2 * Copyright (C) 1994-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.39 1996-05-31 09:07:05 quinn
8 * Work on character-set handling
10 * Revision 1.38 1996/05/14 11:34:01 adam
11 * Scan support in multiple registers/databases.
13 * Revision 1.37 1996/05/14 06:16:48 adam
14 * Compact use/set bytes used in search service.
16 * Revision 1.36 1996/05/01 13:46:37 adam
17 * First work on multiple records in one file.
18 * New option, -offset, to the "unread" command in the filter module.
20 * Revision 1.35 1996/03/26 16:01:14 adam
21 * New setting lockPath: directory of various lock files.
23 * Revision 1.34 1996/03/20 09:36:46 adam
24 * Function dict_lookup_grep got extra parameter, init_pos, which marks
25 * from which position in pattern approximate pattern matching should occur.
26 * Approximate pattern matching is used in relevance=re-2.
28 * Revision 1.33 1996/01/17 14:57:56 adam
29 * Prototype changed for reader functions in extract/retrieve. File
30 * is identified by 'void *' instead of 'int.
32 * Revision 1.32 1995/12/11 09:12:58 adam
33 * The rec_get function returns NULL if record doesn't exist - will
34 * happen in the server if the result set records have been deleted since
35 * the creation of the set (i.e. the search).
36 * The server saves a result temporarily if it is 'volatile', i.e. the
37 * set is register dependent.
39 * Revision 1.31 1995/12/08 16:22:56 adam
40 * Work on update while servers are running. Three lock files introduced.
41 * The servers reload their registers when necessary, but they don't
42 * reestablish result sets yet.
44 * Revision 1.30 1995/12/07 17:38:48 adam
45 * Work locking mechanisms for concurrent updates/commit.
47 * Revision 1.29 1995/12/04 14:22:32 adam
48 * Extra arg to recType_byName.
49 * Started work on new regular expression parsed input to
52 * Revision 1.28 1995/11/28 09:09:48 adam
53 * Zebra config renamed.
54 * Use setting 'recordId' to identify record now.
55 * Bug fix in recindex.c: rec_release_blocks was invokeded even
56 * though the blocks were already released.
57 * File traversal properly deletes records when needed.
59 * Revision 1.27 1995/11/27 13:58:54 adam
60 * New option -t. storeStore data implemented in server.
62 * Revision 1.26 1995/11/25 10:24:07 adam
63 * More record fields - they are enumerated now.
64 * New options: flagStoreData flagStoreKey.
66 * Revision 1.25 1995/11/21 15:29:13 adam
67 * Config file 'base' read by default by both indexer and server.
69 * Revision 1.24 1995/11/20 16:59:47 adam
70 * New update method: the 'old' keys are saved for each records.
72 * Revision 1.23 1995/11/16 17:00:56 adam
73 * Better logging of rpn query.
75 * Revision 1.22 1995/11/16 15:34:55 adam
76 * Uses new record management system in both indexer and server.
78 * Revision 1.21 1995/11/01 16:25:52 quinn
79 * *** empty log message ***
81 * Revision 1.20 1995/10/27 14:00:12 adam
82 * Implemented detection of database availability.
84 * Revision 1.19 1995/10/17 18:02:11 adam
85 * New feature: databases. Implemented as prefix to words in dictionary.
87 * Revision 1.18 1995/10/16 14:03:09 quinn
88 * Changes to support element set names and espec1
90 * Revision 1.17 1995/10/16 09:32:40 adam
91 * More work on relational op.
93 * Revision 1.16 1995/10/13 12:26:44 adam
94 * Optimization of truncation.
96 * Revision 1.15 1995/10/12 12:40:55 adam
97 * Bug fixes in rpn_prox.
99 * Revision 1.14 1995/10/09 16:18:37 adam
100 * Function dict_lookup_grep got extra client data parameter.
102 * Revision 1.13 1995/10/06 14:38:00 adam
103 * New result set method: r_score.
104 * Local no (sysno) and score is transferred to retrieveCtrl.
106 * Revision 1.12 1995/10/06 13:52:06 adam
107 * Bug fixes. Handler may abort further scanning.
