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[MNG-5629] ClosedChannelException from DefaultUpdateCheckManager.read 

o Updated to stop producing 'ClosedChannelException's when reading tracking files.
o Updated to use 'Long.MAX_VALUE' as the size of any locked regions to prevent writing beyond locked regions.
o Updated to support shrinking of tracking files.
This commit is contained in:
Christian Schulte 2015-12-11 21:42:09 +01:00
parent e51fc87277
commit ca1179ce6a
1 changed files with 24 additions and 37 deletions
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61
maven-compat/src/main/java/org/apache/maven/repository/legacy/DefaultUpdateCheckManager.java
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@ -28,15 +28,12 @@ import org.apache.maven.repository.Proxy;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.logging.AbstractLogEnabled;
import org.codehaus.plexus.logging.Logger;
import org.codehaus.plexus.util.IOUtil;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.util.Date;
@ -242,18 +239,12 @@ public class DefaultUpdateCheckManager
Properties props = new Properties();
channel = new RandomAccessFile( touchfile, "rw" ).getChannel();
lock = channel.lock( 0, channel.size(), false );
lock = channel.lock();
if ( touchfile.canRead() )
{
getLogger().debug( "Reading resolution-state from: " + touchfile );
ByteBuffer buffer = ByteBuffer.allocate( (int) channel.size() );
channel.read( buffer );
buffer.flip();
ByteArrayInputStream stream = new ByteArrayInputStream( buffer.array() );
props.load( stream );
props.load( Channels.newInputStream( channel ) );
}
props.setProperty( key, Long.toString( System.currentTimeMillis() ) );
@ -267,18 +258,15 @@ public class DefaultUpdateCheckManager
props.remove( key + ERROR_KEY_SUFFIX );
}
ByteArrayOutputStream stream = new ByteArrayOutputStream();
getLogger().debug( "Writing resolution-state to: " + touchfile );
props.store( stream, "Last modified on: " + new Date() );
channel.truncate( 0 );
props.store( Channels.newOutputStream( channel ), "Last modified on: " + new Date() );
byte[] data = stream.toByteArray();
ByteBuffer buffer = ByteBuffer.allocate( data.length );
buffer.put( data );
buffer.flip();
lock.release();
lock = null;
channel.position( 0 );
channel.write( buffer );
channel.close();
channel = null;
}
catch ( IOException e )
{
@ -359,27 +347,26 @@ public class DefaultUpdateCheckManager
synchronized ( touchfile.getAbsolutePath().intern() )
{
FileInputStream in = null;
FileLock lock = null;
FileChannel channel = null;
try
{
Properties props = new Properties();
FileInputStream stream = new FileInputStream( touchfile );
try
{
channel = stream.getChannel();
lock = channel.lock( 0, channel.size(), true );
in = new FileInputStream( touchfile );
lock = in.getChannel().lock( 0, Long.MAX_VALUE, true );
getLogger().debug( "Reading resolution-state from: " + touchfile );
props.load( stream );
getLogger().debug( "Reading resolution-state from: " + touchfile );
props.load( in );
return props;
}
finally
{
IOUtil.close( stream );
}
lock.release();
lock = null;
in.close();
in = null;
return props;
}
catch ( IOException e )
{
@ -402,11 +389,11 @@ public class DefaultUpdateCheckManager
}
}
if ( channel != null )
if ( in != null )
{
try
{
channel.close();
in.close();
}
catch ( IOException e )
{