/** Stops Jetty. */
  private void stopJetty() {
    // Jetty does not really stop the server if port is busy.
    try {
      if (httpSrv != null) {
        // If server was successfully started, deregister ports.
        if (httpSrv.isStarted()) ctx.ports().deregisterPorts(getClass());

        // Record current interrupted status of calling thread.
        boolean interrupted = Thread.interrupted();

        try {
          httpSrv.stop();
        } finally {
          // Reset interrupted flag on calling thread.
          if (interrupted) Thread.currentThread().interrupt();
        }
      }
    } catch (InterruptedException ignored) {
      if (log.isDebugEnabled()) log.debug("Thread has been interrupted.");

      Thread.currentThread().interrupt();
    } catch (Exception e) {
      U.error(log, "Failed to stop Jetty HTTP server.", e);
    }
  }
  /** @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);
    }
  }
  /** @throws Exception If failed. */
  public void testAffinityPut() throws Exception {
    Thread.sleep(2 * TOP_REFRESH_FREQ);

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

    Map<UUID, Grid> gridsByLocNode = new HashMap<>(NODES_CNT);

    GridClientData partitioned = client.data(PARTITIONED_CACHE_NAME);

    GridClientCompute compute = client.compute();

    for (int i = 0; i < NODES_CNT; i++) gridsByLocNode.put(grid(i).localNode().id(), grid(i));

    for (int i = 0; i < 100; i++) {
      String key = "key" + i;

      UUID primaryNodeId = grid(0).mapKeyToNode(PARTITIONED_CACHE_NAME, key).id();

      assertEquals("Affinity mismatch for key: " + key, primaryNodeId, partitioned.affinity(key));

      assertEquals(primaryNodeId, partitioned.affinity(key));

      // Must go to primary node only. Since backup count is 0, value must present on
      // primary node only.
      partitioned.put(key, "val" + key);

      for (Map.Entry<UUID, Grid> entry : gridsByLocNode.entrySet()) {
        Object val = entry.getValue().cache(PARTITIONED_CACHE_NAME).peek(key);

        if (primaryNodeId.equals(entry.getKey())) assertEquals("val" + key, val);
        else assertNull(val);
      }
    }

    // Now check that we will see value in near cache in pinned mode.
    for (int i = 100; i < 200; i++) {
      String pinnedKey = "key" + i;

      UUID primaryNodeId = grid(0).mapKeyToNode(PARTITIONED_CACHE_NAME, pinnedKey).id();

      UUID pinnedNodeId = F.first(F.view(gridsByLocNode.keySet(), F.notEqualTo(primaryNodeId)));

      GridClientNode node = compute.node(pinnedNodeId);

      partitioned.pinNodes(node).put(pinnedKey, "val" + pinnedKey);

      for (Map.Entry<UUID, Grid> entry : gridsByLocNode.entrySet()) {
        Object val = entry.getValue().cache(PARTITIONED_CACHE_NAME).peek(pinnedKey);

        if (primaryNodeId.equals(entry.getKey()) || pinnedNodeId.equals(entry.getKey()))
          assertEquals("val" + pinnedKey, val);
        else assertNull(val);
      }
    }
  }
  /**
   * @param alias Class alias.
   * @return Deployed class.
   */
  @Nullable
  private GridDeployment getDeployment(String alias) {
    assert Thread.holdsLock(mux);

    LinkedList<GridDeployment> deps = cache.get(alias);

    if (deps != null) {
      assert !deps.isEmpty();

      GridDeployment dep = deps.getFirst();

      if (!dep.isUndeployed()) {
        return dep;
      }
    }

    return null;
  }
  /**
   * @param depMode Deployment mode.
   * @param ldr Class loader to deploy.
   * @param cls Class.
   * @param alias Class alias.
   * @return Deployment.
   */
  @SuppressWarnings({"ConstantConditions"})
  private GridDeployment deploy(
      GridDeploymentMode depMode, ClassLoader ldr, Class<?> cls, String alias) {
    assert Thread.holdsLock(mux);

    LinkedList<GridDeployment> cachedDeps = null;

    GridDeployment dep = null;

