--- /dev/null
+/* $Id: p2_msg.cpp,v 1.1 2005-10-05 12:07:14 adam Exp $
+ Copyright (c) 1998-2005, Index Data.
+
+This file is part of the yaz-proxy.
+
+YAZ proxy 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
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+YAZ proxy is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with YAZ proxy; see the file LICENSE. If not, write to the
+Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+ */
+
+#include <yaz/log.h>
+#include <yaz/diagbib1.h>
+#include "p2_backend.h"
+#include "p2_frontend.h"
+#include "p2_config.h"
+#include "p2_modules.h"
+
+using namespace yazpp_1;
+using namespace std;
+
+IP2_BackendSet::~IP2_BackendSet()
+{
+}
+
+IP2_Backend::~IP2_Backend()
+{
+
+}
+
+P2_Backend::P2_Backend(P2_ConfigTarget *cfg, IP2_Backend *backend_int)
+{
+ m_configTarget = new P2_ConfigTarget;
+ *m_configTarget = *cfg;
+ m_busy = false;
+ m_int = backend_int;
+}
+
+P2_Backend::~P2_Backend()
+{
+ delete m_configTarget;
+}
+
+P2_BackendResultSet::P2_BackendResultSet()
+{
+ m_int = 0;
+}
+
+P2_BackendResultSet::~P2_BackendResultSet()
+{
+ delete m_int;
+}
+
+P2_Backend *P2_Msg::select_backend(string db,
+ Yaz_Z_Query *query,
+ P2_BackendResultSet **bset)
+{
+ P2_Config *cfg = m_server->lockConfig();
+
+ // see if some target has done this query before
+
+ *bset = 0;
+ P2_Backend *backend = 0;
+
+ list<P2_Backend *>::const_iterator it;
+ for (it = m_server->m_backend_list.begin();
+ it != m_server->m_backend_list.end(); it++)
+ {
+ if ((*it)->m_busy)
+ continue;
+
+ if (db != (*it)->m_configTarget->m_virt_database)
+ continue;
+ backend = *it;
+
+ if (query)
+ {
+ list<P2_BackendResultSet *>::const_iterator is;
+ for (is = (*it)->m_resultSets.begin();
+ is != (*it)->m_resultSets.end(); is++)
+ {
+ if (query->match(&(*is)->m_query))
+ {
+ *bset = *is;
+ break;
+ }
+ }
+ }
+ if (bset)
+ break;
+ }
+ if (!backend)
+ {
+ P2_ConfigTarget *target_cfg = cfg->find_target(db);
+
+ if (!target_cfg)
+ {
+ yaz_log(YLOG_WARN, "No backend for database %s",
+ db.c_str());
+ }
+ else
+ {
+ P2_ModuleInterface0 *int0 =
+ reinterpret_cast<P2_ModuleInterface0 *>
+ (m_server->m_modules->get_interface(target_cfg->m_type.c_str(),
+ 0));
+ IP2_Backend *bint = 0;
+
+ if (int0)
+ bint = int0->create(target_cfg->m_target_address.c_str());
+
+ if (bint)
+ backend = new P2_Backend(target_cfg, bint);
+
+ if (backend)
+ m_server->m_backend_list.push_back(backend);
+ }
+ }
+ if (backend)
+ backend->m_busy = true;
+ m_server->unlockConfig();
+ return backend;
+}
+
+void P2_FrontResultSet::setQuery(Z_Query *z_query)
+{
+ m_query.set_Z_Query(z_query);
+}
+
+void P2_FrontResultSet::setDatabases(char **db, int num)
+{
+ m_db_list.clear();
+
+ int i;
+ for (i = 0; i<num; i++)
+ m_db_list.push_back(db[i]);
+}
+
+P2_FrontResultSet::P2_FrontResultSet(const char *id)
+{
+ m_resultSetId = id;
+}
+
+
+P2_FrontResultSet::~P2_FrontResultSet()
+{
+}
