2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.36 1996-05-01 13:46:37 adam
8 * First work on multiple records in one file.
9 * New option, -offset, to the "unread" command in the filter module.
11 * Revision 1.35 1996/03/26 16:01:14 adam
12 * New setting lockPath: directory of various lock files.
14 * Revision 1.34 1996/03/20 09:36:46 adam
15 * Function dict_lookup_grep got extra parameter, init_pos, which marks
16 * from which position in pattern approximate pattern matching should occur.
17 * Approximate pattern matching is used in relevance=re-2.
19 * Revision 1.33 1996/01/17 14:57:56 adam
20 * Prototype changed for reader functions in extract/retrieve. File
21 * is identified by 'void *' instead of 'int.
23 * Revision 1.32 1995/12/11 09:12:58 adam
24 * The rec_get function returns NULL if record doesn't exist - will
25 * happen in the server if the result set records have been deleted since
26 * the creation of the set (i.e. the search).
27 * The server saves a result temporarily if it is 'volatile', i.e. the
28 * set is register dependent.
30 * Revision 1.31 1995/12/08 16:22:56 adam
31 * Work on update while servers are running. Three lock files introduced.
32 * The servers reload their registers when necessary, but they don't
33 * reestablish result sets yet.
35 * Revision 1.30 1995/12/07 17:38:48 adam
36 * Work locking mechanisms for concurrent updates/commit.
38 * Revision 1.29 1995/12/04 14:22:32 adam
39 * Extra arg to recType_byName.
40 * Started work on new regular expression parsed input to
43 * Revision 1.28 1995/11/28 09:09:48 adam
44 * Zebra config renamed.
45 * Use setting 'recordId' to identify record now.
46 * Bug fix in recindex.c: rec_release_blocks was invokeded even
47 * though the blocks were already released.
48 * File traversal properly deletes records when needed.
50 * Revision 1.27 1995/11/27 13:58:54 adam
51 * New option -t. storeStore data implemented in server.
53 * Revision 1.26 1995/11/25 10:24:07 adam
54 * More record fields - they are enumerated now.
55 * New options: flagStoreData flagStoreKey.
57 * Revision 1.25 1995/11/21 15:29:13 adam
58 * Config file 'base' read by default by both indexer and server.
60 * Revision 1.24 1995/11/20 16:59:47 adam
61 * New update method: the 'old' keys are saved for each records.
63 * Revision 1.23 1995/11/16 17:00:56 adam
64 * Better logging of rpn query.
66 * Revision 1.22 1995/11/16 15:34:55 adam
67 * Uses new record management system in both indexer and server.
69 * Revision 1.21 1995/11/01 16:25:52 quinn
70 * *** empty log message ***
72 * Revision 1.20 1995/10/27 14:00:12 adam
73 * Implemented detection of database availability.
75 * Revision 1.19 1995/10/17 18:02:11 adam
76 * New feature: databases. Implemented as prefix to words in dictionary.
78 * Revision 1.18 1995/10/16 14:03:09 quinn
79 * Changes to support element set names and espec1
81 * Revision 1.17 1995/10/16 09:32:40 adam
82 * More work on relational op.
84 * Revision 1.16 1995/10/13 12:26:44 adam
85 * Optimization of truncation.
87 * Revision 1.15 1995/10/12 12:40:55 adam
88 * Bug fixes in rpn_prox.
90 * Revision 1.14 1995/10/09 16:18:37 adam
91 * Function dict_lookup_grep got extra client data parameter.
93 * Revision 1.13 1995/10/06 14:38:00 adam
94 * New result set method: r_score.
95 * Local no (sysno) and score is transferred to retrieveCtrl.
97 * Revision 1.12 1995/10/06 13:52:06 adam
98 * Bug fixes. Handler may abort further scanning.
100 * Revision 1.11 1995/10/06 10:43:57 adam
101 * Scan added. 'occurrences' in scan entries not set yet.
103 * Revision 1.10 1995/10/02 16:43:32 quinn
104 * Set default resulting record type in fetch.
