public Connection GetWorkflowClientConnection()
{
if (_workflowClientConnection == null)
{
lock (_wfconnectionlock)
{
if (_workflowClientConnection == null)
{
_workflowClientConnection = new Connection();
try
{
var connectionSetup = new ConnectionSetup();
connectionSetup.ParseConnectionString(_workflowConnectionString);
_workflowClientConnection.Open(connectionSetup);
}
catch (Exception ex)
{
if (_workflowClientConnection != null)
{
_workflowClientConnection.Dispose();
}
throw new Exception("Failed to create Connection to K2.", ex);
}
}
}
}
return _workflowClientConnection;
}
/// <summary>
/// Get Workflow Client with impersonate user
/// </summary>
/// <returns>The worklist connection to K2 Workflow server</returns>
public Connection GetWorkflowClient()
{
ConnectionStringSettings setting = ConfigurationManager.ConnectionStrings["WorkflowServer"];
if (_userAccount == null)
{
return(null);
}
if (setting == null)
{
return(null);
}
if (string.IsNullOrEmpty(setting.ConnectionString))
{
return(null);
}
ConnectionSetup connectionSetup = new ConnectionSetup();
connectionSetup.ParseConnectionString(setting.ConnectionString);
Connection connection = new Connection();
connection.Open(connectionSetup);
if (connection.User == null || string.Compare(connection.User.Name, _userAccount, StringComparison.OrdinalIgnoreCase) != 0)
{
connection.ImpersonateUser(_userAccount);
}
return(connection);
}
public K2Client(string identity)
{
this.ManagedUser = identity.FQNWithK2Label();
if (_connection == null)
{
var setup = new ConnectionSetup();
var setting = ConfigurationManager.ConnectionStrings["WorkflowServer"];
setup.ParseConnectionString(setting.ConnectionString);
_connection = new Connection();
_connection.Open(setup);
if (_connection.User == null || string.Compare(_connection.User.Name, ManagedUser, StringComparison.OrdinalIgnoreCase) != 0)
{
_connection.ImpersonateUser(ManagedUser);
}
}
}
public K2Connection(IServiceMarshalling serviceMarshalling, IServerMarshaling serverMarshaling)
{
// These values are static because they won't change on the server.
// This code will only execute once after K2HostServer starts
if (string.IsNullOrEmpty(defaultWorkflowServerConnectionString) || workflowServerPort == 0)
{
defaultWorkflowServerConnectionString = ConfigurationManager.ConnectionStrings["WorkflowServer"].ConnectionString;
ConnectionSetup workflowConnectionSetup = new ConnectionSetup();
workflowConnectionSetup.ParseConnectionString(defaultWorkflowServerConnectionString);
workflowServerPort = int.Parse(workflowConnectionSetup.ConnectionParameters[SourceCode.Workflow.Client.ConnectionSetup.ParamKeys.Port]);
}
sessionManager = serverMarshaling.GetSessionManagerContext();
var sessionCookie = SessionManager.CurrentSessionCookie;
sessionConnectionString = K2NEServiceBroker.SecurityManager.GetSessionConnectionString(sessionCookie);
}
public ContinuationAction MessageReceived(ListenerContext e)
{
// You can inherit from MessageExtendedInformation if you wish,
// the likely scenario for this is if you support plugins yourself.
var extended = e.ReceivedInformation.Message.GetExtendedInformation <MessageExtendedInformation>();
var replyExtended = extended.Invert(null);
string workflowName;
if (extended.Message.Title.StartsWith("START: ", StringComparison.OrdinalIgnoreCase))
{
workflowName = extended.Message.Title.Substring(7).Trim();
}
else
{
return(ContinuationAction.Continue); // Allow other plugins to execute.
}
// Get the message body.
string body;
try
{
using (var bodyStream = e.ReceivedInformation.Message.OpenView(new ContentType("text/plain")))
{
if (bodyStream != null)
{
// Another plugin may have moved the position within the stream.
bodyStream.Seek(0, System.IO.SeekOrigin.Begin);
using (var sr = new StreamReader(bodyStream))
{
body = sr.ReadToEnd().Trim();
}
}
else
{
body = string.Empty;
}
}
}
catch
{
// TODO: Logging etc.
return(ContinuationAction.Continue); // Allow other plugins to execute.
}
// TODO: Get data from the body somehow.
// You can also look into attachments for e.g. InfoPath forms:
// e.ReceivedInformation.Message.Attachments
try
{
var con = new Connection();
var cs = new ConnectionSetup();
cs.ParseConnectionString(_k2ServerConnectionString);
try
{
Exception lastException = null;
con.Open(cs);
// AlternateIdentities are identities with the same email
// address, most likely due badly configured claims.
for (var i = 0; i < e.AlternateIdentities.Length; i++)
{
var alt = e.AlternateIdentities[i];
string fqn;
// Search for a FQN in the identity.
if (alt.TryGetValue("Fqn", out fqn))
{
try
{
con.RevertUser();
con.ImpersonateUser(fqn);
var pi = con.CreateProcessInstance(workflowName);
// TODO: Set data in the workflow.
con.StartProcessInstance(pi);
// Tell the user the workflow was started.
