/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* 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.kie.scanner;
import java.io.File;
import java.io.IOException;
import java.util.UUID;
class IoUtils {
public static File getTmpDirectory() {
File tmp = new File( System.getProperty( "java.io.tmpdir" ) );
File f = new File( tmp, "_kie_repo_" + UUID.randomUUID().toString() );
//files.add( f );
if ( f.exists() ) {
if ( f.isFile() ) {
throw new IllegalStateException( "The temp directory exists as a file. Nuke it now !" );
}
deleteDir( f );
f.mkdir();
} else {
f.mkdir();
}
return f;
}
private static void deleteDir(File dir) {
// Will throw RuntimeException is anything fails to delete
String[] children = dir.list();
for ( String child : children ) {
File file = new File( dir,
child );
if ( file.isFile() ) {
deleteFile( file );
} else {
deleteDir( file );
}
}
deleteFile( dir );
}
private static void deleteFile(File file) {
// This will attempt to delete a file 5 times, calling GC and Sleep between each iteration
// Sometimes windows takes a while to release a lock on a file.
// Throws an exception if it fails to delete
if ( !file.delete() ) {
int count = 0;
while ( !file.delete() && count++ < 5 ) {
System.gc();
try {
Thread.sleep( 250 );
} catch ( InterruptedException e ) {
throw new RuntimeException( "This should never happen" );
}
}
}
if ( file.exists() ) {
try {
throw new RuntimeException( "Unable to delete file:" + file.getCanonicalPath() );
} catch ( IOException e ) {
throw new RuntimeException( "Unable to delete file", e);
}
}
}
}