Example #1
0
  /**
   * @param key Key to lock.
   * @return Sync object that should be passed to {@link #unlock(Object, Object)} method.
   */
  public <T> Object lock(T key) {
    assert key != null;

    boolean interrupted = false;

    Sync t = new Sync();

    try {
      while (true) {
        Sync old = locks.putIfAbsent(key, t);

        if (old != null) {
          while (true) {
            try {
              old.await();

              break;
            } catch (InterruptedException ignored) {
              interrupted = true;
            }
          }
        } else return t;
      }
    } finally {
      if (interrupted) Thread.currentThread().interrupt();
    }
  }
  /**
   * @param cancel {@code True} to close with cancellation.
   * @throws GridException If failed.
   */
  @Override
  public void close(boolean cancel) throws GridException {
    if (!closed.compareAndSet(false, true)) return;

    busyLock.block();

    if (log.isDebugEnabled())
      log.debug("Closing data loader [ldr=" + this + ", cancel=" + cancel + ']');

    GridException e = null;

    try {
      // Assuming that no methods are called on this loader after this method is called.
      if (cancel) {
        cancelled = true;

        for (Buffer buf : bufMappings.values()) buf.cancelAll();
      } else doFlush();

      ctx.event().removeLocalEventListener(discoLsnr);

      ctx.io().removeMessageListener(topic);
    } catch (GridException e0) {
      e = e0;
    }

    fut.onDone(null, e);

    if (e != null) throw e;
  }
Example #3
0
  /**
   * @param key Key to lock.
   * @return Sync object that should be passed to {@link #unlock(Object, Object)} method or {@code
   *     null} if try lock failed.
   */
  @Nullable
  public <T> Object tryLock(T key) {
    assert key != null;

    Sync t = new Sync();

    Sync old = locks.putIfAbsent(key, t);

    return old != null ? null : t;
  }
  /**
   * Flushes every internal buffer if buffer was flushed before passed in threshold.
   *
   * <p>Does not wait for result and does not fail on errors assuming that this method should be
   * called periodically.
   */
  @Override
  public void tryFlush() throws GridInterruptedException {
    if (!busyLock.enterBusy()) return;

    try {
      for (Buffer buf : bufMappings.values()) buf.flush();

      lastFlushTime = U.currentTimeMillis();
    } finally {
      leaveBusy();
    }
  }
Example #5
0
  /**
   * @param key Key to lock.
   * @return Sync object that should be passed to {@link #unlock(Object, Object)} method.
   * @throws InterruptedException If interrupted while acquiring lock.
   */
  public <T> Object lockInterruptibly(T key) throws InterruptedException {
    assert key != null;

    Sync t = new Sync();

    while (true) {
      Sync old = locks.putIfAbsent(key, t);

      if (old != null) old.await();
      else return t;
    }
  }
  /**
   * Performs flush.
   *
   * @throws GridException If failed.
   */
  private void doFlush() throws GridException {
    lastFlushTime = U.currentTimeMillis();

    List<GridFuture> activeFuts0 = null;

    int doneCnt = 0;

    for (GridFuture<?> f : activeFuts) {
      if (!f.isDone()) {
        if (activeFuts0 == null) activeFuts0 = new ArrayList<>((int) (activeFuts.size() * 1.2));

        activeFuts0.add(f);
      } else {
        f.get();

        doneCnt++;
      }
    }

    if (activeFuts0 == null || activeFuts0.isEmpty()) return;

    while (true) {
      Queue<GridFuture<?>> q = null;

      for (Buffer buf : bufMappings.values()) {
        GridFuture<?> flushFut = buf.flush();

        if (flushFut != null) {
          if (q == null) q = new ArrayDeque<>(bufMappings.size() * 2);

          q.add(flushFut);
        }
      }

      if (q != null) {
        assert !q.isEmpty();

        boolean err = false;

        for (GridFuture fut = q.poll(); fut != null; fut = q.poll()) {
          try {
            fut.get();
          } catch (GridException e) {
            if (log.isDebugEnabled()) log.debug("Failed to flush buffer: " + e);

            err = true;
          }
        }

        if (err)
          // Remaps needed - flush buffers.
          continue;
      }

      doneCnt = 0;

