/* This file is part of Metaproxy.
- Copyright (C) 2005-2012 Index Data
+ Copyright (C) Index Data
Metaproxy is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
#include <metaproxy/util.hpp>
#include "filter_session_shared.hpp"
+#include <yaz/copy_types.h>
#include <yaz/log.h>
#include <yaz/zgdu.h>
#include <yaz/otherinfo.h>
#include <map>
#include <iostream>
#include <time.h>
+#include <limits.h>
namespace mp = metaproxy_1;
namespace yf = metaproxy_1::filter;
time_t m_time_last_use;
void timestamp();
yazpp_1::RecordCache m_record_cache;
+
+ Z_OtherInformation *additionalSearchInfoRequest;
+ Z_OtherInformation *additionalSearchInfoResponse;
+ NMEM mem_additionalSearchInfo;
BackendSet(
const std::string &result_set_id,
const Databases &databases,
- const yazpp_1::Yaz_Z_Query &query);
+ const yazpp_1::Yaz_Z_Query &query,
+ Z_OtherInformation *additionalSearchInfoRequest);
+ ~BackendSet();
bool search(
Package &frontend_package,
Package &search_package,
BackendInstancePtr get_backend(const Package &package);
void use_backend(BackendInstancePtr b);
void release_backend(BackendInstancePtr b);
- void expire_class();
+ bool expire_instances();
yazpp_1::GDU m_init_request;
yazpp_1::GDU m_init_response;
boost::mutex m_mutex_backend_class;
+ boost::condition m_cond_set_ready;
int m_sequence_top;
time_t m_backend_set_ttl;
time_t m_backend_expiry_ttl;
size_t m_backend_set_max;
+ Odr_int m_preferredMessageSize;
+ Odr_int m_maximumRecordSize;
+ int m_no_failed;
+ int m_no_succeeded;
+ int m_no_init;
public:
BackendClass(const yazpp_1::GDU &init_request,
int resultset_ttl,
int resultset_max,
- int session_ttl);
+ int session_ttl,
+ Odr_int preferredRecordSize,
+ Odr_int maximumRecordSize);
~BackendClass();
};
// frontend result set
void present(Package &package, Z_APDU *apdu);
void scan(Package &package, Z_APDU *apdu);
+ int result_set_ref(ODR o,
+ const Databases &databases,
+ Z_RPNStructure *s, std::string &rset);
void get_set(mp::Package &package,
const Z_APDU *apdu_req,
const Databases &databases,
void release_frontend(Package &package);
Rep();
public:
+ ~Rep();
void expire();
private:
+ void expire_classes();
+ void stat();
void init(Package &package, const Z_GDU *gdu,
FrontendPtr frontend);
void start();
boost::mutex m_mutex;
boost::condition m_cond_session_ready;
+ boost::condition m_cond_expire_ready;
std::map<mp::Session, FrontendPtr> m_clients;
BackendClassMap m_backend_map;
bool m_optimize_search;
bool m_restart;
int m_session_max;
+ Odr_int m_preferredMessageSize;
+ Odr_int m_maximumRecordSize;
+ bool close_down;
};
}
}
void yf::SessionShared::BackendClass::release_backend(BackendInstancePtr b)
{
boost::mutex::scoped_lock lock(m_mutex_backend_class);
+ m_cond_set_ready.notify_all();
b->m_in_use = false;
}
void yf::SessionShared::BackendClass::remove_backend(BackendInstancePtr b)
{
- BackendInstanceList::iterator it = m_backend_list.begin();
-
- while (it != m_backend_list.end())
{
- if (*it == b)
+ boost::mutex::scoped_lock lock(m_mutex_backend_class);
+ BackendInstanceList::iterator it = m_backend_list.begin();
+ for (;;)
{
- mp::odr odr;
- (*it)->m_close_package->response() = odr.create_close(
- 0, Z_Close_lackOfActivity, 0);
- (*it)->m_close_package->session().close();
- (*it)->m_close_package->move();
-
- it = m_backend_list.erase(it);
- }
- else
+ if (it == m_backend_list.end())
+ return;
+ if (*it == b)
+ {
+ it = m_backend_list.erase(it);
+ break;
+ }
it++;
+ }
}
+ mp::odr odr;
+ b->m_close_package->response() = odr.create_close(
+ 0, Z_Close_lackOfActivity, 0);
+ b->m_close_package->session().close();
+ b->m_close_package->move();
}
-
yf::SessionShared::BackendInstancePtr
