Examples with Announcement org.apache.sling.discovery.base.connectors.announcement.Announcement used on opensource projects

Example 1 with Announcement

use of org.apache.sling.discovery.base.connectors.announcement.Announcement in project sling by apache.

the class AbstractClusterTest method pingConnector.

private boolean pingConnector(final VirtualInstance from, final VirtualInstance to) throws UndefinedClusterViewException {
    final Announcement fromAnnouncement = createFromAnnouncement(from);
    Announcement replyAnnouncement = null;
    try {
        replyAnnouncement = ping(to, fromAnnouncement);
    } catch (AssertionError e) {
        logger.warn("pingConnector: ping failed, assertionError: " + e);
        return false;
    } catch (UndefinedClusterViewException e) {
        logger.warn("pingConnector: ping failed, currently the cluster view is undefined: " + e);
        return false;
    }
    registerReplyAnnouncement(from, replyAnnouncement);
    return true;
}

Example 2 with Announcement

use of org.apache.sling.discovery.base.connectors.announcement.Announcement in project sling by apache.

the class AbstractClusterTest method ping.

private Announcement ping(VirtualInstance to, final Announcement incomingTopologyAnnouncement) throws UndefinedClusterViewException {
    final String slingId = to.slingId;
    final ClusterViewService clusterViewService = to.getClusterViewService();
    final AnnouncementRegistry announcementRegistry = to.getAnnouncementRegistry();
    incomingTopologyAnnouncement.removeInherited(slingId);
    final Announcement replyAnnouncement = new Announcement(slingId);
    long backoffInterval = -1;
    final ClusterView clusterView = clusterViewService.getLocalClusterView();
    if (!incomingTopologyAnnouncement.isCorrectVersion()) {
        fail("incorrect version");
        // never reached
        return null;
    } else if (ClusterViewHelper.contains(clusterView, incomingTopologyAnnouncement.getOwnerId())) {
        fail("loop=true");
        // never reached
        return null;
    } else if (ClusterViewHelper.containsAny(clusterView, incomingTopologyAnnouncement.listInstances())) {
        fail("incoming announcement contains instances that are part of my cluster");
        // never reached
        return null;
    } else {
        backoffInterval = announcementRegistry.registerAnnouncement(incomingTopologyAnnouncement);
        if (backoffInterval == -1) {
            fail("rejecting an announcement from an instance that I already see in my topology: ");
            // never reached
            return null;
        } else {
            // normal, successful case: replying with the part of the topology which this instance sees
            replyAnnouncement.setLocalCluster(clusterView);
            announcementRegistry.addAllExcept(replyAnnouncement, clusterView, new AnnouncementFilter() {

                @Override
                public boolean accept(final String receivingSlingId, Announcement announcement) {
                    if (announcement.getPrimaryKey().equals(incomingTopologyAnnouncement.getPrimaryKey())) {
                        return false;
                    }
                    return true;
                }
            });
            return replyAnnouncement;
        }
    }
}

Example 3 with Announcement

use of org.apache.sling.discovery.base.connectors.announcement.Announcement in project sling by apache.

the class TopologyTest method testTwoNodes.

