/** {@inheritDoc} */
  @Override
  public void explicitUndeploy(UUID nodeId, String rsrcName) {
    Collection<SharedDeployment> undeployed = new LinkedList<SharedDeployment>();

    synchronized (mux) {
      for (Iterator<List<SharedDeployment>> i1 = cache.values().iterator(); i1.hasNext(); ) {
        List<SharedDeployment> deps = i1.next();

        for (Iterator<SharedDeployment> i2 = deps.iterator(); i2.hasNext(); ) {
          SharedDeployment dep = i2.next();

          if (dep.hasName(rsrcName)) {
            if (!dep.isUndeployed()) {
              dep.undeploy();

              dep.onRemoved();

              // Undeploy.
              i2.remove();

              undeployed.add(dep);

              if (log.isInfoEnabled()) log.info("Undeployed per-version class loader: " + dep);
            }

            break;
          }
        }

        if (deps.isEmpty()) i1.remove();
      }
    }

    recordUndeployed(null, undeployed);
  }
  /** {@inheritDoc} */
  @Override
  public void loadCache(GridBiInClosure<K, V> c, @Nullable Object... args) throws GridException {
    ExecutorService exec =
        new ThreadPoolExecutor(
            threadsCnt,
            threadsCnt,
            0L,
            MILLISECONDS,
            new ArrayBlockingQueue<Runnable>(batchQueueSize),
            new BlockingRejectedExecutionHandler());

    Iterator<I> iter = inputIterator(args);

    Collection<I> buf = new ArrayList<>(batchSize);

    try {
      while (iter.hasNext()) {
        if (Thread.currentThread().isInterrupted()) {
          U.warn(log, "Working thread was interrupted while loading data.");

          break;
        }

        buf.add(iter.next());

        if (buf.size() == batchSize) {
          exec.submit(new Worker(c, buf, args));

          buf = new ArrayList<>(batchSize);
        }
      }

      if (!buf.isEmpty()) exec.submit(new Worker(c, buf, args));
    } catch (RejectedExecutionException ignored) {
      // Because of custom RejectedExecutionHandler.
      assert false : "RejectedExecutionException was thrown while it shouldn't.";
    } finally {
      exec.shutdown();

      try {
        exec.awaitTermination(Long.MAX_VALUE, MILLISECONDS);
      } catch (InterruptedException ignored) {
        U.warn(log, "Working thread was interrupted while waiting for put operations to complete.");

        Thread.currentThread().interrupt();
      }
    }
  }
    /** {@inheritDoc} */
    @Override
    public Class<?> deployClass() {
      if (cls == null) {
        Class<?> cls0 = null;

        if (depCls != null) cls0 = depCls;
        else {
          for (Iterator<Object> it = objs.iterator();
              (cls0 == null || U.isJdk(cls0)) && it.hasNext(); ) {
            Object o = it.next();

            if (o != null) cls0 = U.detectClass(o);
          }

          if (cls0 == null || U.isJdk(cls0)) cls0 = GridDataLoaderImpl.class;
        }

        assert cls0 != null : "Failed to detect deploy class [objs=" + objs + ']';

        cls = cls0;
      }

      return cls;
    }
  /**
   * Creates REST request.
   *
   * @param cmd Command.
   * @param params Parameters.
   * @return REST request.
   * @throws GridException If creation failed.
   */
  @Nullable
  private GridRestRequest createRequest(
      GridRestCommand cmd, Map<String, Object> params, ServletRequest req) throws GridException {
    GridRestRequest restReq;

    switch (cmd) {
      case CACHE_GET:
      case CACHE_GET_ALL:
      case CACHE_PUT:
      case CACHE_PUT_ALL:
      case CACHE_REMOVE:
      case CACHE_REMOVE_ALL:
      case CACHE_ADD:
      case CACHE_CAS:
      case CACHE_METRICS:
      case CACHE_REPLACE:
      case CACHE_DECREMENT:
      case CACHE_INCREMENT:
      case CACHE_APPEND:
      case CACHE_PREPEND:
        {
          GridRestCacheRequest restReq0 = new GridRestCacheRequest();

          restReq0.cacheName((String) params.get("cacheName"));
          restReq0.key(params.get("key"));
          restReq0.value(params.get("val"));
          restReq0.value2(params.get("val2"));

