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.slots.logger;
  
  import com.alibaba.csp.sentinel.Constants;
  import com.alibaba.csp.sentinel.log.RecordLog;
  import com.alibaba.csp.sentinel.context.Context;
  import com.alibaba.csp.sentinel.node.DefaultNode;
  import com.alibaba.csp.sentinel.slotchain.AbstractLinkedProcessorSlot;
  import com.alibaba.csp.sentinel.slotchain.ResourceWrapper;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import com.alibaba.csp.sentinel.spi.Spi;
  
  /**
   * A {@link com.alibaba.csp.sentinel.slotchain.ProcessorSlot} that is response for logging block exceptions
   * to provide concrete logs for troubleshooting.
   */
  @Spi(order = Constants.ORDER_LOG_SLOT)
  public class LogSlot extends AbstractLinkedProcessorSlot<DefaultNode> {
  
      @Override
      public void entry(Context context, ResourceWrapper resourceWrapper, DefaultNode obj, int count, boolean prioritized, Object... args)
          throws Throwable {
          try {
              fireEntry(context, resourceWrapper, obj, count, prioritized, args);
          } catch (BlockException e) {
              EagleEyeLogUtil.log(resourceWrapper.getName(), e.getClass().getSimpleName(), e.getRuleLimitApp(),
                  context.getOrigin(), e.getRule() != null ? e.getRule().getId() : null, count);
              throw e;
          } catch (Throwable e) {
              RecordLog.warn("Unexpected entry exception", e);
          }
      }
  
      @Override
      public void exit(Context context, ResourceWrapper resourceWrapper, int count, Object... args) {
          try {
              fireExit(context, resourceWrapper, count, args);
          } catch (Throwable e) {
              RecordLog.warn("Unexpected entry exit exception", e);
          }
      }
  }
  