コード例 #1
0
    /** {@inheritDoc} */
    @Override
    public Integer call() throws Exception {
      GridCacheTx tx = CU.txStartInternal(ctx, latchView, PESSIMISTIC, REPEATABLE_READ);

      try {
        GridCacheCountDownLatchValue latchVal = latchView.get(key);

        if (latchVal == null) {
          if (log.isDebugEnabled())
            log.debug("Failed to find count down latch with given name: " + name);

          assert cnt == 0;

          return cnt;
        }

        int retVal;

        if (val > 0) {
          retVal = latchVal.get() - val;

          if (retVal < 0) retVal = 0;
        } else retVal = 0;

        latchVal.set(retVal);

        latchView.put(key, latchVal);

        tx.commit();

        return retVal;
      } finally {
        tx.end();
      }
    }
コード例 #2
0
  /** {@inheritDoc} */
  @Override
  public boolean compareAndSet(T expVal, T newVal, S expStamp, S newStamp) throws GridException {
    checkRemoved();

    return CU.outTx(
        internalCompareAndSet(
            F0.equalTo(expVal),
            wrapperClosure(newVal),
            F0.equalTo(expStamp),
            wrapperClosure(newStamp)),
        ctx);
  }
コード例 #3
0
  /** @throws GridException If operation failed. */
  private void initializeLatch() throws GridException {
    if (initGuard.compareAndSet(false, true)) {
      try {
        internalLatch =
            CU.outTx(
                new Callable<CountDownLatch>() {
                  @Override
                  public CountDownLatch call() throws Exception {
                    GridCacheTx tx =
                        CU.txStartInternal(ctx, latchView, PESSIMISTIC, REPEATABLE_READ);

                    try {
                      GridCacheCountDownLatchValue val = latchView.get(key);

                      if (val == null) {
                        if (log.isDebugEnabled())
                          log.debug("Failed to find count down latch with given name: " + name);

                        assert cnt == 0;

                        return new CountDownLatch(cnt);
                      }

                      tx.commit();

                      return new CountDownLatch(val.get());
                    } finally {
                      tx.end();
                    }
                  }
                },
                ctx);

        if (log.isDebugEnabled()) log.debug("Initialized internal latch: " + internalLatch);
      } finally {
        initLatch.countDown();
      }
    } else {
      try {
        initLatch.await();
      } catch (InterruptedException ignored) {
        throw new GridException("Thread has been interrupted.");
      }

      if (internalLatch == null)
        throw new GridException("Internal latch has not been properly initialized.");
    }
  }
コード例 #4
0
  /**
   * @param nodeId Sender node ID.
   * @param req Finish transaction message.
   */
  @SuppressWarnings({"CatchGenericClass"})
  private void processFinishRequest(UUID nodeId, GridDistributedTxFinishRequest<K, V> req) {
    assert nodeId != null;
    assert req != null;

    GridReplicatedTxRemote<K, V> tx = ctx.tm().tx(req.version());

    try {
      ClassLoader ldr = ctx.deploy().globalLoader();

      if (req.commit()) {
        // If lock was acquired explicitly.
        if (tx == null) {
          // Create transaction and add entries.
          tx =
              ctx.tm()
                  .onCreated(
                      new GridReplicatedTxRemote<K, V>(
                          ldr,
                          nodeId,
                          req.threadId(),
                          req.version(),
                          req.commitVersion(),
                          PESSIMISTIC,
                          READ_COMMITTED,
                          req.isInvalidate(),
                          /*timeout */ 0,
                          /*read entries*/ null,
                          req.writes(),
                          ctx));

          if (tx == null || !ctx.tm().onStarted(tx))
            throw new GridCacheTxRollbackException(
                "Attempt to start a completed " + "transaction: " + req);
        } else {
          boolean set = tx.commitVersion(req.commitVersion());

          assert set;
        }

        Collection<GridCacheTxEntry<K, V>> writeEntries = req.writes();

        if (!F.isEmpty(writeEntries)) {
          // In OPTIMISTIC mode, we get the values at PREPARE stage.
          assert tx.concurrency() == PESSIMISTIC;

          for (GridCacheTxEntry<K, V> entry : writeEntries) {
            // Unmarshal write entries.
            entry.unmarshal(ctx, ldr);

            if (log.isDebugEnabled())
              log.debug(
                  "Unmarshalled transaction entry from pessimistic transaction [key="
                      + entry.key()
                      + ", value="
                      + entry.value()
                      + ", tx="
                      + tx
                      + ']');

            if (!tx.setWriteValue(entry))
              U.warn(
                  log,
                  "Received entry to commit that was not present in transaction [entry="
                      + entry
                      + ", tx="
                      + tx
                      + ']');
          }
        }

