// Copyright 2020 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.lib.remote.common;

import com.google.longrunning.Operation;
import java.io.IOException;

/** Receives {@link Operation} updates from an stream of messages. */
public interface OperationObserver {
  /** Receives a value from the stream. */
  void onNext(Operation o) throws IOException;

  /** A no-op implementation */
  OperationObserver NO_OP = o -> {};
}