yf::SessionShared::BackendClass::get_backend(
const mp::Package &frontend_package)
yf::SessionShared::BackendInstance::~BackendInstance()
{
+ if (m_close_package)
+ {
+ mp::odr odr;
+ m_close_package->response() = odr.create_close(
+ 0, Z_Close_lackOfActivity, 0);
+ m_close_package->session().close();
+ m_close_package->move();
+ }
delete m_close_package;
}
yf::SessionShared::BackendInstancePtr yf::SessionShared::BackendClass::create_backend(
const mp::Package &frontend_package)
{
- BackendInstancePtr bp(new BackendInstance);
BackendInstancePtr null;
-
+ {
+ boost::mutex::scoped_lock lock(m_mutex_backend_class);
+ if (m_no_failed && !m_no_succeeded)
+ {
+ m_no_failed++;
+ return null;
+ }
+ }
+ BackendInstancePtr bp(new BackendInstance);
bp->m_close_package =
new mp::Package(bp->m_session, frontend_package.origin());
bp->m_close_package->copy_filter(frontend_package);
ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
+ if (m_preferredMessageSize)
+ *req->preferredMessageSize = m_preferredMessageSize;
+ if (m_maximumRecordSize)
+ *req->maximumRecordSize = m_maximumRecordSize;
+
init_package.request() = init_pdu;
+ {
+ boost::mutex::scoped_lock lock(m_mutex_backend_class);
+ m_no_init++;
+ }
+
init_package.move();
boost::mutex::scoped_lock lock(m_mutex_backend_class);
bp->m_sequence_this = 0;
bp->m_result_set_sequence = 0;
m_backend_list.push_back(bp);
+ m_no_succeeded++;
return bp;
}
}
init_package.session().close();
init_package.move();
}
+ m_no_failed++;
return null;
}
yf::SessionShared::BackendClass::BackendClass(const yazpp_1::GDU &init_request,
int resultset_ttl,
int resultset_max,
- int session_ttl)
+ int session_ttl,
+ Odr_int preferredMessageSize,
+ Odr_int maximumRecordSize)
: m_named_result_sets(false), m_init_request(init_request),
m_sequence_top(0), m_backend_set_ttl(resultset_ttl),
- m_backend_expiry_ttl(session_ttl), m_backend_set_max(resultset_max)
+ m_backend_expiry_ttl(session_ttl), m_backend_set_max(resultset_max),
+ m_preferredMessageSize(preferredMessageSize),
+ m_maximumRecordSize(maximumRecordSize),
+ m_no_failed(0), m_no_succeeded(0), m_no_init(0)
{}
yf::SessionShared::BackendClass::~BackendClass()
{}
+void yf::SessionShared::Rep::stat()
+{
+ int no_classes = 0;
+ int no_instances = 0;
+ BackendClassMap::const_iterator it;
+ {
+ boost::mutex::scoped_lock lock(m_mutex_backend_map);
+ for (it = m_backend_map.begin(); it != m_backend_map.end(); it++)
+ {
+ BackendClassPtr bc = it->second;
+ no_classes++;
+ BackendInstanceList::iterator bit = bc->m_backend_list.begin();
+ for (; bit != bc->m_backend_list.end(); bit++)
+ no_instances++;
+ }
+ }
+}
+
void yf::SessionShared::Rep::init(mp::Package &package, const Z_GDU *gdu,
FrontendPtr frontend)
{
BackendClassPtr b(new BackendClass(gdu->u.z3950,
m_resultset_ttl,
m_resultset_max,
- m_session_ttl));
+ m_session_ttl,
+ m_preferredMessageSize,
+ m_maximumRecordSize));
m_backend_map[k] = b;
frontend->m_backend_class = b;
}
// we only need to get init response from "first" target in
// backend class - the assumption being that init response is
// same for all
- if (bc->m_backend_list.size() == 0)
+ bool create_first_one = false;
+ {
+ boost::mutex::scoped_lock lock(bc->m_mutex_backend_class);
+ if (!bc->m_no_failed && !bc->m_no_succeeded && !bc->m_no_init)
+ create_first_one = true;
+ else
+ {
+ // first for first one to finish
+ while (!bc->m_no_failed && !bc->m_no_succeeded && bc->m_no_init)
+ {
+ bc->m_cond_set_ready.wait(lock);
+ }
+ }
+ }
+ if (create_first_one)
{
BackendInstancePtr backend = bc->create_backend(package);
-
if (backend)
bc->release_backend(backend);
}
-
yazpp_1::GDU init_response;
{
