缓存

src/main/java/com/viontech/storage/entity/Generator.java

 package com.viontech.storage.entity;
 
+import cn.hutool.cache.CacheUtil;
+import cn.hutool.cache.impl.TimedCache;
 import cn.hutool.core.collection.CollectionUtil;
 import cn.hutool.core.lang.Pair;
 import cn.hutool.core.util.XmlUtil;
@@ -21,6 +23,7 @@ import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 
+import java.time.Duration;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -35,7 +38,7 @@ import java.util.stream.Collectors;
 public class Generator {
     private static final String ROOT_ELEMENT_NAME = "StorageConfig";
     private static final String FILE_VERSION = "001-012-000-000";
-
+    private static final TimedCache<Long, Generator> CACHE = CacheUtil.newTimedCache(Duration.ofSeconds(5).toMillis());
     private final Document document = XmlUtil.createXml(ROOT_ELEMENT_NAME);
     /** 来自 StorageConfig, 对应 Solution */
     private final List<Context> contexts;
@@ -43,8 +46,11 @@ public class Generator {
     private final Map<Long, PicConfigVo> picConfigMap;
     /** key: captionSetId */
     private final Map<Long, List<CaptionVo>> captionSetMap;
+    private String config;
 
     public Generator(Long storageConfigId) {
+        Generator generator = CACHE.get(storageConfigId);
+        if (generator == null) {
             StorageConfigService storageConfigService = SpringUtil.getBean(StorageConfigService.class);
             PicConfigService picConfigService = SpringUtil.getBean(PicConfigService.class);
             CaptionService captionService = SpringUtil.getBean(CaptionService.class);
@@ -69,9 +75,17 @@ public class Generator {
             List<Caption> captions = captionService.list(captionService.query().in("caption_set_id", captionSetIds).getWrapper());
 
             this.captionSetMap = captions.stream().map(CaptionVo::copy).collect(Collectors.groupingBy(CaptionVo::getCaptionSetId, Collectors.toList()));
+            CACHE.put(storageConfigId, this);
+        } else {
+            this.contexts = generator.contexts;
+            this.picConfigMap = generator.picConfigMap;
+            this.captionSetMap = generator.captionSetMap;
+            this.config = generator.config;
+        }
     }
 
     public String build() {
+        if (this.config == null) {
             // 基本上算是固定写法
             Node rootNode = document.getFirstChild();
             rootNode.appendChild(createTextNode("FileVersion", FILE_VERSION));
@@ -92,7 +106,9 @@ public class Generator {
                     standard.appendChild(solution);
                 }
             }
-        return XmlUtil.toStr(document, "GBK", false);
+            this.config = XmlUtil.toStr(document, "GBK", false);
+        }
+        return this.config;
     }