Examples with PING_REQ org.apache.cassandra.net.Verb.PING_REQ used on opensource projects

Example 1 with PING_REQ

use of org.apache.cassandra.net.Verb.PING_REQ in project cassandra by apache.

the class StartupClusterConnectivityChecker method sendPingMessages.

/**
 * Sends a "connection warmup" message to each peer in the collection, on every {@link ConnectionType}
 * used for internode messaging (that is not gossip).
 */
private void sendPingMessages(Set<InetAddressAndPort> peers, Map<String, CountDownLatch> dcToRemainingPeers, AckMap acks, Function<InetAddressAndPort, String> getDatacenter) {
    RequestCallback responseHandler = msg -> {
        if (acks.incrementAndCheck(msg.from())) {
            String datacenter = getDatacenter.apply(msg.from());
            // We have to check because we might only have the local DC in the map
            if (dcToRemainingPeers.containsKey(datacenter))
                dcToRemainingPeers.get(datacenter).decrement();
        }
    };
    Message<PingRequest> small = Message.out(PING_REQ, PingRequest.forSmall);
    Message<PingRequest> large = Message.out(PING_REQ, PingRequest.forLarge);
    for (InetAddressAndPort peer : peers) {
        MessagingService.instance().sendWithCallback(small, peer, responseHandler, SMALL_MESSAGES);
        MessagingService.instance().sendWithCallback(large, peer, responseHandler, LARGE_MESSAGES);
    }
}