How to use NodeStatus class of org.openqa.selenium.grid.data package

Best Selenium code snippet using org.openqa.selenium.grid.data.NodeStatus

Source:GridModel.java

...22import org.openqa.selenium.grid.data.NodeDrainStarted;23import org.openqa.selenium.grid.data.NodeId;24import org.openqa.selenium.grid.data.NodeRejectedEvent;25import org.openqa.selenium.grid.data.NodeRemovedEvent;26import org.openqa.selenium.grid.data.NodeStatus;27import org.openqa.selenium.grid.data.NodeStatusEvent;28import org.openqa.selenium.grid.data.Session;29import org.openqa.selenium.grid.data.SessionClosedEvent;30import org.openqa.selenium.grid.data.Slot;31import org.openqa.selenium.grid.data.SlotId;32import org.openqa.selenium.grid.security.Secret;33import org.openqa.selenium.internal.Require;34import org.openqa.selenium.remote.SessionId;35import java.time.Instant;36import java.util.HashSet;37import java.util.Iterator;38import java.util.Map;39import java.util.Objects;40import java.util.Optional;41import java.util.Set;42import java.util.concurrent.ConcurrentHashMap;43import java.util.concurrent.locks.Lock;44import java.util.concurrent.locks.ReadWriteLock;45import java.util.concurrent.locks.ReentrantReadWriteLock;46import java.util.logging.Logger;47import static org.openqa.selenium.grid.data.Availability.DOWN;48import static org.openqa.selenium.grid.data.Availability.DRAINING;49import static org.openqa.selenium.grid.data.Availability.UP;50public class GridModel {51  private static final Logger LOG = Logger.getLogger(GridModel.class.getName());52  private static final SessionId RESERVED = new SessionId("reserved");53  private final ReadWriteLock lock = new ReentrantReadWriteLock(/* fair */ true);54  private final Map<Availability, Set<NodeStatus>> nodes = new ConcurrentHashMap<>();55  private final EventBus events;56  public GridModel(EventBus events, Secret registrationSecret) {57    this.events = Require.nonNull("Event bus", events);58    events.addListener(NodeDrainStarted.listener(nodeId -> setAvailability(nodeId, DRAINING)));59    events.addListener(NodeDrainComplete.listener(this::remove));60    events.addListener(NodeRemovedEvent.listener(this::remove));61    events.addListener(NodeStatusEvent.listener(status -> refresh(registrationSecret, status)));62    events.addListener(SessionClosedEvent.listener(this::release));63  }64  public GridModel add(NodeStatus node) {65    Require.nonNull("Node", node);66    Lock writeLock = lock.writeLock();67    writeLock.lock();68    try {69      // If we've already added the node, remove it.70      for (Set<NodeStatus> nodes : nodes.values()) {71        Iterator<NodeStatus> iterator = nodes.iterator();72        while (iterator.hasNext()) {73          NodeStatus next = iterator.next();74          // If the ID is the same, we're re-adding a node. If the URI is the same a node probably restarted75          if (next.getId().equals(node.getId()) || next.getUri().equals(node.getUri())) {76            LOG.info(String.format("Re-adding node with id %s and URI %s.", node.getId(), node.getUri()));77            iterator.remove();78          }79        }80      }81      // Nodes are initially added in the "down" state until something changes their availability82      nodes(DOWN).add(node);83    } finally {84      writeLock.unlock();85    }86    return this;87  }88  public GridModel refresh(Secret registrationSecret, NodeStatus status) {89    Require.nonNull("Node status", status);90    Secret statusSecret = status.getRegistrationSecret() == null ? null : new Secret(status.getRegistrationSecret());91    if (!Objects.equals(registrationSecret, statusSecret)) {92      LOG.severe(String.format("Node at %s failed to send correct registration secret. Node NOT refreshed.", status.getUri()));93      events.fire(new NodeRejectedEvent(status.getUri()));94      return this;95    }96    Lock writeLock = lock.writeLock();97    writeLock.lock();98    try {99      AvailabilityAndNode availabilityAndNode = findNode(status.getId());100      if (availabilityAndNode == null) {101        return