@Test
public void testTwoNodes() throws Throwable {
    VirtualInstanceBuilder builder1 = newBuilder().newRepository("/var/discovery/impl/", true).setDebugName("instance1").setConnectorPingInterval(20).setConnectorPingTimeout(200);
    VirtualInstance instance1 = builder1.build();
    instances.add(instance1);
    VirtualInstanceBuilder builder2 = newBuilder().useRepositoryOf(builder1).setDebugName("instance2").setConnectorPingInterval(20).setConnectorPingTimeout(200);
    VirtualInstance instance2 = builder2.build();
    instances.add(instance2);
    instance1.getConfig().setViewCheckTimeout(8);
    instance1.getConfig().setViewCheckInterval(1);
    instance2.getConfig().setViewCheckTimeout(2);
    instance2.getConfig().setViewCheckInterval(1);
    for (int i = 0; i < 5; i++) {
        instance1.heartbeatsAndCheckView();
        instance2.heartbeatsAndCheckView();
        Thread.sleep(500);
    }
    Set<InstanceDescription> instances1 = instance1.getDiscoveryService().getTopology().getInstances();
    Set<InstanceDescription> instances2 = instance2.getDiscoveryService().getTopology().getInstances();
    assertEquals(1, instances1.size());
    assertEquals(1, instances2.size());
    assertEquals(instance1.getSlingId(), instances1.iterator().next().getSlingId());
    assertEquals(instance2.getSlingId(), instances2.iterator().next().getSlingId());
    new VirtualConnector(instance1, instance2);
    // check instance 1's announcements
    Collection<Announcement> instance1LocalAnnouncements = instance1.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(1, instance1LocalAnnouncements.size());
    Announcement instance1LocalAnnouncement = instance1LocalAnnouncements.iterator().next();
    assertEquals(instance2.getSlingId(), instance1LocalAnnouncement.getOwnerId());
    assertEquals(true, instance1LocalAnnouncement.isInherited());
    // check instance 2's announcements
    Collection<Announcement> instance2LocalAnnouncements = instance2.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(1, instance2LocalAnnouncements.size());
    Announcement instance2LocalAnnouncement = instance2LocalAnnouncements.iterator().next();
    assertEquals(instance1.getSlingId(), instance2LocalAnnouncement.getOwnerId());
    assertEquals(false, instance2LocalAnnouncement.isInherited());
    // check topology
    TopologyHelper.assertTopologyConsistsOf(instance1.getDiscoveryService().getTopology(), instance1.getSlingId(), instance2.getSlingId());
    TopologyHelper.assertTopologyConsistsOf(instance2.getDiscoveryService().getTopology(), instance1.getSlingId(), instance2.getSlingId());
    instance1LocalAnnouncements = instance1.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(1, instance1LocalAnnouncements.size());
    instance2LocalAnnouncements = instance2.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(1, instance2LocalAnnouncements.size());
    // sleep of 2.2sec ensures instance2's heartbeat timeout (which is 2sec) hits
    Thread.sleep(2200);
    instance1LocalAnnouncements = instance1.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(1, instance1LocalAnnouncements.size());
    instance2LocalAnnouncements = instance2.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(0, instance2LocalAnnouncements.size());
    logger.info("testTwoNodes: instance1: " + instance1.getSlingId());
    instance1.dumpRepo();
    logger.info("testTwoNodes: instance2: " + instance2.getSlingId());
    instance2.dumpRepo();
    TopologyHelper.assertTopologyConsistsOf(instance1.getDiscoveryService().getTopology(), instance1.getSlingId(), instance2.getSlingId());
    TopologyHelper.assertTopologyConsistsOf(instance2.getDiscoveryService().getTopology(), instance2.getSlingId());
    // another sleep 6s (2.2+6 = 8.2sec) ensures instance1's heartbeat timeout (which is 8sec) hits as well
    Thread.sleep(6000);
    instance1LocalAnnouncements = instance1.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(0, instance1LocalAnnouncements.size());
    instance2LocalAnnouncements = instance2.getAnnouncementRegistry().listLocalAnnouncements();
    assertEquals(0, instance2LocalAnnouncements.size());
    TopologyHelper.assertTopologyConsistsOf(instance1.getDiscoveryService().getTopology(), instance1.getSlingId());
    TopologyHelper.assertTopologyConsistsOf(instance2.getDiscoveryService().getTopology(), instance2.getSlingId());
}

Example 4 with Announcement

use of org.apache.sling.discovery.base.connectors.announcement.Announcement in project sling by apache.

the class TopologyWebConsolePlugin method printCluster.

