多語檔一次讀出來

src/main/java/org/ylhealth/ym/springtest/hibernate/I18NPostProcessor.java

@@ -25,7 +25,7 @@ import com.google.common.cache.CacheBuilder;
 
 /**
  * Spring data 取出後進行多國語系的替換
- *
+ * 快取多語資料 30 分鐘
  */
 public class I18NPostProcessor implements MethodInterceptor {
   private Logger logger = LoggerFactory.getLogger(getClass());
@@ -93,29 +93,34 @@ public class I18NPostProcessor implements MethodInterceptor {
     String language = LocaleContextHolder.getLocale().toString();
     String table = i18n.table();
     String idColumn = i18n.id();
+    
+    Map<String, Map<String, String>> translateTable = translateTable(table, language, i18n.mapping(), idColumn);
 
-    String key = table + "_" + id + "_" + language;
-    Map<String, String> result = cache.getIfPresent(key);
+    return translateTable.get(id);
+  }
+  
+  private Map<String, Map<String, String>> translateTable(String table, String language, I18NTranslate[] mapping, String idColumn) {
+    String key = "Table:" + table + "_" + language;
+    Map<String, Map<String, String>> result = cache.getIfPresent(key);
     if (result == null) {
       logger.trace("translate query, table: {}", table);
       String sql =
-          String.format("select * from %s where %s = ? and languageCode = ?", table, idColumn);
+          String.format("select * from %s where languageCode = ?", table);
       Query query = em.createNativeQuery(sql);
       SQLQuery query1 = query.unwrap(org.hibernate.SQLQuery.class);
       query1.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);
-      for (I18NTranslate i18nTranslate : i18n.mapping()) {
+      query1.addScalar(idColumn);
+      for (I18NTranslate i18nTranslate : mapping) {
         query1.addScalar(i18nTranslate.column());
       }
-      query.setParameter(1, id);
-      query.setParameter(2, language);
+      query.setParameter(1, language);
       List<Map<String, String>> result1 = query.getResultList();
-      if (!result1.isEmpty()) {
-        result = result1.get(0);
-        cache.put(key, result);
-      } else 
-        cache.put(key, new HashMap<>());
+      result = new HashMap<>();
+      for (Map<String, String> map : result1) {
+        result.put(map.get(idColumn), map);
+      }
+      cache.put(key, result);
     }
-
     return result;
   }
 

src/main/java/org/ylhealth/ym/springtest/hibernate/I18NRepositoryFactoryBean.java

@@ -9,6 +9,14 @@ import org.springframework.data.repository.core.RepositoryInformation;
 import org.springframework.data.repository.core.support.RepositoryFactorySupport;
 import org.springframework.data.repository.core.support.RepositoryProxyPostProcessor;
 
+/**
+ * 將 Spring JPA 的讀取套上 i18n 轉換
+ * @author scott.yang
+ *
+ * @param <R>
+ * @param <T>
+ * @param <I>
+ */
 public class I18NRepositoryFactoryBean<R extends JpaRepository<T, I>, T, I extends Serializable>
     extends JpaRepositoryFactoryBean<R, T, I> {
 

src/main/java/org/ylhealth/ym/springtest/hibernate/I18NTranslates.java

@@ -9,7 +9,7 @@ import java.lang.annotation.Target;
 @Target({ElementType.TYPE})
 public @interface I18NTranslates {
   /**
-   * 對應的 id
+   *  翻譯表格對應的資料 id 欄位
    *
    * @return
    */
@@ -23,7 +23,7 @@ public @interface I18NTranslates {
   String table() default "";
 
   /**
-   * 資料對應
+   * 要翻譯的資料對應
    */
   I18NTranslate[] mapping();
 }