mybatis缓存解析
mybatis的缓存 首先来看下mybatis对缓存的规范，规范嘛就是定义的接口啦。 缓存接口 Cache接口 定义了缓存的方法 public interface Cache { /**获取缓存的id * @return The identifier of this cache */ String getId(); /**添加缓存 * @param key Can be any object but usually it is a {@link CacheKey} * @param value The result of a select. */ void putObject(Object key, Object value); /**根据缓存键获取缓存 * @param key The key * @return The object stored in the cache. */ Object getObject(Object key); /**移除缓存 * As of 3.3.0 this method is only called during a rollback * for any previous value that was missing in the cache. * This lets any blocking cache to release the lock that * may have previously put on the key. * A blocking cache puts a lock when a value is null * and releases it when the value is back again. * This way other threads will wait for the value to be * available instead of hitting the database. * * * @param key The key * @return Not used */ Object removeObject(Object key); /** * Clears this cache instance */ void clear(); /** * Optional. This method is not called by the core. * * @return The number of elements stored in the cache (not its capacity). */ int getSize(); /** * Optional. As of 3.2.6 this method is no longer called by the core. * * Any locking needed by the cache must be provided internally by the cache provider. * * @return A ReadWriteLock */ ReadWriteLock getReadWriteLock(); } 实现 ...