content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.csp.sentinel.adapter.dubbo;
  
  import com.alibaba.csp.sentinel.util.StringUtil;
  import com.alibaba.dubbo.rpc.Filter;
  import com.alibaba.dubbo.rpc.Invocation;
  import com.alibaba.dubbo.rpc.Invoker;
  
  /**
   * @author leyou
   */
  abstract class AbstractDubboFilter implements Filter {
  
      protected String getMethodResourceName(Invoker<?> invoker, Invocation invocation) {
          StringBuilder buf = new StringBuilder(64);
          buf.append(invoker.getInterface().getName())
              .append(":")
              .append(invocation.getMethodName())
              .append("(");
          boolean isFirst = true;
          for (Class<?> clazz : invocation.getParameterTypes()) {
              if (!isFirst) {
                  buf.append(",");
              }
              buf.append(clazz.getName());
              isFirst = false;
          }
          buf.append(")");
          return buf.toString();
      }
  
      protected String getMethodResourceName(Invoker<?> invoker, Invocation invocation, String prefix) {
          if (StringUtil.isBlank(prefix)) {
              return getMethodResourceName(invoker, invocation);
          }
          StringBuilder buf = new StringBuilder(64);
          return buf.append(prefix)
              .append(getMethodResourceName(invoker, invocation))
              .toString();
      }
  
      protected String getInterfaceName(Invoker<?> invoker) {
          return invoker.getInterface().getName();
      }
  
      protected String getInterfaceName(Invoker<?> invoker, String prefix) {
          if (StringUtil.isBlank(prefix)) {
              return getInterfaceName(invoker);
          }
          return prefix + getInterfaceName(invoker);
      }
  }
  