@Override
public PListImpl getPList(final String name) throws Exception {
if (!isStarted()) {
throw new IllegalStateException("Not started");
}
intialize();
synchronized (indexLock) {
synchronized (this) {
PListImpl result = this.persistentLists.get(name);
if (result == null) {
final PListImpl pl = new PListImpl(this);
pl.setName(name);
getPageFile()
.tx()
.execute(
new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
pl.setHeadPageId(tx.allocate().getPageId());
pl.load(tx);
metaData.lists.put(tx, name, pl);
}
});
result = pl;
this.persistentLists.put(name, pl);
}
final PListImpl toLoad = result;
getPageFile()
.tx()
.execute(
new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
toLoad.load(tx);
}
});
return result;
}
}
}
public void run() {
try {
if (isStopping()) {
return;
}
final int lastJournalFileId = journal.getLastAppendLocation().getDataFileId();
final Set<Integer> candidates = journal.getFileMap().keySet();
LOG.trace("Full gc candidate set:" + candidates);
if (candidates.size() > 1) {
// prune current write
for (Iterator<Integer> iterator = candidates.iterator(); iterator.hasNext(); ) {
if (iterator.next() >= lastJournalFileId) {
iterator.remove();
}
}
List<PListImpl> plists = null;
synchronized (indexLock) {
synchronized (this) {
plists = new ArrayList<PListImpl>(persistentLists.values());
}
}
for (PListImpl list : plists) {
list.claimFileLocations(candidates);
if (isStopping()) {
return;
}
LOG.trace(
"Remaining gc candidate set after refs from: " + list.getName() + ":" + candidates);
}
LOG.trace("GC Candidate set:" + candidates);
this.journal.removeDataFiles(candidates);
}
} catch (IOException e) {
LOG.error("Exception on periodic cleanup: " + e, e);
}
}
@Override
protected synchronized void doStop(ServiceStopper stopper) throws Exception {
if (scheduler != null) {
if (PListStoreImpl.class.getSimpleName().equals(scheduler.getName())) {
scheduler.stop();
scheduler = null;
}
}
for (PListImpl pl : this.persistentLists.values()) {
pl.unload(null);
}
if (this.pageFile != null) {
this.pageFile.unload();
}
if (this.journal != null) {
journal.close();
}
if (this.lockFile != null) {
this.lockFile.unlock();
}
this.lockFile = null;
this.initialized = false;
LOG.info(this + " stopped");
}
public void writePayload(PListImpl list, DataOutput dataOut) throws IOException {
list.write(dataOut);
}
public PListImpl readPayload(DataInput dataIn) throws IOException {
PListImpl result = new PListImpl(this.store);
result.read(dataIn);
return result;
}
