src/session.c

   1 /* This file is part of Pazpar2.
   2    Copyright (C) 2006-2013 Index Data
   3
   4 Pazpar2 is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17
  18 */
  19
  20 /** \file session.c
  21     \brief high-level logic; mostly user sessions and settings
  22 */
  23
  24 #if HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <time.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #if HAVE_SYS_TIME_H
  33 #include <sys/time.h>
  34 #endif
  35 #if HAVE_UNISTD_H
  36 #include <unistd.h>
  37 #endif
  38 #ifdef WIN32
  39 #include <windows.h>
  40 #endif
  41 #include <signal.h>
  42 #include <ctype.h>
  43 #include <assert.h>
  44 #include <math.h>
  45
  46 #include <yaz/marcdisp.h>
  47 #include <yaz/comstack.h>
  48 #include <yaz/tcpip.h>
  49 #include <yaz/proto.h>
  50 #include <yaz/readconf.h>
  51 #include <yaz/pquery.h>
  52 #include <yaz/otherinfo.h>
  53 #include <yaz/yaz-util.h>
  54 #include <yaz/nmem.h>
  55 #include <yaz/query-charset.h>
  56 #include <yaz/querytowrbuf.h>
  57 #include <yaz/oid_db.h>
  58 #include <yaz/snprintf.h>
  59
  60 #define USE_TIMING 1
  61 #if USE_TIMING
  62 #include <yaz/timing.h>
  63 #endif
  64
  65 #include "ppmutex.h"
  66 #include "parameters.h"
  67 #include "session.h"
  68 #include "eventl.h"
  69 #include "http.h"
  70 #include "termlists.h"
  71 #include "reclists.h"
  72 #include "relevance.h"
  73 #include "database.h"
  74 #include "client.h"
  75 #include "settings.h"
  76 #include "normalize7bit.h"
  77
  78 #include <libxml/tree.h>
  79
  80 #define MAX_CHUNK 15
  81
  82 #define MAX(a,b) ((a)>(b)?(a):(b))
  83
  84 // Note: Some things in this structure will eventually move to configuration
  85 struct parameters global_parameters =
  86 {
  87     0,   // dump_records
  88     0,   // debug_mode
  89     0,   // predictable sessions
  90 };
  91
  92 struct client_list {
  93     struct client *client;
  94     struct client_list *next;
  95 };
  96
  97 /* session counting (1) , disable client counting (0) */
  98 static YAZ_MUTEX g_session_mutex = 0;
  99 static int no_sessions = 0;
 100 static int no_session_total = 0;
 101
 102 static int session_use(int delta)
 103 {
 104     int sessions;
 105     if (!g_session_mutex)
 106         yaz_mutex_create(&g_session_mutex);
 107     yaz_mutex_enter(g_session_mutex);
 108     no_sessions += delta;
 109     if (delta > 0)
 110         no_session_total += delta;
 111     sessions = no_sessions;
 112     yaz_mutex_leave(g_session_mutex);
 113     yaz_log(YLOG_DEBUG, "%s sessions=%d", delta == 0 ? "" : (delta > 0 ? "INC" : "DEC"), no_sessions);
 114     return sessions;
 115 }
 116
 117 int sessions_count(void)
 118 {
 119     return session_use(0);
 120 }
 121
 122 int session_count_total(void)
 123 {
 124     int total = 0;
 125     if (!g_session_mutex)
 126         return 0;
 127     yaz_mutex_enter(g_session_mutex);
 128     total = no_session_total;
 129     yaz_mutex_leave(g_session_mutex);
 130     return total;
 131 }
 132
 133 static void log_xml_doc(xmlDoc *doc)
 134 {
 135     FILE *lf = yaz_log_file();
 136     xmlChar *result = 0;
 137     int len = 0;
 138 #if LIBXML_VERSION >= 20600
 139     xmlDocDumpFormatMemory(doc, &result, &len, 1);
 140 #else
 141     xmlDocDumpMemory(doc, &result, &len);
 142 #endif
 143     if (lf && len)
 144     {
 145         (void) fwrite(result, 1, len, lf);
 146         fprintf(lf, "\n");
 147     }
 148     xmlFree(result);
 149 }
 150
 151 static void session_enter(struct session *s, const char *caller)
 152 {
 153     if (caller)
 154         session_log(s, YLOG_DEBUG, "Session lock by %s", caller);
 155     yaz_mutex_enter(s->session_mutex);
 156 }
 157
 158 static void session_leave(struct session *s, const char *caller)
 159 {
 160     yaz_mutex_leave(s->session_mutex);
 161     if (caller)
 162         session_log(s, YLOG_DEBUG, "Session unlock by %s", caller);
 163 }
 164
 165 static void session_normalize_facet(struct session *s, const char *type,
 166                                     const char *value,
 167                                     WRBUF display_wrbuf,
 168                                     WRBUF facet_wrbuf)
 169 {
 170     struct conf_service *service = s->service;
 171     pp2_charset_token_t prt;
 172     const char *facet_component;
 173     int i;
 174     const char *icu_chain_id = 0;
 175
 176     for (i = 0; i < service->num_metadata; i++)
 177         if (!strcmp((service->metadata + i)->name, type))
 178             icu_chain_id = (service->metadata + i)->facetrule;
 179     if (!icu_chain_id)
 180         icu_chain_id = "facet";
 181     prt = pp2_charset_token_create(service->charsets, icu_chain_id);
 182     if (!prt)
 183     {
 184         session_log(s, YLOG_FATAL,
 185                     "Unknown ICU chain '%s' for facet of type '%s'",
 186                 icu_chain_id, type);
 187         wrbuf_destroy(facet_wrbuf);
 188         wrbuf_destroy(display_wrbuf);
 189         return;
 190     }
 191     pp2_charset_token_first(prt, value, 0);
 192     while ((facet_component = pp2_charset_token_next(prt)))
 193     {
 194         const char *display_component;
 195         if (*facet_component)
 196         {
 197             if (wrbuf_len(facet_wrbuf))
 198                 wrbuf_puts(facet_wrbuf, " ");
 199             wrbuf_puts(facet_wrbuf, facet_component);
 200         }
 201         display_component = pp2_get_display(prt);
 202         if (display_component)
 203         {
 204             if (wrbuf_len(display_wrbuf))
 205                 wrbuf_puts(display_wrbuf, " ");
 206             wrbuf_puts(display_wrbuf, display_component);
 207         }
 208     }
 209     pp2_charset_token_destroy(prt);
 210 }
 211
 212 void add_facet(struct session *s, const char *type, const char *value, int count)
 213 {
 214     WRBUF facet_wrbuf = wrbuf_alloc();
 215     WRBUF display_wrbuf = wrbuf_alloc();
 216
 217     session_normalize_facet(s, type, value, display_wrbuf, facet_wrbuf);
 218
 219     if (wrbuf_len(facet_wrbuf))
 220     {
 221         int i;
 222         for (i = 0; i < s->num_termlists; i++)
 223             if (!strcmp(s->termlists[i].name, type))
 224                 break;
 225         if (i == s->num_termlists)
 226         {
 227             if (i == SESSION_MAX_TERMLISTS)
 228             {
 229                 session_log(s, YLOG_FATAL, "Too many termlists");
 230                 wrbuf_destroy(facet_wrbuf);
 231                 wrbuf_destroy(display_wrbuf);
 232                 return;
 233             }
 234
 235             s->termlists[i].name = nmem_strdup(s->nmem, type);
 236             s->termlists[i].termlist = termlist_create(s->nmem);
 237             s->num_termlists = i + 1;
 238         }
 239
 240 #if 0
 241         session_log(s, YLOG_LOG, "Facets for %s: %s norm:%s (%d)", type, value, wrbuf_cstr(facet_wrbuf), count);
 242 #endif
 243         termlist_insert(s->termlists[i].termlist, wrbuf_cstr(display_wrbuf),
 244                         wrbuf_cstr(facet_wrbuf), count);
 245     }
 246     wrbuf_destroy(facet_wrbuf);
 247     wrbuf_destroy(display_wrbuf);
 248 }
 249
 250 static xmlDoc *record_to_xml(struct session *se,
 251                              struct session_database *sdb, const char *rec)
 252 {
 253     struct database *db = sdb->database;
 254     xmlDoc *rdoc = 0;
 255
 256     rdoc = xmlParseMemory(rec, strlen(rec));
 257
 258     if (!rdoc)
 259     {
 260         session_log(se, YLOG_WARN, "Non-wellformed XML");
 261         return 0;
 262     }
 263
 264     if (global_parameters.dump_records)
 265     {
 266         session_log(se, YLOG_LOG, "Un-normalized record from %s", db->id);
 267         log_xml_doc(rdoc);
 268     }
 269
 270     return rdoc;
 271 }
 272
 273 #define MAX_XSLT_ARGS 16
 274
 275 // Add static values from session database settings if applicable
 276 static void insert_settings_parameters(struct session_database *sdb,
 277                                        struct conf_service *service,
 278                                        char **parms,
 279                                        NMEM nmem)
 280 {
 281     int i;
 282     int nparms = 0;
 283     int offset = 0;
 284
 285     for (i = 0; i < service->num_metadata; i++)
 286     {
 287         struct conf_metadata *md = &service->metadata[i];
 288         int setting;
 289
 290         if (md->setting == Metadata_setting_parameter &&
 291             (setting = settings_lookup_offset(service, md->name)) >= 0)
 292         {
 293             const char *val = session_setting_oneval(sdb, setting);
 294             if (val && nparms < MAX_XSLT_ARGS)
 295             {
 296                 char *buf;
 297                 int len = strlen(val);
 298                 buf = nmem_malloc(nmem, len + 3);
 299                 buf[0] = '\'';
 300                 strcpy(buf + 1, val);
 301                 buf[len+1] = '\'';
 302                 buf[len+2] = '\0';
 303                 parms[offset++] = md->name;
 304                 parms[offset++] = buf;
 305                 nparms++;
 306             }
 307         }
 308     }
 309     parms[offset] = 0;
 310 }
 311
 312 // Add static values from session database settings if applicable
 313 static void insert_settings_values(struct session_database *sdb, xmlDoc *doc,
 314     struct conf_service *service)
 315 {
 316     int i;
 317
 318     for (i = 0; i < service->num_metadata; i++)
 319     {
 320         struct conf_metadata *md = &service->metadata[i];
 321         int offset;
 322
 323         if (md->setting == Metadata_setting_postproc &&
 324             (offset = settings_lookup_offset(service, md->name)) >= 0)
 325         {
 326             const char *val = session_setting_oneval(sdb, offset);
 327             if (val)
 328             {
 329                 xmlNode *r = xmlDocGetRootElement(doc);
