From 7d2cc6887deb7af7ef9b70fcb3532b988ec6f914 Mon Sep 17 00:00:00 2001
From: Vinnie Falco <vinnie.falco@gmail.com>
Date: Wed, 10 Jul 2013 13:06:28 -0700
Subject: [PATCH] Add null backend factory

---
 Builds/VisualStudio2012/RippleD.vcxproj       |  7 ++
 .../VisualStudio2012/RippleD.vcxproj.filters  |  6 ++
 .../node/ripple_NullBackendFactory.cpp        | 71 +++++++++++++++++++
 .../node/ripple_NullBackendFactory.h          | 29 ++++++++
 modules/ripple_app/ripple_app.cpp             |  4 +-
 5 files changed, 116 insertions(+), 1 deletion(-)
 create mode 100644 modules/ripple_app/node/ripple_NullBackendFactory.cpp
 create mode 100644 modules/ripple_app/node/ripple_NullBackendFactory.h

diff --git a/Builds/VisualStudio2012/RippleD.vcxproj b/Builds/VisualStudio2012/RippleD.vcxproj
index ff1e40ed11..1887c76056 100644
--- a/Builds/VisualStudio2012/RippleD.vcxproj
+++ b/Builds/VisualStudio2012/RippleD.vcxproj
@@ -43,6 +43,12 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\modules\ripple_app\node\ripple_NullBackendFactory.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\modules\ripple_app\node\ripple_SqliteBackendFactory.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
@@ -1345,6 +1351,7 @@
     <ClInclude Include="..\..\modules\ripple_app\node\ripple_NodeObject.h" />
     <ClInclude Include="..\..\modules\ripple_app\node\ripple_NodeStore.h" />
     <ClInclude Include="..\..\modules\ripple_app\node\ripple_LevelDBBackendFactory.h" />
+    <ClInclude Include="..\..\modules\ripple_app\node\ripple_NullBackendFactory.h" />
     <ClInclude Include="..\..\modules\ripple_app\node\ripple_SqliteBackendFactory.h" />
     <ClInclude Include="..\..\modules\ripple_app\ripple_app.h" />
     <ClInclude Include="..\..\modules\ripple_basics\containers\ripple_KeyCache.h" />
diff --git a/Builds/VisualStudio2012/RippleD.vcxproj.filters b/Builds/VisualStudio2012/RippleD.vcxproj.filters
index 72f166073d..3cb46b0943 100644
--- a/Builds/VisualStudio2012/RippleD.vcxproj.filters
+++ b/Builds/VisualStudio2012/RippleD.vcxproj.filters
@@ -861,6 +861,9 @@
     <ClCompile Include="..\..\modules\ripple_app\node\ripple_LevelDBBackendFactory.cpp">
       <Filter>[1] Ripple\ripple_app\node</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\modules\ripple_app\node\ripple_NullBackendFactory.cpp">
+      <Filter>[1] Ripple\ripple_app\node</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\Subtrees\sqlite\sqlite3.h">
@@ -1608,6 +1611,9 @@
     <ClInclude Include="..\..\modules\ripple_app\node\ripple_LevelDBBackendFactory.h">
       <Filter>[1] Ripple\ripple_app\node</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\modules\ripple_app\node\ripple_NullBackendFactory.h">
+      <Filter>[1] Ripple\ripple_app\node</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="..\..\src\cpp\ripple\ripple.proto" />
diff --git a/modules/ripple_app/node/ripple_NullBackendFactory.cpp b/modules/ripple_app/node/ripple_NullBackendFactory.cpp
new file mode 100644
index 0000000000..6ffb0d8299
--- /dev/null
+++ b/modules/ripple_app/node/ripple_NullBackendFactory.cpp
@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+/*
+    Copyright (c) 2011-2013, OpenCoin, Inc.
+*/
+//==============================================================================
+
+class NullBackendFactory::Backend : public NodeStore::Backend
+{
+public:
+    Backend ()
+    {
+    }
+
+    ~Backend ()
+    {
+    }
+
+    std::string getDataBaseName()
+    {
+        return std::string ();
+    }
+
+    bool store (NodeObject::ref obj)
+    {
+        return false;
+    }
+
+    bool bulkStore (const std::vector< NodeObject::pointer >& objs)
+    {
+        return false;
+    }
+
+    NodeObject::pointer retrieve (uint256 const& hash)
+    {
+        return NodeObject::pointer ();
+    }
+
+    void visitAll (FUNCTION_TYPE <void (NodeObject::pointer)> func)
+    {
+    }
+};
+
+//------------------------------------------------------------------------------
+
+NullBackendFactory::NullBackendFactory ()
+{
+}
+
+NullBackendFactory::~NullBackendFactory ()
+{
+}
+
+NullBackendFactory& NullBackendFactory::getInstance ()
+{
+    static NullBackendFactory instance;
+
+    return instance;
+}
+
+String NullBackendFactory::getName () const
+{
+    return "none";
+}
+
+NodeStore::Backend* NullBackendFactory::createInstance (StringPairArray const& keyValues)
+{
+    return new NullBackendFactory::Backend;
+}
+
+//------------------------------------------------------------------------------
+
diff --git a/modules/ripple_app/node/ripple_NullBackendFactory.h b/modules/ripple_app/node/ripple_NullBackendFactory.h
new file mode 100644
index 0000000000..7112473384
--- /dev/null
+++ b/modules/ripple_app/node/ripple_NullBackendFactory.h
@@ -0,0 +1,29 @@
+//------------------------------------------------------------------------------
+/*
+    Copyright (c) 2011-2013, OpenCoin, Inc.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_NULLBACKENDFACTORY_H_INCLUDED
+#define RIPPLE_NULLBACKENDFACTORY_H_INCLUDED
+
+/** Factory to produce a null backend.
+
+    This is for standalone / testing mode.
+*/
+class NullBackendFactory : public NodeStore::BackendFactory
+{
+private:
+    class Backend;
+
+    NullBackendFactory ();
+    ~NullBackendFactory ();
+
+public:
+    static NullBackendFactory& 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 3df7dd400c..130e11334d 100644
--- a/modules/ripple_app/ripple_app.cpp
+++ b/modules/ripple_app/ripple_app.cpp
@@ -96,8 +96,9 @@ namespace ripple
 
 #include "node/ripple_NodeObject.h"
 #include "node/ripple_NodeStore.h"
-#include "node/ripple_SqliteBackendFactory.h"
 #include "node/ripple_LevelDBBackendFactory.h"
+#include "node/ripple_NullBackendFactory.h"
+#include "node/ripple_SqliteBackendFactory.h"
 
 #include "src/cpp/ripple/ripple_SHAMapItem.h"
 #include "src/cpp/ripple/ripple_SHAMapNode.h"
@@ -237,6 +238,7 @@ static const uint64 tenTo17m1 = tenTo17 - 1;
 #include "node/ripple_NodeObject.cpp"
 #include "node/ripple_NodeStore.cpp"
 #include "node/ripple_LevelDBBackendFactory.cpp"
+#include "node/ripple_NullBackendFactory.cpp"
 #include "node/ripple_SqliteBackendFactory.cpp"
 
 #include "src/cpp/ripple/Ledger.cpp"