SimpleChatServer Class Reference [Chat example]

A simple chat server. More...

#include <SimpleChatServer.h>

Inherits Wt::WObject.

List of all members.

Public Types
typedef std::set< Wt::WString >	UserSet
	Typedef for a collection of user names.
Public Member Functions
	SimpleChatServer ()
	Create a new chat server.
bool	login (const Wt::WString &user)
	Try to login with given user name.
void	logout (const Wt::WString &user)
	Logout from the server.
Wt::WString	suggestGuest ()
	Get a suggestion for a guest user name.
void	sendMessage (const Wt::WString &user, const Wt::WString &message)
	Send a message on behalve of a user.
Wt::Signal< ChatEvent > &	chatEvent ()
	Signal that will convey chat events.
UserSet	users ()
	Get the users currently logged in.
Private Attributes
Wt::Signal< ChatEvent >	chatEvent_
boost::mutex	mutex_
UserSet	users_

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Detailed Description

A simple chat server.

Definition at line 68 of file SimpleChatServer.h.

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Member Typedef Documentation

typedef std::set<Wt::WString> SimpleChatServer::UserSet

Typedef for a collection of user names.

Definition at line 101 of file SimpleChatServer.h.

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Constructor & Destructor Documentation

SimpleChatServer::SimpleChatServer

(

)

Create a new chat server.

Definition at line 42 of file SimpleChatServer.C.

  : chatEvent_(this)
{ }

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Member Function Documentation

Wt::Signal<ChatEvent>& SimpleChatServer::chatEvent

(

)

[inline]

Signal that will convey chat events.

Every client should connect to this signal, and process events.

Definition at line 97 of file SimpleChatServer.h.

{ return chatEvent_; }

bool SimpleChatServer::login

(

const Wt::WString &

user

)

Try to login with given user name.

Returns false if the login was not successfull.

Definition at line 46 of file SimpleChatServer.C.

{
  boost::mutex::scoped_lock lock(mutex_);
  
  if (users_.find(user) == users_.end()) {
    users_.insert(user);

    chatEvent_.emit(ChatEvent(ChatEvent::Login, user));

    return true;
  } else
    return false;
}

void SimpleChatServer::logout

(

const Wt::WString &

user

)

Logout from the server.

Definition at line 60 of file SimpleChatServer.C.

{
  boost::mutex::scoped_lock lock(mutex_);
  
  UserSet::iterator i = users_.find(user);

  if (i != users_.end()) {
    users_.erase(i);

    chatEvent_.emit(ChatEvent(ChatEvent::Logout, user));
  }
}

void SimpleChatServer::sendMessage	(	const Wt::WString &	user,
		const Wt::WString &	message
	)

Send a message on behalve of a user.

Definition at line 86 of file SimpleChatServer.C.

{
  boost::mutex::scoped_lock lock(mutex_);

  chatEvent_.emit(ChatEvent(user, message));
}

WString SimpleChatServer::suggestGuest

(

)

Get a suggestion for a guest user name.

Definition at line 73 of file SimpleChatServer.C.

{
  boost::mutex::scoped_lock lock(mutex_);

  for (int i = 1;; ++i) {
    std::string s = "guest " + boost::lexical_cast<std::string>(i);
    WString ss = s;

    if (users_.find(ss) == users_.end())
      return ss;
  }
}

SimpleChatServer::UserSet SimpleChatServer::users

(

)

Get the users currently logged in.

Definition at line 93 of file SimpleChatServer.C.

{
  return users_;
}

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Member Data Documentation

Wt::Signal<ChatEvent> SimpleChatServer::chatEvent_ [private]

Definition at line 108 of file SimpleChatServer.h.

boost::mutex SimpleChatServer::mutex_ [private]

Definition at line 109 of file SimpleChatServer.h.

UserSet SimpleChatServer::users_ [private]

Definition at line 111 of file SimpleChatServer.h.

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The documentation for this class was generated from the following files:

• /tmp/buildd/witty-3.1.2/examples/simplechat/SimpleChatServer.h
• /tmp/buildd/witty-3.1.2/examples/simplechat/SimpleChatServer.C