args.Skip(1).ToArray();
ICmdProcessor commandProcessor;
if (!_processors.TryGetValue(commandName, out commandProcessor))
{
_log.Info("Unknown command: {0}.", commandName);
if (_regCommandsProcessor != null)
_regCommandsProcessor.Execute(context, new string[0]);
exitCode = 1;
return false;
}
int exitC = 0;
var executedEvent = new AutoResetEvent(false);
ThreadPool.QueueUserWorkItem(_ =>
{
try
{
var syntaxOk = commandProcessor.Execute(context, commandArgs);
if (syntaxOk)
{
exitC = context.ExitCode;
}
else
{
exitC = 1;
_log.Info("Usage of {0}:{1}{2}", commandName, Environment.NewLine, commandProcessor.Usage);
}
executedEvent.Set();
}
catch (Exception exc)
{
_log.ErrorException(exc, "Error while executing command {0}.", commandName);
exitC = -1;
executedEvent.Set();
}
});
executedEvent.WaitOne(1000);
context.WaitForCompletion();
if (!string.IsNullOrWhiteSpace(context.Reason))
_log.Error("Error during execution of command: {0}.", context.Reason);
if (context.Error != null)
{
_log.ErrorException(context.Error, "Error during execution of command");
var details = new StringBuilder();
BuildFullException(context.Error, details);
_log.Error("Details: {0}", details.ToString());
}
exitCode = exitC == 0 ? context.ExitCode : exitC;
return true;
}
public Connection CreateTcpConnection(CommandProcessorContext context,
Action<Connection, TcpPackage> handlePackage,
Action<Connection> connectionEstablished = null,
Action<Connection, SocketError> connectionClosed = null,
bool failContextOnError = true,
IPEndPoint tcpEndPoint = null)
{
var connectionCreatedEvent = new ManualResetEventSlim(false);
Connection typedConnection = null;
var connection = _connector.ConnectTo(
Guid.NewGuid(),
tcpEndPoint ?? TcpEndpoint,
conn =>
{
// we execute callback on ThreadPool because on FreeBSD it can be called synchronously
// causing deadlock
ThreadPool.QueueUserWorkItem(_ =>
{
if (!InteractiveMode)
Log.Info("Connected to [{0}, L{1}].", conn.RemoteEndPoint, conn.LocalEndPoint);
if (connectionEstablished != null)
{
if (!connectionCreatedEvent.Wait(10000))
throw new Exception("TcpTypedConnection creation took too long!");
connectionEstablished(typedConnection);
}
});
},
(conn, error) =>
{
var message = string.Format("Connection to [{0}, L{1}] failed. Error: {2}.",
conn.RemoteEndPoint, conn.LocalEndPoint, error);
Log.Error(message);
if (connectionClosed != null)
connectionClosed(null, error);
if (failContextOnError)
context.Fail(reason: string.Format("Socket connection failed with error {0}.", error));
},
verbose: !InteractiveMode);
typedConnection = new Connection(connection, new RawMessageFormatter(_bufferManager), new LengthPrefixMessageFramer());
typedConnection.ConnectionClosed +=
(conn, error) =>
{
if (!InteractiveMode || error != SocketError.Success)
{
Log.Info("Connection [{0}, L{1}] was closed {2}",
conn.RemoteEndPoint, conn.LocalEndPoint,
error == SocketError.Success ? "cleanly." : "with error: " + error + ".");
}
if (connectionClosed != null)
connectionClosed(conn, error);
else
Log.Info("connectionClosed callback was null");
};
connectionCreatedEvent.Set();
typedConnection.ReceiveAsync(
(conn, pkg) =>
{
var package = new TcpPackage();
bool validPackage = false;
try
{
package = TcpPackage.FromArraySegment(new ArraySegment<byte>(pkg));
validPackage = true;
if (package.Command == TcpCommand.HeartbeatRequestCommand)
{
var resp = new TcpPackage(TcpCommand.HeartbeatResponseCommand, Guid.NewGuid(), null);