106 * Revision 1.9 1995/10/02 15:18:52 adam
107 * New member in recRetrieveCtrl: diagnostic.
109 * Revision 1.8 1995/09/28 09:19:47 adam
110 * xfree/xmalloc used everywhere.
111 * Extract/retrieve method seems to work for text records.
113 * Revision 1.7 1995/09/27 16:17:32 adam
114 * More work on retrieve.
116 * Revision 1.6 1995/09/08 08:53:22 adam
117 * Record buffer maintained in server_info.
119 * Revision 1.5 1995/09/06 16:11:18 adam
120 * Option: only one word key per file.
122 * Revision 1.4 1995/09/06 10:33:04 adam
123 * More work on present. Some log messages removed.
125 * Revision 1.3 1995/09/05 15:28:40 adam
126 * More work on search engine.
128 * Revision 1.2 1995/09/04 12:33:43 adam
129 * Various cleanup. YAZ util used instead.
131 * Revision 1.1 1995/09/04 09:10:41 adam
132 * More work on index add/del/update.
133 * Merge sort implemented.
134 * Initial work on z39 server.
148 ZServerInfo server_info;
150 static int register_lock (ZServerInfo *zi)
153 int state = zebraServerLockGetState(&lastChange);
163 zebraServerLock (state);
164 if (zi->registerState == state)
166 if (zi->registerChange >= lastChange)
168 logf (LOG_LOG, "Register completely updated since last access");
170 else if (zi->registerState == -1)
171 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
174 logf (LOG_LOG, "Register has changed state from %d to %d",
175 zi->registerState, state);
176 zi->registerChange = lastChange;
179 dict_close (zi->wordDict);
180 is_close (zi->wordIsam);
181 rec_close (&zi->records);
184 zi->registerState = state;
185 zi->records = rec_open (0);
186 if (!(zi->wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
188 if (!(zi->wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
189 sizeof (struct it_key))))
194 static void register_unlock (ZServerInfo *zi)
196 static int waitSec = -1;
200 char *s = res_get (common_resource, "debugRequestWait");
208 if (zi->registerState != -1)
209 zebraServerUnlock (zi->registerState);
212 bend_initresult *bend_init (bend_initrequest *q)
214 static bend_initresult r;
215 static char *name = "zserver";
221 logf (LOG_DEBUG, "bend_init");
223 if (!common_resource)
225 struct statserv_options_block *sob;
227 sob = statserv_getcontrol ();
228 logf (LOG_LOG, "Reading resources from %s", sob->configname);
229 if (!(common_resource = res_open (sob->configname)))
231 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
234 bf_lockDir (res_get (common_resource, "lockPath"));
235 data1_tabpath = res_get(common_resource, "profilePath");
237 server_info.sets = NULL;
238 server_info.registerState = -1; /* trigger open of registers! */
239 server_info.registerChange = 0;
241 server_info.records = NULL;
242 server_info.wordDict = NULL;
243 server_info.wordIsam = NULL;
244 server_info.odr = odr_createmem (ODR_ENCODE);
248 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
250 static bend_searchresult r;
256 register_lock (&server_info);
257 odr_reset (server_info.odr);
258 server_info.errCode = 0;
259 server_info.errString = NULL;
261 logf (LOG_LOG, "ResultSet '%s'", q->setname);
262 switch (q->query->which)
265 r.errcode = rpn_search (&server_info, q->query->u.type_1,
266 q->num_bases, q->basenames, q->setname,
268 r.errstring = server_info.errString;
273 register_unlock (&server_info);
277 static int record_offset;
279 static int record_ext_read (void *fh, char *buf, size_t count)
281 return read (*((int*) fh), buf, count);
284 static off_t record_ext_seek (void *fh, off_t offset)
286 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
289 static int record_int_pos;
290 static char *record_int_buf;
291 static int record_int_len;
293 static off_t record_int_seek (void *fh, off_t offset)
295 return (off_t) (record_int_pos = offset);
298 static int record_int_read (void *fh, char *buf, size_t count)
300 int l = record_int_len - record_int_pos;
