1 /*
2 * Copyright 2009-2023 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.apache.ibatis.annotations;
17
18 import java.lang.annotation.Documented;
19 import java.lang.annotation.ElementType;
20 import java.lang.annotation.Retention;
21 import java.lang.annotation.RetentionPolicy;
22 import java.lang.annotation.Target;
23
24 import org.apache.ibatis.cache.Cache;
25 import org.apache.ibatis.cache.decorators.LruCache;
26 import org.apache.ibatis.cache.impl.PerpetualCache;
27
28 // @formatter:off
29 /**
30 * The annotation that specify to use cache on namespace(e.g. mapper interface).
31 * <p>
32 * <b>How to use:</b>
33 *
34 * <pre>
35 * @CacheNamespace(implementation = CustomCache.class, properties = {
36 * @Property(name = "host", value = "${mybatis.cache.host}"),
37 * @Property(name = "port", value = "${mybatis.cache.port}"),
38 * @Property(name = "name", value = "usersCache")
39 * })
40 * public interface UserMapper {
41 * // ...
42 * }
43 * </pre>
44 *
45 * @author Clinton Begin
46 * @author Kazuki Shimizu
47 */
48 // @formatter:on
49 @Documented
50 @Retention(RetentionPolicy.RUNTIME)
51 @Target(ElementType.TYPE)
52 public @interface CacheNamespace {
53
54 /**
55 * Returns the cache implementation type to use.
56 *
57 * @return the cache implementation type
58 */
59 Class<? extends Cache> implementation() default PerpetualCache.class;
60
61 /**
62 * Returns the cache evicting implementation type to use.
63 *
64 * @return the cache evicting implementation type
65 */
66 Class<? extends Cache> eviction() default LruCache.class;
67
68 /**
69 * Returns the flush interval.
70 *
71 * @return the flush interval
72 */
73 long flushInterval() default 0;
74
75 /**
76 * Return the cache size.
77 *
78 * @return the cache size
79 */
80 int size() default 1024;
81
82 /**
83 * Returns whether use read/write cache.
84 *
85 * @return {@code true} if use read/write cache; {@code false} if otherwise
86 */
87 boolean readWrite() default true;
88
89 /**
90 * Returns whether block the cache at request time or not.
91 *
92 * @return {@code true} if block the cache; {@code false} if otherwise
93 */
94 boolean blocking() default false;
95
96 /**
97 * Returns property values for a implementation object.
98 *
99 * @return property values
100 *
101 * @since 3.4.2
102 */
103 Property[] properties() default {};
104
105 }