-/* $Id: filter_virt_db.cpp,v 1.24 2006-01-14 08:38:57 adam Exp $
- Copyright (c) 2005, Index Data.
+/* $Id: filter_virt_db.cpp,v 1.41 2006-06-10 14:29:12 adam Exp $
+ Copyright (c) 2005-2006, Index Data.
-%LICENSE%
+ See the LICENSE file for details
*/
#include "config.hpp"
#include <map>
#include <iostream>
-namespace yf = yp2::filter;
+namespace mp = metaproxy_1;
+namespace yf = mp::filter;
-namespace yp2 {
+namespace metaproxy_1 {
namespace filter {
struct Virt_db::Set {
std::string m_setname;
};
struct Virt_db::Map {
- Map(std::string vhost, std::string route);
+ Map(std::list<std::string> targets, std::string route);
Map();
- std::string m_vhost;
+ std::list<std::string> m_targets;
std::string m_route;
};
struct Virt_db::Backend {
- yp2::Session m_backend_session;
- std::string m_backend_database;
- std::string m_frontend_database;
- std::string m_vhost;
+ mp::Session m_backend_session;
+ std::list<std::string> m_frontend_databases;
+ std::list<std::string> m_targets;
std::string m_route;
bool m_named_result_sets;
int m_number_of_sets;
struct Virt_db::Frontend {
Frontend(Rep *rep);
~Frontend();
- yp2::Session m_session;
+ mp::Session m_session;
bool m_is_virtual;
bool m_in_use;
+ yazpp_1::GDU m_init_gdu;
std::list<BackendPtr> m_backend_list;
std::map<std::string,Virt_db::Set> m_sets;
void close(Package &package);
typedef std::map<std::string,Virt_db::Set>::iterator Sets_it;
- BackendPtr lookup_backend_from_database(std::string database);
- BackendPtr create_backend_from_database(std::string database);
+ void fixup_npr(Package &p, BackendPtr b);
+
+ void fixup_npr(Z_Records *records, std::string database,
+ ODR odr);
+
+ BackendPtr lookup_backend_from_databases(
+ std::list<std::string> databases);
+ BackendPtr create_backend_from_databases(
+ std::list<std::string> databases,
+ int &error_code,
+ std::string &failing_database);
- BackendPtr init_backend(std::string database, Package &package,
+ BackendPtr init_backend(std::list<std::string> database,
+ Package &package,
int &error_code, std::string &addinfo);
Rep *m_p;
};
class Virt_db::Rep {
friend class Virt_db;
- friend class Frontend;
+ friend struct Frontend;
FrontendPtr get_frontend(Package &package);
void release_frontend(Package &package);
private:
- boost::mutex m_sessions_mutex;
std::map<std::string, Virt_db::Map>m_maps;
-
typedef std::map<std::string,Virt_db::Set>::iterator Sets_it;
-
boost::mutex m_mutex;
boost::condition m_cond_session_ready;
- std::map<yp2::Session, FrontendPtr> m_clients;
+ std::map<mp::Session, FrontendPtr> m_clients;
};
}
}
-using namespace yp2;
-
-yf::Virt_db::BackendPtr yf::Virt_db::Frontend::lookup_backend_from_database(
- std::string database)
+yf::Virt_db::BackendPtr yf::Virt_db::Frontend::lookup_backend_from_databases(
+ std::list<std::string> databases)
{
std::list<BackendPtr>::const_iterator map_it;
map_it = m_backend_list.begin();
for (; map_it != m_backend_list.end(); map_it++)
- if ((*map_it)->m_frontend_database == database)
+ if ((*map_it)->m_frontend_databases == databases)
return *map_it;
BackendPtr null;
return null;
}
-yf::Virt_db::BackendPtr yf::Virt_db::Frontend::create_backend_from_database(
- std::string database)
+yf::Virt_db::BackendPtr yf::Virt_db::Frontend::create_backend_from_databases(
+ std::list<std::string> databases, int &error_code, std::string &addinfo)
{
- std::map<std::string, Virt_db::Map>::iterator map_it;
- map_it = m_p->m_maps.find(database);
- if (map_it == m_p->m_maps.end())
- {
- BackendPtr ptr;
- return ptr;
- }
BackendPtr b(new Backend);
+ std::list<std::string>::const_iterator db_it = databases.begin();
b->m_number_of_sets = 0;
- b->m_frontend_database = database;
+ b->m_frontend_databases = databases;
b->m_named_result_sets = false;
- b->m_route = map_it->second.m_route;
- b->m_vhost = map_it->second.m_vhost;
- const char *sep = strchr(b->m_vhost.c_str(), '/');
- std::string backend_database;
- if (sep)
- b->m_backend_database = std::string(sep+1);
- else
- b->m_backend_database = database;
+
+ bool first_route = true;
+
+ std::map<std::string,bool> targets_dedup;
+ for (; db_it != databases.end(); db_it++)
+ {
+ std::map<std::string, Virt_db::Map>::iterator map_it;
+ map_it = m_p->m_maps.find(mp::util::database_name_normalize(*db_it));
+ if (map_it == m_p->m_maps.end()) // database not found
+ {
+ error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
+ addinfo = *db_it;
+ BackendPtr ptr;
+ return ptr;
+ }
+ std::list<std::string>::const_iterator t_it =
+ map_it->second.m_targets.begin();
+ for (; t_it != map_it->second.m_targets.end(); t_it++)
+ targets_dedup[*t_it] = true;
+
+ // see if we have a route conflict.