 330                 xmlNode *n = xmlNewTextChild(r, 0, (xmlChar *) "metadata",
 331                                              (xmlChar *) val);
 332                 xmlSetProp(n, (xmlChar *) "type", (xmlChar *) md->name);
 333             }
 334         }
 335     }
 336 }
 337
 338 static xmlDoc *normalize_record(struct session *se,
 339                                 struct session_database *sdb,
 340                                 struct conf_service *service,
 341                                 const char *rec, NMEM nmem)
 342 {
 343     xmlDoc *rdoc = record_to_xml(se, sdb, rec);
 344
 345     if (rdoc)
 346     {
 347         char *parms[MAX_XSLT_ARGS*2+1];
 348
 349         insert_settings_parameters(sdb, service, parms, nmem);
 350
 351         if (normalize_record_transform(sdb->map, &rdoc, (const char **)parms))
 352         {
 353             session_log(se, YLOG_WARN, "Normalize failed");
 354         }
 355         else
 356         {
 357             insert_settings_values(sdb, rdoc, service);
 358
 359             if (global_parameters.dump_records)
 360             {
 361                 session_log(se, YLOG_LOG, "Normalized record from %s",
 362                             sdb->database->id);
 363                 log_xml_doc(rdoc);
 364             }
 365         }
 366     }
 367     return rdoc;
 368 }
 369
 370 void session_settings_dump(struct session *se,
 371                            struct session_database *db,
 372                            WRBUF w)
 373 {
 374     if (db->settings)
 375     {
 376         int i, num = db->num_settings;
 377         for (i = 0; i < num; i++)
 378         {
 379             struct setting *s = db->settings[i];
 380             for (;s ; s = s->next)
 381             {
 382                 wrbuf_puts(w, "<set name=\"");
 383                 wrbuf_xmlputs(w, s->name);
 384                 wrbuf_puts(w, "\" value=\"");
 385                 wrbuf_xmlputs(w, s->value);
 386                 wrbuf_puts(w, "\"/>");
 387             }
 388             if (db->settings[i])
 389                 wrbuf_puts(w, "\n");
 390         }
 391     }
 392 }
 393
 394 // Retrieve first defined value for 'name' for given database.
 395 // Will be extended to take into account user associated with session
 396 const char *session_setting_oneval(struct session_database *db, int offset)
 397 {
 398     if (offset >= db->num_settings || !db->settings[offset])
 399         return "";
 400     return db->settings[offset]->value;
 401 }
 402
 403 // Prepare XSLT stylesheets for record normalization
 404 // Structures are allocated on the session_wide nmem to avoid having
 405 // to recompute this for every search. This would lead
 406 // to leaking if a single session was to repeatedly change the PZ_XSLT
 407 // setting. However, this is not a realistic use scenario.
 408 static int prepare_map(struct session *se, struct session_database *sdb)
 409 {
 410     if (sdb->settings && !sdb->map)
 411     {
 412         const char *s;
 413
 414         if (sdb->settings[PZ_XSLT] &&
 415             (s = session_setting_oneval(sdb, PZ_XSLT)))
 416         {
 417             char auto_stylesheet[256];
 418
 419             if (!strcmp(s, "auto"))
 420             {
 421                 const char *request_syntax = session_setting_oneval(
 422                     sdb, PZ_REQUESTSYNTAX);
 423                 if (request_syntax)
 424                 {
 425                     char *cp;
 426                     yaz_snprintf(auto_stylesheet, sizeof(auto_stylesheet),
 427                                  "%s.xsl", request_syntax);
 428                     for (cp = auto_stylesheet; *cp; cp++)
 429                     {
 430                         /* deliberately only consider ASCII */
 431                         if (*cp > 32 && *cp < 127)
 432                             *cp = tolower(*cp);
 433                     }
 434                     s = auto_stylesheet;
 435                 }
 436                 else
 437                 {
 438                     session_log(se, YLOG_WARN,
 439                                 "No pz:requestsyntax for auto stylesheet");
 440                 }
 441             }
 442             sdb->map = normalize_cache_get(se->normalize_cache,
 443                                            se->service, s);
 444             if (!sdb->map)
 445                 return -1;
 446         }
 447     }
 448     return 0;
 449 }
 450
 451 // called if watch should be removed because http_channel is to be destroyed
 452 static void session_watch_cancel(void *data, struct http_channel *c,
 453                                  void *data2)
 454 {
 455     struct session_watchentry *ent = data;
 456
 457     ent->fun = 0;
 458     ent->data = 0;
 459     ent->obs = 0;
 460 }
 461
 462 // set watch. Returns 0=OK, -1 if watch is already set
 463 int session_set_watch(struct session *s, int what,
 464                       session_watchfun fun, void *data,
 465                       struct http_channel *chan)
 466 {
 467     int ret;
 468     session_enter(s, "session_set_watch");
 469     if (s->watchlist[what].fun)
 470         ret = -1;
 471     else
 472     {
 473
 474         s->watchlist[what].fun = fun;
 475         s->watchlist[what].data = data;
 476         s->watchlist[what].obs = http_add_observer(chan, &s->watchlist[what],
 477                                                    session_watch_cancel);
 478         ret = 0;
 479     }
 480     session_leave(s, "session_set_watch");
 481     return ret;
 482 }
 483
 484 void session_alert_watch(struct session *s, int what)
 485 {
 486     assert(s);
 487     session_enter(s, "session_alert_watch");
 488     if (s->watchlist[what].fun)
 489     {
 490         /* our watch is no longer associated with http_channel */
 491         void *data;
 492         session_watchfun fun;
 493
 494         http_remove_observer(s->watchlist[what].obs);
 495         fun  = s->watchlist[what].fun;
 496         data = s->watchlist[what].data;
 497
 498         /* reset watch before fun is invoked - in case fun wants to set
 499            it again */
 500         s->watchlist[what].fun = 0;
 501         s->watchlist[what].data = 0;
 502         s->watchlist[what].obs = 0;
 503
 504         session_leave(s, "session_alert_watch");
 505         session_log(s, YLOG_DEBUG,
 506                     "Alert Watch: %d calling function: %p", what, fun);
 507         fun(data);
 508     }
 509     else
 510         session_leave(s,"session_alert_watch");
 511 }
 512
 513 //callback for grep_databases
 514 static void select_targets_callback(struct session *se,
 515                                     struct session_database *db)
 516 {
 517     struct client *cl;
 518     struct client_list *l;
 519
 520     for (l = se->clients_cached; l; l = l->next)
 521         if (client_get_database(l->client) == db)
 522             break;
 523
 524     if (l)
 525         cl = l->client;
 526     else
 527     {
 528         cl = client_create(db->database->id);
 529         client_set_database(cl, db);
 530
 531         l = xmalloc(sizeof(*l));
 532         l->client = cl;
 533         l->next = se->clients_cached;
 534         se->clients_cached = l;
 535     }
 536     /* set session always. If may be 0 if client is not active */
 537     client_set_session(cl, se);
 538
 539     l = xmalloc(sizeof(*l));
 540     l->client = cl;
 541     l->next = se->clients_active;
 542     se->clients_active = l;
 543 }
 544
 545 static void session_reset_active_clients(struct session *se,
 546                                          struct client_list *new_list)
 547 {
 548     struct client_list *l;
 549
 550     session_enter(se, "session_reset_active_clients");
 551     l = se->clients_active;
 552     se->clients_active = new_list;
 553     session_leave(se, "session_reset_active_clients");
 554
 555     while (l)
 556     {
 557         struct client_list *l_next = l->next;
 558
 559         client_lock(l->client);
 560         client_set_session(l->client, 0); /* mark client inactive */
 561         client_unlock(l->client);
 562
 563         xfree(l);
 564         l = l_next;
 565     }
 566 }
 567
 568 static void session_remove_cached_clients(struct session *se)
 569 {
 570     struct client_list *l;
 571
 572     session_reset_active_clients(se, 0);
 573
 574     session_enter(se, "session_remove_cached_clients");
 575     l = se->clients_cached;
 576     se->clients_cached = 0;
 577     session_leave(se, "session_remove_cached_clients");
 578
 579     while (l)
 580     {
 581         struct client_list *l_next = l->next;
 582         client_lock(l->client);
 583         client_set_session(l->client, 0);
 584         client_set_database(l->client, 0);
 585         client_unlock(l->client);
 586         client_destroy(l->client);
 587         xfree(l);
 588         l = l_next;
 589     }
 590 }
 591
 592 // Associates a set of clients with a session;
 593 // Note: Session-databases represent databases with per-session
 594 // setting overrides
 595 static int select_targets(struct session *se, const char *filter)
 596 {
 597     return session_grep_databases(se, filter, select_targets_callback);
 598 }
 599
 600 int session_active_clients(struct session *s)
 601 {
 602     struct client_list *l;
 603     int res = 0;
 604
 605     for (l = s->clients_active; l; l = l->next)
 606         if (client_is_active(l->client))
 607             res++;
 608
 609     return res;
 610 }
 611
 612 int session_is_preferred_clients_ready(struct session *s)
 613 {
 614     struct client_list *l;
 615     int res = 0;
 616
 617     for (l = s->clients_active; l; l = l->next)
 618         if (client_is_active_preferred(l->client))
 619             res++;
 620     session_log(s, YLOG_DEBUG, "Has %d active preferred clients.", res);
 621     return res == 0;