          Object val1 = params.get("val1");

          if (val1 != null) restReq0.value(val1);

          restReq0.cacheFlags(intValue("cacheFlags", params, 0));
          restReq0.ttl(longValue("exp", params, null));
          restReq0.initial(longValue("init", params, null));
          restReq0.delta(longValue("delta", params, null));

          if (cmd == CACHE_GET_ALL || cmd == CACHE_PUT_ALL || cmd == CACHE_REMOVE_ALL) {
            List<Object> keys = values("k", params);
            List<Object> vals = values("v", params);

            if (keys.size() < vals.size())
              throw new GridException(
                  "Number of keys must be greater or equals to number of values.");

            Map<Object, Object> map = U.newHashMap(keys.size());

            Iterator<Object> keyIt = keys.iterator();
            Iterator<Object> valIt = vals.iterator();

            while (keyIt.hasNext()) map.put(keyIt.next(), valIt.hasNext() ? valIt.next() : null);

            restReq0.values(map);
          }

          restReq = restReq0;

          break;
        }

      case TOPOLOGY:
      case NODE:
        {
          GridRestTopologyRequest restReq0 = new GridRestTopologyRequest();

          restReq0.includeMetrics(Boolean.parseBoolean((String) params.get("mtr")));
          restReq0.includeAttributes(Boolean.parseBoolean((String) params.get("attr")));

          restReq0.nodeIp((String) params.get("ip"));

          restReq0.nodeId(uuidValue("id", params));

          restReq = restReq0;

          break;
        }

      case EXE:
      case RESULT:
      case NOOP:
        {
          GridRestTaskRequest restReq0 = new GridRestTaskRequest();

          restReq0.taskId((String) params.get("id"));
          restReq0.taskName((String) params.get("name"));

          restReq0.params(values("p", params));

          restReq0.async(Boolean.parseBoolean((String) params.get("async")));

          restReq0.timeout(longValue("timeout", params, 0L));

          restReq = restReq0;

          break;
        }

      case LOG:
        {
          GridRestLogRequest restReq0 = new GridRestLogRequest();

          restReq0.path((String) params.get("path"));

          restReq0.from(intValue("from", params, -1));
          restReq0.to(intValue("to", params, -1));

          restReq = restReq0;

          break;
        }

      case VERSION:
        {
          restReq = new GridRestRequest();

          break;
        }

      default:
        throw new GridException("Invalid command: " + cmd);
    }

    restReq.address(new InetSocketAddress(req.getRemoteAddr(), req.getRemotePort()));

    restReq.command(cmd);

    if (params.containsKey("gridgain.login") || params.containsKey("gridgain.password")) {
      GridSecurityCredentials cred =
          new GridSecurityCredentials(
              (String) params.get("gridgain.login"), (String) params.get("gridgain.password"));

      restReq.credentials(cred);
    }

    String clientId = (String) params.get("clientId");

    try {
      if (clientId != null) restReq.clientId(UUID.fromString(clientId));
    } catch (Exception ignored) {
      // Ignore invalid client id. Rest handler will process this logic.
    }

    String destId = (String) params.get("destId");

    try {
      if (destId != null) restReq.destinationId(UUID.fromString(destId));
    } catch (IllegalArgumentException ignored) {
      // Don't fail - try to execute locally.
    }

    String sesTokStr = (String) params.get("sessionToken");

    try {
      if (sesTokStr != null) restReq.sessionToken(U.hexString2ByteArray(sesTokStr));
    } catch (IllegalArgumentException ignored) {
      // Ignore invalid session token.
    }

    return restReq;
  }
  /** @throws Exception If failed. */
  public void testEmptyProjections() throws Exception {
    final GridClientCompute dflt = client.compute();

    Collection<? extends GridClientNode> nodes = dflt.nodes();

    assertEquals(NODES_CNT, nodes.size());

    Iterator<? extends GridClientNode> iter = nodes.iterator();

    final GridClientCompute singleNodePrj = dflt.projection(Collections.singletonList(iter.next()));

    final GridClientNode second = iter.next();

    final GridClientPredicate<GridClientNode> noneFilter =
        new GridClientPredicate<GridClientNode>() {
          @Override
          public boolean apply(GridClientNode node) {
            return false;
          }
        };

    final GridClientPredicate<GridClientNode> targetFilter =
        new GridClientPredicate<GridClientNode>() {
          @Override
          public boolean apply(GridClientNode node) {
            return node.nodeId().equals(second.nodeId());
          }
        };