+
+P2_Msg::P2_Msg(GDU *gdu, P2_Frontend *front, P2_Server *server)
+{
+ m_front = front;
+ m_server = server;
+ m_output = 0;
+ m_gdu = gdu;
+ m_close_flag = 0;
+}
+
+P2_Msg::~P2_Msg()
+{
+ delete m_output;
+ delete m_gdu;
+}
+
+Z_APDU *P2_Msg::frontend_search_resultset(Z_APDU *z_gdu, ODR odr,
+ P2_FrontResultSet **rset)
+{
+ Z_SearchRequest *req = z_gdu->u.searchRequest;
+ list<P2_FrontResultSet *>::iterator it;
+ P2_FrontResultSet *s = 0;
+
+ string id = req->resultSetName;
+ for (it = m_front->m_resultSets.begin(); it != m_front->m_resultSets.end(); it++)
+ {
+ if ((*it)->m_resultSetId == id)
+ {
+ s = *it;
+ break;
+ }
+ }
+ if (s)
+ {
+ // result set already exists
+ *rset = s;
+ if (req->replaceIndicator && *req->replaceIndicator)
+ { // replace indicator true
+ s->setQuery(req->query);
+ s->setDatabases(req->databaseNames, req->num_databaseNames);
+ return 0;
+ }
+ Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
+ Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
+ apdu->u.searchResponse->records = rec;
+ rec->which = Z_Records_NSD;
+ rec->u.nonSurrogateDiagnostic =
+ zget_DefaultDiagFormat(
+ odr, YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
+ req->resultSetName);
+
+ return apdu;
+ }
+ // does not exist
+ s = new P2_FrontResultSet(req->resultSetName);
+ s->setQuery(req->query);
+ s->setDatabases(req->databaseNames, req->num_databaseNames);
+ m_front->m_resultSets.push_back(s);
+ *rset = s;
+ return 0;
+}
+
+Z_APDU *P2_Msg::frontend_search_apdu(Z_APDU *request_apdu, ODR odr)
+{
+ P2_FrontResultSet *rset;
+ Z_APDU *response_apdu = frontend_search_resultset(request_apdu, odr,
+ &rset);
+ if (response_apdu)
+ return response_apdu;
+
+ // no immediate error (yet)
+ size_t i;
+ for (i = 0; i<rset->m_db_list.size(); i++)
+ {
+ string db = rset->m_db_list[i];
+ P2_BackendResultSet *bset;
+ P2_Backend *b = select_backend(db, &rset->m_query, &bset);
+ if (!b)
+ {
+ Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
+ Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
+ apdu->u.searchResponse->records = rec;
+ rec->which = Z_Records_NSD;
+ rec->u.nonSurrogateDiagnostic =
+ zget_DefaultDiagFormat(
+ odr, YAZ_BIB1_DATABASE_UNAVAILABLE, db.c_str());
+ return apdu;
+ }
+ if (!bset)
+ { // new set
+ bset = new P2_BackendResultSet();
+
+ bset->m_query.set_Z_Query(request_apdu->u.searchRequest->query);
+ bset->m_db_list.push_back(db);
+
+ b->m_int->search(&bset->m_query, &bset->m_int, &bset->m_hit_count);
+ b->m_resultSets.push_back(bset);
+ }
+ else
+ {
+ bset->m_int->get(1, 1);
+ }
+ response_apdu = zget_APDU(odr, Z_APDU_searchResponse);
+ *response_apdu->u.searchResponse->resultCount = bset->m_hit_count;
+ b->m_busy = false;
+ }
+ if (!response_apdu)
+ {
+ Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
+ Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
+ apdu->u.searchResponse->records = rec;
+ rec->which = Z_Records_NSD;