+ if (!first_route && b->m_route != map_it->second.m_route)
+ {
+ // we have a conflict..
+ error_code = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
+ BackendPtr ptr;
+ return ptr;
+ }
+ b->m_route = map_it->second.m_route;
+ first_route = false;
+ }
+ std::map<std::string,bool>::const_iterator tm_it = targets_dedup.begin();
+ for (; tm_it != targets_dedup.end(); tm_it++)
+ b->m_targets.push_back(tm_it->first);
return b;
}
yf::Virt_db::BackendPtr yf::Virt_db::Frontend::init_backend(
- std::string database, Package &package,
+ std::list<std::string> databases, mp::Package &package,
int &error_code, std::string &addinfo)
{
- BackendPtr b = create_backend_from_database(database);
+ BackendPtr b = create_backend_from_databases(databases, error_code,
+ addinfo);
if (!b)
- {
- error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
- addinfo = database;
return b;
- }
Package init_package(b->m_backend_session, package.origin());
init_package.copy_filter(package);
- yp2::odr odr;
+ mp::odr odr;
Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
-
- yaz_oi_set_string_oidval(&init_apdu->u.initRequest->otherInfo, odr,
- VAL_PROXY, 1, b->m_vhost.c_str());
-
+
+ mp::util::set_vhost_otherinfo(&init_apdu->u.initRequest->otherInfo, odr,
+ b->m_targets);
Z_InitRequest *req = init_apdu->u.initRequest;
+ // copy stuff from Frontend Init Request
+ Z_GDU *org_gdu = m_init_gdu.get();
+ Z_InitRequest *org_init = org_gdu->u.z3950->u.initRequest;
+
+ req->idAuthentication = org_init->idAuthentication;
+ req->implementationId = org_init->implementationId;
+ req->implementationName = org_init->implementationName;
+ req->implementationVersion = org_init->implementationVersion;
+
ODR_MASK_SET(req->options, Z_Options_search);
ODR_MASK_SET(req->options, Z_Options_present);
ODR_MASK_SET(req->options, Z_Options_namedResultSets);
init_package.request() = init_apdu;
init_package.move(b->m_route); // sending init
-
- if (init_package.session().is_closed())
- {
- error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
- addinfo = database;
- BackendPtr null;
- return null;
- }
+
Z_GDU *gdu = init_package.response().get();
// we hope to get an init response
if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
Z_APDU_initResponse)
{
- if (ODR_MASK_GET(gdu->u.z3950->u.initResponse->options,
- Z_Options_namedResultSets))
+ Z_InitResponse *res = gdu->u.z3950->u.initResponse;
+ if (ODR_MASK_GET(res->options, Z_Options_namedResultSets))
{
b->m_named_result_sets = true;
}
+ if (!*res->result)
+ {
+ mp::util::get_init_diagnostics(res, error_code, addinfo);
+ BackendPtr null;
+ return null;
+ }
}
else
{
error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
- addinfo = database;
+ // addinfo = database;
BackendPtr null;
return null;
}
+ if (init_package.session().is_closed())
+ {
+ error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
+ // addinfo = database;
+ BackendPtr null;
+ return null;
+ }
+
m_backend_list.push_back(b);
return b;
}
-void yf::Virt_db::Frontend::search(Package &package, Z_APDU *apdu_req)
+void yf::Virt_db::Frontend::search(mp::Package &package, Z_APDU *apdu_req)
{
Z_SearchRequest *req = apdu_req->u.searchRequest;
std::string vhost;
std::string resultSetId = req->resultSetName;
- yp2::odr odr;
-
- // only one datatabase for now
- if (req->num_databaseNames != 1)
- { // exactly one database must be specified
- Z_APDU *apdu =
- odr.create_searchResponse(
- apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
- package.response() = apdu;
-
- return;
- }