        // Add completed versions.
        tx.doneRemote(req.baseVersion(), req.committedVersions(), req.rolledbackVersions());

        if (tx.pessimistic()) tx.prepare();

        tx.commit();
      } else if (tx != null) {
        tx.doneRemote(req.baseVersion(), req.committedVersions(), req.rolledbackVersions());

        tx.rollback();
      }

      if (req.replyRequired()) {
        GridCacheMessage<K, V> res =
            new GridDistributedTxFinishResponse<K, V>(req.version(), req.futureId());

        try {
          ctx.io().send(nodeId, res);
        } catch (Throwable e) {
          // Double-check.
          if (ctx.discovery().node(nodeId) == null) {
            if (log.isDebugEnabled())
              log.debug(
                  "Node left while sending finish response [nodeId="
                      + nodeId
                      + ", res="
                      + res
                      + ']');
          } else
            U.error(
                log,
                "Failed to send finish response to node [nodeId=" + nodeId + ", res=" + res + ']',
                e);
        }
      }
    } catch (GridCacheTxRollbackException e) {
      if (log.isDebugEnabled())
        log.debug("Attempted to start a completed transaction (will ignore): " + e);
    } catch (Throwable e) {
      U.error(
          log,
          "Failed completing transaction [commit=" + req.commit() + ", tx=" + CU.txString(tx) + ']',
          e);

      if (tx != null) tx.rollback();
    }
  }
コード例 #5
0
  /**
   * Synchronous sequence update operation. Will add given amount to the sequence value.
   *
   * @param l Increment amount.
   * @param updateCall Cache call that will update sequence reservation count in accordance with l.
   * @param updated If {@code true}, will return sequence value after update, otherwise will return
   *     sequence value prior to update.
   * @return Sequence value.
   * @throws GridException If update failed.
   */
  private long internalUpdate(long l, @Nullable Callable<Long> updateCall, boolean updated)
      throws GridException {
    checkRemoved();

    assert l > 0;

    lock.lock();

    try {
      // If reserved range isn't exhausted.
      if (locVal + l <= upBound) {
        long curVal = locVal;

        locVal += l;

        return updated ? locVal : curVal;
      }
    } finally {
      lock.unlock();
    }

    if (updateCall == null) updateCall = internalUpdate(l, updated);

    while (true) {
      if (updateGuard.compareAndSet(false, true)) {
        try {
          // This call must be outside lock.
          return CU.outTx(updateCall, ctx);
        } finally {
          lock.lock();

          try {
            updateGuard.set(false);

            cond.signalAll();
          } finally {
            lock.unlock();
          }
        }
      } else {
        lock.lock();

        try {
          while (locVal >= upBound && updateGuard.get()) {
            try {
              cond.await(500, MILLISECONDS);
            } catch (InterruptedException e) {
              throw new GridInterruptedException(e);
            }
          }

          checkRemoved();

          // If reserved range isn't exhausted.
          if (locVal + l <= upBound) {
            long curVal = locVal;

            locVal += l;

            return updated ? locVal : curVal;
          }
        } finally {
          lock.unlock();
        }
      }
    }
  }
コード例 #6
0
  /** {@inheritDoc} */
  @Override
  public boolean compareAndSet(T expVal, T newVal) throws GridException {
    checkRemoved();

    return CU.outTx(internalCompareAndSet(wrapperPredicate(expVal), wrapperClosure(newVal)), ctx);
  }
コード例 #7
0
  /** {@inheritDoc} */
  @Override
  public void set(T val) throws GridException {
    checkRemoved();

    CU.outTx(internalSet(val), ctx);
  }
コード例 #8
0
  /** {@inheritDoc} */
  @Override
  public T get() throws GridException {
    checkRemoved();

    return CU.outTx(getCall, ctx);
  }
コード例 #9
0
  /** {@inheritDoc} */
  @Override
  public T value() throws GridException {
    checkRemoved();

    return CU.outTx(valCall, ctx);
  }
コード例 #10
0
  /** {@inheritDoc} */
  @Override
  public S stamp() throws GridException {
    checkRemoved();

    return CU.outTx(stampCall, ctx);
  }
コード例 #11
0
 /** {@inheritDoc} */
 @Override
 public void countDownAll() throws GridException {
   CU.outTx(new CountDownCallable(0), ctx);
 }
コード例 #12
0
  /** {@inheritDoc} */
  @Override
  public int countDown(int val) throws GridException {
    A.ensure(val > 0, "val should be positive");

    return CU.outTx(new CountDownCallable(val), ctx);
  }
コード例 #13
0
 /** {@inheritDoc} */
 @Override
 public int countDown() throws GridException {
   return CU.outTx(new CountDownCallable(1), ctx);
 }