/*
- * Copyright (c) 1998-2001, Index Data.
+ * Copyright (c) 1998-2003, Index Data.
* See the file LICENSE for details.
*
- * $Id: yaz-proxy.cpp,v 1.32 2002-08-28 13:01:41 adam Exp $
+ * $Id: yaz-proxy.cpp,v 1.45 2003-07-25 08:57:01 adam Exp $
*/
#include <assert.h>
#include <time.h>
#include <yaz/log.h>
-#include <yaz++/yaz-proxy.h>
+#include <yaz++/proxy.h>
Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable) :
Yaz_Z_Assoc(the_PDU_Observable)
m_proxy_authentication = 0;
m_max_clients = 50;
m_seed = time(0);
+ m_idletime = 600;
m_optimize = xstrdup ("1");
}
{
Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable);
new_proxy->m_parent = this;
- new_proxy->timeout(500);
+ new_proxy->timeout(m_idletime);
new_proxy->set_proxy_target(m_proxyTarget);
new_proxy->set_APDU_log(get_APDU_log());
new_proxy->set_proxy_authentication(m_proxy_authentication);
c->m_init_flag = 0;
c->m_last_ok = 0;
+ c->m_cache.clear();
c->m_last_resultCount = 0;
c->m_sr_transform = 0;
c->m_waiting = 0;
- c->timeout(600);
+ c->m_resultSetStartPoint = 0;
+ c->timeout(m_idletime);
}
c->m_seqno = parent->m_seqno;
if (c->m_server && c->m_server != this)
c->m_server->m_client = 0;
c->m_server = this;
- c->m_seqno = parent->m_seqno;
(parent->m_seqno)++;
yaz_log (LOG_DEBUG, "get_client 1 %p %p", this, c);
return c;
}
}
+ else if (!c)
+ {
+ Yaz_ProxyClient *cc = 0;
+
+ for (c = parent->m_clientPool; c; c = c->m_next)
+ {
+ assert (c->m_prev);
+ assert (*c->m_prev == c);
+ if (c->m_server == 0 && c->m_cookie[0] == 0 &&
+ !strcmp(m_proxyTarget, c->get_hostname()))
+ {
+ cc = c;
+ }
+ }
+ if (cc)
+ {
+ // found it in cache
+ c = cc;
+
+ yaz_log (LOG_LOG, "Reuse session %d to %d %s",
+ c->m_seqno, parent->m_seqno, c->get_hostname());
+
+ c->m_seqno = parent->m_seqno;
+ assert(c->m_server == 0);
+ c->m_server = this;
+
+ (parent->m_seqno)++;
+ return c;
+ }
+ }
if (!m_client)
{
if (apdu->which != Z_APDU_initRequest)
Yaz_ProxyClient *c_min = 0;
int min_seq = -1;
int no_of_clients = 0;
- yaz_log (LOG_LOG, "Existing sessions");
+ if (parent->m_clientPool)
+ yaz_log (LOG_LOG, "Existing sessions");
for (c = parent->m_clientPool; c; c = c->m_next)
{
yaz_log (LOG_LOG, " Session %-3d wait=%d %s", c->m_seqno,
}
else
{
- yaz_log (LOG_LOG, "Reuse session %d to %d",
- c->m_seqno, parent->m_seqno);
+ yaz_log (LOG_LOG, "Move session %d to %d %s",
+ c->m_seqno, parent->m_seqno, c->get_hostname());
if (cookie)
strcpy (c->m_cookie, cookie);
else
c->m_init_flag = 0;
c->m_last_resultCount = 0;
c->m_last_ok = 0;
+ c->m_cache.clear();
c->m_sr_transform = 0;
c->m_waiting = 0;
- c->timeout(10);
+ c->m_resultSetStartPoint = 0;
+ c->timeout(20);
(parent->m_seqno)++;
}
Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
{
+ if (*m_parent->m_optimize == '0')
+ return apdu; // don't optimize result sets..