 622 }
 623
 624 static void session_clear_set(struct session *se, struct reclist_sortparms *sp)
 625 {
 626     reclist_destroy(se->reclist);
 627     if (nmem_total(se->nmem))
 628         session_log(se, YLOG_DEBUG, "NMEN operation usage %zd",
 629                     nmem_total(se->nmem));
 630     nmem_reset(se->nmem);
 631     se->total_records = se->total_merged = 0;
 632     se->num_termlists = 0;
 633
 634     relevance_clear(se->relevance);
 635
 636     /* reset list of sorted results and clear to relevance search */
 637     se->sorted_results = nmem_malloc(se->nmem, sizeof(*se->sorted_results));
 638     se->sorted_results->name = nmem_strdup(se->nmem, sp->name);
 639     se->sorted_results->increasing = sp->increasing;
 640     se->sorted_results->type = sp->type;
 641     se->sorted_results->next = 0;
 642
 643     session_log(se, YLOG_DEBUG, "clear_set session_sort: field=%s increasing=%d type=%d configured",
 644             sp->name, sp->increasing, sp->type);
 645
 646     se->reclist = reclist_create(se->nmem);
 647 }
 648
 649 static void session_sort_unlocked(struct session *se,
 650                                   struct reclist_sortparms *sp,
 651                                   const char *mergekey)
 652 {
 653     struct reclist_sortparms *sr;
 654     struct client_list *l;
 655     const char *field = sp->name;
 656     int increasing = sp->increasing;
 657     int type  = sp->type;
 658     int clients_research = 0;
 659
 660     session_log(se, YLOG_DEBUG, "session_sort field=%s increasing=%d type=%d",
 661                 field, increasing, type);
 662
 663     if (!mergekey ||
 664         (se->mergekey && !strcmp(se->mergekey, mergekey)))
 665     {
 666         /* mergekey unchanged.. */
 667         /* see if we already have sorted for this criteria */
 668         for (sr = se->sorted_results; sr; sr = sr->next)
 669         {
 670             if (!reclist_sortparms_cmp(sr, sp))
 671                 break;
 672         }
 673         if (sr)
 674         {
 675             session_log(se, YLOG_DEBUG, "search_sort: field=%s increasing=%d type=%d already fetched",
 676                         field, increasing, type);
 677             return;
 678         }
 679         session_log(se, YLOG_DEBUG, "search_sort: field=%s increasing=%d type=%d must fetch",
 680                     field, increasing, type);
 681     }
 682     else
 683     {
 684         /* new mergekey must research/reingest anyway */
 685         assert(mergekey);
 686         xfree(se->mergekey);
 687         se->mergekey = *mergekey ? xstrdup(mergekey) : 0;
 688         clients_research = 1;
 689
 690         session_log(se, YLOG_DEBUG, "search_sort: new mergekey = %s",
 691                     mergekey);
 692     }
 693
 694     // We need to reset reclist on every sort that changes the records, not just for position
 695     // So if just one client requires new searching, we need to clear set.
 696     // Ask each of the client if sorting requires re-search due to native sort
 697     // If it does it will require us to
 698     for (l = se->clients_active; l; l = l->next)
 699     {
 700         struct client *cl = l->client;
 701         // Assume no re-search is required.
 702         client_parse_init(cl, 1);
 703         clients_research += client_parse_sort(cl, sp);
 704     }
 705     if (clients_research) {
 706         session_log(se, YLOG_DEBUG,
 707                     "Reset results due to %d clients researching",
 708                     clients_research);
 709         session_clear_set(se, sp);
 710     }
 711     else {
 712         // A new sorting based on same record set
 713         sr = nmem_malloc(se->nmem, sizeof(*sr));
 714         sr->name = nmem_strdup(se->nmem, field);
 715         sr->increasing = increasing;
 716         sr->type = type;
 717         sr->next = se->sorted_results;
 718         se->sorted_results = sr;
 719         session_log(se, YLOG_DEBUG, "No research/ingesting done");
 720         return ;
 721     }
 722     session_log(se, YLOG_DEBUG, "Re- search/ingesting for clients due to change in sort order");
 723
 724     for (l = se->clients_active; l; l = l->next)
 725     {
 726         struct client *cl = l->client;
 727         if (client_get_state(cl) == Client_Connecting ||
 728             client_get_state(cl) == Client_Idle ||
 729             client_get_state(cl) == Client_Working) {
 730             client_start_search(cl);
 731         }
 732         else {
 733             session_log(se, YLOG_DEBUG,
 734                         "Client %s: No re-start/ingest in show. Wrong client state: %d",
 735                         client_get_id(cl), client_get_state(cl));
 736         }
 737
 738     }
 739 }
 740
 741 void session_sort(struct session *se, struct reclist_sortparms *sp,
 742                   const char *mergekey)
 743 {
 744     //session_enter(se, "session_sort");
 745     session_sort_unlocked(se, sp, mergekey);
 746     //session_leave(se, "session_sort");
 747 }
 748
 749
 750 enum pazpar2_error_code session_search(struct session *se,
 751                                        const char *query,
 752                                        const char *startrecs,
 753                                        const char *maxrecs,
 754                                        const char *filter,
 755                                        const char *limit,
 756                                        const char **addinfo,
 757                                        struct reclist_sortparms *sp,
 758                                        const char *mergekey)
 759 {
 760     int live_channels = 0;
 761     int no_working = 0;
 762     int no_failed_query = 0;
 763     int no_failed_limit = 0;
 764     struct client_list *l, *l0;
 765
 766     session_log(se, YLOG_DEBUG, "Search");
 767
 768     *addinfo = 0;
 769
 770     if (se->settings_modified) {
 771         session_remove_cached_clients(se);
 772     }
 773     else
 774         session_reset_active_clients(se, 0);
 775
 776     session_enter(se, "session_search");
 777     se->settings_modified = 0;
 778
 779     if (mergekey)
 780     {
 781         xfree(se->mergekey);
 782         se->mergekey = *mergekey ? xstrdup(mergekey) : 0;
 783     }
 784
 785     session_clear_set(se, sp);
 786     relevance_destroy(&se->relevance);
 787
 788     live_channels = select_targets(se, filter);
 789     if (!live_channels)
 790     {
 791         session_leave(se, "session_search");
 792         return PAZPAR2_NO_TARGETS;
 793     }
 794
 795     facet_limits_destroy(se->facet_limits);
 796     se->facet_limits = facet_limits_create(limit);
 797     if (!se->facet_limits)
 798     {
 799         *addinfo = "limit";
 800         session_leave(se, "session_search");
 801         return PAZPAR2_MALFORMED_PARAMETER_VALUE;
 802     }
 803
 804     l0 = se->clients_active;
 805     se->clients_active = 0;
 806     session_leave(se, "session_search");
 807
 808     for (l = l0; l; l = l->next)
 809     {
 810         int parse_ret;
 811         struct client *cl = l->client;
 812         client_parse_init(cl, 1);
 813         if (prepare_map(se, client_get_database(cl)) < 0)
 814             continue;
 815
 816         parse_ret = client_parse_query(cl, query, se->facet_limits);
 817         if (parse_ret == -1)
 818             no_failed_query++;
 819         else if (parse_ret == -2)
 820             no_failed_limit++;
 821         else if (parse_ret < 0)
 822             no_working++; /* other error, such as bad CCL map */
 823         else
 824         {
 825             client_parse_range(cl, startrecs, maxrecs);
 826             client_parse_sort(cl, sp);
 827             client_start_search(cl);
 828             no_working++;
 829         }
 830     }
 831     session_reset_active_clients(se, l0);
 832
 833     if (no_working == 0)
 834     {
 835         if (no_failed_query > 0)
 836         {
 837             *addinfo = "query";
 838             return PAZPAR2_MALFORMED_PARAMETER_VALUE;
 839         }
 840         else if (no_failed_limit > 0)
 841         {
 842             *addinfo = "limit";
 843             return PAZPAR2_MALFORMED_PARAMETER_VALUE;
 844         }
 845         else
 846             return PAZPAR2_NO_TARGETS;
 847     }
 848     session_log(se, YLOG_LOG, "session_start_search done");
 849     return PAZPAR2_NO_ERROR;
 850 }
 851
 852 // Creates a new session_database object for a database
 853 static void session_init_databases_fun(void *context, struct database *db)
 854 {
 855     struct session *se = (struct session *) context;
 856     struct session_database *new = nmem_malloc(se->session_nmem, sizeof(*new));
 857     int i;
 858
 859     new->database = db;
 860
 861     new->map = 0;
 862     assert(db->settings);
 863     new->settings = nmem_malloc(se->session_nmem,
 864                                 sizeof(struct settings *) * db->num_settings);
 865     new->num_settings = db->num_settings;
 866     for (i = 0; i < db->num_settings; i++)
 867     {
 868         struct setting *setting = db->settings[i];
 869         new->settings[i] = setting;
 870     }
 871     new->next = se->databases;
 872     se->databases = new;
 873 }
 874
 875 // Doesn't free memory associated with sdb -- nmem takes care of that
 876 static void session_database_destroy(struct session_database *sdb)
 877 {
 878     sdb->map = 0;
 879 }
 880
 881 // Initialize session_database list -- this represents this session's view
 882 // of the database list -- subject to modification by the settings ws command
 883 void session_init_databases(struct session *se)
 884 {
 885     se->databases = 0;
 886     predef_grep_databases(se, se->service, session_init_databases_fun);
 887 }
 888
 889 // Probably session_init_databases_fun should be refactored instead of
 890 // called here.
