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Source File | Conditionals | Statements | Methods | TOTAL | |||||||||||||
Configuration\Cache\Memory\MemoryCacheLevel.cs | 50.0 % | 90.0 % | 100.0 % | 87.5 % |
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1 | ||
2 | #region Apache Notice | |
3 | /***************************************************************************** | |
4 | * $Header: $ | |
5 | * $Revision: $ | |
6 | * $Date: $ | |
7 | * | |
8 | * iBATIS.NET Data Mapper | |
9 | * Copyright (C) 2004 - Gilles Bayon | |
10 | * | |
11 | * | |
12 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
13 | * you may not use this file except in compliance with the License. | |
14 | * You may obtain a copy of the License at | |
15 | * | |
16 | * http://www.apache.org/licenses/LICENSE-2.0 | |
17 | * | |
18 | * Unless required by applicable law or agreed to in writing, software | |
19 | * distributed under the License is distributed on an "AS IS" BASIS, | |
20 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
21 | * See the License for the specific language governing permissions and | |
22 | * limitations under the License. | |
23 | * | |
24 | ********************************************************************************/ | |
25 | #endregion | |
26 | ||
27 | #region Imports | |
28 | using System; | |
29 | using System.Collections; | |
30 | ||
31 | using IBatisNet.DataMapper.Configuration.Cache; | |
32 | using IBatisNet.DataMapper.Exceptions; | |
33 | #endregion | |
34 | ||
35 | namespace IBatisNet.DataMapper.Configuration.Cache.Memory | |
36 | { | |
37 | /// <summary> | |
38 | /// Summary description for MemoryCacheLevel. | |
39 | /// </summary> | |
40 | public class MemoryCacheLevel | |
41 | { | |
42 | #region Fields | |
43 | private static Hashtable _cacheLevelMap = new Hashtable(); | |
44 | ||
45 | /// <summary> | |
46 | /// Constant for weak caching | |
47 | /// This cache model is probably the best choice in most cases. It will increase | |
48 | /// performance for popular results, but it will absolutely release the memory to | |
49 | /// be used in allocating other objects, assuming that the results are not currently | |
50 | /// in use. | |
51 | /// References an object while still allowing it to be garbage collected. | |
52 | /// </summary> | |
53 | public static MemoryCacheLevel Weak; | |
54 | ||
55 | /// <summary> | |
56 | /// Constant for strong caching. | |
57 | /// This cache model will guarantee that the results stay in memory until the cache | |
58 | /// is explicitly flushed. This is ideal for results that are: | |
59 | /// <list> | |
60 | /// <item>very small</item> | |
61 | /// <item>absolutely static</item> | |
62 | /// <item>used very often</item> | |
63 | /// </list> | |
64 | /// The advantage is that performance will be very good for this particular query. | |
65 | /// The disadvantage is that if the memory used by these results is needed, then it | |
66 | /// will not be released to make room for other objects (possibly more important | |
67 | /// objects). | |
68 | /// </summary> | |
69 | public static MemoryCacheLevel Strong; | |
70 | ||
71 | private string _referenceType; | |
72 | #endregion | |
73 | ||
74 | #region Constructor (s) / Destructor | |
75 | /// <summary> | |
76 | /// | |
77 | /// </summary> | |
78 | 1 | static MemoryCacheLevel() |
79 | { | |
80 | 1 | Weak = new MemoryCacheLevel("WEAK"); |
81 | 1 | Strong = new MemoryCacheLevel("STRONG"); |
82 | ||
83 | 1 | _cacheLevelMap[Weak.ReferenceType] = Weak; |
84 | 1 | _cacheLevelMap[Strong.ReferenceType] = Strong; |
85 | } | |
86 | #endregion | |
87 | ||
88 | #region Methods | |
89 | /// <summary> | |
90 | /// Creates a new instance of CacheLevel | |
91 | /// </summary> | |
92 | /// <param name="type">The type of the CacheLevel.</param> | |
93 | 2 | private MemoryCacheLevel(string type) |
94 | { | |
95 | 2 | _referenceType = type; |
96 | } | |
97 | ||
98 | /// <summary> | |
99 | /// | |
100 | /// </summary> | |
101 | public string ReferenceType | |
102 | { | |
103 | 2 | get |
104 | { | |
105 | 2 | return _referenceType; |
106 | } | |
107 | } | |
108 | ||
109 | /// <summary> | |
110 | /// | |
111 | /// </summary> | |
112 | /// <param name="referenceType"></param> | |
113 | /// <returns></returns> | |
114 | 170 | public static MemoryCacheLevel GetByRefenceType(string referenceType) |
115 | { | |
116 | 170 | MemoryCacheLevel cacheLevel = (MemoryCacheLevel)_cacheLevelMap[referenceType]; |
117 | 170 | if (cacheLevel == null) |
118 | { | |
119 | 0 | throw new DataMapperException("Error getting CacheLevel (reference type) for name: '" +referenceType+ "'."); |
120 | } | |
121 | 170 | return cacheLevel; |
122 | } | |
123 | #endregion | |
124 | ||
125 | } | |
126 | } | |
127 |
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