2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.34 1996-03-20 09:36:46 adam
8 * Function dict_lookup_grep got extra parameter, init_pos, which marks
9 * from which position in pattern approximate pattern matching should occur.
10 * Approximate pattern matching is used in relevance=re-2.
12 * Revision 1.33 1996/01/17 14:57:56 adam
13 * Prototype changed for reader functions in extract/retrieve. File
14 * is identified by 'void *' instead of 'int.
16 * Revision 1.32 1995/12/11 09:12:58 adam
17 * The rec_get function returns NULL if record doesn't exist - will
18 * happen in the server if the result set records have been deleted since
19 * the creation of the set (i.e. the search).
20 * The server saves a result temporarily if it is 'volatile', i.e. the
21 * set is register dependent.
23 * Revision 1.31 1995/12/08 16:22:56 adam
24 * Work on update while servers are running. Three lock files introduced.
25 * The servers reload their registers when necessary, but they don't
26 * reestablish result sets yet.
28 * Revision 1.30 1995/12/07 17:38:48 adam
29 * Work locking mechanisms for concurrent updates/commit.
31 * Revision 1.29 1995/12/04 14:22:32 adam
32 * Extra arg to recType_byName.
33 * Started work on new regular expression parsed input to
36 * Revision 1.28 1995/11/28 09:09:48 adam
37 * Zebra config renamed.
38 * Use setting 'recordId' to identify record now.
39 * Bug fix in recindex.c: rec_release_blocks was invokeded even
40 * though the blocks were already released.
41 * File traversal properly deletes records when needed.
43 * Revision 1.27 1995/11/27 13:58:54 adam
44 * New option -t. storeStore data implemented in server.
46 * Revision 1.26 1995/11/25 10:24:07 adam
47 * More record fields - they are enumerated now.
48 * New options: flagStoreData flagStoreKey.
50 * Revision 1.25 1995/11/21 15:29:13 adam
51 * Config file 'base' read by default by both indexer and server.
53 * Revision 1.24 1995/11/20 16:59:47 adam
54 * New update method: the 'old' keys are saved for each records.
56 * Revision 1.23 1995/11/16 17:00:56 adam
57 * Better logging of rpn query.
59 * Revision 1.22 1995/11/16 15:34:55 adam
60 * Uses new record management system in both indexer and server.
62 * Revision 1.21 1995/11/01 16:25:52 quinn
63 * *** empty log message ***
65 * Revision 1.20 1995/10/27 14:00:12 adam
66 * Implemented detection of database availability.
68 * Revision 1.19 1995/10/17 18:02:11 adam
69 * New feature: databases. Implemented as prefix to words in dictionary.
71 * Revision 1.18 1995/10/16 14:03:09 quinn
72 * Changes to support element set names and espec1
74 * Revision 1.17 1995/10/16 09:32:40 adam
75 * More work on relational op.
77 * Revision 1.16 1995/10/13 12:26:44 adam
78 * Optimization of truncation.
80 * Revision 1.15 1995/10/12 12:40:55 adam
81 * Bug fixes in rpn_prox.
83 * Revision 1.14 1995/10/09 16:18:37 adam
84 * Function dict_lookup_grep got extra client data parameter.
86 * Revision 1.13 1995/10/06 14:38:00 adam
87 * New result set method: r_score.
88 * Local no (sysno) and score is transferred to retrieveCtrl.
90 * Revision 1.12 1995/10/06 13:52:06 adam
91 * Bug fixes. Handler may abort further scanning.
93 * Revision 1.11 1995/10/06 10:43:57 adam
94 * Scan added. 'occurrences' in scan entries not set yet.
96 * Revision 1.10 1995/10/02 16:43:32 quinn
97 * Set default resulting record type in fetch.
99 * Revision 1.9 1995/10/02 15:18:52 adam
100 * New member in recRetrieveCtrl: diagnostic.
102 * Revision 1.8 1995/09/28 09:19:47 adam
103 * xfree/xmalloc used everywhere.
104 * Extract/retrieve method seems to work for text records.
106 * Revision 1.7 1995/09/27 16:17:32 adam
107 * More work on retrieve.
109 * Revision 1.6 1995/09/08 08:53:22 adam
110 * Record buffer maintained in server_info.
112 * Revision 1.5 1995/09/06 16:11:18 adam
113 * Option: only one word key per file.
115 * Revision 1.4 1995/09/06 10:33:04 adam
116 * More work on present. Some log messages removed.
118 * Revision 1.3 1995/09/05 15:28:40 adam
119 * More work on search engine.
121 * Revision 1.2 1995/09/04 12:33:43 adam
122 * Various cleanup. YAZ util used instead.
124 * Revision 1.1 1995/09/04 09:10:41 adam
125 * More work on index add/del/update.
126 * Merge sort implemented.
127 * Initial work on z39 server.
