content: /*
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * 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.alibaba.graphscope.common.client.channel;
  
  import com.alibaba.graphscope.common.config.Configs;
  import com.alibaba.graphscope.common.config.PegasusConfig;
  import com.alibaba.graphscope.common.config.Utils;
  import com.alibaba.pegasus.RpcChannel;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * rpc implementation of {@link ChannelFetcher}, init rpc from local config
   */
  public class HostsRpcChannelFetcher implements ChannelFetcher<RpcChannel> {
      private final List<RpcChannel> rpcChannels;
  
      public HostsRpcChannelFetcher(Configs config) {
          this.rpcChannels =
                  Utils.convertDotString(PegasusConfig.PEGASUS_HOSTS.get(config)).stream()
                          .map(
                                  k -> {
                                      String[] host = k.split(":");
                                      return new RpcChannel(host[0], Integer.valueOf(host[1]));
                                  })
                          .collect(Collectors.toList());
      }
  
      @Override
      public List<RpcChannel> fetch() {
          return Collections.unmodifiableList(rpcChannels);
      }
  
      @Override
      public Type getType() {
          return Type.RPC;
      }
  }
  