Fix putIfAbsent bug in InMemoryCacheStore

src/main/java/cc/ryanc/halo/cache/AbstractCacheStore.java

@@ -111,7 +111,6 @@ public abstract class AbstractCacheStore<K, V> implements CacheStore<K, V> {
             expireAt = DateUtils.addMilliseconds(now, Long.valueOf(millis).intValue());
         }
 
-
         // Build cache wrapper
         CacheWrapper<V> cacheWrapper = new CacheWrapper<>();
         cacheWrapper.setCreateAt(now);

src/main/java/cc/ryanc/halo/cache/CacheWrapper.java

@@ -2,6 +2,7 @@ package cc.ryanc.halo.cache;
 
 import lombok.*;
 
+import java.io.Serializable;
 import java.util.Date;
 
 /**
@@ -10,11 +11,11 @@ import java.util.Date;
  * @author johnniang
  */
 @Data
-@EqualsAndHashCode
 @ToString
+@EqualsAndHashCode
 @NoArgsConstructor
 @AllArgsConstructor
-public class CacheWrapper<V> {
+class CacheWrapper<V> implements Serializable {
 
     /**
      * Cache data

src/main/java/cc/ryanc/halo/cache/InMemoryCacheStore.java

@@ -42,10 +42,24 @@ public class InMemoryCacheStore extends StringCacheStore {
         Assert.hasText(key, "Cache key must not be blank");
         Assert.notNull(cacheWrapper, "Cache wrapper must not be null");
 
+        log.debug("Preparing to put key: [{}], value: [{}]", key, cacheWrapper);
+
         // Put the cache wrapper
         CacheWrapper<String> putCacheWrapper = cacheContainer.putIfAbsent(key, cacheWrapper);
 
-        return cacheWrapper.equals(putCacheWrapper);
+        if (putCacheWrapper == null) {
+            putCacheWrapper = cacheWrapper;
+        }
+
+        boolean isEqual = cacheWrapper.equals(putCacheWrapper);
+
+        if (isEqual) {
+            log.debug("Put successfully");
+        } else {
+            log.warn("Failed to put the cache, because the key: [{}] has been present already", key);
+        }
+
+        return isEqual;
     }
 
     @Override

src/main/java/cc/ryanc/halo/config/HaloConfiguration.java

@@ -38,7 +38,7 @@ public class HaloConfiguration {
      * @return Cors filter registration bean
      */
     @Bean
-    FilterRegistrationBean<CorsFilter> corsFilter() {
+    public FilterRegistrationBean<CorsFilter> corsFilter() {
         FilterRegistrationBean<CorsFilter> corsFilter = new FilterRegistrationBean<>();
 
         corsFilter.setOrder(Ordered.HIGHEST_PRECEDENCE + 10);
@@ -54,7 +54,7 @@ public class HaloConfiguration {
      * @return Log filter registration bean
      */
     @Bean
-    FilterRegistrationBean<LogFilter> logFilter() {
+    public FilterRegistrationBean<LogFilter> logFilter() {
         FilterRegistrationBean<LogFilter> logFilter = new FilterRegistrationBean<>();
 
         logFilter.setOrder(Ordered.HIGHEST_PRECEDENCE + 9);