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/*
 * Tencent is pleased to support the open source community by making Polaris available.
 *
 * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * 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.tencent.polaris.test.mock.discovery;

import com.tencent.polaris.logging.LoggerFactory;
import io.grpc.ForwardingServerCall;
import io.grpc.Metadata;
import io.grpc.ServerCall;
import io.grpc.ServerCallHandler;
import io.grpc.ServerInterceptor;
import org.slf4j.Logger;

public class HeaderInterceptor implements ServerInterceptor {

    private static final Logger LOG = LoggerFactory.getLogger(HeaderInterceptor.class);

    @Override
    public  ServerCall.Listener interceptCall(
            ServerCall call, Metadata headers, ServerCallHandler next) {
        LOG.debug("header received from client:" + headers);
        return next.startCall(new ForwardingServerCall.SimpleForwardingServerCall(call) {}, headers);
    }
}