Esempio n. 1
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        /// <summary>
        /// Register a named entity type by defining the <see cref="Actor.Props"/> of the entity actor and
        /// functions to extract entity and shard identifier from messages. The <see cref="Sharding.ShardRegion"/>
        /// actor for this type can later be retrieved with the <see cref="ShardRegion"/> method.
        /// </summary>
        /// <param name="typeName">The name of the entity type</param>
        /// <param name="entityProps">
        /// The <see cref="Actor.Props"/> of the entity actors that will be created by the <see cref="Sharding.ShardRegion"/>
        /// </param>
        /// <param name="settings">Configuration settings, see <see cref="ClusterShardingSettings"/></param>
        /// <param name="messageExtractor">
        /// Functions to extract the entity id, shard id, and the message to send to the entity from the incoming message.
        /// </param>
        /// <param name="allocationStrategy">Possibility to use a custom shard allocation and rebalancing logic</param>
        /// <param name="handOffMessage">
        /// The message that will be sent to entities when they are to be stopped for a rebalance or
        /// graceful shutdown of a <see cref="Sharding.ShardRegion"/>, e.g. <see cref="PoisonPill"/>.
        /// </param>
        /// <returns>The actor ref of the <see cref="Sharding.ShardRegion"/> that is to be responsible for the shard.</returns>
        public Task <IActorRef> StartAsync(string typeName, Props entityProps, ClusterShardingSettings settings,
                                           IMessageExtractor messageExtractor, IShardAllocationStrategy allocationStrategy, object handOffMessage)
        {
            IdExtractor   idExtractor   = messageExtractor.ToIdExtractor();
            ShardResolver shardResolver = messageExtractor.ShardId;

            return(StartAsync(typeName, entityProps, settings, idExtractor, shardResolver, allocationStrategy, handOffMessage));
        }