109 * Revision 1.11 1995/10/06 10:43:57 adam
110 * Scan added. 'occurrences' in scan entries not set yet.
112 * Revision 1.10 1995/10/02 16:43:32 quinn
113 * Set default resulting record type in fetch.
115 * Revision 1.9 1995/10/02 15:18:52 adam
116 * New member in recRetrieveCtrl: diagnostic.
118 * Revision 1.8 1995/09/28 09:19:47 adam
119 * xfree/xmalloc used everywhere.
120 * Extract/retrieve method seems to work for text records.
122 * Revision 1.7 1995/09/27 16:17:32 adam
123 * More work on retrieve.
125 * Revision 1.6 1995/09/08 08:53:22 adam
126 * Record buffer maintained in server_info.
128 * Revision 1.5 1995/09/06 16:11:18 adam
129 * Option: only one word key per file.
131 * Revision 1.4 1995/09/06 10:33:04 adam
132 * More work on present. Some log messages removed.
134 * Revision 1.3 1995/09/05 15:28:40 adam
135 * More work on search engine.
137 * Revision 1.2 1995/09/04 12:33:43 adam
138 * Various cleanup. YAZ util used instead.
140 * Revision 1.1 1995/09/04 09:10:41 adam
141 * More work on index add/del/update.
142 * Merge sort implemented.
143 * Initial work on z39 server.
157 ZServerInfo server_info;
159 static int register_lock (ZServerInfo *zi)
162 int state = zebraServerLockGetState(&lastChange);
172 zebraServerLock (state);
173 if (zi->registerState == state)
175 if (zi->registerChange >= lastChange)
177 logf (LOG_LOG, "Register completely updated since last access");
179 else if (zi->registerState == -1)
180 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
183 logf (LOG_LOG, "Register has changed state from %d to %d",
184 zi->registerState, state);
185 zi->registerChange = lastChange;
188 zebTargetInfo_close (zi->zti, 0);
189 dict_close (zi->wordDict);
190 is_close (zi->wordIsam);
191 rec_close (&zi->records);
194 zi->registerState = state;
195 zi->records = rec_open (0);
196 if (!(zi->wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
198 if (!(zi->wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
199 sizeof (struct it_key))))
201 zi->zti = zebTargetInfo_open (zi->records, 0);
205 static void register_unlock (ZServerInfo *zi)
207 static int waitSec = -1;
211 char *s = res_get (common_resource, "debugRequestWait");
219 if (zi->registerState != -1)
220 zebraServerUnlock (zi->registerState);
223 bend_initresult *bend_init (bend_initrequest *q)
225 static bend_initresult r;
226 static char *name = "zserver";
232 logf (LOG_DEBUG, "bend_init");
234 if (!common_resource)
236 struct statserv_options_block *sob;
238 sob = statserv_getcontrol ();
239 logf (LOG_LOG, "Reading resources from %s", sob->configname);
240 if (!(common_resource = res_open (sob->configname)))
242 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
245 bf_lockDir (res_get (common_resource, "lockPath"));
246 data1_tabpath = res_get(common_resource, "profilePath");
248 server_info.sets = NULL;
249 server_info.registerState = -1; /* trigger open of registers! */
250 server_info.registerChange = 0;
252 server_info.records = NULL;
253 server_info.wordDict = NULL;
254 server_info.wordIsam = NULL;
255 server_info.odr = odr_createmem (ODR_ENCODE);
259 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
261 static bend_searchresult r;
267 register_lock (&server_info);
268 odr_reset (server_info.odr);
269 server_info.errCode = 0;
270 server_info.errString = NULL;
272 logf (LOG_LOG, "ResultSet '%s'", q->setname);
273 switch (q->query->which)
275 case Z_Query_type_1: case Z_Query_type_101:
276 r.errcode = rpn_search (&server_info, q->query->u.type_1,
277 q->num_bases, q->basenames, q->setname,
279 r.errstring = server_info.errString;
284 register_unlock (&server_info);
288 static int record_offset;
290 static int record_ext_read (void *fh, char *buf, size_t count)
292 return read (*((int*) fh), buf, count);
295 static off_t record_ext_seek (void *fh, off_t offset)
297 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
300 static int record_int_pos;
301 static char *record_int_buf;
302 static int record_int_len;