    GridTestUtils.assertThrows(
        log(),
        new Callable<Object>() {
          @Override
          public Object call() throws Exception {
            return dflt.projection(noneFilter).log(-1, -1);
          }
        },
        GridServerUnreachableException.class,
        null);

    GridTestUtils.assertThrows(
        log(),
        new Callable<Object>() {
          @Override
          public Object call() throws Exception {
            return singleNodePrj.projection(second);
          }
        },
        GridClientException.class,
        null);

    GridTestUtils.assertThrows(
        log(),
        new Callable<Object>() {
          @Override
          public Object call() throws Exception {
            return singleNodePrj.projection(targetFilter);
          }
        },
        GridClientException.class,
        null);
  }
  /** {@inheritDoc} */
  @Override
  public void onKernalStart() throws GridException {
    discoLsnr =
        new GridLocalEventListener() {
          @Override
          public void onEvent(GridEvent evt) {
            assert evt instanceof GridDiscoveryEvent;

            assert evt.type() == EVT_NODE_LEFT || evt.type() == EVT_NODE_FAILED;

            GridDiscoveryEvent discoEvt = (GridDiscoveryEvent) evt;

            Collection<SharedDeployment> undeployed = new LinkedList<SharedDeployment>();

            if (log.isDebugEnabled()) log.debug("Processing node departure event: " + evt);

            synchronized (mux) {
              for (Iterator<List<SharedDeployment>> i1 = cache.values().iterator();
                  i1.hasNext(); ) {
                List<SharedDeployment> deps = i1.next();

                for (Iterator<SharedDeployment> i2 = deps.iterator(); i2.hasNext(); ) {
                  SharedDeployment dep = i2.next();

                  dep.removeParticipant(discoEvt.eventNodeId());

                  if (!dep.hasParticipants()) {
                    if (dep.deployMode() == SHARED) {
                      if (!dep.isUndeployed()) {
                        dep.undeploy();

                        // Undeploy.
                        i2.remove();

                        assert !dep.isRemoved();

                        dep.onRemoved();

                        undeployed.add(dep);

                        if (log.isDebugEnabled())
                          log.debug(
                              "Undeployed class loader as there are no participating "
                                  + "nodes: "
                                  + dep);
                      }
                    } else if (log.isDebugEnabled())
                      log.debug("Preserving deployment without node participants: " + dep);
                  } else if (log.isDebugEnabled())
                    log.debug("Keeping deployment as it still has participants: " + dep);
                }

                if (deps.isEmpty()) i1.remove();
              }
            }

            recordUndeployed(discoEvt.eventNodeId(), undeployed);
          }
        };

    ctx.event().addLocalEventListener(discoLsnr, EVT_NODE_FAILED, EVT_NODE_LEFT);

    Collection<SharedDeployment> undeployed = new LinkedList<SharedDeployment>();

    synchronized (mux) {
      for (Iterator<List<SharedDeployment>> i1 = cache.values().iterator(); i1.hasNext(); ) {
        List<SharedDeployment> deps = i1.next();

        for (Iterator<SharedDeployment> i2 = deps.iterator(); i2.hasNext(); ) {
          SharedDeployment dep = i2.next();

          for (UUID nodeId : dep.getParticipantNodeIds())
            if (ctx.discovery().node(nodeId) == null) dep.removeParticipant(nodeId);

          if (!dep.hasParticipants()) {
            if (dep.deployMode() == SHARED) {
              if (!dep.isUndeployed()) {
                dep.undeploy();

                // Undeploy.
                i2.remove();

                dep.onRemoved();

                undeployed.add(dep);

                if (log.isDebugEnabled())
                  log.debug("Undeployed class loader as there are no participating nodes: " + dep);
              }
            } else if (log.isDebugEnabled())
              log.debug("Preserving deployment without node participants: " + dep);
          } else if (log.isDebugEnabled())
            log.debug("Keeping deployment as it still has participants: " + dep);
        }

        if (deps.isEmpty()) i1.remove();
      }
    }

    recordUndeployed(null, undeployed);

    if (log.isDebugEnabled()) log.debug("Registered deployment discovery listener: " + discoLsnr);
  }