package org.apache.maven.plugin.surefire.report;
   
   /*
    * 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.
   */
  
  import java.io.BufferedOutputStream;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.FilterOutputStream;
  import java.io.IOException;
  import java.util.concurrent.atomic.AtomicStampedReference;
  import java.util.concurrent.locks.ReentrantLock;
  
  import org.apache.maven.surefire.booter.DumpErrorSingleton;
  import org.apache.maven.surefire.report.ReportEntry;
  
  import static org.apache.maven.plugin.surefire.report.FileReporter.getReportFile;
  
  /**
   * Surefire output consumer proxy that writes test output to a {@link java.io.File} for each test suite.
   *
   * @author Kristian Rosenvold
   * @author Carlos Sanchez
   */
  public class ConsoleOutputFileReporter
      implements TestcycleConsoleOutputReceiver
  {
      private static final int STREAM_BUFFER_SIZE = 16 * 1024;
      private static final int OPEN = 0;
      private static final int CLOSED_TO_REOPEN = 1;
      private static final int CLOSED = 2;
  
      private final File reportsDirectory;
      private final String reportNameSuffix;
  
      private final AtomicStampedReference<FilterOutputStream> fileOutputStream =
              new AtomicStampedReference<FilterOutputStream>( null, OPEN );
  
      private final ReentrantLock lock = new ReentrantLock();
  
      private volatile String reportEntryName;
  
      public ConsoleOutputFileReporter( File reportsDirectory, String reportNameSuffix )
      {
          this.reportsDirectory = reportsDirectory;
          this.reportNameSuffix = reportNameSuffix;
      }
  
      @Override
      public void testSetStarting( ReportEntry reportEntry )
      {
          lock.lock();
          try
          {
              closeNullReportFile( reportEntry );
          }
          finally
          {
              lock.unlock();
          }
      }
  
      @Override
      public void testSetCompleted( ReportEntry report )
      {
      }
  
      @Override
      public void close()
      {
          // The close() method is called in main Thread T2.
          lock.lock();
          try
          {
              closeReportFile();
          }
          finally
          {
              lock.unlock();
          }
      }
  
      @Override
     public void writeTestOutput( byte[] buf, int off, int len, boolean stdout )
     {
         lock.lock();
         try
         {
             // This method is called in single thread T1 per fork JVM (see ThreadedStreamConsumer).
             // The close() method is called in main Thread T2.
             int[] status = new int[1];
             FilterOutputStream os = fileOutputStream.get( status );
             if ( status[0] != CLOSED )
             {
                 if ( os == null )
                 {
                     if ( !reportsDirectory.exists() )
                     {
                         //noinspection ResultOfMethodCallIgnored
                         reportsDirectory.mkdirs();
                     }
                     File file = getReportFile( reportsDirectory, reportEntryName, reportNameSuffix, "-output.txt" );
                     os = new BufferedOutputStream( new FileOutputStream( file ), STREAM_BUFFER_SIZE );
                     fileOutputStream.set( os, OPEN );
                 }
                 os.write( buf, off, len );
             }
         }
         catch ( IOException e )
         {
             DumpErrorSingleton.getSingleton()
                     .dumpException( e );
 
             throw new RuntimeException( e );
         }
         finally
         {
             lock.unlock();
         }
     }
 
     @SuppressWarnings( "checkstyle:emptyblock" )
     private void closeNullReportFile( ReportEntry reportEntry )
     {
         try
         {
             // close null-output.txt report file
             close( true );
         }
         catch ( IOException ignored )
         {
             DumpErrorSingleton.getSingleton()
                     .dumpException( ignored );
         }
         finally
         {
             // prepare <class>-output.txt report file
             reportEntryName = reportEntry.getName();
         }
     }
 
     @SuppressWarnings( "checkstyle:emptyblock" )
     private void closeReportFile()
     {
         try
         {
             close( false );
         }
         catch ( IOException ignored )
         {
             DumpErrorSingleton.getSingleton()
                     .dumpException( ignored );
         }
     }
 
     private void close( boolean closeReattempt )
             throws IOException
     {
         int[] status = new int[1];
         FilterOutputStream os = fileOutputStream.get( status );
         if ( status[0] != CLOSED )
         {
             fileOutputStream.set( null, closeReattempt ? CLOSED_TO_REOPEN : CLOSED );
             if ( os != null && status[0] == OPEN )
             {
                 os.close();
             }
         }
     }
 }