diff --git a/cmd/rcall.go b/cmd/rcall.go
index ab3a87c7c3d0ea52f9a78ad931d85117afec9d1c..edc8e4db7fb007ae5ab4d10926e804407d43fd2f 100644
--- a/cmd/rcall.go
+++ b/cmd/rcall.go
@@ -43,17 +43,22 @@ var reverseCmd = &cobra.Command{
 		_ = json.Unmarshal(file, &parsedDeps)
 
 		fmt.Println("start rcall class :", className)
-		content := analyser.Analysis(className, *&parsedDeps)
+		content := analyser.Analysis(className, *&parsedDeps, WriteCallMap)
 
 		if remove != "" {
 			content = strings.ReplaceAll(content, remove, "")
 		}
 
 		cmd_util.WriteToCocaFile("rcall.dot", content)
-		cmd_util.ConvertToSvg("call")
+		cmd_util.ConvertToSvg("rcall")
 	},
 }
 
+func WriteCallMap(rcallMap map[string][]string) {
+	mapJson, _ := json.MarshalIndent(rcallMap, "", "\t")
+	cmd_util.WriteToCocaFile("rcallmap.json", string(mapJson))
+}
+
 func init() {
 	rootCmd.AddCommand(reverseCmd)
 
diff --git a/core/context/rcall/rcall_graph.go b/core/context/rcall/rcall_graph.go
index b839e6efde61266265d3b817be40ef818cf892d9..316d7842405acd5046e1a0a3a5379ab8658a08b0 100644
--- a/core/context/rcall/rcall_graph.go
+++ b/core/context/rcall/rcall_graph.go
@@ -1,8 +1,6 @@
 package rcall
 
 import (
-	"encoding/json"
-	"github.com/phodal/coca/cmd/cmd_util"
 	"github.com/phodal/coca/core/context/call"
 	"github.com/phodal/coca/core/domain"
 )
@@ -14,12 +12,11 @@ func NewRCallGraph() RCallGraph {
 	return *&RCallGraph{}
 }
 
-func (c RCallGraph) Analysis(funcName string, clzs []domain.JClassNode) string {
+func (c RCallGraph) Analysis(funcName string, clzs []domain.JClassNode, writeCallback func(rcallMap map[string][]string)) string {
 	var projectMethodMap = BuildProjectMethodMap(clzs)
 	rcallMap := BuildRCallMethodMap(clzs, projectMethodMap)
 
-	mapJson, _ := json.MarshalIndent(rcallMap, "", "\t")
-	cmd_util.WriteToCocaFile("rcallmap.json", string(mapJson))
+	writeCallback(rcallMap)
 
 	chain := c.buildRCallChain(funcName, rcallMap)
 
@@ -45,9 +42,9 @@ func BuildRCallMethodMap(parserDeps []domain.JClassNode, projectMaps map[string]
 	for _, clz := range parserDeps {
 		for _, method := range clz.Methods {
 			var caller = method.BuildFullMethodName(clz)
-			for _, call := range method.MethodCalls {
-				if call.Class != "" {
-					callee := call.BuildFullMethodName()
+			for _, jMethodCall := range method.MethodCalls {
+				if jMethodCall.Class != "" {
+					callee := jMethodCall.BuildFullMethodName()
 					if projectMaps[callee] < 1 {
 						continue
 					}
diff --git a/core/context/rcall/rcall_graph_test.go b/core/context/rcall/rcall_graph_test.go
index a06b8eed340c5c27c7fced3acd26926e04122d49..f8949c412132b13e20677b83dd00e26a7a8ea311 100644
--- a/core/context/rcall/rcall_graph_test.go
+++ b/core/context/rcall/rcall_graph_test.go
@@ -22,7 +22,7 @@ func TestRCallGraph_Analysis(t *testing.T) {
 
 	_ = json.Unmarshal(file, &parsedDeps)
 
-	content := analyser.Analysis("com.phodal.pholedge.book.BookFactory.create", *&parsedDeps)
+	content := analyser.Analysis("com.phodal.pholedge.book.BookFactory.create", *&parsedDeps, nil)
 
 	g.Expect(content).To(Equal(`digraph G {
 rankdir = LR;