[Add] AutoCleanTimer, Cleanable 增加缓存库自动清理;

[Update] HotDataCacheStore 增加对自动清理的支持;
[Change] RedisPoolCacheStore 将Redis缓存库抽象类设为default(原public);
[Change] MiraiMessageSender, BotCommandProcess 适配HotDataCacheStore的修改;
[Change] BotCommandProcess 调整ranking命令的输出格式;

src/main/java/net/lamgc/cgj/bot/BotCommandProcess.java

@@ -50,7 +50,7 @@ public class BotCommandProcess {
     private final static CacheStore<JsonElement> illustInfoCache = new JsonRedisCacheStore(BotEventHandler.redisServer, "illustInfo", gson);
     private final static CacheStore<JsonElement> illustPreLoadDataCache = new HotDataCacheStore<>(
             new JsonRedisCacheStore(BotEventHandler.redisServer, "illustPreLoadData", gson),
-            new LocalHashCacheStore<>(), 3600000, 900000);
+            new LocalHashCacheStore<>(), 3600000, 900000, true);
     private final static CacheStore<JsonElement> searchBodyCache = new JsonRedisCacheStore(BotEventHandler.redisServer, "searchBody", gson);
     private final static CacheStore<List<JsonObject>> rankingCache = new JsonObjectRedisListCacheStore(BotEventHandler.redisServer, "ranking", gson);
     private final static CacheStore<List<String>> pagesCache = new StringListRedisCacheStore(BotEventHandler.redisServer, "imagePages");
@@ -408,7 +408,7 @@ public class BotCommandProcess {
                 StringBuilder builder = new StringBuilder("[");
                 illustObj.get("tags").getAsJsonArray().forEach(el -> builder.append(el.getAsString()).append(", "));
                 builder.replace(builder.length() - 2, builder.length(), "]");
-                log.debug("{} ({} / {})\n\t作品id: {}, \n\t作者名(作者id): {} ({}), \n\t作品标题: {}, \n\t作品Tags: {}, \n\t页数: {}, \n\t作品链接: {}",
+                log.debug("{} ({} / {})\n\t作品id: {}, \n\t作者名(作者id): {} ({}), \n\t作品标题: {}, \n\t作品Tags: {}, \n\t页数: {}页, \n\t作品链接: {}",
                         searchArea.name(),
                         count,
                         illustsList.size(),
@@ -435,7 +435,7 @@ public class BotCommandProcess {
                 result.append(searchArea.name()).append(" (").append(count).append(" / ").append(limit).append(")\n\t作品id: ").append(illustId)
                         .append(", \n\t作者名: ").append(illustObj.get("userName").getAsString())
                         .append("\n\t作品标题: ").append(illustObj.get("illustTitle").getAsString())
-                        .append("\n\t作品页数: ").append(illustObj.get("pageCount").getAsInt())
+                        .append("\n\t作品页数: ").append(illustObj.get("pageCount").getAsInt()).append("页")
                         .append("\n").append(imageMsg).append("\n");
                 count++;
             }

src/main/java/net/lamgc/cgj/bot/cache/AutoCleanTimer.java

@@ -0,0 +1,52 @@
+package net.lamgc.cgj.bot.cache;
+
+import com.google.common.base.Throwables;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Set;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.CopyOnWriteArraySet;
+
+public class AutoCleanTimer extends TimerTask {
+
+    private final static Set<Cleanable> cleanSet = new CopyOnWriteArraySet<>();
+
+    private final static Timer cleanTimer = new Timer("Thread-AutoClean", true);
+
+    private final static Logger log = LoggerFactory.getLogger(AutoCleanTimer.class.getName());
+
+    static {
+        cleanTimer.schedule(new AutoCleanTimer(), 100L);
+    }
+
+    /**
+     * 增加需要定时执行清理的缓存库
+     * @param store 已实现Cleanable的对象
+     */
+    public static void add(Cleanable store) {
+        cleanSet.add(store);
+    }
+
+    /**
+     * 移除已添加的缓存库
+     * @param store 需要从AutoCleanTimer移除的对象
+     */
+    public static void remove(Cleanable store) {
+        cleanSet.remove(store);
+    }
+
+    private AutoCleanTimer() {}
+
+    @Override
+    public void run() {
+        cleanSet.forEach(cleanable -> {
+            try {
+                cleanable.clean();
+            } catch (Exception e) {
+                log.error("{} 执行清理动作时发生异常:\n{}", cleanable.toString(), Throwables.getStackTraceAsString(e));
+            }
+        });
+    }
+}

