From 10c92d881286ae78bb303b4f924a32565cce2a9c Mon Sep 17 00:00:00 2001
From: LamGC <lam827@lamgc.net>
Date: Sat, 12 Sep 2020 02:59:40 +0800
Subject: [PATCH] =?UTF-8?q?[Update]=20CacheStore-local=20=E9=80=82?=
 =?UTF-8?q?=E9=85=8D=E6=9B=B4=E6=94=B9;?=
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[Update] LocalCacheStoreFactory 适配 CacheStore-api 对 CacheStoreFactory 的更改;
---
 .../cgj/bot/cache/local/LocalCacheStoreFactory.java  | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/LocalCacheStoreFactory.java b/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/LocalCacheStoreFactory.java
index 028e5a7..da81605 100644
--- a/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/LocalCacheStoreFactory.java
+++ b/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/LocalCacheStoreFactory.java
@@ -26,6 +26,7 @@ import net.lamgc.cgj.bot.cache.convert.StringConverter;
  * 最简单的缓存实现, 无持久化功能.
  * @author LamGC
  */
+@Factory(name = "Local", priority = FactoryPriority.PRIORITY_LOWEST)
 public class LocalCacheStoreFactory implements CacheStoreFactory {
 
     @Override
@@ -48,4 +49,15 @@ public class LocalCacheStoreFactory implements CacheStoreFactory {
         return new HashMapCacheStore<>();
     }
 
+    /**
+     * 内存使用阀值.
+     * <p>当内存使用到了指定百分比时, 将禁止创建 CacheStore.
+     */
+    private final static double MEMORY_USAGE_THRESHOLD = 85;
+    @Override
+    public boolean canGetCacheStore() {
+        Runtime runtime = Runtime.getRuntime();
+        double memoryUsedPercentage = (double) runtime.totalMemory() / runtime.maxMemory();
+        return memoryUsedPercentage < MEMORY_USAGE_THRESHOLD;
+    }
 }