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AdversarialFileSystemAbstraction.java
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AdversarialFileSystemAbstraction.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.adversaries.fs;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.nio.charset.Charset;
import java.nio.file.CopyOption;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import org.neo4j.adversaries.Adversary;
import org.neo4j.io.fs.DefaultFileSystemAbstraction;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.fs.StoreChannel;
import org.neo4j.io.fs.StoreFileChannel;
/**
* Used by the robustness suite to check for partial failures.
*/
@SuppressWarnings("unchecked")
public class AdversarialFileSystemAbstraction implements FileSystemAbstraction
{
private final FileSystemAbstraction delegate;
private final Adversary adversary;
public AdversarialFileSystemAbstraction( Adversary adversary )
{
this( adversary, new DefaultFileSystemAbstraction() );
}
public AdversarialFileSystemAbstraction( Adversary adversary, FileSystemAbstraction delegate )
{
this.adversary = adversary;
this.delegate = delegate;
}
public StoreChannel open( File fileName, String mode ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, IOException.class, SecurityException.class );
return AdversarialFileChannel.wrap( (StoreFileChannel) delegate.open( fileName, mode ), adversary );
}
public void renameFile( File from, File to, CopyOption... copyOptions ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, SecurityException.class );
delegate.renameFile( from, to, copyOptions );
}
public OutputStream openAsOutputStream( File fileName, boolean append ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, SecurityException.class );
return new AdversarialOutputStream( delegate.openAsOutputStream( fileName, append ), adversary );
}
public StoreChannel create( File fileName ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, IOException.class, SecurityException.class );
return AdversarialFileChannel.wrap( (StoreFileChannel) delegate.create( fileName ), adversary );
}
public boolean mkdir( File fileName )
{
adversary.injectFailure( SecurityException.class );
return delegate.mkdir( fileName );
}
public File[] listFiles( File directory )
{
adversary.injectFailure( SecurityException.class );
return delegate.listFiles( directory );
}
public File[] listFiles( File directory, FilenameFilter filter )
{
adversary.injectFailure( SecurityException.class );
return delegate.listFiles( directory, filter );
}
public Writer openAsWriter( File fileName, Charset charset, boolean append ) throws IOException
{
adversary.injectFailure(
UnsupportedEncodingException.class, FileNotFoundException.class, SecurityException.class );
return new AdversarialWriter( delegate.openAsWriter( fileName, charset, append ), adversary );
}
public Reader openAsReader( File fileName, Charset charset ) throws IOException
{
adversary.injectFailure(
UnsupportedEncodingException.class, FileNotFoundException.class, SecurityException.class );
return new AdversarialReader( delegate.openAsReader( fileName, charset ), adversary );
}
public long getFileSize( File fileName )
{
adversary.injectFailure( SecurityException.class );
return delegate.getFileSize( fileName );
}
public void copyFile( File from, File to ) throws IOException
{
adversary.injectFailure( SecurityException.class, FileNotFoundException.class, IOException.class );
delegate.copyFile( from, to );
}
public void copyRecursively( File fromDirectory, File toDirectory ) throws IOException
{
adversary.injectFailure( SecurityException.class, IOException.class, NullPointerException.class );
delegate.copyRecursively( fromDirectory, toDirectory );
}
public boolean deleteFile( File fileName )
{
adversary.injectFailure( SecurityException.class );
return delegate.deleteFile( fileName );
}
public InputStream openAsInputStream( File fileName ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, SecurityException.class );
return new AdversarialInputStream( delegate.openAsInputStream( fileName ), adversary );
}
public void moveToDirectory( File file, File toDirectory ) throws IOException
{
adversary.injectFailure(
SecurityException.class, IllegalArgumentException.class, FileNotFoundException.class,
NullPointerException.class, IOException.class );
delegate.moveToDirectory( file, toDirectory );
}
public boolean isDirectory( File file )
{
adversary.injectFailure( SecurityException.class );
return delegate.isDirectory( file );
}
public boolean fileExists( File fileName )
{
adversary.injectFailure( SecurityException.class );
return delegate.fileExists( fileName );
}
public void mkdirs( File fileName ) throws IOException
{
adversary.injectFailure( SecurityException.class, IOException.class );
delegate.mkdirs( fileName );
}
public void deleteRecursively( File directory ) throws IOException
{
adversary.injectFailure( SecurityException.class, NullPointerException.class, IOException.class );
delegate.deleteRecursively( directory );
}
private final Map<Class<? extends ThirdPartyFileSystem>, ThirdPartyFileSystem> thirdPartyFileSystems =
new HashMap<>();
public synchronized <K extends ThirdPartyFileSystem> K getOrCreateThirdPartyFileSystem(
Class<K> clazz,
Function<Class<K>, K> creator )
{
ThirdPartyFileSystem fileSystem = thirdPartyFileSystems.get( clazz );
if (fileSystem == null)
{
fileSystem = creator.apply( clazz );
fileSystem = adversarialProxy( fileSystem, clazz );
thirdPartyFileSystems.put( clazz, fileSystem );
}
return (K) fileSystem;
}
public void truncate( File path, long size ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, IOException.class, IllegalArgumentException.class,
SecurityException.class, NullPointerException.class );
delegate.truncate( path, size );
}
@Override
public long lastModifiedTime( File file ) throws IOException
{
adversary.injectFailure( FileNotFoundException.class, IOException.class, SecurityException.class,
NullPointerException.class );
return delegate.lastModifiedTime( file );
}
private <K extends ThirdPartyFileSystem> ThirdPartyFileSystem adversarialProxy(
final ThirdPartyFileSystem fileSystem,
Class<K> clazz )
{
InvocationHandler handler = new InvocationHandler()
{
@Override
public Object invoke( Object proxy, Method method, Object[] args ) throws Throwable
{
adversary.injectFailure( (Class<? extends Throwable>[]) method.getExceptionTypes() );
return method.invoke( fileSystem, args );
}
};
ClassLoader loader = Thread.currentThread().getContextClassLoader();
return (ThirdPartyFileSystem) Proxy.newProxyInstance( loader, new Class[] { clazz }, handler );
}
}