* OF THIS SOFTWARE.
*
* $Log: backend.h,v $
- * Revision 1.17 1998-01-29 13:15:35 adam
+ * Revision 1.18 1998-02-10 11:03:56 adam
+ * Added support for extended handlers in backend server interface.
+ *
+ * Revision 1.17 1998/01/29 13:15:35 adam
* Implemented sort for the backend interface.
*
* Revision 1.16 1997/09/17 12:10:31 adam
#ifdef __cplusplus
extern "C" {
#endif
+
+typedef struct request *bend_request;
+typedef struct association *bend_association;
-
-typedef struct bend_searchrequest
+/* old search request input */
+typedef struct
{
char *setname; /* name to give to this set */
int replace_set; /* replace set, if it already exists */
ODR stream; /* encoding stream */
} bend_searchrequest;
-typedef struct bend_searchresult
+/* old search request output */
+typedef struct
{
int hits; /* number of hits */
int errcode; /* 0==OK */
char *errstring; /* system error string or NULL */
} bend_searchresult;
+/* extended search handler (rr = request response) */
+typedef struct {
+ char *setname; /* name to give to this set */
+ int replace_set; /* replace set, if it already exists */
+ int num_bases; /* number of databases in list */
+ char **basenames; /* databases to search */
+ Z_Query *query; /* query structure */
+ ODR stream; /* encode stream */
+
+ bend_request request;
+ bend_association association;
+ int *fd;
+ int hits; /* number of hits */
+ int errcode; /* 0==OK */
+ char *errstring; /* system error string or NULL */
+} bend_search_rr;
+
+/* extended present handler. Does not replace bend_fetch. */
+typedef struct {
+ char *setname; /* set name */
+ int start;
+ int number; /* record number */
+ oid_value format; /* One of the CLASS_RECSYN members */
+ Z_RecordComposition *comp; /* Formatting instructions */
+ ODR stream; /* encoding stream - memory source if required */
+ bend_request request;
+ bend_association association;
+
+ int hits; /* number of hits */
+ int errcode; /* 0==OK */
+ char *errstring; /* system error string or NULL */
+} bend_present_rr;
+
YAZ_EXPORT bend_searchresult *bend_search(void *handle, bend_searchrequest *r,
int *fd);
-YAZ_EXPORT bend_searchresult *bend_searchresponse(void *handle);
+YAZ_EXPORT int bend_searchresponse(void *handle, bend_search_rr *bsrr);
-typedef struct bend_fetchrequest
+typedef struct
{
char *setname; /* set name */
int number; /* record number */
ODR stream; /* encoding stream - memory source if required */
} bend_fetchrequest;
-typedef struct bend_fetchresult
+typedef struct
{
char *basename; /* name of database that provided record */
int len; /* length of record or -1 if structured */
int *fd);
YAZ_EXPORT bend_fetchresult *bend_fetchresponse(void *handle);
-typedef struct bend_scanrequest
+typedef struct
{
int num_bases; /* number of elements in databaselist */
char **basenames; /* databases to search */
YAZ_EXPORT void bend_close(void *handle);
-typedef struct bend_sortrequest
+/* sort handler */
+typedef struct bend_sort_rr
{
int num_input_setnames;
char **input_setnames;
char *output_setname;
Z_SortKeySpecList *sort_sequence;
ODR stream;
-} bend_sortrequest;
-typedef struct bend_sortresult
-{
int sort_status;
int errcode;
char *errstring;
-} bend_sortresult;
+} bend_sort_rr;
typedef struct bend_initrequest
{
Z_IdAuthentication *auth;
ODR stream; /* encoding stream */
- int (*bend_sort) (void *handle, bend_sortrequest *req,
- bend_sortresult *res);
+ int (*bend_sort) (void *handle, bend_sort_rr *rr);
+ int (*bend_search) (void *handle, bend_search_rr *rr);
+ int (*bend_present) (void *handle, bend_present_rr *rr);
} bend_initrequest;
typedef struct bend_initresult
void *handle; /* private handle to the backend module */
} bend_initresult;
-YAZ_EXPORT bend_initresult MDF *bend_init(bend_initrequest *r);
+YAZ_EXPORT bend_initresult *bend_init(bend_initrequest *r);
+
+YAZ_EXPORT void bend_request_send (bend_association a, bend_request req,
+ Z_APDU *res);
+
+YAZ_EXPORT bend_request bend_request_mk (bend_association a);
+
+YAZ_EXPORT void bend_request_destroy (bend_request *req);
+
+YAZ_EXPORT Z_ReferenceId *bend_request_getid (ODR odr, bend_request req);
+YAZ_EXPORT int bend_backend_respond (bend_association a, bend_request req);
+YAZ_EXPORT void bend_request_setdata(bend_request r, void *p);
+YAZ_EXPORT void *bend_request_getdata(bend_request r);
#ifdef __cplusplus
}
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: seshigh.c,v $
- * Revision 1.70 1998-01-29 13:15:35 adam
+ * Revision 1.71 1998-02-10 11:03:57 adam
+ * Added support for extended handlers in backend server interface.