conn.EnqueueSend(resp.AsByteArray());
return;
}
handlePackage(conn, package);
}
catch (Exception ex)
{
Log.InfoException(ex,
"[{0}, L{1}] ERROR for {2}. Connection will be closed.",
conn.RemoteEndPoint, conn.LocalEndPoint,
validPackage ? package.Command as object : "<invalid package>");
conn.Close(ex.Message);
if (failContextOnError)
context.Fail(ex);
}
});
return typedConnection;
}
private int Execute(string[] args)
{
Log.Info("Processing command: {0}.", string.Join(" ", args));
var context = new CommandProcessorContext(this, Log, new ManualResetEventSlim(true));
int exitCode;
if (_commands.TryProcess(context, args, out exitCode))
{
Log.Info("Command exited with code {0}.", exitCode);
return exitCode;
}
return exitCode;
}
public Connection CreateTcpConnection(CommandProcessorContext context,
Action<Connection, TcpPackage> handlePackage,
Action<Connection> connectionEstablished = null,
Action<Connection, SocketError> connectionClosed = null,
bool failContextOnError = true)
{
var connectionCreatedEvent = new AutoResetEvent(false);
Connection typedConnection = null;
var connection = _connector.ConnectTo(
TcpEndpoint,
conn =>
{
Log.Info("Connected to [{0}].", conn.EffectiveEndPoint);
if (connectionEstablished != null)
{
connectionCreatedEvent.WaitOne(500);
connectionEstablished(typedConnection);
}
},
(conn, error) =>
{
var message = string.Format("Connection to [{0}] failed. Error: {1}.",
conn.EffectiveEndPoint,
error);
Log.Error(message);
if (connectionClosed != null)
connectionClosed(null, error);
if (failContextOnError)
context.Fail(reason: string.Format("Socket connection failed with error {0}.", error));
});
typedConnection = new Connection(connection, new RawMessageFormatter(_bufferManager), new LengthPrefixMessageFramer());
typedConnection.ConnectionClosed +=
(conn, error) =>
{
Log.Info("Connection [{0}] was closed {1}",
conn.EffectiveEndPoint,
error == SocketError.Success ? "cleanly." : "with error: " + error + ".");
if (connectionClosed != null)
connectionClosed(conn, error);
else
Log.Info("connectionClosed callback was null");
};
connectionCreatedEvent.Set();
typedConnection.ReceiveAsync(
(conn, pkg) =>
{
var package = new TcpPackage();
bool validPackage = false;
try
{
package = TcpPackage.FromArraySegment(new ArraySegment<byte>(pkg));
validPackage = true;
if (package.Command == TcpCommand.HeartbeatRequestCommand)
{
var resp = new TcpPackage(TcpCommand.HeartbeatResponseCommand, Guid.NewGuid(), null);
conn.EnqueueSend(resp.AsByteArray());
return;
}
handlePackage(conn, package);
}
catch (Exception ex)
{
Log.InfoException(ex,
"[{0}] ERROR for {1}. Connection will be closed.",
conn.EffectiveEndPoint,
validPackage ? package.Command as object : "<invalid package>");
conn.Close();
if (failContextOnError)
context.Fail(ex);
}
});
return typedConnection;
}
/// <summary>
/// Creates a new raw TCP connection
/// </summary>
/// <param name="context"></param>
/// <param name="handlePackage"></param>
/// <param name="connectionEstablished"></param>
/// <param name="connectionClosed"></param>
/// <param name="failContextOnError"></param>
/// <param name="tcpEndPoint"></param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public Connection CreateTcpConnection(CommandProcessorContext context,
Action <Connection, TcpPackage> handlePackage,
Action <Connection> connectionEstablished = null,
Action <Connection, SocketError> connectionClosed = null,
