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Core Protocol Buffers library. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format.

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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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package com.google.protobuf;

/**
 * Blocking equivalent to {@link Service}.
 *
 * @author [email protected] Kenton Varda
 * @author [email protected] Chris Povirk
 */
public interface BlockingService {
  /** Equivalent to {@link Service#getDescriptorForType}. */
  Descriptors.ServiceDescriptor getDescriptorForType();

  /**
   * Equivalent to {@link Service#callMethod}, except that {@code callBlockingMethod()} returns the
   * result of the RPC or throws a {@link ServiceException} if there is a failure, rather than
   * passing the information to a callback.
   */
  Message callBlockingMethod(
      Descriptors.MethodDescriptor method, RpcController controller, Message request)
      throws ServiceException;

  /** Equivalent to {@link Service#getRequestPrototype}. */
  Message getRequestPrototype(Descriptors.MethodDescriptor method);

  /** Equivalent to {@link Service#getResponsePrototype}. */
  Message getResponsePrototype(Descriptors.MethodDescriptor method);
}