+ *
+ * Revision 1.70 1998/01/29 13:15:35 adam
* Implemented sort for the backend interface.
*
* Revision 1.69 1997/09/30 11:48:12 adam
#include <backend.h>
-static int process_request(association *assoc);
+static int process_request(association *assoc, request *req);
void backend_response(IOCHAN i, int event);
static int process_response(association *assoc, request *req, Z_APDU *res);
static Z_APDU *process_initRequest(association *assoc, request *reqb);
static Z_APDU *process_searchRequest(association *assoc, request *reqb,
int *fd);
static Z_APDU *response_searchRequest(association *assoc, request *reqb,
- bend_searchresult *bsrt, int *fd);
+ bend_search_rr *bsrr, int *fd);
static Z_APDU *process_presentRequest(association *assoc, request *reqb,
int *fd);
static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
static void process_close(association *assoc, request *reqb);
+void save_referenceId (request *reqb, Z_ReferenceId *refid);
static FILE *apduf = 0; /* for use in static mode */
static statserv_options_block *control_block = 0;
*/
association *create_association(IOCHAN channel, COMSTACK link)
{
- association *new;
+ association *anew;
if (!control_block)
control_block = statserv_getcontrol();
- if (!(new = xmalloc(sizeof(*new))))
+ if (!(anew = xmalloc(sizeof(*anew))))
return 0;
- new->client_chan = channel;
- new->client_link = link;
- if (!(new->decode = odr_createmem(ODR_DECODE)) ||
- !(new->encode = odr_createmem(ODR_ENCODE)))
+ anew->client_chan = channel;
+ anew->client_link = link;
+ if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
+ !(anew->encode = odr_createmem(ODR_ENCODE)))
return 0;
if (*control_block->apdufile)
{
FILE *f;
strcpy(filename, control_block->apdufile);
- if (!(new->print = odr_createmem(ODR_PRINT)))
+ if (!(anew->print = odr_createmem(ODR_PRINT)))
return 0;
if (*control_block->apdufile != '-')
{
}
setvbuf(f, 0, _IONBF, 0);
}
- odr_setprint(new->print, f);
+ odr_setprint(anew->print, f);
}
}
else
- new->print = 0;
- new->input_buffer = 0;
- new->input_buffer_len = 0;
- new->backend = 0;
- new->state = ASSOC_NEW;
- request_initq(&new->incoming);
- request_initq(&new->outgoing);
- new->proto = cs_getproto(link);
- return new;
+ anew->print = 0;
+ anew->input_buffer = 0;
+ anew->input_buffer_len = 0;
+ anew->backend = 0;
+ anew->state = ASSOC_NEW;
+ request_initq(&anew->incoming);
+ request_initq(&anew->outgoing);
+ anew->proto = cs_getproto(link);
+ return anew;
}
/*
/* can we do something yet? */
req = request_head(&assoc->incoming);
if (req->state == REQUEST_IDLE)
- if (process_request(assoc) < 0)
+ {
+ request_deq(&assoc->incoming);
+ if (process_request(assoc, req) < 0)
do_close(assoc, Z_Close_systemProblem, "Unknown error");
+ }
}
if (event & EVENT_OUTPUT)
{
/*
* Initiate request processing.