+ if (apdu->which == Z_APDU_presentRequest)
+ {
+ Z_PresentRequest *pr = apdu->u.presentRequest;
+ Z_NamePlusRecordList *npr;
+ int toget = *pr->numberOfRecordsRequested;
+ int start = *pr->resultSetStartPoint;
+
+ if (m_client->m_last_resultSetId &&
+ !strcmp(m_client->m_last_resultSetId, pr->resultSetId))
+ {
+ if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
+ pr->preferredRecordSyntax,
+ pr->recordComposition))
+ {
+ yaz_log (LOG_LOG, "Returned cache records for present request");
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
+ new_apdu->u.presentResponse->referenceId = pr->referenceId;
+
+ new_apdu->u.presentResponse->numberOfRecordsReturned
+ = odr_intdup(odr_encode(), toget);
+
+ new_apdu->u.presentResponse->records = (Z_Records*)
+ odr_malloc(odr_encode(), sizeof(Z_Records));
+ new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
+ new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
+ new_apdu->u.presentResponse->nextResultSetPosition =
+ odr_intdup(odr_encode(), start+toget);
+ send_Z_PDU(new_apdu);
+ return 0;
+ }
+ }
+ }
+
if (apdu->which != Z_APDU_searchRequest)
return apdu;
- if (*m_parent->m_optimize != '1')
- return apdu;
Z_SearchRequest *sr = apdu->u.searchRequest;
Yaz_Z_Query *this_query = new Yaz_Z_Query;
Yaz_Z_Databases this_databases;
if (m_client->m_last_ok && m_client->m_last_query &&
m_client->m_last_query->match(this_query) &&
+ !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
m_client->m_last_databases.match(this_databases))
{
delete this_query;
if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
m_client->m_last_resultCount < *sr->largeSetLowerBound)
{
- // medium Set
- // send present request (medium size)
- yaz_log (LOG_LOG, "Optimizing search for medium set");
- Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
- Z_PresentRequest *pr = new_apdu->u.presentRequest;
- pr->referenceId = sr->referenceId;
- pr->resultSetId = sr->resultSetName;
- pr->preferredRecordSyntax = sr->preferredRecordSyntax;
- *pr->numberOfRecordsRequested = *sr->mediumSetPresentNumber;
+ Z_NamePlusRecordList *npr;
+ int toget = *sr->mediumSetPresentNumber;
+ Z_RecordComposition *comp = 0;
+
+ if (toget > m_client->m_last_resultCount)
+ toget = m_client->m_last_resultCount;
+
if (sr->mediumSetElementSetNames)
{
- pr->recordComposition = (Z_RecordComposition *)
+ comp = (Z_RecordComposition *)
odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
- pr->recordComposition->which = Z_RecordComp_simple;
- pr->recordComposition->u.simple = sr->mediumSetElementSetNames;
+ comp->which = Z_RecordComp_simple;
+ comp->u.simple = sr->mediumSetElementSetNames;
+ }
+
+ if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
+ sr->preferredRecordSyntax, comp))
+ {
+ yaz_log (LOG_LOG, "Returned cache records for medium set");
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+ new_apdu->u.searchResponse->referenceId = sr->referenceId;
+ new_apdu->u.searchResponse->resultCount =
+ &m_client->m_last_resultCount;
+
+ new_apdu->u.searchResponse->numberOfRecordsReturned
+ = odr_intdup(odr_encode(), toget);
+
+ new_apdu->u.searchResponse->presentStatus =
+ odr_intdup(odr_encode(), Z_PresentStatus_success);
+ new_apdu->u.searchResponse->records = (Z_Records*)
+ odr_malloc(odr_encode(), sizeof(Z_Records));
+ new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
+ new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
+ new_apdu->u.searchResponse->nextResultSetPosition =
+ odr_intdup(odr_encode(), toget+1);
+ send_Z_PDU(new_apdu);
+ return 0;
+ }
+ else
+ {
+ // medium Set
+ // send present request (medium size)
+ yaz_log (LOG_LOG, "Optimizing search for medium set");
+
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
+ Z_PresentRequest *pr = new_apdu->u.presentRequest;
+ pr->referenceId = sr->referenceId;
+ pr->resultSetId = sr->resultSetName;
+ pr->preferredRecordSyntax = sr->preferredRecordSyntax;
+ *pr->numberOfRecordsRequested = toget;
+ pr->recordComposition = comp;
+ m_client->m_sr_transform = 1;
+ return new_apdu;
}
- m_client->m_sr_transform = 1;
- return new_apdu;
}
else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
- m_client->m_last_resultCount == 0)
+ m_client->m_last_resultCount <= 0)
{
// large set. Return pseudo-search response immediately
