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Core functionality for the RSocket library

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/*
 * Copyright 2015-2020 the original author or authors.
 *
 * 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 io.rsocket.transport;

import io.rsocket.Closeable;
import io.rsocket.DuplexConnection;
import java.util.function.Function;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Mono;

/** A server contract for writing transports of RSocket. */
public interface ServerTransport extends Transport {

  /**
   * Start this server.
   *
   * @param acceptor to process a newly accepted connections with
   * @return A handle for information about and control over the server.
   * @since 1.0.1
   */
  Mono start(ConnectionAcceptor acceptor);

  /** A contract to accept a new {@code DuplexConnection}. */
  interface ConnectionAcceptor extends Function> {

    /**
     * Accept a new {@code DuplexConnection} and returns {@code Publisher} signifying the end of
     * processing of the connection.
     *
     * @param duplexConnection New {@code DuplexConnection} to be processed.
     * @return A {@code Publisher} which terminates when the processing of the connection finishes.
     */
    @Override
    Mono apply(DuplexConnection duplexConnection);
  }
}