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#ifndef QPID_STORE_MSSQL_MESSAGERECORDSET_H
#define QPID_STORE_MSSQL_MESSAGERECORDSET_H
/*
*
* 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 <icrsint.h>
#include "BlobRecordset.h"
#include <qpid/broker/PersistableMessage.h>
#include <qpid/broker/RecoveryManager.h>
#include <boost/intrusive_ptr.hpp>
namespace qpid {
namespace store {
namespace ms_sql {
/**
* @class MessageRecordset
*
* Class for storing and recovering messages. Messages are primarily blobs
* and handled similarly. However, messages larger than the staging threshold
* are not contained completely in memory; they're left mostly in the store
* and the header is held in memory. So when the message "blob" is saved,
* an additional size-of-the-header field is prepended to the blob.
* On recovery, the size-of-the-header is used to get only what's needed
* until it's determined if the entire message is to be recovered to memory.
*/
class MessageRecordset : public BlobRecordset {
class Binding : public CADORecordBinding {
BEGIN_ADO_BINDING(Binding)
ADO_FIXED_LENGTH_ENTRY2(1, adBigInt, messageId, FALSE)
END_ADO_BINDING()
public:
uint64_t messageId;
};
public:
// Store a message. Store the header size (4 bytes) then the regular
// blob comprising the message.
void add(const boost::intrusive_ptr<qpid::broker::PersistableMessage>& msg);
// Append additional content to an existing message.
void append(const boost::intrusive_ptr<const qpid::broker::PersistableMessage>& msg,
const std::string& data);
// Remove an existing message
void remove(const boost::intrusive_ptr<const qpid::broker::PersistableMessage>& msg);
// Load all or part of a stored message. This skips the header parts and
// loads content.
void loadContent(const boost::intrusive_ptr<const qpid::broker::PersistableMessage>& msg,
std::string& data,
uint64_t offset,
uint32_t length);
// Recover messages and save a map of those recovered.
void recover(qpid::broker::RecoveryManager& recoverer,
std::map<uint64_t, broker::RecoverableMessage::shared_ptr>& messageMap);
// Dump table contents; useful for debugging.
void dump();
};
}}} // namespace qpid::store::ms_sql
#endif /* QPID_STORE_MSSQL_MESSAGERECORDSET_H */
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