this;102      }103      // if the node was marked as "down", keep it down until a healthcheck passes:104      // just because the node can hit the event bus doesn't mean it's reachable105      if (DOWN.equals(availabilityAndNode.availability)) {106        nodes(DOWN).remove(availabilityAndNode.status);107        nodes(DOWN).add(status);108        return this;109      }110      // But do trust the node if it tells us it's draining111      nodes(availabilityAndNode.availability).remove(availabilityAndNode.status);112      nodes(status.getAvailability()).add(status);113      return this;114    } finally {115      writeLock.unlock();116    }117  }118  public GridModel remove(NodeId id) {119    Require.nonNull("Node ID", id);120    Lock writeLock = lock.writeLock();121    writeLock.lock();122    try {123      AvailabilityAndNode availabilityAndNode = findNode(id);124      if (availabilityAndNode == null) {125        return this;126      }127      nodes(availabilityAndNode.availability).remove(availabilityAndNode.status);128      return this;129    } finally {130      writeLock.unlock();131    }132  }133  public Availability setAvailability(NodeId id, Availability availability) {134    Require.nonNull("Node ID", id);135    Require.nonNull("Availability", availability);136    Lock writeLock = lock.writeLock();137    writeLock.lock();138    try {139      AvailabilityAndNode availabilityAndNode = findNode(id);140      if (availabilityAndNode == null) {141        return DOWN;142      }143      if (availability.equals(availabilityAndNode.availability)) {144        return availability;145      }146      nodes(availabilityAndNode.availability).remove(availabilityAndNode.status);147      nodes(availability).add(availabilityAndNode.status);148      LOG.info(String.format(149        "Switching node %s (uri: %s) from %s to %s",150        id,151        availabilityAndNode.status.getUri(),152        availabilityAndNode.availability,153        availability));154      return availabilityAndNode.availability;155    } finally {156      writeLock.unlock();157    }158  }159  public boolean reserve(SlotId slotId) {160    Lock writeLock = lock.writeLock();161    writeLock.lock();162    try {163      AvailabilityAndNode node = findNode(slotId.getOwningNodeId());164      if (node == null) {165        LOG.warning(String.format("Asked to reserve slot on node %s, but unable to find node", slotId.getOwningNodeId()));166        return false;167      }168      if (!UP.equals(node.availability)) {169        LOG.warning(String.format(170          "Asked to reserve a slot on node %s, but not is %s",171          slotId.getOwningNodeId(),172          node.availability));173        return false;174      }175      Optional<Slot> maybeSlot = node.status.getSlots().stream()176        .filter(slot -> slotId.equals(slot.getId()))177        .findFirst();178      if (!maybeSlot.isPresent()) {179        LOG.warning(String.format(180          "Asked to reserve slot on node %s, but no slot with id %s found",181          node.status.getId(),182          slotId));183        return false;184      }185      reserve(node.status, maybeSlot.get());186      return true;187    } finally {188      writeLock.unlock();189    }190  }191  public Set<NodeStatus> getSnapshot() {192    Lock readLock = this.lock.readLock();193    readLock.lock();194    try {195      ImmutableSet.Builder<NodeStatus> snapshot = ImmutableSet.builder();196      for (Map.Entry<Availability, Set<NodeStatus>> entry : nodes.entrySet()) {197        entry.getValue().stream()198          .map(status -> rewrite(status, entry.getKey()))199          .forEach(snapshot::add);200      }201      return snapshot.build();202    } finally {203      readLock.unlock();204    }205  }206  private Set<NodeStatus> nodes(Availability availability) {207    return nodes.computeIfAbsent(availability, ignored -> new HashSet<>());208  }209  private AvailabilityAndNode findNode(NodeId id) {210    for (Map.Entry<Availability, Set<NodeStatus>> entry : nodes.entrySet()) {211      for (NodeStatus nodeStatus : entry.getValue()) {212        if (id.equals(nodeStatus.getId())) {213          return new AvailabilityAndNode(entry.getKey(), nodeStatus);214        }215      }216    }217    return null;218  }219  private NodeStatus rewrite(NodeStatus status, Availability availability) {220    return new NodeStatus(221      status.getId(),222      status.getUri(),223      status.getMaxSessionCount(),224      status.getSlots(),225      availability,226      status.getRegistrationSecret() == null ? null : new Secret(status.getRegistrationSecret()));227  }228  private void release(SessionId id) {229    if (id == null) {230      return;231    }232    Lock writeLock = lock.writeLock();233    writeLock.lock();234    try {235      for (Map.Entry<Availability, Set<NodeStatus>> entry : nodes.entrySet()) {236        for (NodeStatus node : entry.getValue()) {237          for (Slot slot : node.getSlots()) {238            if (!slot.getSession().isPresent()) {239              continue;240            }241            if (id.equals(slot.getSession().get().getId())) {242              Slot released = new Slot(243                slot.getId(),244                slot.getStereotype(),245                slot.getLastStarted(),246                Optional.empty());247              amend(entry.getKey(), node, released);248              return;249            }250          }251        }252      }253    } finally {254      writeLock.unlock();255    }256  }257  private void reserve(NodeStatus status, Slot slot) {258    Instant now = Instant.now();259    Slot reserved = new Slot(260      slot.getId(),261      slot.getStereotype(),262      now,263      Optional.of(new Session(264        RESERVED,265        status.getUri(),266        slot.getStereotype(),267        slot.getStereotype(),268        now)));269    amend(UP, status, reserved);270  }271  public void setSession(SlotId slotId, Session session) {272    Require.nonNull("Slot ID", slotId);273    AvailabilityAndNode node = findNode(slotId.getOwningNodeId());274    if (node == null) {275      LOG.warning("Grid model and reality have diverged. Unable to find node " + slotId.getOwningNodeId());276      return;277    }278    Optional<Slot> maybeSlot = node.status.getSlots().stream()279      .filter(slot -> slotId.equals(slot.getId()))280      .findFirst();281    if (!maybeSlot.isPresent()) {282      LOG.warning("Grid model and reality have diverged. Unable to find slot " + slotId);283      return;284    }285    Slot slot = maybeSlot.get();286    Optional<Session> maybeSession = slot.getSession();287    if (!maybeSession.isPresent()) {288      LOG.warning("Grid model and reality have diverged. Slot is not reserved. " + slotId);289      return;290    }291    Session current = maybeSession.get();292    if (!RESERVED.equals(current.getId())) {293      LOG.warning("Gid model and reality have diverged. Slot has session and is not reserved. " + slotId);294      return;295    }296    Slot updated = new Slot(297      slot.getId(),298      slot.getStereotype(),299      session == null ? slot.getLastStarted() : session.getStartTime(),300      Optional.ofNullable(session));301    amend(node.availability, node.status, updated);302  }303  private void amend(Availability availability, NodeStatus status, Slot slot) {304    Set<Slot> newSlots = new HashSet<>(status.getSlots());305    newSlots.removeIf(s -> s.getId().equals(slot.getId()));306    newSlots.add(slot);307    nodes(availability).remove(status);308    nodes(availability).add(new NodeStatus(309      status.getId(),310      status.getUri(),311      status.getMaxSessionCount(),312      newSlots,313      status.getAvailability(),314      status.getRegistrationSecret() == null ? null : new Secret(status.getRegistrationSecret())));315  }316  private static class AvailabilityAndNode {317    public final Availability availability;318    public final NodeStatus status;319    public AvailabilityAndNode(Availability availability, NodeStatus status) {320      this.availability = availability;321      this.status = status;322    }323  }324}...