 891 static struct session_database *load_session_database(struct session *se,
 892                                                       char *id)
 893 {
 894     struct database *db = new_database_inherit_settings(id, se->session_nmem, se->service->settings);
 895     session_init_databases_fun((void*) se, db);
 896
 897     // New sdb is head of se->databases list
 898     return se->databases;
 899 }
 900
 901 // Find an existing session database. If not found, load it
 902 static struct session_database *find_session_database(struct session *se,
 903                                                       char *id)
 904 {
 905     struct session_database *sdb;
 906
 907     for (sdb = se->databases; sdb; sdb = sdb->next)
 908         if (!strcmp(sdb->database->id, id))
 909             return sdb;
 910     return load_session_database(se, id);
 911 }
 912
 913 // Apply a session override to a database
 914 void session_apply_setting(struct session *se, char *dbname, char *setting,
 915                            char *value)
 916 {
 917     struct session_database *sdb = find_session_database(se, dbname);
 918     struct conf_service *service = se->service;
 919     struct setting *new = nmem_malloc(se->session_nmem, sizeof(*new));
 920     int offset = settings_create_offset(service, setting);
 921
 922     expand_settings_array(&sdb->settings, &sdb->num_settings, offset,
 923                           se->session_nmem);
 924     new->precedence = 0;
 925     new->target = dbname;
 926     new->name = setting;
 927     new->value = value;
 928     new->next = sdb->settings[offset];
 929     sdb->settings[offset] = new;
 930
 931     se->settings_modified = 1;
 932
 933     // Force later recompute of settings-driven data structures
 934     // (happens when a search starts and client connections are prepared)
 935     switch (offset)
 936     {
 937     case PZ_XSLT:
 938         if (sdb->map)
 939         {
 940             sdb->map = 0;
 941         }
 942         break;
 943     }
 944 }
 945
 946 void session_destroy(struct session *se)
 947 {
 948     struct session_database *sdb;
 949     session_log(se, YLOG_DEBUG, "Destroying");
 950     session_use(-1);
 951     session_remove_cached_clients(se);
 952
 953     for (sdb = se->databases; sdb; sdb = sdb->next)
 954         session_database_destroy(sdb);
 955     normalize_cache_destroy(se->normalize_cache);
 956     relevance_destroy(&se->relevance);
 957     reclist_destroy(se->reclist);
 958     xfree(se->mergekey);
 959     if (nmem_total(se->nmem))
 960         session_log(se, YLOG_DEBUG, "NMEN operation usage %zd", nmem_total(se->nmem));
 961     if (nmem_total(se->session_nmem))
 962         session_log(se, YLOG_DEBUG, "NMEN session usage %zd", nmem_total(se->session_nmem));
 963     facet_limits_destroy(se->facet_limits);
 964     nmem_destroy(se->nmem);
 965     service_destroy(se->service);
 966     yaz_mutex_destroy(&se->session_mutex);
 967 }
 968
 969 size_t session_get_memory_status(struct session *session) {
 970     size_t session_nmem;
 971     if (session == 0)
 972         return 0;
 973     session_enter(session, "session_get_memory_status");
 974     session_nmem = nmem_total(session->nmem);
 975     session_leave(session, "session_get_memory_status");
 976     return session_nmem;
 977 }
 978
 979
 980 struct session *new_session(NMEM nmem, struct conf_service *service,
 981                             unsigned session_id)
 982 {
 983     int i;
 984     struct session *session = nmem_malloc(nmem, sizeof(*session));
 985
 986     char tmp_str[50];
 987
 988     sprintf(tmp_str, "session#%u", session_id);
 989
 990     session->session_id = session_id;
 991     session_log(session, YLOG_DEBUG, "New");
 992     session->service = service;
 993     session->relevance = 0;
 994     session->total_records = 0;
 995     session->number_of_warnings_unknown_elements = 0;
 996     session->number_of_warnings_unknown_metadata = 0;
 997     session->num_termlists = 0;
 998     session->reclist = reclist_create(nmem);
 999     session->clients_active = 0;
1000     session->clients_cached = 0;
1001     session->settings_modified = 0;
1002     session->session_nmem = nmem;
1003     session->nmem = nmem_create();
1004     session->databases = 0;
1005     session->sorted_results = 0;
1006     session->facet_limits = 0;
1007     session->mergekey = 0;
1008
1009     for (i = 0; i <= SESSION_WATCH_MAX; i++)
1010     {
1011         session->watchlist[i].data = 0;
1012         session->watchlist[i].fun = 0;
1013     }
1014     session->normalize_cache = normalize_cache_create();
1015     session->session_mutex = 0;
1016     pazpar2_mutex_create(&session->session_mutex, tmp_str);
1017     session_use(1);
1018     return session;
1019 }
1020
1021 const char * client_get_suggestions_xml(struct client *cl, WRBUF wrbuf);
1022
1023 static struct hitsbytarget *hitsbytarget_nb(struct session *se,
1024                                             int *count, NMEM nmem)
1025 {
1026     struct hitsbytarget *res = 0;
1027     struct client_list *l;
1028     size_t sz = 0;
1029
1030     for (l = se->clients_active; l; l = l->next)
1031         sz++;
1032
1033     res = nmem_malloc(nmem, sizeof(*res) * sz);
1034     *count = 0;
1035     for (l = se->clients_active; l; l = l->next)
1036     {
1037         struct client *cl = l->client;
1038         WRBUF w = wrbuf_alloc();
1039         const char *name = session_setting_oneval(client_get_database(cl),
1040                                                   PZ_NAME);
1041
1042         res[*count].id = client_get_id(cl);
1043         res[*count].name = *name ? name : "Unknown";
1044         res[*count].hits = client_get_hits(cl);
1045         res[*count].approximation = client_get_approximation(cl);
1046         res[*count].records = client_get_num_records(cl);
1047         res[*count].filtered = client_get_num_records_filtered(cl);
1048         res[*count].diagnostic =
1049             client_get_diagnostic(cl, &res[*count].message,
1050                                   &res[*count].addinfo);
1051         res[*count].state = client_get_state_str(cl);
1052         res[*count].connected  = client_get_connection(cl) ? 1 : 0;
1053         session_settings_dump(se, client_get_database(cl), w);
1054         res[*count].settings_xml = nmem_strdup(nmem, wrbuf_cstr(w));
1055         wrbuf_rewind(w);
1056         wrbuf_puts(w, "");
1057         res[*count].suggestions_xml = nmem_strdup(nmem, client_get_suggestions_xml(cl, w));
1058         wrbuf_destroy(w);
1059         (*count)++;
1060     }
1061     return res;
1062 }
1063
1064 struct hitsbytarget *get_hitsbytarget(struct session *se, int *count, NMEM nmem)
1065 {
1066     struct hitsbytarget *p;
1067     session_enter(se, "get_hitsbytarget");
1068     p = hitsbytarget_nb(se, count, nmem);
1069     session_leave(se, "get_hitsbytarget");
1070     return p;
1071 }
1072
1073 // Compares two hitsbytarget nodes by hitcount
1074 static int cmp_ht(const void *p1, const void *p2)
1075 {
1076     const struct hitsbytarget *h1 = p1;
1077     const struct hitsbytarget *h2 = p2;
1078     return h2->hits - h1->hits;
1079 }
1080
1081 // Compares two hitsbytarget nodes by hitcount
1082 static int cmp_ht_approx(const void *p1, const void *p2)
1083 {
1084     const struct hitsbytarget *h1 = p1;
1085     const struct hitsbytarget *h2 = p2;
1086     return h2->approximation - h1->approximation;
1087 }
1088
1089 static int targets_termlist_nb(WRBUF wrbuf, struct session *se, int num,
1090                                NMEM nmem, int version)
1091 {
1092     struct hitsbytarget *ht;
1093     int count, i;
1094
1095     ht = hitsbytarget_nb(se, &count, nmem);
1096     if (version >= 2)
1097         qsort(ht, count, sizeof(struct hitsbytarget), cmp_ht_approx);
1098     else
1099         qsort(ht, count, sizeof(struct hitsbytarget), cmp_ht);
1100     for (i = 0; i < count && i < num && ht[i].hits > 0; i++)
1101     {
1102
1103         // do only print terms which have display names
1104
1105         wrbuf_puts(wrbuf, "<term>\n");
1106
1107         wrbuf_puts(wrbuf, "<id>");
1108         wrbuf_xmlputs(wrbuf, ht[i].id);
1109         wrbuf_puts(wrbuf, "</id>\n");
1110
1111         wrbuf_puts(wrbuf, "<name>");
1112         if (!ht[i].name || !ht[i].name[0])
1113             wrbuf_xmlputs(wrbuf, "NO TARGET NAME");
1114         else
1115             wrbuf_xmlputs(wrbuf, ht[i].name);
1116         wrbuf_puts(wrbuf, "</name>\n");
1117
1118         wrbuf_printf(wrbuf, "<frequency>" ODR_INT_PRINTF "</frequency>\n",
1119                      ht[i].hits);
1120
1121         if (version >= 2) {
1122             // Should not print if we know it isn't a approximation.
