src/main/java/derms/net/rmulticast/Timeout.java


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package derms.net.rmulticast;

import java.io.Serializable;
import java.time.Duration;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.logging.Logger;

/** If a message is not positively acknowledged after some time, Timeout puts it in the retransmissions list. */
class Timeout<T extends Serializable & Hashable> implements Runnable {
    private static final Duration timeout = Duration.ofSeconds(1);

    private final Message<T> msg;
    private final Set<MessageID> positiveAcks;
    private final BlockingQueue<Message<T>> retransmissions;
    private final Logger log;

    Timeout(Message<T> msg, Set<MessageID> positiveAcks, BlockingQueue<Message<T>> retransmissions) {
        this.msg = msg;
        this.positiveAcks = positiveAcks;
        this.retransmissions = retransmissions;
        this.log = Logger.getLogger(this.getClass().getName());
    }

    @Override
    public void run() {
        try {
            Thread.sleep(timeout.toMillis());
            if (!positiveAcks.contains(msg.id())) {
                log.info("Message "+msg.id()+" not ack'ed after "+timeout+"; retransmitting.");
                retransmissions.put(msg);
            }
        } catch (InterruptedException e) {
            log.info("Timeout thread interrupted: " + e.getMessage());
        }
    }
}