[add] 缓存问题优化

signal-optimize-service/src/main/java/net/wanji/opt/servicev2/implv2/TrendServiceV2Impl.java

@@ -48,6 +48,7 @@ import org.springframework.util.StringUtils;
 import javax.annotation.Resource;
 import java.time.LocalDateTime;
 import java.util.*;
+import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.stream.Collectors;
 
 /**
@@ -87,8 +88,8 @@ public class TrendServiceV2Impl implements TrendServiceV2 {
     @Resource
     private GreenChartSchemeHistMapper greenChartSchemeHistMapper;
 
-    private static List<OptMonitoringVO> greenListCache = new ArrayList<>(10);
-    private static List<OptMonitoringVO> crossListCache = new ArrayList<>(80);
+    private static List<OptMonitoringVO> greenListCache = new CopyOnWriteArrayList<>();
+    private static List<OptMonitoringVO> crossListCache = new CopyOnWriteArrayList<>();
 
 
     @Override
@@ -243,8 +244,10 @@ public class TrendServiceV2Impl implements TrendServiceV2 {
                 }
             }
         });
-        greenListCache.clear();
-        greenListCache.addAll(optMonitoringVOS);
+        if (!CollectionUtils.isEmpty(greenListCache)) {
+            greenListCache.clear();
+            greenListCache.addAll(optMonitoringVOS);
+        }
         return optMonitoringVOS;
     }
 
@@ -287,8 +290,10 @@ public class TrendServiceV2Impl implements TrendServiceV2 {
                 }
             }
         });
-        crossListCache.clear();
-        crossListCache.addAll(optMonitoringVOS);
+        if (!CollectionUtils.isEmpty(crossListCache)) {
+            crossListCache.clear();
+            crossListCache.addAll(optMonitoringVOS);
+        }
         return optMonitoringVOS;
     }