bool failContextOnError = true,
IPEndPoint tcpEndPoint = null)
{
var connectionCreatedEvent = new ManualResetEventSlim(false);
Connection typedConnection = null;
Action <ITcpConnection> onConnectionEstablished = conn => {
// we execute callback on ThreadPool because on FreeBSD it can be called synchronously
// causing deadlock
ThreadPool.QueueUserWorkItem(_ => {
if (!_interactiveMode)
{
_log.Information(
"TcpTypedConnection: connected to [{remoteEndPoint}, L{localEndPoint}, {connectionId:B}].",
conn.RemoteEndPoint, conn.LocalEndPoint, conn.ConnectionId);
}
if (connectionEstablished != null)
{
if (!connectionCreatedEvent.Wait(10000))
{
throw new Exception("TcpTypedConnection: creation took too long!");
}
connectionEstablished(typedConnection);
}
});
};
Action <ITcpConnection, SocketError> onConnectionFailed = (conn, error) => {
_log.Error(
"TcpTypedConnection: connection to [{remoteEndPoint}, L{localEndPoint}, {connectionId:B}] failed. Error: {e}.",
conn.RemoteEndPoint, conn.LocalEndPoint, conn.ConnectionId, error);
if (connectionClosed != null)
{
connectionClosed(null, error);
}
if (failContextOnError)
{
context.Fail(reason: string.Format("Socket connection failed with error {0}.", error));
}
};
var endpoint = tcpEndPoint ?? TcpEndpoint;
ITcpConnection connection;
if (_useSsl)
{
connection = _connector.ConnectSslTo(
Guid.NewGuid(),
endpoint.GetHost(),
endpoint.ResolveDnsToIPAddress(),
TcpConnectionManager.ConnectionTimeout,
(cert, chain, err) => (err == SslPolicyErrors.None || !_validateServer, err.ToString()),
() => null,
onConnectionEstablished,
onConnectionFailed,
verbose: !_interactiveMode);
}
else
{
connection = _connector.ConnectTo(
Guid.NewGuid(),
endpoint.ResolveDnsToIPAddress(),
TcpConnectionManager.ConnectionTimeout,
onConnectionEstablished,
onConnectionFailed,
verbose: !_interactiveMode);
}
typedConnection = new Connection(connection, new RawMessageFormatter(_bufferManager),
new LengthPrefixMessageFramer());
typedConnection.ConnectionClosed +=
(conn, error) => {
if (!_interactiveMode || error != SocketError.Success)
{
_log.Information(
"TcpTypedConnection: connection [{remoteEndPoint}, L{localEndPoint}] was closed {status}",
conn.RemoteEndPoint, conn.LocalEndPoint,
error == SocketError.Success ? "cleanly." : "with error: " + error + ".");
}
if (connectionClosed != null)
{
connectionClosed(conn, error);
}
else
{
_log.Information("connectionClosed callback was null");
}
};
connectionCreatedEvent.Set();
typedConnection.ReceiveAsync(
(conn, pkg) => {
var package = new TcpPackage();
bool validPackage = false;
try {
package = TcpPackage.FromArraySegment(new ArraySegment <byte>(pkg));
validPackage = true;
if (package.Command == TcpCommand.HeartbeatRequestCommand)
{
var resp = new TcpPackage(TcpCommand.HeartbeatResponseCommand, Guid.NewGuid(), null);
conn.EnqueueSend(resp.AsByteArray());
return;
}
handlePackage(conn, package);
} catch (Exception ex) {
_log.Information(ex,
"TcpTypedConnection: [{remoteEndPoint}, L{localEndPoint}] ERROR for {package}. Connection will be closed.",
conn.RemoteEndPoint, conn.LocalEndPoint,
validPackage ? package.Command as object : "<invalid package>");
conn.Close(ex.Message);
if (failContextOnError)
{
context.Fail(ex);
}
}
});
return(typedConnection);
}
public bool TryProcess(CommandProcessorContext context, string[] args, out int exitCode)
{
var commandName = args[0].ToUpper();
var commandArgs = args.Skip(1).ToArray();
