content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.beam.runners.dataflow.worker.windmill;
  
  import java.io.PrintWriter;
  import org.apache.beam.runners.dataflow.worker.status.StatusDataProvider;
  
  /** Stub for communicating with a Windmill server. */
  public abstract class WindmillServerStub
      implements ApplianceWindmillClient, StreamingEngineWindmillClient, StatusDataProvider {
  
    @Override
    public void appendSummaryHtml(PrintWriter writer) {}
  
    /**
     * Generic Exception type for implementors to use to represent errors while making Windmill RPCs.
     */
    public static final class WindmillRpcException extends RuntimeException {
      public WindmillRpcException(Throwable cause) {
        super(cause);
      }
  
      public WindmillRpcException(String message, Throwable cause) {
        super(message, cause);
      }
    }
  }
  