/**
* OpenAtlasForAndroid Project
* The MIT License (MIT) Copyright (OpenAtlasForAndroid) 2015 Bunny Blue,achellies
* <p/>
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software
* without restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to the following conditions:
* <p/>
* The above copyright notice and this permission notice shall be included in all copies
* or substantial portions of the Software.
* <p/>
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @author BunnyBlue
**/
package com.openatlas.util;
import android.os.Process;
import com.openatlas.log.Logger;
import com.openatlas.log.LoggerFactory;
import com.openatlas.runtime.RuntimeVariables;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* OpenAtlasFileLock used for OpenAtlas internal
* @author BunnyBlue
* **/
public class OpenAtlasFileLock {
static final Logger log = LoggerFactory.getInstance("OpenAtlasFileLock");
private static String processName;
private static OpenAtlasFileLock singleton;
private Map<String, FileLockCount> mRefCountMap = new ConcurrentHashMap();
private class FileLockCount {
FileChannel fChannel;
RandomAccessFile fOs;
FileLock mFileLock;
int mRefCount;
FileLockCount(FileLock fileLock, int mRefCount, RandomAccessFile fOs, FileChannel fChannel) {
this.mFileLock = fileLock;
this.mRefCount = mRefCount;
this.fOs = fOs;
this.fChannel = fChannel;
}
}
static {
if (RuntimeVariables.androidApplication.getApplicationContext() != null) {
processName = OpenAtlasUtils.getProcessNameByPID(Process.myPid());
}
}
public static OpenAtlasFileLock getInstance() {
if (singleton == null) {
singleton = new OpenAtlasFileLock();
}
return singleton;
}
private int RefCntInc(String filePath, FileLock fileLock, RandomAccessFile randomAccessFile, FileChannel fileChannel) {
Integer valueOf;
Integer.valueOf(0);
if (this.mRefCountMap.containsKey(filePath)) {
FileLockCount fileLockCount = this.mRefCountMap.get(filePath);
int i = fileLockCount.mRefCount;
fileLockCount.mRefCount = i + 1;
valueOf = Integer.valueOf(i);
} else {
valueOf = Integer.valueOf(1);
this.mRefCountMap.put(filePath, new FileLockCount(fileLock, valueOf.intValue(), randomAccessFile, fileChannel));
}
return valueOf.intValue();
}
private int RefCntDec(String filePath) {
Integer valueOf = Integer.valueOf(0);
if (this.mRefCountMap.containsKey(filePath)) {
FileLockCount fileLockCount = this.mRefCountMap.get(filePath);
int i = fileLockCount.mRefCount - 1;
fileLockCount.mRefCount = i;
valueOf = Integer.valueOf(i);
if (valueOf.intValue() <= 0) {
this.mRefCountMap.remove(filePath);
}
}
return valueOf.intValue();
}
/**
* lock odex
*
* @param bundleDexFile optimize dex file
**/
public boolean LockExclusive(File bundleDexFile) {
if (bundleDexFile == null) {
return false;
}
try {
File lockFile = new File(bundleDexFile.getParentFile().getAbsolutePath().concat("/lock"));
if (!lockFile.exists()) {
lockFile.createNewFile();
}
RandomAccessFile randomAccessFile = new RandomAccessFile(lockFile.getAbsolutePath(), "rw");
FileChannel channel = randomAccessFile.getChannel();
FileLock lock = channel.lock();
if (!lock.isValid()) {
return false;
}
RefCntInc(lockFile.getAbsolutePath(), lock, randomAccessFile, channel);
return true;
} catch (Exception e) {
log.error(processName + " FileLock " + bundleDexFile.getParentFile().getAbsolutePath().concat("/lock") + " Lock FAIL! " + e.getMessage());
return false;
}
}
/**
* unlock odex file
**/
public void unLock(File bundleDexFile) {
File lockFile = new File(bundleDexFile.getParentFile().getAbsolutePath().concat("/lock"));
if (!lockFile.exists()) {
return;
}
if (lockFile == null || this.mRefCountMap.containsKey(lockFile.getAbsolutePath())) {
FileLockCount fileLockCount = this.mRefCountMap.get(lockFile.getAbsolutePath());
if (fileLockCount != null) {
FileLock fileLock = fileLockCount.mFileLock;
RandomAccessFile randomAccessFile = fileLockCount.fOs;
FileChannel fileChannel = fileLockCount.fChannel;
try {
if (RefCntDec(lockFile.getAbsolutePath()) <= 0) {
if (fileLock != null && fileLock.isValid()) {
fileLock.release();
}
if (randomAccessFile != null) {
randomAccessFile.close();
}
if (fileChannel != null) {
fileChannel.close();
}
}
} catch (IOException e) {
log.error(processName + " FileLock " + bundleDexFile.getParentFile().getAbsolutePath().concat("/lock") + " unlock FAIL! " + e.getMessage());
}
}
}
}
}