/*
 * 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.kubernetes.entrypoint;

import org.apache.flink.api.common.time.Time;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.GlobalConfiguration;
import org.apache.flink.configuration.JobManagerOptions;
import org.apache.flink.configuration.ResourceManagerOptions;
import org.apache.flink.kubernetes.runtime.clusterframework.KubernetesSessionResourceManager;
import org.apache.flink.runtime.akka.AkkaUtils;
import org.apache.flink.runtime.clusterframework.FlinkResourceManager;
import org.apache.flink.runtime.clusterframework.types.ResourceID;
import org.apache.flink.runtime.entrypoint.ClusterInformation;
import org.apache.flink.runtime.entrypoint.SessionClusterEntrypoint;
import org.apache.flink.runtime.heartbeat.HeartbeatServices;
import org.apache.flink.runtime.highavailability.HighAvailabilityServices;
import org.apache.flink.runtime.metrics.MetricRegistry;
import org.apache.flink.runtime.resourcemanager.ResourceManager;
import org.apache.flink.runtime.resourcemanager.ResourceManagerConfiguration;
import org.apache.flink.runtime.resourcemanager.ResourceManagerRuntimeServices;
import org.apache.flink.runtime.resourcemanager.ResourceManagerRuntimeServicesConfiguration;
import org.apache.flink.runtime.resourcemanager.slotmanager.DynamicAssigningSlotManager;
import org.apache.flink.runtime.resourcemanager.slotmanager.SlotManager;
import org.apache.flink.runtime.rpc.FatalErrorHandler;
import org.apache.flink.runtime.rpc.RpcService;
import org.apache.flink.runtime.security.SecurityContext;
import org.apache.flink.runtime.util.EnvironmentInformation;
import org.apache.flink.runtime.util.JvmShutdownSafeguard;
import org.apache.flink.runtime.util.SignalHandler;

import javax.annotation.Nullable;

/**
 * Entry point for Kubernetes session clusters.
 */
public class KubernetesSessionClusterEntrypoint extends SessionClusterEntrypoint {

	public KubernetesSessionClusterEntrypoint(Configuration configuration) {
		super(configuration);
	}

	@Override
	protected SecurityContext installSecurityContext(Configuration configuration) throws Exception {
		return super.installSecurityContext(configuration);
	}

	@Override
	protected String getRPCPortRange(Configuration configuration) {
		return String.valueOf(configuration.getInteger(JobManagerOptions.PORT));
	}

	@Override
	protected ResourceManager<?> createResourceManager(
			Configuration configuration,
			ResourceID resourceId,
			RpcService rpcService,
			HighAvailabilityServices highAvailabilityServices,
			HeartbeatServices heartbeatServices,
			MetricRegistry metricRegistry,
			FatalErrorHandler fatalErrorHandler,
			ClusterInformation clusterInformation,
			@Nullable String webInterfaceUrl) throws Exception {
		final ResourceManagerConfiguration resourceManagerConfiguration = ResourceManagerConfiguration.fromConfiguration(configuration);
		final ResourceManagerRuntimeServicesConfiguration resourceManagerRuntimeServicesConfiguration = ResourceManagerRuntimeServicesConfiguration.fromConfiguration(configuration);
		final ResourceManagerRuntimeServices resourceManagerRuntimeServices = ResourceManagerRuntimeServices.fromConfiguration(
			resourceManagerRuntimeServicesConfiguration,
			highAvailabilityServices,
			rpcService.getScheduledExecutor());
		SlotManager slotManager = new DynamicAssigningSlotManager(
			rpcService.getScheduledExecutor(),
			resourceManagerRuntimeServicesConfiguration.getSlotManagerConfiguration().getTaskManagerRequestTimeout(),
			resourceManagerRuntimeServicesConfiguration.getSlotManagerConfiguration().getSlotRequestTimeout(),
			configuration.contains(ResourceManagerOptions.TASK_MANAGER_TIMEOUT) ?
				resourceManagerRuntimeServicesConfiguration.getSlotManagerConfiguration().getTaskManagerTimeout() :
				Time.seconds(AkkaUtils.INF_TIMEOUT().toSeconds()),
			resourceManagerRuntimeServicesConfiguration.getSlotManagerConfiguration().getTaskManagerCheckerInitialDelay());
		return new KubernetesSessionResourceManager(
			rpcService,
			FlinkResourceManager.RESOURCE_MANAGER_NAME,
			resourceId,
			configuration,
			resourceManagerConfiguration,
			highAvailabilityServices,
			heartbeatServices,
			slotManager,
			metricRegistry,
			resourceManagerRuntimeServices.getJobLeaderIdService(),
			clusterInformation,
			fatalErrorHandler);
	}

	public static void main(String[] args) {
		// startup checks and logging
		EnvironmentInformation.logEnvironmentInfo(LOG, KubernetesSessionClusterEntrypoint.class.getSimpleName(), args);
		SignalHandler.register(LOG);
		JvmShutdownSafeguard.installAsShutdownHook(LOG);

		Configuration configuration = GlobalConfiguration.loadConfiguration();

		KubernetesSessionClusterEntrypoint kubernetesSessionClusterEntrypoint =
			new KubernetesSessionClusterEntrypoint(configuration);

		kubernetesSessionClusterEntrypoint.startCluster();
	}
}