public void close()

in ratis-server/src/main/java/org/apache/ratis/server/impl/RaftServerImpl.java [528:575]
48 lines of code
9 McCabe index (conditional complexity)

  public void close() {
    lifeCycle.checkStateAndClose(() -> {
      LOG.info("{}: shutdown", getMemberId());
      try {
        jmxAdapter.unregister();
      } catch (Exception e) {
        LOG.warn("{}: Failed to un-register RaftServer JMX bean", getMemberId(), e);
      }
      try {
        role.shutdownFollowerState();
      } catch (Exception e) {
        LOG.warn("{}: Failed to shutdown FollowerState", getMemberId(), e);
      }
      try{
        role.shutdownLeaderElection();
      } catch (Exception e) {
        LOG.warn("{}: Failed to shutdown LeaderElection", getMemberId(), e);
      }
      try{
        role.shutdownLeaderState(true).join();
      } catch (Exception e) {
        LOG.warn("{}: Failed to shutdown LeaderState monitor", getMemberId(), e);
      }
      try{
        state.close();
      } catch (Exception e) {
        LOG.warn("{}: Failed to close state", getMemberId(), e);
      }
      try {
        leaderElectionMetrics.unregister();
        raftServerMetrics.unregister();
        RaftServerMetricsImpl.removeRaftServerMetrics(getMemberId());
      } catch (Exception e) {
        LOG.warn("{}: Failed to unregister metric", getMemberId(), e);
      }
      try {
        ConcurrentUtils.shutdownAndWait(clientExecutor);
      } catch (Exception e) {
        LOG.warn(getMemberId() + ": Failed to shutdown clientExecutor", e);
      }
      try {
        ConcurrentUtils.shutdownAndWait(serverExecutor);
      } catch (Exception e) {
        LOG.warn(getMemberId() + ": Failed to shutdown serverExecutor", e);
      }
      closeFinishedLatch.countDown();
    });
  }