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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.

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