*/
-static int process_request(association *assoc)
+static int process_request(association *assoc, request *req)
{
- request *req = request_head(&assoc->incoming);
int fd = -1;
Z_APDU *res;
+ int retval;
- logf(LOG_DEBUG, "process_request");
assert(req && req->state == REQUEST_IDLE);
switch (req->request->which)
{
if (res)
{
logf(LOG_DEBUG, " result immediately available");
- return process_response(assoc, req, res);
+ retval = process_response(assoc, req, res);
}
else if (fd < 0)
{
- logf(LOG_WARN, " bad result");
- return -1;
+ logf(LOG_DEBUG, " result unavailble");
+ retval = 0;
}
else /* no result yet - one will be provided later */
{
if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
abort();
iochan_setdata(chan, assoc);
- return 0;
+ retval = 0;
}
+ return retval;
}
/*
odr_errmsg(odr_geterror(assoc->print)));
odr_reset(assoc->print);
}
- /* change this when we make the backend reentrant */
- if (req == request_head(&assoc->incoming))
- {
- req->state = REQUEST_IDLE;
- request_deq(&assoc->incoming);
- }
+ req->state = REQUEST_IDLE;
request_enq(&assoc->outgoing, req);
/* turn the work over to the ir_session handler */
iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
/* Is there more work to be done? give that to the input handler too */
+#if 1
if (request_head(&assoc->incoming))
+ {
+ logf (LOG_DEBUG, "more work to be done");
iochan_setevent(assoc->client_chan, EVENT_WORK);
+ }
+#endif
return 0;
}
binitreq.configname = "default-config";
binitreq.auth = req->idAuthentication;
binitreq.bend_sort = NULL;
+ binitreq.bend_search = NULL;
+ binitreq.bend_present = NULL;
if (!(binitres = bend_init(&binitreq)))
{
logf(LOG_WARN, "Bad response from backend.");
assoc->backend = binitres->handle;
if ((assoc->bend_sort = binitreq.bend_sort))
logf (LOG_DEBUG, "Sort handler installed");
+ if ((assoc->bend_search = binitreq.bend_search))
+ logf (LOG_DEBUG, "Search handler installed");
+ if ((assoc->bend_present = binitreq.bend_present))
+ logf (LOG_DEBUG, "Present handler installed");
resp->referenceId = req->referenceId;
*options = '\0';
/* let's tell the client what we can do */
int *fd)
{
Z_SearchRequest *req = reqb->request->u.searchRequest;
- bend_searchrequest bsrq;
- bend_searchresult *bsrt;
+ bend_search_rr *bsrr = nmem_malloc (reqb->request_mem, sizeof(*bsrr));
logf(LOG_LOG, "Got SearchRequest.");
- bsrq.setname = req->resultSetName;
- bsrq.replace_set = *req->replaceIndicator;
- bsrq.num_bases = req->num_databaseNames;
- bsrq.basenames = req->databaseNames;
- bsrq.query = req->query;
- bsrq.stream = assoc->encode;
-
- if (!(bsrt = bend_search(assoc->backend, &bsrq, fd)))
- return 0;
- return response_searchRequest(assoc, reqb, bsrt, fd);
+ save_referenceId (reqb, req->referenceId);
+ /* store ref id in request */
+ bsrr->fd = fd;
+ bsrr->request = reqb;
+ bsrr->association = assoc;
+ if (assoc->bend_search)
+ {
+ bsrr->setname = req->resultSetName;
+ bsrr->replace_set = *req->replaceIndicator;
+ bsrr->num_bases = req->num_databaseNames;
+ bsrr->basenames = req->databaseNames;
+ bsrr->query = req->query;
+ bsrr->stream = assoc->encode;
+ bsrr->errcode = 0;
+ bsrr->hits = 0;
+ bsrr->errstring = NULL;
+ (*assoc->bend_search)(assoc->backend, bsrr);
+ if (!bsrr->request)
+ return 0;
+ }
+ else
+ {
+ bend_searchrequest bsrq;
+ bend_searchresult *bsrt;
+
+ bsrq.setname = req->resultSetName;
+ bsrq.replace_set = *req->replaceIndicator;
+ bsrq.num_bases = req->num_databaseNames;
+ bsrq.basenames = req->databaseNames;
+ bsrq.query = req->query;
+ bsrq.stream = assoc->encode;
+ if (!(bsrt = bend_search(assoc->backend, &bsrq, fd)))
+ return 0;
+ bsrr->hits = bsrt->hits;
+ bsrr->errcode = bsrt->errcode;
+ bsrr->errstring = bsrt->errstring;
+ }
+ return response_searchRequest(assoc, reqb, bsrr, fd);
}
-bend_searchresult *bend_searchresponse(void *handle) {return 0;}
+int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
/*
* Prepare a searchresponse based on the backend results. We probably want
* event, and we'll have to get the response for ourselves.
