/** @throws Exception If failed. */
  public void testSystemCache() throws Exception {
    CollectionConfiguration colCfg = collectionConfiguration();

    IgniteQueue queue = grid(0).queue("Queue1", 0, colCfg);

    final CacheConfiguration ccfg = getQueueCache(queue);

    GridTestUtils.assertThrows(
        log,
        new Callable<Object>() {
          @Override
          public Object call() throws Exception {
            grid(0).cache(ccfg.getName());
            return null;
          }
        },
        IllegalStateException.class,
        "Failed to get cache because it is a system cache");

    assertNotNull(((IgniteKernal) grid(0)).internalCache(ccfg.getName()));
  }
  /**
   * @param ignite Ignite instance.
   * @param ccfg Cache configuration.
   * @return Data transfer object for cache store configuration properties.
   */
  public static VisorCacheStoreConfiguration from(Ignite ignite, CacheConfiguration ccfg) {
    VisorCacheStoreConfiguration cfg = new VisorCacheStoreConfiguration();

    GridCacheAdapter<Object, Object> c = ((IgniteKernal) ignite).internalCache(ccfg.getName());

    CacheStore store =
        c != null && c.context().started() ? c.context().store().configuredStore() : null;

    cfg.jdbcStore = store instanceof CacheAbstractJdbcStore;

    cfg.store = compactClass(store);
    cfg.storeFactory = compactClass(ccfg.getCacheStoreFactory());

    cfg.readThrough = ccfg.isReadThrough();
    cfg.writeThrough = ccfg.isWriteThrough();

    cfg.writeBehindEnabled = ccfg.isWriteBehindEnabled();
    cfg.batchSz = ccfg.getWriteBehindBatchSize();
    cfg.flushFreq = ccfg.getWriteBehindFlushFrequency();
    cfg.flushSz = ccfg.getWriteBehindFlushSize();
    cfg.flushThreadCnt = ccfg.getWriteBehindFlushThreadCount();

    return cfg;
  }
  /** {@inheritDoc} */
  @Override
  protected IgniteConfiguration getConfiguration(String gridName) throws Exception {
    IgniteConfiguration cfg = super.getConfiguration(gridName);

    TcpDiscoverySpi spi = new TcpDiscoverySpi();

    spi.setIpFinder(IP_FINDER);

    cfg.setDiscoverySpi(spi);

    cfg.setIncludeProperties();

    cfg.setIncludeEventTypes(EVT_TASK_FAILED, EVT_TASK_FINISHED, EVT_JOB_MAPPED);

    cfg.setConnectorConfiguration(null);

    cfg.setPeerClassLoadingEnabled(true);

    if (useCache) {
      CacheConfiguration cc = defaultCacheConfiguration();

      cc.setCacheMode(PARTITIONED);

      cc.setNearConfiguration(null);
      cc.setWriteSynchronizationMode(FULL_SYNC);
      cc.setStartSize(ENTRY_CNT / GRID_CNT);
      cc.setSwapEnabled(false);

      cc.setBackups(1);

      cfg.setCacheSanityCheckEnabled(false);
      cfg.setCacheConfiguration(cc);
    } else cfg.setCacheConfiguration();

    return cfg;
  }
  /** {@inheritDoc} */
  @Override
  protected IgniteConfiguration getConfiguration(String gridName) throws Exception {
    IgniteConfiguration c = super.getConfiguration(gridName);

    TcpDiscoverySpi disco = new TcpDiscoverySpi();

    disco.setIpFinder(ipFinder);

    c.setDiscoverySpi(disco);

