/**
* copy disk.
*
* @param srcFile the source disk
* @return a new disk object
* @throws Exception
*/
public VAFile copyDisk(VAFile srcFile) throws Exception {
// check disk
checkDiskType(srcFile);
// if the file has parent file, it can't be copied
VADisk srcDisk = new VADisk(srcFile);
if (!srcDisk.getParent().equals(VAMConstants.NULL)) {
throw new Exception("Can't copy the disk");
}
// create new VAFile object
VAFile vafile =
createFile(
srcFile.getId(),
null,
VAMConstants.VAF_FILE_TYPE_DISK,
srcFile.getFormat(),
srcFile.getSize());
VADisk vadisk = new VADisk(vafile);
vadisk.setCapacity(srcDisk.getCapacity());
vadisk.setParent(srcFile.getGuid());
vadisk.setReplica(true);
// get file data access object
VAFileDao fileDao = DaoFactory.getVAFileDao();
// add the file to the database
vafile = fileDao.add(vadisk);
if (vafile == null) {
throw new Exception("Can't add the file to the database.");
}
try {
// copy disk
FileOperation.getInstance()
.copyDisk(
VAMConfig.getNfsHost(),
VAMConfig.getNfsUser(),
vafile,
srcFile.getSavePath(),
vafile.getSavePath());
} catch (Exception e) {
// remove file in the database
DaoFactory.getVAFileDao().remove(vafile.getGuid());
throw new Exception(e);
}
return vafile;
}
/**
* create a virtual disk.
*
* @param id disk id
* @param format disk format
* @param capacity disk capacity
* @return file object
* @throws Exception
*/
public VAFile createDisk(VAFile vafile, long capacity) throws Exception {
// check disk
checkDiskType(vafile);
// create a new disk
VADisk vadisk = new VADisk(vafile);
vadisk.setCapacity(capacity);
// get file data access object
VAFileDao fileDao = DaoFactory.getVAFileDao();
// add the file to the database
vafile = fileDao.add(vadisk);
if (vafile == null) {
throw new Exception("Can't add the file to the database.");
}
try {
// create disk
FileOperation.getInstance()
.createDisk(
VAMConfig.getNfsHost(),
VAMConfig.getNfsUser(),
vafile,
vafile.getSavePath(),
capacity);
} catch (Exception e) {
// remove file in the database
DaoFactory.getVAFileDao().remove(vafile.getGuid());
throw new Exception(e);
}
return vafile;
}
/**
* get the capacity and size of the disk.
*
* @param vafile disk object
* @return input disk object with capacity and size
*/
public VADisk getDiskCapacity(VAFile vafile) {
Runtime rt = Runtime.getRuntime();
Process proc;
long capacity = 0;
long size = 0;
// get the disk capacity and size
try {
String command = VAMUtil.getDiskInfoCommand(vafile.getSavePath());
String[] shell = new String[] {"/bin/sh", "-c", command};
proc = rt.exec(shell);
InputStream is = proc.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null) {
if (line.startsWith("virtual size")) {
Pattern pattern = Pattern.compile("(\\d+) bytes");
Matcher matcher = pattern.matcher(line);
if (matcher.find()) {
capacity = Long.parseLong(matcher.group(1));
}
}
}
String path = vafile.getSavePath();
File file = new File(path);
if (file.exists()) {
size = file.length();
}
} catch (IOException e) {
VAMUtil.errorLog(e.getMessage());
}
VADisk vadisk = new VADisk(vafile);
vadisk.setCapacity(capacity);
vadisk.setSize(size);
return vadisk;
}
/**
* create snapshot of a disk.
*
* @param srcFile the parent disk file object
* @param dstFile the snapshot file object
* @param host the name or IP of host creating snapshot
* @param user the user name or IP of host creating snapshot
* @return snapshot file object
* @throws Exception
*/
public VAFile createSnapshot(VAFile srcFile, VAFile dstFile, String host, String user)
throws Exception {
// check file type
checkDiskType(srcFile);
// get file data access object
VAFileDao fileDao = DaoFactory.getVAFileDao();
VADisk instDisk = new VADisk(srcFile);
// create new disk and set parent
VADisk vadisk = new VADisk(dstFile);
vadisk.setCapacity(instDisk.getCapacity());
vadisk.setParent(srcFile.getGuid());
// add the file to the database
dstFile = fileDao.add(vadisk);
if (dstFile == null) {
throw new Exception("Can't add the file to the database.");
}
try {
String path = null;
String backingPath = null;
if (host == null || user == null) {
host = VAMConfig.getNfsHost();
user = VAMConfig.getNfsUser();
}
path = dstFile.getSavePath();
backingPath = srcFile.getSavePath();
// create snapshot
FileOperation.getInstance().createSnapshot(dstFile, host, user, path, backingPath);
} catch (Exception e) {
// remove file in the database
fileDao.remove(dstFile.getGuid());
throw new Exception(e);
}
return dstFile;
}
/**
* convert disk format.