    // Find existing class loader info.
    for (LinkedList<GridDeployment> deps : cache.values()) {
      for (GridDeployment d : deps) {
        if (d.classLoader() == ldr) {
          // Cache class and alias.
          d.addDeployedClass(cls, alias);

          cachedDeps = deps;

          dep = d;

          break;
        }
      }

      if (cachedDeps != null) {
        break;
      }
    }

    if (cachedDeps != null) {
      assert dep != null;

      cache.put(alias, cachedDeps);

      if (!cls.getName().equals(alias)) {
        // Cache by class name as well.
        cache.put(cls.getName(), cachedDeps);
      }

      return dep;
    }

    GridUuid ldrId = GridUuid.randomUuid();

    long seqNum = seq.incrementAndGet();

    String userVer = getUserVersion(ldr);

    dep = new GridDeployment(depMode, ldr, ldrId, seqNum, userVer, cls.getName(), true);

    dep.addDeployedClass(cls, alias);

    LinkedList<GridDeployment> deps =
        F.addIfAbsent(cache, alias, F.<GridDeployment>newLinkedList());

    if (!deps.isEmpty()) {
      for (GridDeployment d : deps) {
        if (!d.isUndeployed()) {
          U.error(
              log,
              "Found more than one active deployment for the same resource "
                  + "[cls="
                  + cls
                  + ", depMode="
                  + depMode
                  + ", dep="
                  + d
                  + ']');

          return null;
        }
      }
    }

    // Add at the beginning of the list for future fast access.
    deps.addFirst(dep);

    if (!cls.getName().equals(alias)) {
      // Cache by class name as well.
      cache.put(cls.getName(), deps);
    }

    if (log.isDebugEnabled()) {
      log.debug("Created new deployment: " + dep);
    }

    return dep;
  }
  /** {@inheritDoc} */
  @Nullable
  @SuppressWarnings({"UnusedCatchParameter"})
  @Override
  public GridDeployment getDeployment(GridDeploymentMetadata meta) {
    GridDeployment dep;

    Class<?> cls = null;

    String alias = meta.alias();

    synchronized (mux) {
      // Validate metadata.
      assert meta.alias() != null;

      dep = getDeployment(meta.alias());

      if (dep != null) {
        if (log.isDebugEnabled()) {
          log.debug("Acquired deployment class from local cache: " + dep);
        }

        return dep;
      }

      GridDeploymentResource rsrc = spi.findResource(meta.alias());

      if (rsrc != null) {
        dep =
            deploy(
                ctx.config().getDeploymentMode(),
                rsrc.getClassLoader(),
                rsrc.getResourceClass(),
                alias);

        if (dep == null) {
          return null;
        }

        if (log.isDebugEnabled()) {
          log.debug("Acquired deployment class from SPI: " + dep);
        }
      }
      // Auto-deploy.
      else {
        ClassLoader ldr = meta.classLoader();

        if (ldr == null) {
          ldr = Thread.currentThread().getContextClassLoader();

          // Safety.
          if (ldr == null) {
            ldr = ctxLdr;
          }
        }

        // Don't auto-deploy locally in case of nested execution.
        if (ldr instanceof GridDeploymentClassLoader) {
          return null;
        }

        try {
          // Check that class can be loaded.
          cls = ldr.loadClass(meta.alias());

          spi.register(ldr, cls);

          rsrc = spi.findResource(alias);

          if (rsrc != null && rsrc.getResourceClass().equals(cls)) {
            if (log.isDebugEnabled()) {
              log.debug("Retrieved auto-loaded resource from spi: " + rsrc);
            }

            dep = deploy(ctx.config().getDeploymentMode(), ldr, cls, alias);

            if (dep == null) {
              return null;
            }
          } else {
            U.warn(
                log,
                "Failed to find resource from deployment SPI even after registering it: "
                    + meta.alias());

            return null;
          }
        } catch (ClassNotFoundException e) {
          if (log.isDebugEnabled()) {
            log.debug(
                "Failed to load class for local auto-deployment [ldr="
                    + ldr
                    + ", meta="
                    + meta
                    + ']');
          }

          return null;
        } catch (GridSpiException e) {
          U.error(log, "Failed to deploy local class: " + meta.alias(), e);

          return null;
        }
      }
    }

    if (cls != null) {
      recordDeploy(cls, alias, meta.isRecord());

      dep.addDeployedClass(cls, meta.className(), meta.alias());
    }

    if (log.isDebugEnabled()) {
      log.debug("Acquired deployment class: " + dep);
    }

    return dep;
  }