1 /* $Id: filter_virt_db.cpp,v 1.6 2005-10-25 21:32:01 adam Exp $
2 Copyright (c) 2005, Index Data.
11 #include "package.hpp"
13 #include <boost/thread/mutex.hpp>
15 #include "filter_virt_db.hpp"
19 #include <yaz/otherinfo.h>
20 #include <yaz/diagbib1.h>
26 namespace yf = yp2::filter;
31 Virt_db_set(yp2::Session &id, std::string setname,
36 yp2::Session m_session;
37 std::string m_setname;
40 struct Virt_db_session {
41 Virt_db_session(yp2::Session &id, bool use_vhost);
43 yp2::Session m_session;
45 std::map<std::string,Virt_db_set> m_sets;
48 Virt_db_map(std::string vhost);
55 void release_session(Package &package);
56 void init(Package &package, Z_APDU *apdu, bool &move_later);
57 void search(Package &package, Z_APDU *apdu, bool &move_later);
58 void present(Package &package, Z_APDU *apdu, bool &move_later);
60 boost::mutex m_sessions_mutex;
61 std::map<yp2::Session,Virt_db_session>m_sessions;
62 std::map<std::string, Virt_db_map>m_maps;
64 typedef std::map<yp2::Session,Virt_db_session>::iterator Ses_it;
65 typedef std::map<std::string,Virt_db_set>::iterator Sets_it;
70 yf::Virt_db_set::Virt_db_set(yp2::Session &id, std::string setname,
72 : m_session(id), m_setname(setname), m_vhost(vhost)
77 yf::Virt_db_set::Virt_db_set()
82 yf::Virt_db_set::~Virt_db_set()
86 yf::Virt_db_map::Virt_db_map(std::string vhost)
91 yf::Virt_db_map::Virt_db_map()
95 yf::Virt_db_session::Virt_db_session()
101 yf::Virt_db_session::Virt_db_session(yp2::Session &id,
103 m_session(id) , m_use_vhost(use_vhost)
108 yf::Virt_db::Virt_db() {
109 m_p = new Virt_db::Rep;
112 yf::Virt_db::~Virt_db() {
116 void yf::Virt_db::Rep::release_session(Package &package)
118 boost::mutex::scoped_lock lock(m_sessions_mutex);
120 m_sessions.erase(package.session());
123 void yf::Virt_db::Rep::present(Package &package, Z_APDU *apdu, bool &move_later){
125 Z_PresentRequest *req = apdu->u.presentRequest;
127 boost::mutex::scoped_lock lock(m_sessions_mutex);
129 Ses_it it = m_sessions.find(package.session());
130 if (it == m_sessions.end())
132 ODR odr = odr_createmem(ODR_ENCODE);
134 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
136 *apdu->u.close->closeReason = Z_Close_protocolError;
137 apdu->u.close->diagnosticInformation =
138 odr_strdup(odr, "no session for present request");
140 package.response() = apdu;
141 package.session().close();
146 if (it->second.m_use_vhost)
151 Sets_it sets_it = it->second.m_sets.find(req->resultSetId);
152 if (sets_it == it->second.m_sets.end())
154 ODR odr = odr_createmem(ODR_ENCODE);
155 Z_APDU *apdu = zget_APDU(odr, Z_APDU_presentResponse);
157 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
158 apdu->u.presentResponse->records = rec;
159 rec->which = Z_Records_NSD;
160 rec->u.nonSurrogateDiagnostic =
161 zget_DefaultDiagFormat(
163 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
165 package.response() = apdu;
169 id = new yp2::Session(sets_it->second.m_session);
171 ODR odr = odr_createmem(ODR_ENCODE);
173 // sending present to backend
174 Package present_package(*id, package.origin());
175 present_package.copy_filter(package);
177 req->resultSetId = odr_strdup(odr, "default");
178 present_package.request() = yazpp_1::GDU(apdu);
182 present_package.move();
184 package.response() = present_package.response();
185 // must check for a closed present session..