1123             wrbuf_printf(wrbuf, "<approximation>" ODR_INT_PRINTF "</approximation>\n", ht[i].approximation);
1124             wrbuf_printf(wrbuf, "<records>%d</records>\n", ht[i].records - ht[i].filtered);
1125             wrbuf_printf(wrbuf, "<filtered>%d</filtered>\n", ht[i].filtered);
1126         }
1127
1128         wrbuf_puts(wrbuf, "<state>");
1129         wrbuf_xmlputs(wrbuf, ht[i].state);
1130         wrbuf_puts(wrbuf, "</state>\n");
1131
1132         wrbuf_printf(wrbuf, "<diagnostic>%d</diagnostic>\n",
1133                      ht[i].diagnostic);
1134         wrbuf_puts(wrbuf, "</term>\n");
1135     }
1136     return count;
1137 }
1138
1139 void perform_termlist(struct http_channel *c, struct session *se,
1140                       const char *name, int num, int version)
1141 {
1142     int i, j;
1143     NMEM nmem_tmp = nmem_create();
1144     char **names;
1145     int num_names = 0;
1146
1147     if (!name)
1148         name = "*";
1149
1150     nmem_strsplit(nmem_tmp, ",", name, &names, &num_names);
1151
1152     session_enter(se, "perform_termlist");
1153
1154     for (j = 0; j < num_names; j++)
1155     {
1156         const char *tname;
1157         int must_generate_empty = 1; /* bug 5350 */
1158
1159         for (i = 0; i < se->num_termlists; i++)
1160         {
1161             tname = se->termlists[i].name;
1162             if (!strcmp(names[j], tname) || !strcmp(names[j], "*"))
1163             {
1164                 struct termlist_score **p = 0;
1165                 int len;
1166
1167                 wrbuf_puts(c->wrbuf, "<list name=\"");
1168                 wrbuf_xmlputs(c->wrbuf, tname);
1169                 wrbuf_puts(c->wrbuf, "\">\n");
1170                 must_generate_empty = 0;
1171
1172                 p = termlist_highscore(se->termlists[i].termlist, &len,
1173                                        nmem_tmp);
1174                 if (p)
1175                 {
1176                     int i;
1177                     for (i = 0; i < len && i < num; i++)
1178                     {
1179                         // prevent sending empty term elements
1180                         if (!p[i]->display_term || !p[i]->display_term[0])
1181                             continue;
1182
1183                         wrbuf_puts(c->wrbuf, "<term>");
1184                         wrbuf_puts(c->wrbuf, "<name>");
1185                         wrbuf_xmlputs(c->wrbuf, p[i]->display_term);
1186                         wrbuf_puts(c->wrbuf, "</name>");
1187
1188                         wrbuf_printf(c->wrbuf,
1189                                      "<frequency>%d</frequency>",
1190                                      p[i]->frequency);
1191                         wrbuf_puts(c->wrbuf, "</term>\n");
1192                     }
1193                 }
1194                 wrbuf_puts(c->wrbuf, "</list>\n");
1195             }
1196         }
1197         tname = "xtargets";
1198         if (!strcmp(names[j], tname) || !strcmp(names[j], "*"))
1199         {
1200             wrbuf_puts(c->wrbuf, "<list name=\"");
1201             wrbuf_xmlputs(c->wrbuf, tname);
1202             wrbuf_puts(c->wrbuf, "\">\n");
1203
1204             targets_termlist_nb(c->wrbuf, se, num, c->nmem, version);
1205             wrbuf_puts(c->wrbuf, "</list>\n");
1206             must_generate_empty = 0;
1207         }
1208         if (must_generate_empty)
1209         {
1210             wrbuf_puts(c->wrbuf, "<list name=\"");
1211             wrbuf_xmlputs(c->wrbuf, names[j]);
1212             wrbuf_puts(c->wrbuf, "\"/>\n");
1213         }
1214     }
1215     session_leave(se, "perform_termlist");
1216     nmem_destroy(nmem_tmp);
1217 }
1218
1219 #ifdef MISSING_HEADERS
1220 void report_nmem_stats(void)
1221 {
1222     size_t in_use, is_free;
1223
1224     nmem_get_memory_in_use(&in_use);
1225     nmem_get_memory_free(&is_free);
1226
1227     yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
1228             (long) in_use, (long) is_free);
1229 }
1230 #endif
1231
1232 struct record_cluster *show_single_start(struct session *se, const char *id,
1233                                          struct record_cluster **prev_r,
1234                                          struct record_cluster **next_r)
1235 {
1236     struct record_cluster *r = 0;
1237
1238     session_enter(se, "show_single_start");
1239     *prev_r = 0;
1240     *next_r = 0;
1241     reclist_limit(se->reclist, se);
1242
1243     reclist_enter(se->reclist);
1244     while ((r = reclist_read_record(se->reclist)))
1245     {
1246         if (!strcmp(r->recid, id))
1247         {
1248             *next_r = reclist_read_record(se->reclist);
1249             break;
1250         }
1251         *prev_r = r;
1252     }
1253     reclist_leave(se->reclist);
1254     if (!r)
1255         session_leave(se, "show_single_start");
1256     return r;
1257 }
1258
1259 void show_single_stop(struct session *se, struct record_cluster *rec)
1260 {
1261     session_leave(se, "show_single_stop");
1262 }
1263
1264
1265 int session_fetch_more(struct session *se)
1266 {
1267     struct client_list *l;
1268     int ret = 0;
1269
1270     for (l = se->clients_active; l; l = l->next)
1271     {
1272         struct client *cl = l->client;
1273         if (client_get_state(cl) == Client_Idle)
1274         {
1275             if (client_fetch_more(cl))
1276             {
1277                 session_log(se, YLOG_LOG, "%s: more to fetch",
1278                             client_get_id(cl));
1279                 ret = 1;
1280             }
1281             else
1282             {
1283                 session_log(se, YLOG_LOG, "%s: no more to fetch",
1284                             client_get_id(cl));
1285             }
1286         }
1287         else
1288         {
1289             session_log(se, YLOG_LOG, "%s: no fetch due to state=%s",
1290                         client_get_id(cl), client_get_state_str(cl));
1291         }
1292
1293     }
1294     return ret;
1295 }
1296
1297 struct record_cluster **show_range_start(struct session *se,
1298                                          struct reclist_sortparms *sp,
1299                                          int start, int *num, int *total,
1300                                          Odr_int *sumhits, Odr_int *approx_hits,
1301                                          void (*show_records_ready)(void *data),
1302                                          struct http_channel *chan)
1303 {
1304     struct record_cluster **recs = 0;
1305     struct reclist_sortparms *spp;
1306     struct client_list *l;
1307     int i;
1308 #if USE_TIMING
1309     yaz_timing_t t = yaz_timing_create();
1310 #endif
1311     session_enter(se, "show_range_start");
1312     *sumhits = 0;
1313     *approx_hits = 0;
1314     *total = 0;
1315     reclist_limit(se->reclist, se);
1316     if (se->relevance)
1317     {
1318         for (spp = sp; spp; spp = spp->next)
1319             if (spp->type == Metadata_sortkey_relevance)
1320             {
1321                 relevance_prepare_read(se->relevance, se->reclist);
1322                 break;
1323             }
1324         for (l = se->clients_active; l; l = l->next) {
1325             *sumhits += client_get_hits(l->client);
1326             *approx_hits += client_get_approximation(l->client);
1327         }
1328     }
1329     reclist_sort(se->reclist, sp);
1330
1331     reclist_enter(se->reclist);
1332     *total = reclist_get_num_records(se->reclist);
1333
1334     for (l = se->clients_active; l; l = l->next)
1335         client_update_show_stat(l->client, 0);
1336
1337     for (i = 0; i < start; i++)
1338     {
1339         struct record_cluster *r = reclist_read_record(se->reclist);
1340         if (!r)
1341         {
1342             *num = 0;
1343             break;
1344         }
1345         else
1346         {
1347             struct record *rec = r->records;
1348             for (;rec; rec = rec->next)
1349                 client_update_show_stat(rec->client, 1);
1350         }
1351     }
1352     recs = nmem_malloc(se->nmem, (*num > 0 ? *num : 1) * sizeof(*recs));
1353     for (i = 0; i < *num; i++)
1354     {
1355         struct record_cluster *r = reclist_read_record(se->reclist);
1356         if (!r)
1357         {
1358             *num = i;
1359             break;
1360         }
1361         else
1362         {
1363             struct record *rec = r->records;
1364             for (;rec; rec = rec->next)
1365                 client_update_show_stat(rec->client, 1);
1366             recs[i] = r;
1367         }
1368     }
1369     reclist_leave(se->reclist);
1370 #if USE_TIMING
1371     yaz_timing_stop(t);
1372     session_log(se, YLOG_LOG, "show %6.5f %3.2f %3.2f",
1373             yaz_timing_get_real(t), yaz_timing_get_user(t),
1374             yaz_timing_get_sys(t));
1375     yaz_timing_destroy(&t);
1376 #endif
1377
1378     if (!session_fetch_more(se))
1379         session_log(se, YLOG_LOG, "can not fetch more");
1380     else
1381     {
1382         show_range_stop(se, recs);
1383         session_log(se, YLOG_LOG, "fetching more in progress");
1384         if (session_set_watch(se, SESSION_WATCH_SHOW,
1385                               show_records_ready, chan, chan))
1386         {
1387             session_log(se, YLOG_WARN, "Ignoring show block");
1388             session_enter(se, "show_range_start");
1389         }
1390         else
1391         {
1392             session_log(se, YLOG_LOG, "session watch OK");
1393             return 0;
1394         }
1395     }
1396     return recs;
1397 }
1398
1399 void show_range_stop(struct session *se, struct record_cluster **recs)
1400 {
1401     session_leave(se, "show_range_stop");
1402 }
1403
1404 void statistics(struct session *se, struct statistics *stat)
1405 {
1406     struct client_list *l;
1407     int count = 0;
1408
1409     memset(stat, 0, sizeof(*stat));
1410     stat->num_hits = 0;
1411     for (l = se->clients_active; l; l = l->next)
1412     {
1413         struct client *cl = l->client;
1414         if (!client_get_connection(cl))
1415             stat->num_no_connection++;
1416         stat->num_hits += client_get_hits(cl);
1417         switch (client_get_state(cl))
1418         {
1419         case Client_Connecting: stat->num_connecting++; break;
1420         case Client_Working: stat->num_working++; break;
1421         case Client_Idle: stat->num_idle++; break;
1422         case Client_Failed: stat->num_failed++; break;
1423         case Client_Error: stat->num_error++; break;
1424         default: break;
1425         }
1426         count++;
1427     }
1428     stat->num_records = se->total_records;
1429
1430     stat->num_clients = count;
1431 }
1432
1433 static struct record_metadata *record_metadata_init(
1434     NMEM nmem, const char *value, enum conf_metadata_type type,
1435     struct _xmlAttr *attr)
1436 {
1437     struct record_metadata *rec_md = record_metadata_create(nmem);
1438     struct record_metadata_attr **attrp = &rec_md->attributes;
1439
1440     for (; attr; attr = attr->next)
1441     {
1442         if (attr->children && attr->children->content)
1443         {
1444             if (strcmp((const char *) attr->name, "type")
1445                 && strcmp((const char *) attr->name, "empty"))
1446             {  /* skip the "type" + "empty" attribute..
