/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.flink.test.recovery;

import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.RestartStrategyOptions;
import org.apache.flink.runtime.testutils.MiniClusterResourceConfiguration;
import org.apache.flink.test.util.MiniClusterWithClientResource;

import org.junit.ClassRule;

import java.time.Duration;

import static org.apache.flink.configuration.RestartStrategyOptions.RestartStrategyType.EXPONENTIAL_DELAY;

/** Test cluster configuration with exponential-delay recovery. */
public class SimpleRecoveryExponentialDelayRestartStrategyITBase extends SimpleRecoveryITCaseBase {

    @ClassRule
    public static final MiniClusterWithClientResource MINI_CLUSTER_RESOURCE =
            new MiniClusterWithClientResource(
                    new MiniClusterResourceConfiguration.Builder()
                            .setConfiguration(getConfiguration())
                            .setNumberTaskManagers(2)
                            .setNumberSlotsPerTaskManager(2)
                            .build());

    private static Configuration getConfiguration() {
        Configuration config = new Configuration();
        config.set(RestartStrategyOptions.RESTART_STRATEGY, EXPONENTIAL_DELAY.getMainValue());
        config.set(
                RestartStrategyOptions.RESTART_STRATEGY_EXPONENTIAL_DELAY_INITIAL_BACKOFF,
                Duration.ofMillis(5));
        config.set(
                RestartStrategyOptions.RESTART_STRATEGY_EXPONENTIAL_DELAY_MAX_BACKOFF,
                Duration.ofMillis(100));
        config.set(
                RestartStrategyOptions.RESTART_STRATEGY_EXPONENTIAL_DELAY_BACKOFF_MULTIPLIER, 2D);
        config.set(
                RestartStrategyOptions.RESTART_STRATEGY_EXPONENTIAL_DELAY_RESET_BACKOFF_THRESHOLD,
                Duration.ofMillis(1000));
        config.set(RestartStrategyOptions.RESTART_STRATEGY_EXPONENTIAL_DELAY_JITTER_FACTOR, 0.2);

        return config;
    }
}
