问我们需要在WebRTC中进行会话吗？

EN

public class UserSession {

  private static final Logger log = LoggerFactory.getLogger(UserSession.class);

  private final String name;
  private final WebSocketSession session;

  private String sdpOffer;
  private String callingTo;
  private String callingFrom;
  private WebRtcEndpoint webRtcEndpoint;
  private WebRtcEndpoint playingWebRtcEndpoint;
  private final List<IceCandidate> candidateList = new ArrayList<>();

  public UserSession(WebSocketSession session, String name) {
    this.session = session;
    this.name = name;
  }

  public void sendMessage(JsonObject message) throws IOException {
    log.debug("Sending message from user '{}': {}", name, message);
    session.sendMessage(new TextMessage(message.toString()));
  }

  public String getSessionId() {
    return session.getId();
  }

  public void setWebRtcEndpoint(WebRtcEndpoint webRtcEndpoint) {
    this.webRtcEndpoint = webRtcEndpoint;

    if (this.webRtcEndpoint != null) {
      for (IceCandidate e : candidateList) {
        this.webRtcEndpoint.addIceCandidate(e);
      }
      this.candidateList.clear();
    }
  }

  public void addCandidate(IceCandidate candidate) {
    if (this.webRtcEndpoint != null) {
      this.webRtcEndpoint.addIceCandidate(candidate);
    } else {
      candidateList.add(candidate);
    }

    if (this.playingWebRtcEndpoint != null) {
      this.playingWebRtcEndpoint.addIceCandidate(candidate);
    }
  }

  public void clear() {
    this.webRtcEndpoint = null;
    this.candidateList.clear();
  }
}