1447                   The "Type" is already part of the element in output
1448                   (md-%s) and so repeating it here is redundant */
1449                 *attrp = nmem_malloc(nmem, sizeof(**attrp));
1450                 (*attrp)->name =
1451                     nmem_strdup(nmem, (const char *) attr->name);
1452                 (*attrp)->value =
1453                     nmem_strdup(nmem, (const char *) attr->children->content);
1454                 attrp = &(*attrp)->next;
1455             }
1456         }
1457     }
1458     *attrp = 0;
1459
1460     if (type == Metadata_type_generic)
1461     {
1462         char *p = nmem_strdup(nmem, value);
1463
1464         p = normalize7bit_generic(p, " ,/.:([");
1465
1466         rec_md->data.text.disp = p;
1467         rec_md->data.text.sort = 0;
1468     }
1469     else if (type == Metadata_type_year || type == Metadata_type_date)
1470     {
1471         int first, last;
1472         int longdate = 0;
1473
1474         if (type == Metadata_type_date)
1475             longdate = 1;
1476         if (extract7bit_dates((char *) value, &first, &last, longdate) < 0)
1477             return 0;
1478
1479         rec_md->data.number.min = first;
1480         rec_md->data.number.max = last;
1481     }
1482     else
1483         return 0;
1484     return rec_md;
1485 }
1486
1487 static int get_mergekey_from_doc(xmlDoc *doc, xmlNode *root, const char *name,
1488                                  struct conf_service *service, WRBUF norm_wr)
1489 {
1490     xmlNode *n;
1491     int no_found = 0;
1492     for (n = root->children; n; n = n->next)
1493     {
1494         if (n->type != XML_ELEMENT_NODE)
1495             continue;
1496         if (!strcmp((const char *) n->name, "metadata"))
1497         {
1498             xmlChar *type = xmlGetProp(n, (xmlChar *) "type");
1499             if (type == NULL) {
1500                 yaz_log(YLOG_FATAL, "Missing type attribute on metadata element. Skipping!");
1501             }
1502             else if (!strcmp(name, (const char *) type))
1503             {
1504                 xmlChar *value = xmlNodeListGetString(doc, n->children, 1);
1505                 if (value)
1506                 {
1507                     const char *norm_str;
1508                     pp2_charset_token_t prt =
1509                         pp2_charset_token_create(service->charsets, "mergekey");
1510
1511                     pp2_charset_token_first(prt, (const char *) value, 0);
1512                     if (wrbuf_len(norm_wr) > 0)
1513                         wrbuf_puts(norm_wr, " ");
1514                     wrbuf_puts(norm_wr, name);
1515                     while ((norm_str =
1516                             pp2_charset_token_next(prt)))
1517                     {
1518                         if (*norm_str)
1519                         {
1520                             wrbuf_puts(norm_wr, " ");
1521                             wrbuf_puts(norm_wr, norm_str);
1522                         }
1523                     }
1524                     xmlFree(value);
1525                     pp2_charset_token_destroy(prt);
1526                     no_found++;
1527                 }
1528             }
1529             xmlFree(type);
1530         }
1531     }
1532     return no_found;
1533 }
1534
1535 static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
1536                                 struct conf_service *service, NMEM nmem,
1537                                 const char *session_mergekey)
1538 {
1539     char *mergekey_norm = 0;
1540     xmlNode *root = xmlDocGetRootElement(doc);
1541     WRBUF norm_wr = wrbuf_alloc();
1542     xmlChar *mergekey;
1543
1544     if (session_mergekey)
1545     {
1546         int i, num = 0;
1547         char **values = 0;
1548         nmem_strsplit_escape2(nmem, ",", session_mergekey, &values,
1549                               &num, 1, '\\', 1);
1550
1551         for (i = 0; i < num; i++)
1552             get_mergekey_from_doc(doc, root, values[i], service, norm_wr);
1553     }
1554     else if ((mergekey = xmlGetProp(root, (xmlChar *) "mergekey")))
1555     {
1556         const char *norm_str;
1557         pp2_charset_token_t prt =
1558             pp2_charset_token_create(service->charsets, "mergekey");
1559
1560         pp2_charset_token_first(prt, (const char *) mergekey, 0);
1561         while ((norm_str = pp2_charset_token_next(prt)))
1562         {
1563             if (*norm_str)
1564             {
1565                 if (wrbuf_len(norm_wr))
1566                     wrbuf_puts(norm_wr, " ");
1567                 wrbuf_puts(norm_wr, norm_str);
1568             }
1569         }
1570         pp2_charset_token_destroy(prt);
1571         xmlFree(mergekey);
1572     }
1573     else
1574     {
1575         /* no mergekey defined in XSL. Look for mergekey metadata instead */
1576         int field_id;
1577         for (field_id = 0; field_id < service->num_metadata; field_id++)
1578         {
1579             struct conf_metadata *ser_md = &service->metadata[field_id];
1580             if (ser_md->mergekey != Metadata_mergekey_no)
1581             {
1582                 int r = get_mergekey_from_doc(doc, root, ser_md->name,
1583                                               service, norm_wr);
1584                 if (r == 0 && ser_md->mergekey == Metadata_mergekey_required)
1585                 {
1586                     /* no mergekey on this one and it is required..
1587                        Generate unique key instead */
1588                     wrbuf_rewind(norm_wr);
1589                     break;
1590                 }
1591             }
1592         }
1593     }
1594
1595     /* generate unique key if none is not generated already or is empty */
1596     if (wrbuf_len(norm_wr) == 0)
1597     {
1598         wrbuf_printf(norm_wr, "position: %s-%d",
1599                      client_get_id(cl), record_no);
1600     }
1601     else
1602     {
1603         const char *lead = "content: ";
1604         wrbuf_insert(norm_wr, 0, lead, strlen(lead));
1605     }
1606     if (wrbuf_len(norm_wr) > 0)
1607         mergekey_norm = nmem_strdup(nmem, wrbuf_cstr(norm_wr));
1608     wrbuf_destroy(norm_wr);
1609     return mergekey_norm;
1610 }
1611
1612 /** \brief see if metadata for pz:recordfilter exists
1613     \param root xml root element of normalized record
1614     \param sdb session database for client
1615     \retval 0 if there is no metadata for pz:recordfilter
1616     \retval 1 if there is metadata for pz:recordfilter
1617
1618     If there is no pz:recordfilter defined, this function returns 1
1619     as well.