- std::string database = std::string(req->databaseNames[0]);
+ mp::odr odr;
+
+ std::list<std::string> databases;
+ int i;
+ for (i = 0; i<req->num_databaseNames; i++)
+ databases.push_back(req->databaseNames[i]);
BackendPtr b; // null for now
Sets_it sets_it = m_sets.find(req->resultSetName);
for (; map_it != m_backend_list.end(); map_it++)
{
BackendPtr tmp = *map_it;
- if (tmp->m_frontend_database == database)
+ if (tmp->m_frontend_databases == databases)
break;
}
if (map_it != m_backend_list.end())
for (; map_it != m_backend_list.end(); map_it++)
{
BackendPtr tmp = *map_it;
- if (tmp->m_frontend_database == database &&
+ if (tmp->m_frontend_databases == databases &&
(tmp->m_named_result_sets ||
tmp->m_number_of_sets == 0))
break;
{
int error_code;
std::string addinfo;
- b = init_backend(database, package, error_code, addinfo);
+ b = init_backend(databases, package, error_code, addinfo);
if (!b)
{
// did not get a backend (unavailable somehow?)
req->resultSetName = odr_strdup(odr, backend_setname.c_str());
}
- const char *backend_database = b->m_backend_database.c_str();
- req->databaseNames[0] = odr_strdup(odr, backend_database);
+ // pick first targets spec and move the databases from it ..
+ std::list<std::string>::const_iterator t_it = b->m_targets.begin();
+ if (t_it != b->m_targets.end())
+ {
+ mp::util::set_databases_from_zurl(odr, *t_it,
+ &req->num_databaseNames,
+ &req->databaseNames);
+ }
*req->replaceIndicator = 1;
if (search_package.session().is_closed())
{
- Z_APDU *apdu =
- odr.create_searchResponse(
- apdu_req,
- YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
- package.response() = apdu;
+ package.response() = search_package.response();
+ package.session().close();
return;
}
- package.response() = search_package.response();
-
b->m_number_of_sets++;
m_sets[resultSetId] = Virt_db::Set(b, backend_setname);
+ fixup_npr(search_package, b);
+ package.response() = search_package.response();
}
yf::Virt_db::Frontend::Frontend(Rep *rep)
m_is_virtual = false;
}
-void yf::Virt_db::Frontend::close(Package &package)
+void yf::Virt_db::Frontend::close(mp::Package &package)
{
std::list<BackendPtr>::const_iterator b_it;
{
}
-yf::Virt_db::FrontendPtr yf::Virt_db::Rep::get_frontend(Package &package)
+yf::Virt_db::FrontendPtr yf::Virt_db::Rep::get_frontend(mp::Package &package)
{
boost::mutex::scoped_lock lock(m_mutex);
- std::map<yp2::Session,yf::Virt_db::FrontendPtr>::iterator it;
+ std::map<mp::Session,yf::Virt_db::FrontendPtr>::iterator it;
while(true)
{
return f;
}
-void yf::Virt_db::Rep::release_frontend(Package &package)
+void yf::Virt_db::Rep::release_frontend(mp::Package &package)
{
boost::mutex::scoped_lock lock(m_mutex);
- std::map<yp2::Session,yf::Virt_db::FrontendPtr>::iterator it;
+ std::map<mp::Session,yf::Virt_db::FrontendPtr>::iterator it;
it = m_clients.find(package.session());
if (it != m_clients.end())
{
}
-yf::Virt_db::Map::Map(std::string vhost, std::string route)
- : m_vhost(vhost), m_route(route)
+yf::Virt_db::Map::Map(std::list<std::string> targets, std::string route)
+ : m_targets(targets), m_route(route)
{
}
yf::Virt_db::~Virt_db() {
}
-void yf::Virt_db::Frontend::present(Package &package, Z_APDU *apdu_req)
+
+void yf::Virt_db::Frontend::fixup_npr(Z_Records *records, std::string database,
+ ODR odr)
+{
+ if (records && records->which == Z_Records_DBOSD)
+ {
+ Z_NamePlusRecordList *nprlist = records->u.databaseOrSurDiagnostics;
+ int i;
+ for (i = 0; i < nprlist->num_records; i++)
+ {
+ Z_NamePlusRecord *npr = nprlist->records[i];
+ npr->databaseName = odr_strdup(odr, database.c_str());