boost::mutex::scoped_lock lock(bc->m_mutex_backend_class);
Z_GDU *response_gdu = init_response.get();
mp::util::transfer_referenceId(odr, gdu->u.z3950,
response_gdu->u.z3950);
- Z_Options *server_options =
- response_gdu->u.z3950->u.initResponse->options;
+ Z_InitResponse *init_res = response_gdu->u.z3950->u.initResponse;
+ Z_Options *server_options = init_res->options;
Z_Options *client_options = &frontend->m_init_options;
int i;
for (i = 0; i < 30; i++)
if (!ODR_MASK_GET(client_options, i))
ODR_MASK_CLEAR(server_options, i);
+
+ if (!m_preferredMessageSize ||
+ *init_res->preferredMessageSize > *req->preferredMessageSize)
+ *init_res->preferredMessageSize = *req->preferredMessageSize;
+
+ if (!m_maximumRecordSize ||
+ *init_res->maximumRecordSize > *req->maximumRecordSize)
+ *init_res->maximumRecordSize = *req->maximumRecordSize;
+
package.response() = init_response;
if (!*response_gdu->u.z3950->u.initResponse->result)
package.session().close();
yf::SessionShared::BackendSet::BackendSet(
const std::string &result_set_id,
const Databases &databases,
- const yazpp_1::Yaz_Z_Query &query) :
+ const yazpp_1::Yaz_Z_Query &query,
+ Z_OtherInformation *additionalSearchInfo) :
m_result_set_id(result_set_id),
m_databases(databases), m_result_set_size(0), m_query(query)
{
timestamp();
+ mem_additionalSearchInfo = nmem_create();
+ additionalSearchInfoResponse = 0;
+ additionalSearchInfoRequest =
+ yaz_clone_z_OtherInformation(additionalSearchInfo,
+ mem_additionalSearchInfo);
+}
+
+yf::SessionShared::BackendSet::~BackendSet()
+{
+ nmem_destroy(mem_additionalSearchInfo);
}
static int get_diagnostic(Z_DefaultDiagFormat *r)
Z_APDU *apdu_req = zget_APDU(odr, Z_APDU_searchRequest);
Z_SearchRequest *req = apdu_req->u.searchRequest;
+ req->additionalSearchInfo = additionalSearchInfoRequest;
req->resultSetName = odr_strdup(odr, m_result_set_id.c_str());
req->query = m_query.get_Z_Query();
Z_SearchResponse *b_resp = gdu->u.z3950->u.searchResponse;
*z_records = b_resp->records;
m_result_set_size = *b_resp->resultCount;
+
+ additionalSearchInfoResponse = yaz_clone_z_OtherInformation(
+ b_resp->additionalSearchInfo, mem_additionalSearchInfo);
return true;
}
Z_APDU *f_apdu = 0;
BackendSetPtr &found_set)
{
bool session_restarted = false;
+ Z_OtherInformation *additionalSearchInfo = 0;
+
+ if (apdu_req->which == Z_APDU_searchRequest)
+ additionalSearchInfo = apdu_req->u.searchRequest->additionalSearchInfo;
restart:
std::string result_set_id;
{
// look at each backend and see if we have a similar search
BackendInstanceList::const_iterator it = bc->m_backend_list.begin();
- for (; it != bc->m_backend_list.end(); it++)
+ while (it != bc->m_backend_list.end())
{
- if (!(*it)->m_in_use)
+ bool restart = false;
+ BackendSetList::const_iterator set_it = (*it)->m_sets.begin();
+ for (; set_it != (*it)->m_sets.end(); set_it++)
{
- BackendSetList::const_iterator set_it = (*it)->m_sets.begin();
- for (; set_it != (*it)->m_sets.end(); set_it++)
+ // for real present request we don't care
+ // if additionalSearchInfo matches: same records
+ if ((*set_it)->m_databases == databases
+ && query.match(&(*set_it)->m_query)
+ && (apdu_req->which != Z_APDU_searchRequest ||
+ yaz_compare_z_OtherInformation(
+ additionalSearchInfo,
+ (*set_it)->additionalSearchInfoRequest)))
{
- if ((*set_it)->m_databases == databases
- && query.match(&(*set_it)->m_query))
+ if ((*it)->m_in_use)
+ {
+ bc->m_cond_set_ready.wait(lock);
+ restart = true;
+ break;
+ }
+ else
{
found_set = *set_it;
found_backend = *it;
}
}
}
+ if (restart)
+ it = bc->m_backend_list.begin();
+ else
+ it++;
}
}
override_set(found_backend, result_set_id, databases, out_of_sessions);
// we must search ...
