1 /* $Id: filter_frontend_net.cpp,v 1.25 2008-01-21 16:15:00 adam Exp $
2 Copyright (c) 2005-2007, Index Data.
4 This file is part of Metaproxy.
6 Metaproxy is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with Metaproxy; see the file LICENSE. If not, write to the
18 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
27 #include "package.hpp"
28 #include "thread_pool_observer.hpp"
29 #include "filter_frontend_net.hpp"
30 #include <yazpp/z-assoc.h>
31 #include <yazpp/pdu-assoc.h>
32 #include <yazpp/socket-manager.h>
37 namespace mp = metaproxy_1;
39 namespace metaproxy_1 {
41 class FrontendNet::Rep {
42 friend class FrontendNet;
44 std::vector<std::string> m_ports;
45 int m_listen_duration;
46 int m_session_timeout;
49 class My_Timer_Thread : public yazpp_1::ISocketObserver {
51 yazpp_1::ISocketObservable *m_obs;
55 My_Timer_Thread(yazpp_1::ISocketObservable *obs, int duration);
56 void socketNotify(int event);
59 class ZAssocChild : public yazpp_1::Z_Assoc {
62 ZAssocChild(yazpp_1::IPDU_Observable *the_PDU_Observable,
63 mp::ThreadPoolSocketObserver *m_thread_pool_observer,
64 const mp::Package *package);
67 yazpp_1::IPDU_Observer* sessionNotify(
68 yazpp_1::IPDU_Observable *the_PDU_Observable,
70 void recv_GDU(Z_GDU *apdu, int len);
76 mp::ThreadPoolSocketObserver *m_thread_pool_observer;
77 mp::Session m_session;
80 const mp::Package *m_package;
82 class ThreadPoolPackage : public mp::IThreadPoolMsg {
84 ThreadPoolPackage(mp::Package *package, mp::ZAssocChild *ses) :
85 m_session(ses), m_package(package) { };
87 IThreadPoolMsg *handle();
91 mp::ZAssocChild *m_session;
92 mp::Package *m_package;
95 class ZAssocServer : public yazpp_1::Z_Assoc {
98 ZAssocServer(yazpp_1::IPDU_Observable *PDU_Observable,
99 mp::ThreadPoolSocketObserver *m_thread_pool_observer,
100 const mp::Package *package,
103 yazpp_1::IPDU_Observer* sessionNotify(
104 yazpp_1::IPDU_Observable *the_PDU_Observable,
106 void recv_GDU(Z_GDU *apdu, int len);
109 void timeoutNotify();
110 void connectNotify();
112 mp::ThreadPoolSocketObserver *m_thread_pool_observer;
113 const mp::Package *m_package;
114 int m_session_timeout;
118 mp::ThreadPoolPackage::~ThreadPoolPackage()
123 void mp::ThreadPoolPackage::result()
125 m_session->m_no_requests--;
127 yazpp_1::GDU *gdu = &m_package->response();
132 m_session->send_GDU(gdu->get(), &len);
134 else if (!m_package->session().is_closed())
136 // no response package and yet the session is still open..
137 // means that request is unhandled..
138 yazpp_1::GDU *gdu_req = &m_package->request();
139 Z_GDU *z_gdu = gdu_req->get();
140 if (z_gdu && z_gdu->which == Z_GDU_Z3950)
142 // For Z39.50, response with a Close and shutdown
145 Z_APDU *apdu_response = odr.create_close(
146 z_gdu->u.z3950, Z_Close_systemProblem,
147 "unhandled Z39.50 request");
149 m_session->send_Z_PDU(apdu_response, &len);
150 m_package->session().close();
154 if (m_session->m_no_requests == 0 && m_package->session().is_closed())
161 mp::IThreadPoolMsg *mp::ThreadPoolPackage::handle()
168 mp::ZAssocChild::ZAssocChild(yazpp_1::IPDU_Observable *PDU_Observable,
169 mp::ThreadPoolSocketObserver *my_thread_pool,
170 const mp::Package *package)
171 : Z_Assoc(PDU_Observable)
173 m_thread_pool_observer = my_thread_pool;
175 m_delete_flag = false;
177 const char *peername = PDU_Observable->getpeername();
179 peername = "unknown";
180 m_origin.set_tcpip_address(std::string(peername), m_session.id());
184 yazpp_1::IPDU_Observer *mp::ZAssocChild::sessionNotify(yazpp_1::IPDU_Observable
185 *the_PDU_Observable, int fd)
190 mp::ZAssocChild::~ZAssocChild()
194 void mp::ZAssocChild::recv_GDU(Z_GDU *z_pdu, int len)
198 mp::Package *p = new mp::Package(m_session, m_origin);
200 mp::ThreadPoolPackage *tp = new mp::ThreadPoolPackage(p, this);
201 p->copy_filter(*m_package);
202 p->request() = yazpp_1::GDU(z_pdu);
203 m_thread_pool_observer->put(tp);
206 void mp::ZAssocChild::failNotify()
208 // TODO: send Package to signal "close"
209 if (m_session.is_closed())
