com.alipay.sofa.tracer.plugins.springcloud.carriers.FeignRequestHeadersCarrier Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of sofa-tracer-spring-cloud-plugin Show documentation

The newest version!

/*
 * 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.alipay.sofa.tracer.plugins.springcloud.carriers;

import io.opentracing.propagation.TextMap;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

/**
 * @author: guolei.sgl ([email protected]) 2019/3/13 5:09 PM
 * @since:
 **/
public class FeignRequestHeadersCarrier implements TextMap {

    private Map> headers;

    public FeignRequestHeadersCarrier(Map> headers) {
        if (headers == null) {
            throw new NullPointerException("Headers request should not be null!");
        }
        this.headers = headers;
    }

    @Override
    public Iterator> iterator() {
        throw new UnsupportedOperationException();
    }

    @Override
    public void put(String key, String val) {
        Collection vals = headers.get(key);
        if (vals == null) {
            vals = new ArrayList<>();
        }
        vals.add(val);
        headers.put(key, vals);
    }
}