yaz_log (LOG_LOG, "Optimizing search for large set");
}
else
{
+ Z_NamePlusRecordList *npr;
+ int toget = m_client->m_last_resultCount;
+ Z_RecordComposition *comp = 0;
// small set
// send a present request (small set)
- yaz_log (LOG_LOG, "Optimizing search for small set");
- Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
- Z_PresentRequest *pr = new_apdu->u.presentRequest;
- pr->referenceId = sr->referenceId;
- pr->resultSetId = sr->resultSetName;
- pr->preferredRecordSyntax = sr->preferredRecordSyntax;
- *pr->numberOfRecordsRequested = m_client->m_last_resultCount;
+
if (sr->smallSetElementSetNames)
{
- pr->recordComposition = (Z_RecordComposition *)
+ comp = (Z_RecordComposition *)
odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
- pr->recordComposition->which = Z_RecordComp_simple;
- pr->recordComposition->u.simple = sr->smallSetElementSetNames;
+ comp->which = Z_RecordComp_simple;
+ comp->u.simple = sr->smallSetElementSetNames;
+ }
+
+ if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
+ sr->preferredRecordSyntax, comp))
+ {
+ yaz_log (LOG_LOG, "Returned cache records for small set");
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+ new_apdu->u.searchResponse->referenceId = sr->referenceId;
+ new_apdu->u.searchResponse->resultCount =
+ &m_client->m_last_resultCount;
+
+ new_apdu->u.searchResponse->numberOfRecordsReturned
+ = odr_intdup(odr_encode(), toget);
+
+ new_apdu->u.searchResponse->presentStatus =
+ odr_intdup(odr_encode(), Z_PresentStatus_success);
+ new_apdu->u.searchResponse->records = (Z_Records*)
+ odr_malloc(odr_encode(), sizeof(Z_Records));
+ new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
+ new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
+ new_apdu->u.searchResponse->nextResultSetPosition =
+ odr_intdup(odr_encode(), toget+1);
+ send_Z_PDU(new_apdu);
+ return 0;
+ }
+ else
+ {
+ yaz_log (LOG_LOG, "Optimizing search for small set");
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
+ Z_PresentRequest *pr = new_apdu->u.presentRequest;
+ pr->referenceId = sr->referenceId;
+ pr->resultSetId = sr->resultSetName;
+ pr->preferredRecordSyntax = sr->preferredRecordSyntax;
+ *pr->numberOfRecordsRequested = toget;
+ pr->recordComposition = comp;
+ m_client->m_sr_transform = 1;
+ return new_apdu;
}
- m_client->m_sr_transform = 1;
- return new_apdu;
}
}
else
delete m_client->m_last_query;
m_client->m_last_query = this_query;
m_client->m_last_ok = 0;
+ m_client->m_cache.clear();
+ m_client->m_resultSetStartPoint = 0;
+
+ xfree (m_client->m_last_resultSetId);
+ m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
+
m_client->m_last_databases.set(sr->num_databaseNames,
(const char **) sr->databaseNames);
}
return "presentRequest";
case Z_APDU_presentResponse:
return "presentResponse";
+ case Z_APDU_deleteResultSetRequest:
+ return "deleteResultSetRequest";
+ case Z_APDU_deleteResultSetResponse:
+ return "deleteResultSetResponse";
+ case Z_APDU_scanRequest:
+ return "scanRequest";
+ case Z_APDU_scanResponse:
+ return "scanResponse";
+ case Z_APDU_sortRequest:
+ return "sortRequest";
+ case Z_APDU_sortResponse:
+ return "sortResponse";
+ case Z_APDU_extendedServicesRequest:
+ return "extendedServicesRequest";
+ case Z_APDU_extendedServicesResponse:
+ return "extendedServicesResponse";
+ case Z_APDU_close:
+ return "close";
}
return "other";
}
{
if (m_client->m_init_flag)
{
- Z_APDU *apdu = create_Z_PDU(Z_APDU_initResponse);
- if (m_client->m_cookie)
+ Z_APDU *apdu = m_client->m_initResponse;
+ apdu->u.initResponse->otherInfo = 0;
+ if (m_client->m_cookie && *m_client->m_cookie)
set_otherInformationString(apdu, VAL_COOKIE, 1,
m_client->m_cookie);
send_Z_PDU(apdu);
if (oi)
*oi = 0;
+ if (apdu->which == Z_APDU_presentRequest &&
+ m_client->m_resultSetStartPoint == 0)
+ {
+ Z_PresentRequest *pr = apdu->u.presentRequest;
+ m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
+ m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
+ } else {
+ m_client->m_resultSetStartPoint = 0;
+ }
if (m_client->send_Z_PDU(apdu) < 0)
{
delete m_client;
void Yaz_Proxy::shutdown()
{
- // only keep if keep_alive flag and cookie is set...
- if (m_keepalive && m_client && m_client->m_cookie[0])
+ // only keep if keep_alive flag is set...