1620 */
1621
1622 static int check_record_filter(xmlNode *root, struct session_database *sdb)
1623 {
1624     int match = 0;
1625     xmlNode *n;
1626     const char *s;
1627     s = session_setting_oneval(sdb, PZ_RECORDFILTER);
1628
1629     if (!s || !*s)
1630         return 1;
1631
1632     for (n = root->children; n; n = n->next)
1633     {
1634         if (n->type != XML_ELEMENT_NODE)
1635             continue;
1636         if (!strcmp((const char *) n->name, "metadata"))
1637         {
1638             xmlChar *type = xmlGetProp(n, (xmlChar *) "type");
1639             if (type)
1640             {
1641                 size_t len;
1642                 int substring;
1643                 const char *eq;
1644
1645                 if ((eq = strchr(s, '=')))
1646                     substring = 0;
1647                 else if ((eq = strchr(s, '~')))
1648                     substring = 1;
1649                 if (eq)
1650                     len = eq - s;
1651                 else
1652                     len = strlen(s);
1653                 if (len == strlen((const char *)type) &&
1654                     !memcmp((const char *) type, s, len))
1655                 {
1656                     xmlChar *value = xmlNodeGetContent(n);
1657                     if (value && *value)
1658                     {
1659                         if (!eq ||
1660                             (substring && strstr((const char *) value, eq+1)) ||
1661                             (!substring && !strcmp((const char *) value, eq + 1)))
1662                             match = 1;
1663                     }
1664                     xmlFree(value);
1665                 }
1666                 xmlFree(type);
1667             }
1668         }
1669     }
1670     return match;
1671 }
1672
1673
1674 static int ingest_to_cluster(struct client *cl,
1675                              xmlDoc *xdoc,
1676                              xmlNode *root,
1677                              int record_no,
1678                              const char *mergekey_norm);
1679
1680 /** \brief ingest XML record
1681     \param cl client holds the result set for record
1682     \param rec record buffer (0 terminated)
1683     \param record_no record position (1, 2, ..)
1684     \param nmem working NMEM
1685     \retval 0 OK
1686     \retval -1 failure
1687     \retval -2 Filtered
1688 */
1689 int ingest_record(struct client *cl, const char *rec,
1690                   int record_no, NMEM nmem)
1691 {
1692     struct session *se = client_get_session(cl);
1693     int ret = 0;
1694     struct session_database *sdb = client_get_database(cl);
1695     struct conf_service *service = se->service;
1696     xmlDoc *xdoc = normalize_record(se, sdb, service, rec, nmem);
1697     xmlNode *root;
1698     const char *mergekey_norm;
1699
1700     if (!xdoc)
1701         return -1;
1702
1703     root = xmlDocGetRootElement(xdoc);
1704
1705     if (!check_record_filter(root, sdb))
1706     {
1707         session_log(se, YLOG_LOG, "Filtered out record no %d from %s", record_no, sdb->database->id);
1708         xmlFreeDoc(xdoc);
1709         return -2;
1710     }
1711
1712     mergekey_norm = get_mergekey(xdoc, cl, record_no, service, nmem,
1713         se->mergekey);
1714     if (!mergekey_norm)
1715     {
1716         session_log(se, YLOG_WARN, "Got no mergekey");
1717         xmlFreeDoc(xdoc);
1718         return -1;
1719     }
1720     session_enter(se, "ingest_record");
1721     if (client_get_session(cl) == se && se->relevance)
1722         ret = ingest_to_cluster(cl, xdoc, root, record_no, mergekey_norm);
1723     session_leave(se, "ingest_record");
1724
1725     xmlFreeDoc(xdoc);
1726     return ret;
1727 }
1728
1729 //    struct conf_metadata *ser_md = &service->metadata[md_field_id];
1730 //    struct record_metadata *rec_md = record->metadata[md_field_id];
1731 static int match_metadata_local(struct conf_metadata *ser_md,
1732                                 struct record_metadata *rec_md0,
1733                                 char **values, int num_v)
1734 {
1735     int i;
1736     struct record_metadata *rec_md = rec_md0;
1737     for (i = 0; i < num_v; )
1738     {
1739         if (rec_md)
1740         {
1741             if (ser_md->type == Metadata_type_year
1742                 || ser_md->type == Metadata_type_date)
1743             {
1744                 int y = atoi(values[i]);
1745                 if (y >= rec_md->data.number.min
1746                     && y <= rec_md->data.number.max)
1747                     break;
1748             }
1749             else
1750             {
1751                 yaz_log(YLOG_DEBUG, "cmp: '%s' '%s'", rec_md->data.text.disp, values[i]);
1752                 if (!strcmp(rec_md->data.text.disp, values[i]))
1753                 {
1754                     // Value equals, should not be filtered.
1755                     break;
1756                 }
1757             }
1758             rec_md = rec_md->next;
1759         }
1760         else
1761         {
1762             rec_md = rec_md0;
1763             i++;
1764         }
1765     }
1766     return i < num_v ? 1 : 0;
1767 }
1768
1769 int session_check_cluster_limit(struct session *se, struct record_cluster *rec)
1770 {
1771     int i;
1772     struct conf_service *service = se->service;
1773     int ret = 1;
1774     const char *name;
1775     const char *value;
1776     NMEM nmem_tmp = nmem_create();
1777
1778     for (i = 0; (name = facet_limits_get(se->facet_limits, i, &value)); i++)
1779     {
1780         int j;
1781         for (j = 0; j < service->num_metadata; j++)
1782         {
1783             struct conf_metadata *md = service->metadata + j;
1784             if (!strcmp(md->name, name) && md->limitcluster)
1785             {
1786                 char **values = 0;
1787                 int num = 0;
1788                 int md_field_id =
1789                     conf_service_metadata_field_id(service,
1790                                                    md->limitcluster);
1791
1792                 if (md_field_id < 0)
1793                 {
1794                     ret = 0;
1795                     break;
1796                 }
1797
1798                 nmem_strsplit_escape2(nmem_tmp, "|", value, &values,
1799                                       &num, 1, '\\', 1);
1800
1801                 if (!match_metadata_local(&service->metadata[md_field_id],
1802                                           rec->metadata[md_field_id],
1803                                           values, num))
1804                 {
1805                     ret = 0;
1806                     break;
1807                 }
1808             }
1809         }
1810     }
1811     nmem_destroy(nmem_tmp);
1812     return ret;
1813 }
1814
1815 // Skip record on non-zero
1816 static int check_limit_local(struct client *cl,
1817                              struct record *record,
1818                              int record_no)
1819 {
1820     int skip_record = 0;
1821     struct session *se = client_get_session(cl);
1822     struct conf_service *service = se->service;
1823     NMEM nmem_tmp = nmem_create();
1824     struct session_database *sdb = client_get_database(cl);
1825     int l = 0;
1826     while (!skip_record)
1827     {
1828         int md_field_id;
1829         char **values = 0;
1830         int num_v = 0;
1831         const char *name =
1832             client_get_facet_limit_local(cl, sdb, &l, nmem_tmp,
1833                                          &num_v, &values);
1834         if (!name)
1835             break;
1836
1837         if (!strcmp(name, "*"))
1838         {
1839             for (md_field_id = 0; md_field_id < service->num_metadata;
1840                  md_field_id++)
1841             {
1842                 if (match_metadata_local(
1843                         &service->metadata[md_field_id],
1844                         record->metadata[md_field_id],
1845                         values, num_v))
1846                     break;
1847             }
1848             if (md_field_id == service->num_metadata)
1849                 skip_record = 1;
1850         }
1851         else
1852         {
1853             md_field_id = conf_service_metadata_field_id(service, name);
1854             if (md_field_id < 0)
1855             {
1856                 skip_record = 1;
1857                 break;
1858             }
1859             if (!match_metadata_local(
1860                     &service->metadata[md_field_id],
1861                     record->metadata[md_field_id],
1862                     values, num_v))
1863             {
1864                 skip_record = 1;
1865             }
1866         }
1867     }
1868     nmem_destroy(nmem_tmp);
1869     return skip_record;
1870 }
1871
1872 static int ingest_to_cluster(struct client *cl,
1873                              xmlDoc *xdoc,
1874                              xmlNode *root,
1875                              int record_no,
1876                              const char *mergekey_norm)
1877 {
1878     xmlNode *n;
1879     xmlChar *type = 0;
1880     xmlChar *value = 0;
1881     struct session *se = client_get_session(cl);
1882     struct conf_service *service = se->service;
1883     int term_factor = 1;
1884     struct record_cluster *cluster;
1885     struct record_metadata **metadata0;
1886     struct session_database *sdb = client_get_database(cl);
1887     struct record *record = record_create(se->nmem,
1888                                           service->num_metadata,
1889                                           service->num_sortkeys, cl,
1890                                           record_no);
1891
1892     for (n = root->children; n; n = n->next)
1893     {
1894         if (type)
1895             xmlFree(type);
1896         if (value)
1897             xmlFree(value);
1898         type = value = 0;
1899
1900         if (n->type != XML_ELEMENT_NODE)
1901             continue;
1902         if (!strcmp((const char *) n->name, "metadata"))
1903         {
1904             struct conf_metadata *ser_md = 0;
1905             struct record_metadata **wheretoput = 0;
1906             struct record_metadata *rec_md = 0;
1907             int md_field_id = -1;
1908
1909             type = xmlGetProp(n, (xmlChar *) "type");
1910             value = xmlNodeListGetString(xdoc, n->children, 1);
1911             if (!type)
1912                 continue;
1913             if (!value || !*value)
1914             {
1915                 xmlChar *empty = xmlGetProp(n, (xmlChar *) "empty");
1916                 if (!empty)
1917                     continue;
1918                 if (value)
1919                     xmlFree(value);
1920                 value = empty;
1921             }
1922             md_field_id
1923                 = conf_service_metadata_field_id(service, (const char *) type);
1924             if (md_field_id < 0)
1925             {
1926                 if (se->number_of_warnings_unknown_metadata == 0)
1927                 {
1928                     session_log(se, YLOG_WARN,
1929                             "Ignoring unknown metadata element: %s", type);