189 void yf::Virt_db::Rep::search(Package &package, Z_APDU *apdu, bool &move_later)
191 Z_SearchRequest *req = apdu->u.searchRequest;
193 std::string database;
196 boost::mutex::scoped_lock lock(m_sessions_mutex);
198 Ses_it it = m_sessions.find(package.session());
199 if (it == m_sessions.end())
201 ODR odr = odr_createmem(ODR_ENCODE);
203 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
205 *apdu->u.close->closeReason = Z_Close_protocolError;
206 apdu->u.close->diagnosticInformation =
207 odr_strdup(odr, "no session for search request");
209 package.response() = apdu;
210 package.session().close();
214 if (it->second.m_use_vhost)
219 if (req->num_databaseNames != 1)
220 { // exactly one database must be specified
221 ODR odr = odr_createmem(ODR_ENCODE);
222 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
224 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
225 apdu->u.searchResponse->records = rec;
226 rec->which = Z_Records_NSD;
227 rec->u.nonSurrogateDiagnostic =
228 zget_DefaultDiagFormat(
229 odr, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
230 package.response() = apdu;
235 database = req->databaseNames[0];
236 std::map<std::string, Virt_db_map>::iterator map_it;
237 map_it = m_maps.find(database);
238 if (map_it == m_maps.end())
239 { // no map for database: return diagnostic
240 ODR odr = odr_createmem(ODR_ENCODE);
241 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
243 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
244 apdu->u.searchResponse->records = rec;
245 rec->which = Z_Records_NSD;
246 rec->u.nonSurrogateDiagnostic =
247 zget_DefaultDiagFormat(
248 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
249 package.response() = apdu;
254 if (*req->replaceIndicator == 0)
256 Sets_it sets_it = it->second.m_sets.find(req->resultSetName);
257 if (sets_it != it->second.m_sets.end())
259 ODR odr = odr_createmem(ODR_ENCODE);
260 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
262 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
263 apdu->u.searchResponse->records = rec;
264 rec->which = Z_Records_NSD;
265 rec->u.nonSurrogateDiagnostic =
266 zget_DefaultDiagFormat(
268 YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
270 package.response() = apdu;
276 vhost = map_it->second.m_vhost;
279 it->second.m_sets[req->resultSetName] =
280 Virt_db_set(*id, req->resultSetName, vhost);
282 const char *vhost_cstr = vhost.c_str();
284 { // sending init to backend
285 Package init_package(*id, package.origin());
286 init_package.copy_filter(package);
288 ODR odr = odr_createmem(ODR_ENCODE);
289 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
291 yaz_oi_set_string_oidval(&init_apdu->u.initRequest->otherInfo, odr,
292 VAL_PROXY, 1, vhost_cstr);
294 init_package.request() = init_apdu;
297 init_package.move(); // sending init
299 if (init_package.session().is_closed())
301 ODR odr = odr_createmem(ODR_ENCODE);
302 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
304 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
305 apdu->u.searchResponse->records = rec;
306 rec->which = Z_Records_NSD;
307 rec->u.nonSurrogateDiagnostic =
308 zget_DefaultDiagFormat(
309 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
310 package.response() = apdu;
316 // sending search to backend
317 Package search_package(*id, package.origin());
319 search_package.copy_filter(package);
320 const char *sep = strchr(vhost_cstr, '/');
321 ODR odr = odr_createmem(ODR_ENCODE);
323 req->databaseNames[0] = odr_strdup(odr, sep+1);
325 *req->replaceIndicator = 1;
326 req->resultSetName = odr_strdup(odr, "default");
327 search_package.request() = yazpp_1::GDU(apdu);
331 search_package.move();
333 package.response() = search_package.response();
334 // must check for a closed search session..
338 void yf::Virt_db::Rep::init(Package &package, Z_APDU *apdu, bool &move_later)
340 release_session(package);
341 boost::mutex::scoped_lock lock(m_sessions_mutex);
343 Z_InitRequest *req = apdu->u.initRequest;
346 yaz_oi_get_string_oidval(&req->otherInfo, VAL_PROXY, 1, 0);
349 ODR odr = odr_createmem(ODR_ENCODE);
351 Z_APDU *apdu = zget_APDU(odr, Z_APDU_initResponse);
352 Z_InitResponse *resp = apdu->u.initResponse;
355 static const int masks[] = {
356 Z_Options_search, Z_Options_present, Z_Options_namedResultSets, -1
358 for (i = 0; masks[i] != -1; i++)
359 if (ODR_MASK_GET(req->options, masks[i]))
360 ODR_MASK_SET(resp->options, masks[i]);
362 static const int versions[] = {
368 for (i = 0; versions[i] != -1; i++)
369 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
370 ODR_MASK_SET(resp->protocolVersion, versions[i]);
374 package.response() = apdu;
378 m_sessions[package.session()] = Virt_db_session(package.session(), false);
382 m_sessions[package.session()] = Virt_db_session(package.session(), true);
387 void yf::Virt_db::add_map_db2vhost(std::string db, std::string vhost)
389 m_p->m_maps[db] = Virt_db_map(vhost);
392 void yf::Virt_db::process(Package &package) const
394 Z_GDU *gdu = package.request().get();
396 if (!gdu || gdu->which != Z_GDU_Z3950)
400 bool move_later = false;
401 Z_APDU *apdu = gdu->u.z3950;
402 if (apdu->which == Z_APDU_initRequest)
404 m_p->init(package, apdu, move_later);
406 else if (apdu->which == Z_APDU_searchRequest)
408 m_p->search(package, apdu, move_later);
410 else if (apdu->which == Z_APDU_presentRequest)
412 m_p->present(package, apdu, move_later);
416 ODR odr = odr_createmem(ODR_ENCODE);
418 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
420 *apdu->u.close->closeReason = Z_Close_protocolError;
422 apdu->u.close->diagnosticInformation =
423 odr_strdup(odr, "unsupported APDU in filter_virt_db");
425 package.response() = apdu;
426 package.session().close();
432 if (package.session().is_closed())
433 m_p->release_session(package);
440 * indent-tabs-mode: nil
441 * c-file-style: "stroustrup"
443 * vim: shiftwidth=4 tabstop=8 expandtab