2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.30 1995-12-07 17:38:48 adam
8 * Work locking mechanisms for concurrent updates/commit.
10 * Revision 1.29 1995/12/04 14:22:32 adam
11 * Extra arg to recType_byName.
12 * Started work on new regular expression parsed input to
15 * Revision 1.28 1995/11/28 09:09:48 adam
16 * Zebra config renamed.
17 * Use setting 'recordId' to identify record now.
18 * Bug fix in recindex.c: rec_release_blocks was invokeded even
19 * though the blocks were already released.
20 * File traversal properly deletes records when needed.
22 * Revision 1.27 1995/11/27 13:58:54 adam
23 * New option -t. storeStore data implemented in server.
25 * Revision 1.26 1995/11/25 10:24:07 adam
26 * More record fields - they are enumerated now.
27 * New options: flagStoreData flagStoreKey.
29 * Revision 1.25 1995/11/21 15:29:13 adam
30 * Config file 'base' read by default by both indexer and server.
32 * Revision 1.24 1995/11/20 16:59:47 adam
33 * New update method: the 'old' keys are saved for each records.
35 * Revision 1.23 1995/11/16 17:00:56 adam
36 * Better logging of rpn query.
38 * Revision 1.22 1995/11/16 15:34:55 adam
39 * Uses new record management system in both indexer and server.
41 * Revision 1.21 1995/11/01 16:25:52 quinn
42 * *** empty log message ***
44 * Revision 1.20 1995/10/27 14:00:12 adam
45 * Implemented detection of database availability.
47 * Revision 1.19 1995/10/17 18:02:11 adam
48 * New feature: databases. Implemented as prefix to words in dictionary.
50 * Revision 1.18 1995/10/16 14:03:09 quinn
51 * Changes to support element set names and espec1
53 * Revision 1.17 1995/10/16 09:32:40 adam
54 * More work on relational op.
56 * Revision 1.16 1995/10/13 12:26:44 adam
57 * Optimization of truncation.
59 * Revision 1.15 1995/10/12 12:40:55 adam
60 * Bug fixes in rpn_prox.
62 * Revision 1.14 1995/10/09 16:18:37 adam
63 * Function dict_lookup_grep got extra client data parameter.
65 * Revision 1.13 1995/10/06 14:38:00 adam
66 * New result set method: r_score.
67 * Local no (sysno) and score is transferred to retrieveCtrl.
69 * Revision 1.12 1995/10/06 13:52:06 adam
70 * Bug fixes. Handler may abort further scanning.
72 * Revision 1.11 1995/10/06 10:43:57 adam
73 * Scan added. 'occurrences' in scan entries not set yet.
75 * Revision 1.10 1995/10/02 16:43:32 quinn
76 * Set default resulting record type in fetch.
78 * Revision 1.9 1995/10/02 15:18:52 adam
79 * New member in recRetrieveCtrl: diagnostic.
81 * Revision 1.8 1995/09/28 09:19:47 adam
82 * xfree/xmalloc used everywhere.
83 * Extract/retrieve method seems to work for text records.
85 * Revision 1.7 1995/09/27 16:17:32 adam
86 * More work on retrieve.
88 * Revision 1.6 1995/09/08 08:53:22 adam
89 * Record buffer maintained in server_info.
91 * Revision 1.5 1995/09/06 16:11:18 adam
92 * Option: only one word key per file.
94 * Revision 1.4 1995/09/06 10:33:04 adam
95 * More work on present. Some log messages removed.
97 * Revision 1.3 1995/09/05 15:28:40 adam
98 * More work on search engine.
100 * Revision 1.2 1995/09/04 12:33:43 adam
101 * Various cleanup. YAZ util used instead.
103 * Revision 1.1 1995/09/04 09:10:41 adam
104 * More work on index add/del/update.
105 * Merge sort implemented.
106 * Initial work on z39 server.
