com.huaweicloud.dtm.consumer.feign.DtmRequestInterceptor Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.huaweicloud.dtm.consumer.feign;

import java.util.Map;

import org.apache.servicecomb.foundation.common.utils.JsonUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.huaweicloud.dtm.DtmConstants;

import feign.RequestInterceptor;
import feign.RequestTemplate;

/**
 * @Author wangqijun
 * @Date 09:52 2019-09-26
 **/
public class DtmRequestInterceptor implements RequestInterceptor {

  private static final Logger LOGGER = LoggerFactory.getLogger(DtmRequestInterceptor.class);

  @Override
  public void apply(RequestTemplate template) {
    if (DtmConstants.DTM_CONTEXT_EX_METHOD == null) {
      return;
    }
    try {
      Object context = DtmConstants.DTM_CONTEXT_EX_METHOD.invoke(null);
      if (context instanceof Map) {
        template.header(DtmConstants.DTM_CONTEXT, JsonUtils.OBJ_MAPPER.writeValueAsString(context));
      }
    } catch (Throwable e) {
      // ignore
      LOGGER.warn("Failed to export dtm context", e);
    }
  }
}