2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.40 1996-06-04 10:19:02 adam
8 * Minor changes - removed include of ctype.h.
10 * Revision 1.39 1996/05/31 09:07:05 quinn
11 * Work on character-set handling
13 * Revision 1.38 1996/05/14 11:34:01 adam
14 * Scan support in multiple registers/databases.
16 * Revision 1.37 1996/05/14 06:16:48 adam
17 * Compact use/set bytes used in search service.
19 * Revision 1.36 1996/05/01 13:46:37 adam
20 * First work on multiple records in one file.
21 * New option, -offset, to the "unread" command in the filter module.
23 * Revision 1.35 1996/03/26 16:01:14 adam
24 * New setting lockPath: directory of various lock files.
26 * Revision 1.34 1996/03/20 09:36:46 adam
27 * Function dict_lookup_grep got extra parameter, init_pos, which marks
28 * from which position in pattern approximate pattern matching should occur.
29 * Approximate pattern matching is used in relevance=re-2.
31 * Revision 1.33 1996/01/17 14:57:56 adam
32 * Prototype changed for reader functions in extract/retrieve. File
33 * is identified by 'void *' instead of 'int.
35 * Revision 1.32 1995/12/11 09:12:58 adam
36 * The rec_get function returns NULL if record doesn't exist - will
37 * happen in the server if the result set records have been deleted since
38 * the creation of the set (i.e. the search).
39 * The server saves a result temporarily if it is 'volatile', i.e. the
40 * set is register dependent.
42 * Revision 1.31 1995/12/08 16:22:56 adam
43 * Work on update while servers are running. Three lock files introduced.
44 * The servers reload their registers when necessary, but they don't
45 * reestablish result sets yet.
47 * Revision 1.30 1995/12/07 17:38:48 adam
48 * Work locking mechanisms for concurrent updates/commit.
50 * Revision 1.29 1995/12/04 14:22:32 adam
51 * Extra arg to recType_byName.
52 * Started work on new regular expression parsed input to
55 * Revision 1.28 1995/11/28 09:09:48 adam
56 * Zebra config renamed.
57 * Use setting 'recordId' to identify record now.
58 * Bug fix in recindex.c: rec_release_blocks was invokeded even
59 * though the blocks were already released.
60 * File traversal properly deletes records when needed.
62 * Revision 1.27 1995/11/27 13:58:54 adam
63 * New option -t. storeStore data implemented in server.
65 * Revision 1.26 1995/11/25 10:24:07 adam
66 * More record fields - they are enumerated now.
67 * New options: flagStoreData flagStoreKey.
69 * Revision 1.25 1995/11/21 15:29:13 adam
70 * Config file 'base' read by default by both indexer and server.
72 * Revision 1.24 1995/11/20 16:59:47 adam
73 * New update method: the 'old' keys are saved for each records.
75 * Revision 1.23 1995/11/16 17:00:56 adam
76 * Better logging of rpn query.
78 * Revision 1.22 1995/11/16 15:34:55 adam
79 * Uses new record management system in both indexer and server.
81 * Revision 1.21 1995/11/01 16:25:52 quinn
82 * *** empty log message ***
84 * Revision 1.20 1995/10/27 14:00:12 adam
85 * Implemented detection of database availability.
87 * Revision 1.19 1995/10/17 18:02:11 adam
88 * New feature: databases. Implemented as prefix to words in dictionary.
90 * Revision 1.18 1995/10/16 14:03:09 quinn
91 * Changes to support element set names and espec1
93 * Revision 1.17 1995/10/16 09:32:40 adam
94 * More work on relational op.
96 * Revision 1.16 1995/10/13 12:26:44 adam
97 * Optimization of truncation.
99 * Revision 1.15 1995/10/12 12:40:55 adam
100 * Bug fixes in rpn_prox.
102 * Revision 1.14 1995/10/09 16:18:37 adam
103 * Function dict_lookup_grep got extra client data parameter.
105 * Revision 1.13 1995/10/06 14:38:00 adam
106 * New result set method: r_score.
107 * Local no (sysno) and score is transferred to retrieveCtrl.
109 * Revision 1.12 1995/10/06 13:52:06 adam
110 * Bug fixes. Handler may abort further scanning.
