示例#1
0
  /**
   * Basically, future mapping consists from two parts. First, we must determine the topology
   * version this future will map on. Locking is performed within a user transaction, we must
   * continue to map keys on the same topology version as it started. If topology version is
   * undefined, we get current topology future and wait until it completes so the topology is ready
   * to use.
   *
   * <p>During the second part we map keys to primary nodes using topology snapshot we obtained
   * during the first part. Note that if primary node leaves grid, the future will fail and
   * transaction will be rolled back.
   */
  void map() {
    // Obtain the topology version to use.
    GridDiscoveryTopologySnapshot snapshot =
        tx != null
            ? tx.topologySnapshot()
            : cctx.mvcc().lastExplicitLockTopologySnapshot(Thread.currentThread().getId());

    if (snapshot != null) {
      // Continue mapping on the same topology version as it was before.
      topSnapshot.compareAndSet(null, snapshot);

      map(keys);

      markInitialized();

      return;
    }

    // Must get topology snapshot and map on that version.
    mapOnTopology();
  }
示例#2
0
  /**
   * @param cctx Registry.
   * @param keys Keys to lock.
   * @param tx Transaction.
   * @param read Read flag.
   * @param retval Flag to return value or not.
   * @param timeout Lock acquisition timeout.
   * @param filter Filter.
   */
  public GridNearLockFuture(
      GridCacheContext<K, V> cctx,
      Collection<? extends K> keys,
      @Nullable GridNearTxLocal<K, V> tx,
      boolean read,
      boolean retval,
      long timeout,
      GridPredicate<GridCacheEntry<K, V>>[] filter) {
    super(cctx.kernalContext(), CU.boolReducer());
    assert cctx != null;
    assert keys != null;

    this.cctx = cctx;
    this.keys = keys;
    this.tx = tx;
    this.read = read;
    this.retval = retval;
    this.timeout = timeout;
    this.filter = filter;

    threadId = tx == null ? Thread.currentThread().getId() : tx.threadId();

    lockVer = tx != null ? tx.xidVersion() : cctx.versions().next();

    futId = GridUuid.randomUuid();

    entries = new ArrayList<>(keys.size());

    log = U.logger(ctx, logRef, GridNearLockFuture.class);

    if (timeout > 0) {
      timeoutObj = new LockTimeoutObject();

      cctx.time().addTimeoutObject(timeoutObj);
    }

    valMap = new ConcurrentHashMap8<>(keys.size(), 1f);
  }
  /** {@inheritDoc} */
  @Override
  public void unlockAll(
      Collection<? extends K> keys, GridPredicate<? super GridCacheEntry<K, V>>[] filter) {
    if (keys.isEmpty()) return;

    try {
      GridCacheVersion ver = null;

      Collection<GridRichNode> affNodes = null;

      int keyCnt = -1;

      Map<GridRichNode, GridNearUnlockRequest<K, V>> map = null;

      Collection<K> locKeys = new LinkedList<K>();

      GridCacheVersion obsoleteVer = ctx.versions().next();

      for (K key : keys) {
        while (true) {
          GridDistributedCacheEntry<K, V> entry = peekExx(key);

          if (entry == null || !ctx.isAll(entry.wrap(false), filter)) break; // While.

          try {
            GridCacheMvccCandidate<K> cand =
                entry.candidate(ctx.nodeId(), Thread.currentThread().getId());

            if (cand != null) {
              ver = cand.version();

              if (affNodes == null) {
                affNodes = CU.allNodes(ctx, cand.topologyVersion());

                keyCnt = (int) Math.ceil((double) keys.size() / affNodes.size());

                map = new HashMap<GridRichNode, GridNearUnlockRequest<K, V>>(affNodes.size());
              }

              // Send request to remove from remote nodes.
              GridRichNode primary = CU.primary0(ctx.affinity(key, affNodes));

              GridNearUnlockRequest<K, V> req = map.get(primary);

              if (req == null) {
                map.put(primary, req = new GridNearUnlockRequest<K, V>(keyCnt));

                req.version(ver);
              }

              // Remove candidate from local node first.
              GridCacheMvccCandidate<K> rmv = entry.removeLock();

              if (rmv != null) {
                if (!rmv.reentry()) {
                  if (ver != null && !ver.equals(rmv.version()))
                    throw new GridException(
                        "Failed to unlock (if keys were locked separately, "
                            + "then they need to be unlocked separately): "
                            + keys);

                  if (!primary.isLocal()) {
                    assert req != null;

                    req.addKey(entry.key(), entry.getOrMarshalKeyBytes(), ctx);
                  } else locKeys.add(key);

                  if (log.isDebugEnabled()) log.debug("Removed lock (will distribute): " + rmv);
                } else if (log.isDebugEnabled())
                  log.debug(
                      "Current thread still owns lock (or there are no other nodes)"
                          + " [lock="
                          + rmv
                          + ", curThreadId="
                          + Thread.currentThread().getId()
                          + ']');
              }

              // Try to evict near entry if it's dht-mapped locally.
              evictNearEntry(entry, obsoleteVer);
            }

            break;
          } catch (GridCacheEntryRemovedException ignore) {
            if (log.isDebugEnabled())
              log.debug("Attempted to unlock removed entry (will retry): " + entry);
          }
        }
      }

      if (ver == null) return;

      for (Map.Entry<GridRichNode, GridNearUnlockRequest<K, V>> mapping : map.entrySet()) {
        GridRichNode n = mapping.getKey();

        GridDistributedUnlockRequest<K, V> req = mapping.getValue();

        if (n.isLocal()) dht.removeLocks(ctx.nodeId(), req.version(), locKeys, true);
        else if (!req.keyBytes().isEmpty())
          // We don't wait for reply to this message.
          ctx.io().send(n, req);
      }
    } catch (GridException ex) {
      U.error(log, "Failed to unlock the lock for keys: " + keys, ex);
    }
  }