218 mp::Package *p = new mp::Package(m_session, m_origin);
220 mp::ThreadPoolPackage *tp = new mp::ThreadPoolPackage(p, this);
221 p->copy_filter(*m_package);
222 m_thread_pool_observer->put(tp);
225 void mp::ZAssocChild::timeoutNotify()
230 void mp::ZAssocChild::connectNotify()
235 mp::ZAssocServer::ZAssocServer(yazpp_1::IPDU_Observable *PDU_Observable,
236 mp::ThreadPoolSocketObserver *thread_pool_observer,
237 const mp::Package *package,
239 : Z_Assoc(PDU_Observable), m_session_timeout(timeout)
241 m_thread_pool_observer = thread_pool_observer;
246 yazpp_1::IPDU_Observer *mp::ZAssocServer::sessionNotify(yazpp_1::IPDU_Observable
247 *the_PDU_Observable, int fd)
249 mp::ZAssocChild *my =
250 new mp::ZAssocChild(the_PDU_Observable, m_thread_pool_observer,
252 my->timeout(m_session_timeout);
256 mp::ZAssocServer::~ZAssocServer()
260 void mp::ZAssocServer::recv_GDU(Z_GDU *apdu, int len)
264 void mp::ZAssocServer::failNotify()
268 void mp::ZAssocServer::timeoutNotify()
272 void mp::ZAssocServer::connectNotify()
276 mp::filter::FrontendNet::FrontendNet() : m_p(new Rep)
278 m_p->m_no_threads = 5;
279 m_p->m_listen_duration = 0;
280 m_p->m_session_timeout = 300; // 5 minutes
283 mp::filter::FrontendNet::~FrontendNet()
287 bool mp::My_Timer_Thread::timeout()
292 mp::My_Timer_Thread::My_Timer_Thread(yazpp_1::ISocketObservable *obs,
294 m_obs(obs), m_pipe(9123), m_timeout(false)
296 obs->addObserver(m_pipe.read_fd(), this);
297 obs->maskObserver(this, yazpp_1::SOCKET_OBSERVE_READ);
298 obs->timeoutObserver(this, duration);
301 void mp::My_Timer_Thread::socketNotify(int event)
304 m_obs->deleteObserver(this);
307 void mp::filter::FrontendNet::process(Package &package) const
309 if (m_p->m_ports.size() == 0)
312 yazpp_1::SocketManager mySocketManager;
314 My_Timer_Thread *tt = 0;
315 if (m_p->m_listen_duration)
316 tt = new My_Timer_Thread(&mySocketManager, m_p->m_listen_duration);
318 ThreadPoolSocketObserver threadPool(&mySocketManager, m_p->m_no_threads);
320 mp::ZAssocServer **az = new mp::ZAssocServer *[m_p->m_ports.size()];
322 // Create mp::ZAssocServer for each port
324 for (i = 0; i<m_p->m_ports.size(); i++)
326 // create a PDU assoc object (one per mp::ZAssocServer)
327 yazpp_1::PDU_Assoc *as = new yazpp_1::PDU_Assoc(&mySocketManager);
329 // create ZAssoc with PDU Assoc
330 az[i] = new mp::ZAssocServer(as, &threadPool, &package,
331 m_p->m_session_timeout);
332 az[i]->server(m_p->m_ports[i].c_str());
334 while (mySocketManager.processEvent() > 0)
336 if (tt && tt->timeout())
339 for (i = 0; i<m_p->m_ports.size(); i++)
346 void mp::filter::FrontendNet::configure(const xmlNode * ptr)
348 if (!ptr || !ptr->children)
350 throw mp::filter::FilterException("No ports for Frontend");
352 std::vector<std::string> ports;
353 for (ptr = ptr->children; ptr; ptr = ptr->next)
355 if (ptr->type != XML_ELEMENT_NODE)
357 if (!strcmp((const char *) ptr->name, "port"))
359 std::string port = mp::xml::get_text(ptr);
360 ports.push_back(port);
363 else if (!strcmp((const char *) ptr->name, "threads"))
365 std::string threads_str = mp::xml::get_text(ptr);
366 int threads = atoi(threads_str.c_str());
368 throw mp::filter::FilterException("Bad value for threads: "
370 m_p->m_no_threads = threads;
372 else if (!strcmp((const char *) ptr->name, "timeout"))
374 std::string timeout_str = mp::xml::get_text(ptr);
375 int timeout = atoi(timeout_str.c_str());
377 throw mp::filter::FilterException("Bad value for timeout: "
379 m_p->m_session_timeout = timeout;
383 throw mp::filter::FilterException("Bad element "
384 + std::string((const char *)
388 m_p->m_ports = ports;
391 std::vector<std::string> &mp::filter::FrontendNet::ports()
396 int &mp::filter::FrontendNet::listen_duration()
398 return m_p->m_listen_duration;
401 static mp::filter::Base* filter_creator()
403 return new mp::filter::FrontendNet;
407 struct metaproxy_1_filter_struct metaproxy_1_filter_frontend_net = {
417 * indent-tabs-mode: nil
418 * c-file-style: "stroustrup"
420 * vim: shiftwidth=4 tabstop=8 expandtab