2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.31 1995-12-08 16:22:56 adam
8 * Work on update while servers are running. Three lock files introduced.
9 * The servers reload their registers when necessary, but they don't
10 * reestablish result sets yet.
12 * Revision 1.30 1995/12/07 17:38:48 adam
13 * Work locking mechanisms for concurrent updates/commit.
15 * Revision 1.29 1995/12/04 14:22:32 adam
16 * Extra arg to recType_byName.
17 * Started work on new regular expression parsed input to
20 * Revision 1.28 1995/11/28 09:09:48 adam
21 * Zebra config renamed.
22 * Use setting 'recordId' to identify record now.
23 * Bug fix in recindex.c: rec_release_blocks was invokeded even
24 * though the blocks were already released.
25 * File traversal properly deletes records when needed.
27 * Revision 1.27 1995/11/27 13:58:54 adam
28 * New option -t. storeStore data implemented in server.
30 * Revision 1.26 1995/11/25 10:24:07 adam
31 * More record fields - they are enumerated now.
32 * New options: flagStoreData flagStoreKey.
34 * Revision 1.25 1995/11/21 15:29:13 adam
35 * Config file 'base' read by default by both indexer and server.
37 * Revision 1.24 1995/11/20 16:59:47 adam
38 * New update method: the 'old' keys are saved for each records.
40 * Revision 1.23 1995/11/16 17:00:56 adam
41 * Better logging of rpn query.
43 * Revision 1.22 1995/11/16 15:34:55 adam
44 * Uses new record management system in both indexer and server.
46 * Revision 1.21 1995/11/01 16:25:52 quinn
47 * *** empty log message ***
49 * Revision 1.20 1995/10/27 14:00:12 adam
50 * Implemented detection of database availability.
52 * Revision 1.19 1995/10/17 18:02:11 adam
53 * New feature: databases. Implemented as prefix to words in dictionary.
55 * Revision 1.18 1995/10/16 14:03:09 quinn
56 * Changes to support element set names and espec1
58 * Revision 1.17 1995/10/16 09:32:40 adam
59 * More work on relational op.
61 * Revision 1.16 1995/10/13 12:26:44 adam
62 * Optimization of truncation.
64 * Revision 1.15 1995/10/12 12:40:55 adam
65 * Bug fixes in rpn_prox.
67 * Revision 1.14 1995/10/09 16:18:37 adam
68 * Function dict_lookup_grep got extra client data parameter.
70 * Revision 1.13 1995/10/06 14:38:00 adam
71 * New result set method: r_score.
72 * Local no (sysno) and score is transferred to retrieveCtrl.
74 * Revision 1.12 1995/10/06 13:52:06 adam
75 * Bug fixes. Handler may abort further scanning.
77 * Revision 1.11 1995/10/06 10:43:57 adam
78 * Scan added. 'occurrences' in scan entries not set yet.
80 * Revision 1.10 1995/10/02 16:43:32 quinn
81 * Set default resulting record type in fetch.
83 * Revision 1.9 1995/10/02 15:18:52 adam
84 * New member in recRetrieveCtrl: diagnostic.
86 * Revision 1.8 1995/09/28 09:19:47 adam
87 * xfree/xmalloc used everywhere.
88 * Extract/retrieve method seems to work for text records.
90 * Revision 1.7 1995/09/27 16:17:32 adam
91 * More work on retrieve.
93 * Revision 1.6 1995/09/08 08:53:22 adam
94 * Record buffer maintained in server_info.
96 * Revision 1.5 1995/09/06 16:11:18 adam
97 * Option: only one word key per file.
99 * Revision 1.4 1995/09/06 10:33:04 adam
100 * More work on present. Some log messages removed.
102 * Revision 1.3 1995/09/05 15:28:40 adam
103 * More work on search engine.
105 * Revision 1.2 1995/09/04 12:33:43 adam
106 * Various cleanup. YAZ util used instead.
108 * Revision 1.1 1995/09/04 09:10:41 adam
109 * More work on index add/del/update.
110 * Merge sort implemented.
111 * Initial work on z39 server.