112 * Revision 1.11 1995/10/06 10:43:57 adam
113 * Scan added. 'occurrences' in scan entries not set yet.
115 * Revision 1.10 1995/10/02 16:43:32 quinn
116 * Set default resulting record type in fetch.
118 * Revision 1.9 1995/10/02 15:18:52 adam
119 * New member in recRetrieveCtrl: diagnostic.
121 * Revision 1.8 1995/09/28 09:19:47 adam
122 * xfree/xmalloc used everywhere.
123 * Extract/retrieve method seems to work for text records.
125 * Revision 1.7 1995/09/27 16:17:32 adam
126 * More work on retrieve.
128 * Revision 1.6 1995/09/08 08:53:22 adam
129 * Record buffer maintained in server_info.
131 * Revision 1.5 1995/09/06 16:11:18 adam
132 * Option: only one word key per file.
134 * Revision 1.4 1995/09/06 10:33:04 adam
135 * More work on present. Some log messages removed.
137 * Revision 1.3 1995/09/05 15:28:40 adam
138 * More work on search engine.
140 * Revision 1.2 1995/09/04 12:33:43 adam
141 * Various cleanup. YAZ util used instead.
143 * Revision 1.1 1995/09/04 09:10:41 adam
144 * More work on index add/del/update.
145 * Merge sort implemented.
146 * Initial work on z39 server.
160 ZServerInfo server_info;
162 static int register_lock (ZServerInfo *zi)
165 int state = zebraServerLockGetState(&lastChange);
175 zebraServerLock (state);
176 if (zi->registerState == state)
178 if (zi->registerChange >= lastChange)
180 logf (LOG_LOG, "Register completely updated since last access");
182 else if (zi->registerState == -1)
183 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
186 logf (LOG_LOG, "Register has changed state from %d to %d",
187 zi->registerState, state);
188 zi->registerChange = lastChange;
191 zebTargetInfo_close (zi->zti, 0);
192 dict_close (zi->wordDict);
193 is_close (zi->wordIsam);
194 rec_close (&zi->records);
197 zi->registerState = state;
198 zi->records = rec_open (0);
199 if (!(zi->wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
201 if (!(zi->wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
202 sizeof (struct it_key))))
204 zi->zti = zebTargetInfo_open (zi->records, 0);
209 static void register_unlock (ZServerInfo *zi)
211 static int waitSec = -1;
215 char *s = res_get (common_resource, "debugRequestWait");
223 if (zi->registerState != -1)
224 zebraServerUnlock (zi->registerState);
227 bend_initresult *bend_init (bend_initrequest *q)
229 static bend_initresult r;
230 static char *name = "zserver";
236 logf (LOG_DEBUG, "bend_init");
238 if (!common_resource)
240 struct statserv_options_block *sob;
242 sob = statserv_getcontrol ();
243 logf (LOG_LOG, "Reading resources from %s", sob->configname);
244 if (!(common_resource = res_open (sob->configname)))
246 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
249 bf_lockDir (res_get (common_resource, "lockPath"));
250 data1_tabpath = res_get(common_resource, "profilePath");
252 server_info.sets = NULL;
253 server_info.registerState = -1; /* trigger open of registers! */
254 server_info.registerChange = 0;
256 server_info.records = NULL;
257 server_info.wordDict = NULL;
258 server_info.wordIsam = NULL;
259 server_info.odr = odr_createmem (ODR_ENCODE);
263 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
265 static bend_searchresult r;
271 register_lock (&server_info);
272 odr_reset (server_info.odr);
273 server_info.errCode = 0;
274 server_info.errString = NULL;
276 logf (LOG_LOG, "ResultSet '%s'", q->setname);
277 switch (q->query->which)
279 case Z_Query_type_1: case Z_Query_type_101:
280 r.errcode = rpn_search (&server_info, q->query->u.type_1,
281 q->num_bases, q->basenames, q->setname,
283 r.errstring = server_info.errString;
288 register_unlock (&server_info);
292 static int record_offset;
294 static int record_ext_read (void *fh, char *buf, size_t count)
296 return read (*((int*) fh), buf, count);
299 static off_t record_ext_seek (void *fh, off_t offset)
301 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
304 static int record_int_pos;
305 static char *record_int_buf;
306 static int record_int_len;
