예제 #1
0
  @Override
  public void process(
      KeyFilter<? super K> filter,
      final CacheLoaderTask<K, V> task,
      Executor executor,
      final boolean fetchValue,
      final boolean fetchMetadata) {
    filter = PersistenceUtil.notNull(filter);
    ArrayList<KeyValuePair<K, FileEntry>> keysToLoad = new ArrayList<>(entries.size());
    synchronized (entries) {
      for (Map.Entry<K, FileEntry> e : entries.entrySet()) {
        if (filter.accept(e.getKey())) keysToLoad.add(new KeyValuePair<>(e.getKey(), e.getValue()));
      }
      Collections.sort(
          keysToLoad,
          new Comparator<KeyValuePair<K, FileEntry>>() {
            @Override
            public int compare(KeyValuePair<K, FileEntry> o1, KeyValuePair<K, FileEntry> o2) {
              long offset1 = o1.getValue().offset;
              long offset2 = o2.getValue().offset;
              return offset1 < offset2 ? -1 : offset1 == offset2 ? 0 : 1;
            }
          });
      // keysToLoad values (i.e. FileEntries) must not be used past this point
    }

    ExecutorAllCompletionService eacs = new ExecutorAllCompletionService(executor);

    final TaskContextImpl taskContext = new TaskContextImpl();
    for (KeyValuePair<K, FileEntry> e : keysToLoad) {
      if (taskContext.isStopped()) break;

      final K key = e.getKey();
      eacs.submit(
          new Callable<Void>() {
            @Override
            public Void call() throws Exception {
              try {
                final MarshalledEntry marshalledEntry = _load(key, fetchValue, fetchMetadata);
                if (marshalledEntry != null) {
                  task.processEntry(marshalledEntry, taskContext);
                }
                return null;
              } catch (Exception e) {
                log.errorExecutingParallelStoreTask(e);
                throw e;
              }
            }
          });
    }
    eacs.waitUntilAllCompleted();
    if (eacs.isExceptionThrown()) {
      throw new PersistenceException("Execution exception!", eacs.getFirstException());
    }
  }
예제 #2
0
  @Override
  public void purge(Executor threadPool, final PurgeListener task) {
    long now = timeService.wallClockTime();
    List<KeyValuePair<Object, FileEntry>> entriesToPurge =
        new ArrayList<KeyValuePair<Object, FileEntry>>();
    synchronized (entries) {
      for (Iterator<Map.Entry<K, FileEntry>> it = entries.entrySet().iterator(); it.hasNext(); ) {
        Map.Entry<K, FileEntry> next = it.next();
        FileEntry fe = next.getValue();
        if (fe.isExpired(now)) {
          it.remove();
          entriesToPurge.add(new KeyValuePair<Object, FileEntry>(next.getKey(), fe));
        }
      }
    }

    resizeLock.readLock().lock();
    try {
      for (Iterator<KeyValuePair<Object, FileEntry>> it = entriesToPurge.iterator();
          it.hasNext(); ) {
        KeyValuePair<Object, FileEntry> next = it.next();
        FileEntry fe = next.getValue();
        if (fe.isExpired(now)) {
          it.remove();
          try {
            free(fe);
          } catch (Exception e) {
            throw new PersistenceException(e);
          }
          if (task != null) task.entryPurged(next.getKey());
        }
      }

      // Disk space optimizations
      synchronized (freeList) {
        processFreeEntries();
      }
    } finally {
      resizeLock.readLock().unlock();
    }
  }