[GitHub] [skywalking] lorgine opened a new issue #6695: java.lang.AbstractMethodError error

[GitBox <gi...@apache.org>]

lorgine opened a new issue #6695:
URL: https://github.com/apache/skywalking/issues/6695


   when i want to enhance spring filter,and it happens an error like under below?
   
   `public class FilterInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
       private static final String ENHANCE_CLASS = "javax.servlet.Filter";
       private static final String INTERCEPT_CLASS = "org.apache.skywalking.apm.plugin.spring.FilterInterceptor1";
       private static final String CONSTRUCTOR_CLASS = "org.apache.skywalking.apm.plugin.spring.FilterConstructorInterceptor";
       @Override
       protected ClassMatch enhanceClass() {
           return PrefixMatch.nameStartsWith("com.ppdai.infrastructure.demo.CatServletFilter");
       }
   
       @Override
       public ConstructorInterceptPoint[] getConstructorsInterceptPoints() {
           /*return new ConstructorInterceptPoint[]{
                   new ConstructorInterceptPoint() {
                       @Override
                       public ElementMatcher<MethodDescription> getConstructorMatcher() {
                           return any();
                       }
   
                       @Override
                       public String getConstructorInterceptor() {
                           return CONSTRUCTOR_CLASS;
                       }
                   }
           };*/
           return new ConstructorInterceptPoint[0];
   
       }
   
       @Override
       public InstanceMethodsInterceptPoint[] getInstanceMethodsInterceptPoints() {
           return new InstanceMethodsInterceptPoint[]{
                   new InstanceMethodsInterceptPoint() {
                       @Override
                       public ElementMatcher<MethodDescription> getMethodsMatcher() {
                           return named("doFilter").and(takesArguments(3));
                       }
   
                       @Override
                       public String getMethodsInterceptor() {
                           return INTERCEPT_CLASS;
                       }
   
                       @Override
                       public boolean isOverrideArgs() {
                           return false;
                       }
                   }
           };
       }
   }`
   
   
   and 
   
   `public class FilterInterceptor1 implements InstanceMethodsAroundInterceptor {
   
       @Override
       public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, MethodInterceptResult result) throws Throwable {
   
       }
   
       @Override
       public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, Object ret) throws Throwable {
           return ret;
       }
   
       @Override
       public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, Throwable t) {
   
       }
   }`
   
   
   `
   @WebFilter
   public class CatServletFilter  implements Filter {
       @Override
       public void init(FilterConfig filterConfig) throws ServletException {
   
       }
   
       @Override
       public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
           chain.doFilter(request,response);
       }
   
       @Override
       public void destroy() {
   
       }
   }
   `


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[GitHub] [skywalking] wu-sheng closed issue #6695: java.lang.AbstractMethodError error

[GitBox <gi...@apache.org>]

wu-sheng closed issue #6695:
URL: https://github.com/apache/skywalking/issues/6695


   


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[GitHub] [skywalking] wu-sheng commented on issue #6695: java.lang.AbstractMethodError error

[GitBox <gi...@apache.org>]

wu-sheng commented on issue #6695:
URL: https://github.com/apache/skywalking/issues/6695#issuecomment-813879035


   Your description is chaotic, please make it well-formatted. 


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