Source:AddingNodesTest.java

...29import org.openqa.selenium.grid.component.HealthCheck;30import org.openqa.selenium.grid.data.CreateSessionRequest;31import org.openqa.selenium.grid.data.CreateSessionResponse;32import org.openqa.selenium.grid.data.DistributorStatus;33import org.openqa.selenium.grid.data.NodeStatus;34import org.openqa.selenium.grid.data.NodeStatusEvent;35import org.openqa.selenium.grid.data.Session;36import org.openqa.selenium.grid.data.SessionClosedEvent;37import org.openqa.selenium.grid.distributor.local.LocalDistributor;38import org.openqa.selenium.grid.distributor.remote.RemoteDistributor;39import org.openqa.selenium.grid.node.CapabilityResponseEncoder;40import org.openqa.selenium.grid.node.Node;41import org.openqa.selenium.grid.node.local.LocalNode;42import org.openqa.selenium.events.local.GuavaEventBus;43import org.openqa.selenium.grid.testing.TestSessionFactory;44import org.openqa.selenium.grid.sessionmap.local.LocalSessionMap;45import org.openqa.selenium.grid.web.CombinedHandler;46import org.openqa.selenium.grid.web.RoutableHttpClientFactory;47import org.openqa.selenium.remote.SessionId;48import org.openqa.selenium.remote.http.HttpClient;49import org.openqa.selenium.remote.http.HttpRequest;50import org.openqa.selenium.remote.http.HttpResponse;51import org.openqa.selenium.remote.tracing.DistributedTracer;52import org.openqa.selenium.support.ui.FluentWait;53import org.openqa.selenium.support.ui.Wait;54import java.net.MalformedURLException;55import java.net.URI;56import java.net.URISyntaxException;57import java.net.URL;58import java.time.Duration;59import java.util.HashSet;60import java.util.Objects;61import java.util.Optional;62import java.util.Set;63import java.util.UUID;64import java.util.function.Function;65public class AddingNodesTest {66  private static final Capabilities CAPS = new ImmutableCapabilities("cheese", "gouda");67  private Distributor distributor;68  private DistributedTracer tracer;69  private EventBus bus;70  private HttpClient.Factory clientFactory;71  private Wait<Object> wait;72  private URL externalUrl;73  private CombinedHandler handler;74  @Before75  public void setUpDistributor() throws MalformedURLException {76    tracer = DistributedTracer.builder().build();77    bus = new GuavaEventBus();78    handler = new CombinedHandler();79    externalUrl = new URL("http://example.com");80    clientFactory = new RoutableHttpClientFactory(81        externalUrl,82        handler,83        HttpClient.Factory.createDefault());84    LocalSessionMap sessions = new LocalSessionMap(tracer, bus);85    Distributor local = new LocalDistributor(tracer, bus, clientFactory, sessions);86    handler.addHandler(local);87    distributor = new RemoteDistributor(tracer, clientFactory, externalUrl);88    wait = new FluentWait<>(new Object()).withTimeout(Duration.ofSeconds(2));89  }90  @Test91  public void shouldBeAbleToRegisterALocalNode() throws URISyntaxException {92    URI sessionUri = new URI("http://example:1234");93    Node node = LocalNode.builder(tracer, bus, clientFactory, externalUrl.toURI())94        .add(CAPS, new TestSessionFactory((id, caps) -> new Session(id, sessionUri, caps)))95        .build();96    handler.addHandler(node);97    distributor.add(node);98    wait.until(obj -> distributor.getStatus().hasCapacity());99    DistributorStatus.NodeSummary summary = getOnlyElement(distributor.getStatus().getNodes());100    assertEquals(1, summary.getStereotypes().get(CAPS).intValue());101  }102  @Test103  public void shouldBeAbleToRegisterACustomNode() throws URISyntaxException {104    URI sessionUri = new URI("http://example:1234");105    Node node = new CustomNode(106        tracer,107        bus,108        UUID.randomUUID(),109        externalUrl.toURI(),110        c -> new Session(new SessionId(UUID.randomUUID()), sessionUri, c));111    handler.addHandler(node);112    distributor.add(node);113    wait.until(obj -> distributor.getStatus().hasCapacity());114    DistributorStatus.NodeSummary summary = getOnlyElement(distributor.getStatus().getNodes());115    assertEquals(1, summary.getStereotypes().get(CAPS).intValue());116  }117  @Test118  public void shouldBeAbleToRegisterNodesByListeningForEvents() throws URISyntaxException {119    URI sessionUri = new URI("http://example:1234");120    