1 files changed, 158 insertions, 0 deletions

diff --git a/src/experimental/cachestoremyriad.h b/src/experimental/cachestoremyriad.h
new file mode 100644
index 0000000..e632a82
--- /dev/null
+++ b/src/experimental/cachestoremyriad.h
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2007-2011 Xagasoft, All rights reserved.
+ *
+ * This file is part of the libbu++ library and is released under the
+ * terms of the license contained in the file LICENSE.
+ */
+
+#ifndef BU_CACHE_STORE_MYRIAD_H
+#define BU_CACHE_STORE_MYRIAD_H
+
+#include "bu/string.h"
+#include "bu/stream.h"
+#include "bu/myriad.h"
+#include "bu/cachestore.h"
+#include "bu/myriadstream.h"
+
+#include "bu/archive.h"
+
+namespace Bu
+{
+        template<class keytype, class obtype>
+        keytype __cacheGetKey( const obtype *pObj );
+
+        template<class keytype, class obtype>
+        obtype *__cacheStoreMyriadAlloc( const keytype &key )
+        {
+                return new obtype();
+        }
+
+        template<class keytype, class obtype>
+        void __cacheStoreMyriadStore( Bu::Stream &s, obtype &rObj,
+                        const keytype & )
+        {
+                Bu::Archive ar( s, Bu::Archive::save );
+                ar << rObj;
+        }
+
+        template<class keytype, class obtype>
+        obtype *__cacheStoreMyriadLoad( Bu::Stream &s, const keytype &key )
+        {
+                obtype *pObj = __cacheStoreMyriadAlloc<keytype, obtype>( key );
+                Bu::Archive ar( s, Bu::Archive::load );
+                ar >> (*pObj);
+                return pObj;
+        }
+
+        template<class keytype, class obtype>
+        class CacheStoreMyriad : public CacheStore<keytype, obtype>
+        {
+        public:
+                CacheStoreMyriad( Bu::Stream &sArch,
+                        int iBlockSize=512, int iPreAllocate=8 ) :
+                        mStore( sArch, iBlockSize, iPreAllocate )
+                {
+                        try
+                        {
+                                MyriadStream ns = mStore.openStream( 1 );
+                                Bu::Archive ar( ns, Bu::Archive::load );
+                                ar >> hId;
+                        }
+                        catch( Bu::MyriadException &e )
+                        {
+                                int iStream = mStore.createStream();
+                                if( iStream != 1 )
+                                        throw Bu::ExceptionBase("That's...horrible...id = %d.\n\n",
+                                                        iStream );
+                                MyriadStream ns = mStore.openStream( 1 );
+                                Bu::Archive ar( ns, Bu::Archive::save );
+                                ar << hId;
+                        }
+                }
+
+                virtual ~CacheStoreMyriad()
+                {
+                        MyriadStream ns = mStore.openStream( 1 );
+                        Bu::Archive ar( ns, Bu::Archive::save );
+                        ar << hId;
+                }
+                
+                virtual obtype *load( const keytype &key )
+                {
+                        int iStream = hId.get( key );
+                        MyriadStream ns = mStore.openStream( iStream );
+                        obtype *pOb = __cacheStoreMyriadLoad<keytype, obtype>( ns, key );
+                        return pOb;
+                }
+
+                virtual void unload( obtype *pObj, const keytype & )
+                {
+                        delete pObj;
+                }
+
+                virtual keytype create( obtype *pSrc )
+                {
+                        keytype key = __cacheGetKey<keytype, obtype>( pSrc );
+                        int iStream = mStore.createStream();
+                        hId.insert( key, iStream );
+                        MyriadStream ns = mStore.openStream( iStream );
+                        __cacheStoreMyriadStore<keytype, obtype>( ns, *pSrc, key );
+                        ns.setSize( ns.tell() );
+                        return key;
+                }
+
+                virtual void sync()
+                {
+                        MyriadStream ns = mStore.openStream( 1 );
+                        Bu::Archive ar( ns, Bu::Archive::save );
+                        ar << hId;
+                        ns.setSize( ns.tell() );
+                        mStore.sync();
+                }
+
+                virtual void sync( obtype *pSrc, const keytype &key )
+                {
+                        int iStream = hId.get( key );
+                        MyriadStream ns = mStore.openStream( iStream );
+                        __cacheStoreMyriadStore<keytype, obtype>( ns, *pSrc, key );
+                        ns.setSize( ns.tell() );
+                }
+
+                virtual void destroy( obtype *pObj, const keytype &key )
+                {
+                        int iStream = hId.get( key );
+                        mStore.deleteStream( iStream );
+                        hId.erase( key );
+                        delete pObj;
+                }
+
+                virtual void destroy( const keytype &key )
+                {
+                        int iStream = hId.get( key );
+                        mStore.deleteStream( iStream );
+                        hId.erase( key );
+                }
+
+                virtual bool has( const keytype &key )
+                {
+                        return hId.has( key );
+                }
+
+                virtual Bu::List<keytype> getKeys()
+                {
+                        return hId.getKeys();
+                }
+
+                virtual int getSize()
+                {
+                        return hId.getSize();
+                }
+
+        private:
+                Myriad mStore;
+                typedef Bu::Hash<keytype, long> StreamHash;
+                StreamHash hId;
+        };
+};
+
+#endif