connectionmanager.h Example File
network/torrent/connectionmanager.h

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 #ifndef CONNECTIONMANAGER_H
 #define CONNECTIONMANAGER_H

 class PeerWireClient;

 #include <QByteArray>
 #include <QSet>

 class ConnectionManager
 {
 public:
     static ConnectionManager *instance();

     bool canAddConnection() const;
     void addConnection(PeerWireClient *connection);
     void removeConnection(PeerWireClient *connection);
     int maxConnections() const;
     QByteArray clientId() const;

  private:
     QSet<PeerWireClient *> connections;
     mutable QByteArray id;
 };

 #endif