A simple chat server. More...
#include <SimpleChatServer.h>
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. | |
bool | changeName (const Wt::WString &user, const Wt::WString &newUser) |
Changes the name. | |
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::recursive_mutex | mutex_ |
UserSet | users_ |
A simple chat server.
Definition at line 74 of file SimpleChatServer.h.
typedef std::set<Wt::WString> SimpleChatServer::UserSet |
Typedef for a collection of user names.
Definition at line 111 of file SimpleChatServer.h.
SimpleChatServer::SimpleChatServer | ( | ) |
bool SimpleChatServer::changeName | ( | const Wt::WString & | user, |
const Wt::WString & | newUser | ||
) |
Changes the name.
Definition at line 84 of file SimpleChatServer.C.
{ if (user == newUser) return true; SyncLock<boost::recursive_mutex::scoped_lock> lock(mutex_); UserSet::iterator i = users_.find(user); if (i != users_.end()) { if (users_.find(newUser) == users_.end()) { users_.erase(i); users_.insert(newUser); chatEvent_.emit(ChatEvent(ChatEvent::Rename, user, newUser)); return true; } else return false; } else return false; }
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 107 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 52 of file SimpleChatServer.C.
{ // In every application path that holds a lock to a mutex while also // trying to update another application (as is in this method the // case during chatEvent_.emit()) we need to use Wt::SyncLock to // avoid dead-locks. SyncLock<boost::recursive_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 71 of file SimpleChatServer.C.
{ SyncLock<boost::recursive_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 120 of file SimpleChatServer.C.
{ SyncLock<boost::recursive_mutex::scoped_lock> lock(mutex_); chatEvent_.emit(ChatEvent(user, message)); }
WString SimpleChatServer::suggestGuest | ( | ) |
Get a suggestion for a guest user name.
Definition at line 107 of file SimpleChatServer.C.
{ SyncLock<boost::recursive_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 127 of file SimpleChatServer.C.
{ SyncLock<boost::recursive_mutex::scoped_lock> lock(mutex_); return users_; }
Wt::Signal<ChatEvent> SimpleChatServer::chatEvent_ [private] |
Definition at line 118 of file SimpleChatServer.h.
boost::recursive_mutex SimpleChatServer::mutex_ [private] |
Definition at line 119 of file SimpleChatServer.h.
UserSet SimpleChatServer::users_ [private] |
Definition at line 121 of file SimpleChatServer.h.