/// <summary>
        /// Initialize Aerospike client with suitable hosts to seed the cluster map.
        /// The client policy is used to set defaults and size internal data structures.
        /// For each host connection that succeeds, the client will:
        /// <list type="bullet">
        /// <item>Add host to the cluster map</item>
        /// <item>Request host's list of other nodes in cluster</item>
        /// <item>Add these nodes to cluster map</item>
        /// </list>
        /// <para>
        /// In most cases, only one host is necessary to seed the cluster. The remaining hosts 
        /// are added as future seeds in case of a complete network failure.
        /// </para>
        /// <para>
        /// If one connection succeeds, the client is ready to process database requests.
        /// If all connections fail and the policy's failIfNotConnected is true, a connection 
        /// exception will be thrown. Otherwise, the cluster will remain in a disconnected state
        /// until the server is activated.
        /// </para>
        /// </summary>
        /// <param name="policy">client configuration parameters, pass in null for defaults</param>
        /// <param name="hosts">array of potential hosts to seed the cluster</param>
        /// <exception cref="AerospikeException">if all host connections fail</exception>
        public AerospikeClient(ClientPolicy policy, params Host[] hosts)
        {
            if (policy == null)
            {
                policy = new ClientPolicy();
            }
            this.readPolicyDefault = policy.readPolicyDefault;
            this.writePolicyDefault = policy.writePolicyDefault;
            this.scanPolicyDefault = policy.scanPolicyDefault;
            this.queryPolicyDefault = policy.queryPolicyDefault;
            this.batchPolicyDefault = policy.batchPolicyDefault;
            this.infoPolicyDefault = policy.infoPolicyDefault;

            cluster = new Cluster(policy, hosts);
            cluster.InitTendThread(policy.failIfNotConnected);
        }