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.node;
  
  import com.alibaba.csp.sentinel.context.Context;
  import com.alibaba.csp.sentinel.context.ContextUtil;
  import com.alibaba.csp.sentinel.slotchain.ResourceWrapper;
  import com.alibaba.csp.sentinel.slots.nodeselector.NodeSelectorSlot;
  
  /**
   * <p>
   * A {@link Node} represents the entrance of the invocation tree.
   * </p>
   * <p>
   * One {@link Context} will related to a {@link EntranceNode},
   * which represents the entrance of the invocation tree. New {@link EntranceNode} will be created if
   * current context does't have one. Note that same context name will share same {@link EntranceNode}
   * globally.
   * </p>
   *
   * @author qinan.qn
   * @see ContextUtil
   * @see ContextUtil#enter(String, String)
   * @see NodeSelectorSlot
   */
  public class EntranceNode extends DefaultNode {
  
      public EntranceNode(ResourceWrapper id, ClusterNode clusterNode) {
          super(id, clusterNode);
      }
  
      @Override
      public double avgRt() {
          double total = 0;
          double totalQps = 0;
          for (Node node : getChildList()) {
              total += node.avgRt() * node.passQps();
              totalQps += node.passQps();
          }
          return total / (totalQps == 0 ? 1 : totalQps);
      }
  
      @Override
      public double blockQps() {
          double blockQps = 0;
          for (Node node : getChildList()) {
              blockQps += node.blockQps();
          }
          return blockQps;
      }
  
      @Override
      public long blockRequest() {
          long r = 0;
          for (Node node : getChildList()) {
              r += node.blockRequest();
          }
          return r;
      }
  
      @Override
      public int curThreadNum() {
          int r = 0;
          for (Node node : getChildList()) {
              r += node.curThreadNum();
          }
          return r;
      }
  
      @Override
      public double totalQps() {
          double r = 0;
          for (Node node : getChildList()) {
              r += node.totalQps();
          }
          return r;
      }
  
      @Override
      public double successQps() {
          double r = 0;
          for (Node node : getChildList()) {
              r += node.successQps();
          }
          return r;
      }
  
      @Override
      public double passQps() {
          double r = 0;
          for (Node node : getChildList()) {
              r += node.passQps();
          }
          return r;
      }
  
      @Override
      public long totalRequest() {
          long r = 0;
          for (Node node : getChildList()) {
              r += node.totalRequest();
          }
          return r;
      }
  
      @Override
      public long totalPass() {
          long r = 0;
          for (Node node : getChildList()) {
              r += node.totalPass();
          }
          return r;
      }
  }
  