*/
static Z_APDU *response_searchRequest(association *assoc, request *reqb,
- bend_searchresult *bsrt, int *fd)
+ bend_search_rr *bsrt, int *fd)
{
Z_SearchRequest *req = reqb->request->u.searchRequest;
Z_APDU *apdu = odr_malloc (assoc->encode, sizeof(*apdu));
resp->additionalSearchInfo = 0;
resp->otherInfo = 0;
*fd = -1;
- if (!bsrt && !(bsrt = bend_searchresponse(assoc->backend)))
+ if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
{
logf(LOG_FATAL, "Bad result from backend");
return 0;
int *fd)
{
Z_PresentRequest *req = reqb->request->u.presentRequest;
- Z_APDU *apdu = odr_malloc (assoc->encode, sizeof(*apdu));
- Z_PresentResponse *resp = odr_malloc (assoc->encode, sizeof(*resp));
- int *presst = odr_malloc (assoc->encode, sizeof(*presst));
- int *next = odr_malloc (assoc->encode, sizeof(*next));
- int *num = odr_malloc (assoc->encode, sizeof(*num));
oident *prefformat;
oid_value form;
+ Z_APDU *apdu;
+ Z_PresentResponse *resp;
+ int *presst;
+ int *next;
+ int *num;
logf(LOG_LOG, "Got PresentRequest.");
- *presst = 0;
- *next = 0;
- *num = 0;
-
- apdu->which = Z_APDU_presentResponse;
- apdu->u.presentResponse = resp;
- resp->referenceId = req->referenceId;
- resp->otherInfo = 0;
if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
prefformat->oclass != CLASS_RECSYN)
form = VAL_NONE;
else
form = prefformat->value;
+ if (assoc->bend_present)
+ {
+ bend_present_rr *bprr = nmem_malloc (reqb->request_mem, sizeof(*bprr));
+ bprr->setname = req->resultSetId;
+ bprr->start = *req->resultSetStartPoint;
+ bprr->number = *req->numberOfRecordsRequested;
+ bprr->format = form;
+ bprr->comp = req->recordComposition;
+ bprr->stream = assoc->encode;
+ bprr->request = reqb;
+ bprr->association = assoc;
+ bprr->errcode = 0;
+ bprr->errstring = NULL;
+ (*assoc->bend_present)(assoc->backend, bprr);
+
+ if (!bprr->request)
+ return 0;
+ }
+ apdu = odr_malloc (assoc->encode, sizeof(*apdu));
+ resp = odr_malloc (assoc->encode, sizeof(*resp));
+ presst = odr_malloc (assoc->encode, sizeof(*presst));
+ next = odr_malloc (assoc->encode, sizeof(*next));
+ num = odr_malloc (assoc->encode, sizeof(*num));
+ *presst = 0;
+ *next = 0;
*num = *req->numberOfRecordsRequested;
- resp->records = pack_records(assoc, req->resultSetId,
- *req->resultSetStartPoint, num, req->recordComposition, next,
- presst, form);
+
+ apdu->which = Z_APDU_presentResponse;
+ apdu->u.presentResponse = resp;
+ resp->referenceId = req->referenceId;
+ resp->otherInfo = 0;
+
+ resp->records =
+ pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
+ num, req->recordComposition, next, presst, form);
if (!resp->records)
- return 0;
+ return 0;
resp->numberOfRecordsReturned = num;
resp->presentStatus = presst;
resp->nextResultSetPosition = next;
-
+
return apdu;
}
{
Z_SortRequest *req = reqb->request->u.sortRequest;
Z_SortResponse *res = odr_malloc (assoc->encode, sizeof(*res));
- bend_sortrequest bsrq;