+ }
+ }
+}
+
+void yf::Virt_db::Frontend::fixup_npr(mp::Package &p, BackendPtr b)
+{
+ Z_GDU *gdu = p.response().get();
+ mp::odr odr;
+ std::string database = "dummy";
+ std::list<std::string>::const_iterator db_it =
+ b->m_frontend_databases.begin();
+ if (db_it != b->m_frontend_databases.end())
+ database = *db_it;
+
+ if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
+ Z_APDU_presentResponse)
+ {
+ fixup_npr(gdu->u.z3950->u.presentResponse->records, database, odr);
+ p.response() = gdu;
+ }
+ if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
+ Z_APDU_searchResponse)
+ {
+ fixup_npr(gdu->u.z3950->u.searchResponse->records, database, odr);
+ p.response() = gdu;
+ }
+}
+
+void yf::Virt_db::Frontend::present(mp::Package &package, Z_APDU *apdu_req)
{
Z_PresentRequest *req = apdu_req->u.presentRequest;
std::string resultSetId = req->resultSetId;
- yp2::odr odr;
+ mp::odr odr;
Sets_it sets_it = m_sets.find(resultSetId);
if (sets_it == m_sets.end())
YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
resultSetId.c_str());
package.response() = apdu;
-
return;
}
Session *id =
- new yp2::Session(sets_it->second.m_backend->m_backend_session);
+ new mp::Session(sets_it->second.m_backend->m_backend_session);
// sending present to backend
Package present_package(*id, package.origin());
present_package.copy_filter(package);
+
+ req->resultSetId = odr_strdup(odr, sets_it->second.m_setname.c_str());
- req->resultSetId = odr_strdup(odr, "default");
present_package.request() = yazpp_1::GDU(apdu_req);
- present_package.move();
+ present_package.move(sets_it->second.m_backend->m_route);
+
+ fixup_npr(present_package, sets_it->second.m_backend);
if (present_package.session().is_closed())
{
- Z_APDU *apdu =
- odr.create_presentResponse(
- apdu_req,
- YAZ_BIB1_RESULT_SET_NO_LONGER_EXISTS_UNILATERALLY_DELETED_BY_,
- resultSetId.c_str());
- package.response() = apdu;
- m_sets.erase(resultSetId);
+ package.response() = present_package.response();
+ package.session().close();
+ return;
}
else
{
delete id;
}
-void yf::Virt_db::Frontend::scan(Package &package, Z_APDU *apdu_req)
+void yf::Virt_db::Frontend::scan(mp::Package &package, Z_APDU *apdu_req)
{
Z_ScanRequest *req = apdu_req->u.scanRequest;
std::string vhost;
- yp2::odr odr;
+ mp::odr odr;
+
+ std::list<std::string> databases;
+ int i;
+ for (i = 0; i<req->num_databaseNames; i++)
+ databases.push_back(req->databaseNames[i]);
- // only one datatabase for now
- if (req->num_databaseNames != 1)
- { // exactly one database must be specified
- Z_APDU *apdu =
- odr.create_scanResponse(
- apdu_req,
- YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
- package.response() = apdu;
- return;
- }
- std::string database = std::string(req->databaseNames[0]);
-
BackendPtr b;
// pick up any existing backend with a database match
std::list<BackendPtr>::const_iterator map_it;
for (; map_it != m_backend_list.end(); map_it++)
{
BackendPtr tmp = *map_it;
- if (tmp->m_frontend_database == database)
+ if (tmp->m_frontend_databases == databases)
break;
}
if (map_it != m_backend_list.end())
{
int error_code;
std::string addinfo;
- b = init_backend(database, package, error_code, addinfo);
+ b = init_backend(databases, package, error_code, addinfo);
if (!b)
{
// did not get a backend (unavailable somehow?)
scan_package.copy_filter(package);
- const char *backend_database = b->m_backend_database.c_str();
- req->databaseNames[0] = odr_strdup(odr, backend_database);
-
+ // pick first targets spec and move the databases from it ..