_destination.ReplyTo(e.ReceivedInformation.Message, new MessageBodyReader("text/plain", "Workflow started"), replyExtended);
e.ReceivedInformation.Commit(); // Indicate we were able to handle the message.
return(ContinuationAction.Halt); // Stop other plugins from executing.
}
catch (Exception ex)
{
// TODO: Logging etc.
// This isn't nessecarily a complete failure,
// one of the other alternate identities may be
// able to action this.
lastException = ex;
}
}
}
string message;
if (lastException != null)
{
// Identities exist, but the user likely doesn't have rights.
message = lastException.ToString();
}
else
{
// No identities exist.
message = "Could not find a K2 user for your email address.";
}
message = "The workflow could not be started: " + message;
// Respond with the error.
_destination.ReplyTo(e.ReceivedInformation.Message, new MessageBodyReader("text/plain", message), replyExtended);
e.ReceivedInformation.Commit(); // Indicate we were able to handle the message.
return(ContinuationAction.Halt); // Stop other plugins from executing.
}
finally
{
if (con != null)
{
con.Close();
con.Dispose();
}
}
}
catch
{
// TODO: Logging etc.
return(ContinuationAction.Continue); // Allow other plugins to execute.
}
}
public ContinuationAction MessageReceived(ListenerContext e)
{
// You can inherit from MessageExtendedInformation if you wish,
// the likely scenario for this is if you support plugins yourself.
var extended = e.ReceivedInformation.Message.GetExtendedInformation<MessageExtendedInformation>();
var replyExtended = extended.Invert(null);
string workflowName;
if (extended.Message.Title.StartsWith("START: ", StringComparison.OrdinalIgnoreCase))
{
workflowName = extended.Message.Title.Substring(7).Trim();
}
else
{
return ContinuationAction.Continue; // Allow other plugins to execute.
}
// Get the message body.
string body;
try
{
using (var bodyStream = e.ReceivedInformation.Message.OpenView(new ContentType("text/plain")))
{
if (bodyStream != null)
{
// Another plugin may have moved the position within the stream.
bodyStream.Seek(0, System.IO.SeekOrigin.Begin);
using (var sr = new StreamReader(bodyStream))
{
body = sr.ReadToEnd().Trim();
}
}
else
{
body = string.Empty;
}
}
}
catch
{
// TODO: Logging etc.
return ContinuationAction.Continue; // Allow other plugins to execute.
}
// TODO: Get data from the body somehow.
// You can also look into attachments for e.g. InfoPath forms:
// e.ReceivedInformation.Message.Attachments
try
{
var con = new Connection();
var cs = new ConnectionSetup();
cs.ParseConnectionString(_k2ServerConnectionString);
try
{
Exception lastException = null;
con.Open(cs);
// AlternateIdentities are identities with the same email
// address, most likely due badly configured claims.
for (var i = 0; i < e.AlternateIdentities.Length; i++)
{
var alt = e.AlternateIdentities[i];
string fqn;
// Search for a FQN in the identity.
if (alt.TryGetValue("Fqn", out fqn))
{
try
{
con.RevertUser();
con.ImpersonateUser(fqn);
var pi = con.CreateProcessInstance(workflowName);
// TODO: Set data in the workflow.
con.StartProcessInstance(pi);
// Tell the user the workflow was started.
_destination.ReplyTo(e.ReceivedInformation.Message, new MessageBodyReader("text/plain", "Workflow started"), replyExtended);
e.ReceivedInformation.Commit(); // Indicate we were able to handle the message.
return ContinuationAction.Halt; // Stop other plugins from executing.
}
catch (Exception ex)
{
// TODO: Logging etc.
// This isn't nessecarily a complete failure,
// one of the other alternate identities may be
// able to action this.
lastException = ex;
}
}
}
string message;
if (lastException != null)
{
// Identities exist, but the user likely doesn't have rights.
message = lastException.ToString();
}
else
{
// No identities exist.
message = "Could not find a K2 user for your email address.";
}
message = "The workflow could not be started: " + message;
// Respond with the error.
_destination.ReplyTo(e.ReceivedInformation.Message, new MessageBodyReader("text/plain", message), replyExtended);
e.ReceivedInformation.Commit(); // Indicate we were able to handle the message.
return ContinuationAction.Halt; // Stop other plugins from executing.
}
finally
{
if (con != null)
{
con.Close();
con.Dispose();
}
}
}
catch
{
// TODO: Logging etc.
return ContinuationAction.Continue; // Allow other plugins to execute.
}
}