125 ZServerInfo server_info;
127 static int register_lock (ZServerInfo *zi)
130 int state = zebraServerLockGetState(&lastChange);
140 zebraServerLock (state);
141 if (zi->registerState == state)
143 if (zi->registerChange >= lastChange)
145 logf (LOG_LOG, "Register completely updated since last access");
147 else if (zi->registerState == -1)
148 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
151 logf (LOG_LOG, "Register has changed state from %d to %d",
152 zi->registerState, state);
153 zi->registerChange = lastChange;
156 dict_close (zi->wordDict);
157 is_close (zi->wordIsam);
158 rec_close (&zi->records);
161 zi->registerState = state;
162 zi->records = rec_open (0);
163 if (!(zi->wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
165 if (!(zi->wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
166 sizeof (struct it_key))))
171 static int register_unlock (ZServerInfo *zi)
173 if (zi->registerState != -1)
174 zebraServerUnlock (zi->registerState);
177 bend_initresult *bend_init (bend_initrequest *q)
179 static bend_initresult r;
180 static char *name = "zserver";
186 logf (LOG_DEBUG, "bend_init");
188 if (!common_resource)
190 struct statserv_options_block *sob;
192 sob = statserv_getcontrol ();
193 logf (LOG_LOG, "Reading resources from %s", sob->configname);
194 if (!(common_resource = res_open (sob->configname)))
196 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
200 data1_tabpath = res_get(common_resource, "profilePath");
201 server_info.sets = NULL;
202 server_info.registerState = -1; /* trigger open of registers! */
203 server_info.registerChange = 0;
205 server_info.records = NULL;
206 server_info.wordDict = NULL;
207 server_info.wordIsam = NULL;
208 server_info.odr = odr_createmem (ODR_ENCODE);
212 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
214 static bend_searchresult r;
220 register_lock (&server_info);
221 odr_reset (server_info.odr);
222 server_info.errCode = 0;
223 server_info.errString = NULL;
225 logf (LOG_LOG, "ResultSet '%s'", q->setname);
226 switch (q->query->which)
229 r.errcode = rpn_search (&server_info, q->query->u.type_1,
230 q->num_bases, q->basenames, q->setname,
232 r.errstring = server_info.errString;
237 register_unlock (&server_info);
241 static int record_ext_read (int fd, char *buf, size_t count)
243 return read (fd, buf, count);
246 static int record_int_pos;
247 static char *record_int_buf;
248 static int record_int_len;
250 static int record_int_read (int fd, char *buf, size_t count)
252 int l = record_int_len - record_int_pos;
255 l = (l < count) ? l : count;
256 memcpy (buf, record_int_buf + record_int_pos, l);
261 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
262 oid_value input_format, Z_RecordComposition *comp,
263 oid_value *output_format, char **rec_bufp,
267 char *fname, *file_type;
269 struct recRetrieveCtrl retrieveCtrl;
272 rec = rec_get (zi->records, sysno);
273 file_type = rec->info[recInfo_fileType];
274 fname = rec->info[recInfo_filename];
276 if (!(rt = recType_byName (file_type, subType)))
278 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
282 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
283 if (rec->size[recInfo_storeData] > 0)
285 retrieveCtrl.readf = record_int_read;
286 record_int_len = rec->size[recInfo_storeData];
287 record_int_buf = rec->info[recInfo_storeData];
289 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
293 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
295 char *msg = "Record doesn't exist";
296 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
297 *output_format = VAL_SUTRS;
299 *rec_lenp = strlen (msg);
301 return 0; /* or 14: System error in presenting records */
303 retrieveCtrl.readf = record_ext_read;
305 retrieveCtrl.subType = subType;
306 retrieveCtrl.localno = sysno;
307 retrieveCtrl.score = score;
308 retrieveCtrl.odr = stream;
309 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
310 retrieveCtrl.comp = comp;
311 retrieveCtrl.diagnostic = 0;
312 (*rt->retrieve)(&retrieveCtrl);
313 *output_format = retrieveCtrl.output_format;
314 *rec_bufp = retrieveCtrl.rec_buf;
315 *rec_lenp = retrieveCtrl.rec_len;
316 close (retrieveCtrl.fd);
319 return retrieveCtrl.diagnostic;
322 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
324 static bend_fetchresult r;
326 ZServerSetSysno *records;
328 register_lock (&server_info);
334 odr_reset (server_info.odr);
335 server_info.errCode = 0;
337 positions[0] = q->number;
338 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
341 logf (LOG_DEBUG, "resultSetRecordGet, error");
343 register_unlock (&server_info);
346 if (!records[0].sysno)
349 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
350 register_unlock (&server_info);
353 r.errcode = record_fetch (&server_info, records[0].sysno,
354 records[0].score, q->stream, q->format,
355 q->comp, &r.format, &r.record, &r.len);
356 resultSetSysnoDel (&server_info, records, 1);
357 register_unlock (&server_info);
361 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
363 register_lock (&server_info);
364 register_unlock (&server_info);
368 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
370 static bend_scanresult r;
373 register_lock (&server_info);
374 odr_reset (server_info.odr);
375 server_info.errCode = 0;
376 server_info.errString = 0;
378 r.term_position = q->term_position;
379 r.num_entries = q->num_entries;
380 r.errcode = rpn_scan (&server_info, q->term,
381 q->num_bases, q->basenames,
383 &r.num_entries, &r.entries, &status);
384 r.errstring = server_info.errString;
386 register_unlock (&server_info);
390 void bend_close (void *handle)
392 if (server_info.records)
394 dict_close (server_info.wordDict);
395 is_close (server_info.wordIsam);
396 rec_close (&server_info.records);
397 register_unlock (&server_info);
402 int main (int argc, char **argv)
404 struct statserv_options_block *sob;
406 sob = statserv_getcontrol ();
407 strcpy (sob->configname, FNAME_CONFIG);
408 statserv_setcontrol (sob);
410 return statserv_main (argc, argv);