BackendSetPtr new_set(new BackendSet(result_set_id,
- databases, query));
+ databases, query,
+ additionalSearchInfo));
+
+ found_set = new_set;
+ found_set->timestamp();
+ found_backend->m_sets.push_back(found_set);
+
Z_Records *z_records = 0;
Package search_package(found_backend->m_session, package.origin());
package.response() = f_apdu;
}
bc->release_backend(found_backend);
+ found_set.reset();
return; // search error
}
}
goto restart;
}
+#if 0
found_set = new_set;
found_set->timestamp();
found_backend->m_sets.push_back(found_set);
+#endif
+}
+
+int yf::SessionShared::Frontend::result_set_ref(ODR o,
+ const Databases &databases,
+ Z_RPNStructure *s,
+ std::string &rset)
+{
+ int ret = 0;
+ switch (s->which)
+ {
+ case Z_RPNStructure_simple:
+ if (s->u.simple->which == Z_Operand_resultSetId)
+ {
+ const char *id = s->u.simple->u.resultSetId;
+ rset = id;
+
+ FrontendSets::iterator fset_it = m_frontend_sets.find(id);
+ if (fset_it == m_frontend_sets.end())
+ {
+ ret = YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST;
+ }
+ else if (fset_it->second->get_databases() != databases)
+ {
+ ret = YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST;
+ }
+ else
+ {
+ yazpp_1::Yaz_Z_Query query = fset_it->second->get_query();
+ Z_Query *q = yaz_copy_Z_Query(query.get_Z_Query(), o);
+ if (q->which == Z_Query_type_1 || q->which == Z_Query_type_101)
+ {
+ s->which = q->u.type_1->RPNStructure->which;
+ s->u.simple = q->u.type_1->RPNStructure->u.simple;
+ }
+ else
+ {
+ ret = YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST;
+ }
+ }
+ }
+ break;
+ case Z_RPNStructure_complex:
+ ret = result_set_ref(o, databases, s->u.complex->s1, rset);
+ if (!ret)
+ ret = result_set_ref(o, databases, s->u.complex->s2, rset);
+ break;
+ }
+ return ret;
}
void yf::SessionShared::Frontend::search(mp::Package &package,
YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
0);
package.response() = apdu;
-
return;
}
m_frontend_sets.erase(fset_it);
}
- yazpp_1::Yaz_Z_Query query;
- query.set_Z_Query(req->query);
Databases databases;
int i;
for (i = 0; i < req->num_databaseNames; i++)
databases.push_back(req->databaseNames[i]);
+
+ yazpp_1::Yaz_Z_Query query;
+ query.set_Z_Query(req->query);
+
+ Z_Query *q = query.get_Z_Query();
+ if (q->which == Z_Query_type_1 || q->which == Z_Query_type_101)
+ {
+ mp::odr odr;
+ std::string rset;
+ int diag = result_set_ref(odr, databases, q->u.type_1->RPNStructure,
+ rset);
+ if (diag)
+ {
+ Z_APDU *apdu =
+ odr.create_searchResponse(
+ apdu_req,
+ diag,
+ rset.c_str());
+ package.response() = apdu;
+ return;
+ }
+ query.set_Z_Query(q);
+ }
+
BackendSetPtr found_set; // null
BackendInstancePtr found_backend; // null
Z_APDU *f_apdu = odr.create_searchResponse(apdu_req, 0, 0);
Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
*f_resp->resultCount = found_set->m_result_set_size;
+ f_resp->additionalSearchInfo = found_set->additionalSearchInfoResponse;
package.response() = f_apdu;
FrontendSetPtr fset(new FrontendSet(databases, query));
return;
Z_NamePlusRecordList *npr_res = 0;
- if (found_set->m_record_cache.lookup(odr, &npr_res,
- *req->resultSetStartPoint,
- *req->numberOfRecordsRequested,
- req->preferredRecordSyntax,
- req->recordComposition))
+ // record_cache.lookup types are int's. Avoid non-fitting values
+ if (*req->resultSetStartPoint > 0
+ && *req->resultSetStartPoint < INT_MAX
+ && *req->numberOfRecordsRequested > 0
+ && *req->numberOfRecordsRequested < INT_MAX
+ && found_set->m_record_cache.lookup(odr, &npr_res,
+ *req->resultSetStartPoint,
+ *req->numberOfRecordsRequested,
+ req->preferredRecordSyntax,
+ req->recordComposition))
