content: /*
   * Copyright 2020  Google LLC
   *
   * 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 com.taobao.arthas.grpcweb.proxy;
  
  import io.grpc.Channel;
  import io.grpc.ClientInterceptors;
  import io.grpc.ManagedChannel;
  import io.grpc.ManagedChannelBuilder;
  import com.alibaba.arthas.deps.org.slf4j.Logger;
  import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
  
  import java.lang.invoke.MethodHandles;
  
  /**
   * TODO: Manage the connection pool to talk to the grpc-service
   */
  public class GrpcServiceConnectionManager {
      private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass().getName());
      private final ManagedChannel channel;
  
      public GrpcServiceConnectionManager(int grpcPortNum) {
          // TODO: Manage a connection pool.
          channel = ManagedChannelBuilder.forAddress("localhost", grpcPortNum).usePlaintext().build();
          logger.info("**** connection channel initiated");
      }
  
      Channel getChannelWithClientInterceptor(GrpcWebClientInterceptor interceptor) {
          return ClientInterceptors.intercept(channel, interceptor);
      }
  
      public ManagedChannel getChannel() {
          return channel;
      }
  }
  