1930                 }
1931                 se->number_of_warnings_unknown_metadata++;
1932                 continue;
1933             }
1934
1935             ser_md = &service->metadata[md_field_id];
1936
1937             // non-merged metadata
1938             rec_md = record_metadata_init(se->nmem, (const char *) value,
1939                                           ser_md->type, n->properties);
1940             if (!rec_md)
1941             {
1942                 session_log(se, YLOG_WARN, "bad metadata data '%s' "
1943                             "for element '%s'", value, type);
1944                 continue;
1945             }
1946             wheretoput = &record->metadata[md_field_id];
1947             while (*wheretoput)
1948                 wheretoput = &(*wheretoput)->next;
1949             *wheretoput = rec_md;
1950         }
1951     }
1952
1953     if (check_limit_local(cl, record, record_no))
1954     {
1955         session_log(se, YLOG_LOG, "Facet filtered out record no %d from %s",
1956                     record_no, sdb->database->id);
1957         if (type)
1958             xmlFree(type);
1959         if (value)
1960             xmlFree(value);
1961         return -2;
1962     }
1963     cluster = reclist_insert(se->reclist, service, record,
1964                              mergekey_norm, &se->total_merged);
1965     if (!cluster)
1966         return 0; // complete match with existing record
1967
1968     {
1969         const char *use_term_factor_str =
1970             session_setting_oneval(sdb, PZ_TERMLIST_TERM_FACTOR);
1971         if (use_term_factor_str && use_term_factor_str[0] == '1')
1972         {
1973             int maxrecs = client_get_maxrecs(cl);
1974             int hits = (int) client_get_hits(cl);
1975             term_factor = MAX(hits, maxrecs) /  MAX(1, maxrecs);
1976             assert(term_factor >= 1);
1977             session_log(se, YLOG_DEBUG, "Using term factor: %d (%d / %d)",
1978                         term_factor, MAX(hits, maxrecs), MAX(1, maxrecs));
1979         }
1980     }
1981
1982     if (global_parameters.dump_records)
1983         session_log(se, YLOG_LOG, "Cluster id %s from %s (#%d)", cluster->recid,
1984                     sdb->database->id, record_no);
1985
1986
1987     relevance_newrec(se->relevance, cluster);
1988
1989     // original metadata, to check if first existence of a field
1990     metadata0 = xmalloc(sizeof(*metadata0) * service->num_metadata);
1991     memcpy(metadata0, cluster->metadata,
1992            sizeof(*metadata0) * service->num_metadata);
1993
1994     // now parsing XML record and adding data to cluster or record metadata
1995     for (n = root->children; n; n = n->next)
1996     {
1997         pp2_charset_token_t prt;
1998         if (type)
1999             xmlFree(type);
2000         if (value)
2001             xmlFree(value);
2002         type = value = 0;
2003
2004         if (n->type != XML_ELEMENT_NODE)
2005             continue;
2006         if (!strcmp((const char *) n->name, "metadata"))
2007         {
2008             struct conf_metadata *ser_md = 0;
2009             struct conf_sortkey *ser_sk = 0;
2010             struct record_metadata **wheretoput = 0;
2011             struct record_metadata *rec_md = 0;
2012             int md_field_id = -1;
2013             int sk_field_id = -1;
2014             const char *rank;
2015             xmlChar *xml_rank;
2016
2017             type = xmlGetProp(n, (xmlChar *) "type");
2018             value = xmlNodeListGetString(xdoc, n->children, 1);
2019
2020             if (!type || !value || !*value)
2021                 continue;
2022
2023             md_field_id
2024                 = conf_service_metadata_field_id(service, (const char *) type);
2025             if (md_field_id < 0)
2026                 continue;
2027
2028             ser_md = &service->metadata[md_field_id];
2029
2030             if (ser_md->sortkey_offset >= 0)
2031             {
2032                 sk_field_id = ser_md->sortkey_offset;
2033                 ser_sk = &service->sortkeys[sk_field_id];
2034             }
2035
2036             // merged metadata
2037             rec_md = record_metadata_init(se->nmem, (const char *) value,
2038                                           ser_md->type, 0);
2039
2040             // see if the field was not in cluster already (from beginning)
2041
2042             if (!rec_md)
2043                 continue;
2044
2045             xml_rank = xmlGetProp(n, (xmlChar *) "rank");
2046             rank = xml_rank ? (const char *) xml_rank : ser_md->rank;
2047
2048             wheretoput = &cluster->metadata[md_field_id];
2049
2050             if (ser_md->merge == Metadata_merge_first)
2051             {
2052                 if (!metadata0[md_field_id])
2053                 {
2054                     while (*wheretoput)
2055                         wheretoput = &(*wheretoput)->next;
2056                     *wheretoput = rec_md;
2057                 }
2058             }
2059             else if (ser_md->merge == Metadata_merge_unique)
2060             {
2061                 while (*wheretoput)
2062                 {
2063                     if (!strcmp((const char *) (*wheretoput)->data.text.disp,
2064                                 rec_md->data.text.disp))
2065                         break;
2066                     wheretoput = &(*wheretoput)->next;
2067                 }
2068                 if (!*wheretoput)
2069                     *wheretoput = rec_md;
2070             }
2071             else if (ser_md->merge == Metadata_merge_longest)
2072             {
2073                 if (!*wheretoput
2074                     || strlen(rec_md->data.text.disp)
2075                     > strlen((*wheretoput)->data.text.disp))
2076                 {
2077                     *wheretoput = rec_md;
2078                     if (ser_sk)
2079                     {
2080                         const char *sort_str = 0;
2081                         int skip_article =
2082                             ser_sk->type == Metadata_sortkey_skiparticle;
2083
2084                         if (!cluster->sortkeys[sk_field_id])
2085                             cluster->sortkeys[sk_field_id] =
2086                                 nmem_malloc(se->nmem,
2087                                             sizeof(union data_types));
2088
2089                         prt =
2090                             pp2_charset_token_create(service->charsets, "sort");
2091
2092                         pp2_charset_token_first(prt, rec_md->data.text.disp,
2093                                                 skip_article);
2094
2095                         pp2_charset_token_next(prt);
2096
2097                         sort_str = pp2_get_sort(prt);
2098
2099                         cluster->sortkeys[sk_field_id]->text.disp =
2100                             rec_md->data.text.disp;
2101                         if (!sort_str)
2102                         {
2103                             sort_str = rec_md->data.text.disp;
2104                             session_log(se, YLOG_WARN,
2105                                     "Could not make sortkey. Bug #1858");
2106                         }
2107                         cluster->sortkeys[sk_field_id]->text.sort =
2108                             nmem_strdup(se->nmem, sort_str);
2109                         pp2_charset_token_destroy(prt);
2110                     }
2111                 }
2112             }
2113             else if (ser_md->merge == Metadata_merge_all)
2114             {
2115                 while (*wheretoput)
2116                     wheretoput = &(*wheretoput)->next;
2117                 *wheretoput = rec_md;
2118             }
2119             else if (ser_md->merge == Metadata_merge_range)
2120             {
2121                 if (!*wheretoput)
2122                 {
2123                     *wheretoput = rec_md;
2124                     if (ser_sk)
2125                         cluster->sortkeys[sk_field_id]
2126                             = &rec_md->data;
2127                 }
2128                 else
2129                 {
2130                     int this_min = rec_md->data.number.min;
2131                     int this_max = rec_md->data.number.max;
2132                     if (this_min < (*wheretoput)->data.number.min)
2133                         (*wheretoput)->data.number.min = this_min;
2134                     if (this_max > (*wheretoput)->data.number.max)
2135                         (*wheretoput)->data.number.max = this_max;
2136                 }
2137             }
2138
2139             // ranking of _all_ fields enabled ...
2140             if (rank)
2141             {
2142                 relevance_countwords(se->relevance, cluster,
2143                                      (char *) value, rank, ser_md->name);
2144             }
2145
2146             // construct facets ... unless the client already has reported them
2147             if (ser_md->termlist && !client_has_facet(cl, (char *) type))
2148             {
2149                 if (ser_md->type == Metadata_type_year)
2150                 {
2151                     char year[64];
2152                     sprintf(year, "%d", rec_md->data.number.max);
2153
2154                     add_facet(se, (char *) type, year, term_factor);
2155                     if (rec_md->data.number.max != rec_md->data.number.min)
2156                     {
2157                         sprintf(year, "%d", rec_md->data.number.min);
2158                         add_facet(se, (char *) type, year, term_factor);
2159                     }
2160                 }
2161                 else
2162                     add_facet(se, (char *) type, (char *) value, term_factor);
2163             }
2164
2165             // cleaning up
2166             if (xml_rank)
2167                 xmlFree(xml_rank);
2168             xmlFree(type);
2169             xmlFree(value);
2170             type = value = 0;
2171         }
2172         else
2173         {
2174             if (se->number_of_warnings_unknown_elements == 0)
2175                 session_log(se, YLOG_WARN,
2176                         "Unexpected element in internal record: %s", n->name);
2177             se->number_of_warnings_unknown_elements++;
2178         }
2179     }
2180     if (type)
2181         xmlFree(type);
2182     if (value)
2183         xmlFree(value);
2184
2185     xfree(metadata0);
2186     relevance_donerecord(se->relevance, cluster);
2187     se->total_records++;
2188
2189     return 0;
2190 }
2191
2192 void session_log(struct session *s, int level, const char *fmt, ...)
2193 {
2194     char buf[1024];
2195     va_list ap;
2196     va_start(ap, fmt);
2197
2198     yaz_vsnprintf(buf, sizeof(buf)-30, fmt, ap);
2199     yaz_log(level, "Session %u: %s", s ? s->session_id : 0, buf);
2200
2201     va_end(ap);
2202 }
2203
2204 /*
2205  * Local variables:
2206  * c-basic-offset: 4
2207  * c-file-style: "Stroustrup"
2208  * indent-tabs-mode: nil
2209  * End:
2210  * vim: shiftwidth=4 tabstop=8 expandtab
2211  */
2212