DoNotReconnectToCluster.cpp

/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <future>
#include <chrono>

#include <hazelcast/client/hazelcast_client.h>
#include <hazelcast/client/config/client_connection_strategy_config.h>
#include <hazelcast/client/lifecycle_listener.h>
#include "hazelcast/client/lifecycle_event.h"

int
main()
{
    hazelcast::client::client_config config;

    /**
     * How a client reconnect to cluster after a disconnect can be configured.
     * This parameter is used by default strategy and custom implementations may
     * ignore it if configured. default value is {@link ReconnectMode#ON}
     *
     * This example forces client NOT to reconnect if it ever disconnects from
     * the cluster.
     */
    config.get_connection_strategy_config().set_reconnect_mode(
      hazelcast::client::config::client_connection_strategy_config::OFF);

    auto hz = hazelcast::new_client(std::move(config)).get();

    auto map = hz.get_map("MyMap").get();

    map->put(1, 100);

    std::promise<void> disconnected, connected;

    hz.add_lifecycle_listener(
      hazelcast::client::lifecycle_listener()
        .on_connected([&connected]() { connected.set_value(); })
        .on_disconnected([&disconnected]() { disconnected.set_value(); }));

    // Please shut down the cluster at this point.
    disconnected.get_future().wait();

    std::cout << "Client is disconnected from the cluster now." << std::endl;

    auto connection_future = connected.get_future();
    if (connection_future.wait_for(std::chrono::seconds(10)) !=
        std::future_status::ready) {
        std::cout << "The client did not connect to the cluster 10 seconds "
                     "after disconnection as expected."
                  << std::endl;
    }

    hz.shutdown().get();
    std::cout << "Finished" << std::endl;

    return 0;
}