2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.46 1997-07-28 08:30:47 adam
8 * Server returns diagnostic 14 when record doesn't exist.
10 * Revision 1.45 1996/12/23 15:30:45 adam
12 * Bug fix: result sets weren't deleted after server shut down.
14 * Revision 1.44 1996/12/11 12:08:01 adam
15 * Added better compression.
17 * Revision 1.43 1996/11/15 15:03:58 adam
18 * Logging of execution speed by using the times(2) call.
20 * Revision 1.42 1996/11/08 11:10:36 adam
21 * Buffers used during file match got bigger.
22 * Compressed ISAM support everywhere.
23 * Bug fixes regarding masking characters in queries.
24 * Redesigned Regexp-2 queries.
26 * Revision 1.41 1996/10/29 14:09:56 adam
27 * Use of cisam system - enabled if setting isamc is 1.
29 * Revision 1.40 1996/06/04 10:19:02 adam
30 * Minor changes - removed include of ctype.h.
32 * Revision 1.39 1996/05/31 09:07:05 quinn
33 * Work on character-set handling
35 * Revision 1.38 1996/05/14 11:34:01 adam
36 * Scan support in multiple registers/databases.
38 * Revision 1.37 1996/05/14 06:16:48 adam
39 * Compact use/set bytes used in search service.
41 * Revision 1.36 1996/05/01 13:46:37 adam
42 * First work on multiple records in one file.
43 * New option, -offset, to the "unread" command in the filter module.
45 * Revision 1.35 1996/03/26 16:01:14 adam
46 * New setting lockPath: directory of various lock files.
48 * Revision 1.34 1996/03/20 09:36:46 adam
49 * Function dict_lookup_grep got extra parameter, init_pos, which marks
50 * from which position in pattern approximate pattern matching should occur.
51 * Approximate pattern matching is used in relevance=re-2.
53 * Revision 1.33 1996/01/17 14:57:56 adam
54 * Prototype changed for reader functions in extract/retrieve. File
55 * is identified by 'void *' instead of 'int.
57 * Revision 1.32 1995/12/11 09:12:58 adam
58 * The rec_get function returns NULL if record doesn't exist - will
59 * happen in the server if the result set records have been deleted since
60 * the creation of the set (i.e. the search).
61 * The server saves a result temporarily if it is 'volatile', i.e. the
62 * set is register dependent.
64 * Revision 1.31 1995/12/08 16:22:56 adam
65 * Work on update while servers are running. Three lock files introduced.
66 * The servers reload their registers when necessary, but they don't
67 * reestablish result sets yet.
69 * Revision 1.30 1995/12/07 17:38:48 adam
70 * Work locking mechanisms for concurrent updates/commit.
72 * Revision 1.29 1995/12/04 14:22:32 adam
73 * Extra arg to recType_byName.
74 * Started work on new regular expression parsed input to
77 * Revision 1.28 1995/11/28 09:09:48 adam
78 * Zebra config renamed.
79 * Use setting 'recordId' to identify record now.
80 * Bug fix in recindex.c: rec_release_blocks was invokeded even
81 * though the blocks were already released.
82 * File traversal properly deletes records when needed.
84 * Revision 1.27 1995/11/27 13:58:54 adam
85 * New option -t. storeStore data implemented in server.
87 * Revision 1.26 1995/11/25 10:24:07 adam
88 * More record fields - they are enumerated now.
89 * New options: flagStoreData flagStoreKey.
91 * Revision 1.25 1995/11/21 15:29:13 adam
92 * Config file 'base' read by default by both indexer and server.
94 * Revision 1.24 1995/11/20 16:59:47 adam
95 * New update method: the 'old' keys are saved for each records.
97 * Revision 1.23 1995/11/16 17:00:56 adam
98 * Better logging of rpn query.
100 * Revision 1.22 1995/11/16 15:34:55 adam
101 * Uses new record management system in both indexer and server.
103 * Revision 1.21 1995/11/01 16:25:52 quinn
104 * *** empty log message ***
106 * Revision 1.20 1995/10/27 14:00:12 adam
107 * Implemented detection of database availability.
109 * Revision 1.19 1995/10/17 18:02:11 adam
110 * New feature: databases. Implemented as prefix to words in dictionary.
112 * Revision 1.18 1995/10/16 14:03:09 quinn
113 * Changes to support element set names and espec1
115 * Revision 1.17 1995/10/16 09:32:40 adam
116 * More work on relational op.
118 * Revision 1.16 1995/10/13 12:26:44 adam
119 * Optimization of truncation.
121 * Revision 1.15 1995/10/12 12:40:55 adam
122 * Bug fixes in rpn_prox.
