spring CacheManager 对细粒度参数配置的支持, 每个cache执行不同的策略

guavaCache CaffeineCache 默认支持每个cahce 细粒度的参数配置， 不同的cache 不同的配置

spring 的 GuavaCacheManager 和 CaffeineCachaManager 是不支持每个cache不同的细粒度参数配置的, 需要重写CacheManager

增加 cacheSpec 和 defaultSpec. cacheSpec是每个cache的配置， defaultSpec是默认的cache配置

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private Map<String, CacheBuilderSpec> cacheSpec = Maps.newHashMap();

private CacheBuilderSpec defaultSpec = CacheBuilderSpec.parse("expireAfterWrite=1d");

 public void setCacheSpec(Map<String, String> cacheSpecString) {
     if (MapUtils.isNotEmpty(cacheSpecString)) {
         HashMap<String, CacheBuilderSpec> cacheSpecification = Maps.newHashMap();
         for (Map.Entry<String, String> en : cacheSpecString.entrySet()) {
             cacheSpecification.put(en.getKey(), CacheBuilderSpec.parse(en.getValue()));
         }
         this.cacheSpec = cacheSpecification;
     }
 }

重写 createNativeGuavaCache, 以guavaCache 为例, 如果该cache存在配置, 取该cache的配置, 如果没有就取默认配置

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/**
 * Create a native Guava Cache instance for the specified cache name.
 *
 * @param name the name of the cache
 * @return the native Guava Cache instance
 */
protected com.google.common.cache.Cache<Object, Object> createNativeGuavaCache(final String name) {
    CacheBuilderSpec spec = cacheSpec.get(name);
    final com.google.common.cache.Cache<Object, Object> cache = CacheBuilder.from(spec == null ? defaultSpec : spec).recordStats().build();
    return cache;
}

然后使用以下配置就可以了, 包名这里涉及到公司信息, 省略不计

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<cache:annotation-driven cache-manager="cacheManager"/>

<bean id="cacheManager" class="com.*.*.*.*.cache.GuavaCacheManager">
    <property name="cacheSpec">
        <map>
            <entry key="KEY1" value="expireAfterWrite=10m"/>
            <entry key="KEY2" value="expireAfterWrite=10m"/>
            <entry key="KEY3" value="expireAfterWrite=10m"/>
        </map>
    </property>
</bean>

也可以使用java bean的配置, 这里不赘述