Node node = LocalNode.builder(tracer, bus, clientFactory, externalUrl.toURI())121        .add(CAPS, new TestSessionFactory((id, caps) -> new Session(id, sessionUri, caps)))122        .build();123    handler.addHandler(node);124    bus.fire(new NodeStatusEvent(node.getStatus()));125    wait.until(obj -> distributor.getStatus().hasCapacity());126    DistributorStatus.NodeSummary summary = getOnlyElement(distributor.getStatus().getNodes());127    assertEquals(1, summary.getStereotypes().get(CAPS).intValue());128  }129  @Test130  public void distributorShouldUpdateStateOfExistingNodeWhenNodePublishesStateChange()131      throws URISyntaxException {132    URI sessionUri = new URI("http://example:1234");133    Node node = LocalNode.builder(tracer, bus, clientFactory, externalUrl.toURI())134        .add(CAPS, new TestSessionFactory((id, caps) -> new Session(id, sessionUri, caps)))135        .build();136    handler.addHandler(node);137    bus.fire(new NodeStatusEvent(node.getStatus()));138    // Start empty139    wait.until(obj -> distributor.getStatus().hasCapacity());140    DistributorStatus.NodeSummary summary = getOnlyElement(distributor.getStatus().getNodes());141    assertEquals(1, summary.getStereotypes().get(CAPS).intValue());142    // Craft a status that makes it look like the node is busy, and post it on the bus.143    NodeStatus status = node.getStatus();144    NodeStatus crafted = new NodeStatus(145        status.getNodeId(),146        status.getUri(),147        status.getMaxSessionCount(),148        status.getStereotypes(),149        ImmutableSet.of(new NodeStatus.Active(CAPS, new SessionId(UUID.randomUUID()), CAPS)));150    bus.fire(new NodeStatusEvent(crafted));151    // We claimed the only slot is filled. Life is good.152    wait.until(obj -> !distributor.getStatus().hasCapacity());153  }154  static class CustomNode extends Node {155    private final EventBus bus;156    private final Function<Capabilities, Session> factory;157    private Session running;158    protected CustomNode(159        DistributedTracer tracer,160        EventBus bus,161        UUID nodeId,162        URI uri,163        Function<Capabilities, Session> factory) {164      super(tracer, nodeId, uri);165      this.bus = bus;166      this.factory = Objects.requireNonNull(factory);167    }168    @Override169    public Optional<CreateSessionResponse> newSession(CreateSessionRequest sessionRequest) {170      Objects.requireNonNull(sessionRequest);171      if (running != null) {172        return Optional.empty();173      }174      Session session = factory.apply(sessionRequest.getCapabilities());175      running = session;176      return Optional.of(177          new CreateSessionResponse(178              session,179              CapabilityResponseEncoder.getEncoder(W3C).apply(session)));180    }181    @Override182    public void executeWebDriverCommand(HttpRequest req, HttpResponse resp) {183      throw new UnsupportedOperationException("executeWebDriverCommand");184    }185    @Override186    public Session getSession(SessionId id) throws NoSuchSessionException {187      if (running == null || !running.getId().equals(id)) {188        throw new NoSuchSessionException();189      }190      return running;191    }192    @Override193    public void stop(SessionId id) throws NoSuchSessionException {194      getSession(id);195      running = null;196      bus.fire(new SessionClosedEvent(id));197    }198    @Override199    protected boolean isSessionOwner(SessionId id) {200      return running != null && running.getId().equals(id);201    }202    @Override203    public boolean isSupporting(Capabilities capabilities) {204      return Objects.equals("cake", capabilities.getCapability("cheese"));205    }206    @Override207    public NodeStatus getStatus() {208      Set<NodeStatus.Active> actives = new HashSet<>();209      if (running != null) {210        actives.add(new NodeStatus.Active(CAPS, running.getId(), running.getCapabilities()));211      }212      return new NodeStatus(213          getId(),214          getUri(),215          1,216          ImmutableMap.of(CAPS, 1),217          actives);218    }219    @Override220    public HealthCheck getHealthCheck() {221      return () -> new HealthCheck.Result(true, "tl;dr");222    }223  }224}...