/**
     * Render a particular cluster
     */
private void printCluster(final PrintWriter pw, final ClusterView renderCluster, final ClusterView localCluster) {
    final Collection<Announcement> announcements = announcementRegistry.listAnnouncementsInSameCluster(localCluster);
    for (final InstanceDescription instanceDescription : renderCluster.getInstances()) {
        final boolean inLocalCluster = renderCluster == localCluster;
        Announcement parentAnnouncement = null;
        for (Iterator<Announcement> it2 = announcements.iterator(); it2.hasNext(); ) {
            Announcement announcement = it2.next();
            for (Iterator<InstanceDescription> it3 = announcement.listInstances().iterator(); it3.hasNext(); ) {
                InstanceDescription announcedInstance = it3.next();
                if (announcedInstance.getSlingId().equals(instanceDescription.getSlingId())) {
                    parentAnnouncement = announcement;
                    break;
                }
            }
        }
        final boolean isLocal = instanceDescription.isLocal();
        final String slingId = instanceDescription.getSlingId();
        pw.print("Sling ID : ");
        pw.print(slingId);
        pw.println();
        pw.print("Cluster View ID : ");
        pw.print(instanceDescription.getClusterView() == null ? "null" : instanceDescription.getClusterView().getId());
        pw.println();
        pw.print("Local instance : ");
        pw.print(isLocal);
        pw.println();
        pw.print("Leader instance : ");
        pw.print(instanceDescription.isLeader());
        pw.println();
        pw.print("In local cluster : ");
        if (inLocalCluster) {
            pw.print("local");
        } else {
            pw.print("remote");
        }
        pw.println();
        pw.print("Announced by : ");
        if (inLocalCluster) {
            pw.print("n/a");
        } else {
            if (parentAnnouncement != null) {
                pw.print(parentAnnouncement.getOwnerId());
            } else {
                pw.print("(changing)");
            }
        }
        pw.println();
        pw.println("Properties:");
        for (final Map.Entry<String, String> entry : instanceDescription.getProperties().entrySet()) {
            pw.print("- ");
            pw.print(entry.getKey());
            pw.print(" : ");
            pw.print(entry.getValue());
            pw.println();
        }
        pw.println();
        pw.println();
    }
}

Example 5 with Announcement

use of org.apache.sling.discovery.base.connectors.announcement.Announcement in project sling by apache.

the class TopologyWebConsolePlugin method listIncomingTopologyConnectors.

/**
     * Render the incoming topology connectors - including the header-div and table
     */
private void listIncomingTopologyConnectors(final PrintWriter pw) {
    boolean odd = false;
    pw.println("<div class=\"ui-widget-header ui-corner-top buttonGroup\" style=\"height: 15px;\">");
    pw.println("<span style=\"float: left; margin-left: 1em;\">Incoming topology connectors</span>");
    pw.println("</div>");
    pw.println("<table class=\"adapters nicetable ui-widget tablesorter\">");
    pw.println("<thead>");
    pw.println("<tr>");
    pw.println("<th class=\"header ui-widget-header\">Owner slingId</th>");
    pw.println("<th class=\"header ui-widget-header\">Server info</th>");
    pw.println("<th class=\"header ui-widget-header\">Last heartbeat</th>");
    pw.println("<th class=\"header ui-widget-header\">Timeout</th>");
    pw.println("</tr>");
    pw.println("</thead>");
    pw.println("<tbody>");
    Collection<CachedAnnouncement> incomingConnections = announcementRegistry.listLocalIncomingAnnouncements();
    for (Iterator<CachedAnnouncement> it = incomingConnections.iterator(); it.hasNext(); ) {
        CachedAnnouncement incomingCachedAnnouncement = it.next();
        Announcement incomingAnnouncement = incomingCachedAnnouncement.getAnnouncement();
        String oddEven = odd ? "odd" : "even";
        odd = !odd;
        pw.println("<tr class=\"" + oddEven + " ui-state-default\">");
        pw.println("<td>" + incomingAnnouncement.getOwnerId() + "</td>");
        if (incomingAnnouncement.getServerInfo() != null) {
            pw.println("<td>" + incomingAnnouncement.getServerInfo() + "</td>");
        } else {
            pw.println("<td><i>n/a</i></td>");
        }
        pw.println("<td>" + beautifiedTimeDiff(incomingCachedAnnouncement.getLastPing()) + "</td>");
        pw.println("<td>" + beautifiedDueTime(incomingCachedAnnouncement.getSecondsUntilTimeout()) + "</td>");
        pw.println("</tr>");
    }
    pw.println("</tbody>");
    pw.println("</table>");
    pw.println("<br/>");
    pw.println("<br/>");
}