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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 */