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/*
 * Copyright 2014 Netflix, Inc.
 *
 * 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.reactivex.netty.contexts;

/**
 * An abstraction for the wire-format that the contexts get read from and written to. 

 * Since, the wire-format is pluggable, this supplier also is pluggable. 

 * For HTTP, this would fetch and write the contexts from the HTTP headers.
 *
 * @author Nitesh Kant
 */
public interface ContextKeySupplier {

    String getContextValue(String key);
}