2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.25 1995-11-21 15:29:13 adam
8 * Config file 'base' read by default by both indexer and server.
10 * Revision 1.24 1995/11/20 16:59:47 adam
11 * New update method: the 'old' keys are saved for each records.
13 * Revision 1.23 1995/11/16 17:00:56 adam
14 * Better logging of rpn query.
16 * Revision 1.22 1995/11/16 15:34:55 adam
17 * Uses new record management system in both indexer and server.
19 * Revision 1.21 1995/11/01 16:25:52 quinn
20 * *** empty log message ***
22 * Revision 1.20 1995/10/27 14:00:12 adam
23 * Implemented detection of database availability.
25 * Revision 1.19 1995/10/17 18:02:11 adam
26 * New feature: databases. Implemented as prefix to words in dictionary.
28 * Revision 1.18 1995/10/16 14:03:09 quinn
29 * Changes to support element set names and espec1
31 * Revision 1.17 1995/10/16 09:32:40 adam
32 * More work on relational op.
34 * Revision 1.16 1995/10/13 12:26:44 adam
35 * Optimization of truncation.
37 * Revision 1.15 1995/10/12 12:40:55 adam
38 * Bug fixes in rpn_prox.
40 * Revision 1.14 1995/10/09 16:18:37 adam
41 * Function dict_lookup_grep got extra client data parameter.
43 * Revision 1.13 1995/10/06 14:38:00 adam
44 * New result set method: r_score.
45 * Local no (sysno) and score is transferred to retrieveCtrl.
47 * Revision 1.12 1995/10/06 13:52:06 adam
48 * Bug fixes. Handler may abort further scanning.
50 * Revision 1.11 1995/10/06 10:43:57 adam
51 * Scan added. 'occurrences' in scan entries not set yet.
53 * Revision 1.10 1995/10/02 16:43:32 quinn
54 * Set default resulting record type in fetch.
56 * Revision 1.9 1995/10/02 15:18:52 adam
57 * New member in recRetrieveCtrl: diagnostic.
59 * Revision 1.8 1995/09/28 09:19:47 adam
60 * xfree/xmalloc used everywhere.
61 * Extract/retrieve method seems to work for text records.
63 * Revision 1.7 1995/09/27 16:17:32 adam
64 * More work on retrieve.
66 * Revision 1.6 1995/09/08 08:53:22 adam
67 * Record buffer maintained in server_info.
69 * Revision 1.5 1995/09/06 16:11:18 adam
70 * Option: only one word key per file.
72 * Revision 1.4 1995/09/06 10:33:04 adam
73 * More work on present. Some log messages removed.
75 * Revision 1.3 1995/09/05 15:28:40 adam
76 * More work on search engine.
78 * Revision 1.2 1995/09/04 12:33:43 adam
79 * Various cleanup. YAZ util used instead.
81 * Revision 1.1 1995/09/04 09:10:41 adam
82 * More work on index add/del/update.
83 * Merge sort implemented.
84 * Initial work on z39 server.
98 ZServerInfo server_info;
100 bend_initresult *bend_init (bend_initrequest *q)
102 static bend_initresult r;
103 static char *name = "zserver";
109 logf (LOG_DEBUG, "bend_init");
111 if (!common_resource)
113 struct statserv_options_block *sob;
115 sob = statserv_getcontrol ();
116 logf (LOG_LOG, "Reading resources from %s", sob->configname);
117 if (!(common_resource = res_open (sob->configname)))
119 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
124 data1_tabpath = res_get(common_resource, "data1_tabpath");
125 server_info.sets = NULL;
127 server_info.records = rec_open (0);
128 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
130 logf (LOG_WARN, "dict_open fail: word dict");
132 r.errstring = "dict_open fail: word dict";
135 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
136 sizeof (struct it_key))))
138 logf (LOG_WARN, "is_open fail: word isam");
139 dict_close (server_info.wordDict);
141 r.errstring = "is_open fail: word isam";
144 server_info.odr = odr_createmem (ODR_ENCODE);
148 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
150 static bend_searchresult r;
157 odr_reset (server_info.odr);
158 server_info.errCode = 0;
159 server_info.errString = NULL;
161 logf (LOG_LOG, "ResultSet '%s'", q->setname);
162 switch (q->query->which)
165 r.errcode = rpn_search (&server_info, q->query->u.type_1,
166 q->num_bases, q->basenames, q->setname,
168 r.errstring = server_info.errString;
176 static int record_read (int fd, char *buf, size_t count)
178 return read (fd, buf, count);
181 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
182 oid_value input_format, Z_RecordComposition *comp,
183 oid_value *output_format, char **rec_bufp,
187 char *fname, *file_type;
189 struct recRetrieveCtrl retrieveCtrl;
191 rec = rec_get (zi->records, sysno);
192 file_type = rec->info[0];
193 fname = rec->info[1];
195 if (!(rt = recType_byName (file_type)))
197 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
201 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
202 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
204 char *msg = "Record doesn't exist";
205 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
206 *output_format = VAL_SUTRS;
208 *rec_lenp = strlen (msg);
210 return 0; /* or 14: System error in presenting records */
212 retrieveCtrl.localno = sysno;
213 retrieveCtrl.score = score;
214 retrieveCtrl.odr = stream;
215 retrieveCtrl.readf = record_read;
216 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
217 retrieveCtrl.comp = comp;
218 retrieveCtrl.diagnostic = 0;
219 (*rt->retrieve)(&retrieveCtrl);
220 *output_format = retrieveCtrl.output_format;
221 *rec_bufp = retrieveCtrl.rec_buf;
222 *rec_lenp = retrieveCtrl.rec_len;
223 close (retrieveCtrl.fd);
226 return retrieveCtrl.diagnostic;
229 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
231 static bend_fetchresult r;
233 ZServerSetSysno *records;
239 odr_reset (server_info.odr);
240 server_info.errCode = 0;
242 positions[0] = q->number;
243 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
246 logf (LOG_DEBUG, "resultSetRecordGet, error");
250 if (!records[0].sysno)
253 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
256 r.errcode = record_fetch (&server_info, records[0].sysno,
257 records[0].score, q->stream, q->format,
258 q->comp, &r.format, &r.record, &r.len);
259 resultSetSysnoDel (&server_info, records, 1);
263 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
268 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
270 static bend_scanresult r;
273 odr_reset (server_info.odr);
274 server_info.errCode = 0;
275 server_info.errString = 0;
277 r.term_position = q->term_position;
278 r.num_entries = q->num_entries;
279 r.errcode = rpn_scan (&server_info, q->term,
280 q->num_bases, q->basenames,
282 &r.num_entries, &r.entries, &status);
283 r.errstring = server_info.errString;
288 void bend_close (void *handle)
290 dict_close (server_info.wordDict);
291 is_close (server_info.wordIsam);
292 rec_close (&server_info.records);
296 int main (int argc, char **argv)
298 struct statserv_options_block *sob;
300 sob = statserv_getcontrol ();
301 strcpy (sob->configname, "base");
302 statserv_setcontrol (sob);
304 return statserv_main (argc, argv);