308 static off_t record_int_seek (void *fh, off_t offset)
310 return (off_t) (record_int_pos = offset);
313 static int record_int_read (void *fh, char *buf, size_t count)
315 int l = record_int_len - record_int_pos;
318 l = (l < count) ? l : count;
319 memcpy (buf, record_int_buf + record_int_pos, l);
324 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
325 oid_value input_format, Z_RecordComposition *comp,
326 oid_value *output_format, char **rec_bufp,
330 char *fname, *file_type;
333 struct recRetrieveCtrl retrieveCtrl;
336 rec = rec_get (zi->records, sysno);
339 char *msg = "Record is deleted\n";
340 *output_format = VAL_SUTRS;
342 *rec_lenp = strlen (msg);
343 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
346 file_type = rec->info[recInfo_fileType];
347 fname = rec->info[recInfo_filename];
349 if (!(rt = recType_byName (file_type, subType)))
351 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
355 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
356 if (rec->size[recInfo_storeData] > 0)
358 retrieveCtrl.readf = record_int_read;
359 retrieveCtrl.seekf = record_int_seek;
360 record_int_len = rec->size[recInfo_storeData];
361 record_int_buf = rec->info[recInfo_storeData];
363 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
367 if ((fd = open (fname, O_RDONLY)) == -1)
369 char *msg = "Record doesn't exist\n";
370 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
371 *output_format = VAL_SUTRS;
373 *rec_lenp = strlen (msg);
375 return 0; /* or 14: System error in presenting records */
378 memcpy (&record_offset, rec->info[recInfo_offset],
379 sizeof(record_offset));
381 retrieveCtrl.fh = &fd;
382 retrieveCtrl.readf = record_ext_read;
383 retrieveCtrl.seekf = record_ext_seek;
385 record_ext_seek (retrieveCtrl.fh, 0);
387 retrieveCtrl.subType = subType;
388 retrieveCtrl.localno = sysno;
389 retrieveCtrl.score = score;
390 retrieveCtrl.odr = stream;
391 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
392 retrieveCtrl.comp = comp;
393 retrieveCtrl.diagnostic = 0;
394 (*rt->retrieve)(&retrieveCtrl);
395 *output_format = retrieveCtrl.output_format;
396 *rec_bufp = retrieveCtrl.rec_buf;
397 *rec_lenp = retrieveCtrl.rec_len;
402 return retrieveCtrl.diagnostic;
405 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
407 static bend_fetchresult r;
409 ZServerSetSysno *records;
411 register_lock (&server_info);
417 odr_reset (server_info.odr);
418 server_info.errCode = 0;
420 positions[0] = q->number;
421 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
424 logf (LOG_DEBUG, "resultSetRecordGet, error");
426 register_unlock (&server_info);
429 if (!records[0].sysno)
432 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
433 register_unlock (&server_info);
436 r.errcode = record_fetch (&server_info, records[0].sysno,
437 records[0].score, q->stream, q->format,
438 q->comp, &r.format, &r.record, &r.len);
439 resultSetSysnoDel (&server_info, records, 1);
440 register_unlock (&server_info);
444 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
446 register_lock (&server_info);
447 register_unlock (&server_info);
451 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
453 static bend_scanresult r;
456 register_lock (&server_info);
457 odr_reset (server_info.odr);
458 server_info.errCode = 0;
459 server_info.errString = 0;
461 r.term_position = q->term_position;
462 r.num_entries = q->num_entries;
463 r.errcode = rpn_scan (&server_info, q->term,
465 q->num_bases, q->basenames,
467 &r.num_entries, &r.entries, &status);
468 r.errstring = server_info.errString;
470 register_unlock (&server_info);
474 void bend_close (void *handle)
476 if (server_info.records)
478 dict_close (server_info.wordDict);
479 is_close (server_info.wordIsam);
480 rec_close (&server_info.records);
481 register_unlock (&server_info);
486 int main (int argc, char **argv)
488 struct statserv_options_block *sob;
490 sob = statserv_getcontrol ();
491 strcpy (sob->configname, FNAME_CONFIG);
492 statserv_setcontrol (sob);
494 return statserv_main (argc, argv);