NodeStatus

Using AI Code Generation

1import org.openqa.selenium.grid.data.NodeStatus;2import org.openqa.selenium.grid.data.Session;3import org.openqa.selenium.grid.data.SessionId;4import org.openqa.selenium.grid.data.SessionRequest;5import org.openqa.selenium.grid.data.SessionRequest.SessionRequestOptions;6import org.openqa.selenium.grid.data.SessionRequest.SessionRequestOptions.SessionRequestOptionsBuilder;7import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType;8import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder;9import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder;10import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder;11import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilder;12import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilder;13import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilderBuilder;14import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilderBuilderBuilder;15import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilderBuilderBuilderBuilder;16import org.openqa.selenium.grid.data.SessionRequest.SessionRequestType.SessionRequestTypeBuilder.SessionRequestTypeBuilderBuilder.SessionRequestTypeBuilderBuilderBuilder.SessionRequestTypeBuilderBuilderBuilderBuilder.SessionRequest

NodeStatus

Using AI Code Generation

1package com.automationrhapsody.selenium.grid;2import org.openqa.selenium.grid.data.NodeStatus;3import org.openqa.selenium.grid.data.NodeStatusEvent;4import org.openqa.selenium.grid.data.NodeStatusEvent.NodeStatusListener;5import org.openqa.selenium.grid.distributor.local.LocalDistributor;6import org.openqa.selenium.grid.distributor.local.StickyStrategy;7import org.openqa.selenium.grid.node.local.LocalNode;8import org.openqa.selenium.net.PortProber;9import org.openqa.selenium.remote.http.HttpClient;10import org.openqa.selenium.remote.http.HttpClient.Factory;11import org.openqa.selenium.remote.http.HttpMethod;12import org.openqa.selenium.remote.http.HttpRequest;13import org.openqa.selenium.remote.http.HttpResponse;14import org.openqa.selenium.remote.tracing.DefaultTestTracer;15import org.openqa.selenium.remote.tracing.Tracer;16import java.io.IOException;17import java.net.URI;18import java.net.URISyntaxException;19import java.util.concurrent.TimeUnit;20import java.util.concurrent.TimeoutException;21public class DistributorNodeStatusExample {22    public static void main(String[] args) throws URISyntaxException, IOException, TimeoutException, InterruptedException {23        Tracer tracer = DefaultTestTracer.createTracer();24        Factory factory = HttpClient.Factory.createDefault();25        int distributorPort = PortProber.findFreePort();26        LocalDistributor distributor = new LocalDistributor(tracer, factory, distributorUri, new StickyStrategy());27        distributor.start();28        int nodePort = PortProber.findFreePort();29        LocalNode node = LocalNode.builder(tracer, factory, nodeUri)30                .add(caps -> true, req -> HttpResponse.notFound())31                .build();32        node.start();33        HttpRequest registerRequest = new HttpRequest(HttpMethod.POST, "/session/node");34        registerRequest.setContent(nodeUri.toURL());35        HttpResponse registerResponse = factory.createClient(distributorUri).execute(registerRequest);36        if (registerResponse.getStatus() != 200) {37            throw new IllegalStateException("Unable to register the node to the distributor.");38        }39        distributor.addListener(new NodeStatusListener() {40            public void onSessionCreated(NodeStatusEvent event) {41                NodeStatus nodeStatus = event.getNodeStatus();42                System.out.println("Node " + nodeStatus.getId() + " has created a session.");43            }

