Example usage for org.apache.cassandra.db SystemKeyspace loadHostIds

Introduction

In this page you can find the example usage for org.apache.cassandra.db SystemKeyspace loadHostIds.

Prototype

public static Map<InetAddressAndPort, UUID> loadHostIds() 

Source Link

Document

Return a map of store host_ids to IP addresses

Usage

From source file:org.elasticsearch.cassandra.discovery.CassandraDiscovery.java

License:Apache License

@Override
protected void doStart() {

    synchronized (clusterGroup) {
        logger.debug("Connected to cluster [{}]", clusterName.value());

        localAddress = FBUtilities.getLocalAddress();
        localDc = DatabaseDescriptor.getEndpointSnitch().getDatacenter(localAddress);

        InetSocketTransportAddress elasticAddress = (InetSocketTransportAddress) transportService.boundAddress()
                .publishAddress();//from   w  w  w  .  j a  v a  2 s  .  c  o m
        logger.info("Listening address Cassandra=" + localAddress + " Elastic=" + elasticAddress.toString());

        // get local node from cassandra cluster
        {
            Map<String, String> attrs = Maps.newHashMap();
            attrs.put("data", "true");
            attrs.put("master", "true");
            attrs.put("data_center", localDc);
            attrs.put("rack", DatabaseDescriptor.getEndpointSnitch().getRack(localAddress));

            String hostId = SystemKeyspace.getLocalHostId().toString();
            localNode = new DiscoveryNode(buildNodeName(localAddress), hostId,
                    transportService.boundAddress().publishAddress(), attrs, version);
            localNode.status(DiscoveryNodeStatus.ALIVE);
            this.transportService.setLocalNode(localNode); // clusterService start before DiscoveryService.
            master = true;
            clusterGroup.put(this.localNode.getId(), this.localNode);
            logger.info("localNode name={} id={}", this.localNode.getName(), this.localNode.getId());
        }

        // initialize cluster from cassandra system.peers 
        Map<InetAddress, UUID> peers = SystemKeyspace.loadHostIds();
        Map<InetAddress, Map<String, String>> endpointInfo = SystemKeyspace.loadDcRackInfo();
        for (Entry<InetAddress, UUID> entry : peers.entrySet()) {
            if ((!entry.getKey().equals(localAddress))
                    && (localDc.equals(endpointInfo.get(entry.getKey()).get("data_center")))) {
                Map<String, String> attrs = Maps.newHashMap();
                attrs.put("data", "true");
                attrs.put("master", "true");
                attrs.putAll(endpointInfo.get(entry.getKey()));
                DiscoveryNode dn = new DiscoveryNode(buildNodeName(entry.getKey()), entry.getValue().toString(),
                        new InetSocketTransportAddress(entry.getKey(),
                                settings.getAsInt("transport.tcp.port", 9300)),
                        attrs, version);
                EndpointState endpointState = Gossiper.instance.getEndpointStateForEndpoint(entry.getKey());
                if (endpointState == null) {
                    dn.status(DiscoveryNodeStatus.UNKNOWN);
                } else {
                    dn.status((endpointState.isAlive()) ? DiscoveryNodeStatus.ALIVE : DiscoveryNodeStatus.DEAD);
                }
                clusterGroup.put(dn.getId(), dn);
                logger.debug("remanent node addr_ip={} node_name={} host_id={} ", entry.getKey().toString(),
                        dn.getId(), dn.getName());
            }
        }

        Gossiper.instance.register(this);
        updateClusterGroupsFromGossiper();
        updateClusterState("starting-cassandra-discovery", null);
    }
}

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