    CacheConfiguration<?, ?> cc = defaultCacheConfiguration();

    cc.setCacheMode(PARTITIONED);
    cc.setBackups(1);
    cc.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
    cc.setAtomicityMode(TRANSACTIONAL);
    cc.setIndexedTypes(Integer.class, Integer.class);

    c.setCacheConfiguration(cc);

    return c;
  }
  /**
   * Start grid with IGFS.
   *
   * @param gridName Grid name.
   * @param igfsName IGFS name
   * @param mode IGFS mode.
   * @param secondaryFs Secondary file system (optional).
   * @param restCfg Rest configuration string (optional).
   * @return Started grid instance.
   * @throws Exception If failed.
   */
  protected Ignite startGridWithIgfs(
      String gridName,
      String igfsName,
      IgfsMode mode,
      @Nullable IgfsSecondaryFileSystem secondaryFs,
      @Nullable IgfsIpcEndpointConfiguration restCfg)
      throws Exception {
    FileSystemConfiguration igfsCfg = new FileSystemConfiguration();

    igfsCfg.setDataCacheName("dataCache");
    igfsCfg.setMetaCacheName("metaCache");
    igfsCfg.setName(igfsName);
    igfsCfg.setBlockSize(IGFS_BLOCK_SIZE);
    igfsCfg.setDefaultMode(mode);
    igfsCfg.setIpcEndpointConfiguration(restCfg);
    igfsCfg.setSecondaryFileSystem(secondaryFs);
    igfsCfg.setPrefetchBlocks(PREFETCH_BLOCKS);
    igfsCfg.setSequentialReadsBeforePrefetch(SEQ_READS_BEFORE_PREFETCH);

    CacheConfiguration dataCacheCfg = defaultCacheConfiguration();

    dataCacheCfg.setName("dataCache");
    dataCacheCfg.setCacheMode(PARTITIONED);
    dataCacheCfg.setNearConfiguration(null);
    dataCacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
    dataCacheCfg.setAffinityMapper(new IgfsGroupDataBlocksKeyMapper(2));
    dataCacheCfg.setBackups(0);
    dataCacheCfg.setAtomicityMode(TRANSACTIONAL);
    dataCacheCfg.setOffHeapMaxMemory(0);

    CacheConfiguration metaCacheCfg = defaultCacheConfiguration();

    metaCacheCfg.setName("metaCache");
    metaCacheCfg.setCacheMode(REPLICATED);
    metaCacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
    metaCacheCfg.setAtomicityMode(TRANSACTIONAL);

    IgniteConfiguration cfg = new IgniteConfiguration();

    cfg.setGridName(gridName);

    TcpDiscoverySpi discoSpi = new TcpDiscoverySpi();

    discoSpi.setIpFinder(new TcpDiscoveryVmIpFinder(true));

    cfg.setDiscoverySpi(discoSpi);
    cfg.setCacheConfiguration(dataCacheCfg, metaCacheCfg);
    cfg.setFileSystemConfiguration(igfsCfg);

    cfg.setLocalHost("127.0.0.1");
    cfg.setConnectorConfiguration(null);

    return G.start(cfg);
  }
  /** {@inheritDoc} */
  @SuppressWarnings("unchecked")
  @Override
  protected IgniteConfiguration getConfiguration(String gridName) throws Exception {
    IgniteConfiguration c = super.getConfiguration(gridName);

    TransactionConfiguration txCfg = c.getTransactionConfiguration();

    txCfg.setDefaultTxConcurrency(txConcurrency);
    txCfg.setDefaultTxIsolation(txIsolation);
    txCfg.setTxSerializableEnabled(true);

    CacheConfiguration cc = defaultCacheConfiguration();

    cc.setCacheMode(cacheMode());
    cc.setAtomicityMode(TRANSACTIONAL);

    cc.setSwapEnabled(false);

    cc.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);

    cc.setEvictionPolicy(plc);
    cc.setEvictSynchronizedKeyBufferSize(1);

    cc.setEvictSynchronized(true);

    if (testStore != null) {
      cc.setCacheStoreFactory(singletonFactory(testStore));
      cc.setReadThrough(true);
      cc.setWriteThrough(true);
      cc.setLoadPreviousValue(true);
    } else cc.setCacheStoreFactory(null);

    c.setCacheConfiguration(cc);

    TcpDiscoverySpi disco = new TcpDiscoverySpi();

    disco.setIpFinder(ipFinder);

    c.setDiscoverySpi(disco);

    return c;
  }