Examples with ClusterTopologyChangedEvent io.lettuce.core.cluster.event.ClusterTopologyChangedEvent used on opensource projects

Example 1 with ClusterTopologyChangedEvent

use of io.lettuce.core.cluster.event.ClusterTopologyChangedEvent in project lettuce-core by lettuce-io.

the class RedisClusterClient method refreshPartitionsAsync.

/**
 * Asynchronously reload partitions and re-initialize the distribution table.
 *
 * @return a {@link CompletionStage} that signals completion.
 * @since 6.0
 */
public CompletionStage<Void> refreshPartitionsAsync() {
    List<RedisURI> sources = new ArrayList<>();
    Iterable<RedisURI> topologyRefreshSource = getTopologyRefreshSource();
    for (RedisURI redisURI : topologyRefreshSource) {
        sources.add(redisURI);
    }
    EventRecorder.RecordableEvent event = EventRecorder.getInstance().start(new TopologyRefreshEvent(sources));
    if (partitions == null) {
        return initializePartitions().thenAccept(Partitions::updateCache).whenComplete((unused, throwable) -> event.record());
    }
    return loadPartitionsAsync().thenAccept(loadedPartitions -> {
        if (TopologyComparators.isChanged(getPartitions(), loadedPartitions)) {
            logger.debug("Using a new cluster topology");
            List<RedisClusterNode> before = new ArrayList<>(getPartitions());
            List<RedisClusterNode> after = new ArrayList<>(loadedPartitions);
            getResources().eventBus().publish(new ClusterTopologyChangedEvent(before, after));
        }
        this.partitions.reload(loadedPartitions.getPartitions());
        updatePartitionsInConnections();
    }).whenComplete((unused, throwable) -> event.record());
}