- bend_sortresult *bsrt;
+ bend_sort_rr *bsrr = odr_malloc (assoc->encode, sizeof(*bsrr));
+
Z_APDU *apdu = odr_malloc (assoc->encode, sizeof(*apdu));
logf(LOG_LOG, "Got SortRequest.");
- bsrq.num_input_setnames = req->inputResultSetNames->num_strings;
- bsrq.input_setnames = req->inputResultSetNames->strings;
- bsrq.output_setname = req->sortedResultSetName;
- bsrq.sort_sequence = req->sortSequence;
- bsrq.stream = assoc->encode;
+ bsrr->num_input_setnames = req->inputResultSetNames->num_strings;
+ bsrr->input_setnames = req->inputResultSetNames->strings;
+ bsrr->output_setname = req->sortedResultSetName;
+ bsrr->sort_sequence = req->sortSequence;
+ bsrr->stream = assoc->encode;
- bsrt = odr_malloc (assoc->encode, sizeof(*bsrt));
- bsrt->sort_status = Z_SortStatus_failure;
- bsrt->errcode = 0;
- bsrt->errstring = 0;
+ bsrr->sort_status = Z_SortStatus_failure;
+ bsrr->errcode = 0;
+ bsrr->errstring = 0;
- (*assoc->bend_sort)(assoc->backend, &bsrq, bsrt);
+ (*assoc->bend_sort)(assoc->backend, bsrr);
res->referenceId = req->referenceId;
res->sortStatus = odr_malloc (assoc->encode, sizeof(*res->sortStatus));
- *res->sortStatus = bsrt->sort_status;
+ *res->sortStatus = bsrr->sort_status;
res->resultSetStatus = 0;
- if (bsrt->errcode)
- res->diagnostics = diagrecs(assoc, bsrt->errcode, bsrt->errstring);
+ if (bsrr->errcode)
+ res->diagnostics = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
+ else
+ res->diagnostics = 0;
res->otherInfo = 0;
apdu->which = Z_APDU_sortResponse;
assoc->version = 3;
do_close(assoc, Z_Close_finished, "Association terminated by client");
}
+
+void save_referenceId (request *reqb, Z_ReferenceId *refid)
+{
+ if (refid)
+ {
+ reqb->len_refid = refid->len;
+ reqb->refid = nmem_malloc (reqb->request_mem, refid->len);
+ memcpy (reqb->refid, refid->buf, refid->len);
+ }
+ else
+ {
+ reqb->len_refid = 0;
+ reqb->refid = NULL;
+ }
+}
+
+void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
+{
+ process_response (a, req, res);
+}
+
+bend_request bend_request_mk (bend_association a)
+{
+ request *nreq = request_get (&a->outgoing);
+ nreq->request_mem = nmem_create ();
+ return nreq;
+}
+
+Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
+{
+ Z_ReferenceId *id;
+ if (!req->refid)
+ return 0;
+ id = odr_malloc (odr, sizeof(*odr));
+ id->buf = odr_malloc (odr, req->len_refid);
+ id->len = id->size = req->len_refid;
+ memcpy (id->buf, req->refid, req->len_refid);
+ return id;
+}
+
+void bend_request_destroy (bend_request *req)
+{
+ nmem_destroy((*req)->request_mem);
+ request_release(*req);
+ *req = NULL;
+}
+
+int bend_backend_respond (bend_association a, bend_request req)
+{
+ return process_request (a, req);
+}
+
+void bend_request_setdata(bend_request r, void *p)
+{
+ r->clientData = p;
+}
+
+void *bend_request_getdata(bend_request r)
+{
+ return r->clientData;
+}
projects / yaz-moved-to-github.git / commitdiff