io.opentracing.contrib.agent.jnet.propagation.HttpURLConnectionInjectAdapter Maven / Gradle / Ivy

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/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * 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 io.opentracing.contrib.agent.jnet.propagation;

import java.net.HttpURLConnection;
import java.util.Iterator;
import java.util.Map;

import io.opentracing.propagation.TextMap;

/**
 * Inject adapter for use with {@link HttpURLConnection}.
 */
public final class HttpURLConnectionInjectAdapter implements TextMap {

    private final HttpURLConnection connection;

    public HttpURLConnectionInjectAdapter(Object connection) {
        this.connection = (HttpURLConnection)connection;
    }

    @Override
    public Iterator> iterator() {
        throw new UnsupportedOperationException("HttpURLConnectionInjectAdapter should only be used with Tracer.inject()");
    }

    @Override
    public void put(String key, String value) {
        connection.addRequestProperty(key, value);
    }
}