1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright (C) 2007-2008 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_NIDS_H
#define BU_CACHE_STORE_NIDS_H
#include "bu/fstring.h"
#include "bu/stream.h"
#include "bu/nids.h"
#include "bu/nidsstream.h"
#include "bu/cachestore.h"
#include "bu/file.h"
#include "bu/archive.h"
namespace Bu
{
template<class keytype, class obtype>
keytype __cacheGetKey( const obtype *pObj );
template<class keytype, class obtype>
obtype *__cacheStoreNidsAlloc( const keytype &key )
{
return new obtype();
}
template<class keytype, class obtype>
void __cacheStoreNidsStore( Bu::Stream &s, obtype &rObj,
const keytype & )
{
Bu::Archive ar( s, Bu::Archive::save );
ar << rObj;
}
template<class keytype, class obtype>
obtype *__cacheStoreNidsLoad( Bu::Stream &s, const keytype &key )
{
obtype *pObj = __cacheStoreNidsAlloc<keytype, obtype>( key );
Bu::Archive ar( s, Bu::Archive::load );
ar >> (*pObj);
return pObj;
}
template<class keytype, class obtype>
class CacheStoreNids : public CacheStore<keytype, obtype>
{
public:
CacheStoreNids( Bu::Stream &sArch,
int iBlockSize=1024, int iPreAllocate=1 ) :
nStore( sArch )
{
try
{
nStore.initialize();
NidsStream ns = nStore.openStream( 0 );
Bu::Archive ar( ns, Bu::Archive::load );
ar >> hId;
}
catch( Bu::NidsException &e )
{
nStore.initialize( iBlockSize, iPreAllocate );
int iStream = nStore.createStream();
if( iStream != 0 )
throw Bu::ExceptionBase("That's...horrible...id = %d.\n\n", iStream );
NidsStream ns = nStore.openStream( 0 );
Bu::Archive ar( ns, Bu::Archive::save );
ar << hId;
}
}
virtual ~CacheStoreNids()
{
NidsStream ns = nStore.openStream( 0 );
Bu::Archive ar( ns, Bu::Archive::save );
ar << hId;
}
virtual obtype *load( const keytype &key )
{
int iStream = hId.get( key );
NidsStream ns = nStore.openStream( iStream );
obtype *pOb = __cacheStoreNidsLoad<keytype, obtype>( ns, key );
return pOb;
}
virtual void unload( obtype *pObj, const keytype &key )
{
int iStream = hId.get( key );
NidsStream ns = nStore.openStream( iStream );
__cacheStoreNidsStore<keytype, obtype>( ns, *pObj, key );
delete pObj;
}
virtual keytype create( obtype *pSrc )
{
keytype key = __cacheGetKey<keytype, obtype>( pSrc );
int iStream = nStore.createStream();
hId.insert( key, iStream );
NidsStream ns = nStore.openStream( iStream );
__cacheStoreNidsStore<keytype, obtype>( ns, *pSrc, key );
return key;
}
virtual void sync()
{
NidsStream ns = nStore.openStream( 0 );
Bu::Archive ar( ns, Bu::Archive::save );
ar << hId;
nStore.sync();
}
virtual void sync( obtype *pSrc, const keytype &key )
{
int iStream = hId.get( key );
NidsStream ns = nStore.openStream( iStream );
__cacheStoreNidsStore<keytype, obtype>( ns, *pSrc, key );
}
virtual void destroy( obtype *pObj, const keytype &key )
{
int iStream = hId.get( key );
nStore.deleteStream( iStream );
hId.erase( key );
delete pObj;
}
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:
Nids nStore;
typedef Bu::Hash<keytype, long> NidHash;
NidHash hId;
};
};
#endif
|
