2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.32 1995-12-11 09:12:58 adam
8 * The rec_get function returns NULL if record doesn't exist - will
9 * happen in the server if the result set records have been deleted since
10 * the creation of the set (i.e. the search).
11 * The server saves a result temporarily if it is 'volatile', i.e. the
12 * set is register dependent.
14 * Revision 1.31 1995/12/08 16:22:56 adam
15 * Work on update while servers are running. Three lock files introduced.
16 * The servers reload their registers when necessary, but they don't
17 * reestablish result sets yet.
19 * Revision 1.30 1995/12/07 17:38:48 adam
20 * Work locking mechanisms for concurrent updates/commit.
22 * Revision 1.29 1995/12/04 14:22:32 adam
23 * Extra arg to recType_byName.
24 * Started work on new regular expression parsed input to
27 * Revision 1.28 1995/11/28 09:09:48 adam
28 * Zebra config renamed.
29 * Use setting 'recordId' to identify record now.
30 * Bug fix in recindex.c: rec_release_blocks was invokeded even
31 * though the blocks were already released.
32 * File traversal properly deletes records when needed.
34 * Revision 1.27 1995/11/27 13:58:54 adam
35 * New option -t. storeStore data implemented in server.
37 * Revision 1.26 1995/11/25 10:24:07 adam
38 * More record fields - they are enumerated now.
39 * New options: flagStoreData flagStoreKey.
41 * Revision 1.25 1995/11/21 15:29:13 adam
42 * Config file 'base' read by default by both indexer and server.
44 * Revision 1.24 1995/11/20 16:59:47 adam
45 * New update method: the 'old' keys are saved for each records.
47 * Revision 1.23 1995/11/16 17:00:56 adam
48 * Better logging of rpn query.
50 * Revision 1.22 1995/11/16 15:34:55 adam
51 * Uses new record management system in both indexer and server.
53 * Revision 1.21 1995/11/01 16:25:52 quinn
54 * *** empty log message ***
56 * Revision 1.20 1995/10/27 14:00:12 adam
57 * Implemented detection of database availability.
59 * Revision 1.19 1995/10/17 18:02:11 adam
60 * New feature: databases. Implemented as prefix to words in dictionary.
62 * Revision 1.18 1995/10/16 14:03:09 quinn
63 * Changes to support element set names and espec1
65 * Revision 1.17 1995/10/16 09:32:40 adam
66 * More work on relational op.
68 * Revision 1.16 1995/10/13 12:26:44 adam
69 * Optimization of truncation.
71 * Revision 1.15 1995/10/12 12:40:55 adam
72 * Bug fixes in rpn_prox.
74 * Revision 1.14 1995/10/09 16:18:37 adam
75 * Function dict_lookup_grep got extra client data parameter.
77 * Revision 1.13 1995/10/06 14:38:00 adam
78 * New result set method: r_score.
79 * Local no (sysno) and score is transferred to retrieveCtrl.
81 * Revision 1.12 1995/10/06 13:52:06 adam
82 * Bug fixes. Handler may abort further scanning.
84 * Revision 1.11 1995/10/06 10:43:57 adam
85 * Scan added. 'occurrences' in scan entries not set yet.
87 * Revision 1.10 1995/10/02 16:43:32 quinn
88 * Set default resulting record type in fetch.
90 * Revision 1.9 1995/10/02 15:18:52 adam
91 * New member in recRetrieveCtrl: diagnostic.
93 * Revision 1.8 1995/09/28 09:19:47 adam
94 * xfree/xmalloc used everywhere.
95 * Extract/retrieve method seems to work for text records.
97 * Revision 1.7 1995/09/27 16:17:32 adam
98 * More work on retrieve.
100 * Revision 1.6 1995/09/08 08:53:22 adam
101 * Record buffer maintained in server_info.
103 * Revision 1.5 1995/09/06 16:11:18 adam
104 * Option: only one word key per file.
106 * Revision 1.4 1995/09/06 10:33:04 adam
107 * More work on present. Some log messages removed.
109 * Revision 1.3 1995/09/05 15:28:40 adam
110 * More work on search engine.
112 * Revision 1.2 1995/09/04 12:33:43 adam
113 * Various cleanup. YAZ util used instead.
115 * Revision 1.1 1995/09/04 09:10:41 adam
116 * More work on index add/del/update.
117 * Merge sort implemented.
118 * Initial work on z39 server.
