public synchronized void start() {
if (isRunning) {
return;
}
// report if checkpoint incomplete/invalid
if (getRecoveryCheckpoint() != null) {
File cpDir = getRecoveryCheckpoint().getCheckpointDir().getFile();
if (!Checkpoint.hasValidStamp(cpDir)) {
LOGGER.severe(
"checkpoint '"
+ cpDir.getAbsolutePath()
+ "' missing validity stamp file; checkpoint data "
+ "may be missing or otherwise corrupt.");
}
}
this.isRunning = true;
setupCheckpointTask();
}
/**
* Returns a list of available, valid (contains 'valid' file) checkpoint directories, as File
* instances, with the more recently-written appearing first.
*
* @return List of valid checkpoint directory File instances
*/
@SuppressWarnings("unchecked")
public List<File> findAvailableCheckpointDirectories() {
File[] dirs =
getCheckpointsDir().getFile().listFiles((FileFilter) FileFilterUtils.directoryFileFilter());
if (dirs == null) {
return Collections.EMPTY_LIST;
}
Arrays.sort(dirs, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
LinkedList<File> dirsList = new LinkedList<File>(Arrays.asList(dirs));
Iterator<File> iter = dirsList.iterator();
while (iter.hasNext()) {
File cpDir = iter.next();
if (!Checkpoint.hasValidStamp(cpDir)) {
LOGGER.warning("checkpoint '" + cpDir + "' missing validity stamp file; ignoring");
iter.remove();
}
}
return dirsList;
}