ICmdProcessor commandProcessor;
if (!_processors.TryGetValue(commandName, out commandProcessor))
{
_log.Information("Unknown command: {command}.", commandName);
if (_regCommandsProcessor != null)
{
_regCommandsProcessor.Execute(context, new string[0]);
}
exitCode = 1;
return(false);
}
int exitC = 0;
var executedEvent = new AutoResetEvent(false);
ThreadPool.QueueUserWorkItem(_ => {
try {
var syntaxOk = commandProcessor.Execute(context, commandArgs);
if (syntaxOk)
{
exitC = context.ExitCode;
}
else
{
exitC = 1;
_log.Information("Usage of {command}:{newLine}{usage}", commandName, Environment.NewLine,
commandProcessor.Usage);
}
executedEvent.Set();
} catch (Exception exc) {
_log.Error(exc, "Error while executing command {command}.", commandName);
exitC = -1;
executedEvent.Set();
}
});
executedEvent.WaitOne(1000);
context.WaitForCompletion();
if (!string.IsNullOrWhiteSpace(context.Reason))
{
_log.Error("Error during execution of command: {e}.", context.Reason);
}
if (context.Error != null)
{
_log.Error(context.Error, "Error during execution of command");
var details = new StringBuilder();
BuildFullException(context.Error, details);
_log.Error("Details: {details}", details.ToString());
}
exitCode = exitC == 0 ? context.ExitCode : exitC;
return(true);
}
public Connection CreateTcpConnection(CommandProcessorContext context,
Action <Connection, TcpPackage> handlePackage,
Action <Connection> connectionEstablished = null,
Action <Connection, SocketError> connectionClosed = null,
bool failContextOnError = true,
IPEndPoint tcpEndPoint = null)
{
var connectionCreatedEvent = new AutoResetEvent(false);
Connection typedConnection = null;
var connection = _connector.ConnectTo(
tcpEndPoint ?? TcpEndpoint,
conn =>
{
Log.Info("Connected to [{0}].", conn.EffectiveEndPoint);
if (connectionEstablished != null)
{
connectionCreatedEvent.WaitOne(500);
connectionEstablished(typedConnection);
}
},
(conn, error) =>
{
var message = string.Format("Connection to [{0}] failed. Error: {1}.",
conn.EffectiveEndPoint,
error);
Log.Error(message);
if (connectionClosed != null)
{
connectionClosed(null, error);
}
if (failContextOnError)
{
context.Fail(reason: string.Format("Socket connection failed with error {0}.", error));
}
});
typedConnection = new Connection(connection, new RawMessageFormatter(_bufferManager), new LengthPrefixMessageFramer());
typedConnection.ConnectionClosed +=
(conn, error) =>
{
Log.Info("Connection [{0}] was closed {1}",
conn.EffectiveEndPoint,
error == SocketError.Success ? "cleanly." : "with error: " + error + ".");
if (connectionClosed != null)
{
connectionClosed(conn, error);
}
else
{
Log.Info("connectionClosed callback was null");
}
};
connectionCreatedEvent.Set();
typedConnection.ReceiveAsync(
(conn, pkg) =>
{
var package = new TcpPackage();
bool validPackage = false;
try
{
package = TcpPackage.FromArraySegment(new ArraySegment <byte>(pkg));
validPackage = true;
if (package.Command == TcpCommand.HeartbeatRequestCommand)
{
var resp = new TcpPackage(TcpCommand.HeartbeatResponseCommand, Guid.NewGuid(), null);
conn.EnqueueSend(resp.AsByteArray());
return;
}
handlePackage(conn, package);
}
catch (Exception ex)
{
Log.InfoException(ex,
"[{0}] ERROR for {1}. Connection will be closed.",
conn.EffectiveEndPoint,
validPackage ? package.Command as object : "<invalid package>");
conn.Close();
if (failContextOnError)
{
context.Fail(ex);
}
}
});
return(typedConnection);
}
