Fix

Author: huicunjun

apm-sniffer/apm-sdk-plugin/grpc-1.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/grpc/v1/define/AbstractServerImplBuilderInstrumentation.java

@@ -31,6 +31,9 @@
 
 public class AbstractServerImplBuilderInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
 
+    public static final String ENHANCE_METHOD = "build";
+    public static final String INTERCEPT_CLASS = "org.apache.skywalking.apm.plugin.grpc.v1.server.AbstractServerImplBuilderInterceptor";
+
     @Override
     public ConstructorInterceptPoint[] getConstructorsInterceptPoints() {
         return new ConstructorInterceptPoint[0];
@@ -42,12 +45,12 @@ public InstanceMethodsInterceptPoint[] getInstanceMethodsInterceptPoints() {
             new InstanceMethodsInterceptPoint() {
                 @Override
                 public ElementMatcher<MethodDescription> getMethodsMatcher() {
-                    return named("build").and(takesNoArguments());
+                    return named(ENHANCE_METHOD).and(takesNoArguments());
                 }
 
                 @Override
                 public String getMethodsInterceptor() {
-                    return "org.apache.skywalking.apm.plugin.grpc.v1.server.AbstractServerImplBuilderInterceptor";
+                    return INTERCEPT_CLASS;
                 }
 
                 @Override