A simple chat server. More...
#include <SimpleChatServer.h>
Classes | |
| struct | UserInfo |
Public Types | |
| typedef std::set< Wt::WString > | UserSet |
| Typedef for a collection of user names. | |
Public Member Functions | |
| SimpleChatServer (Wt::WServer &server) | |
| Create a new chat server. | |
| bool | login (const Wt::WString &user, const ChatEventCallback &handleEvent) |
| 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. | |
| UserSet | users () |
| Get the users currently logged in. | |
Private Types | |
| typedef std::map< Wt::WString, UserInfo > | UserMap |
Private Member Functions | |
| void | postChatEvent (const ChatEvent &event) |
Private Attributes | |
| Wt::WServer & | server_ |
| boost::recursive_mutex | mutex_ |
| UserMap | users_ |
A simple chat server.
Definition at line 82 of file SimpleChatServer.h.
typedef std::map<Wt::WString, UserInfo> SimpleChatServer::UserMap [private] |
Definition at line 126 of file SimpleChatServer.h.
| typedef std::set<Wt::WString> SimpleChatServer::UserSet |
Typedef for a collection of user names.
Definition at line 114 of file SimpleChatServer.h.
| SimpleChatServer::SimpleChatServer | ( | Wt::WServer & | server ) |
| bool SimpleChatServer::changeName | ( | const Wt::WString & | user, |
| const Wt::WString & | newUser | ||
| ) |
Changes the name.
Definition at line 83 of file SimpleChatServer.C.
{
if (user == newUser)
return true;
boost::recursive_mutex::scoped_lock lock(mutex_);
UserMap::iterator i = users_.find(user);
if (i != users_.end()) {
if (users_.find(newUser) == users_.end()) {
UserInfo info = i->second;
users_.erase(i);
users_[newUser] = info;
postChatEvent(ChatEvent(ChatEvent::Rename, user, newUser));
return true;
} else
return false;
} else
return false;
}
| bool SimpleChatServer::login | ( | const Wt::WString & | user, |
| const ChatEventCallback & | handleEvent | ||
| ) |
Try to login with given user name.
Returns false if the login was not successfull. The passed callback method is posted to when a new chat event is received.
Definition at line 51 of file SimpleChatServer.C.
{
boost::recursive_mutex::scoped_lock lock(mutex_);
if (users_.find(user) == users_.end()) {
UserInfo userInfo;
userInfo.sessionId = WApplication::instance()->sessionId();
userInfo.eventCallback = handleEvent;
users_[user] = userInfo;
postChatEvent(ChatEvent(ChatEvent::Login, user));
return true;
} else
return false;
}
| void SimpleChatServer::logout | ( | const Wt::WString & | user ) |
Logout from the server.
Definition at line 70 of file SimpleChatServer.C.
{
boost::recursive_mutex::scoped_lock lock(mutex_);
UserMap::iterator i = users_.find(user);
if (i != users_.end()) {
users_.erase(i);
postChatEvent(ChatEvent(ChatEvent::Logout, user));
}
}
| void SimpleChatServer::postChatEvent | ( | const ChatEvent & | event ) | [private] |
Definition at line 125 of file SimpleChatServer.C.
{
boost::recursive_mutex::scoped_lock lock(mutex_);
WApplication *app = WApplication::instance();
for (UserMap::const_iterator i = users_.begin(); i != users_.end(); ++i) {
/*
* If the user corresponds to the current application, we directly
* call the call back method. This avoids an unnecessary delay for
* the update to the user causing the event.
*
* For other uses, we post it to their session. By posting the
* event, we avoid dead-lock scenarios, race conditions, and
* delivering the event to a session that is just about to be
* terminated.
*/
if (app && app->sessionId() == i->second.sessionId)
i->second.eventCallback(event);
else
server_.post(i->second.sessionId,
boost::bind(i->second.eventCallback, event));
}
}
| 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.
{
postChatEvent(ChatEvent(user, message));
}
| WString SimpleChatServer::suggestGuest | ( | ) |
| SimpleChatServer::UserSet SimpleChatServer::users | ( | ) |
boost::recursive_mutex SimpleChatServer::mutex_ [private] |
Definition at line 129 of file SimpleChatServer.h.
Wt::WServer& SimpleChatServer::server_ [private] |
Definition at line 128 of file SimpleChatServer.h.
UserMap SimpleChatServer::users_ [private] |
Definition at line 130 of file SimpleChatServer.h.
1.7.2