+ if (m_keepalive && m_client && m_client->m_waiting == 0)
{
- if (m_client->m_waiting == 2)
- abort();
+ yaz_log (LOG_LOG, "shutdown (client to proxy) keepalive %s",
+ m_client->get_hostname());
+ assert (m_client->m_waiting != 2);
// Tell client (if any) that no server connection is there..
m_client->m_server = 0;
- yaz_log (LOG_LOG, "shutdown (client to proxy) keepalive %s", m_client->get_hostname());
}
else if (m_client)
{
- if (m_client->m_waiting == 2)
- abort();
- yaz_log (LOG_LOG, "shutdown (client to proxy) close %s", m_client->get_hostname());
+ yaz_log (LOG_LOG, "shutdown (client to proxy) close %s",
+ m_client->get_hostname());
+ assert (m_client->m_waiting != 2);
delete m_client;
}
else if (!m_parent)
{
yaz_log (LOG_LOG, "shutdown (client to proxy) bad state");
- abort();
+ assert (m_parent);
}
else
{
if (m_next)
m_next->m_prev = m_prev;
m_waiting = 2; // for debugging purposes only.
+ odr_destroy(m_init_odr);
delete m_last_query;
+ xfree (m_last_resultSetId);
}
void Yaz_Proxy::timeoutNotify()
m_prev = 0;
m_init_flag = 0;
m_last_query = 0;
+ m_last_resultSetId = 0;
m_last_resultCount = 0;
m_last_ok = 0;
m_sr_transform = 0;
m_waiting = 0;
+ m_init_odr = odr_createmem (ODR_DECODE);
+ m_initResponse = 0;
+ m_resultSetStartPoint = 0;
}
const char *Yaz_Proxy::option(const char *name, const char *value)
m_waiting = 0;
yaz_log (LOG_LOG, "Receiving %s from %s", apdu_name(apdu),
get_hostname());
+ if (apdu->which == Z_APDU_initResponse)
+ {
+ NMEM nmem = odr_extract_mem (odr_decode());
+ odr_reset (m_init_odr);
+ nmem_transfer (m_init_odr->mem, nmem);
+ m_initResponse = apdu;
+ nmem_destroy (nmem);
+ }
if (apdu->which == Z_APDU_searchResponse)
{
- m_last_resultCount = *apdu->u.searchResponse->resultCount;
- int status = *apdu->u.searchResponse->searchStatus;
- if (status &&
- (!apdu->u.searchResponse->records ||
- apdu->u.searchResponse->records->which == Z_Records_DBOSD))
+ Z_SearchResponse *sr = apdu->u.searchResponse;
+ m_last_resultCount = *sr->resultCount;
+ int status = *sr->searchStatus;
+ if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
+ {
m_last_ok = 1;
+
+ if (sr->records && sr->records->which == Z_Records_DBOSD)
+ {
+ m_cache.add(odr_decode(),
+ sr->records->u.databaseOrSurDiagnostics, 1,
+ *sr->resultCount);
+ }
+ }
}
- if (apdu->which == Z_APDU_presentResponse && m_sr_transform)
+ if (apdu->which == Z_APDU_presentResponse)
{
- m_sr_transform = 0;
Z_PresentResponse *pr = apdu->u.presentResponse;
- Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
- Z_SearchResponse *sr = new_apdu->u.searchResponse;
- sr->referenceId = pr->referenceId;
- *sr->resultCount = m_last_resultCount;
- sr->records = pr->records;
- sr->nextResultSetPosition = pr->nextResultSetPosition;
- sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
- apdu = new_apdu;
+ if (m_sr_transform)
+ {
+ m_sr_transform = 0;
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+ Z_SearchResponse *sr = new_apdu->u.searchResponse;
+ sr->referenceId = pr->referenceId;
+ *sr->resultCount = m_last_resultCount;
+ sr->records = pr->records;
+ sr->nextResultSetPosition = pr->nextResultSetPosition;
+ sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
+ apdu = new_apdu;
+ }
+ if (pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
+ {
+ m_cache.add(odr_decode(),
+ pr->records->u.databaseOrSurDiagnostics,
+ m_resultSetStartPoint, -1);
+ m_resultSetStartPoint = 0;
+ }
}
if (m_cookie && *m_cookie)
set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
yaz_log (LOG_LOG, "Sending %s to client", apdu_name(apdu));
m_server->send_Z_PDU(apdu);
}
+ if (apdu->which == Z_APDU_close)
+ {
+ shutdown();
+ }
}
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