141 ZServerInfo server_info;
143 static int register_lock (ZServerInfo *zi)
146 int state = zebraServerLockGetState(&lastChange);
156 zebraServerLock (state);
157 if (zi->registerState == state)
159 if (zi->registerChange >= lastChange)
161 logf (LOG_LOG, "Register completely updated since last access");
163 else if (zi->registerState == -1)
164 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
167 logf (LOG_LOG, "Register has changed state from %d to %d",
168 zi->registerState, state);
169 zi->registerChange = lastChange;
172 dict_close (zi->wordDict);
173 is_close (zi->wordIsam);
174 rec_close (&zi->records);
177 zi->registerState = state;
178 zi->records = rec_open (0);
179 if (!(zi->wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
181 if (!(zi->wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
182 sizeof (struct it_key))))
187 static void register_unlock (ZServerInfo *zi)
189 static int waitSec = -1;
193 char *s = res_get (common_resource, "debugRequestWait");
201 if (zi->registerState != -1)
202 zebraServerUnlock (zi->registerState);
205 bend_initresult *bend_init (bend_initrequest *q)
207 static bend_initresult r;
208 static char *name = "zserver";
214 logf (LOG_DEBUG, "bend_init");
216 if (!common_resource)
218 struct statserv_options_block *sob;
220 sob = statserv_getcontrol ();
221 logf (LOG_LOG, "Reading resources from %s", sob->configname);
222 if (!(common_resource = res_open (sob->configname)))
224 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
228 data1_tabpath = res_get(common_resource, "profilePath");
229 server_info.sets = NULL;
230 server_info.registerState = -1; /* trigger open of registers! */
231 server_info.registerChange = 0;
233 server_info.records = NULL;
234 server_info.wordDict = NULL;
235 server_info.wordIsam = NULL;
236 server_info.odr = odr_createmem (ODR_ENCODE);
240 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
242 static bend_searchresult r;
248 register_lock (&server_info);
249 odr_reset (server_info.odr);
250 server_info.errCode = 0;
251 server_info.errString = NULL;
253 logf (LOG_LOG, "ResultSet '%s'", q->setname);
254 switch (q->query->which)
257 r.errcode = rpn_search (&server_info, q->query->u.type_1,
258 q->num_bases, q->basenames, q->setname,
260 r.errstring = server_info.errString;
265 register_unlock (&server_info);
269 static int record_ext_read (void *fh, char *buf, size_t count)
271 return read (*((int*) fh), buf, count);
274 static int record_int_pos;
275 static char *record_int_buf;
276 static int record_int_len;
278 static int record_int_read (void *fh, char *buf, size_t count)
280 int l = record_int_len - record_int_pos;
283 l = (l < count) ? l : count;
284 memcpy (buf, record_int_buf + record_int_pos, l);
289 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
290 oid_value input_format, Z_RecordComposition *comp,
291 oid_value *output_format, char **rec_bufp,
295 char *fname, *file_type;
298 struct recRetrieveCtrl retrieveCtrl;
301 rec = rec_get (zi->records, sysno);
304 char *msg = "Record is deleted\n";
305 *output_format = VAL_SUTRS;
307 *rec_lenp = strlen (msg);
308 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
311 file_type = rec->info[recInfo_fileType];
312 fname = rec->info[recInfo_filename];
314 if (!(rt = recType_byName (file_type, subType)))
316 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
320 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
321 if (rec->size[recInfo_storeData] > 0)
323 retrieveCtrl.readf = record_int_read;
324 record_int_len = rec->size[recInfo_storeData];
325 record_int_buf = rec->info[recInfo_storeData];
327 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
331 if ((fd = open (fname, O_RDONLY)) == -1)
333 char *msg = "Record doesn't exist\n";
334 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
335 *output_format = VAL_SUTRS;
337 *rec_lenp = strlen (msg);
339 return 0; /* or 14: System error in presenting records */
341 retrieveCtrl.fh = &fd;
342 retrieveCtrl.readf = record_ext_read;
344 retrieveCtrl.subType = subType;
345 retrieveCtrl.localno = sysno;
346 retrieveCtrl.score = score;
347 retrieveCtrl.odr = stream;
348 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
349 retrieveCtrl.comp = comp;
350 retrieveCtrl.diagnostic = 0;
351 (*rt->retrieve)(&retrieveCtrl);
352 *output_format = retrieveCtrl.output_format;
353 *rec_bufp = retrieveCtrl.rec_buf;
354 *rec_lenp = retrieveCtrl.rec_len;
359 return retrieveCtrl.diagnostic;
362 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
364 static bend_fetchresult r;
366 ZServerSetSysno *records;
368 register_lock (&server_info);
374 odr_reset (server_info.odr);
375 server_info.errCode = 0;
377 positions[0] = q->number;
378 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
381 logf (LOG_DEBUG, "resultSetRecordGet, error");
383 register_unlock (&server_info);
386 if (!records[0].sysno)
389 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
390 register_unlock (&server_info);
393 r.errcode = record_fetch (&server_info, records[0].sysno,
394 records[0].score, q->stream, q->format,
395 q->comp, &r.format, &r.record, &r.len);
396 resultSetSysnoDel (&server_info, records, 1);
397 register_unlock (&server_info);
401 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
403 register_lock (&server_info);
404 register_unlock (&server_info);
408 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
410 static bend_scanresult r;
413 register_lock (&server_info);
414 odr_reset (server_info.odr);
415 server_info.errCode = 0;
416 server_info.errString = 0;
418 r.term_position = q->term_position;
419 r.num_entries = q->num_entries;
420 r.errcode = rpn_scan (&server_info, q->term,
421 q->num_bases, q->basenames,
423 &r.num_entries, &r.entries, &status);
424 r.errstring = server_info.errString;
426 register_unlock (&server_info);
430 void bend_close (void *handle)
432 if (server_info.records)
434 dict_close (server_info.wordDict);
435 is_close (server_info.wordIsam);
436 rec_close (&server_info.records);
437 register_unlock (&server_info);
442 int main (int argc, char **argv)
444 struct statserv_options_block *sob;
446 sob = statserv_getcontrol ();
447 strcpy (sob->configname, FNAME_CONFIG);
448 statserv_setcontrol (sob);
450 return statserv_main (argc, argv);