124 * Revision 1.14 1995/10/09 16:18:37 adam
125 * Function dict_lookup_grep got extra client data parameter.
127 * Revision 1.13 1995/10/06 14:38:00 adam
128 * New result set method: r_score.
129 * Local no (sysno) and score is transferred to retrieveCtrl.
131 * Revision 1.12 1995/10/06 13:52:06 adam
132 * Bug fixes. Handler may abort further scanning.
134 * Revision 1.11 1995/10/06 10:43:57 adam
135 * Scan added. 'occurrences' in scan entries not set yet.
137 * Revision 1.10 1995/10/02 16:43:32 quinn
138 * Set default resulting record type in fetch.
140 * Revision 1.9 1995/10/02 15:18:52 adam
141 * New member in recRetrieveCtrl: diagnostic.
143 * Revision 1.8 1995/09/28 09:19:47 adam
144 * xfree/xmalloc used everywhere.
145 * Extract/retrieve method seems to work for text records.
147 * Revision 1.7 1995/09/27 16:17:32 adam
148 * More work on retrieve.
150 * Revision 1.6 1995/09/08 08:53:22 adam
151 * Record buffer maintained in server_info.
153 * Revision 1.5 1995/09/06 16:11:18 adam
154 * Option: only one word key per file.
156 * Revision 1.4 1995/09/06 10:33:04 adam
157 * More work on present. Some log messages removed.
159 * Revision 1.3 1995/09/05 15:28:40 adam
160 * More work on search engine.
162 * Revision 1.2 1995/09/04 12:33:43 adam
163 * Various cleanup. YAZ util used instead.
165 * Revision 1.1 1995/09/04 09:10:41 adam
166 * More work on index add/del/update.
167 * Merge sort implemented.
168 * Initial work on z39 server.
187 #include <sys/times.h>
191 ZServerInfo server_info;
194 static struct tms tms1;
195 static struct tms tms2;
198 static int register_lock (ZServerInfo *zi)
201 int state = zebraServerLockGetState(&lastChange);
211 zebraServerLock (state);
215 if (zi->registerState == state)
217 if (zi->registerChange >= lastChange)
219 logf (LOG_LOG, "Register completely updated since last access");
221 else if (zi->registerState == -1)
222 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
225 logf (LOG_LOG, "Register has changed state from %d to %d",
226 zi->registerState, state);
227 zi->registerChange = lastChange;
230 zebTargetInfo_close (zi->zti, 0);
231 dict_close (zi->dict);
235 isc_close (zi->isamc);
236 rec_close (&zi->records);
239 zi->registerState = state;
240 zi->records = rec_open (0);
241 if (!(zi->dict = dict_open (FNAME_DICT, 40, 0)))
245 if (res_get_match (common_resource, "isam", "c", NULL))
247 if (!(zi->isamc = isc_open (FNAME_ISAMC, 0, key_isamc_m())))
253 if (!(zi->isam = is_open (FNAME_ISAM, key_compare, 0,
254 sizeof (struct it_key))))
257 zi->zti = zebTargetInfo_open (zi->records, 0);
262 static void register_unlock (ZServerInfo *zi)
264 static int waitSec = -1;
268 logf (LOG_LOG, "user/system: %ld/%ld",
269 (long) (tms2.tms_utime - tms1.tms_utime),
270 (long) (tms2.tms_stime - tms1.tms_stime));
274 char *s = res_get (common_resource, "debugRequestWait");
282 if (zi->registerState != -1)
283 zebraServerUnlock (zi->registerState);
286 bend_initresult *bend_init (bend_initrequest *q)
288 static bend_initresult r;
289 static char *name = "zserver";
295 logf (LOG_DEBUG, "bend_init");
297 if (!common_resource)
299 struct statserv_options_block *sob;
301 sob = statserv_getcontrol ();
302 logf (LOG_LOG, "Reading resources from %s", sob->configname);
303 if (!(common_resource = res_open (sob->configname)))
305 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
308 bf_lockDir (res_get (common_resource, "lockDir"));
309 data1_set_tabpath (res_get(common_resource, "profilePath"));
311 server_info.sets = NULL;
312 server_info.registerState = -1; /* trigger open of registers! */
313 server_info.registerChange = 0;
315 server_info.records = NULL;
316 server_info.odr = odr_createmem (ODR_ENCODE);
320 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
322 static bend_searchresult r;
328 register_lock (&server_info);
329 odr_reset (server_info.odr);
330 server_info.errCode = 0;
331 server_info.errString = NULL;
333 logf (LOG_LOG, "ResultSet '%s'", q->setname);
334 switch (q->query->which)
336 case Z_Query_type_1: case Z_Query_type_101:
337 r.errcode = rpn_search (&server_info, q->query->u.type_1,
338 q->num_bases, q->basenames, q->setname,
340 r.errstring = server_info.errString;
345 register_unlock (&server_info);
349 static int record_offset;
351 static int record_ext_read (void *fh, char *buf, size_t count)