*
* @param vafile file object
* @param srcPath the source disk path
* @param format disk format
* @param deleteSrcFile whether delete the source disk after converting
* @return a new file object
* @throws Exception
*/
public VAFile convertDiskFormat(
VAFile vafile, String srcPath, String format, boolean deleteSrcFile) throws Exception {
// check disk
checkDiskType(vafile);
// check state of the file
if (vafile.getState() != VAMConstants.STATE_READY) {
throw new Exception("The file's state is not correct");
}
// save old information
String oldLocation = vafile.getLocation();
String oldFormat = vafile.getFormat();
// String oldParent = vafile.getParent();
int oldState = vafile.getState();
// set new information
String newLocation = "file." + VAMUtil.genGuid();
vafile.setSrcPath(srcPath);
vafile.setLocation(newLocation);
vafile.setFormat(format);
// vafile.setParent(VAMConstants.NULL);
vafile.setDeletefileAfterOperation(deleteSrcFile);
// get file data access object
VAFileDao fileDao = DaoFactory.getVAFileDao();
fileDao.update(vafile);
try {
// convert disk format
FileOperation.getInstance()
.convertDiskFormat(
VAMConfig.getNfsHost(),
VAMConfig.getNfsUser(),
vafile,
srcPath,
vafile.getSavePath(),
format);
} catch (Exception e) {
// restore the old information
vafile.setLocation(oldLocation);
vafile.setFormat(oldFormat);
vafile.setState(oldState);
// vafile.setParent(oldParent);
DaoFactory.getVAFileDao().update(vafile);
throw new Exception(e);
}
return vafile;
}
/**
* remove file by GUID.
*
* @param guid file GUID
* @return whether remove the file successfully
* @throws Exception
*/
public boolean removeFile(String host, String user, String guid) throws Exception {
// get file data access object
VAFileDao fileDao = DaoFactory.getVAFileDao();
// get the VAFile object with the GUID
VAFile vafile = fileDao.query(guid);
if (vafile == null) {
// if the file is already deleted, should not throw exception
return true;
// throw new Exception("The file with guid \"" + guid
// + "\" is not existed or available");
}
if (vafile.getParent().equals(VAMConstants.NULL)) {
if (fileDao.getActiveReference(vafile.getGuid()) > 0) {
throw new Exception("The file is in used");
}
} else {
if (vafile.getRef() > 0) {
throw new Exception("The file is in used");
}
}
int oldState = vafile.getState();
try {
// remove file
FileOperation.getInstance().removeFile(host, user, vafile, vafile.getSavePath());
} catch (RuntimeException e) {
// restore state
vafile.setState(oldState);
fileDao.update(vafile);
throw new Exception(e);
}
return true;
}
/**
* clear incorrect file.