src/main/java/net/lamgc/cgj/bot/cache/Cleanable.java

@@ -0,0 +1,10 @@
+package net.lamgc.cgj.bot.cache;
+
+/**
+ * 可清理接口, 实现该接口代表该类拥有清理动作.
+ */
+public interface Cleanable {
+
+    void clean() throws Exception;
+
+}

src/main/java/net/lamgc/cgj/bot/cache/HotDataCacheStore.java

@@ -10,7 +10,7 @@ import java.util.*;
  * @param <T> 存储类型
  * @author LamGC
  */
-public class HotDataCacheStore<T> implements CacheStore<T> {
+public class HotDataCacheStore<T> implements CacheStore<T>, Cleanable {
 
     private final CacheStore<T> parent;
     private final CacheStore<T> current;
@@ -24,17 +24,22 @@ public class HotDataCacheStore<T> implements CacheStore<T> {
      * @param parent 上级缓存存储库
      * @param current 热点缓存存储库, 最好使用本地缓存(例如 {@linkplain LocalHashCacheStore LocalHashCacheStore})
      * @param expireTime 本地缓存库的缓存项过期时间, 单位毫秒;
-     *                   该时间并不是所有缓存项的最终过期时间, 还需要根据expireFloatRange的设定随机设置, 公式:
-     *                   {@code expireTime + new Random().nextInt(expireFloatRange)}
+ *                   该时间并不是所有缓存项的最终过期时间, 还需要根据expireFloatRange的设定随机设置, 公式:
+ *                   {@code expireTime + new Random().nextInt(expireFloatRange)}
      * @param expireFloatRange 过期时间的浮动范围(单位毫秒), 用于防止短时间内大量缓存项失效导致的缓存雪崩
+     * @param autoClean 是否交由{@link AutoCleanTimer}自动执行清理
      */
-    public HotDataCacheStore(CacheStore<T> parent, CacheStore<T> current, long expireTime, int expireFloatRange) {
+    public HotDataCacheStore(CacheStore<T> parent, CacheStore<T> current, long expireTime, int expireFloatRange, boolean autoClean) {
         this.parent = parent;
         this.current = current;
         this.expireTime = expireTime;
         this.expireFloatRange = expireFloatRange;
-        log.debug("HotDataCacheStore初始化完成. (Parent: {}, Current: {}, expireTime: {}, expireFloatRange: {})",
-                parent, current, expireTime, expireFloatRange);
+        if(autoClean) {
+            AutoCleanTimer.add(this);
+        }
+
+        log.debug("HotDataCacheStore初始化完成. (Parent: {}, Current: {}, expireTime: {}, expireFloatRange: {}, autoClean: {})",
+                parent, current, expireTime, expireFloatRange, autoClean);
     }
 
     @Override
@@ -121,4 +126,13 @@ public class HotDataCacheStore<T> implements CacheStore<T> {
     public boolean supportedList() {
         return false;
     }
+
+    @Override
+    public void clean() {
+        for(String key : this.current.keys()) {
+            if(current.exists(key)) {
+                current.remove(key);
+            }
+        }
+    }
 }

src/main/java/net/lamgc/cgj/bot/cache/RedisPoolCacheStore.java

@@ -13,7 +13,7 @@ import java.util.Set;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
-public abstract class RedisPoolCacheStore<T> implements CacheStore<T> {
+abstract class RedisPoolCacheStore<T> implements CacheStore<T> {
 
     private final JedisPool jedisPool;
     private final String keyPrefix;

src/main/java/net/lamgc/cgj/bot/framework/mirai/message/MiraiMessageSender.java

@@ -33,7 +33,7 @@ public class MiraiMessageSender implements MessageSender {
     private final static CacheStore<String> imageIdCache = new HotDataCacheStore<>(
             new StringRedisCacheStore(BotEventHandler.redisServer, "mirai.imageId"),
             new LocalHashCacheStore<>(),
-            5400000, 1800000);
+            5400000, 1800000, true);
 
     /**
      * 使用id构造发送器