/* This file is part of Metaproxy.
- Copyright (C) 2005-2008 Index Data
+ Copyright (C) 2005-2009 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 <yaz/otherinfo.h>
#include <yaz/diagbib1.h>
#include <yazpp/z-query.h>
+#include <yazpp/record-cache.h>
#include <map>
#include <iostream>
#include <time.h>
yazpp_1::Yaz_Z_Query m_query;
time_t m_time_last_use;
void timestamp();
+ yazpp_1::RecordCache m_record_cache;
BackendSet(
const std::string &result_set_id,
const Databases &databases,
Package &frontend_package,
const Z_APDU *apdu_req,
const BackendInstancePtr bp,
- bool &fatal_error);
+ Z_Records **z_records);
};
// backend connection instance
class SessionShared::BackendInstance {
timestamp();
}
+static int get_diagnostic(Z_DefaultDiagFormat *r)
+{
+ return *r->condition;
+}
+
bool yf::SessionShared::BackendSet::search(
mp::Package &frontend_package,
const Z_APDU *frontend_apdu,
const BackendInstancePtr bp,
- bool & fatal_error)
+ Z_Records **z_records)
{
Package search_package(bp->m_session, frontend_package.origin());
search_package.request() = apdu_req;
search_package.move();
- fatal_error = false; // assume backend session is good
- Z_Records *z_records_diag = 0;
Z_GDU *gdu = search_package.response().get();
if (!search_package.session().is_closed()
&& gdu && gdu->which == Z_GDU_Z3950
&& gdu->u.z3950->which == Z_APDU_searchResponse)
{
Z_SearchResponse *b_resp = gdu->u.z3950->u.searchResponse;
- if (b_resp->records)
- {
- if (b_resp->records->which == Z_Records_NSD
- || b_resp->records->which == Z_Records_multipleNSD)
- z_records_diag = b_resp->records;
- }
- if (z_records_diag)
- {
- // there could be diagnostics that are so bad.. that
- // we simply mark the error as fatal.. For now we assume
- // we can resume
- if (frontend_apdu->which == Z_APDU_searchRequest)
- {
- Z_APDU *f_apdu = odr.create_searchResponse(frontend_apdu,
- 0, 0);
- Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
- *f_resp->searchStatus = *b_resp->searchStatus;
- f_resp->records = z_records_diag;
- frontend_package.response() = f_apdu;
- return false;
- }
- if (frontend_apdu->which == Z_APDU_presentRequest)
- {
- Z_APDU *f_apdu = odr.create_presentResponse(frontend_apdu,
- 0, 0);
- Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
- f_resp->records = z_records_diag;
- frontend_package.response() = f_apdu;
- return false;
- }
- }
+ *z_records = b_resp->records;
m_result_set_size = *b_resp->resultCount;
return true;
}
f_apdu = odr.create_close(
frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
frontend_package.response() = f_apdu;
- fatal_error = true; // weired response.. bad backend
return false;
}
BackendInstancePtr &found_backend,
BackendSetPtr &found_set)
{
+ bool session_restarted = false;
+
+restart:
std::string result_set_id;
BackendClassPtr bc = m_backend_class;
{
// we must search ...
BackendSetPtr new_set(new BackendSet(result_set_id,
databases, query));
- bool fatal_error = false;
- if (!new_set->search(package, apdu_req, found_backend, fatal_error))
+ Z_Records *z_records = 0;
+ if (!new_set->search(package, apdu_req, found_backend, &z_records))
{
- if (fatal_error)
+ bc->remove_backend(found_backend);
+ return; // search error
+ }
+
+ if (z_records)
+ {
+ int condition = 0;
+ if (z_records->which == Z_Records_NSD)
+ {
+ condition =
+ get_diagnostic(z_records->u.nonSurrogateDiagnostic);
+ }
+ else if (z_records->which == Z_Records_multipleNSD)
+ {
+ if (z_records->u.multipleNonSurDiagnostics->num_diagRecs >= 1
+ &&
+
+ z_records->u.multipleNonSurDiagnostics->diagRecs[0]->which ==
+ Z_DiagRec_defaultFormat)
+ {
+ condition = get_diagnostic(
+ z_records->u.multipleNonSurDiagnostics->diagRecs[0]->u.defaultFormat);
+
+ }
+ }
+ if (!session_restarted &&
+ condition == YAZ_BIB1_TEMPORARY_SYSTEM_ERROR)
+ {
bc->remove_backend(found_backend);
- else
+ session_restarted = true;
+ found_backend.reset();
+ goto restart;
+
+ }
+
+ if (condition)
+ {
+ mp::odr odr;
+ if (apdu_req->which == Z_APDU_searchRequest)
+ {
+ Z_APDU *f_apdu = odr.create_searchResponse(apdu_req,
+ 0, 0);
+ Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
+ *f_resp->searchStatus = Z_SearchResponse_none;
+ f_resp->records = z_records;
+ package.response() = f_apdu;
+ }
+ if (apdu_req->which == Z_APDU_presentRequest)
+ {
+ Z_APDU *f_apdu = odr.create_presentResponse(apdu_req,
+ 0, 0);
+ Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
+ f_resp->records = z_records;
+ package.response() = f_apdu;
+ }
bc->release_backend(found_backend);
- return; // search error
+ return; // search error
+ }
+ }
+ if (!session_restarted && new_set->m_result_set_size < 0)
+ {
+ bc->remove_backend(found_backend);
+ session_restarted = true;
+ found_backend.reset();
+ goto restart;
}
+
found_set = new_set;
found_set->timestamp();
found_backend->m_sets.push_back(found_set);
if (!found_set)
return;
+ Z_NamePlusRecordList *npr_res = 0;
+ if (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;
+
+ yaz_log(YLOG_LOG, "Found %d+%d records in cache %p",
+ *req->resultSetStartPoint,
+ *req->numberOfRecordsRequested,
+ &found_set->m_record_cache);
+
+ *f_resp->numberOfRecordsReturned = *req->numberOfRecordsRequested;
+ *f_resp->nextResultSetPosition =
+ *req->resultSetStartPoint + *req->numberOfRecordsRequested;
+ // f_resp->presentStatus assumed OK.
+ f_resp->records = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
+ f_resp->records->which = Z_Records_DBOSD;
+ f_resp->records->u.databaseOrSurDiagnostics = npr_res;
+ package.response() = f_apdu_res;
+ bc->release_backend(found_backend);
+ return;
+ }
+
Z_APDU *p_apdu = zget_APDU(odr, Z_APDU_presentRequest);
Z_PresentRequest *p_req = p_apdu->u.presentRequest;
p_req->preferredRecordSyntax = req->preferredRecordSyntax;
f_resp->records = b_resp->records;
f_resp->otherInfo = b_resp->otherInfo;
package.response() = f_apdu_res;
+
+ if (b_resp->records && b_resp->records->which == Z_Records_DBOSD)
+ {
+ yaz_log(YLOG_LOG, "Adding %d+%d 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);
+ }
bc->release_backend(found_backend);
}
else
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
- * c-file-style: "stroustrup"
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
+
projects / metaproxy-moved-to-github.git / blobdiff