content: /*
   * Copyright 1999-2020 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
   *
   *      https://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.motan;
  
  import com.alibaba.csp.sentinel.*;
  import com.alibaba.csp.sentinel.adapter.motan.config.MotanAdapterGlobalConfig;
  import com.alibaba.csp.sentinel.context.ContextUtil;
  import com.alibaba.csp.sentinel.log.RecordLog;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import com.weibo.api.motan.common.MotanConstants;
  import com.weibo.api.motan.core.extension.Activation;
  import com.weibo.api.motan.core.extension.SpiMeta;
  import com.weibo.api.motan.exception.MotanAbstractException;
  import com.weibo.api.motan.filter.Filter;
  import com.weibo.api.motan.rpc.Caller;
  import com.weibo.api.motan.rpc.Request;
  import com.weibo.api.motan.rpc.Response;
  import java.util.Map;
  
  /**
   * @author zhangxn8
   */
  @Activation(key = MotanConstants.NODE_TYPE_SERVICE)
  @SpiMeta(name = MotanAdapterGlobalConfig.SENTINEL_MOTAN_PROVIDER)
  public class SentinelMotanProviderFilter implements Filter {
  
      public SentinelMotanProviderFilter(){
          RecordLog.info("Sentinel motan provider filter initialized");
      }
  
      @Override
      public Response filter(Caller<?> caller, Request request) {
          Entry interfaceEntry = null;
          Entry methodEntry = null;
          Map<String, String> attachment = request.getAttachments();
          String origin = attachment.getOrDefault(MotanAdapterGlobalConfig.APPLICATION, MotanAdapterGlobalConfig.MOTAN);
          String prefix = MotanAdapterGlobalConfig.getMotanProviderPrefix();
          String interfaceResourceName = MotanUtils.getInterfaceName(caller, prefix);
          String methodResourceName = MotanUtils.getMethodResourceName(caller, request, prefix);
          try {
              ContextUtil.enter(methodResourceName, origin);
              interfaceEntry = SphU.entry(interfaceResourceName, ResourceTypeConstants.COMMON_RPC, EntryType.IN);
              methodEntry = SphU.entry(methodResourceName, ResourceTypeConstants.COMMON_RPC, EntryType.IN,
                      request.getArguments());
              Response result = caller.call(request);
              if (result.getException() != null) {
                  Tracer.traceEntry(result.getException(), interfaceEntry);
                  Tracer.traceEntry(result.getException(), methodEntry);
              }
              return result;
          } catch (BlockException e) {
              return MotanAdapterGlobalConfig.getProviderFallback().handle(caller, request, e);
          } catch (MotanAbstractException e) {
              Tracer.traceEntry(e, interfaceEntry);
              Tracer.traceEntry(e, methodEntry);
              throw e;
          } finally {
              if (methodEntry != null) {
                  methodEntry.exit(1, request.getArguments());
              }
              if (interfaceEntry != null) {
                  interfaceEntry.exit();
              }
              ContextUtil.exit();
          }
      }
  }
  