304 static off_t record_int_seek (void *fh, off_t offset)
306 return (off_t) (record_int_pos = offset);
309 static int record_int_read (void *fh, char *buf, size_t count)
311 int l = record_int_len - record_int_pos;
314 l = (l < count) ? l : count;
315 memcpy (buf, record_int_buf + record_int_pos, l);
320 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
321 oid_value input_format, Z_RecordComposition *comp,
322 oid_value *output_format, char **rec_bufp,
326 char *fname, *file_type;
329 struct recRetrieveCtrl retrieveCtrl;
332 rec = rec_get (zi->records, sysno);
335 char *msg = "Record is deleted\n";
336 *output_format = VAL_SUTRS;
338 *rec_lenp = strlen (msg);
339 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
342 file_type = rec->info[recInfo_fileType];
343 fname = rec->info[recInfo_filename];
345 if (!(rt = recType_byName (file_type, subType)))
347 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
351 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
352 if (rec->size[recInfo_storeData] > 0)
354 retrieveCtrl.readf = record_int_read;
355 retrieveCtrl.seekf = record_int_seek;
356 record_int_len = rec->size[recInfo_storeData];
357 record_int_buf = rec->info[recInfo_storeData];
359 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
363 if ((fd = open (fname, O_RDONLY)) == -1)
365 char *msg = "Record doesn't exist\n";
366 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
367 *output_format = VAL_SUTRS;
369 *rec_lenp = strlen (msg);
371 return 0; /* or 14: System error in presenting records */
374 memcpy (&record_offset, rec->info[recInfo_offset],
375 sizeof(record_offset));
377 retrieveCtrl.fh = &fd;
378 retrieveCtrl.readf = record_ext_read;
379 retrieveCtrl.seekf = record_ext_seek;
381 record_ext_seek (retrieveCtrl.fh, 0);
383 retrieveCtrl.subType = subType;
384 retrieveCtrl.localno = sysno;
385 retrieveCtrl.score = score;
386 retrieveCtrl.odr = stream;
387 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
388 retrieveCtrl.comp = comp;
389 retrieveCtrl.diagnostic = 0;
390 (*rt->retrieve)(&retrieveCtrl);
391 *output_format = retrieveCtrl.output_format;
392 *rec_bufp = retrieveCtrl.rec_buf;
393 *rec_lenp = retrieveCtrl.rec_len;
398 return retrieveCtrl.diagnostic;
401 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
403 static bend_fetchresult r;
405 ZServerSetSysno *records;
407 register_lock (&server_info);
413 odr_reset (server_info.odr);
414 server_info.errCode = 0;
416 positions[0] = q->number;
417 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
420 logf (LOG_DEBUG, "resultSetRecordGet, error");
422 register_unlock (&server_info);
425 if (!records[0].sysno)
428 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
429 register_unlock (&server_info);
432 r.errcode = record_fetch (&server_info, records[0].sysno,
433 records[0].score, q->stream, q->format,
434 q->comp, &r.format, &r.record, &r.len);
435 resultSetSysnoDel (&server_info, records, 1);
436 register_unlock (&server_info);
440 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
442 register_lock (&server_info);
443 register_unlock (&server_info);
447 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
449 static bend_scanresult r;
452 register_lock (&server_info);
453 odr_reset (server_info.odr);
454 server_info.errCode = 0;
455 server_info.errString = 0;
457 r.term_position = q->term_position;
458 r.num_entries = q->num_entries;
459 r.errcode = rpn_scan (&server_info, q->term,
461 q->num_bases, q->basenames,
463 &r.num_entries, &r.entries, &status);
464 r.errstring = server_info.errString;
466 register_unlock (&server_info);
470 void bend_close (void *handle)
472 if (server_info.records)
474 dict_close (server_info.wordDict);
475 is_close (server_info.wordIsam);
476 rec_close (&server_info.records);
477 register_unlock (&server_info);
482 int main (int argc, char **argv)
484 struct statserv_options_block *sob;
486 sob = statserv_getcontrol ();
487 strcpy (sob->configname, FNAME_CONFIG);
488 statserv_setcontrol (sob);
490 return statserv_main (argc, argv);