--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/servlib/storage/PersistentStore.h Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2004-2006 Intel Corporation
+ *
+ * Licensed 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.
+ */
+
+#ifndef _PERSISTENT_STORE_H_
+#define _PERSISTENT_STORE_H_
+
+
+#include <vector>
+#include <oasys/serialize/Serialize.h>
+
+namespace dtn {
+
+/**
+ * The abstract base class implementing a persistent storage system.
+ * Specific implementations (i.e. Berkeley DB or SQL) should derive
+ * from this class.
+ *
+ * TODO:
+ * * should the key be an int or a std::string?
+ */
+class PersistentStore {
+public:
+ /**
+ * Close and flush the store.
+ */
+ virtual int close() = 0;
+
+ /**
+ * Fill in the fields of the object referred to by *obj with the
+ * value stored at the given key.
+ */
+ virtual int get(oasys::SerializableObject* obj, const int key) = 0;
+
+ /**
+ * Store the object with the given key.
+ */
+ virtual int add(oasys::SerializableObject* obj, const int key) = 0;
+
+ /**
+ * Update the object with the given key.
+ */
+ virtual int update(oasys::SerializableObject* obj, const int key) = 0;
+
+ /**
+ * Delete the object at the given key.
+ */
+ virtual int del(const int key) = 0;
+
+ /**
+ * Return the number of elements in the table.
+ */
+ virtual int num_elements() = 0;
+
+ /**
+ * Fill in the given vector with the keys currently stored in the
+ * table.
+ */
+ virtual void keys(std::vector<int> * v) = 0;
+
+ virtual ~PersistentStore();
+
+};
+} // namespace dtn
+
+#endif /* _PERSISTENT_STORE_H_ */