Initial checkin of portable message store plugin and MS SQL-specific storage provider. Goes with QPID-2017

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@827870 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 62 insertions, 0 deletions

diff --git a/cpp/src/qpid/store/ms-sql/BlobAdapter.h b/cpp/src/qpid/store/ms-sql/BlobAdapter.h
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+++ b/cpp/src/qpid/store/ms-sql/BlobAdapter.h
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+#ifndef QPID_STORE_MSSQL_BLOBADAPTER_H
+#define QPID_STORE_MSSQL_BLOBADAPTER_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 <comutil.h>
+#include <qpid/framing/Buffer.h>
+#include <qpid/framing/FieldTable.h>
+
+namespace qpid {
+namespace store {
+namespace ms_sql {
+
+/**
+ * @class BlobAdapter
+ *
+ * Adapter for accessing a blob (varbinary SQL field) as a qpid::framing::Buffer
+ * in an exception-safe way.
+ */
+class BlobAdapter : public _variant_t {
+private:
+    // This Buffer's pointer indicates whether or not a safearray has
+    // been locked; if it's 0, no locking was done.
+    qpid::framing::Buffer buff;
+    qpid::framing::FieldTable fields;
+
+    void extractBuff();
+
+public:
+    // Initialize with the known length of the data that will come.
+    // Assigning a _variant_t to this object will set up the array to be
+    // accessed with the operator Buffer&()
+    BlobAdapter(long blobSize) : _variant_t(), buff(0, blobSize) {}
+    ~BlobAdapter();
+    BlobAdapter& operator=(_variant_t& var_t_Src)
+      { _variant_t::operator=(var_t_Src); return *this; }
+    operator qpid::framing::Buffer& ();
+    operator qpid::framing::FieldTable& ();
+};
+
+}}}  // namespace qpid::store::ms_sql
+
+#endif /* QPID_STORE_MSSQL_BLOBADAPTER_H */