NodeStatus

Using AI Code Generation

1NodeStatus nodeStatus = new NodeStatus(2    new NodeId("nodeId"),3    new NodeStatus.State("UP"),4    ImmutableMap.of(),5    new SlotCount(1),6    new SlotCount(1));7System.out.println(nodeStatus.toJson());8{9  "id" : {10  },11  "maxSessionCount" : {12  },13  "sessionCount" : {14  }15}16The following code shows how to use the toJson() method:17NodeStatus nodeStatus = new NodeStatus(18    new NodeId("nodeId"),19    new NodeStatus.State("UP"),20    ImmutableMap.of(),21    new SlotCount(1),22    new SlotCount(1));23System.out.println(nodeStatus.toJson());24{25  "id" : {26  },27  "maxSessionCount" : {28  },29  "sessionCount" : {30  }31}32The following code shows how to use the fromJson() method:33NodeStatus nodeStatus = new NodeStatus(34    new NodeId("nodeId"),35    new NodeStatus.State("UP"),36    ImmutableMap.of(),

Source: How to use @Async with @Scheduled annotation in springboot?

1Map<String,String> sample = new HashMap<>();2sample.put("A","Apple");3sample.put("B", "Ball");4

Source: Pick and move a node in a pannable/zoomable Pane

1HashMap<Integer,Integer> hm = new HashMap<Integer, Integer>();2/*3 *     Logic to put the Key,Value pair in your HashMap hm4 */56// Print the key value pair in one line.78hm.forEach((k, v) -> System.out.println("key: " + k + " value:" + v));910// Just copy and paste above line to your code.11

Source:Pick and move a node in a pannable/zoomable Pane

HashMap<Integer,Integer> hm = new HashMap<Integer, Integer>();
/*
 *     Logic to put the Key,Value pair in your HashMap hm
 */

// Print the key value pair in one line.

hm.forEach((k, v) -> System.out.println("key: " + k + " value:" + v));

// Just copy and paste above line to your code.

Selenium 4 Tutorial:

LambdaTest’s Selenium 4 tutorial is covering every aspects of Selenium 4 testing with examples and best practices. Here you will learn basics, such as how to upgrade from Selenium 3 to Selenium 4, to some advanced concepts, such as Relative locators and Selenium Grid 4 for Distributed testing. Also will learn new features of Selenium 4, such as capturing screenshots of specific elements, opening a new tab or window on the browser, and new protocol adoptions.

Chapters:

Upgrading From Selenium 3 To Selenium 4?: In this chapter, learn in detail how to update Selenium 3 to Selenium 4 for Java binding. Also, learn how to upgrade while using different build tools such as Maven or Gradle and get comprehensive guidance for upgrading Selenium.
What’s New In Selenium 4 & What’s Being Deprecated? : Get all information about new implementations in Selenium 4, such as W3S protocol adaption, Optimized Selenium Grid, and Enhanced Selenium IDE. Also, learn what is deprecated for Selenium 4, such as DesiredCapabilites and FindsBy methods, etc.
Selenium 4 With Python: Selenium supports all major languages, such as Python, C#, Ruby, and JavaScript. In this chapter, learn how to install Selenium 4 for Python and the features of Python in Selenium 4, such as Relative locators, Browser manipulation, and Chrom DevTool protocol.
Selenium 4 Is Now W3C Compliant: JSON Wireframe protocol is retiring from Selenium 4, and they are adopting W3C protocol to learn in detail about the advantages and impact of these changes.
How To Use Selenium 4 Relative Locator? : Selenium 4 came with new features such as Relative Locators that allow constructing locators with reference and easily located constructors nearby. Get to know its different use cases with examples.
Selenium Grid 4 Tutorial For Distributed Testing: Selenium Grid 4 allows you to perform tests over different browsers, OS, and device combinations. It also enables parallel execution browser testing, reads up on various features of Selenium Grid 4 and how to download it, and runs a test on Selenium Grid 4 with best practices.
Selenium Video Tutorials: Binge on video tutorials on Selenium by industry experts to get step-by-step direction from automating basic to complex test scenarios with Selenium.