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/*
* Copyright (c) 2008, intarsys consulting GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of intarsys nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package de.intarsys.tools.file;
import java.io.File;
import java.io.FileFilter;
/**
* Tools for dealing with temporary files and directories.
*
* This class provides a locked, VM unique temp directory. Upon startup,
* unlocked directories are removed.
*/
public class TempTools {
private static File tempDir;
private static File tempDirVM;
private static FileTools.Lock lock;
private static int fileCounter = 0;
private static int dirCounter = 0;
static {
cleanUp();
}
/**
* Clean up temporary directories.
*/
protected static void cleanUp() {
File[] files = getTempDir().listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
if (file.isDirectory()
&& file.getName().startsWith(TempTools.class.getName())) {
return true;
}
return false;
}
});
if (files == null) {
return;
}
for (int i = 0; i < files.length; i++) {
cleanUpTempDir(files[i]);
}
}
/**
* Clean up a single temporary directory
*
* @param file
*/
protected static void cleanUpTempDir(File file) {
FileTools.Lock tempLock = FileTools.lock(file);
if (tempLock == null) {
return;
}
tempLock.release();
// orphaned directory, try to clean up
FileTools.deleteRecursivly(file);
}
synchronized public static File createTempDir(String prefix, String suffix) {
// resource local to unique VM temp directory
// - don't need to check for name
String tempName = prefix + dirCounter++ + suffix;
File tempFile = new File(TempTools.getTempDirVM(), tempName);
tempFile.mkdirs();
return tempFile;
}
/**
* Create the root directory for all temp files
*
* @param parent
* @return
*/
protected static File createTempDirVM(File parent) {
String name = TempTools.class.getName();
File tempFile = new File(parent, name);
int counter = 0;
while (true) {
tempFile = new File(parent, name + "_" + counter);
if (!tempFile.exists() && tempFile.mkdirs()) {
lock = FileTools.lock(tempFile);
if (lock != null) {
break;
}
}
counter++;
}
return tempFile;
}
synchronized public static File createTempFile(String prefix, String suffix) {
// resource local to unique VM temp directory
String tempName = prefix + suffix;
File tempFile = new File(TempTools.getTempDirVM(), tempName);
if (tempFile.exists()) {
tempName = prefix + fileCounter++ + suffix;
tempFile = new File(TempTools.getTempDirVM(), tempName);
}
return tempFile;
}
public static File getTempDir() {
if (tempDir == null) {
tempDir = new File(System.getProperty("java.io.tmpdir"));
}
return tempDir;
}
public static File getTempDirVM() {
if (tempDirVM == null) {
tempDirVM = createTempDirVM(getTempDir());
}
return tempDirVM;
}
public static void setTempDir(File pTempDir) {
tempDir = pTempDir;
}
}