code: /**
   * 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.hadoop.yarn.logaggregation.filecontroller;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
  import org.apache.hadoop.yarn.api.records.ApplicationId;
  import org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat;
  import org.apache.hadoop.yarn.logaggregation.ContainerLogMeta;
  import org.apache.hadoop.yarn.logaggregation.ContainerLogsRequest;
  import org.apache.hadoop.yarn.webapp.View;
  import org.apache.hadoop.yarn.webapp.view.HtmlBlock;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.List;
  import java.util.Map;
  
  public class FakeLogAggregationFileController
      extends LogAggregationFileController {
  
    @Override
    protected void initInternal(Configuration conf) {
  
    }
  
    @Override
    public void initializeWriter(LogAggregationFileControllerContext context)
        throws IOException {
  
    }
  
    @Override
    public void closeWriter() throws LogAggregationDFSException {
  
    }
  
    @Override
    public void write(AggregatedLogFormat.LogKey logKey,
                      AggregatedLogFormat.LogValue logValue) throws IOException {
  
    }
  
    @Override
    public void postWrite(LogAggregationFileControllerContext record)
        throws Exception {
  
    }
  
    @Override
    public boolean readAggregatedLogs(ContainerLogsRequest logRequest,
                                      OutputStream os) throws IOException {
      return false;
    }
  
    @Override
    public List<ContainerLogMeta> readAggregatedLogsMeta(
        ContainerLogsRequest logRequest) throws IOException {
      return null;
    }
  
    @Override
    public void renderAggregatedLogsBlock(HtmlBlock.Block html,
                                          View.ViewContext context) {
  
    }
  
    @Override
    public String getApplicationOwner(Path aggregatedLogPath,
                                      ApplicationId appId) throws IOException {
      return null;
    }
  
    @Override
    public Map<ApplicationAccessType, String> getApplicationAcls(
        Path aggregatedLogPath, ApplicationId appId) throws IOException {
      return null;
    }
  }
  