/*
* Deletes the file at the location passed. If the location is a
* directory the method will return false.
* Returns true if and only if the file was deleted;
* returns false otherwise
*/
public static boolean deleteFile(File file) {
if (file.isFile()) {
if (file.delete()) {
return true;
}
}
return false;
}
/*
* Deletes the directory at the location passed. If deleteIfFull is true
* then the method gets all the files in the directory and tries to delete
* them. If deleteIfFull is false the method will attempt to delete the
* directory. If the directory contains files, the method will return false.
* Returns true if and only if the directory was deleted;
* returns false otherwise
*/
public static boolean deleteDirectory(File dir, boolean deleteIfFull) {
// Checks if the file exists and if it is actually a directory
if (dir.exists() && dir.isDirectory()) {
// Checks if deleteIfFull is true
if (deleteIfFull) {
// Goes through each file in the directory and attempts to delete them
File[] files = dir.listFiles();
if (files != null) {
for (File f : files) {
f.delete();
}
}
}
// If the directory was deleted successfully then return true
if (dir.delete()) {
return true;
}
}
// Return false otherwise
return false;
}
public static void main(String[] args) throws Exception {
blah = File.createTempFile("blah", null);
blah.deleteOnExit();
initTestFile(blah);
try {
out.println("Test file " + blah + " initialized");
testZero();
out.println("Zero size: OK");
testRead();
out.println("Read: OK");
testWrite();
out.println("Write: OK");
testHighOffset();
out.println("High offset: OK");
testExceptions();
out.println("Exceptions: OK");
} finally {
blah.delete();
}
}
/**
* deletes a given filename
*
* @param fileName
* @return
*/
public static boolean delete(String fileName) {
boolean returnVal = true;
try {
File target = new File(fileName);
if (!target.exists()) {
returnVal = false;
}
if (target.delete()) {
returnVal = true;
} else {
returnVal = false;
}
} catch (SecurityException e) {
returnVal = false;
}
return returnVal;
}
/** @param workTokDir Token directory (common for multiple nodes). */
private void processTokenDirectory(File workTokDir) {
for (File f : workTokDir.listFiles()) {
if (!f.isDirectory()) {
if (!f.getName().equals(LOCK_FILE_NAME)) {
if (log.isDebugEnabled()) log.debug("Unexpected file: " + f.getName());
}
continue;
}
if (f.equals(tokDir)) {
if (log.isDebugEnabled()) log.debug("Skipping own token directory: " + tokDir.getName());
continue;
}
String name = f.getName();
int pid;
try {
pid = Integer.parseInt(name.substring(name.lastIndexOf('-') + 1));
} catch (NumberFormatException ignored) {
if (log.isDebugEnabled()) log.debug("Failed to parse file name: " + name);
continue;
}
// Is process alive?
if (IpcSharedMemoryUtils.alive(pid)) {
if (log.isDebugEnabled()) log.debug("Skipping alive node: " + pid);
continue;
}
if (log.isDebugEnabled()) log.debug("Possibly stale token folder: " + f);
// Process each token under stale token folder.
File[] shmemToks = f.listFiles();
if (shmemToks == null)
// Although this is strange, but is reproducible sometimes on linux.
return;
int rmvCnt = 0;
try {
for (File f0 : shmemToks) {
if (log.isDebugEnabled()) log.debug("Processing token file: " + f0.getName());
if (f0.isDirectory()) {
if (log.isDebugEnabled()) log.debug("Unexpected directory: " + f0.getName());
}
// Token file format: gg-shmem-space-[auto_idx]-[other_party_pid]-[size]
String[] toks = f0.getName().split("-");
if (toks.length != 6) {
if (log.isDebugEnabled()) log.debug("Unrecognized token file: " + f0.getName());
continue;
}
int pid0;
int size;
try {
pid0 = Integer.parseInt(toks[4]);
size = Integer.parseInt(toks[5]);
} catch (NumberFormatException ignored) {
if (log.isDebugEnabled()) log.debug("Failed to parse file name: " + name);
continue;
}
if (IpcSharedMemoryUtils.alive(pid0)) {
if (log.isDebugEnabled()) log.debug("Skipping alive process: " + pid0);
continue;
}
if (log.isDebugEnabled()) log.debug("Possibly stale token file: " + f0);
IpcSharedMemoryUtils.freeSystemResources(f0.getAbsolutePath(), size);
if (f0.delete()) {
if (log.isDebugEnabled()) log.debug("Deleted file: " + f0.getName());
rmvCnt++;
} else if (!f0.exists()) {
if (log.isDebugEnabled())
log.debug("File has been concurrently deleted: " + f0.getName());
rmvCnt++;
} else if (log.isDebugEnabled()) log.debug("Failed to delete file: " + f0.getName());
}
} finally {
// Assuming that no new files can appear, since
if (rmvCnt == shmemToks.length) {
U.delete(f);
if (log.isDebugEnabled()) log.debug("Deleted empty token directory: " + f.getName());
}
}
}
}