303 l = (l < count) ? l : count;
304 memcpy (buf, record_int_buf + record_int_pos, l);
309 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
310 oid_value input_format, Z_RecordComposition *comp,
311 oid_value *output_format, char **rec_bufp,
315 char *fname, *file_type;
318 struct recRetrieveCtrl retrieveCtrl;
321 rec = rec_get (zi->records, sysno);
324 char *msg = "Record is deleted\n";
325 *output_format = VAL_SUTRS;
327 *rec_lenp = strlen (msg);
328 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
331 file_type = rec->info[recInfo_fileType];
332 fname = rec->info[recInfo_filename];
334 if (!(rt = recType_byName (file_type, subType)))
336 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
340 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
341 if (rec->size[recInfo_storeData] > 0)
343 retrieveCtrl.readf = record_int_read;
344 retrieveCtrl.seekf = record_int_seek;
345 record_int_len = rec->size[recInfo_storeData];
346 record_int_buf = rec->info[recInfo_storeData];
348 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
352 if ((fd = open (fname, O_RDONLY)) == -1)
354 char *msg = "Record doesn't exist\n";
355 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
356 *output_format = VAL_SUTRS;
358 *rec_lenp = strlen (msg);
360 return 0; /* or 14: System error in presenting records */
363 memcpy (&record_offset, rec->info[recInfo_offset],
364 sizeof(record_offset));
366 retrieveCtrl.fh = &fd;
367 retrieveCtrl.readf = record_ext_read;
368 retrieveCtrl.seekf = record_ext_seek;
370 record_ext_seek (retrieveCtrl.fh, 0);
372 retrieveCtrl.subType = subType;
373 retrieveCtrl.localno = sysno;
374 retrieveCtrl.score = score;
375 retrieveCtrl.odr = stream;
376 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
377 retrieveCtrl.comp = comp;
378 retrieveCtrl.diagnostic = 0;
379 (*rt->retrieve)(&retrieveCtrl);
380 *output_format = retrieveCtrl.output_format;
381 *rec_bufp = retrieveCtrl.rec_buf;
382 *rec_lenp = retrieveCtrl.rec_len;
387 return retrieveCtrl.diagnostic;
390 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
392 static bend_fetchresult r;
394 ZServerSetSysno *records;
396 register_lock (&server_info);
402 odr_reset (server_info.odr);
403 server_info.errCode = 0;
405 positions[0] = q->number;
406 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
409 logf (LOG_DEBUG, "resultSetRecordGet, error");
411 register_unlock (&server_info);
414 if (!records[0].sysno)
417 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
418 register_unlock (&server_info);
421 r.errcode = record_fetch (&server_info, records[0].sysno,
422 records[0].score, q->stream, q->format,
423 q->comp, &r.format, &r.record, &r.len);
424 resultSetSysnoDel (&server_info, records, 1);
425 register_unlock (&server_info);
429 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
431 register_lock (&server_info);
432 register_unlock (&server_info);
436 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
438 static bend_scanresult r;
441 register_lock (&server_info);
442 odr_reset (server_info.odr);
443 server_info.errCode = 0;
444 server_info.errString = 0;
446 r.term_position = q->term_position;
447 r.num_entries = q->num_entries;
448 r.errcode = rpn_scan (&server_info, q->term,
449 q->num_bases, q->basenames,
451 &r.num_entries, &r.entries, &status);
452 r.errstring = server_info.errString;
454 register_unlock (&server_info);
458 void bend_close (void *handle)
460 if (server_info.records)
462 dict_close (server_info.wordDict);
463 is_close (server_info.wordIsam);
464 rec_close (&server_info.records);
465 register_unlock (&server_info);
470 int main (int argc, char **argv)
472 struct statserv_options_block *sob;
474 sob = statserv_getcontrol ();
475 strcpy (sob->configname, FNAME_CONFIG);
476 statserv_setcontrol (sob);
478 return statserv_main (argc, argv);