{
Z_APDU *f_apdu_res = odr.create_presentResponse(apdu_req, 0, 0);
Z_PresentResponse *f_resp = f_apdu_res->u.presentResponse;
if (b_resp->records && b_resp->records->which == Z_Records_DBOSD)
{
- yaz_log(YLOG_LOG, "Adding " ODR_INT_PRINTF "+" ODR_INT_PRINTF
- " records to cache %p",
- *req->resultSetStartPoint,
- *f_resp->numberOfRecordsReturned,
- &found_set->m_record_cache);
- found_set->m_record_cache.add(
- odr,
- b_resp->records->u.databaseOrSurDiagnostics,
- *req->resultSetStartPoint,
- *f_resp->numberOfRecordsReturned);
+ Z_NamePlusRecordList *npr =
+ b_resp->records->u.databaseOrSurDiagnostics;
+ // record_cache.add types are int's. Avoid non-fitting values
+ if (*req->resultSetStartPoint > 0
+ && npr->num_records + *req->resultSetStartPoint < INT_MAX)
+ {
+#if 0
+ yaz_log(YLOG_LOG, "Adding " ODR_INT_PRINTF "+" ODR_INT_PRINTF
+ " records to cache %p",
+ *req->resultSetStartPoint,
+ *f_resp->numberOfRecordsReturned,
+ &found_set->m_record_cache);
+#endif
+ found_set->m_record_cache.add(
+ odr, npr, *req->resultSetStartPoint,
+ p_req->recordComposition);
+ }
}
bc->release_backend(found_backend);
}
m_p->expire();
}
-void yf::SessionShared::BackendClass::expire_class()
+bool yf::SessionShared::BackendClass::expire_instances()
{
time_t now;
time(&now);
}
else if (now < last_use || now - last_use > m_backend_expiry_ttl)
{
- mp::odr odr;
- (*bit)->m_close_package->response() = odr.create_close(
- 0, Z_Close_lackOfActivity, 0);
- (*bit)->m_close_package->session().close();
- (*bit)->m_close_package->move();
-
bit = m_backend_list.erase(bit);
}
else
bit++;
}
}
+ if (m_backend_list.empty())
+ return true;
+ return false;
+}
+
+void yf::SessionShared::Rep::expire_classes()
+{
+ boost::mutex::scoped_lock lock(m_mutex_backend_map);
+ BackendClassMap::iterator b_it = m_backend_map.begin();
+ while (b_it != m_backend_map.end())
+ {
+ if (b_it->second->expire_instances())
+ {
+ m_backend_map.erase(b_it);
+ b_it = m_backend_map.begin();
+ }
+ else
+ b_it++;
+ }
}
void yf::SessionShared::Rep::expire()
while (true)
{
boost::xtime xt;
- boost::xtime_get(&xt, boost::TIME_UTC);
- xt.sec += m_session_ttl / 3;
- boost::thread::sleep(xt);
-
- BackendClassMap::const_iterator b_it = m_backend_map.begin();
- for (; b_it != m_backend_map.end(); b_it++)
- b_it->second->expire_class();
+ boost::xtime_get(&xt,
+#if BOOST_VERSION >= 105000
+ boost::TIME_UTC_
+#else
+ boost::TIME_UTC
+#endif
+ );
+ xt.sec += m_session_ttl;
+ {
+ boost::mutex::scoped_lock lock(m_mutex);
+ m_cond_expire_ready.timed_wait(lock, xt);
+ if (close_down)
+ break;
+ }
+ stat();
+ expire_classes();
}
}
m_optimize_search = true;
m_restart = false;
m_session_max = 100;
+ m_preferredMessageSize = 0;
+ m_maximumRecordSize = 0;
+ close_down = false;
+}
+
+yf::SessionShared::Rep::~Rep()
+{
+ {
+ boost::mutex::scoped_lock lock(m_mutex);
+ close_down = true;
+ m_cond_expire_ready.notify_all();
+ }
+ m_thrds.join_all();
}
void yf::SessionShared::Rep::start()
attr->name));
}
}
+ else if (!strcmp((const char *) ptr->name, "init"))
+ {
+ const struct _xmlAttr *attr;
+ for (attr = ptr->properties; attr; attr = attr->next)
+ {
+ if (!strcmp((const char *) attr->name, "maximum-record-size"))
+ m_p->m_maximumRecordSize =
+ mp::xml::get_int(attr->children, 0);
+ else if (!strcmp((const char *) attr->name,
+ "preferred-message-size"))
+ m_p->m_preferredMessageSize =
+ mp::xml::get_int(attr->children, 0);
+ else
+ throw mp::filter::FilterException(
+ "Bad attribute " + std::string((const char *)
+ attr->name));
+ }
+ }
else
{
throw mp::filter::FilterException("Bad element "
projects / metaproxy-moved-to-github.git / blobdiff