/** @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 testPutAndEvictAll() throws Exception {
    GridCache<Object, String> c = grid().cache(DATA_CACHE_NAME);

    assertEquals("value1", svc.cachePut(1));
    assertEquals("value2", svc.cachePut(2));

    assertEquals(4, c.size());

    assertEquals("value1", c.get(key("testCache1", 1)));
    assertEquals("value1", c.get(key("testCache2", 1)));
    assertEquals("value2", c.get(key("testCache1", 2)));
    assertEquals("value2", c.get(key("testCache2", 2)));

    svc.cacheEvictAll();

    assertEquals(2, c.size());

    assertEquals(null, c.get(key("testCache1", 1)));
    assertEquals("value1", c.get(key("testCache2", 1)));
    assertEquals(null, c.get(key("testCache1", 2)));
    assertEquals("value2", c.get(key("testCache2", 2)));
  }
  /**
   * Test GGFS construction.
   *
   * @throws GridException In case of exception.
   */
  public void testConfiguration() throws GridException {
    GridCache metaCache = getFieldValue(fs, "meta", "metaCache");
    GridCache dataCache = getFieldValue(fs, "data", "dataCache");

    assertNotNull(metaCache);
    assertEquals(META_CACHE_NAME, metaCache.name());
    assertEquals(REPLICATED, metaCache.configuration().getCacheMode());

    assertNotNull(dataCache);
    assertEquals(DATA_CACHE_NAME, dataCache.name());
    assertEquals(PARTITIONED, dataCache.configuration().getCacheMode());
  }
  /** @throws Exception If failed. */
  public void testNodeLeave() throws Exception {
    try {
      cache = true;

      for (int i = 0; i < 2; i++) {
        nearOnly = i == 0;

        startGrid(i);
      }

      for (int i = 0; i < 10; i++) grid(1).cache(null).put(i, i);

      final GridCache<Object, Object> nearOnly = grid(0).cache(null);

      // Populate near cache.
      for (int i = 0; i < 10; i++) {
        assertEquals(i, nearOnly.get(i));
        assertEquals(i, nearOnly.peek(i));
      }

      // Stop the only dht node.
      stopGrid(1);

      for (int i = 0; i < 10; i++) {
        assertNull(nearOnly.peek(i));

        final int key = i;

        GridTestUtils.assertThrows(
            log,
            new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                return nearOnly.get(key);
              }
            },
            GridTopologyException.class,
            null);
      }

      // Test optimistic transaction.
      GridTestUtils.assertThrows(
          log,
          new Callable<Object>() {
            @Override
            public Object call() throws Exception {
              try (GridCacheTx tx = nearOnly.txStart(OPTIMISTIC, REPEATABLE_READ)) {
                nearOnly.putx("key", "val");

                tx.commit();
              }

              return null;
            }
          },
          GridTopologyException.class,
          null);

      // Test pessimistic transaction.
      GridTestUtils.assertThrows(
          log,
          new Callable<Object>() {
            @Override
            public Object call() throws Exception {
              try (GridCacheTx tx = nearOnly.txStart(PESSIMISTIC, REPEATABLE_READ)) {
                nearOnly.put("key", "val");

                tx.commit();
              }

              return null;
            }
          },
          GridTopologyException.class,
          null);

    } finally {
      stopAllGrids();
    }
  }
  /** @throws Exception If failed. */
  public void testCreateFileFragmented() throws Exception {
    GridGgfsEx impl = (GridGgfsEx) grid(0).ggfs("ggfs");

    GridGgfsFragmentizerManager fragmentizer = impl.context().fragmentizer();

    GridTestUtils.setFieldValue(fragmentizer, "fragmentizerEnabled", false);

    GridGgfsPath path = new GridGgfsPath("/file");

    try {
      GridGgfs fs0 = grid(0).ggfs("ggfs");
      GridGgfs fs1 = grid(1).ggfs("ggfs");
      GridGgfs fs2 = grid(2).ggfs("ggfs");

      try (GridGgfsOutputStream out =
          fs0.create(
              path,
              128,
              false,
              1,
              CFG_GRP_SIZE,
              F.asMap(GridGgfs.PROP_PREFER_LOCAL_WRITES, "true"))) {
        // 1.5 blocks
        byte[] data = new byte[CFG_BLOCK_SIZE * 3 / 2];

        Arrays.fill(data, (byte) 1);

        out.write(data);
      }

      try (GridGgfsOutputStream out = fs1.append(path, false)) {
        // 1.5 blocks.
        byte[] data = new byte[CFG_BLOCK_SIZE * 3 / 2];

        Arrays.fill(data, (byte) 2);

        out.write(data);
      }

      // After this we should have first two block colocated with grid 0 and last block colocated
      // with grid 1.
      GridGgfsFileImpl fileImpl = (GridGgfsFileImpl) fs.info(path);

      GridCache<Object, Object> metaCache = grid(0).cachex(META_CACHE_NAME);

      GridGgfsFileInfo fileInfo = (GridGgfsFileInfo) metaCache.get(fileImpl.fileId());

      GridGgfsFileMap map = fileInfo.fileMap();

      List<GridGgfsFileAffinityRange> ranges = map.ranges();

      assertEquals(2, ranges.size());

      assertTrue(ranges.get(0).startOffset() == 0);
      assertTrue(ranges.get(0).endOffset() == 2 * CFG_BLOCK_SIZE - 1);

      assertTrue(ranges.get(1).startOffset() == 2 * CFG_BLOCK_SIZE);
      assertTrue(ranges.get(1).endOffset() == 3 * CFG_BLOCK_SIZE - 1);

      // Validate data read after colocated writes.
      try (GridGgfsInputStream in = fs2.open(path)) {
        // Validate first part of file.
        for (int i = 0; i < CFG_BLOCK_SIZE * 3 / 2; i++) assertEquals((byte) 1, in.read());

        // Validate second part of file.
        for (int i = 0; i < CFG_BLOCK_SIZE * 3 / 2; i++) assertEquals((byte) 2, in.read());

        assertEquals(-1, in.read());
      }
    } finally {
      GridTestUtils.setFieldValue(fragmentizer, "fragmentizerEnabled", true);

      boolean hasData = false;

      for (int i = 0; i < NODES_CNT; i++) hasData |= !grid(i).cachex(DATA_CACHE_NAME).isEmpty();

      assertTrue(hasData);

      fs.delete(path, true);
    }

    GridTestUtils.retryAssert(
        log,
        ASSERT_RETRIES,
        ASSERT_RETRY_INTERVAL,
        new CAX() {
          @Override
          public void applyx() {
            for (int i = 0; i < NODES_CNT; i++)
              assertTrue(grid(i).cachex(DATA_CACHE_NAME).isEmpty());
          }
        });
  }