*
* @param clearFlag the clear flag, which supports VAMConstants.FILE_CLEAR_FLAG_ERROR,
* VAMConstants.FILE_CLEAR_FLAG_NOT_READY, VAMConstants.FILE_CLEAR_FLAG_NOT_FIND_DATA,
* VAMConstants.FILE_CLEAR_FLAG_NOT_FIND_FILE, VAMConstants.FILE_CLEAR_FLAG_NOT_FIND_PARENT,
* it can use or operation,
* @throws Exception
*/
public void clearFile(int clearFlag) throws Exception {
VAFileDao fileDao = DaoFactory.getVAFileDao();
List<VAFile> fileList = getAllFile();
// clear the file whose data can't be found in the database
if ((clearFlag & VAMConstants.FILE_CLEAR_FLAG_NOT_FIND_DATA) != 0) {
Map<String, String> pathMap = new HashMap<String, String>();
for (int i = 0; i < fileList.size(); i++) {
VAFile va = (VAFile) fileList.get(i);
pathMap.put(va.getSavePath(), "ok");
}
File fileDir = new File(VAMConfig.getFileDirLocation());
if (fileDir.exists() && fileDir.isDirectory()) {
checkFile(fileDir, pathMap);
}
}
// clear the file whose physical file can't be found
if ((clearFlag & VAMConstants.FILE_CLEAR_FLAG_NOT_FIND_FILE) != 0) {
File fileDir = new File(VAMConfig.getFileDirLocation());
if (fileDir.exists() && fileDir.isDirectory()) {
for (int i = 0; i < fileList.size(); i++) {
VAFile va = (VAFile) fileList.get(i);
File file = new File(va.getSavePath());
if (!file.exists()) {
fileDao.remove(va.getGuid());
}
}
}
}
// clear the file whose state is error
if ((clearFlag & VAMConstants.FILE_CLEAR_FLAG_ERROR) != 0) {
List<VAObject> errorFiles = fileDao.getErrorFiles();
for (int i = 0; i < errorFiles.size(); i++) {
try {
removeFile(null, null, errorFiles.get(i).getGuid());
} catch (Exception e) {
e.printStackTrace();
}
}
}
// clear the file whose state is not ready
if ((clearFlag & VAMConstants.FILE_CLEAR_FLAG_NOT_READY) != 0) {
List<VAObject> notReadyFiles = fileDao.getNotReadyFiles();
for (int i = 0; i < notReadyFiles.size(); i++) {
VAFile va = new VAFile(notReadyFiles.get(i));
if (VAMUtil.getTimestamp() - va.getTimestamp() > VAMConstants.HOUR / 2) {
removeFile(null, null, va.getGuid());
}
}
}
// clear the file whose parent can't be found
if ((clearFlag & VAMConstants.FILE_CLEAR_FLAG_NOT_FIND_PARENT) != 0) {
fileList = getAllFile();
Map<String, String> guidMap = new HashMap<String, String>();
for (int i = 0; i < fileList.size(); i++) {
VAFile va = (VAFile) fileList.get(i);
guidMap.put(va.getGuid(), "ok");
}
for (int i = 0; i < fileList.size(); i++) {
VAFile va = (VAFile) fileList.get(i);
if (!va.getParent().equals(VAMConstants.NULL)
&& guidMap.get(va.getParent()) == null
&& va.getRef() == 0) {
removeFile(null, null, va.getGuid());
}
}
}
}
/**
* add file.
*
* @param vafile file object
* @param storeLoc the file location
* @param deleteSrcFile whether delete the source file after add file
* @return file object
* @throws Exception
*/
public VAFile addFile(VAFile vafile, String storeLoc, boolean deleteSrcFile) throws Exception {
// check whether the store file is existed
String storePath = storeLoc;
if (storePath != null) {
File storeFile = new File(storePath);
if (!storeFile.exists()) {
throw new Exception("The file \"" + storePath + "\" is not existed!");
}
vafile.setSize(storeFile.length());
}
// check file path
VAMUtil.checkFile(null, vafile.getLocation());
// get file data access object
VAFileDao fileDao = DaoFactory.getVAFileDao();
// add the file to the database
vafile = fileDao.add(vafile);
if (vafile == null) {
throw new Exception("Can't add the file to the database.");
}
try {
// if the file type is disk, convert disk format
if (vafile.getFileType().equals(VAMConstants.VAF_FILE_TYPE_DISK)) {
vafile.setSrcPath(storeLoc);
DiskInfo info = VAMUtil.getDiskInfo(storeLoc);
String format = null;
String backingFile = null;
if (info != null) {
format = info.getFormat();
backingFile = info.getBackingFile();
}
if (format != null
&& format.equalsIgnoreCase(VAMConfig.getImageFormat())
&& backingFile == null) {
VADisk disk = new VADisk(vafile);
disk.setCapacity(info.getVirtualSize());
disk.setSize(info.getDiskSize());
FileOperation.getInstance()
.moveFile(
VAMConfig.getNfsHost(),
VAMConfig.getNfsUser(),
disk,
storeLoc,
disk.getSavePath());
} else {
convertDiskFormat(vafile, storeLoc, VAMConfig.getImageFormat(), deleteSrcFile);
}
} else if (storeLoc != null) { // move file
FileOperation.getInstance()
.moveFile(
VAMConfig.getNfsHost(),
VAMConfig.getNfsUser(),
vafile,
storeLoc,
vafile.getSavePath());
}
} catch (Exception e) {
// remove the file in the database
DaoFactory.getVAFileDao().remove(vafile.getGuid());
throw new Exception(e);
}
return vafile;
}