120 ZServerInfo server_info;
122 static int register_check (ZServerInfo *zi)
124 int state = zebraServerLockGetState();
134 if (zi->registerState == state)
137 zi->registerState = state;
138 if (server_info.records)
140 dict_close (server_info.wordDict);
141 is_close (server_info.wordIsam);
142 rec_close (&server_info.records);
144 /* enable commit if state is 1 */
145 server_info.records = rec_open (0);
146 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
148 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
149 sizeof (struct it_key))))
154 bend_initresult *bend_init (bend_initrequest *q)
156 static bend_initresult r;
157 static char *name = "zserver";
163 logf (LOG_DEBUG, "bend_init");
165 if (!common_resource)
167 struct statserv_options_block *sob;
169 sob = statserv_getcontrol ();
170 logf (LOG_LOG, "Reading resources from %s", sob->configname);
171 if (!(common_resource = res_open (sob->configname)))
173 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
179 data1_tabpath = res_get(common_resource, "profilePath");
180 server_info.sets = NULL;
181 server_info.registerState = -1; /* trigger open of registers! */
183 server_info.records = NULL;
184 server_info.wordDict = NULL;
185 server_info.wordIsam = NULL;
187 server_info.records = rec_open (0);
188 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
190 logf (LOG_WARN, "dict_open fail: word dict");
192 r.errstring = "dict_open fail: word dict";
195 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
196 sizeof (struct it_key))))
198 logf (LOG_WARN, "is_open fail: word isam");
199 dict_close (server_info.wordDict);
201 r.errstring = "is_open fail: word isam";
205 server_info.odr = odr_createmem (ODR_ENCODE);
209 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
211 static bend_searchresult r;
217 register_check (&server_info);
218 odr_reset (server_info.odr);
219 server_info.errCode = 0;
220 server_info.errString = NULL;
222 logf (LOG_LOG, "ResultSet '%s'", q->setname);
223 switch (q->query->which)
226 r.errcode = rpn_search (&server_info, q->query->u.type_1,
227 q->num_bases, q->basenames, q->setname,
229 r.errstring = server_info.errString;
237 static int record_ext_read (int fd, char *buf, size_t count)
239 return read (fd, buf, count);
242 static int record_int_pos;
243 static char *record_int_buf;
244 static int record_int_len;
246 static int record_int_read (int fd, char *buf, size_t count)
248 int l = record_int_len - record_int_pos;
251 l = (l < count) ? l : count;
252 memcpy (buf, record_int_buf + record_int_pos, l);
257 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
258 oid_value input_format, Z_RecordComposition *comp,
259 oid_value *output_format, char **rec_bufp,
263 char *fname, *file_type;
265 struct recRetrieveCtrl retrieveCtrl;
268 rec = rec_get (zi->records, sysno);
269 file_type = rec->info[recInfo_fileType];
270 fname = rec->info[recInfo_filename];
272 if (!(rt = recType_byName (file_type, subType)))
274 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
278 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
279 if (rec->size[recInfo_storeData] > 0)
281 retrieveCtrl.readf = record_int_read;
282 record_int_len = rec->size[recInfo_storeData];
283 record_int_buf = rec->info[recInfo_storeData];
285 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
289 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
291 char *msg = "Record doesn't exist";
292 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
293 *output_format = VAL_SUTRS;
295 *rec_lenp = strlen (msg);
297 return 0; /* or 14: System error in presenting records */
299 retrieveCtrl.readf = record_ext_read;
301 retrieveCtrl.subType = subType;
302 retrieveCtrl.localno = sysno;
303 retrieveCtrl.score = score;
304 retrieveCtrl.odr = stream;
305 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
306 retrieveCtrl.comp = comp;
307 retrieveCtrl.diagnostic = 0;
308 (*rt->retrieve)(&retrieveCtrl);
309 *output_format = retrieveCtrl.output_format;
310 *rec_bufp = retrieveCtrl.rec_buf;
311 *rec_lenp = retrieveCtrl.rec_len;
312 close (retrieveCtrl.fd);
315 return retrieveCtrl.diagnostic;
318 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
320 static bend_fetchresult r;
322 ZServerSetSysno *records;
324 register_check (&server_info);
330 odr_reset (server_info.odr);
331 server_info.errCode = 0;
333 positions[0] = q->number;
334 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
337 logf (LOG_DEBUG, "resultSetRecordGet, error");
341 if (!records[0].sysno)
344 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
347 r.errcode = record_fetch (&server_info, records[0].sysno,
348 records[0].score, q->stream, q->format,
349 q->comp, &r.format, &r.record, &r.len);
350 resultSetSysnoDel (&server_info, records, 1);
354 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
356 register_check (&server_info);
360 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
362 static bend_scanresult r;
365 register_check (&server_info);
366 odr_reset (server_info.odr);
367 server_info.errCode = 0;
368 server_info.errString = 0;
370 r.term_position = q->term_position;
371 r.num_entries = q->num_entries;
372 r.errcode = rpn_scan (&server_info, q->term,
373 q->num_bases, q->basenames,
375 &r.num_entries, &r.entries, &status);
376 r.errstring = server_info.errString;
381 void bend_close (void *handle)
383 if (server_info.records)
385 dict_close (server_info.wordDict);
386 is_close (server_info.wordIsam);
387 rec_close (&server_info.records);
389 zebraServerUnlock ();
393 int main (int argc, char **argv)
395 struct statserv_options_block *sob;
397 sob = statserv_getcontrol ();
398 strcpy (sob->configname, FNAME_CONFIG);
399 statserv_setcontrol (sob);
401 return statserv_main (argc, argv);