ehcache demo

// 配置默认缓存属性
        CacheConfiguration<String, String> cacheConfiguration = CacheConfigurationBuilder.newCacheConfigurationBuilder(
                // 缓存数据K和V的数值类型
                // 在ehcache3.3中必须指定缓存键值类型,如果使用中类型与配置的不同,会报类转换异常
                String.class, String.class,
                ResourcePoolsBuilder
                        .newResourcePoolsBuilder()
                        //设置缓存堆容纳元素个数(JVM内存空间)超出个数后会存到offheap中
                        .heap(1000L,EntryUnit.ENTRIES)
                        //设置堆外储存大小(内存存储) 超出offheap的大小会淘汰规则被淘汰
                        .offheap(100L, MemoryUnit.MB)
                        // 配置磁盘持久化储存(硬盘存储)用来持久化到磁盘,这里设置为false不启用
                        .disk(500L, MemoryUnit.MB, false)
        ).withExpiry(Expirations.timeToLiveExpiration(
                //设置缓存过期时间
                Duration.of(30L, TimeUnit.SECONDS))
        ).withExpiry(Expirations.timeToIdleExpiration(
                //设置被访问后过期时间(同时设置和TTL和TTI之后会被覆盖,这里TTI生效,之前版本xml配置后是两个配置了都会生效)
                Duration.of(60L, TimeUnit.SECONDS))
        )
        // 缓存淘汰策略 默认策略是LRU（最近最少使用）。你可以设置为FIFO（先进先出）或是LFU（较少使用）。
        // 这块还没看
        /*.withEvictionAdvisor(
                new OddKeysEvictionAdvisor<Long, String>())*/
        ).build();
        // CacheManager管理缓存
        cacheManager = CacheManagerBuilder.newCacheManagerBuilder()
        // 硬盘持久化地址
        .with(CacheManagerBuilder.persistence("D:/ehcacheData"))
        // 设置一个默认缓存配置
        .withCache("defaultCache", cacheConfiguration)
        //创建之后立即初始化
        .build(true);

 CacheManager cacheManager = CacheManagerBuilder.newCacheManagerBuilder()
                .withCache("preConfigured",
                        CacheConfigurationBuilder.newCacheConfigurationBuilder(Long.class, String.class,
                                ResourcePoolsBuilder.heap(100))
                                .build())
                .build(true);

        Cache<Long, String> preConfigured
                = cacheManager.getCache("preConfigured", Long.class, String.class);

        Cache<Long, String> myCache = cacheManager.createCache("myCache",
                CacheConfigurationBuilder.newCacheConfigurationBuilder(Long.class, String.class,
                        ResourcePoolsBuilder.heap(100)).build());

        myCache.put(1L, "da one!");
        String value = myCache.get(1L);

        System.out.println("value="+value);

        cacheManager.close();