/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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.facebook.thrift.transport;

/** Server transport. Object which provides client transports. */
public abstract class TServerTransport {

  public abstract void listen() throws TTransportException;

  public final TTransport accept() throws TTransportException {
    TTransport transport = acceptImpl();
    if (transport == null) {
      throw new TTransportException("accept() may not return NULL");
    }
    return transport;
  }

  public abstract void close();

  protected abstract TTransport acceptImpl() throws TTransportException;

  /**
   * Optional method implementation. This signals to the server transport that it should break out
   * of any accept() or listen() that it is currently blocked on. This method, if implemented, MUST
   * be thread safe, as it may be called from a different thread context than the other
   * TServerTransport methods.
   */
  public void interrupt() {}
}