+ rec->u.nonSurrogateDiagnostic =
+ zget_DefaultDiagFormat(odr, YAZ_BIB1_UNSUPP_SEARCH, 0);
+ return apdu;
+ }
+ return response_apdu;
+}
+
+Z_APDU *P2_Msg::frontend_present_resultset(Z_APDU *z_gdu, ODR odr,
+ P2_FrontResultSet **rset)
+{
+ Z_PresentRequest *req = z_gdu->u.presentRequest;
+ list<P2_FrontResultSet *>::iterator it;
+ P2_FrontResultSet *s = 0;
+
+ string id = req->resultSetId;
+ for (it = m_front->m_resultSets.begin(); it != m_front->m_resultSets.end(); it++)
+ {
+ if ((*it)->m_resultSetId == id)
+ {
+ s = *it;
+ break;
+ }
+ }
+ *rset = s;
+ if (s)
+ return 0; // fine result set exists
+
+ Z_APDU *apdu = zget_APDU(odr, Z_APDU_presentResponse);
+
+ Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
+ apdu->u.presentResponse->records = rec;
+ rec->which = Z_Records_NSD;
+ rec->u.nonSurrogateDiagnostic =
+ zget_DefaultDiagFormat(
+ odr,
+ YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
+ req->resultSetId);
+ return apdu;
+}
+
+Z_APDU *P2_Msg::frontend_present_apdu(Z_APDU *request_apdu, ODR odr)
+{
+ P2_FrontResultSet *rset;
+ Z_APDU *response_apdu = frontend_present_resultset(request_apdu, odr,
+ &rset);
+ if (response_apdu)
+ return response_apdu;
+ return zget_APDU(odr, Z_APDU_presentResponse);
+}
+
+IMsg_Thread *P2_Msg::handle()
+{
+ ODR odr = odr_createmem(ODR_ENCODE);
+ yaz_log(YLOG_LOG, "P2_Msg:handle begin");
+ Z_GDU *request_gdu = m_gdu->get();
+
+ if (request_gdu->which == Z_GDU_Z3950)
+ {
+ Z_APDU *request_apdu = request_gdu->u.z3950;
+ Z_APDU *response_apdu = 0;
+ switch(request_apdu->which)
+ {
+ case Z_APDU_initRequest:
+ response_apdu = zget_APDU(odr, Z_APDU_initResponse);
+ ODR_MASK_SET(response_apdu->u.initResponse->options, Z_Options_triggerResourceCtrl);
+ ODR_MASK_SET(response_apdu->u.initResponse->options, Z_Options_search);
+ ODR_MASK_SET(response_apdu->u.initResponse->options, Z_Options_present);
+ ODR_MASK_SET(response_apdu->u.initResponse->options, Z_Options_namedResultSets);
+ break;
+ case Z_APDU_searchRequest:
+ response_apdu = frontend_search_apdu(request_apdu, odr);
+ break;
+ case Z_APDU_presentRequest:
+ response_apdu = frontend_present_apdu(request_apdu, odr);
+ break;
+ case Z_APDU_triggerResourceControlRequest:
+ break;
+ default:
+ response_apdu = zget_APDU(odr, Z_APDU_close);
+ m_close_flag = 1;
+ break;
+ }
+ if (response_apdu)
+ m_output = new GDU(response_apdu);
+ }
+ yaz_log(YLOG_LOG, "P2_Msg:handle end");
+ odr_destroy(odr);
+ return this;
+}
+
+void P2_Msg::result()
+{
+ m_front->m_no_requests--;
+ if (!m_front->m_delete_flag)
+ {
+ if (m_output)
+ {
+ int len;
+ m_front->send_GDU(m_output->get(), &len);
+ }
+ if (m_close_flag)
+ {
+ m_front->close();
+ m_front->m_delete_flag = 1;
+ }
+ }
+ if (m_front->m_delete_flag && m_front->m_no_requests == 0)
+ delete m_front;
+ delete this;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
projects / yazproxy-moved-to-github.git / blobdiff