      for (int i = 0; i < activeFuts0.size(); i++) {
        GridFuture f = activeFuts0.get(i);

        if (f == null) doneCnt++;
        else if (f.isDone()) {
          f.get();

          doneCnt++;

          activeFuts0.set(i, null);
        } else break;
      }

      if (doneCnt == activeFuts0.size()) return;
    }
  }
  /**
   * @param entries Entries.
   * @param resFut Result future.
   * @param activeKeys Active keys.
   * @param remaps Remaps count.
   */
  private void load0(
      Collection<? extends Map.Entry<K, V>> entries,
      final GridFutureAdapter<Object> resFut,
      final Collection<K> activeKeys,
      final int remaps) {
    assert entries != null;

    if (remaps >= MAX_REMAP_CNT) {
      resFut.onDone(new GridException("Failed to finish operation (too many remaps): " + remaps));

      return;
    }

    Map<GridNode, Collection<Map.Entry<K, V>>> mappings = new HashMap<>();

    boolean initPda = ctx.deploy().enabled() && jobPda == null;

    for (Map.Entry<K, V> entry : entries) {
      GridNode node;

      try {
        K key = entry.getKey();

        assert key != null;

        if (initPda) {
          jobPda = new DataLoaderPda(key, entry.getValue(), updater);

          initPda = false;
        }

        node = ctx.affinity().mapKeyToNode(cacheName, key);
      } catch (GridException e) {
        resFut.onDone(e);

        return;
      }

      if (node == null) {
        resFut.onDone(
            new GridTopologyException(
                "Failed to map key to node "
                    + "(no nodes with cache found in topology) [infos="
                    + entries.size()
                    + ", cacheName="
                    + cacheName
                    + ']'));

        return;
      }

      Collection<Map.Entry<K, V>> col = mappings.get(node);

      if (col == null) mappings.put(node, col = new ArrayList<>());

      col.add(entry);
    }

    for (final Map.Entry<GridNode, Collection<Map.Entry<K, V>>> e : mappings.entrySet()) {
      final UUID nodeId = e.getKey().id();

      Buffer buf = bufMappings.get(nodeId);

      if (buf == null) {
        Buffer old = bufMappings.putIfAbsent(nodeId, buf = new Buffer(e.getKey()));

        if (old != null) buf = old;
      }

      final Collection<Map.Entry<K, V>> entriesForNode = e.getValue();

      GridInClosure<GridFuture<?>> lsnr =
          new GridInClosure<GridFuture<?>>() {
            @Override
            public void apply(GridFuture<?> t) {
              try {
                t.get();

                for (Map.Entry<K, V> e : entriesForNode) activeKeys.remove(e.getKey());

                if (activeKeys.isEmpty()) resFut.onDone();
              } catch (GridException e1) {
                if (log.isDebugEnabled())
                  log.debug("Future finished with error [nodeId=" + nodeId + ", err=" + e1 + ']');

                if (cancelled) {
                  resFut.onDone(
                      new GridException(
                          "Data loader has been cancelled: " + GridDataLoaderImpl.this, e1));
                } else load0(entriesForNode, resFut, activeKeys, remaps + 1);
              }
            }
          };

      GridFutureAdapter<?> f;

      try {
        f = buf.update(entriesForNode, lsnr);
      } catch (GridInterruptedException e1) {
        resFut.onDone(e1);

        return;
      }

      if (ctx.discovery().node(nodeId) == null) {
        if (bufMappings.remove(nodeId, buf)) buf.onNodeLeft();

        if (f != null)
          f.onDone(
              new GridTopologyException(
                  "Failed to wait for request completion " + "(node has left): " + nodeId));
      }
    }
  }
Example #8
0
 /** {@inheritDoc} */
 @Override
 public String toString() {
   return S.toString(GridKeyLock.class, this, "locksSize", locks.size());
 }
Example #9
0
  /**
   * @param key Key.
   * @param sync Sync that got from {@link #lockInterruptibly(Object)} call.
   */
  public <T> void unlock(T key, Object sync) {
    if (!locks.remove(key, sync))
      throw new IllegalStateException("Lock has not been acquired for key: " + key);

    ((Sync) sync).finish();
  }