2 * Copyright (c) 2000-2004, Index Data.
3 * See the file LICENSE for details.
5 * $Id: yaz-z-server-sr.cpp,v 1.8 2004-12-13 20:50:54 adam Exp $
10 #include <yaz++/z-server.h>
12 Z_Records *Yaz_Facility_Retrieval::pack_records (Yaz_Z_Server *s,
13 const char *resultSetName,
15 Z_RecordComposition *comp,
19 int recno, total_length = 0, toget = xnum, dumped_records = 0;
21 (Z_Records *) odr_malloc (odr_encode(), sizeof(*records));
22 Z_NamePlusRecordList *reclist =
23 (Z_NamePlusRecordList *) odr_malloc (odr_encode(), sizeof(*reclist));
24 Z_NamePlusRecord **list =
25 (Z_NamePlusRecord **) odr_malloc (odr_encode(), sizeof(*list) * toget);
27 records->which = Z_Records_DBOSD;
28 records->u.databaseOrSurDiagnostics = reclist;
29 reclist->num_records = 0;
30 reclist->records = list;
31 *pres = Z_PRES_SUCCESS;
34 for (recno = start; reclist->num_records < toget; recno++)
36 Z_NamePlusRecord *this_rec =
37 (Z_NamePlusRecord *) odr_malloc (odr_encode(), sizeof(*this_rec));
38 this_rec->databaseName = 0;
39 this_rec->which = Z_NamePlusRecord_databaseRecord;
40 this_rec->u.databaseRecord = 0;
44 sr_record (resultSetName, recno, format, comp, this_rec, records);
46 if (records->which != Z_Records_DBOSD)
48 *pres = Z_PRES_FAILURE;
52 if (this_rec->which == Z_NamePlusRecord_databaseRecord &&
53 this_rec->u.databaseRecord == 0)
54 { // handler did not return a record..
55 create_surrogateDiagnostics(odr_encode(), this_rec, 0, 14, 0);
58 * we get the number of bytes allocated on the stream before any
59 * allocation done by the backend - this should give us a reasonable
60 * idea of the total size of the data so far.
62 total_length = odr_total(odr_encode()) - dumped_records;
63 this_length = odr_total(odr_encode()) - total_length;
64 if (this_length + total_length > m_preferredMessageSize)
66 /* record is small enough, really */
67 if (this_length <= m_preferredMessageSize)
69 *pres = Z_PRES_PARTIAL_2;
72 if (this_length >= m_maximumRecordSize)
73 { /* too big entirely */
74 reclist->records[reclist->num_records] = this_rec;
75 create_surrogateDiagnostics(odr_encode(), this_rec,
76 this_rec->databaseName, 17, 0);
77 reclist->num_records++;
79 dumped_records += this_length;
82 else /* record can only be fetched by itself */
86 yaz_log(YLOG_DEBUG, " Dropped it");
87 reclist->records[reclist->num_records] = this_rec;
88 create_surrogateDiagnostics(odr_encode(), this_rec,
89 this_rec->databaseName,
91 reclist->num_records++;
92 // *next = freq.last_in_set ? 0 : recno + 1;
94 dumped_records += this_length;
99 reclist->records[reclist->num_records] = this_rec;
100 reclist->num_records++;
106 void Yaz_Facility_Retrieval::fetch_via_piggyback (Yaz_Z_Server *s,
107 Z_SearchRequest *req,
108 Z_SearchResponse *res)
110 bool_t *sr = (bool_t *)odr_malloc (odr_encode(), sizeof(*sr));
115 Z_RecordComposition comp, *compp = 0;
116 int hits = *res->resultCount;
118 int *nulint = (int *)odr_malloc (odr_encode(), sizeof(*nulint));
121 comp.which = Z_RecordComp_simple;
122 /* how many records does the user agent want, then? */
123 if (hits <= *req->smallSetUpperBound)
126 if ((comp.u.simple = req->smallSetElementSetNames))
129 else if (hits < *req->largeSetLowerBound)
131 toget = *req->mediumSetPresentNumber;
134 if ((comp.u.simple = req->mediumSetElementSetNames))
138 if (toget && !res->records)
140 res->presentStatus = (int *) odr_malloc (odr_encode(), sizeof(int));
141 *res->presentStatus = Z_PRES_SUCCESS;
143 pack_records(s, req->resultSetName, 1, toget, compp,
144 res->nextResultSetPosition,
146 req->preferredRecordSyntax);
149 if (res->records->which == Z_Records_DBOSD)
150 *res->numberOfRecordsReturned =
151 res->records->u.databaseOrSurDiagnostics->num_records;
152 res->searchStatus = sr;
153 res->resultSetStatus = 0;
158 *res->nextResultSetPosition = 1;
159 res->numberOfRecordsReturned = nulint;
160 res->searchStatus = sr;
161 res->resultSetStatus = 0;
162 res->presentStatus = 0;
166 void Yaz_Facility_Retrieval::fetch_via_present (Yaz_Z_Server *s,
167 Z_PresentRequest *req,
168 Z_PresentResponse *res)
171 pack_records (s, req->resultSetId,*req->resultSetStartPoint,
172 *req->numberOfRecordsRequested,
173 req->recordComposition,
174 res->nextResultSetPosition,
176 req->preferredRecordSyntax);
177 if (res->records->which == Z_Records_DBOSD)
178 *res->numberOfRecordsReturned =
179 res->records->u.databaseOrSurDiagnostics->num_records;
182 int Yaz_Facility_Retrieval::init(Yaz_Z_Server *s, Z_InitRequest *initRequest,
183 Z_InitResponse *initResponse)
185 Z_Options *req = initRequest->options;
186 Z_Options *res = initResponse->options;
188 if (ODR_MASK_GET(req, Z_Options_search))
189 ODR_MASK_SET(res, Z_Options_search);
190 if (ODR_MASK_GET(req, Z_Options_present))
191 ODR_MASK_SET(res, Z_Options_present);
192 m_preferredMessageSize = *initRequest->preferredMessageSize;
193 m_maximumRecordSize = *initRequest->maximumRecordSize;
194 return sr_init (initRequest, initResponse);
197 ODR Yaz_Facility_Retrieval::odr_encode()
202 ODR Yaz_Facility_Retrieval::odr_decode()
207 int Yaz_Facility_Retrieval::recv(Yaz_Z_Server *s, Z_APDU *apdu_request)
209 Z_APDU *apdu_response;
210 m_odr_encode = s->odr_encode();
211 m_odr_decode = s->odr_decode();
212 switch (apdu_request->which)
214 case Z_APDU_searchRequest:
215 apdu_response = s->create_Z_PDU(Z_APDU_searchResponse);
216 s->transfer_referenceId(apdu_request, apdu_response);
217 sr_search (apdu_request->u.searchRequest,
218 apdu_response->u.searchResponse);
219 if (!apdu_response->u.searchResponse->records)
221 fetch_via_piggyback(s, apdu_request->u.searchRequest,
222 apdu_response->u.searchResponse);
224 s->send_Z_PDU(apdu_response, 0);
226 case Z_APDU_presentRequest:
227 apdu_response = s->create_Z_PDU(Z_APDU_presentResponse);
228 s->transfer_referenceId(apdu_request, apdu_response);
229 sr_present (apdu_request->u.presentRequest,
230 apdu_response->u.presentResponse);
231 if (!apdu_response->u.presentResponse->records)
232 fetch_via_present(s, apdu_request->u.presentRequest,
233 apdu_response->u.presentResponse);
234 s->send_Z_PDU(apdu_response, 0);