From 2e507c98deb4f10492b9e5ecf9e98ee54bf51509 Mon Sep 17 00:00:00 2001
From: Vinnie Falco <vinnie.falco@gmail.com>
Date: Tue, 30 Jul 2013 11:55:18 -0700
Subject: [PATCH] Add memory backend

---
 .../node/ripple_MemoryBackendFactory.cpp      | 101 ++++++++++++++++++
 .../node/ripple_MemoryBackendFactory.h        |  30 ++++++
 modules/ripple_app/ripple_app.cpp             |   2 +
 3 files changed, 133 insertions(+)
 create mode 100644 modules/ripple_app/node/ripple_MemoryBackendFactory.cpp
 create mode 100644 modules/ripple_app/node/ripple_MemoryBackendFactory.h

diff --git a/modules/ripple_app/node/ripple_MemoryBackendFactory.cpp b/modules/ripple_app/node/ripple_MemoryBackendFactory.cpp
new file mode 100644
index 0000000000..d0536b3505
--- /dev/null
+++ b/modules/ripple_app/node/ripple_MemoryBackendFactory.cpp
@@ -0,0 +1,101 @@
+//------------------------------------------------------------------------------
+/*
+    Copyright (c) 2011-2013, OpenCoin, Inc.
+*/
+//==============================================================================
+
+class MemoryBackendFactory::Backend : public NodeStore::Backend
+{
+private:
+    typedef std::map <uint256 const, NodeObject::pointer> Map;
+
+public:
+    Backend (size_t keyBytes, StringPairArray const& keyValues)
+        : m_keyBytes (keyBytes)
+    {
+    }
+
+    ~Backend ()
+    {
+    }
+
+    std::string getDataBaseName ()
+    {
+        return "memory";
+    }
+
+    //--------------------------------------------------------------------------
+
+    NodeObject::pointer retrieve (uint256 const &hash)
+    {
+        Map::iterator iter = m_map.find (hash);
+
+        if (iter != m_map.end ())
+            return iter->second;
+
+        return NodeObject::pointer ();
+    }
+
+    bool store (NodeObject::ref object)
+    {
+        Map::iterator iter = m_map.find (object->getHash ());
+
+        if (iter == m_map.end ())
+        {
+            m_map.insert (std::make_pair (object->getHash (), object));
+        }
+
+        return true;
+    }
+
+    bool bulkStore (const std::vector< NodeObject::pointer >& batch)
+    {
+        for (int i = 0; i < batch.size (); ++i)
+            store (batch [i]);
+
+        return true;
+    }
+
+    void visitAll (FUNCTION_TYPE <void (NodeObject::pointer)> f)
+    {
+        for (Map::const_iterator iter = m_map.begin (); iter != m_map.end (); ++iter)
+            f (iter->second);
+    }
+
+    //--------------------------------------------------------------------------
+
+private:
+    size_t const m_keyBytes;
+
+    Map m_map;
+};
+
+//------------------------------------------------------------------------------
+
+MemoryBackendFactory::MemoryBackendFactory ()
+{
+}
+
+MemoryBackendFactory::~MemoryBackendFactory ()
+{
+}
+
+MemoryBackendFactory& MemoryBackendFactory::getInstance ()
+{
+    static MemoryBackendFactory instance;
+
+    return instance;
+}
+
+String MemoryBackendFactory::getName () const
+{
+    return "Memory";
+}
+
+NodeStore::Backend* MemoryBackendFactory::createInstance (StringPairArray const& keyValues)
+{
+    return new MemoryBackendFactory::Backend (32, keyValues);
+}
+
+//------------------------------------------------------------------------------
+
diff --git a/modules/ripple_app/node/ripple_MemoryBackendFactory.h b/modules/ripple_app/node/ripple_MemoryBackendFactory.h
new file mode 100644
index 0000000000..5bb4cf2700
--- /dev/null
+++ b/modules/ripple_app/node/ripple_MemoryBackendFactory.h
@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+/*
+    Copyright (c) 2011-2013, OpenCoin, Inc.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_MEMORYBACKENDFACTORY_H_INCLUDED
+#define RIPPLE_MEMORYBACKENDFACTORY_H_INCLUDED
+
+/** Factory to produce a RAM based backend for the NodeStore.
+
+    @see NodeStore
+*/
+class MemoryBackendFactory : public NodeStore::BackendFactory
+{
+private:
+    class Backend;
+
+    MemoryBackendFactory ();
+    ~MemoryBackendFactory ();
+
+public:
+    static MemoryBackendFactory& getInstance ();
+
+    String getName () const;
+
+    NodeStore::Backend* createInstance (StringPairArray const& keyValues);
+};
+
+#endif
diff --git a/modules/ripple_app/ripple_app.cpp b/modules/ripple_app/ripple_app.cpp
index 4660d7caa7..b263b583dc 100644
--- a/modules/ripple_app/ripple_app.cpp
+++ b/modules/ripple_app/ripple_app.cpp
@@ -103,6 +103,7 @@ namespace ripple
 #include "node/ripple_NodeObject.h"
 #include "node/ripple_NodeStore.h"
 #include "node/ripple_LevelDBBackendFactory.h"
+#include "node/ripple_MemoryBackendFactory.h"
 #include "node/ripple_HyperLevelDBBackendFactory.h"
 #include "node/ripple_MdbBackendFactory.h"
 #include "node/ripple_NullBackendFactory.h"
@@ -246,6 +247,7 @@ static const uint64 tenTo17m1 = tenTo17 - 1;
 #include "node/ripple_NodeObject.cpp"
 #include "node/ripple_NodeStore.cpp"
 #include "node/ripple_LevelDBBackendFactory.cpp"
+#include "node/ripple_MemoryBackendFactory.cpp"
 #include "node/ripple_HyperLevelDBBackendFactory.cpp"
 #include "node/ripple_MdbBackendFactory.cpp"
 #include "node/ripple_NullBackendFactory.cpp"