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Diffstat (limited to 'qpid/cpp/src/qpid/store/ms-sql/MessageRecordset.h')
-rw-r--r-- | qpid/cpp/src/qpid/store/ms-sql/MessageRecordset.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/store/ms-sql/MessageRecordset.h b/qpid/cpp/src/qpid/store/ms-sql/MessageRecordset.h new file mode 100644 index 0000000000..698b2561fe --- /dev/null +++ b/qpid/cpp/src/qpid/store/ms-sql/MessageRecordset.h @@ -0,0 +1,85 @@ +#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 */ |