/** @throws Exception If failed. */
  public void testProjectionRun() throws Exception {
    GridClientCompute dflt = client.compute();

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

    assertEquals(NODES_CNT, nodes.size());

    for (int i = 0; i < NODES_CNT; i++) {
      Grid g = grid(i);

      assert g != null;

      GridClientNode clientNode = dflt.node(g.localNode().id());

      assertNotNull("Client node for " + g.localNode().id() + " was not found", clientNode);

      GridClientCompute prj = dflt.projection(clientNode);

      String res = prj.execute(TestTask.class.getName(), null);

      assertNotNull(res);

      assertEquals(g.localNode().id().toString(), res);
    }
  }
  /** @throws Exception If failed. */
  public void testDisabledRest() throws Exception {
    restEnabled = false;

    final Grid g = startGrid("disabled-rest");

    try {
      Thread.sleep(2 * TOP_REFRESH_FREQ);

      // As long as we have round robin load balancer this will cause every node to be queried.
      for (int i = 0; i < NODES_CNT + 1; i++)
        assertEquals(NODES_CNT + 1, client.compute().refreshTopology(false, false).size());

      final GridClientData data = client.data(PARTITIONED_CACHE_NAME);

      // Check rest-disabled node is unavailable.
      try {
        String affKey;

        do {
          affKey = UUID.randomUUID().toString();
        } while (!data.affinity(affKey).equals(g.localNode().id()));

        data.put(affKey, "asdf");

        assertEquals("asdf", cache(0, PARTITIONED_CACHE_NAME).get(affKey));
      } catch (GridServerUnreachableException e) {
        // Thrown for direct client-node connections.
        assertTrue(
            "Unexpected exception message: " + e.getMessage(),
            e.getMessage()
                .startsWith("No available endpoints to connect (is rest enabled for this node?)"));
      } catch (GridClientException e) {
        // Thrown for routed client-router-node connections.
        String msg = e.getMessage();

        assertTrue(
            "Unexpected exception message: " + msg,
            protocol() == GridClientProtocol.TCP
                ? msg.contains("No available endpoints to connect (is rest enabled for this node?)")
                : // TCP router.
                msg.startsWith(
                    "No available nodes on the router for destination node ID")); // HTTP router.
      }

      // Check rest-enabled nodes are available.
      String affKey;

      do {
        affKey = UUID.randomUUID().toString();
      } while (data.affinity(affKey).equals(g.localNode().id()));

      data.put(affKey, "fdsa");

      assertEquals("fdsa", cache(0, PARTITIONED_CACHE_NAME).get(affKey));
    } finally {
      restEnabled = true;

      G.stop(g.name(), true);
    }
  }
    /** {@inheritDoc} */
    @Override
    protected Collection<? extends GridComputeJob> split(int gridSize, Object arg)
        throws GridException {
      Collection<GridComputeJobAdapter> jobs = new ArrayList<>(gridSize);

      this.gridSize = gridSize;

      final String locNodeId = grid.localNode().id().toString();

      for (int i = 0; i < gridSize; i++) {
        jobs.add(
            new GridComputeJobAdapter() {
              @SuppressWarnings("OverlyStrongTypeCast")
              @Override
              public Object execute() {
                try {
                  Thread.sleep(1000);
                } catch (InterruptedException ignored) {
                  Thread.currentThread().interrupt();
                }

                return new GridBiTuple<>(locNodeId, 1);
              }
            });
      }

      return jobs;
    }
  /** @throws Exception If failed. */
  public void testInvalidateFlag() throws Exception {
    GridEx g0 = grid(0);

    GridCache<String, String> cache = g0.cache(PARTITIONED_CACHE_NAME);

    String key = null;

    for (int i = 0; i < 10_000; i++) {
      if (!cache.affinity().isPrimaryOrBackup(g0.localNode(), String.valueOf(i))) {
        key = String.valueOf(i);

        break;
      }
    }

    assertNotNull(key);

    cache.put(key, key); // Create entry in near cache, it is invalidated if INVALIDATE flag is set.

    assertNotNull(cache.peek(key));

    GridClientData d = client.data(PARTITIONED_CACHE_NAME);

    d.flagsOn(GridClientCacheFlag.INVALIDATE).put(key, "zzz");

    for (Grid g : G.allGrids()) {
      cache = g.cache(PARTITIONED_CACHE_NAME);

      if (cache.affinity().isPrimaryOrBackup(g.localNode(), key))
        assertEquals("zzz", cache.peek(key));
      else assertNull(cache.peek(key));
    }
  }
  /** @throws Exception If failed. */
  public void testAffinityExecute() throws Exception {
    GridClientCompute dflt = client.compute();

    GridClientData data = client.data(PARTITIONED_CACHE_NAME);

