2 * Copyright (c) 1998-1999, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
6 * $Log: yaz-pdu-observer.h,v $
7 * Revision 1.4 1999-03-23 14:17:57 adam
8 * More work on timeout handling. Work on yaz-client.
10 * Revision 1.3 1999/02/02 14:01:14 adam
11 * First WIN32 port of YAZ++.
13 * Revision 1.2 1999/01/28 13:08:41 adam
14 * Yaz_PDU_Assoc better encapsulated. Memory leak fix in
15 * yaz-socket-manager.cc.
17 * Revision 1.1.1.1 1999/01/28 09:41:07 adam
18 * First implementation of YAZ++.
22 #ifndef YAZ_PDU_OBSERVER_H
23 #define YAZ_PDU_OBSERVER_H
25 class IYaz_PDU_Observer;
27 /** Protocol Data Unit Observable.
28 This interface implements a Protocol Data Unit (PDU) network driver.
29 The PDU's is not encoded/decoded by this interface. They are simply
30 transmitted/received over the network. To use this interface the
31 IYaz_PDU_Observer interface must be implemented.
33 class YAZ_EXPORT IYaz_PDU_Observable {
35 /// Send encoded PDU buffer of specified length
36 virtual int send_PDU(const char *buf, int len) = 0;
37 /// Connect with server specified by addr.
38 virtual void connect(IYaz_PDU_Observer *observer, const char *addr) = 0;
39 /// Listen on address addr.
40 virtual void listen(IYaz_PDU_Observer *observer, const char *addr) = 0;
42 virtual void close() = 0;
43 /// Make clone of this object using this interface
44 virtual IYaz_PDU_Observable *clone() = 0;
45 /// Destroy completely
46 virtual void destroy() = 0;
48 virtual void idleTime (int timeout) = 0;
51 /** Protocol Data Unit Observer.
52 This interface is used together with the IYaz_PDU_Observable interface
53 and acts as a callback interface for it.
55 class YAZ_EXPORT IYaz_PDU_Observer {
57 /// A PDU has been received
58 virtual void recv_PDU(const char *buf, int len) = 0;
59 /// Called when Iyaz_PDU_Observabvle::connect was successful.
60 virtual void connectNotify() = 0;
61 /// Called whenever the connection was closed
62 virtual void failNotify() = 0;
63 /// Called whenever the connection was closed
64 virtual void timeoutNotify() = 0;
65 /// Make clone of observer using IYaz_PDU_Observable interface
66 virtual IYaz_PDU_Observer *clone(IYaz_PDU_Observable *the_PDU_Observable) = 0;