1 /* $Id: filter_z3950_client.cpp,v 1.16 2006-01-09 13:43:59 adam Exp $
2 Copyright (c) 2005, Index Data.
11 #include "package.hpp"
13 #include "filter_z3950_client.hpp"
20 #include <boost/thread/mutex.hpp>
21 #include <boost/thread/condition.hpp>
25 #include <yaz/otherinfo.h>
26 #include <yaz/diagbib1.h>
28 #include <yaz++/socket-manager.h>
29 #include <yaz++/pdu-assoc.h>
30 #include <yaz++/z-assoc.h>
32 namespace yf = yp2::filter;
36 class Z3950Client::Assoc : public yazpp_1::Z_Assoc{
38 Assoc(yazpp_1::SocketManager *socket_manager,
39 yazpp_1::IPDU_Observable *PDU_Observable,
45 void recv_GDU(Z_GDU *gdu, int len);
46 yazpp_1::IPDU_Observer* sessionNotify(
47 yazpp_1::IPDU_Observable *the_PDU_Observable,
50 yazpp_1::SocketManager *m_socket_manager;
51 yazpp_1::IPDU_Observable *m_PDU_Observable;
62 class Z3950Client::Rep {
65 boost::condition m_cond_session_ready;
66 std::map<yp2::Session,Z3950Client::Assoc *> m_clients;
67 Z3950Client::Assoc *get_assoc(Package &package);
68 void send_and_receive(Package &package,
69 yf::Z3950Client::Assoc *c);
70 void release_assoc(Package &package);
77 yf::Z3950Client::Assoc::Assoc(yazpp_1::SocketManager *socket_manager,
78 yazpp_1::IPDU_Observable *PDU_Observable,
80 : Z_Assoc(PDU_Observable),
81 m_socket_manager(socket_manager), m_PDU_Observable(PDU_Observable),
82 m_package(0), m_in_use(true), m_waiting(false),
83 m_destroyed(false), m_connected(false), m_queue_len(1), m_ticks(0),
86 // std::cout << "create assoc " << this << "\n";
89 yf::Z3950Client::Assoc::~Assoc()
91 // std::cout << "destroy assoc " << this << "\n";
94 void yf::Z3950Client::Assoc::connectNotify()
101 void yf::Z3950Client::Assoc::failNotify()
109 m_package->response() = odr.create_close(Z_Close_peerAbort, 0);
110 m_package->session().close();
114 void yf::Z3950Client::Assoc::timeoutNotify()
126 m_package->response() = odr.create_close(Z_Close_lackOfActivity, 0);
128 m_package->response() = odr.create_close(Z_Close_peerAbort, 0);
130 m_package->session().close();
135 void yf::Z3950Client::Assoc::recv_GDU(Z_GDU *gdu, int len)
140 m_package->response() = gdu;
143 yazpp_1::IPDU_Observer *yf::Z3950Client::Assoc::sessionNotify(
144 yazpp_1::IPDU_Observable *the_PDU_Observable,
151 yf::Z3950Client::Z3950Client() : m_p(new yf::Z3950Client::Rep)
155 yf::Z3950Client::~Z3950Client() {
158 yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package)
160 // only one thread messes with the clients list at a time
161 boost::mutex::scoped_lock lock(m_mutex);
163 std::map<yp2::Session,yf::Z3950Client::Assoc *>::iterator it;
165 Z_GDU *gdu = package.request().get();
166 // only deal with Z39.50
167 if (!gdu || gdu->which != Z_GDU_Z3950)
172 it = m_clients.find(package.session());
173 if (it != m_clients.end())
175 it->second->m_queue_len++;
179 if (gdu && gdu->which == Z_GDU_Z3950 &&
180 gdu->u.z3950->which == Z_APDU_initRequest)
182 yazpp_1::SocketManager *s = it->second->m_socket_manager;
183 delete it->second; // destroy Z_Assoc
184 delete s; // then manager
189 if (!it->second->m_in_use)
191 it->second->m_in_use = true;
194 m_cond_session_ready.wait(lock);
197 // new Z39.50 session ..
198 Z_APDU *apdu = gdu->u.z3950;
199 // check that it is init. If not, close
200 if (apdu->which != Z_APDU_initRequest)
204 package.response() = odr.create_close(Z_Close_protocolError,
205 "First PDU was not an "
206 "Initialize Request");
207 package.session().close();
210 // check virtual host
212 yaz_oi_get_string_oidval(&apdu->u.initRequest->otherInfo,
217 package.response() = odr.create_initResponse(
218 YAZ_BIB1_INIT_NEGOTIATION_OPTION_REQUIRED,
219 "Virtual host not given");
221 package.session().close();
225 yazpp_1::SocketManager *sm = new yazpp_1::SocketManager;
226 yazpp_1::PDU_Assoc *pdu_as = new yazpp_1::PDU_Assoc(sm);
227 yf::Z3950Client::Assoc *as = new yf::Z3950Client::Assoc(sm, pdu_as, vhost);
228 m_clients[package.session()] = as;
232 void yf::Z3950Client::Rep::send_and_receive(Package &package,
233 yf::Z3950Client::Assoc *c)
235 Z_GDU *gdu = package.request().get();
240 if (!gdu || gdu->which != Z_GDU_Z3950)
244 c->m_package = &package;
248 c->client(c->m_host.c_str());
251 while (!c->m_destroyed && c->m_waiting
252 && c->m_socket_manager->processEvent() > 0)
264 // relay the package ..
266 c->send_GDU(gdu, &len);
268 switch(gdu->u.z3950->which)
270 case Z_APDU_triggerResourceControlRequest:
274 // for the rest: wait for a response PDU
275 while (!c->m_destroyed && c->m_waiting
276 && c->m_socket_manager->processEvent() > 0)
282 void yf::Z3950Client::Rep::release_assoc(Package &package)
284 boost::mutex::scoped_lock lock(m_mutex);
285 std::map<yp2::Session,yf::Z3950Client::Assoc *>::iterator it;
287 it = m_clients.find(package.session());
288 if (it != m_clients.end())
290 Z_GDU *gdu = package.request().get();
291 if (gdu && gdu->which == Z_GDU_Z3950)
292 { // only Z39.50 packages lock in get_assoc.. release it
293 it->second->m_in_use = false;
294 it->second->m_queue_len--;
297 if (package.session().is_closed())
299 // destroy hint (send_and_receive)
300 it->second->m_destroyed = true;
302 // wait until no one is waiting for it.
303 while (it->second->m_queue_len)
304 m_cond_session_ready.wait(lock);
306 // the Z_Assoc and PDU_Assoc must be destroyed before
307 // the socket manager.. so pull that out.. first..
308 yazpp_1::SocketManager *s = it->second->m_socket_manager;
309 delete it->second; // destroy Z_Assoc
310 delete s; // then manager
313 m_cond_session_ready.notify_all();
317 void yf::Z3950Client::process(Package &package) const
319 yf::Z3950Client::Assoc *c = m_p->get_assoc(package);
322 m_p->send_and_receive(package, c);
324 m_p->release_assoc(package);
328 static yp2::filter::Base* filter_creator()
330 return new yp2::filter::Z3950Client;
334 struct yp2_filter_struct yp2_filter_z3950_client = {
344 * indent-tabs-mode: nil
345 * c-file-style: "stroustrup"
347 * vim: shiftwidth=4 tabstop=8 expandtab