+ std::list<std::string>::const_iterator t_it = b->m_targets.begin();
+ if (t_it != b->m_targets.end())
+ {
+ mp::util::set_databases_from_zurl(odr, *t_it,
+ &req->num_databaseNames,
+ &req->databaseNames);
+ }
scan_package.request() = yazpp_1::GDU(apdu_req);
scan_package.move(b->m_route);
if (scan_package.session().is_closed())
{
- Z_APDU *apdu =
- odr.create_scanResponse(
- apdu_req, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
- package.response() = apdu;
+ package.response() = scan_package.response();
+ package.session().close();
return;
}
package.response() = scan_package.response();
}
-void yf::Virt_db::add_map_db2vhost(std::string db, std::string vhost,
- std::string route)
+void yf::Virt_db::add_map_db2targets(std::string db,
+ std::list<std::string> targets,
+ std::string route)
{
- m_p->m_maps[db] = Virt_db::Map(vhost, route);
+ m_p->m_maps[mp::util::database_name_normalize(db)]
+ = Virt_db::Map(targets, route);
}
-void yf::Virt_db::process(Package &package) const
+
+void yf::Virt_db::add_map_db2target(std::string db,
+ std::string target,
+ std::string route)
+{
+ std::list<std::string> targets;
+ targets.push_back(target);
+
+ m_p->m_maps[mp::util::database_name_normalize(db)]
+ = Virt_db::Map(targets, route);
+}
+
+void yf::Virt_db::process(mp::Package &package) const
{
FrontendPtr f = m_p->get_frontend(package);
{
Z_InitRequest *req = gdu->u.z3950->u.initRequest;
- const char *vhost =
- yaz_oi_get_string_oidval(&req->otherInfo, VAL_PROXY, 1, 0);
- if (!vhost)
+ std::list<std::string> vhosts;
+ mp::util::get_vhost_otherinfo(&req->otherInfo, false, vhosts);
+ if (vhosts.size() == 0)
{
- yp2::odr odr;
+ f->m_init_gdu = gdu;
+
+ mp::odr odr;
Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
Z_InitResponse *resp = apdu->u.initResponse;
Z_APDU *apdu = gdu->u.z3950;
if (apdu->which == Z_APDU_initRequest)
{
- yp2::odr odr;
+ mp::odr odr;
package.response() = odr.create_close(
apdu,
}
else
{
- yp2::odr odr;
+ mp::odr odr;
package.response() = odr.create_close(
apdu, Z_Close_protocolError,
}
-void yp2::filter::Virt_db::configure(const xmlNode * ptr)
+void mp::filter::Virt_db::configure(const xmlNode * ptr)
{
for (ptr = ptr->children; ptr; ptr = ptr->next)
{
if (!strcmp((const char *) ptr->name, "virtual"))
{
std::string database;
- std::string target;
+ std::list<std::string> targets;
xmlNode *v_node = ptr->children;
for (; v_node; v_node = v_node->next)
{
if (v_node->type != XML_ELEMENT_NODE)
continue;
- if (yp2::xml::is_element_yp2(v_node, "database"))
- database = yp2::xml::get_text(v_node);
- else if (yp2::xml::is_element_yp2(v_node, "target"))
- target = yp2::xml::get_text(v_node);
+ if (mp::xml::is_element_yp2(v_node, "database"))
+ database = mp::xml::get_text(v_node);
+ else if (mp::xml::is_element_yp2(v_node, "target"))
+ targets.push_back(mp::xml::get_text(v_node));
else
- throw yp2::filter::FilterException
+ throw mp::filter::FilterException
("Bad element "
+ std::string((const char *) v_node->name)
+ " in virtual section"
);
}
- std::string route = yp2::xml::get_route(ptr);
- add_map_db2vhost(database, target, route);
- std::cout << "Add " << database << "->" << target
- << "," << route << "\n";
+ std::string route = mp::xml::get_route(ptr);
+ add_map_db2targets(database, targets, route);
}
else
{
- throw yp2::filter::FilterException
+ throw mp::filter::FilterException
("Bad element "
+ std::string((const char *) ptr->name)
+ " in virt_db filter");
}
}
-static yp2::filter::Base* filter_creator()
+static mp::filter::Base* filter_creator()
{
- return new yp2::filter::Virt_db;
+ return new mp::filter::Virt_db;
}
extern "C" {
- struct yp2_filter_struct yp2_filter_virt_db = {
+ struct metaproxy_1_filter_struct metaproxy_1_filter_virt_db = {
0,
"virt_db",
filter_creator
projects / metaproxy-moved-to-github.git / blobdiff