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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include <qpid/Exception.h>
#include <qpid/log/Statement.h>
#include <qpid/store/StorageProvider.h>
#include "MessageMapRecordset.h"
#include "VariantHelper.h"
namespace qpid {
namespace store {
namespace ms_sql {
void
MessageMapRecordset::add(uint64_t messageId, uint64_t queueId)
{
rs->AddNew();
rs->Fields->GetItem("messageId")->Value = messageId;
rs->Fields->GetItem("queueId")->Value = queueId;
rs->Update();
}
bool
MessageMapRecordset::remove(uint64_t messageId, uint64_t queueId)
{
// Look up all mappings for the specified message. Then scan
// for the specified queue and keep track of whether or not the
// message exists on any queue we are not looking for a well.
std::ostringstream filter;
filter << "messageId = " << messageId << std::ends;
rs->PutFilter (VariantHelper<std::string>(filter.str()));
if (rs->RecordCount == 0)
return false;
MessageMap m;
IADORecordBinding *piAdoRecordBinding;
rs->QueryInterface(__uuidof(IADORecordBinding),
(LPVOID *)&piAdoRecordBinding);
piAdoRecordBinding->BindToRecordset(&m);
bool moreEntries = false, deleted = false;
rs->MoveFirst();
// If the desired mapping gets deleted, and we already know there are
// other mappings for the message, don't bother finishing the scan.
while (!rs->EndOfFile && !(deleted && moreEntries)) {
if (m.queueId == queueId) {
rs->Delete(adAffectCurrent);
rs->Update();
deleted = true;
}
else {
moreEntries = true;
}
rs->MoveNext();
}
piAdoRecordBinding->Release();
rs->Filter = "";
return moreEntries;
}
void
MessageMapRecordset::removeForQueue(uint64_t queueId,
std::vector<uint64_t>& orphaned)
{
// Read all the messages queued on queueId and add them to the orphaned
// list. Then remove each one and learn if there are references to it
// from other queues. The ones without references are left in the
// orphaned list, others are removed.
std::ostringstream filter;
filter << "queueId = " << queueId << std::ends;
rs->PutFilter (VariantHelper<std::string>(filter.str()));
MessageMap m;
IADORecordBinding *piAdoRecordBinding;
rs->QueryInterface(__uuidof(IADORecordBinding),
(LPVOID *)&piAdoRecordBinding);
piAdoRecordBinding->BindToRecordset(&m);
while (!rs->EndOfFile) {
orphaned.push_back(m.messageId);
rs->MoveNext();
}
piAdoRecordBinding->Release();
rs->Filter = ""; // Remove filter on queueId
rs->Requery(adOptionUnspecified); // Get the entire map again
// Now delete all the messages on this queue; any message that still has
// references from other queue(s) is removed from orphaned.
for (std::vector<uint64_t>::iterator i = orphaned.begin();
i != orphaned.end();
) {
if (remove(*i, queueId))
i = orphaned.erase(i); // There are other refs to message *i
else
++i;
}
}
void
MessageMapRecordset::recover(MessageQueueMap& msgMap)
{
if (rs->BOF && rs->EndOfFile)
return; // Nothing to do
rs->MoveFirst();
MessageMap b;
IADORecordBinding *piAdoRecordBinding;
rs->QueryInterface(__uuidof(IADORecordBinding),
(LPVOID *)&piAdoRecordBinding);
piAdoRecordBinding->BindToRecordset(&b);
while (!rs->EndOfFile) {
msgMap[b.messageId].push_back(b.queueId);
rs->MoveNext();
}
piAdoRecordBinding->Release();
}
void
MessageMapRecordset::dump()
{
Recordset::dump();
if (rs->EndOfFile && rs->BOF) // No records
return;
rs->MoveFirst();
MessageMap m;
IADORecordBinding *piAdoRecordBinding;
rs->QueryInterface(__uuidof(IADORecordBinding),
(LPVOID *)&piAdoRecordBinding);
piAdoRecordBinding->BindToRecordset(&m);
while (!rs->EndOfFile) {
QPID_LOG(notice, "msg " << m.messageId << " on queue " << m.queueId);
rs->MoveNext();
}
piAdoRecordBinding->Release();
}
}}} // namespace qpid::store::ms_sql
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