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

    assertEquals(NODES_CNT, nodes.size());

    for (int i = 0; i < NODES_CNT; i++) {
      Grid g = grid(i);

      assert g != null;

      int affinityKey = -1;

      for (int key = 0; key < 10000; key++) {
        if (g.localNode().id().equals(data.affinity(key))) {
          affinityKey = key;

          break;
        }
      }

      if (affinityKey == -1)
        throw new Exception("Unable to found key for which node is primary: " + g.localNode().id());

      GridClientNode clientNode = dflt.node(g.localNode().id());

      assertNotNull("Client node for " + g.localNode().id() + " was not found", clientNode);

      String res =
          dflt.affinityExecute(TestTask.class.getName(), PARTITIONED_CACHE_NAME, affinityKey, null);

      assertNotNull(res);

      assertEquals(g.localNode().id().toString(), res);
    }
  }
  /** @throws Exception If failed. */
  public void testTopologyListener() throws Exception {
    final Collection<UUID> added = new ArrayList<>(1);
    final Collection<UUID> rmvd = new ArrayList<>(1);

    final CountDownLatch addedLatch = new CountDownLatch(1);
    final CountDownLatch rmvLatch = new CountDownLatch(1);

    assertEquals(NODES_CNT, client.compute().refreshTopology(false, false).size());

    GridClientTopologyListener lsnr =
        new GridClientTopologyListener() {
          @Override
          public void onNodeAdded(GridClientNode node) {
            added.add(node.nodeId());

            addedLatch.countDown();
          }

          @Override
          public void onNodeRemoved(GridClientNode node) {
            rmvd.add(node.nodeId());

            rmvLatch.countDown();
          }
        };

    client.addTopologyListener(lsnr);

    try {
      Grid g = startGrid(NODES_CNT + 1);

      UUID id = g.localNode().id();

      assertTrue(addedLatch.await(2 * TOP_REFRESH_FREQ, MILLISECONDS));

      assertEquals(1, added.size());
      assertEquals(id, F.first(added));

      stopGrid(NODES_CNT + 1);

      assertTrue(rmvLatch.await(2 * TOP_REFRESH_FREQ, MILLISECONDS));

      assertEquals(1, rmvd.size());
      assertEquals(id, F.first(rmvd));
    } finally {
      client.removeTopologyListener(lsnr);

      stopGrid(NODES_CNT + 1);
    }
  }
  /** @throws GridException If failed. */
  public void testAffinity() throws GridException {
    Grid g1 = grid(1);
    Grid g2 = grid(2);

    assert caches(g1).size() == 0;
    assert F.first(caches(g2)).getCacheMode() == PARTITIONED;

    Map<GridNode, Collection<String>> map = g1.mapKeysToNodes(null, F.asList("1"));

    assertNotNull(map);
    assertEquals("Invalid map size: " + map.size(), 1, map.size());
    assertEquals(F.first(map.keySet()), g2.localNode());

    UUID id1 = g1.mapKeyToNode(null, "2").id();

    assertNotNull(id1);
    assertEquals(g2.localNode().id(), id1);

    UUID id2 = g1.mapKeyToNode(null, "3").id();

    assertNotNull(id2);
    assertEquals(g2.localNode().id(), id2);
  }
  /**
   * Starts the local node and checks for presence of log file. Also checks that this is really a
   * log of a started node.
   *
   * @param id Test-local node ID.
   * @throws Exception If error occurred.
   */
  private void checkOneNode(int id) throws Exception {
    try (Grid grid = G.start(getConfiguration("grid" + id))) {
      String id8 = U.id8(grid.localNode().id());
      String logPath = "work/log/gridgain-" + id8 + ".log";
      File logFile = U.resolveGridGainPath(logPath);

      assertNotNull("Failed to resolve path: " + logPath, logFile);
      assertTrue("Log file does not exist: " + logFile, logFile.exists());

      String logContent = U.readFileToString(logFile.getAbsolutePath(), "UTF-8");

      assertTrue(
          "Log file does not contain it's node ID: " + logFile,
          logContent.contains(">>> Local node [ID=" + id8.toUpperCase()));
    }
  }
  /** @throws Exception If failed. */
  public void testKeyMappingOnComputeNode() throws Exception {
    try {
      cache = true;

      for (int i = 0; i < 4; i++) {
        nearOnly = i == 0;

        startGrid(i);
      }

      cache = false;

      Grid compute = startGrid(4);

      for (int i = 0; i < 100; i++) {
        GridNode node = compute.mapKeyToNode(null, i);

        assertFalse("For key: " + i, node.id().equals(compute.localNode().id()));
        assertFalse("For key: " + i, node.id().equals(grid(0).localNode().id()));
      }
    } finally {
      stopAllGrids();
    }
  }