132 ZServerInfo server_info;
134 static int register_lock (ZServerInfo *zi)
137 int state = zebraServerLockGetState(&lastChange);
147 zebraServerLock (state);
148 if (zi->registerState == state)
150 if (zi->registerChange >= lastChange)
152 logf (LOG_LOG, "Register completely updated since last access");
154 else if (zi->registerState == -1)
155 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
158 logf (LOG_LOG, "Register has changed state from %d to %d",
159 zi->registerState, state);
160 zi->registerChange = lastChange;
163 dict_close (zi->wordDict);
164 is_close (zi->wordIsam);
165 rec_close (&zi->records);
168 zi->registerState = state;
169 zi->records = rec_open (0);
170 if (!(zi->wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
172 if (!(zi->wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
173 sizeof (struct it_key))))
178 static void register_unlock (ZServerInfo *zi)
180 static int waitSec = -1;
184 char *s = res_get (common_resource, "debugRequestWait");
192 if (zi->registerState != -1)
193 zebraServerUnlock (zi->registerState);
196 bend_initresult *bend_init (bend_initrequest *q)
198 static bend_initresult r;
199 static char *name = "zserver";
205 logf (LOG_DEBUG, "bend_init");
207 if (!common_resource)
209 struct statserv_options_block *sob;
211 sob = statserv_getcontrol ();
212 logf (LOG_LOG, "Reading resources from %s", sob->configname);
213 if (!(common_resource = res_open (sob->configname)))
215 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
219 data1_tabpath = res_get(common_resource, "profilePath");
220 server_info.sets = NULL;
221 server_info.registerState = -1; /* trigger open of registers! */
222 server_info.registerChange = 0;
224 server_info.records = NULL;
225 server_info.wordDict = NULL;
226 server_info.wordIsam = NULL;
227 server_info.odr = odr_createmem (ODR_ENCODE);
231 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
233 static bend_searchresult r;
239 register_lock (&server_info);
240 odr_reset (server_info.odr);
241 server_info.errCode = 0;
242 server_info.errString = NULL;
244 logf (LOG_LOG, "ResultSet '%s'", q->setname);
245 switch (q->query->which)
248 r.errcode = rpn_search (&server_info, q->query->u.type_1,
249 q->num_bases, q->basenames, q->setname,
251 r.errstring = server_info.errString;
256 register_unlock (&server_info);
260 static int record_ext_read (int fd, char *buf, size_t count)
262 return read (fd, buf, count);
265 static int record_int_pos;
266 static char *record_int_buf;
267 static int record_int_len;
269 static int record_int_read (int fd, char *buf, size_t count)
271 int l = record_int_len - record_int_pos;
274 l = (l < count) ? l : count;
275 memcpy (buf, record_int_buf + record_int_pos, l);
280 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
281 oid_value input_format, Z_RecordComposition *comp,
282 oid_value *output_format, char **rec_bufp,
286 char *fname, *file_type;
288 struct recRetrieveCtrl retrieveCtrl;
291 rec = rec_get (zi->records, sysno);
294 char *msg = "Record is deleted\n";
295 *output_format = VAL_SUTRS;
297 *rec_lenp = strlen (msg);
300 file_type = rec->info[recInfo_fileType];
301 fname = rec->info[recInfo_filename];
303 if (!(rt = recType_byName (file_type, subType)))
305 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
309 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
310 if (rec->size[recInfo_storeData] > 0)
312 retrieveCtrl.readf = record_int_read;
313 record_int_len = rec->size[recInfo_storeData];
314 record_int_buf = rec->info[recInfo_storeData];
316 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
320 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
322 char *msg = "Record doesn't exist\n";
323 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
324 *output_format = VAL_SUTRS;
326 *rec_lenp = strlen (msg);
328 return 0; /* or 14: System error in presenting records */
330 retrieveCtrl.readf = record_ext_read;
332 retrieveCtrl.subType = subType;
333 retrieveCtrl.localno = sysno;
334 retrieveCtrl.score = score;
335 retrieveCtrl.odr = stream;
336 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
337 retrieveCtrl.comp = comp;
338 retrieveCtrl.diagnostic = 0;
339 (*rt->retrieve)(&retrieveCtrl);
340 *output_format = retrieveCtrl.output_format;
341 *rec_bufp = retrieveCtrl.rec_buf;
342 *rec_lenp = retrieveCtrl.rec_len;
343 close (retrieveCtrl.fd);
346 return retrieveCtrl.diagnostic;
349 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
351 static bend_fetchresult r;
353 ZServerSetSysno *records;
355 register_lock (&server_info);
361 odr_reset (server_info.odr);
362 server_info.errCode = 0;
364 positions[0] = q->number;
365 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
368 logf (LOG_DEBUG, "resultSetRecordGet, error");
370 register_unlock (&server_info);
373 if (!records[0].sysno)
376 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
377 register_unlock (&server_info);
380 r.errcode = record_fetch (&server_info, records[0].sysno,
381 records[0].score, q->stream, q->format,
382 q->comp, &r.format, &r.record, &r.len);
383 resultSetSysnoDel (&server_info, records, 1);
384 register_unlock (&server_info);
388 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
390 register_lock (&server_info);
391 register_unlock (&server_info);
395 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
397 static bend_scanresult r;
400 register_lock (&server_info);
401 odr_reset (server_info.odr);
402 server_info.errCode = 0;
403 server_info.errString = 0;
405 r.term_position = q->term_position;
406 r.num_entries = q->num_entries;
407 r.errcode = rpn_scan (&server_info, q->term,
408 q->num_bases, q->basenames,
410 &r.num_entries, &r.entries, &status);
411 r.errstring = server_info.errString;
413 register_unlock (&server_info);
417 void bend_close (void *handle)
419 if (server_info.records)
421 dict_close (server_info.wordDict);
422 is_close (server_info.wordIsam);
423 rec_close (&server_info.records);
424 register_unlock (&server_info);
429 int main (int argc, char **argv)
431 struct statserv_options_block *sob;
433 sob = statserv_getcontrol ();
434 strcpy (sob->configname, FNAME_CONFIG);
435 statserv_setcontrol (sob);
437 return statserv_main (argc, argv);