import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.QJournalProtocolService; //导入依赖的package包/类
JournalNodeRpcServer(Configuration conf, JournalNode jn) throws IOException {
  this.jn = jn;
  
  Configuration confCopy = new Configuration(conf);
  
  // Ensure that nagling doesn't kick in, which could cause latency issues.
  confCopy.setBoolean(
      CommonConfigurationKeysPublic.IPC_SERVER_TCPNODELAY_KEY,
      true);
  
  InetSocketAddress addr = getAddress(confCopy);
  RPC.setProtocolEngine(confCopy, QJournalProtocolPB.class,
      ProtobufRpcEngine.class);
  QJournalProtocolServerSideTranslatorPB translator =
      new QJournalProtocolServerSideTranslatorPB(this);
  BlockingService service = QJournalProtocolService
      .newReflectiveBlockingService(translator);
  
  this.server = new RPC.Builder(confCopy)
    .setProtocol(QJournalProtocolPB.class)
    .setInstance(service)
    .setBindAddress(addr.getHostName())
    .setPort(addr.getPort())
    .setNumHandlers(HANDLER_COUNT)
    .setVerbose(false)
    .build();

  // set service-level authorization security policy
  if (confCopy.getBoolean(
    CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) {
        server.refreshServiceAcl(confCopy, new HDFSPolicyProvider());
  }
}
 

import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.QJournalProtocolService; //导入依赖的package包/类
JournalNodeRpcServer(Configuration conf, JournalNode jn) throws IOException {
  this.jn = jn;
  
  Configuration confCopy = new Configuration(conf);
  
  // Ensure that nagling doesn't kick in, which could cause latency issues.
  confCopy.setBoolean(
      CommonConfigurationKeysPublic.IPC_SERVER_TCPNODELAY_KEY,
      true);
  
  InetSocketAddress addr = getAddress(confCopy);
  RPC.setProtocolEngine(confCopy, QJournalProtocolPB.class,
      ProtobufRpcEngine.class);
  QJournalProtocolServerSideTranslatorPB translator =
      new QJournalProtocolServerSideTranslatorPB(this);
  BlockingService service = QJournalProtocolService
      .newReflectiveBlockingService(translator);
  
  this.server = new RPC.Builder(confCopy)
    .setProtocol(QJournalProtocolPB.class)
    .setInstance(service)
    .setBindAddress(addr.getHostName())
    .setPort(addr.getPort())
    .setNumHandlers(HANDLER_COUNT)
    .setVerbose(false)
    .build();

  // set service-level authorization security policy
  if (confCopy.getBoolean(
    CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) {
        server.refreshServiceAcl(confCopy, new HDFSPolicyProvider());
  }
  this.server.setTracer(jn.tracer);
}