diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessChain.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessChain.java
index 5cc728c12..04ac1aefd 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessChain.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessChain.java
@@ -1,19 +1,15 @@
 package com.ai.cloud.skywalking.analysis.filter;
 
-import com.ai.cloud.skywalking.analysis.config.Config;
-import com.ai.cloud.skywalking.analysis.config.ConfigInitializer;
-import com.ai.cloud.skywalking.analysis.model.ChainNode;
-import com.ai.cloud.skywalking.analysis.model.CostMap;
-import com.ai.cloud.skywalking.analysis.model.SpanEntry;
-import com.ai.cloud.skywalking.protocol.Span;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.ai.cloud.skywalking.analysis.config.Config;
+
 public class SpanNodeProcessChain {
     private static Logger logger = LoggerFactory.getLogger(SpanNodeProcessChain.class.getName());
     private static Map<String, SpanNodeProcessFilter> filterMap;
@@ -40,7 +36,7 @@ public class SpanNodeProcessChain {
             SpanNodeProcessFilter currentFilter = null;
             for (int i = filters.length - 1; i >= 0; i--) {
                 try {
-                    Class filterClass = Class.forName(Config.Filter.FILTER_PACKAGE_NAME + "." + filters[i]);
+                    Class<?> filterClass = Class.forName(Config.Filter.FILTER_PACKAGE_NAME + "." + filters[i]);
                     SpanNodeProcessFilter tmpSpanNodeFilter = (SpanNodeProcessFilter) filterClass.newInstance();
                     tmpSpanNodeFilter.setNextProcessChain(currentFilter);
                     currentFilter = tmpSpanNodeFilter;
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessFilter.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessFilter.java
index 74d5f5d6c..f00ccf477 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessFilter.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/SpanNodeProcessFilter.java
@@ -3,7 +3,6 @@ package com.ai.cloud.skywalking.analysis.filter;
 import com.ai.cloud.skywalking.analysis.model.ChainNode;
 import com.ai.cloud.skywalking.analysis.model.CostMap;
 import com.ai.cloud.skywalking.analysis.model.SpanEntry;
-import com.ai.cloud.skywalking.protocol.Span;
 
 public abstract class SpanNodeProcessFilter {
 
@@ -11,11 +10,13 @@ public abstract class SpanNodeProcessFilter {
 
     public abstract void doFilter(SpanEntry spanEntry, ChainNode node, CostMap costMap);
 
-    public SpanNodeProcessFilter getNextProcessChain() {
-        return nextProcessChain;
+    protected void doNext(SpanEntry spanEntry, ChainNode node, CostMap costMap){
+    	if(nextProcessChain != null){
+    		nextProcessChain.doFilter(spanEntry, node, costMap);
+    	}
     }
 
-    public void setNextProcessChain(SpanNodeProcessFilter nextProcessChain) {
+    void setNextProcessChain(SpanNodeProcessFilter nextProcessChain) {
         this.nextProcessChain = nextProcessChain;
     }
 }
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/AppendBusinessKeyFilter.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/AppendBusinessKeyFilter.java
index c02779bd4..ebe6244d0 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/AppendBusinessKeyFilter.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/AppendBusinessKeyFilter.java
@@ -11,8 +11,6 @@ public class AppendBusinessKeyFilter extends SpanNodeProcessFilter {
     public void doFilter(SpanEntry spanEntry, ChainNode node, CostMap costMap) {
         node.setViewPoint(node.getViewPoint() + spanEntry.getBusinessKey());
 
-        if (getNextProcessChain() != null) {
-            getNextProcessChain().doFilter(spanEntry, node, costMap);
-        }
+        this.doNext(spanEntry, node, costMap);
     }
 }
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/CopyAttrFilter.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/CopyAttrFilter.java
index 4cf708cd4..1f52e9bfd 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/CopyAttrFilter.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/CopyAttrFilter.java
@@ -17,8 +17,6 @@ public class CopyAttrFilter extends SpanNodeProcessFilter {
         node.setUserId(spanEntry.getUserId());
         node.setBusinessKey(spanEntry.getBusinessKey());
 
-        if (getNextProcessChain() != null) {
-            getNextProcessChain().doFilter(spanEntry, node, costMap);
-        }
+        this.doNext(spanEntry, node, costMap);
     }
 }
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ProcessCostTimeFilter.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ProcessCostTimeFilter.java
index d0677e12c..b6c93a5b4 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ProcessCostTimeFilter.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ProcessCostTimeFilter.java
@@ -17,8 +17,6 @@ public class ProcessCostTimeFilter extends SpanNodeProcessFilter {
 
         costMap.put(spanEntry.getParentLevelId(), subNodeCost);
 
-        if (getNextProcessChain() != null) {
-            getNextProcessChain().doFilter(spanEntry, node, costMap);
-        }
+        this.doNext(spanEntry, node, costMap);
     }
 }
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ReplaceAddressFilter.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ReplaceAddressFilter.java
index ad69d2759..527e7a1c2 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ReplaceAddressFilter.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/ReplaceAddressFilter.java
@@ -16,8 +16,6 @@ public class ReplaceAddressFilter extends SpanNodeProcessFilter {
         String viewPoint = spanEntry.getViewPoint().replaceAll(IP_PORT_REGEX, spanEntry.getApplicationId());
         node.setViewPoint(viewPoint);
 
-        if (getNextProcessChain() != null) {
-            getNextProcessChain().doFilter(spanEntry, node, costMap);
-        }
+        this.doNext(spanEntry, node, costMap);
     }
 }
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/TokenGenerateFilter.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/TokenGenerateFilter.java
index 29ca49ba0..a7aa1edfb 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/TokenGenerateFilter.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/filter/impl/TokenGenerateFilter.java
@@ -16,8 +16,6 @@ public class TokenGenerateFilter extends SpanNodeProcessFilter {
 
         node.setNodeToken(nodeToken);
 
-        if (getNextProcessChain() != null) {
-            getNextProcessChain().doFilter(spanEntry, node, costMap);
-        }
+        this.doNext(spanEntry, node, costMap);
     }
 }