353 return read (*((int*) fh), buf, count);
356 static off_t record_ext_seek (void *fh, off_t offset)
358 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
361 static int record_int_pos;
362 static char *record_int_buf;
363 static int record_int_len;
365 static off_t record_int_seek (void *fh, off_t offset)
367 return (off_t) (record_int_pos = offset);
370 static int record_int_read (void *fh, char *buf, size_t count)
372 int l = record_int_len - record_int_pos;
375 l = (l < count) ? l : count;
376 memcpy (buf, record_int_buf + record_int_pos, l);
381 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
382 oid_value input_format, Z_RecordComposition *comp,
383 oid_value *output_format, char **rec_bufp,
384 int *rec_lenp, char **basenamep)
387 char *fname, *file_type, *basename;
390 struct recRetrieveCtrl retrieveCtrl;
393 rec = rec_get (zi->records, sysno);
396 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
399 file_type = rec->info[recInfo_fileType];
400 fname = rec->info[recInfo_filename];
401 basename = rec->info[recInfo_databaseName];
402 *basenamep = odr_malloc (stream, strlen(basename)+1);
403 strcpy (*basenamep, basename);
405 if (!(rt = recType_byName (file_type, subType)))
407 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
411 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
412 if (rec->size[recInfo_storeData] > 0)
414 retrieveCtrl.readf = record_int_read;
415 retrieveCtrl.seekf = record_int_seek;
416 record_int_len = rec->size[recInfo_storeData];
417 record_int_buf = rec->info[recInfo_storeData];
419 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
423 if ((fd = open (fname, O_RDONLY)) == -1)
425 logf (LOG_WARN|LOG_ERRNO, "Retrieve fail; missing file: %s",
430 memcpy (&record_offset, rec->info[recInfo_offset],
431 sizeof(record_offset));
433 retrieveCtrl.fh = &fd;
434 retrieveCtrl.readf = record_ext_read;
435 retrieveCtrl.seekf = record_ext_seek;
437 record_ext_seek (retrieveCtrl.fh, 0);
439 retrieveCtrl.subType = subType;
440 retrieveCtrl.localno = sysno;
441 retrieveCtrl.score = score;
442 retrieveCtrl.odr = stream;
443 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
444 retrieveCtrl.comp = comp;
445 retrieveCtrl.diagnostic = 0;
446 (*rt->retrieve)(&retrieveCtrl);
447 *output_format = retrieveCtrl.output_format;
448 *rec_bufp = retrieveCtrl.rec_buf;
449 *rec_lenp = retrieveCtrl.rec_len;
454 return retrieveCtrl.diagnostic;
457 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
459 static bend_fetchresult r;
461 ZServerSetSysno *records;
463 register_lock (&server_info);
469 odr_reset (server_info.odr);
470 server_info.errCode = 0;
472 positions[0] = q->number;
473 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
476 logf (LOG_DEBUG, "resultSetRecordGet, error");
478 register_unlock (&server_info);
481 if (!records[0].sysno)
484 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
485 register_unlock (&server_info);
488 r.errcode = record_fetch (&server_info, records[0].sysno,
489 records[0].score, q->stream, q->format,
490 q->comp, &r.format, &r.record, &r.len,
492 resultSetSysnoDel (&server_info, records, 1);
493 register_unlock (&server_info);
497 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
499 register_lock (&server_info);
500 register_unlock (&server_info);
504 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
506 static bend_scanresult r;
509 register_lock (&server_info);
510 odr_reset (server_info.odr);
511 server_info.errCode = 0;
512 server_info.errString = 0;
514 r.term_position = q->term_position;
515 r.num_entries = q->num_entries;
516 r.errcode = rpn_scan (&server_info, q->term,
518 q->num_bases, q->basenames,
520 &r.num_entries, &r.entries, &status);
521 r.errstring = server_info.errString;
523 register_unlock (&server_info);
527 void bend_close (void *handle)
529 if (server_info.records)
531 resultSetDestroy (&server_info);
532 dict_close (server_info.dict);
533 if (server_info.isam)
534 is_close (server_info.isam);
535 if (server_info.isamc)
536 isc_close (server_info.isamc);
537 rec_close (&server_info.records);
538 register_unlock (&server_info);
543 int main (int argc, char **argv)
545 struct statserv_options_block *sob;
547 sob = statserv_getcontrol ();
548 strcpy (sob->configname, FNAME_CONFIG);
549 statserv_setcontrol (sob);
551 return statserv_main (argc, argv);